CN212054525U - High-temperature-resistant, corrosion-resistant and hydrogen sulfide-resistant composite sucker rod - Google Patents
High-temperature-resistant, corrosion-resistant and hydrogen sulfide-resistant composite sucker rod Download PDFInfo
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- CN212054525U CN212054525U CN201922318258.7U CN201922318258U CN212054525U CN 212054525 U CN212054525 U CN 212054525U CN 201922318258 U CN201922318258 U CN 201922318258U CN 212054525 U CN212054525 U CN 212054525U
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- stainless steel
- sucker rod
- steel sleeve
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- rod body
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Abstract
The utility model discloses a compound sucker rod of high temperature resistant anticorrosive hydrogen sulfide prevention, including the sucker rod body of rod and stainless steel sleeve, the nonrust steel bushing of tip, the processing of sucker rod body of rod both ends has the external screw thread, middle part intussusception stainless steel sleeve, the both ends and the sucker rod body of rod sealing connection of stainless steel sleeve, a tip nonrust steel bushing is connected respectively at stainless steel sleeve both ends, and is provided with the sealing ring between tip nonrust steel bushing and the stainless steel sleeve for tip nonrust steel bushing and nonrust steel pipe sealing connection. This application can strengthen its corrosion resisting property, can satisfy the intensity performance that the sucker rod required again, and increase of service life makes its processing production efficiency obtain improving simultaneously.
Description
Technical Field
The utility model relates to a sucker rod technical field especially relates to a compound sucker rod of high temperature resistant anticorrosive hydrogen sulfide prevention.
Background
At present, most of oil field production wells adopt sucker rods for oil extraction, the sucker rods are used as key parts in petroleum mechanical oil extraction equipment systems, and the requirements on functions and performance are very strict. In the oil extraction process, the sucker rod string bears the effect of asymmetric cyclic load, and because the depth of the current underground oil pump is generally about two kilometers, and the deepest pump reaches more than four kilometers, the load born by the sucker rod string in an ultra-deep well is also larger, the current upset forging sucker rod cannot meet the exploitation requirement of the ultra-deep well, the breaking accident of the sucker rod is easily caused, the breaking accident of the sucker rod can seriously affect the yield of crude oil, the well repair cost is increased, and the crude oil cost is increased.
Along with the development of oil fields, the proportion of water injection wells, inclined wells, directional wells, horizontal wells and the like is increased day by day, the mineralization degree and the content of corrosive media in well liquid are increased more and more, and various domestic oil fields enter a high-water-content development period and are increasingly corroded. In order to reduce the ground construction cost, the newly added oil well also adopts a highly deviated well development scheme, which causes the serious corrosion problem of an oil pipe and a sucker rod in the exploitation process, increases the well repair cost, and restricts the implementation of cost reduction and efficiency improvement because the components of the underground well fluid are more complex and contain corrosive media, live corrosive microorganisms and hydrogen sulfide, so that the sucker rod can be corroded and damaged in different degrees, the service life of the sucker rod is shortened, and the labor cost and the material cost are increased due to frequent replacement. In order to solve the problems, the stainless steel with good corrosion resistance is adopted as the material of the sucker rod in the industry, however, the hot upsetting performance of the stainless steel material is poor, the forging deformation is large, and the upsetting size is not easy to control. And a novel material is adopted to wrap the rod body to achieve the anti-corrosion effect, but the material has low strength and cannot resist high temperature, so that premature aging and abrasion can occur. How to solve the above problems is urgent.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the high-temperature-resistant, corrosion-resistant and hydrogen sulfide-resistant composite sucker rod can enhance the corrosion resistance, meet the strength performance requirement of the sucker rod under complex well conditions, prolong the service life, improve the production efficiency and save the cost.
In order to realize the purpose of the utility model, the utility model provides a high temperature resistant, corrosion resistant and hydrogen sulfide resistant composite sucker rod, which comprises a sucker rod body, a stainless steel sleeve and a stainless steel sleeve at the end part,
the sucker rod comprises a sucker rod body and is characterized in that external threads are processed at two ends of the sucker rod body, a stainless steel sleeve is sleeved in the middle of the sucker rod body, two ends of the stainless steel sleeve are in sealing connection with the sucker rod body, a tip stainless steel sleeve is sleeved at two ends of the stainless steel sleeve respectively, and a sealing ring is arranged between the tip stainless steel sleeve and the stainless steel sleeve, so that the tip stainless steel sleeve is in sealing connection with the stainless steel pipe.
Wherein the thickness of the stainless steel sleeve is 2mm-3 mm.
Wherein the sealing ring material is polytetrafluoroethylene.
Wherein, a coupling is connected respectively through the external screw thread at sucker rod body both ends, and a sucker rod is connected respectively for its both ends of symmetrical structure to the coupling, the tip of sucker rod is provided with external screw thread torque shoulder, is provided with internal thread torque shoulder in the corresponding coupling, external screw thread torque shoulder and internal thread torque shoulder are 90 with the water flat line contained angle, and interference fit during its operating condition.
The internal thread and the external thread are special threads, the tooth height H of the special threads is 1.575mm, the thread pitch P is 8 teeth/inch, and the taper T is 1: 16.
Compared with the prior art, the utility model has the advantages that,
a) according to the device, the stainless steel sleeve is sleeved on the sucker rod body, the head is upset, the external thread of the rod end is processed after upset, the stainless steel sleeve at the end part is connected, the end part of the stainless steel sleeve is compressed through a hydraulic necking machine, so that the stainless steel sleeve at the end part, the stainless steel sleeve and the sucker rod body are compressed to be in over-win fit to form a whole, the bearing area is increased, the connection strength is improved, and the service life is prolonged;
b) the stainless steel sleeve and the end stainless steel sleeve are sealed by a polytetrafluoroethylene sealing ring, and the end of the sucker rod is connected in a sealing way by a special taper thread coupling so that a well fluid medium cannot contact with the sucker rod, thereby achieving the corrosion resistance;
c) the ductility of the stainless steel sleeve material is superior to that of the sucker rod body, the performance of the sucker rod body cannot be influenced in the working state, the stainless steel sleeve material is common in the market, and the cost is low;
d) the connecting thread is a special tapered thread, has good sealing performance compared with the conventional straight thread, is easy to install and disassemble, is convenient for field operation in oil fields, and has high working efficiency;
e) the torque shoulder is designed, so that the anti-torsion effect under complex well conditions is enhanced, the connection strength is improved, the tightness is enhanced to a certain extent by the interference fit of the torque shoulder, and the sealing effect of the coupling is improved;
e) simple structure, reasonable design, simple processing technology, few procedures, easy operation and high production efficiency.
Drawings
FIG. 1 is a schematic structural diagram of the present application;
FIG. 2 is a schematic view of the external thread torque shoulder at the end of the sucker rod body of the present application;
FIG. 3 is a schematic view of the external thread profile at the end of the sucker rod body according to the present application;
FIG. 4 is a schematic view of the collar of the present application;
in the figure, 1, an external thread, 2, a stainless steel sleeve at the end, 3, a sealing ring, 4, a stainless steel sleeve, 5, a sucker rod body, 6, an external thread torque shoulder, 7, a coupling, 8, an internal thread torque shoulder, 9, an internal thread, a tooth height H, a thread pitch P and a taper T.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that "connected" and words used in this application to express "connected," such as "connected," "connected," and the like, include both direct connection of one element to another element and connection of one element to another element through another element.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when used in this specification the singular forms "a", "an" and/or "the" include "specify the presence of stated features, steps, operations, elements, or modules, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …", "above … …", "above … …", "above", and the like, may be used herein for ease of description to describe the spatial relationship of one component or module or feature to another component or module or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the component or module in use or operation in addition to the orientation depicted in the figures. For example, if a component or module in the figures is turned over, components or modules described as "above" or "above" other components or modules or configurations would then be oriented "below" or "beneath" the other components or modules or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The components or modules may also be oriented in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Examples
As shown in the figures 1-4 of the drawings,
the high temperature resistant, corrosion resistant and hydrogen sulfide resistant composite sucker rod provided by the embodiment comprises a sucker rod body 5, a stainless steel sleeve 4 and a stainless steel sleeve 2 at the end part,
In a preferred embodiment, the stainless steel sleeve 4 has a thickness of 2mm to 3 mm.
In the preferred embodiment, two ends of the sucker rod body 5 are respectively connected with a coupling 7 through external threads 1, the coupling 7 is of a symmetrical structure, two ends of the coupling are respectively connected with a sucker rod, the end part of the sucker rod is provided with an external thread torque shoulder 6, an internal thread torque shoulder 8 is arranged in the corresponding coupling 7, included angles between the external thread torque shoulder 6 and the internal thread torque shoulder 8 and a horizontal line are both 90 degrees, and the two ends are in interference fit in the working state.
In this application, the helicitic texture of external screw thread and internal thread has two kinds of schemes:
one is a standard thread: the advantages that the structure of the original national standard and American standard sucker rod is not changed, the sucker rod can be matched with any standard coupling for use, and the universality is stronger;
the second is special thread: the tooth height H of the self-designed special thread is 1.575mm, the thread pitch P is 8 teeth/inch, the taper T is 1:16, and a 90-degree torque shoulder; compared with the conventional straight threads, the sealing performance is good, the thread is easily screwed up and down, the field operation in the oil field is convenient, the working efficiency is high, the anti-torsion effect under the complex well condition is enhanced, and the connection strength is improved.
It should be noted that, in the following description,
(1) sucker rod body material: meets all the material and corresponding mechanical property requirements of SY/T5029-2013 sucker rod standard requirements, and the chemical components meet the requirements of GB/T26075-.
(2) The stainless steel sleeve and the stainless steel sleeve are made of materials: 022Cr25Ni7Mo3WCuN duplex stainless steel. High hardness in a quenched state and good corrosion resistance. The duplex stainless steel has good chloride stress corrosion resistance under low stress. The stainless steel has good resistance in industrial media containing oil chloride and hydrogen sulfide. Aluminum-containing duplex stainless steel may be used.
(3) Sealing ring material: polytetrafluoroethylene. The material has excellent chemical stability and corrosion resistance, is one of the best materials with corrosion resistance, can resist all other chemicals except molten alkali metal, chlorine trifluoride, chlorine pentafluoride and liquid fluorine, does not change after being boiled in aqua regia, and is widely applied to various occasions needing acid-base resistance and organic solvents. The sealing performance, high lubrication non-stick performance, electric insulation performance, good ageing resistance and excellent temperature resistance (can work for a long time at the temperature of between 250 ℃ and 180 ℃), and the rapid cooling and heating or the cold and hot alternate operation is allowed.
The processing procedure of this application is as follows:
a) a rod body of the sucker rod is provided with a stainless steel sleeve and a polytetrafluoroethylene sealing ring;
b) upsetting two ends of the sucker rod body;
c) carrying out heat treatment on the rod end of the sucker rod;
d, processing external threads on the rod end of the sucker rod;
e) installing a stainless steel sleeve on the rod end of the sucker rod;
f) compressing and closing the stainless steel sleeve;
g) installing a coupling;
h) and (6) packaging.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A high-temperature resistant, corrosion-resistant and hydrogen sulfide-resistant composite sucker rod which is characterized by comprising a sucker rod body (5), a stainless steel sleeve (4) and a stainless steel sleeve (2) at the end part,
the sucker rod is characterized in that external threads (1) are processed at two ends of a sucker rod body (5), the middle part is sleeved with a stainless steel sleeve (4), two ends of the stainless steel sleeve (4) are connected with the sucker rod body (5) in a sealing mode, two ends of the stainless steel sleeve (4) are respectively sleeved with one end stainless steel sleeve (2), and a sealing ring (3) is arranged between the end stainless steel sleeve (2) and the stainless steel sleeve (4) to enable the end stainless steel sleeve (2) to be connected with the stainless steel sleeve (4) in a sealing mode.
2. The high-temperature-resistant anticorrosion hydrogen sulfide-proof composite sucker rod as claimed in claim 1, wherein the thickness of the stainless steel sleeve (4) is 2mm-3 mm.
3. The high-temperature-resistant corrosion-resistant hydrogen sulfide-proof composite sucker rod of claim 1, wherein the sealing ring (3) is made of polytetrafluoroethylene.
4. The high temperature resistant anticorrosion hydrogen sulfide-proof composite sucker rod of claim 1, wherein the sucker rod body (5) both ends are respectively connected with a coupling (7) through external threads (1), the coupling (7) is a symmetrical structure, the two ends of the coupling are respectively connected with a sucker rod, the end of the sucker rod is provided with an external thread torque shoulder (6), an internal thread torque shoulder (8) is arranged in the corresponding coupling (7), the external thread torque shoulder (6) and the internal thread torque shoulder (8) are both 90 degrees from a horizontal line, and are in interference fit in the working state.
5. The compound sucker rod of claim 1, wherein the internal thread (9) and the external thread (1) have a tooth height (H) of 1.575mm, a thread pitch (P) of 8 teeth/inch, and a taper (T) of 1: 16.
6. The composite sucker rod of claim 1, wherein the stainless steel sleeve and the stainless steel sleeve at the end are made of duplex stainless steel 022Cr25Ni7Mo3 WCuN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922318258.7U CN212054525U (en) | 2019-12-22 | 2019-12-22 | High-temperature-resistant, corrosion-resistant and hydrogen sulfide-resistant composite sucker rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922318258.7U CN212054525U (en) | 2019-12-22 | 2019-12-22 | High-temperature-resistant, corrosion-resistant and hydrogen sulfide-resistant composite sucker rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212054525U true CN212054525U (en) | 2020-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922318258.7U Active CN212054525U (en) | 2019-12-22 | 2019-12-22 | High-temperature-resistant, corrosion-resistant and hydrogen sulfide-resistant composite sucker rod |
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| Country | Link |
|---|---|
| CN (1) | CN212054525U (en) |
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- 2019-12-22 CN CN201922318258.7U patent/CN212054525U/en active Active
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