CN201306127Y - Double curved surface protective sucker rod coupling - Google Patents
Double curved surface protective sucker rod coupling Download PDFInfo
- Publication number
- CN201306127Y CN201306127Y CNU2008201749864U CN200820174986U CN201306127Y CN 201306127 Y CN201306127 Y CN 201306127Y CN U2008201749864 U CNU2008201749864 U CN U2008201749864U CN 200820174986 U CN200820174986 U CN 200820174986U CN 201306127 Y CN201306127 Y CN 201306127Y
- Authority
- CN
- China
- Prior art keywords
- sucker rod
- curved surface
- main body
- oil
- coupling
- 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.)
- Expired - Fee Related
Links
- 230000008878 coupling Effects 0.000 title abstract 7
- 238000010168 coupling process Methods 0.000 title abstract 7
- 238000005859 coupling reaction Methods 0.000 title abstract 7
- 230000001681 protective effect Effects 0.000 title abstract 3
- 230000002146 bilateral effect Effects 0.000 claims description 3
- 238000005086 pumping Methods 0.000 abstract description 5
- 238000000605 extraction Methods 0.000 abstract description 2
- 239000003129 oil well Substances 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 29
- 230000000694 effects Effects 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Sliding-Contact Bearings (AREA)
Abstract
The utility model relates to a sucker rod pump oil extraction device in the oil industry, in particular to a double curved surface protective sucker rod coupling. The technical proposal is as follows: the sucker rod coupling comprises a main body, an internal thread passing through the center of the main body, and connectors arranged at the two ends of the main body and used for the connection with a sucker rod, and is characterized in that the main body is in a dumbbell shape, the dumbbell shape refers to a double rotating convex curved surface body, the two sides of the double rotating convex curved surface body are symmetrical to each other, and the site of the double rotating convex curved surface body in contact with the oil pipe is located on the convex curved surface. The double curved surface protective sucker rod coupling has the advantages that the dumbbell-shaped coupling and the rotating convex curved surface body of the dumbbell-shaped coupling are in contact with the oil pipe, which can effectively increase the oil pipe contact area, reduce the contact stress, reduce the frictional force, prolong the service life of the coupling, effectively protect and support the sucker rod, overcome the eccentric wear of the sucker rod in the pumping well, and extend the maintenance-free period of the oil well.
Description
One, technical field:
The utility model relates to a kind of sucker rod pumping equipment of petroleum industry, particularly a kind of pair of cambered surface protection rod collar.
Two, background technology:
Rod string is the important driving member of oil pumping system, also is one of weak link in the rod pumping system.In the oil extraction system, rod string contacts with oil pipe and causes the eccentric wear phenomenon serious unusually at present.Because the deflection of well, sucker rod inevitably contacts with oil pipe, cause eccentric wear, the suffered resistance obstruction sucker rod of oil pump plunger piston moves downward during down stroke, therefore, sucker rod bottom roofbolt is except that bearing La-La varying load, also bear the effect of drawing-pressing fluctuating load, condition of work is very abominable, causes the eccentric wear phenomenon aggravation of sucker rod bottom and oil pipe, for old filed, along with crude output successively decreases, crude oil water containing increases, and rod tube frictional contact surface lubricating ability weakens, corrosivity strengthens, and has aggravated rod and tube partial-wear; Along with the increase of superencipher, three encryption directional wells, inclined shaft, the eccentric wear well is more and more; The poly-displacement of reservoir oil oil field of notes contains polymer in the crude oil, increased the viscosity and the corrosivity of crude oil, makes rod tube wearing and tearing aggravation, and the intensity that this has not only reduced sucker rod causes the sucker rod partial wear fracture, but also the worn out oil pipe of meeting causes the oil pipe leakage.
Rod collar is the device that connects sucker rod, play certain anti-attrition effect of setting upright again, the traditional pumping rod made by steel box cupling of main use on the oil field, traditional rod collar profile is cylindrical, when rod string moves back and forth in oil pipe, form sliding friction with oil pipe, the subject matter that exists is that oil pipe and rod string wearing and tearing are all very serious, though once the steel roller type rod collar of Shi Yonging had certain anti-eccentric wear effect, principle is also very simple, and fully by the rolling of roller and the anti-eccentric wear of the realization of sliding, but roller shaft is easy to grind away, cause the accident of card sucker rod, promote little.Steel ball-type rod collar is to improve on roller type box cupling structure, overcome the easily broken problem of roller shaft, on certain degree, prolonged the life-span, but new problem has appearred, be that ball grooves is worn away, ball is scattered, centralizer lost efficacy, also may cause simultaneously the accident of card sucker rod, holddown, so popularization face is also less.
The nylon rod collar has changed material, and its advantage is to sacrifice nylon protection oil pipe but because the nylon scuff resistance is low, application life is limited equally.
Three, summary of the invention:
The purpose of this utility model is exactly the above-mentioned defective that exists at prior art; a kind of pair of cambered surface protection rod collar is provided, can effectively protects and set upright sucker rod, and realize that rod collar contacts with the oil pipe cambered surface; reach the anti-attrition effect, can be used for straight well and inclined shaft.
Its technical scheme is: comprise the box cupling main body, its center is for connecting internal thread, and two ends connect with sucker rod respectively, the box cupling main body be shaped as dumb-bell shape, described dumb-bell shape is two surface of revolution bodies of evagination camber line, and bilateral symmetry contacts the outer convex globoidal position at two surface of revolution bodies with oil pipe.The reciprocal twocouese of dumbbell body box cupling and pipe inner surface all can form the slippage contact conditions of incision gradually, is very beneficial for forming oil film or moisture film in the slippage contact zone, and the sliding pair that can effectively protect box cupling and oil pipe to form is realized anti-attrition.
The middle part of above-mentioned box cupling main body is provided with the groove of taking spanner.
The beneficial effects of the utility model are: the box cupling of dumb-bell shape and surface of revolution body thereof contact the contact area that can effectively increase with oil pipe with oil pipe; reduce contact stress; realize antifriction; prolong and use the box cupling life-span; can effectively protect and set upright sucker rod; alleviate pumpingh well side-abrasion of rod string problem, prolong oil well repair free period.
Four, description of drawings:
Accompanying drawing 1 is a structural representation of the present utility model.
Five, the specific embodiment:
In conjunction with the accompanying drawings 1, the utility model will be further described:
Its technical scheme is: comprise box cupling main body 1, its center is for connecting internal thread 2 and internal thread 4, respectively with the sucker rod thread connection, the middle part is provided with the groove 3 of taking spanner, box cupling main body 1 be shaped as dumb-bell shape, described dumb-bell shape is two surface of revolution bodies of evagination camber line, and bilateral symmetry contacts the outer convex globoidal position at two surface of revolution bodies with oil pipe.The reciprocal twocouese of dumbbell body box cupling and pipe inner surface all can form the slippage contact conditions of incision gradually, is very beneficial for forming oil film or moisture film in the slippage contact zone, and the sliding pair that can effectively protect box cupling and oil pipe to form is realized anti-attrition.
Box cupling and rod string pump in oil pipe and form the sliding pair friction, and dumb-bell shape surface of revolution body contacts the contact area that can effectively increase with oil pipe with oil pipe, reduce contact stress, realize antifriction, prolong and use the box cupling life-span.
And traditional rod collar, its cylindrical shape forms scraped finish contact movement, serious wear with pipe inner surface on direction of relative movement.
Two cambered surface protection rod collars are made by standard sucker rod series, and internal whorl is consistent with the sucker rod screw thread, and is identical with traditional rod collar mounting method.At the scene of recovering the oil, require to be installed in desired location according to the oil production engineer.
Claims (2)
1, a kind of pair of cambered surface protection rod collar comprises box cupling main body (1), and its center is for connecting internal thread (2,4); two ends connect with sucker rod respectively; it is characterized in that: box cupling main body (1) be shaped as dumb-bell shape, described dumb-bell shape is two surface of revolution bodies of evagination camber line, bilateral symmetry.
2, according to claim 1 pair of cambered surface protection rod collar, it is characterized in that: the middle part of described box cupling main body (1) is provided with the groove (3) of taking spanner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201749864U CN201306127Y (en) | 2008-11-10 | 2008-11-10 | Double curved surface protective sucker rod coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201749864U CN201306127Y (en) | 2008-11-10 | 2008-11-10 | Double curved surface protective sucker rod coupling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201306127Y true CN201306127Y (en) | 2009-09-09 |
Family
ID=41098594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201749864U Expired - Fee Related CN201306127Y (en) | 2008-11-10 | 2008-11-10 | Double curved surface protective sucker rod coupling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201306127Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104727760A (en) * | 2015-03-20 | 2015-06-24 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Spherical friction and resistance reduction stabilizer |
| CN104895510A (en) * | 2015-06-11 | 2015-09-09 | 西南石油大学 | Slip ring type centering device |
-
2008
- 2008-11-10 CN CNU2008201749864U patent/CN201306127Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104727760A (en) * | 2015-03-20 | 2015-06-24 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Spherical friction and resistance reduction stabilizer |
| CN104895510A (en) * | 2015-06-11 | 2015-09-09 | 西南石油大学 | Slip ring type centering device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209959185U (en) | Eccentric wear prevention telescopic sucker rod guider | |
| CN201306127Y (en) | Double curved surface protective sucker rod coupling | |
| CN201407001Y (en) | Anti-deviation and abrasion correcting device for oil pumping rod of oil tube | |
| CN201165851Y (en) | Self-adjusting anti-wear protection sucker rod coupling | |
| CN201056990Y (en) | Sucker-rod coupling with bidirectional cambered surface protection | |
| CN103499501B (en) | A method and device for evaluating sucker rod wear based on well fluid lubrication effect | |
| CN201254956Y (en) | Anti-biasing-wear hollow sucker rod | |
| CN201747286U (en) | Ball abrasion-reducing torsion-decreasing joint | |
| CN206376759U (en) | A three-arc self-rotating sucker rod centralizer | |
| CN201334875Y (en) | Two-way shielded arc type sucker rod joint | |
| CN206376760U (en) | A Self-rotating Sucker Rod Centralizer with Large Channel | |
| CN205936435U (en) | Self-lubricating screw centralizer for sucker rod | |
| CN201159057Y (en) | Elastic centralizer | |
| CN2797613Y (en) | Vertical rotating combination type off-axis wear proof device | |
| CN203285359U (en) | Positive displacement drill arc-shaped pin roller ball hinge joint universal shaft | |
| CN207296908U (en) | A kind of proof-wear sucker rod centralising device suitable for light crude oil | |
| CN2881064Y (en) | Linear bearing type anti-eccentric wear device | |
| CN2871799Y (en) | Magnetic-stabilized carbon fibre unit against eccentric abrasion | |
| CN207598205U (en) | A kind of contactless oil pumping rod centering device suitable for inclined shaft | |
| CN106150344A (en) | Compensation sealing universal drive shaft | |
| CN207436937U (en) | A surface-textured wear-resistant oil well pumping string | |
| CN202300223U (en) | Multifunctional sucker rod short joint | |
| CN104153721A (en) | Application of high-temperature-resistant and abrasion-resistant sucker rod centralizer in oilfield production | |
| CN2677588Y (en) | Automatic offset centering guide | |
| CN103334705A (en) | Novel sucker rod centering device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090909 Termination date: 20091210 |