CN2786270Y - Self-lubricating paraffin control wearable sucker rod assembly - Google Patents
Self-lubricating paraffin control wearable sucker rod assembly Download PDFInfo
- Publication number
- CN2786270Y CN2786270Y CN 200420150750 CN200420150750U CN2786270Y CN 2786270 Y CN2786270 Y CN 2786270Y CN 200420150750 CN200420150750 CN 200420150750 CN 200420150750 U CN200420150750 U CN 200420150750U CN 2786270 Y CN2786270 Y CN 2786270Y
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- CN
- China
- Prior art keywords
- sucker rod
- self
- rod assembly
- lubricating
- abrasion
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- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a self-lubricating paraffin control wearable sucker rod assembly, including sucker rods and connected hoops for connecting the sucker rod. The external surfaces of said sucker rods and connected hoops are wrapped by self-lubricating wearable layers. The external surface of the sucker rod assembly can hold crude oil liquid, obtaining self-lubricating performance and wearable performance, prolonging the service life.
Description
Technical field:
The utility model relates to the employed self-lubricating wax control of a kind of oil well abrasion-proof sucker rod assembly.
Background technology:
Sucker rod pump now is widely used in the well recovery field.This kind sucker rod pump comprises and is installed in ground oil pumper and is made up of the sucker rod assembly that is connected with this oil pumper, polished rod, oil pipe, oil well pump etc., and the sucker rod assembly generally includes sucker rod and box cupling, and universal joint etc.Because at least below several kms, and in-place oil liquid contains dopes such as paraffin to oil reservoir apart from ground, so, when utilizing sucker rod pumping, every mouthful of sucker rod assembly that well all needs km to grow often.And under the driving of oil pumper, constantly do pumping in the oil pipe of oil well, be with piston in pump, also to do simultaneously and pump, so that crude oil can be thus lifted in ground container or the pipeline road in the stratum.Yet, because all there is different gradients in oil well, the development and application of directed extended reach well drilling new technology particularly of today makes that the gradient of oil well is bigger, also strengthened simultaneously the extrusion friction power between sucker rod assembly and the tube inner wall, this has aggravated the wearing and tearing of sucker rod assembly.In addition, owing to contain dope such as paraffin in the crude oil usually, these paraffin etc. accumulate on the sucker rod assembly for a long time, oil pumping process card, phenomenon such as stifled can occur, cause oil well to stop production.
Existing sucker rod assembly, normally by forming with the steel of oil pipe with material, this kind structure sucker rod assembly is in nearly ten thousand times reciprocating motion every day, self and oil pipe very easily are worn, and no matter be that oil pipe or which parts of sucker rod assembly are worn, all need keep in repair it, bring bigger economic loss also for simultaneously the oil pumping operation with great amount of manpower and material resources.Particularly for inclined shaft or crooked vertical shaft is arranged, because the sucker rod assembly is in constantly doing the reciprocating motion of high-frequency tilting, the frictional force that inwall produced of its outer wall and oil pipe is inhomogeneous, the position that frictional force is bigger can carry out the transition to the face contact friction gradually from linear contact friction, thereby accelerate the abrasion speed at these positions, cause sucker rod assembly and oil pipe premature failure.
" abrasion-proof sucker rod box cupling " that Chinese patent proposes for No. 2544087 is exactly a kind of solution of the above problems, and the technical scheme of this patent is the external surface spraying one deck abrasion-proof corrosion-proof erosion resisting coating at box cupling.Its meaning is the wear problem that the mode of utilizing the external surface that is slightly larger than the box cupling of sucker rod at external diameter to be coated with wearing layer solves the sucker rod assembly.But, as previously mentioned,, in the vertical shaft of inclined shaft or bending, also have sucker rod and tube inner wall contact friction problem, and the wearing and tearing of sucker rod or fracture can cause equally oil pumper to damage even the external diameter of box cupling is slightly larger than sucker rod; Prior problem is, because the sucker rod and the box cupling of this kind structure can not produce self-lubricating, and oil reservoir contains dopes such as paraffin, cause oil pumper in oil pumping process, can stick to the external surface of sucker rod assembly, add the frictional resistance that sucker rod and box cupling and tube inner wall produce, can quicken the damage of sucker rod assembly, also increase the load of oil pumper simultaneously, cause the raising of cost of production.
Summary of the invention:
Task of the present utility model provides a kind of utilization can produce the self-lubricating wax control abrasion-proof sucker rod assembly that self-lubricating and wear-resisting dual mode improve application life.
The self-lubricating wax control abrasion-proof sucker rod assembly that the utility model proposed comprises sucker rod and the box cupling that is used to be connected sucker rod, and the external surface of described sucker rod and box cupling is coated with one deck self-lubricating abrasion-resistant layer.
The external surface of described self-lubricating abrasion-resistant layer is provided with pitted skin formula blind hole and/or the blind groove of curvilinear style, and perhaps described self-lubricating abrasion-resistant layer is provided with two-way fine thread and/or netted blind hole.And the self-lubricating abrasion-resistant layer is made of the alloy steel that contains nickel, chromium and molybdenum matched combined.
The sucker rod that the utility model proposed and the external surface of box cupling all adopt blind hole or the blind groove of curvilinear style very tiny and that naked eyes are directly observed, in blind hole or blind groove, always retain crude oil liquid is arranged, reduce the friction factor between this two metal of sucker rod assembly and tube inner wall, reach self-lubricating and wear-resisting performance, and this top layer metal can not reduce original mechanical performance of sucker rod assembly; In addition, the wearing layer that coats at the external surface of sucker rod and box cupling constitutes by containing the alloy steel that nickel, chromium and molybdenum collocation cooperate, so this sucker rod assembly can further improve application life in that to produce self-lubricating also wear-resisting.
Description of drawings:
Accompanying drawing 1 is the surface structure schematic diagram of an embodiment of the utility model.
The specific embodiment:
Referring to Fig. 1, this figure provides the overall appearance structure of the embodiment of sucker rod assembly that the utility model proposes.This sucker rod assembly comprises sucker rod 1 and the box cupling 2 that is used to be connected sucker rod 1.Wherein, sucker rod 1 is to have externally threaded straight-bar spare by microscler and two ends to constitute, and box cupling 2 is to be made of the cylinder that has core force's screw thread than short and two ends inner surface.External surface at sucker rod 1 and box cupling 2 is provided with one deck by the self-lubricating abrasion-resistant layer 11 and 21 that alloy steel constituted that contains nickel, chromium and molybdenum matched combined, and the external surface in self-lubricating abrasion-resistant layer 11 and 21 is provided with pitted skin formula blind hole, or the blind groove of curvilinear style, or be provided with the combination of pitted skin formula blind hole or blind groove, and the blind groove of curvilinear style can adopt two-way fine thread, pitted skin formula blind hole can be provided with veil shape blind hole, so that it can realize self-lubricating.Above-mentioned pitted skin formula blind hole or the blind groove of curvilinear style all are that naked eyes institute is invisible, can't represent its structure with diagram, so do not provide concrete structure among the figure.
Claims (4)
1. self-lubricating wax control abrasion-proof sucker rod assembly comprises sucker rod and the box cupling that is used to be connected sucker rod, it is characterized in that: the external surface of described sucker rod and box cupling is coated with one deck self-lubricating abrasion-resistant layer.
2. sucker rod assembly according to claim 1 is characterized in that: the external surface of described self-lubricating abrasion-resistant layer is provided with pitted skin formula blind hole and/or the blind groove of curvilinear style.
3. sucker rod assembly according to claim 1 is characterized in that: described self-lubricating abrasion-resistant layer is made of the alloy steel that contains nickel, chromium and molybdenum matched combined.
4. sucker rod assembly according to claim 1 and 2 is characterized in that: described self-lubricating abrasion-resistant layer is provided with two-way fine thread and/or netted blind hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420150750 CN2786270Y (en) | 2004-11-11 | 2004-11-11 | Self-lubricating paraffin control wearable sucker rod assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420150750 CN2786270Y (en) | 2004-11-11 | 2004-11-11 | Self-lubricating paraffin control wearable sucker rod assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2786270Y true CN2786270Y (en) | 2006-06-07 |
Family
ID=36774845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420150750 Expired - Fee Related CN2786270Y (en) | 2004-11-11 | 2004-11-11 | Self-lubricating paraffin control wearable sucker rod assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2786270Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863573A (en) * | 2016-05-30 | 2016-08-17 | 中国石油天然气股份有限公司 | Self-lubricating wax-proof antiscale oil production pipe column |
| CN105927163A (en) * | 2016-04-26 | 2016-09-07 | 中国石油天然气股份有限公司 | Lubricating grease wax-proof and scale-proof oil production pipe column and application thereof |
| CN106194047A (en) * | 2016-08-22 | 2016-12-07 | 中国石油天然气股份有限公司 | Sucker rod coupling |
-
2004
- 2004-11-11 CN CN 200420150750 patent/CN2786270Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927163A (en) * | 2016-04-26 | 2016-09-07 | 中国石油天然气股份有限公司 | Lubricating grease wax-proof and scale-proof oil production pipe column and application thereof |
| CN105863573A (en) * | 2016-05-30 | 2016-08-17 | 中国石油天然气股份有限公司 | Self-lubricating wax-proof antiscale oil production pipe column |
| CN105863573B (en) * | 2016-05-30 | 2018-07-13 | 中国石油天然气股份有限公司 | Self-lubricating wax-proof antiscale oil production pipe column |
| CN106194047A (en) * | 2016-08-22 | 2016-12-07 | 中国石油天然气股份有限公司 | Sucker rod coupling |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |