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Special threaded joint of oil casing and using method

A special thread and threaded joint technology, which is applied in the direction of casing, drill pipe, earthwork drilling, etc., can solve the problems of easy expansion, leakage, poor stability and sealing performance, and achieve weight reduction and strong compression resistance , the effect of preventing vertical expansion

Inactive Publication Date: 2021-02-12
王刚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the high temperature and high pressure of oil and gas, the inside of the special threaded joint of the existing oil casing is prone to expansion, and it is very easy to cause leakage due to poor stability and sealing

Method used

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  • Special threaded joint of oil casing and using method
  • Special threaded joint of oil casing and using method
  • Special threaded joint of oil casing and using method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Refer to attached Figure 1-5 , a special threaded joint for oil casing provided by the present invention, comprising a threaded pipe body 100, a threaded joint 1 200, a leak-proof ring 1 106, a leak-proof ring 2 300 and a threaded joint 2 400, and the outer surface of the threaded pipe body 100 is installed with The protective strip 101, the inner wall of the threaded pipe body 100 is sleeved with an anti-corrosion layer 102, the outer surface of the threaded pipe body 100 is sleeved with a fixed external thread 103, the outer surface of the threaded pipe body 100 is provided with an anti-expansion external thread 104, and the outer surface of the threaded pipe body 100 is installed There is a reinforcement ring 105, one end of the threaded pipe body 100 is fixedly connected to the leak-proof ring-106, and the outer surface of the threaded pipe body 100 is provided with a leak-proof rib 107, and one side of the leak-proof ring-106 is equipped with an outer tube tube 108...

Embodiment 2

[0044] Refer to attached Figure 6 , a special threaded joint for oil and casing provided by the present invention, including a threaded joint 2 400 and a triangular reinforcement groove 401, specifically, the outer surface of the threaded pipe body 100 is provided with a threaded joint 2 400, and the inner wall of the anti-expansion protrusion 204 is provided with a triangular reinforcement Groove 401, the triangular reinforcement groove 401 is evenly opened on the inner wall of the anti-expansion bump 204, the number of the triangular reinforcement groove 401 is set to two groups, the triangular reinforcement groove 401 is located in the middle of the anti-expansion bump 204, and the triangular reinforcement groove 401 is symmetrical , the threaded pipe body 100 is detachably connected to the threaded joint 2 400, when the threaded pipe body 100 and the threaded joint 2 400 expand laterally, two sets of triangular reinforcement grooves 401 are in the middle position between t...

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Abstract

The invention discloses a special threaded joint for an oil casing and a using method. According to the technical scheme, the special threaded joint comprises threaded pipe bodies, first threaded joint bodies, first leakage-proof rings, second leakage-proof rings and second threaded joint bodies, protective strips are installed on the outer surfaces of the threaded pipe bodies, the inner walls ofthe threaded pipe bodies are sleeved with anti-corrosion layers, the outer surfaces of the threaded pipe bodies are fixedly sleeved with external threads, the outer surfaces of the threaded pipe bodies are provided with anti-expansion external threads, the outer surfaces of the threaded pipe bodies are provided with reinforcing rings, one ends of the threaded pipe bodies are fixedly connected withthe first leakage-proof rings, the outer surfaces of the threaded pipe bodies are provided with leakage-proof edge strips, one sides of the first leakage-proof rings are provided with outer pipe barrels, and one sides of the first leakage-proof rings are fixedly connected with inner pipe barrels. According to the special threaded joint for the oil casing and the using method, the installation isconvenient and rapid, the stability is high, vertical and transverse expansion between the threaded pipe bodies and the threaded joint bodies can be prevented, and the leakage-proof effect is achievedthrough the internal leakage-proof rings.

Description

technical field [0001] The invention relates to the technical field of petroleum industry equipment, in particular to a special threaded joint of an oil casing and a use method thereof. Background technique [0002] HTHP oil and gas wells are also called high-temperature and high-pressure wells. According to the regulations of the International HTHP Cooperation Promotion Association, the formation temperature of oil and gas wells reaches 300°F (149°C), or the formation pressure reaches 15,000psi (103.4Mpa), or the wellhead pressure reaches 10,000psi (68.9 Mpa) and above are called high-temperature and high-pressure wells. If the formation temperature of an oil and gas well reaches 400°F (204°C), or the formation pressure reaches 20,000psi (137.8Mpa), or the wellhead pressure reaches 15,000psi (103.4Mpa), it is called an ultra-high temperature and high pressure well. . [0003] Due to the high temperature and high pressure of oil and gas, the inside of the existing special t...

Claims

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Application Information

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IPC IPC(8): E21B17/08
CPCE21B17/08
Inventor 王刚宋桂会
Owner 王刚
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