CN114683563A - Machining and mounting method of oil production pipe joint and oil production pipe joint - Google Patents
Machining and mounting method of oil production pipe joint and oil production pipe joint Download PDFInfo
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- CN114683563A CN114683563A CN202011558908.6A CN202011558908A CN114683563A CN 114683563 A CN114683563 A CN 114683563A CN 202011558908 A CN202011558908 A CN 202011558908A CN 114683563 A CN114683563 A CN 114683563A
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- joint
- production pipe
- oil production
- pipe body
- thread
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
- B29C65/561—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits using screw-threads being integral at least to one of the parts to be joined
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
- F16L15/04—Screw-threaded joints; Forms of screw-threads for such joints with additional sealings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a processing and mounting method of an oil extraction pipe joint and the oil extraction pipe joint. The processing and mounting method of the oil extraction pipe joint comprises the following steps: the method comprises the following steps that a nonmetal oil production pipe body is made of a thermoplastic and high-temperature-resistant material, and the thickness of the end part of the oil production pipe body is larger than that of the central area of the oil production pipe body; heating the end part of the oil production pipe body, and extruding the end part of the oil production pipe body in a semi-solid state to form a joint thread when the end part is heated to a preset temperature; and cooling the joint threads, connecting the oil production pipe body with an external pipeline through the joint threads, and sealing the gap at the position of the joint threads. The oil production pipe joint comprises an oil production pipe body and a joint thread, wherein the oil production pipe body and the joint thread are non-metal integrally-formed parts. The invention has the advantages of good bearing capacity, high connection strength, good sealing performance and the like.
Description
Technical Field
The invention relates to the field of oil production pipelines, in particular to a machining and mounting method of an oil production pipe joint and the oil production pipe joint.
Background
The environment of the oil pipe in the service process is quite harsh, the stress is quite complex, such as axial force, internal and external pressure, bending, temperature and other loads, and the external loads can cause certain influence on the performance of the oil pipe, even cause the connection failure and the sealing failure of the oil pipe. Meanwhile, in the process of putting the oil pipe into the well, improper screwing-up torque can also cause joint failure and influence the use performance of the oil pipe joint, and excessive torque can cause excessive plastic deformation of a torque shoulder or a sealing surface and cause connection failure or sealing failure; too little torque will result in insufficient contact stress on the seal faces, resulting in leakage of the particular threaded tubing joint.
Meanwhile, chinese patent 201510053262.9 discloses a non-metal coiled tubing connector, wherein a plurality of steel wires are arranged in the layer wall of the outermost coating layer of the non-metal coiled tubing at intervals along the circumferential direction, comprising: the joint body is of a cylindrical structure, the cylinder wall at one end of the joint body is cut along the thickness direction to form an upper part and a lower part, and teeth are arranged on the opposite surfaces of the two parts; and the fixing body is annular, is sleeved on the periphery of the joint body and is provided with at least one through hole for one of the steel wires to pass through. The joint adopts the combination of buckling connection, steel wire fixed connection and resin pouring connection, so that the bearing capacity and the bearing capacity of the joint are greatly improved, but the structural design of the connection part is realized through the connection of steel wires and the like, the structure is complex, the operation is inconvenient, and the reliability is poor.
The chinese invention patent 201810731094.8 discloses a cable embedded non-metal continuous pipe measurement and control layered water injection system and an operation method thereof, which mainly explains the field application process technology of the cable embedded non-metal continuous pipe. One end of the flexible composite continuous pipe is connected with one end of the intelligent cabled water distributor through a joint, the other end of the intelligent cabled water distributor is connected with the screen pipe plug and the double-acting valve, the other end of the flexible composite continuous pipe is connected with the injection machine, and a preset cable in the flexible composite continuous pipe is connected with the PC through the ground controller. The invention designs a nonmetal field application method with a cable embedded in the key point, mainly focuses on a connecting object and a field operation process, and does not describe the joint structure in detail. Therefore, the existing oil production pipe joint has the problems of low strength, easy leakage, complex structure, inconvenient operation and the like of the oil production pipe joint, and cannot ensure the production efficiency and the production safety.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art and provide the oil extraction pipe joint and the processing and mounting method thereof with good bearing capacity, high connection strength and good sealing performance.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a processing and mounting method for a production pipe joint comprises the following steps:
1) the method comprises the following steps that a nonmetal oil production pipe body is made of a thermoplastic and high-temperature-resistant material, and the thickness of the end part of the oil production pipe body is larger than that of the central area of the oil production pipe body;
2) heating the end part of the oil production pipe body, and extruding the end part of the oil production pipe body in a semi-solid state to form a joint thread when the end part is heated to a preset temperature;
3) and cooling the joint threads, connecting the oil production pipe body with an external pipeline through the joint threads, and sealing the gap at the position of the joint threads.
As a further improvement of the above technical solution:
in the step 1), the thermoplastic and high-temperature resistant material for preparing the oil production pipe body is polyether ketone.
The thickened length of the end part of the oil production pipe body is the thickened length which is selected by taking the sufficient connection strength and the pressure resistance as standards at the connection position as the guarantee.
In the step 2), when the heating is carried out to the preset temperature, heat preservation treatment is carried out, and then the end part of the oil production pipe body is extruded.
The preset temperature for heating the oil production pipe body is 380-420 ℃, the temperature is raised to the preset temperature at the speed of 50-70 ℃/min, and the temperature is kept for 10-20 min.
In the step 2), the end part of the oil production pipe body is extruded by adopting a mould to form a joint thread with a trapezoidal tooth shape.
In step 3), a laser or sealing grease is used to seal the gap at the threaded position of the joint.
In the step 3), the joint threads are cooled in a water cooling mode.
The oil production pipe joint manufactured by the machining and mounting method comprises an oil production pipe body and joint threads, wherein the oil production pipe body and the joint threads are non-metal integrally-formed parts.
As a further improvement of the above technical solution:
the central line of the oil production pipe body is superposed with the central line of the joint thread, and the oil production pipe body is connected with the joint thread through a conical transition section.
The connector thread is a trapezoidal thread, the crest face of the trapezoidal thread is obliquely arranged, and arc chamfers are arranged at two ends of the crest of the trapezoidal thread.
Compared with the prior art, the invention has the advantages that:
(1) the invention adopts the thermoplastic and high temperature resistant material to manufacture the oil production pipe body, heats and extrudes the end part of the oil production pipe body to form the joint thread, so that the oil production pipe body and the joint thread are non-metal integrated parts, at the moment, the oil production pipe body and the joint thread have the same expansion coefficient and the consistent deformation trend, thereby greatly improving the bearing capacity and the connection strength of the oil production pipe joint, reducing the failure risk of the oil pipe under the working condition and ensuring the safe and reliable production.
(2) The nonmetal oil production pipe body is made of thermoplastic and high-temperature-resistant materials, so that the oil production pipe joint has better high-temperature resistance, high-pressure resistance and corrosion resistance, and the service life of the oil production pipe joint is prolonged.
(3) The invention cools the joint thread after heating, and seals the gap of the joint thread position after the oil production pipe body is connected with the external pipeline, thereby ensuring the sealing property between the oil production pipe body and the external pipeline and reducing the loss caused by the leakage of the oil production pipe joint.
(4) The invention has an integrated structure, simple structure and easy operation, and greatly improves the production efficiency while saving the material cost.
The invention considers the influence factors for controlling the failure and leakage of the oil extraction pipe joint, and changes the processing and mounting method of the oil extraction pipe joint, so that the bearing capacity, the connection strength and the sealing performance of the oil extraction pipe joint are greatly improved, the high temperature resistance, the high pressure resistance and the corrosion resistance are good, the loss caused by the failure and the failure of the oil extraction pipe joint is greatly reduced, and the oil extraction pipe joint can still safely and reliably run in a severe working environment. The production tubing joint of the present invention also has the advantages described above.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
fig. 1 is a flow chart of a method for manufacturing and installing a riser joint according to the present invention.
Fig. 2 is a schematic view of the construction of the production tubing joint of the present invention.
FIG. 3 is an enlarged schematic view of the threads of the inventive connection.
Fig. 4 is an enlarged schematic view of a portion a of fig. 2.
The reference numerals in the figures denote:
1. an oil pipe joint; 11. a production pipe body; 12. a joint thread; 121. chamfering with an arc; 13. a tapered transition section; 2. an external pipe; 3. a seal ring; 4. u type sealing washer.
Detailed Description
The invention will be described in further detail with reference to the drawings and specific examples, without thereby limiting the scope of the invention.
As shown in fig. 1, the method for processing and installing the oil recovery pipe joint of the present embodiment includes the following steps:
1) a nonmetal oil production pipe body 11 is made of a thermoplastic and high-temperature-resistant material, and the thickness of the end part of the oil production pipe body 11 is larger than that of the central area of the oil production pipe body 11;
2) heating the end part of the oil production pipe body 11, and extruding the end part of the oil production pipe body 11 in a semi-solid state to form a joint thread 12 when the end part is heated to a preset temperature;
3) and cooling the joint thread 12, connecting the oil production pipe body 11 with the external pipeline 2 through the joint thread 12, and sealing the gap at the position of the joint thread 12.
The invention considers the influence factors for controlling the failure and leakage of the oil extraction pipe joint 1, and changes the processing and mounting method of the oil extraction pipe joint 1, so that the bearing capacity, the connection strength and the sealing performance of the oil extraction pipe joint 1 are greatly improved, the high temperature resistance, the high pressure resistance and the corrosion resistance are good, the loss caused by the failure and the failure of the oil extraction pipe joint 1 is greatly reduced, the oil extraction pipe joint 1 can still safely and reliably operate in a severe working environment, and the high-efficiency work under the conditions of high temperature and high strength (more than 200 ℃ and 100MPa) is realized.
Specifically, the oil production pipe body 11 is made of thermoplastic and high-temperature-resistant materials, and the end part of the oil production pipe body 11 is directly heated and extruded to form the joint threads 12, so that the oil production pipe body 11 and the joint threads 12 are non-metal integrated parts, and at the moment, the oil production pipe body 11 and the joint threads 12 have the same expansion coefficient and the same deformation tendency, so that the bearing capacity, the bearing capacity and the connection strength of the oil production pipe joint 1 are greatly improved, the failure risk of an oil pipe under the working condition is reduced, and the safe and reliable production is ensured. The nonmetal oil production pipe body 11 is made of thermoplastic and high-temperature-resistant materials, so that the oil production pipe joint 1 is better in high-temperature resistance, high-pressure resistance and corrosion resistance, and the service life of the oil production pipe joint 1 is prolonged. According to the invention, the joint thread 12 is cooled after heating, and the gap at the position of the joint thread 12 is sealed after the oil production pipe body 11 is connected with the external pipeline 2, so that the sealing performance between the oil production pipe body 11 and the external pipeline 2 is ensured, and the loss caused by leakage of the oil production pipe joint 1 is reduced. Meanwhile, the invention has an integrated structure, simple structure and easy operation, and greatly improves the production efficiency while saving the material cost.
In this embodiment, in step 1), the thermoplastic and high temperature resistant material used to form the production pipe body 11 is polyetherketone. The oil extraction pipe joint 1 has good high temperature resistance, high pressure resistance and corrosion resistance, and the service life of the oil extraction pipe joint 1 is prolonged.
Further, in step 1), the thickened length of the end part of the oil production pipe body 11 is the thickened length selected as the standard for ensuring that the connecting position has enough connecting strength and pressure resistance. The end part of the oil production pipe body 11 is thickened to provide a space for extrusion forming of the joint thread 12; the thickened length of the end part of the oil production pipe body 11 enables the oil production pipe body 11 and the external pipeline 2 to have enough connection area, so that the pipe bodies can be firmly connected, and the oil production pipe joint 1 is guaranteed to have enough connection strength and pressure resistance.
In this embodiment, the oil production pipe body 11 is a cylindrical structure, and the thickened length of the end of the oil production pipe body 11 is 30-40 cm. In other embodiments, the thickened length of the end of the riser body 11 can be adjusted according to the length of the riser body 11, as long as sufficient connection strength and pressure resistance between the bodies are ensured.
Further, in step 2), when heating to a preset temperature, performing heat preservation treatment, and then extruding the end of the production pipe body 11. The heat preservation treatment enables the end part of the oil production pipe body 11 to be more fully melted, and the forming effect of the subsequent joint thread 12 is ensured.
In this embodiment, the preset temperature for heating the oil production pipe body 11 is 400 ℃, the temperature is raised to the preset temperature at a speed of 60 ℃/min, and the temperature is maintained for 15 min. Which enables the end of the heating oil production pipe body 11 to be heated up to a molten state quickly and be sufficiently molten. In other embodiments, the preset temperature, the temperature rising speed and the heat preservation time are only required to ensure that the end of the oil production pipe body 11 is sufficiently melted, for example, the preset temperature for heating the oil production pipe body 11 can be set to 380-420 ℃, the temperature rising speed can be set to 50-70 ℃/min, and the heat preservation time can be set to 10-20 min.
Further, in step 2), a die is used to extrude the end of the production pipe body 11 to form the joint thread 12 with a trapezoidal thread form. The oil production pipe body 11 still has enough connection strength and bearing capacity when made of non-metal materials; meanwhile, the temperature resistance of the die needs to adapt to the heating temperature of the end part of the oil production pipe body 11.
Further, in the step 3), the laser is adopted to seal the gap at the position of the joint thread 12 so as to ensure the sealing performance between the oil production pipe body 11 and the external pipeline 2 and reduce the loss caused by the leakage of the oil production pipe joint 1. In this embodiment, laser sealing with a power of 180W is employed. In other embodiments, a sealing grease may be used to seal the gap at the location of the joint threads 12.
In this embodiment, in step 3), the joint thread 12 is cooled by water cooling, so that the joint thread 12 is effectively cooled and reliably connected with the external pipe 2.
As shown in fig. 2, the present embodiment shows a production pipe joint 1 manufactured by a method for processing and installing the production pipe joint 1, wherein a production pipe body 11 and a joint thread 12 are formed as a non-metal integral molding. The oil production pipe joint 1 of the invention also has the advantages of the processing and mounting method of the oil production pipe joint, the oil production pipe joint 1 manufactured by the processing and mounting method of the invention can effectively work under the conditions that the temperature is higher than 200 ℃ and the pressure reaches 100MPa, and meanwhile, the structure is simple and the material is saved.
Further, the joint threads 12 are rectangular and wide-toothed and have inclined angles, which makes the riser body 11 still have sufficient connection strength and bearing capacity when made of non-metallic materials. Meanwhile, the tooth width and the height of the rectangular wide tooth shape should ensure the bearing capacity and the connection strength of the joint thread 12. In other embodiments, the thread shape of the joint thread 12 may be an arc-shaped joint thread, as long as it can ensure sufficient connection strength and bearing capacity in a non-metal state. Further, as shown in fig. 3, the joint thread 12 is a trapezoidal thread. The oil production pipe body 11 still has enough connection strength and bearing capacity when made of non-metal materials. Meanwhile, the tooth width and the height of the trapezoidal thread should ensure the bearing capacity and the connection strength of the joint thread 12. In other embodiments, the thread shape of the joint thread 12 may be an arc-shaped joint thread, as long as it can ensure sufficient connection strength and bearing capacity in a non-metal state. Meanwhile, the crest surfaces of the trapezoidal threads are obliquely arranged, so that the oil pipe joint 1 and the external pipeline 2 are limited mutually, and the tripping phenomenon is avoided. Arc chamfers 121 are arranged at two ends of the crest of the trapezoidal thread 12 to prevent the joint thread 12 from being collided and damaged. In this embodiment, trapezoidal thread's left end inclination is 2, and right-hand member inclination is 3, and crest face inclination is 2 in other embodiments, and trapezoidal thread's inclination and crest face inclination can adjust according to actual conditions. Further, as shown in fig. 4, the centerline of the production tubing 11 coincides with the centerline of the joint thread 12, and the production tubing 11 and the joint thread 12 are connected to each other by a tapered transition section 13. It makes the both ends of oil production pipe body 11 thicken gradually, helps machine-shaping joint screw thread 12. In this embodiment, the angle of the tapered transition section 13 is 10 °, and in other embodiments, the joint thread 12 can be adjusted according to actual conditions.
Further, as shown in fig. 1, a seal ring 3 and a U-shaped seal ring 4 are provided between both ends of the joint thread 12 and the outer pipe 2. A sealing convex ring is arranged on the joint thread 12, and the U-shaped sealing ring 4 is in sealing fit with the sealing convex ring. The arrangement of the sealing ring 3 and the U-shaped sealing ring 4 realizes effective sealing between the oil pipe joint 1 and the external pipeline 2. While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A machining and mounting method for a production pipe joint is characterized by comprising the following steps:
1) the method comprises the following steps that a nonmetal oil production pipe body is made of a thermoplastic and high-temperature-resistant material, and the thickness of the end part of the oil production pipe body is larger than that of the central area of the oil production pipe body;
2) heating the end part of the oil production pipe body, and extruding the end part of the oil production pipe body in a semi-solid state to form a joint thread when the end part is heated to a preset temperature;
3) and cooling the joint threads, connecting the oil production pipe body with an external pipeline through the joint threads, and sealing the gap at the position of the joint threads.
2. The method for manufacturing and installing the production pipe joint according to claim 1, wherein in the step 1), the thermoplastic and high-temperature resistant material for manufacturing the production pipe body is polyether ketone.
3. The method for manufacturing and installing a riser joint according to claim 1, wherein the thickened length of the end of the riser body is a thickened length selected on the basis of ensuring sufficient connection strength and pressure resistance of the connection position.
4. The method for manufacturing and installing the production string joint according to any one of claims 1 to 3, wherein in the step 2), when the heating is carried out to a preset temperature, a heat preservation treatment is carried out, and then the end of the production string pipe body is extruded.
5. The method for machining and installing the oil production pipe joint according to any one of claims 4, wherein the preset temperature for heating the oil production pipe body is 380-420 ℃, the temperature is raised to the preset temperature at the speed of 50-70 ℃/min, and the temperature is kept for 10-20 min.
6. The method for manufacturing and installing the riser joint according to any one of claims 1 to 3, wherein in the step 2), a die is used for extruding the end of the riser pipe body to form the joint thread with a trapezoidal thread profile.
7. The method for manufacturing and installing the riser joint according to any one of claims 1 to 3, wherein in the step 3), a laser or sealing grease is used for sealing the gap at the threaded position of the joint.
8. A production pipe joint manufactured by the machining and installing method according to any one of claims 1 to 7, characterized by comprising a production pipe body and joint threads, wherein the production pipe body and the joint threads are integrally formed non-metal parts.
9. The production tubing joint of claim 8, wherein the centerline of the production tubing body coincides with the centerline of the joint thread and the production tubing body and the joint thread are interconnected by a tapered transition.
10. The production tubing joint of claim 8, wherein the joint thread is a trapezoidal thread, the crest surface of the trapezoidal thread is inclined, and the two ends of the crest of the trapezoidal thread are provided with circular arc chamfers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011558908.6A CN114683563A (en) | 2020-12-25 | 2020-12-25 | Machining and mounting method of oil production pipe joint and oil production pipe joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011558908.6A CN114683563A (en) | 2020-12-25 | 2020-12-25 | Machining and mounting method of oil production pipe joint and oil production pipe joint |
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| Publication Number | Publication Date |
|---|---|
| CN114683563A true CN114683563A (en) | 2022-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011558908.6A Pending CN114683563A (en) | 2020-12-25 | 2020-12-25 | Machining and mounting method of oil production pipe joint and oil production pipe joint |
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| CN (1) | CN114683563A (en) |
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| CN106838508A (en) * | 2016-12-27 | 2017-06-13 | 重庆永高塑业发展有限公司 | Plastics pipe connecting structure and its processing method |
| CN210440715U (en) * | 2019-08-28 | 2020-05-01 | 天津市盛源茂科技有限公司 | Automobile oil pipe joint |
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2020
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Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040017081A1 (en) * | 2002-07-06 | 2004-01-29 | Simpson Neil Andrew Abercrombie | Coupling tubulars |
| US20060001259A1 (en) * | 2004-05-17 | 2006-01-05 | Carter Robert V Jr | Mechanical and coil fusion combination seal |
| CN101195272A (en) * | 2008-01-08 | 2008-06-11 | 于鹏青 | Plastics pipe interface male thread shaping technique and equipment |
| CN103292075A (en) * | 2013-06-04 | 2013-09-11 | 无锡金顶石油管材配件制造有限公司 | Petroleum pipeline with guide groove structures |
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