CN104074475A - Sucker rod centralizer for full metal screw pump lifting - Google Patents
Sucker rod centralizer for full metal screw pump lifting Download PDFInfo
- Publication number
- CN104074475A CN104074475A CN201310096842.7A CN201310096842A CN104074475A CN 104074475 A CN104074475 A CN 104074475A CN 201310096842 A CN201310096842 A CN 201310096842A CN 104074475 A CN104074475 A CN 104074475A
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- China
- Prior art keywords
- screw pump
- supporting positive
- positive cover
- axle
- pump lifting
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Abstract
The invention discloses a sucker rod centralizer for full metal screw pump lifting. The sucker rod centralizer comprises a mandrel arranged between two sucker rods, wherein a centralizing sleeve sheaths on the mandrel used as a torque transmission element; the centralizing sleeve is in clearance fit with the mandrel and can freely rotate around the mandrel; and the outer diameter of the centralizing sleeve is a little smaller than the inner diameter of an oil pipe. The centralizing sleeve is of a structure that the upper end and the lower end are provided with lateral openings, and the inside is hollow; and the lateral openings formed in the upper and lower ends of the centralizing sleeve are communicated with a cavity arranged at the inside, and formed passages are used as fluid passages. The whole body of the centralizer is made of metal materials, so the sucker rod centralizer can be used in high-temperature environment of a thermal production well; the rotating type centralizing sleeve is in clearance fit with the oil pipe; the rotation only occurs for grinding when the contact occurs; the mutual abrasion duration is reduced; the abrasion quantity is effectively reduced; and the service life is prolonged.
Description
Technical field
The present invention relates to the oil pumping rod centering device of petroleum industry screw bolt well, specifically all-metal screw pump lifting oil pumping rod centering device.
Background technology
In the oil well of producing with screw pump, sucker rod rotates to provide power to screw pump in oil pipe.In the relative rotary motion of sucker rod and oil pipe, the two certainly exists mutual wearing and tearing.For being generally lowered to oil pumping rod centering device, alleviation frictional dissipation carries out righting anti-attrition.The existing centralizer for screw bolt well adopts the nonmetals such as nylon, rubber to make wear-out part mostly, and all-metal screw pump is mainly used in thick oil thermal extraction and carries out lifting.Existing nonmetal centralizer cannot be applicable to hot environment, so must solve the rod tube wear problem of such hole condition.
Through retrieval, also do not find similar techniques, so in view of this, for the problems referred to above, a kind of all-metal screw pump lifting oil pumping rod centering device reasonable in design and that solved above-mentioned disappearance is proposed.
Summary of the invention
The object of the present invention is to provide all-metal screw pump lifting oil pumping rod centering device, slow down rod tube rate of depreciation, extend rod tube application life and oil well production cycle.
In order to reach above-mentioned purpose, the present invention has adopted following technical scheme, all-metal screw pump lifting oil pumping rod centering device, comprise and be connected to two axles between sucker rod, described have supporting positive cover as cover in the axle of moment of torsion transmitting element, supporting positive cover and axle are that matched in clearance also can rotate freely around axle, and supporting positive cover external diameter is slightly less than pipe aperture.
Described supporting positive cover is the structure of upper and lower side side openning, boring, and the side opening at its upper and lower two ends and inner cavity are communicated with, as fluid passage.
The whole employing of described this centralizer can be made by resistant to elevated temperatures metal material.
Described supporting positive cover and axle are in contact with one another at upper and lower side two places, and adopt spray treatment in contact portion and supporting positive cover external surface, spraying abrasion-proof metal level, and polish processing.
Described axle wherein one end is offered internal thread, the other end is offered external screw thread, offer internal thread one end and be connected with the external screw thread of sucker rod, offer externally threaded one end and be connected with coupling internal thread of sucker rod, and rod collar connects the external screw thread of another root sucker rod again by self internal thread.
Described supporting positive cover is offered externally threaded one end by axle and is inserted in.
Described axle is offered an end of internal thread and is offered the limiting stand of restriction supporting positive cover axially-movable, and described axle is offered an externally threaded end and by the rod collar connecting, limited the axially-movable of supporting positive cover.
Compared to prior art, the present invention has following beneficial effect:
The whole metal material that adopts of centralizer of the present invention is made, can be high temperature resistant; Supporting positive cover and axle contact portion and supporting positive cover external surface adopt spray treatment, and polish processing, to reduce frictional force and to strengthen corrosion resistance, can in hot environment, work for a long time.
In a word, advantage of the present invention is: 1, the whole metal material that adopts of centralizer is made, and can be used in thermal production well hot environment; 2, matched in clearance between rotary supporting positive cover and oil pipe only rotates and carries out anti-attrition when contact, has reduced mutual wearing and tearing duration, effectively alleviates wear extent, has extended application life.
Accompanying drawing explanation
Fig. 1 is the structural representation of oil pumping rod centering device for all-metal screw pump lifting of the present invention.
The specific embodiment
Relevant detailed description of the present invention and technology contents, coordinate accompanying drawing to be described as follows, yet accompanying drawing only provides the use of reference with explanation, is not used for the present invention to be limited.
With reference to accompanying drawing 1, all-metal screw pump lifting oil pumping rod centering device, is comprised of axle 1, rotation supporting positive cover 2 and rod collar 3.Its central axis 1 one end is sucker rod internal thread, and the other end is sucker rod external screw thread, and axle 1 is through rotation supporting positive cover 2, and male end is connected with rod collar 3, and the present invention has completed assembling.The contact portion spraying abrasion-proof metal level of axle 1 and supporting positive cover 2.Supporting positive cover 2 external surface spraying abrasion-proof metal levels also polish processing.
During use, being substituted former rod collar is installed between two sucker rods.Rotation supporting positive cover external diameter is slightly smaller than pipe aperture, and free to rotate, rotates supporting positive cover and oil pipe matched in clearance, and rotate around axle in sucker rod motion process, plays the effect of righting anti-attrition.Oil pipe inner fluid enters its inner through hole through the side opening of rotation supporting positive cover one end, and flows out along the side opening of the other end.In order to strengthen, flow out unobstructed effect, the axle outer wall corresponding with supporting positive cover offered indent annular groove.
The present invention has improved the temperature resistant capability of screw pump well pumping rod centering device, and has strengthened anti-attrition and corrosion resistant ability by structure and Design Processing, can adapt to preferably high-temp thermal recovery well environment for use.
The foregoing is only preferred embodiment of the present invention, non-in order to limit the scope of the claims of the present invention, other use the equivalence of patent spirit of the present invention to change, and all should all belong to the scope of the claims of the present invention.
Claims (7)
1. all-metal screw pump lifting oil pumping rod centering device, it is characterized in that, comprise and be connected to two axles between sucker rod, described have supporting positive cover as cover in the axle of moment of torsion transmitting element, supporting positive cover and axle are that matched in clearance also can rotate freely around axle, and supporting positive cover external diameter is slightly less than pipe aperture.
2. all-metal screw pump lifting oil pumping rod centering device according to claim 1, is characterized in that, described supporting positive cover is the structure of upper and lower side side openning, boring, and the side opening at its upper and lower two ends and inner cavity are communicated with, as fluid passage.
3. all-metal screw pump lifting oil pumping rod centering device according to claim 1, is characterized in that, the whole employing of described this centralizer can be made by resistant to elevated temperatures metal material.
4. all-metal screw pump lifting oil pumping rod centering device according to claim 1, it is characterized in that, described supporting positive cover and axle are in contact with one another at upper and lower side two places, and adopt spray treatment in contact portion and supporting positive cover external surface, spraying abrasion-proof metal level, and polish processing.
5. all-metal screw pump lifting oil pumping rod centering device according to claim 1, it is characterized in that, described axle wherein one end is offered internal thread, the other end is offered external screw thread, offering internal thread one end is connected with the external screw thread of sucker rod, offer externally threaded one end and be connected with coupling internal thread of sucker rod, and rod collar connects the external screw thread of another root sucker rod again by self internal thread.
6. all-metal screw pump lifting oil pumping rod centering device according to claim 5, is characterized in that, described supporting positive cover is offered externally threaded one end by axle and is inserted in.
7. all-metal screw pump lifting oil pumping rod centering device according to claim 6, is characterized in that, described axle is offered an end of internal thread and offered the limiting stand of restriction supporting positive cover axially-movable, and described axle offers externally threaded one
The axially-movable of supporting positive cover is limited in end by the rod collar connecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310096842.7A CN104074475A (en) | 2013-03-25 | 2013-03-25 | Sucker rod centralizer for full metal screw pump lifting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310096842.7A CN104074475A (en) | 2013-03-25 | 2013-03-25 | Sucker rod centralizer for full metal screw pump lifting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104074475A true CN104074475A (en) | 2014-10-01 |
Family
ID=51596041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310096842.7A Pending CN104074475A (en) | 2013-03-25 | 2013-03-25 | Sucker rod centralizer for full metal screw pump lifting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104074475A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4757861A (en) * | 1987-08-06 | 1988-07-19 | Klyne Albert A | Oil well sucker rod coupling assembly |
| CN2881065Y (en) * | 2005-09-26 | 2007-03-21 | 孙玉珍 | Metal centering guide of screw pump oil extraction rod |
| CN201588565U (en) * | 2010-01-31 | 2010-09-22 | 付长生 | Screw pump well sucker rod centralizer |
| US20110114338A1 (en) * | 2009-11-13 | 2011-05-19 | Casassa Garrett C | Non-rotating casing centralizer |
| CN102913146A (en) * | 2012-10-18 | 2013-02-06 | 陕西启源科技发展有限责任公司 | Sucker rod pumping improvement centralizer |
| CN202745732U (en) * | 2012-07-26 | 2013-02-20 | 中国石油天然气股份有限公司 | Low friction resistance sucker rod centralizer |
| CN203213977U (en) * | 2013-03-25 | 2013-09-25 | 中国石油化工股份有限公司 | Rotary internal flow centralizer for lifting full-metal screw pump |
-
2013
- 2013-03-25 CN CN201310096842.7A patent/CN104074475A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4757861A (en) * | 1987-08-06 | 1988-07-19 | Klyne Albert A | Oil well sucker rod coupling assembly |
| CN2881065Y (en) * | 2005-09-26 | 2007-03-21 | 孙玉珍 | Metal centering guide of screw pump oil extraction rod |
| US20110114338A1 (en) * | 2009-11-13 | 2011-05-19 | Casassa Garrett C | Non-rotating casing centralizer |
| CN201588565U (en) * | 2010-01-31 | 2010-09-22 | 付长生 | Screw pump well sucker rod centralizer |
| CN202745732U (en) * | 2012-07-26 | 2013-02-20 | 中国石油天然气股份有限公司 | Low friction resistance sucker rod centralizer |
| CN102913146A (en) * | 2012-10-18 | 2013-02-06 | 陕西启源科技发展有限责任公司 | Sucker rod pumping improvement centralizer |
| CN203213977U (en) * | 2013-03-25 | 2013-09-25 | 中国石油化工股份有限公司 | Rotary internal flow centralizer for lifting full-metal screw pump |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141001 |