CN2866792Y - Hollow rod wear resisting centering guide - Google Patents
Hollow rod wear resisting centering guide Download PDFInfo
- Publication number
- CN2866792Y CN2866792Y CN 200520087598 CN200520087598U CN2866792Y CN 2866792 Y CN2866792 Y CN 2866792Y CN 200520087598 CN200520087598 CN 200520087598 CN 200520087598 U CN200520087598 U CN 200520087598U CN 2866792 Y CN2866792 Y CN 2866792Y
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- CN
- China
- Prior art keywords
- outside
- resisting
- wear
- hollow
- hollow rod
- 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
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Abstract
A hollow rod wear-resisting centralizer, wherein the upper outside is a cylinder, an internal screw is arranged in the upper inside and an external screw is arranged in the lower outside. The upper outside cylinder is hot sprayed with wear-resisting nickel-base powder, the spraying thickness is more than 0.25mm, the harderness is greater than HRC50, and thereby the wear-resisting and corrosion-resisting can be received. After being hot sprayed, the surface of the upper outside is polished with roughness of surface lower than 0.0004mm. The under bore and the upper internal screw are connected in order to satisfy the requirements of heated scrubbing, oil flowing and heat electric cable setting. A sealing ring groove is arranged on the lower outside external screw, which can bear inside and outside differential pressure and highly pressurized fluid can be respectively transferred to the inside and outside. A hollow wear-resisting metal connector is connected to the space between two hollow rods, because of the degree of finish, high harderness low frictional factor and good abrasion performance, the abrasion damage is extenuated and oil pipe and the hollow rod have long life duration.
Description
One, technical field
The utility model is the equipment that oil field pumping well is used, and is the wear-resisting centralizer of a kind of hollow stem, belongs to engineering goods.
Two, background technology
In the oil well of producing with oil well pump, sucker rod connects the plunger of oil well pump, and sucker rod pumps in oil pipe, makes oil well pump work that crude oil in the well is evacuated to ground.No matter be straight well, or inclined shaft, all be in contacting, to move between the sucker rod of this oil pumping system and the oil pipe, so there is the friction and wear problem.In order to prevent the wearing and tearing between sucker rod and the oil pipe, many abrasionproof measures have been taked, wherein a kind of is to carry out abrasionproof to handle on the box cupling that connects solid sucker rod, but hollow stem does not have independent box cupling, and all about 8m, an end is an internal thread to every bar hollow stem, one end is an external screw thread, when going into the well, the external screw thread of an end is connected with the internal thread of another root hollow stem, form hollow roofbolt.Because all about 8m, can not carrying out it abrasionproof, handles every bar hollow stem, so, adopt the well hollow stem of hollow stem oil pumping and the wearing and tearing between the oil pipe to can not get solving, cause hollow stem, oil pipe short application life, the oil well production cycle is short, and workover cost is many.
Three, summary of the invention
The purpose of this utility model provides the wear-resisting centralizer of a kind of hollow stem, improves the reliability of hollow roofbolt, increases the oil well production cycle, reduces workover cost.
The purpose of this utility model is achieved in that the outside cylinder that is, there is internal thread last inside, and there is external screw thread following outside, and the hot spraying wearing layer is arranged on the last external cylinder.The hot spraying wearing layer is an alloy powder on the last external cylinder, as nickel-base alloy powder.Bottom endoporus and upper internal threaded UNICOM.On the outside external screw thread seal groove is arranged down.
The beneficial effects of the utility model are: the wear-resisting centralizer of hollow stem is connected between hollow stem and the hollow stem, owing to polish processing again behind the hollow stem antifriction metal (AFM) joint surface hot spraying wearing layer, make its finish height, the hardness height, friction factor is low, wearing and tearing alleviate, and can prolong oil pipe, hollow stem application life simultaneously.
Four, description of drawings
Accompanying drawing is the utility model embodiment full sectional view.
Five, the specific embodiment
Below in conjunction with accompanying drawing the utility model embodiment is described.
Last outside is a cylinder 1, and there is internal thread 2 last inside, and there is external screw thread 5 following outside, hot spraying wearing layer 3 on the last external cylinder 1, and hot spraying wearing layer 3 is an alloy powder, as nickel-base alloy powder.Jetting thickness is greater than 0.25mm, and hardness is higher than HRC50, and is wear-resisting, corrosion-resistant.Processing is polished to the surface in hot spraying wearing layer 3 back, and surface roughness is lower than 0.0004mm, and the friction factor of itself and oil pipe is reduced to below 0.01, and except that self was wear-resisting, the oil pipe that also can not wear and tear had played the effect of bidirectional protective.Bottom endoporus and upper internal threaded 2 UNICOMs, satisfied heat washes, fuel-displaced, be lowered to requirements such as electric heating cable.Down on the outside external screw thread 5 seal groove 4 is arranged, make it install to go into the well behind sealing ring and bear inside and outside differential pressure, the inside and outside high-pressure fluid of can carrying does not respectively leak through with each other.
For unloading the screw thread requirement on the convenience, can be on cylinder 1 plane of design and installation pipe wrench.
Claims (3)
1, the wear-resisting centralizer of a kind of hollow stem is characterized in that: go up the outside cylinder (1) that is, there is internal thread (2) last inside, and there is external screw thread (5) following outside, and hot spraying wearing layer (3) is arranged on the last external cylinder (1).
2, the wear-resisting centralizer of hollow stem according to claim 1 is characterized in that: bottom endoporus and upper internal threaded (2) UNICOM.
3, the wear-resisting centralizer of hollow stem according to claim 1 is characterized in that: seal groove (4) is arranged on the following outside external screw thread (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520087598 CN2866792Y (en) | 2005-09-26 | 2005-09-26 | Hollow rod wear resisting centering guide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520087598 CN2866792Y (en) | 2005-09-26 | 2005-09-26 | Hollow rod wear resisting centering guide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2866792Y true CN2866792Y (en) | 2007-02-07 |
Family
ID=37702496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520087598 Expired - Fee Related CN2866792Y (en) | 2005-09-26 | 2005-09-26 | Hollow rod wear resisting centering guide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2866792Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373890A (en) * | 2011-11-25 | 2012-03-14 | 朱平 | Oil-pumping polished rod connector |
| CN103883266A (en) * | 2014-02-26 | 2014-06-25 | 中国石油化工股份有限公司 | Continuous oil pipe wellhead centralizer |
-
2005
- 2005-09-26 CN CN 200520087598 patent/CN2866792Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373890A (en) * | 2011-11-25 | 2012-03-14 | 朱平 | Oil-pumping polished rod connector |
| CN103883266A (en) * | 2014-02-26 | 2014-06-25 | 中国石油化工股份有限公司 | Continuous oil pipe wellhead centralizer |
| CN103883266B (en) * | 2014-02-26 | 2016-06-08 | 中国石油化工股份有限公司 | Coiled tubing borehole centralizer |
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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: 20070207 Termination date: 20100926 |