CN212428625U - Anti-corrosion wear-resistant oil pipe - Google Patents
Anti-corrosion wear-resistant oil pipe Download PDFInfo
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- CN212428625U CN212428625U CN202021223541.8U CN202021223541U CN212428625U CN 212428625 U CN212428625 U CN 212428625U CN 202021223541 U CN202021223541 U CN 202021223541U CN 212428625 U CN212428625 U CN 212428625U
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- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
The utility model discloses an anticorrosive wear-resisting oil pipe, including the oil pipe body, combine to have the boronizing layer that adopts the solid method technology on the inner wall of this oil pipe body, it has the external screw thread to process on the outer wall at oil pipe body both ends, annular outer wall recess has been seted up on the outer wall at oil pipe body both ends respectively, and the tip build-up welding at oil pipe body both ends has tip anti-corrosion wear layer, and build-up welding has the pipe wall anti-corrosion wear layer that extends to tip anti-corrosion wear layer in the annular outer wall recess at oil pipe body both ends, and processing has on the pipe wall anti-corrosion wear layer at oil pipe body both ends the external screw thread. The utility model discloses an anticorrosive wear resistant oil pipe can all make anticorrosive wear resistant protection with the structure position of crude oil contact, has good wear-resisting, corrosion resisting property on the whole, has longer life.
Description
Technical Field
The utility model relates to an oil pipe in well is gone into under oil field exploitation, specifically speaking relate to an anticorrosive wear resistant oil pipe.
Background
A tubing string is a pipe that carries crude oil and natural gas from a hydrocarbon reservoir to the surface and is used to withstand the pressures generated during production. The oil pipes are connected in sequence through oil pipe couplings to form the oil pipe column.
With the continuous deepening of oil field exploitation, many oil fields in China enter a medium and high water content development period, the water content continuously rises, and the corrosion of an oil pipe becomes serious day by day, so that the corrosion becomes a key factor influencing the reliability and the service life of the oil pipe. Meanwhile, the crude oil contains a large amount of corrosive media such as CO2、H2S、Cl-And a small amount of dissolved oxygen and sulfate reducing bacteria accelerate the corrosion of oil pipes, shorten the repair-free period of oil wells, increase the maintenance times of the oil wells, and seriously affect the safety and development efficiency of the oil fields.
Meanwhile, along with the continuous deep development of oil field water injection, the continuous rising of the comprehensive water content, the deterioration of the well condition of an oil-water well is gradually intensified, and due to factors such as well deviation and well condition deterioration, the strong corrosivity of the produced water of the oil field, the gradual increase of the lower pump depth, the continuous increase of a deviated well and a horizontal well and the like, the phenomena of eccentric wear and corrosion of an oil pipe and an oil pumping rod in the sucker-rod pump well are gradually intensified, the speed of the breaking of the oil pumping rod and the perforation of the oil pipe is increased, the oil well operation is frequent, and the normal production of the sucker-rod pump well is seriously.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an anticorrosive wear resistant oil pipe that has good wear-resisting, corrosion resisting property on the whole.
For solving the technical problem, the utility model relates to an anticorrosive wear-resisting oil pipe, including the oil pipe body, combine to have the boronizing layer that adopts the solid method technology on the inner wall of this oil pipe body, it has the external screw thread to process on the outer wall at oil pipe body both ends, the annular outer wall recess has been seted up on the outer wall at oil pipe body both ends respectively, and the tip build-up welding at oil pipe body both ends has the anticorrosive wearing layer of tip, and the build-up welding has the pipe wall anti-corrosion wear layer that extends to the anticorrosive wearing layer of tip in the annular outer wall recess at oil pipe body both ends, and it has to process on the pipe wall anti-corrosion wear layer at oil pipe.
Preferably, the end anticorrosion wear-resistant layer and the pipe wall anticorrosion wear-resistant layer are both nickel-based alloy layers or stainless steel layers.
Furthermore, the length L of the annular outer wall groove is 4-9 mm, and the thickness S of the end anti-corrosion wear-resistant layer is 2-3 mm.
The utility model provides an oil pipe when using, will connect in order through the coupling and constitute oil pipe column and go down to the oil well in, crude oil is carried to the earth's surface through oil pipe column. The inner wall of the anti-corrosion wear-resistant oil pipe of the utility model is combined with the boronizing layer, which has excellent wear resistance and good corrosion resistance; the end anti-corrosion wear-resistant layers are welded on the end parts of the two ends of the oil pipe body in a build-up mode, and the oil pipe also has good wear resistance and corrosion resistance; annular outer wall grooves are formed in the outer walls of the two ends of the oil pipe body respectively, a pipe wall anti-corrosion wear-resistant layer is formed in the annular outer wall grooves in a build-up welding mode, the outer threads are machined on the pipe wall anti-corrosion wear-resistant layer, and when crude oil permeates into the threaded connection part of the oil pipe and the coupling, the threads at the two ends of the oil pipe body cannot be corroded. The utility model discloses an anticorrosive wear resistant oil pipe can all make anticorrosive wear resistant protection with the structure position of crude oil contact, has good wear-resisting, corrosion resisting property on the whole, has longer life.
The utility model discloses in the length L of annular outer wall recess is 4mm ~ 9mm, because under the normal conditions, the threaded connection distance that crude oil permeates oil pipe and coupling is no longer than 4mm, and the thickness S of tip anticorrosive wearing layer is 2mm ~ 3mm, can be in order to guarantee the wear-resisting corrosion-resistant effect of oil pipe tip.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic view of a front-view half-section structure of an oil pipe body with a boronized layer combined on the inner wall in the prior art, wherein annular outer wall grooves are respectively formed on the outer walls of two ends of the oil pipe body.
FIG. 2 is a view 1 after anti-corrosion wear-resistant layers are deposited on the end parts of the two ends of the oil pipe body and in the grooves of the annular outer wall in a surfacing mode.
Fig. 3 is a main view semi-section structure schematic diagram of the anti-corrosion wear-resistant oil pipe of the utility model.
Fig. 4 is a schematic sectional view taken along line a-a in fig. 3.
Fig. 5 is an enlarged view of the structure at I in fig. 3, which does not show the boronized layer structure on the inner wall of the oil tube.
Detailed Description
Referring to fig. 1-5, the utility model relates to an anticorrosive wear-resisting oil pipe, including oil pipe body 1, combine to have the boronizing layer 2 who adopts the solid method technology on this oil pipe body 1's the inner wall, it has external screw thread 3 to process on the outer wall at oil pipe body both ends, annular outer wall recess 4 has been seted up on the outer wall at oil pipe body 1 both ends respectively, and the tip build-up welding at oil pipe body 1 both ends has tip anti-corrosion wear-resisting layer 5, and build-up welding has the pipe wall anti-corrosion wear-resisting layer 6 that extends to tip anti-corrosion wear-resisting layer 5 in the annular outer wall recess 4 at oil pipe body 1 both ends, and processing has external screw thread 3 on the pipe wall anti-corrosion wear-. The end anticorrosion wear-resistant layer 5 and the pipe wall anticorrosion wear-resistant layer 6 are both nickel-based alloy layers or stainless steel layers. The length L of the annular outer wall groove 4 is 4 mm-9 mm, and the thickness S of the end anti-corrosion wear-resistant layer 5 is 2 mm-3 mm.
The utility modelThe main manufacturing method of the anti-corrosion wear-resistant oil pipe comprises the following steps: firstly, a solid boronizing process is adopted, a compact boronizing layer with the thickness of 0.06 mm-0.15 mm is infiltrated on the inner wall of an oil pipe body, and the structure of the boronizing layer is FeB and Fe2B, the hardness is very high, the wear resistance is excellent, the corrosion resistance and the high-temperature oxidation resistance are good, the boronizing layer and the inner wall of the oil pipe body belong to metallurgical bonding, the bonding is firm, and the falling phenomenon cannot occur; then turning annular outer wall grooves on the outer walls of the two ends of the boronized oil pipe body, as shown in figure 1; then, overlaying nickel-based alloy powder or stainless steel powder in the two end parts of the oil pipe body and the annular outer wall groove by adopting a plasma overlaying machine to form an anti-corrosion wear-resistant layer, as shown in figure 2; finally, the threads are turned integrally as shown in fig. 3.
Claims (3)
1. The utility model provides an anticorrosive wear-resisting oil pipe, has oil pipe body (1), has bonded boronizing layer (2) that adopt solid method technology on the inner wall of this oil pipe body (1), and processing has external screw thread (3), its characterized in that on the outer wall at oil pipe body both ends: annular outer wall recess (4) have been seted up on the outer wall at oil pipe body (1) both ends respectively, the tip surfacing at oil pipe body (1) both ends has tip anti-corrosion wear-resistant coating (5), the surfacing has pipe wall anti-corrosion wear-resistant coating (6) that extend to tip anti-corrosion wear-resistant coating (5) in annular outer wall recess (4) at oil pipe body (1) both ends, processing has on pipe wall anti-corrosion wear-resistant coating (6) at oil pipe body (1) both ends external screw thread (3).
2. An anti-corrosion wear resistant oil pipe according to claim 1, wherein: the end anticorrosion and wear-resistant layer (5) and the pipe wall anticorrosion and wear-resistant layer (6) are both nickel-based alloy layers or stainless steel layers.
3. An anti-corrosion wear resistant oil pipe according to claim 1 or 2, characterized in that: the length L of the annular outer wall groove (4) is 4-9 mm, and the thickness S of the end anti-corrosion wear-resistant layer (5) is 2-3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021223541.8U CN212428625U (en) | 2020-06-29 | 2020-06-29 | Anti-corrosion wear-resistant oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021223541.8U CN212428625U (en) | 2020-06-29 | 2020-06-29 | Anti-corrosion wear-resistant oil pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212428625U true CN212428625U (en) | 2021-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021223541.8U Active CN212428625U (en) | 2020-06-29 | 2020-06-29 | Anti-corrosion wear-resistant oil pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212428625U (en) |
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2020
- 2020-06-29 CN CN202021223541.8U patent/CN212428625U/en active Active
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