CN109681159B - Oil field multitube layering water injection string - Google Patents
Oil field multitube layering water injection string Download PDFInfo
- Publication number
- CN109681159B CN109681159B CN201710967681.2A CN201710967681A CN109681159B CN 109681159 B CN109681159 B CN 109681159B CN 201710967681 A CN201710967681 A CN 201710967681A CN 109681159 B CN109681159 B CN 109681159B
- Authority
- CN
- China
- Prior art keywords
- pipe
- packer
- sleeve
- water
- water injection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 192
- 238000002347 injection Methods 0.000 title claims abstract description 96
- 239000007924 injection Substances 0.000 title claims abstract description 96
- 239000010410 layer Substances 0.000 claims abstract description 53
- 239000004576 sand Substances 0.000 claims abstract description 24
- 239000011229 interlayer Substances 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 31
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 238000009826 distribution Methods 0.000 claims description 7
- 238000012856 packing Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- 239000003921 oil Substances 0.000 description 45
- 238000010276 construction Methods 0.000 description 4
- 239000010779 crude oil Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses an oil field multi-pipe separate-layer water injection pipe column, wherein a safety packer and a water distributor are sequentially arranged on an oil pipe from top to bottom, the sand control pipe column is sleeved outside the oil pipe, a sieve pipe communicated with each water injection layer is arranged on the sand control pipe column, a positioning joint is arranged at the upper end of the sand control pipe column and is positioned below the safety packer, a plug is arranged at the bottom of the sand control pipe column, an interlayer packer is arranged on the oil pipe and is positioned between every two water injection layers, a multi-pipe separate-layer water injection safety valve is also arranged on the oil pipe and is positioned above the safety packer, the water distributor is a multi-pipe water distributor, the multi-pipe water distributors are correspondingly communicated with the respective water injection layers except for the water injection layer at the bottommost layer, the lower port of the oil pipe is. The invention realizes the adjustment without stopping injection and improves the production efficiency of water injection production.
Description
Technical Field
The invention relates to a separate-layer water injection device, in particular to an oil field multi-pipe separate-layer water injection pipe column.
Background
After the oil field is put into development, the energy of the stratum is continuously consumed along with the extension of the exploitation time, the pressure of an oil layer is continuously reduced, the underground crude oil is degassed, the viscosity is increased, the yield of an oil well is reduced, even the stop of injection and production stop can be caused, and a large amount of underground crude oil can not be extracted. In order to make up for the underground deficit caused by the production of crude oil, maintain or improve the pressure of an oil layer and realize high and stable yield of an oil field, water must be injected into the oil field. As oil fields enter high water cut production stages, the demand for zonal water injection is increasing. The existing adjustable water distributor needs to be regularly measured and adjusted, has the problems of high construction cost, manpower and material waste, large construction risk and the like, and needs to be further improved and solved.
Through searching, application number: 201610002105.X, published Japanese 2016-03-30 discloses a four-tube stratified water injection process string, which comprises a casing and a wellhead, wherein an upper bridge plug, a middle bridge plug and a lower bridge plug are sequentially arranged in the casing from top to bottom at intervals, the upper bridge plug, the middle bridge plug and the lower bridge plug divide the interior of the casing into four sections along the axial direction, each section corresponds to a water injection layer, the water injection pipe comprises a coaxial outer oil pipe, a middle oil pipe and an inner oil pipe, the outer oil pipe, the middle oil pipe and the inner oil pipe divide the interior of the casing into a set of an outer annular water injection channel, an outer middle annular water injection channel, a middle inner annular water injection channel and a central water injection channel along the radial direction, each layer of the four-tube stratified water injection process string is provided with an independent water injection channel, and a water distribution.
And application No.: compared with the patent X201610002105, the application is applicable to a casing pipe of 5-1/2 ' and an oil pipe with the largest outer diameter is 31/2 ', and the casing pipe is too large in size and is not applicable to most water wells, particularly offshore wells, and the outer layer sand control casing pipe is generally a 41/2 ' casing pipe due to the sand control requirement. The oil pipe is suitable for 41/2 'sleeves and 27/8' oil pipes, and has more compact structure and wider application range. The four-pipe separate-layer water injection process pipe column can only meet the requirement of four-layer water injection, the requirement on fine water injection of a water well is higher and higher at present, and the requirement cannot be met by four-layer water injection. This patent is applicable to 6 layers of layering water injection well, and each layer water yield does not influence each other, can follow each layer water yield of ground regulation, reduces the operation number of times, practices thrift the cost.
In conclusion, the application and the retrieval publication of the invention adopt different technical schemes, develop another idea of multi-pipe stratified water injection, and have own unique technical effect advantages.
Disclosure of Invention
The invention aims to provide an oil field multi-pipe separate-layer water injection pipe column, which reduces the labor requirement during water distributor adjustment and shortens the construction time; the non-stop injection adjustment is realized, the production efficiency of the water injection production is improved, and the production cost is saved; and the operation risk is reduced at the same time because the tool is not needed to be lowered into the well for adjustment.
In order to achieve the purpose, the invention adopts the following technical scheme that the oilfield multi-pipe separate layer water injection pipe column comprises an oil pipe and a sand control pipe column, wherein a safety packer and a water distributor are sequentially arranged on the oil pipe from top to bottom, the sand control pipe column is sleeved outside the oil pipe, a sieve pipe communicated with each water injection layer is arranged on the sand control pipe column, a positioning joint is arranged at the upper end of the sand control pipe column and is positioned below the safety packer, a screwed plug is arranged at the bottom of the sand control pipe column, an interlayer packer is arranged on the oil pipe and is positioned between every two water injection layers, a multi-pipe separate layer water injection safety valve is also arranged on the oil pipe and is positioned above the safety packer, the water distributor is a multi-pipe water distributor, the number of the multi-pipe water distributor is one less than that of the water injection layers, namely the multi-pipe water distributors are, the lower port of the oil pipe is correspondingly communicated with the bottommost water injection layer, and the interlayer packer is a multi-pipe packer; multitube layering water injection relief valve, including relief valve outer tube, last seal cover, lower seal cover, relief valve distributive pipe, connecting pipe, go up the seal cover and assemble in proper order inside the relief valve outer tube with lower seal cover top-down, go up the center channel that the seal cover is seted up at seal cover center down and be linked together, set up the well expert uniflow mechanism that can only down flow in the center channel, the relief valve distributive pipe sets up five at least, is the annular matrix equipartition at last seal cover axial eccentric downthehole, the connecting pipe sets up quantity the same with the relief valve distributive pipe, connecting pipe upper end intercommunication relief valve distributive pipe, the connecting pipe lower extreme sets up the one-way flow mechanism that divides that can only the downf.
The middle-through one-way flow mechanism comprises a large pressure spring, a large steel ball and a switch sleeve which are connected, wherein the upper end of the large pressure spring is clamped on a ring table arranged in a central hole of an upper sealing sleeve, the lower end of the large steel ball is propped against a port of the switch sleeve, the lower end of the switch sleeve is fixed in the central hole of a lower sealing sleeve, and the switch sleeve is close to a side through hole in the radial direction of the outer wall of the upper port; the water diversion unidirectional flow mechanism comprises a small steel ball and a small pressure spring which are connected, wherein the small pressure spring presses and seals the small steel ball at the lower port of the connecting pipe; the upper and lower sealing sleeves are provided with hydraulic control pipeline channels for passing through hydraulic control pipelines; the upper end and the lower end of the outer pipe are respectively connected with an oil pipe through an upper joint and a lower joint.
The multi-pipe water distributor comprises a water distributor diversion pipe, a water distributor main body, a water distributor sealing sleeve, a movable sleeve, a water distributor pressure spring, an adjusting sleeve and a fixing sleeve, wherein the water distributor sealing sleeve is arranged inside the water distributor main body, the water distributor sealing sleeve is provided with a blind hole, a central hole and four diversion holes, the upper end and the lower end of the water distributor main body are connected with oil pipes, the movable sleeve is sleeved outside the water distributor main body, the water distributor main body is provided with radial holes, the inner cavity of the movable sleeve is communicated with the blind hole through the radial holes, the upper port of the blind hole is communicated with the water distributor diversion pipe, and the upper end of the water distributor diversion pipe is communicated with.
The multi-pipe water distributor further comprises a water distributor pressure spring, an adjusting sleeve and a fixing sleeve, the fixing sleeve is arranged on the oil pipe, the adjusting sleeve is connected to the outside of the fixing sleeve, and the water distributor pressure spring is arranged between the upper end face of the adjusting sleeve and the lower end face of the movable sleeve.
The multi-pipe packer comprises a hydraulic pipe, a packer shunt pipe, a packer main body, a rubber sleeve, a piston and a cylinder sleeve, wherein the cylinder sleeve, the piston and the rubber sleeve are sleeved outside the packer main body, the piston is located in the rigid sleeve, one end of the piston abuts against the end part of the rubber sleeve, the packer main body is provided with a radial hole, the radial hole enables the cylinder sleeve inner cavity and the axial hydraulic pipe which is arranged by the packer main body to be communicated, the packer main body is further provided with a central hole and five shunt holes in the axial direction, the five shunt holes are communicated with the five packer shunt pipes, and the packer shunt pipe is communicated with the safety valve shunt.
And a sealing hole for installing a sealing plug is formed in the cylinder sleeve, and the sealing plug is aligned with a radial hole formed in the packer main body.
The packer is characterized in that the upper end of the packer main body is connected with an upper outer tube of the packer, an upper joint of the packer is arranged inside the upper outer tube of the packer, the upper joint of the packer is connected with an oil tube, the lower end of the packer main body is connected with a lower outer tube of the packer, a lower joint of the packer is arranged inside the lower outer tube of the packer, and the lower joint of the packer is.
The packer upper joint is connected with the upper positioning sleeve through a screw, the upper positioning sleeve is positioned inside the upper outer pipe of the packer, the packer lower joint is connected with the lower positioning sleeve through a screw, and the lower positioning sleeve is positioned inside the lower outer pipe of the packer.
Compared with the prior art, the invention has the following beneficial effects:
1. the water injection pressure and the injection amount of each layer section are monitored in real time, the injection allocation amount of the water distributor is adjusted without stopping injection, and the production efficiency is improved;
2. the water distributor has high adjusting speed, does not need a testing instrument to go into the well, reduces the production cost and saves manpower and material resources.
Drawings
FIG. 1 is a schematic structural diagram of an oilfield multi-tubular separate zone water injection string according to the present invention;
FIG. 2 is a schematic of the multi-tube annulus relief valve configuration;
FIG. 3 is a cross-sectional view of FIG. 2;
FIG. 4 is a schematic diagram of a multi-tube water distributor;
FIG. 5 is a schematic diagram of a multi-tube packer construction.
In the figure: 101. a multi-pipe separated layer water injection safety valve; 102. a safety packer; 103. positioning the joint; 104. a multi-tube packer; 105. a multi-tube water distributor; 106. a hydraulic control line; 107. a sand control pipe column;
the hydraulic control safety valve comprises an oil pipe 1, a safety valve water diversion pipe 2, an upper joint 3, an upper sealing sleeve 4, a large pressure spring 5, a large steel ball 6, a connecting pipe 7, a switch sleeve 8, a safety valve outer pipe 9, a small steel ball 10, a small pressure spring 11, a screw 12, a lower sealing sleeve 13, a lower joint 14 and a hydraulic control line pipe channel 15;
502. a water diversion pipe of the water distributor; 503. a water distributor body; 504. a water distributor seal sleeve; 505. a movable sleeve; 506. a pressure spring of the water distributor; 507. an adjusting sleeve; 508. fixing a sleeve;
401. a hydraulic tube; 402. a water distribution pipe of the packer; 403. an outer packer tube; 404. a packer body; 405. a rubber cylinder; 406. a piston; 407. a sealing plug; 408. a cylinder liner; 409. a screw; 410. mounting a positioning sleeve; 411. and a lower positioning sleeve.
Detailed Description
The detailed description and technical contents of the present invention are described below with reference to the accompanying drawings, which are, however, for reference and illustration purposes only and are not intended to limit the present invention.
As shown in attached figures 1 to 5, the oilfield multi-pipe separate layer water injection string comprises an oil pipe and a conventional sand control string, wherein a safety packer 102 and a water distributor are sequentially arranged on the oil pipe from top to bottom, the sand control string is sleeved outside the oil pipe, a sieve pipe communicated with each water injection layer is arranged on the sand control string 107, a positioning joint 103 is arranged at the upper end of the sand control string and is positioned below the safety packer, a plug is arranged at the bottom of the sand control string, an interlayer packer is arranged on the oil pipe and is positioned between every two water injection layers, a multi-pipe separate layer water injection safety valve 101 is also arranged on the oil pipe and is positioned above the safety packer, the water distributor is a multi-pipe water distributor 105, the number of the multi-pipe water distributors is one less than that of the water injection layers, namely the multi-pipe water distributors are correspondingly communicated with the respective water injection layers except, the lower port of the oil pipe is correspondingly communicated with the bottommost water injection layer, and the interlayer packer is a multi-pipe packer 104; multitube layering water injection relief valve, including relief valve outer tube 9, upper seal cover 4, lower seal cover 13, relief valve distributive pipe 2, connecting pipe 7, upper seal cover and lower seal cover top-down assemble in proper order inside the relief valve outer tube, the central passage that is linked together is seted up at upper seal cover and lower seal cover center, set up the well expert uniflow mechanism that can only down flow in the central passage, the relief valve distributive pipe sets up five at least, is the annular matrix equipartition at the upper seal cover axial eccentric centre, connecting pipe 7 sets up the quantity the same with the relief valve distributive pipe, and connecting pipe upper end intercommunication relief valve distributive pipe, the connecting pipe lower extreme sets up the one-way flow mechanism that divides water that can only the downflow.
The middle-through unidirectional flow mechanism comprises a large pressure spring 5, a large steel ball 6 and a switch sleeve 8 which are connected, wherein the upper end of the large pressure spring 5 is clamped on a ring table arranged in a central hole of an upper seal sleeve, the lower end of the large steel ball 6 is propped against an upper port of the switch sleeve, the lower end of the switch sleeve is fixed in the central hole of a lower seal sleeve, and the switch sleeve 8 is close to a radial side through hole of the outer wall of the upper port; the water diversion unidirectional flow mechanism comprises a small steel ball 10 and a small pressure spring 11 which are connected, wherein the small pressure spring presses and seals the small steel ball at the lower port of the connecting pipe; the upper and lower sealing sleeves are provided with hydraulic control pipeline channels 15 for passing through hydraulic control pipelines; the upper end and the lower end of the outer pipe are respectively connected with an oil pipe through an upper joint and a lower joint.
The multi-pipe water distributor comprises a water distributor diversion pipe 502, a water distributor main body 503, a water distributor sealing sleeve 504 and a movable sleeve 505, wherein the water distributor sealing sleeve is arranged inside the water distributor main body, the water distributor sealing sleeve is provided with a blind hole, a central hole and four diversion holes, the upper end and the lower end of the water distributor main body are both connected with an oil pipe 1, the movable sleeve is sleeved outside the water distributor main body, the water distributor main body is provided with radial holes, the radial holes enable the inner cavity of the movable sleeve to be communicated with the blind hole, the upper end opening of the blind hole is communicated with the water distributor diversion pipe, and the upper end of the water distributor diversion pipe is communicated with one.
The multi-pipe water distributor further comprises a water distributor pressure spring 506, an adjusting sleeve 507 and a fixing sleeve 508, the fixing sleeve is arranged on the oil pipe, the adjusting sleeve is connected to the outside of the fixing sleeve, and the water distributor pressure spring is arranged between the upper end face of the adjusting sleeve and the lower end face of the movable sleeve.
The multi-pipe packer comprises a hydraulic pipe 401, a packer shunt pipe 402, a packer main body 404, a rubber sleeve 405, a piston 406 and a cylinder sleeve 408, wherein the cylinder sleeve, the piston and the rubber sleeve are sleeved outside the packer main body, the piston is located in a rigid sleeve, one end of the piston abuts against the end part of the rubber sleeve, the packer main body is provided with a radial hole, the radial hole enables an inner cavity of the cylinder sleeve and the axial hydraulic pipe which is arranged on the packer main body to be communicated, the packer main body is further provided with a central hole and five shunt holes in the axial direction, the five shunt holes are communicated with five packer shunt pipes, and the packer shunt pipe is communicated with a safety valve.
The cylinder liner is provided with a sealing bore for mounting a sealing plug 407 which is aligned with a radial bore provided in the packer body.
The upper end of the packer main body is connected with an upper outer tube 403 of the packer, an upper joint of the packer is arranged inside the upper outer tube of the packer, the upper joint of the packer is connected with an oil tube, the lower end of the packer main body is connected with a lower outer tube of the packer, a lower joint of the packer is arranged inside the lower outer tube of the packer, and the lower joint of the packer is connected with the oil tube. The upper joint of the packer is connected with an upper positioning sleeve 410 through a screw, the upper positioning sleeve is positioned inside an upper outer tube of the packer, the lower joint of the packer is connected with a lower positioning sleeve 411 through a screw, and the lower positioning sleeve is positioned inside a lower outer tube of the packer.
As shown in fig. 4, 5 water distribution pipes correspond to 5 multi-pipe water distributors, the water distribution pipes 502 of the water distributor are inserted into a sealing sleeve 504 of the water distributor, a main body 503 of the water distributor is fixed on an oil pipe 1 in a threaded manner, a movable sleeve 505 is sleeved outside the main body and can slide up and down, a pressure spring 6 of the water distributor is sleeved outside the oil pipe, a lower fixed sleeve 508 is fixed on the oil pipe in a threaded manner, and the position of the pressure spring can be adjusted by an adjusting sleeve 507. When the water injection device works, fluid enters the drawing from the water distribution pipe, the movable sleeve is pushed downwards through the small hole of the main body to compress the pressure spring, the water injection channel is opened, and the amount of the compression pressure spring compressed by the movable sleeve can be adjusted by adjusting the ground water injection pressure, so that the water injection quantity is adjusted.
As shown in figure 5, a hydraulic pipe 1 in a packer main body 4 is inserted into a hydraulic control pipeline, an upper joint of the packer is in threaded connection with an oil pipe, an upper positioning sleeve is fixed on the joint through a screw, a lower positioning sleeve is also fixed on the joint through a screw, and the two positioning sleeves play a role in positioning and fixing the packer together. The packing element 5 and the piston 6 are arranged outside the packer main body 4, the cylinder sleeve 8 is sleeved outside the two pistons, and the sealing plug 7 plugs the hole to prevent liquid leakage. The lower joint of the packer is fixed on the packer main body by a screw and is connected with an oil pipe. When the hydraulic setting machine works, the hydraulic pipeline is used for pressing, the two pistons are pushed to move upwards and downwards respectively, the two rubber cylinders are compressed, and the rubber cylinders are compressed and set. And (4) releasing the pressure of the hydraulic pipeline, recovering the rubber cylinder and unsealing the rubber cylinder.
1. The separated layer water injection pipe column comprises 6 water injection channels, each water injection channel is independent, the section of each water injection channel is shown in figure 2, and each water injection channel comprises 5 water distribution pipes, a central channel and a hydraulic control pipeline channel.
2. The injected water of each interval enters each water injection interval through the water injection channels and the multi-pipe separate-layer water injection safety valves 101 and 5 multi-pipe water distributors respectively. Each water injection layer is provided with a respective independent multi-pipe water distributor.
3. Each injection zone is sealed by a multi-tubular packer 104 which can be pressure controlled set by hydraulic control line 6.
4. The 1 multitube separated layer water injection safety valve and the safety packer 102 can guarantee production safety, and a water injection channel can be automatically cut off under the condition of overlarge underground pressure, so that dangerous conditions such as blowout and the like are avoided. The water injection string is positioned by the positioning joint 103 and inserted into the conventional sand control string 107.
5. Each water injection channel is provided with a pressure gauge and a flow measuring device on the ground, so that real-time monitoring and real-time adjustment can be performed during actual production, and regular well shut-in and measurement and adjustment are not needed.
The invention can meet the requirement of a water injection well with less than 6 layers in a layering way, can monitor the pressure and water quantity of each water injection layer section in real time, and does not need to be measured and adjusted regularly. The separated layer water injection pipe column comprises 6 water injection channels, each water injection channel is independent, and each water injection channel is provided with a water distributor. The wellhead of each water injection channel is provided with a water meter and a pressure gauge, and the injected water of each layer enters the water injection layer section from the water injection channel which is independent of each other through the multi-pipe separated layer water injection safety valve 101 and the multi-pipe water distributor 105. Multiple packers 104 are used to stratify between intervals. In order to ensure production safety and well control requirements, a multi-pipe separate layer water injection safety valve 101 and a safety packer 102 are arranged, and a water injection channel can be automatically closed when underground pressure is too high, so that well blowout is avoided. The conventional sand control string 107 may prevent plugging of the water distributor due to formation sand production.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, but rather should be construed in all respects as illustrative and not restrictive.
Claims (7)
1. A multi-pipe separate-layer water injection pipe column for an oil field comprises an oil pipe and a sand control pipe column, wherein a safety packer and a water distributor are sequentially arranged on the oil pipe from top to bottom, the sand control pipe column is sleeved outside the oil pipe and is provided with a sieve pipe communicated with each water injection layer, the upper end of the sand control pipe column is provided with a positioning joint, the positioning joint is positioned below the safety packer, the bottom of the sand control pipe column is provided with a plug, the oil pipe is provided with interlayer packers, the interlayer packers are positioned between every two water injection layers, the oil pipe is further provided with a multi-pipe separate-layer water injection safety valve, the multi-pipe separate-layer water injection safety valve is positioned above the safety packer, the water distributor is a multi-pipe water distributor, the number of the multi-pipe water distributors is less than that of the water injection layers, namely the multi-pipe water distributors are, the interlayer packer is a multi-pipe packer; the multi-pipe stratified water injection safety valve comprises a safety valve outer pipe, an upper sealing sleeve, a lower sealing sleeve, a safety valve water distribution pipe and a connecting pipe, wherein the upper sealing sleeve and the lower sealing sleeve are sequentially assembled inside the safety valve outer pipe from top to bottom; the middle-through one-way flow mechanism comprises a large pressure spring, a large steel ball and a switch sleeve which are connected, wherein the upper end of the large pressure spring is clamped on a ring table arranged in a central hole of an upper seal sleeve, the lower end of the large steel ball is propped against a port of the switch sleeve, the lower end of the switch sleeve is fixed in the central hole of a lower seal sleeve, and the outer wall of the switch sleeve, which is close to the upper port, is provided with a radial side through hole; the water diversion unidirectional flow mechanism comprises a small steel ball and a small pressure spring which are connected, wherein the small pressure spring presses and seals the small steel ball at the lower port of the connecting pipe; the upper and lower sealing sleeves are provided with hydraulic control pipeline channels for passing through hydraulic control pipelines; the upper end and the lower end of the outer pipe are respectively connected with an oil pipe through an upper joint and a lower joint.
2. The oilfield multi-tube layered water injection string according to claim 1, wherein the multi-tube water distributor comprises a water distributor diversion tube, a water distributor main body, a water distributor sealing sleeve, a movable sleeve, a water distributor compression spring, an adjusting sleeve and a fixing sleeve, the water distributor sealing sleeve is arranged inside the water distributor main body, the water distributor sealing sleeve is provided with a blind hole, a central hole and four diversion holes, the upper end and the lower end of the water distributor main body are connected with oil tubes, the movable sleeve is sleeved outside the water distributor main body, the water distributor main body is provided with radial holes, the radial holes enable inner cavities of the movable sleeve to be communicated with the blind hole, an upper port of the blind hole is communicated with the water distributor diversion tube, and the upper end of the water distributor diversion tube is communicated with one of safety valve diversion.
3. The oilfield multi-tube layered water injection string according to claim 2, wherein the oil tube is provided with a fixed sleeve, the fixed sleeve is externally connected with an adjusting sleeve, and a water distributor pressure spring is arranged between the upper end surface of the adjusting sleeve and the lower end surface of the movable sleeve.
4. The oilfield multi-pipe layered water injection string according to claim 1, wherein the multi-pipe packer comprises a hydraulic pipe, a packer shunt pipe, a packer main body, a packing element, a piston and a cylinder sleeve, the piston and the packing element are sleeved outside the packer main body, the piston is located in the cylinder sleeve, one end of the piston abuts against the end of the packing element, the packer main body is provided with a radial hole, the radial hole enables an inner cavity of the cylinder sleeve to be communicated with the axial hydraulic pipe arranged on the packer main body, the packer main body is further provided with a central hole and five shunt holes in the axial direction, the five shunt holes are communicated with the five packer shunt pipes, and the packer shunt pipes are communicated with the safety valve pipes.
5. The oilfield multi-tubular zonal injection string of claim 4, wherein the cylinder liner is provided with a sealing bore for receiving a sealing plug, the sealing plug being aligned with a radial bore provided in the packer body.
6. The oilfield multi-tube zonal injection string according to claim 4, wherein the upper end of the packer body is connected with an upper outer tube of the packer, an upper joint of the packer is arranged inside the upper outer tube of the packer, the upper joint of the packer is connected with an oil tube, the lower end of the packer body is connected with a lower outer tube of the packer, a lower joint of the packer is arranged inside the lower outer tube of the packer, and the lower joint of the packer is connected with the oil tube.
7. The oilfield multi-pipe zonal injection string of claim 6, wherein the packer upper sub is connected with the upper positioning sleeve by a screw, the upper positioning sleeve is positioned inside the packer upper outer pipe, the packer lower sub is connected with the lower positioning sleeve by a screw, and the lower positioning sleeve is positioned inside the packer lower outer pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710967681.2A CN109681159B (en) | 2017-10-17 | 2017-10-17 | Oil field multitube layering water injection string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710967681.2A CN109681159B (en) | 2017-10-17 | 2017-10-17 | Oil field multitube layering water injection string |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109681159A CN109681159A (en) | 2019-04-26 |
| CN109681159B true CN109681159B (en) | 2021-02-02 |
Family
ID=66183745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710967681.2A Active CN109681159B (en) | 2017-10-17 | 2017-10-17 | Oil field multitube layering water injection string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109681159B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112709556B (en) * | 2019-10-24 | 2022-12-06 | 中国石油化工股份有限公司 | Rapid well completion pipe string for offshore oilfield water injection well and construction method |
| CN112709557B (en) * | 2019-10-24 | 2022-12-06 | 中国石油化工股份有限公司 | Safe and long-acting water injection string for offshore oil field and construction method |
| CN110984934A (en) * | 2020-01-10 | 2020-04-10 | 宋协翠 | Application method of hydraulic control measuring and adjusting integrated device for polymer injection well |
| CN111706306B (en) * | 2020-07-22 | 2024-05-24 | 沈阳华威石油机械制造有限公司 | Three-pipe concentric layered water injection pipe column |
| CN113175312B (en) * | 2021-06-09 | 2022-04-15 | 大庆丹枫石油技术开发有限公司 | Multilayer quantitative water injection water distributor |
| CN113803033B (en) * | 2021-09-18 | 2023-05-09 | 西安洛科电子科技股份有限公司 | Tubular column regulating and controlling device for intelligent separate-layer water injection and using method thereof |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2973039A (en) * | 1956-11-02 | 1961-02-28 | Richfield Oil Corp | Multiple zone fluid circulating apparatus |
| US6279660B1 (en) * | 1999-08-05 | 2001-08-28 | Cidra Corporation | Apparatus for optimizing production of multi-phase fluid |
| CN1538034A (en) * | 2003-10-23 | 2004-10-20 | 中国石化胜利油田有限公司采油工艺研 | Well washing method of hierarchical water injection well and its underwell tubular column |
| CN202157784U (en) * | 2011-07-08 | 2012-03-07 | 中国石油天然气股份有限公司 | Underground check valve |
| CN202832382U (en) * | 2012-08-20 | 2013-03-27 | 中国海洋石油总公司 | Safety valve of ground hydraulic control water injection well |
| CN204419141U (en) * | 2015-01-06 | 2015-06-24 | 青岛瑞信石油设备制造有限公司 | A kind of selective sand control is surveyed and is adjusted one separate layer water injection string |
| CN204511401U (en) * | 2015-03-23 | 2015-07-29 | 青岛瑞信石油设备制造有限公司 | A kind of Intelligent testing adjusts selective sand control separate layer water injection string |
| CN105422063A (en) * | 2015-12-22 | 2016-03-23 | 付吉平 | Self-locking reverse-spitting-prevention bridge-type concentric adjustable water regulator for separate-layer injection well |
| CN105507861A (en) * | 2016-01-06 | 2016-04-20 | 李永立 | Tubular column for separated layer water injection |
| CN205503110U (en) * | 2016-04-01 | 2016-08-24 | 施明华 | Offshore oil field layering water injection string |
| CN106988712A (en) * | 2017-06-09 | 2017-07-28 | 上海飞舟博源石油装备技术有限公司 | Single tube post multitube separated-zone water infection oil field device and its water filling and anti-flushing well method |
| CN107246256A (en) * | 2017-07-28 | 2017-10-13 | 沈阳华威石油机械制造有限公司 | A kind of special-shaped coiled tubing beam ground distributor injection system |
-
2017
- 2017-10-17 CN CN201710967681.2A patent/CN109681159B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2973039A (en) * | 1956-11-02 | 1961-02-28 | Richfield Oil Corp | Multiple zone fluid circulating apparatus |
| US6279660B1 (en) * | 1999-08-05 | 2001-08-28 | Cidra Corporation | Apparatus for optimizing production of multi-phase fluid |
| CN1538034A (en) * | 2003-10-23 | 2004-10-20 | 中国石化胜利油田有限公司采油工艺研 | Well washing method of hierarchical water injection well and its underwell tubular column |
| CN202157784U (en) * | 2011-07-08 | 2012-03-07 | 中国石油天然气股份有限公司 | Underground check valve |
| CN202832382U (en) * | 2012-08-20 | 2013-03-27 | 中国海洋石油总公司 | Safety valve of ground hydraulic control water injection well |
| CN204419141U (en) * | 2015-01-06 | 2015-06-24 | 青岛瑞信石油设备制造有限公司 | A kind of selective sand control is surveyed and is adjusted one separate layer water injection string |
| CN204511401U (en) * | 2015-03-23 | 2015-07-29 | 青岛瑞信石油设备制造有限公司 | A kind of Intelligent testing adjusts selective sand control separate layer water injection string |
| CN105422063A (en) * | 2015-12-22 | 2016-03-23 | 付吉平 | Self-locking reverse-spitting-prevention bridge-type concentric adjustable water regulator for separate-layer injection well |
| CN105507861A (en) * | 2016-01-06 | 2016-04-20 | 李永立 | Tubular column for separated layer water injection |
| CN205503110U (en) * | 2016-04-01 | 2016-08-24 | 施明华 | Offshore oil field layering water injection string |
| CN106988712A (en) * | 2017-06-09 | 2017-07-28 | 上海飞舟博源石油装备技术有限公司 | Single tube post multitube separated-zone water infection oil field device and its water filling and anti-flushing well method |
| CN107246256A (en) * | 2017-07-28 | 2017-10-13 | 沈阳华威石油机械制造有限公司 | A kind of special-shaped coiled tubing beam ground distributor injection system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109681159A (en) | 2019-04-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109681159B (en) | Oil field multitube layering water injection string | |
| CN109184638B (en) | Intelligent pressure wave code layered water injection system and process method for water injection well | |
| CN110107251B (en) | Fracturing filling conversion tool | |
| CN109763799B (en) | Method for controlling separated layer water injection by using flow wave | |
| CN110195578B (en) | Separate layer water injection system of small cased well | |
| CN102200000B (en) | Blowout preventing box of continuous oil pipe and drill rod | |
| CN107916910B (en) | Independent hydraulic control packer pressure control valve | |
| CN108386155B (en) | Double-eccentric integrated packer for water injection well of oil field | |
| CN107701147A (en) | A kind of annular pressure downhole control valve | |
| CN206111126U (en) | Close inserting of independent liquid accuse sliding sleeve formula | |
| CN109707327A (en) | Concentric double-tube separate injection pressurized operation string | |
| CN107842346B (en) | Sealed working barrel in composite type insertion pipe of oil-water well | |
| CN111485849B (en) | Casing hydraulic packer | |
| CN109779583B (en) | Constant-flow water distribution equipment and method | |
| CN103541700A (en) | Reverse seal type eccentric water distributor | |
| CN103670323B (en) | Leakiness stratum completion system | |
| CN209892121U (en) | Concentric double-tube separate injection pressurized operation string | |
| CN207348825U (en) | A kind of oil field multitube seperated layer water injection safety valve | |
| CN110821460B (en) | Drillable separated layer water injection process pipe column | |
| US11982166B2 (en) | System for segmented simultaneous water injection and oil recovery through double pipes in horizontal section | |
| CN206158663U (en) | Minor diameter double -piston ground liquid accuse compression packer | |
| CN201771467U (en) | Under-balance well completion tool | |
| CN111894559B (en) | Inner channel decompression restrictor | |
| CN108397185B (en) | Quick test tube post of cable layering | |
| RU2563845C2 (en) | Sealing method of cavity of pipes and annular space of well; pgu-2 anti-syphonage sealing device; pk-1 washing coil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |