CN113431509A - Cambered surface type sucker rod centralizer and preparation method thereof - Google Patents
Cambered surface type sucker rod centralizer and preparation method thereof Download PDFInfo
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- CN113431509A CN113431509A CN202110687221.0A CN202110687221A CN113431509A CN 113431509 A CN113431509 A CN 113431509A CN 202110687221 A CN202110687221 A CN 202110687221A CN 113431509 A CN113431509 A CN 113431509A
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- sucker rod
- abrasion
- fixer
- sawtooth
- centralizing
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- 238000002360 preparation method Methods 0.000 title abstract description 5
- 238000005299 abrasion Methods 0.000 claims abstract description 83
- 238000005086 pumping Methods 0.000 claims abstract description 58
- 239000000463 material Substances 0.000 claims description 21
- 238000005266 casting Methods 0.000 claims description 16
- 239000002861 polymer material Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 240000007643 Phytolacca americana Species 0.000 claims description 4
- 210000004177 elastic tissue Anatomy 0.000 claims description 4
- 239000002657 fibrous material Substances 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 abstract description 9
- 238000010168 coupling process Methods 0.000 abstract description 9
- 238000005859 coupling reaction Methods 0.000 abstract description 9
- 230000009471 action Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 24
- 239000003129 oil well Substances 0.000 description 13
- 240000007817 Olea europaea Species 0.000 description 5
- 238000005452 bending Methods 0.000 description 5
- 230000002265 prevention Effects 0.000 description 5
- 238000007790 scraping Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1071—Wear protectors; Centralising devices, e.g. stabilisers specially adapted for pump rods, e.g. sucker rods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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- Life Sciences & Earth Sciences (AREA)
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- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a cambered surface type sucker rod centralizer and a preparation method thereof. The inner end surface of the fixer is provided with a sawtooth-shaped poking tooth fixed on the sucker rod body, the anti-abrasion centralizing body is sleeved between two adjacent fixers, the circumferential side of the anti-abrasion centralizing body is provided with a plurality of spiral bosses and overflowing grooves, the overflowing grooves between the two spiral bosses are used as oil flowing channels, the outer circle of the centralizing body is in a cambered surface shape, two end surfaces are provided with sawtooth-shaped gear wheels, and the sawtooth-shaped gear wheels of the anti-abrasion centralizing body are mutually meshed with the sawtooth-shaped poking tooth of the fixer. Compared with the prior art, when the pumping well does work, the anti-abrasion centering body can rotate automatically in the pumping well under the action of the serrated shifting teeth of the fixer, so that the eccentric wear of a coupling of the pumping rod can be prevented, the eccentric wear of a body of the pumping rod can be prevented, the anti-abrasion centering body can be prevented, the pumping rod can be prevented from tripping, breaking and falling, and meanwhile, the wax can be scraped.
Description
Technical Field
The invention belongs to pumping oil extraction equipment of a sucker rod pump in an oil field, belongs to the technical field of eccentric wear prevention, and relates to a cambered surface type sucker rod centralizer and a preparation method thereof.
Background
In the existing pumping process of the sucker-rod pump in the oil field, a plurality of tools for preventing eccentric wear are provided, and only a few tools are better. Such as a clamp type sucker rod centralizer, a columnar sucker rod centralizer and a spiral fixed type sucker rod anti-eccentric wear device. They have the functions of righting the sucker rod and preventing the sucker rod from eccentric wear. Meanwhile, some outstanding problems exist; 1) Clamp formula sucker rod centralizer: the sucker rod can be centered, the abrasion of the sucker rod and a pumping well pipe is reduced, but the centering device consists of two half centering bodies, and the centering device is embedded with the sucker rod by utilizing the lacing wire with the R =0.5 mm of the centering device, and is sleeved on the sucker rod manually during use. There are three more significant problems with this arrangement; the first is that the centralizing body is connected with the sucker rod, and the two half centralizing bodies are mutually embedded by utilizing the buckles and the clamping grooves of the centralizing bodies and are sleeved on the sucker rod. When the sucker rod produces the eccentric wear, will right the buckle of body, draw-in groove wearing and tearing, right the body and drop easily, cause the major accident of card well. And secondly, because the centralizing body is connected with the sucker rod, the centralizing body is sleeved and embedded with the sucker rod by utilizing the lacing wires in the centralizing body, so that the axial locking force of the centralizing body and the sucker rod is small. When the sucker rod is used, the centering body is easy to loosen and move on the sucker rod due to the friction force in the sucker rod and the temperature change in the well, and the function of eccentric wear prevention is ineffective. Thirdly, the installation is difficult; the clamp type sucker rod centralizer is sleeved on a sucker rod after an operator heats the centralizer with boiled water on site, and the inner diameter of the centralizer is difficult to be matched with the outer diameter of the sucker rod, so that the installation is difficult. 2) Columnar sucker rod centralizer: the centralizer has the following defect that the centralizer can only be arranged on screw threads of couplings at two ends of a sucker rod. Firstly, can only slow down the wearing and tearing of sucker rod coupling, can not right, the abrasionproof to the sucker rod body middle part that length is 9 meters, play not prevent the eccentric wear effect. And secondly, the guide teeth of the columnar centralizer are bonded by glue, so that the guide teeth are easy to damage and fall off due to high underground temperature, and well clamping accidents are caused. Thirdly, the stress of the steel joint is inconsistent with that of the sucker rod, so that the steel joint is easy to break to cause well lying accidents. Fourthly, the steel joint has large straight diameter, limits the size of the centralizing body, has limited cross section area of a flowing oil channel and large resistance, increases the load of the oil pumping unit, influences the liquid production amount of an oil well, and has no wax scraping function. 3) This case inventor has fixed sucker rod of spiral type before and prevents eccentric wear ware patent, through the many years result of use of oil field prove, can right the sucker rod, prevent that the eccentric wear effect in the middle of sucker rod coupling and the sucker rod body is showing, but its problem that exists is: the eccentric wear prevention device is firmly fixed on the sucker rod body, when the eccentric wear of an oil well is serious, the eccentric wear prevention device can generate eccentric wear, and the service life of the eccentric wear prevention device is shortened.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a cambered surface type sucker rod centralizer, which can prevent eccentric wear of a sucker rod coupling and a sucker rod body, can prevent an anti-abrasion centralizing body from eccentric wear, can prevent the sucker rod from being broken and falling off, can enable the anti-abrasion centralizing body to rotate, and has the functions of scraping wax and preventing the sucker rod from tripping.
The invention also aims to provide a preparation method of the cambered surface type sucker rod centralizer.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the utility model provides a cambered surface formula sucker rod centralizer, including installing fixer and the body is right to abrasionproof on each section sucker rod body, its characterized in that: the number of the fixing devices is 2, the fixing devices are respectively fixed on the sucker rod body, and the anti-abrasion centralizing body is sleeved on the sucker rod body between two adjacent fixing devices; the circumferential side of the anti-abrasion centralizing body is provided with a plurality of spiral bosses and overflowing grooves, the overflowing groove between the two spiral bosses is used as an oil flowing channel, and the outer circle of the anti-abrasion centralizing body is arc-surface-shaped or cylindrical; the upper end part and the lower end part of the anti-abrasion centralizing body are respectively provided with a sawtooth-shaped gear wheel, the inner sides of the two fixers are respectively provided with a sawtooth-shaped poking tooth, the sawtooth-shaped poking teeth of the upper fixer and the lower fixer are arranged in the circumferential direction and staggered at an angle of 1/5-4/5 teeth, the sawtooth-shaped poking teeth of the fixers can be matched with the sawtooth-shaped gear wheels on the corresponding sides of the anti-abrasion centralizing body to poke the anti-abrasion centralizing body to rotate, when the pumping unit does work, the sucker rod body moves upwards to poke the sawtooth-shaped poking teeth, and the sawtooth-shaped poking teeth on the fixer at the lower side push the sawtooth-shaped gear wheel at the lower end of the anti-abrasion centralizing body in the upwards moving process, so that the anti-abrasion centralizing body axially rotates along the sucker rod body in the pumping well pipe and moves upwards; when the sucker rod body moves downwards, the sawtooth-shaped shifting teeth on the upper fixer move downwards to push the sawtooth-shaped gear at the upper end of the anti-abrasion centralizing body, so that the anti-abrasion centralizing body continues to rotate in the same direction along the axial direction of the sucker rod body in the pumping well pipe and moves downwards.
Preferably, the arrangement of the serrated pick teeth of the upper and lower anchors is offset in the circumferential direction by 1/2 teeth.
Preferably, the directions of the inclined planes of the upper end part serrated roller cone and the lower end part serrated roller cone of the anti-abrasion centralizing body are arranged in a reverse direction; the sawtooth-shaped shifting teeth of the upper fixer and the lower fixer are matched with the sawtooth-shaped gear wheels corresponding to the anti-abrasion centralizing body.
Preferably, the directions of the inclined planes of the upper end part serrated roller cone and the lower end part serrated roller cone of the anti-abrasion centralizing body are arranged in the same direction; the sawtooth-shaped shifting teeth of the upper fixer and the lower fixer are matched with the sawtooth-shaped gear wheels corresponding to the anti-abrasion centralizing body.
Preferably, the fixer is divided into an inner layer and an outer layer, the inner layer is a flexible material tightly wound on the sucker rod body, and the outer layer is a high polymer material which is cast and wraps the inner layer.
Preferably, the fixer is divided into an inner layer and an outer layer, the inner layer is made of multiple layers of elastic fiber materials, a strapping layer for strapping the inner layer is further arranged between the inner layer of the fixer and the outer layer of the fixer, and the outer layer is made of a high polymer material which is cast and wraps the strapping layer.
Preferably, the strapping layer is formed by winding a wire, a ribbon or a rope material on the surface of the multiple layers of elastic fiber materials.
Preferably, the spiral boss and the overflow groove are in a spiral shape or a straight rib shape.
The manufacturing method of the cambered surface type sucker rod centralizer is characterized by comprising the following steps:
(1) casting to form a fastener having an inner and an outer structure
Designing the position of a fixer on a sucker rod body according to a proper distance, winding a flexible material at the position of the fixer to form an inner layer, binding the flexible material on the sucker rod body by a binding layer, casting the fixer on the outer layer of the tightly bound flexible material by a high polymer material, and fixing the fixer on the sucker rod body to form the fixer with serrated shifting teeth of inner and outer layer structures;
(2) casting anti-wear centralizing body
The sucker rod body between the two fixers is coated with a soluble coating, the coating is cast by a high polymer material to form an anti-abrasion centralizing body, and saw-toothed gear wheels are cast on the two end surfaces of the anti-abrasion centralizing body;
preferably, in step (1) the adhesive is added as the flexible material is wound to form the inner layer of the anchor.
Adopt above-mentioned technical scheme's beneficial effect: the invention relates to a cambered surface type sucker rod centralizer, which is formed by taking a sucker rod as a main body and installing a fixer and an anti-abrasion centralizer at a required position of a sucker rod body. Because the fixer is through the firm connection of casting on the sucker rod body, the body is right to the abrasionproof suit between two adjacent fixers to can remove, rotate in the position that the sucker rod body needs, the distance of removing is looked the interval of two fixers and is confirmed.
In the manufacturing method of the cambered surface type sucker rod centralizer, the flexible material for casting of the fixator is wound at the position of the fixator to form an inner layer, the flexible material is bound on the sucker rod body through the binding layer, then the binding layer is used for casting the high polymer material on the outer layer of the bound flexible material, the fixator is firmly fixed with the sucker rod body, the axial locking force of the fixator can reach 14-16 KN at normal temperature, the axial locking force can reach 6KN after heating (70 ℃), and the fixator cannot move in use.
When the anti-abrasion centralizing body is cast, a layer of soluble coating is coated on the sucker rod body, and a high polymer material is cast outside the coating to prepare the anti-abrasion centralizing body. When the anti-abrasion centralizing body is used, when the bent well section of the pumping well is eccentric-abraded, the anti-abrasion centralizing body on the pumping well rod and the inner wall of the pumping well pipe produce friction, the anti-abrasion centralizing body can move up and down between the two fixers on the pumping well rod body, and due to the action of the serrated poking teeth on the fixers and the serrated roller on the anti-abrasion centralizing body, the purpose that the anti-abrasion centralizing body rotates along the pumping well rod body is achieved, and the eccentric abrasion of the anti-abrasion centralizing body is avoided. The design of the sawtooth-shaped gear wheels on the two end surfaces of the anti-abrasion righting body and the sawtooth-shaped shifting teeth on the inner end surface of the fixer and the structural design of adopting the cambered surface spiral boss or the cambered surface straight rib boss on the cylindrical surface of the outer edge of the anti-abrasion righting body have the following advantages: 1. when the oil well does work, the anti-abrasion centering body can rotate in the oil well, the eccentric wear of the anti-abrasion centering body is slowed down or avoided, and the pump checking period of the oil well is prolonged. 2. The anti-abrasion centralizing body is in uniform cylindrical surface contact with the inner wall of the pumping well pipe, the line contact mode of the product in the prior art is changed, and the eccentric wear of the pumping rod, the anti-abrasion centralizing body and the pumping well pipe is slowed down or avoided. 3. In the well section with large eccentric wear in the oil well, because the excircle of the centralizing body adopts the cambered surface design (olive shape), the anti-abrasion centralizing body can correspondingly change the angle under the action of the sucker rod, and the sucker rod is prevented from being broken. 4. The cambered surface spiral boss is in contact with a cylindrical surface formed by the inner wall of the pumping well pipe relative to the inner wall of the pumping well pipe, so that wax crystals on the inner wall of the pumping well pipe cannot be crystallized when the anti-abrasion centralizing body moves in the pumping well pipe, and the multiple functions of centralizing a pumping rod and the pumping well pipe, preventing eccentric abrasion and scraping wax are achieved. 5. The fixer is together with the firm casting of sucker rod, therefore the abrasionproof body of righting can only remove, rotate in the within range of setting for between the fixer, can not cause the fixer to shift, move, can not drop oil well yet, causes the card well accident.
Due to the design of the cambered surface spiral boss, the centering body is changed into the existing cambered surface (olive shape) from the original cylindrical surface, the sectional area of a flowing oil channel of the anti-abrasion centering body is increased, the flowing of produced oil of an oil well is smooth, the length of the boss at the outer edge of the centering body is reasonably changed, the well mouth is effectively prevented from being collided when the centering body is put into the well, the friction force between the anti-abrasion centering body and an oil pumping well pipe is reduced, and the load of the oil pumping unit is lightened.
For the oil well with serious eccentric wear caused by the reasons of large inclination of the oil well, setting influence and the like, the invention effectively prevents the eccentric wear of the sucker rod coupling and the sucker rod body relative to the inner wall of the pumping well pipe by the centering of the plurality of anti-wear centering bodies on the sucker rod, solves the eccentric wear of the sucker rod coupling and the sucker rod body, and also solves the eccentric wear of the anti-wear centering bodies.
Compared with the prior art, the anti-abrasion oil pumping rod solves the problems of eccentric wear of the coupling of the oil pumping rod, the body of the oil pumping rod and the anti-abrasion centralizing body and fracture of the oil pumping rod in pumping oil extraction process equipment of the oil field rod pumping. The purpose of preventing eccentric wear and scraping wax is achieved, the pump inspection period of the oil well is prolonged, the maintenance operation well frequency is reduced, the service lives of the sucker rod and the pumping well pipe are prolonged, the labor intensity of workers is reduced, the liquid production capacity of the oil well is improved, the oil extraction cost is reduced, and the manufacture is convenient.
Drawings
FIG. 1 is a schematic diagram of the structure of the wear centralizers and serrated cones of the present invention.
Fig. 2 is a top view of the schematic structure of the present invention shown in fig. 1.
Fig. 3 is a schematic view of the structure of the present invention shown in fig. 1 in a use state.
Fig. 4 is a plan view schematically showing a use state shown in fig. 3.
FIG. 5 is a schematic view of the fastener and serrated teeth of the present invention.
Fig. 6 is a left side view of the lower anchor structure of the present invention shown in fig. 5.
Fig. 7 is a right side view of the upper anchor structure of the present invention shown in fig. 5.
In the figure, 1, an anti-abrasion centralizing body, 2, an overflow groove, 3, a centralizing body spiral boss, 4, a centralizing body lower sawtooth gear wheel, 5, a centralizing body upper sawtooth gear wheel, 6, an upper fixer sawtooth shifting tooth, 7, an upper fixer, 8, a lower fixer, 9, a lower fixer sawtooth shifting tooth, 10, a sucker rod body, 11 an oil pumping well pipe, 12, a centralizing body cambered surface and 13, a sucker rod screw joint.
Detailed Description
As shown in fig. 3, the upper fixer 7 and the upper fixer sawtooth poking tooth 6, the lower fixer 8 and the lower fixer sawtooth poking tooth 9 are made by casting polymer materials at the required positions of the sucker rod body 10, and then the same materials are used between the two adjacent upper fixer 7 and the lower fixer 8 on the sucker rod body 10, the upper anti-abrasion centralizing body 1 is cast, the anti-abrasion centralizing body 1 is movable, and the cambered surface type sucker rod centralizer which integrates the upper fixer 7, the lower fixer 8 and the anti-abrasion centralizing body 1 is formed by casting by taking the sucker rod body 10 as the center.
As shown in fig. 1 and 2, the arc surface of the outer circumference of the anti-wear righting body 1 is provided with a plurality of spiral bosses 3, a righting body overflow groove (spiral groove) 2 is arranged between two adjacent spiral bosses 3 to serve as an oil flowing channel, and the outer circle of the anti-wear righting body 1 is made into a righting body arc surface 12 (olive shape).
In the prior art, the columnar centralizer is arranged on a bent well section of an oil well, and the excircle of the centralizing body is cylindrical and is arranged on a screw thread joint 13 of a sucker rod. When the pumping unit operates, the sucker rod body 10 also operates in the pumping well pipe 11, and because the two ends of the columnar centralizer obstruct the sucker rod body 10 from naturally bending, the local part of the sucker rod body 10 generates stress, thereby causing serious accidents of breaking the sucker rod body 10 and the columnar centralizer.
The invention aims to overcome the defects of the columnar centralizer and the like, so that the anti-abrasion centralizer 1 can move on the sucker rod body 10 between the two adjacent upper fixers 7 and lower fixers 8, and the excircle of the anti-abrasion centralizer 1 is an arc surface. When the sucker rod body 10 operates in a reciprocating mode in a well section with a large bending angle of a pumping well, the anti-abrasion centralizing body 1 can change the angle of the anti-abrasion centralizing body 1 along with the angle change of the bending well section, the stress generated by the local part of the sucker rod body 10 is eliminated, when the well section with the large bending angle of the anti-abrasion centralizing body 1 in the pumping well pipe 11 is obstructed, the sucker rod body 10 can also move between the upper fixer 7 and the lower fixer 8 of the anti-abrasion centralizing body 1, the stress generated by the sucker rod body 10 due to the large bending angle of the pumping well pipe is eliminated, and the serious accident that the sucker rod body 10 is broken is avoided.
Because the excircle of the anti-abrasion centralizing body 1 is an arc surface (olive shape), when the pumping unit works, when the pumping unit operates, the contact surface of the sucker rod body 10 and the inner wall of the pumping well pipe 11 is reduced when the sucker rod body reciprocates in the pumping well pipe 11, and the friction force of the anti-abrasion centralizing body 1 relative to the movement of the inner wall of the pumping well pipe 11 is reduced, so that the load of the pumping unit is lightened. Because the excircle of the anti-abrasion centralizing body 1 is an arc surface (olive shape), the outer circle can smoothly enter the mouth of a pumping well and enter the pumping well pipe 11 during operation.
The righting body spiral boss 3 on the outer circular arc molded surface of the anti-abrasion righting body 1, the righting body overflow groove (oil flow channel) 2 adopts a spiral design, and the righting body spiral boss 3 is in surface contact with the inner wall of the oil pumping well pipe 11. Because the maximum stroke of the operation of the oil pumping unit is 4.5 meters, and the distance between the anti-abrasion righting body 1 and the other anti-abrasion righting body is less than 4 meters. When the sucker rod body 10 reciprocates in the pumping well pipe 11, the spiral boss 3 of the centralizing body on the outer circular arc surface of the anti-abrasion centralizing body 1 rubs the inner wall of the pumping well pipe 11, so that wax crystals in crude oil in a well are scraped by the anti-abrasion centralizing body 1 in the pumping well pipe 11, and the purpose of scraping wax is achieved. Meanwhile, the purpose of preventing the sucker rod coupling and the sucker rod body 10 from being abraded is achieved, the upper fixing device 7 and the lower fixing device 8 are prevented from shifting, moving and falling off, and the multifunctional sucker rod can scrape wax. And the flow groove 2 (oil flow channel) of the centralizing body is enlarged, and the liquid flows smoothly.
The manufacturing method of the cambered surface type sucker rod centralizer is characterized by comprising the following steps:
the manufacturing method of the cambered surface type sucker rod centralizer is characterized in that:
the method comprises the following steps:
(1) casting to form a fastener having an inner and an outer structure
Designing the position of a fixer on a sucker rod body according to a proper distance, winding a flexible material at the position of the fixer to form an inner layer, binding the flexible material on the sucker rod body by a binding layer, casting the fixer on the outer layer of the tightly bound flexible material by a high polymer material, and fixing the fixer on the sucker rod body to form the fixer with serrated shifting teeth of inner and outer layer structures; an adhesive may be added as the flexible material is wound to form the inner layer of the anchor;
(2) casting anti-wear centralizing body
The sucker rod body between the two fixers is coated with a soluble coating, the coating is cast by a high polymer material to form an anti-abrasion centralizing body, and sawtooth-shaped gear wheels are cast on the two end faces of the anti-abrasion centralizing body.
Although embodiments of the present invention have been described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a cambered surface formula sucker rod centralizer, including installing fixer and the body is right to abrasionproof on each section sucker rod body, its characterized in that: the number of the fixing devices is 2, the fixing devices are respectively fixed on the sucker rod body, and the anti-abrasion centralizing body is sleeved on the sucker rod body between two adjacent fixing devices; the circumferential side of the anti-abrasion centralizing body is provided with a plurality of spiral bosses and overflowing grooves, the overflowing groove between the two spiral bosses is used as an oil flowing channel, and the outer circle of the anti-abrasion centralizing body is arc-surface-shaped or cylindrical; the upper end part and the lower end part of the anti-abrasion centralizing body are respectively provided with a sawtooth-shaped gear wheel, the inner sides of the two fixers are respectively provided with a sawtooth-shaped poking tooth, the sawtooth-shaped poking teeth of the upper fixer and the lower fixer are arranged in the circumferential direction and staggered at an angle of 1/5-4/5 teeth, the sawtooth-shaped poking teeth of the fixers can be matched with the sawtooth-shaped gear wheels on the corresponding sides of the anti-abrasion centralizing body to poke the anti-abrasion centralizing body to rotate, when the pumping unit does work, the sucker rod body moves upwards to poke the sawtooth-shaped poking teeth, and the sawtooth-shaped poking teeth on the fixer at the lower side push the sawtooth-shaped gear wheel at the lower end of the anti-abrasion centralizing body in the upwards moving process, so that the anti-abrasion centralizing body axially rotates along the sucker rod body in the pumping well pipe and moves upwards; when the sucker rod body moves downwards, the sawtooth-shaped shifting teeth on the upper fixer move downwards to push the sawtooth-shaped gear at the upper end of the anti-abrasion centralizing body, so that the anti-abrasion centralizing body continues to rotate in the same direction along the axial direction of the sucker rod body in the pumping well pipe and moves downwards.
2. The cambered surface sucker rod centralizer of claim 1, characterized in that: the arrangement of the serrated pick teeth of the upper and lower anchors is offset in the circumferential direction by 1/2 teeth.
3. The cambered surface sucker rod centralizer of claim 1, characterized in that: the directions of the inclined planes of the upper end part serrated roller cone and the lower end part serrated roller cone of the anti-abrasion centralizing body are arranged in a reverse direction; the sawtooth-shaped shifting teeth of the upper fixer and the lower fixer are matched with the sawtooth-shaped gear wheels corresponding to the anti-abrasion centralizing body.
4. The cambered surface sucker rod centralizer of claim 1, characterized in that: the directions of the inclined planes of the upper end part serrated roller cone and the lower end part serrated roller cone of the anti-abrasion centralizing body are arranged in the same direction; the sawtooth-shaped shifting teeth of the upper fixer and the lower fixer are matched with the sawtooth-shaped gear wheels corresponding to the anti-abrasion centralizing body.
5. The cambered surface sucker rod centralizer of claim 1, characterized in that: the fixer comprises inlayer and skin, the inlayer is the flexible material of closely winding on the sucker rod body, the skin is the macromolecular material of casting and parcel inlayer.
6. The cambered surface sucker rod centralizer of claim 1, characterized in that: the fixer is divided into an inner layer, a binding layer and an outer layer, wherein the inner layer is made of multiple layers of elastic fiber materials, the binding layer for binding the inner layer is arranged between the inner layer of the fixer and the outer layer of the fixer, and the outer layer is made of a high polymer material which is cast and wraps the binding layer.
7. The cambered surface sucker rod centralizer of claim 6, wherein: the strapping layer is formed by winding a wire, a ribbon and a rope material on the surface of the multiple layers of elastic fiber materials.
8. The cambered surface sucker rod centralizer of claim 1, characterized in that: the spiral lug boss and the overflow groove are spiral or straight rib-shaped.
9. The manufacturing method of the cambered surface type sucker rod centralizer of claim 1, characterized in that: the method comprises the following steps:
(1) casting to form a fastener having an inner and an outer structure
Designing the position of a fixer on a sucker rod body according to a proper distance, winding a flexible material at the position of the fixer to form an inner layer, binding the flexible material on the sucker rod body by a binding layer, casting the fixer on the outer layer of the tightly bound flexible material by a high polymer material, and fixing the fixer on the sucker rod body to form the fixer with serrated shifting teeth of inner and outer layer structures;
(2) casting anti-wear centralizing body
The sucker rod body between the two fixers is coated with a soluble coating, the coating is cast by a high polymer material to form an anti-abrasion centralizing body, and sawtooth-shaped gear wheels are cast on the two end faces of the anti-abrasion centralizing body.
10. The manufacturing method of the cambered surface type sucker rod centralizer of claim 9, characterized in that: in step (1), an adhesive is added while the flexible material is wound to form the inner layer of the anchor.
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