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Special water insulation guide tube screwed joint for ocean drilling and exploitation

A technology of riser and special thread, used in drill pipe, earthwork drilling, drill pipe, etc., can solve the problems of tightness, connection strength and torsion resistance that cannot meet the conditions of mining environment, and achieve enhanced tightness, Guaranteed sealing effect

Inactive Publication Date: 2017-02-22
TIANJIN DEHUA GASOLINEEUM EQUIP MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Common joints cannot meet the needs of oil and gas wells with harsh environmental conditions in terms of sealing, connection strength and torsion resistance.

Method used

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  • Special water insulation guide tube screwed joint for ocean drilling and exploitation
  • Special water insulation guide tube screwed joint for ocean drilling and exploitation
  • Special water insulation guide tube screwed joint for ocean drilling and exploitation

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Embodiment

[0025] like figure 1 , figure 2 , image 3 As shown, the embodiment of the present invention discloses a special threaded joint for a marine drill using a water riser conduit, which is arranged at both ends of the water riser conduit, including an internal threaded joint 1 and an external threaded joint 3, and the joints at both ends are connected to the conduit in the form of butt welding. connected with each other, the outer diameter of the inner threaded joint 1 and the outer threaded joint 3 are the same, and the same as the outer diameter of the riser conduit. Because the outer diameter is the same, compared with the joint with shoulder structure, the frictional resistance of the outer wall of the conduit is smaller. It makes it easier for the conduit to be hammered into the effective depth, and enhances the adhesion of the formation to the outer wall of the conduit, correspondingly increasing the weight that the conduit can support, and at the same time improving the o...

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PUM

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Abstract

The invention provides a special water insulation guide tube screwed joint for ocean drilling and exploitation. An elastic sealing structure is arranged at the thread tail end of an external thread joint body, and the external thread joint body comprises a sealing ring groove and an O-shaped sealing ring, wherein the O-shaped sealing ring is arranged in the sealing ring groove. A sealing oblique face matched with the O-shaped sealing ring is arranged at the front end of an internal thread joint body. Matched conical face sealing structures are arranged at the tail end of the internal thread joint body and the front end of the external thread joint body, and each conical face sealing structure comprises an internal thread sealing conical face and an external thread sealing conical face. According to the special water insulation guide tube screwed joint, the sealing oblique face arranged on the internal thread joint body and the O-shaped sealing ring structure arranged on the external thread joint body are always in interference fit during use, and the auxiliary sealing effect is improved through an elastic seal. Meanwhile, an internal torque shoulder arranged on the internal thread joint body and an external torque shoulder arranged on the external thread joint body are in interference fit, so that the anti-torque capacity is improved, and the connection strength is improved.

Description

technical field [0001] The invention belongs to the technical field of drilling equipment for oil exploitation, and relates to the threaded connection structure technology of drilling equipment, in particular to a special threaded joint of a water-resisting conduit used in marine drilling. Background technique [0002] Riser is a kind of equipment used in offshore oil drilling operations. The main function is to establish a drilling fluid circulation channel during drilling to support the weight of the casing and the wellhead Christmas tree. The entry method is generally divided into drilling type and hammer entry type. [0003] In the development of oil and gas fields, the hammer-in type is often used. There are generally two connection methods for the hammer-in type water riser: (1) One is the welding method. The advantage is that the outer diameter of the joint is the same as that of the pipe, which is convenient for the pipe. Hammering and ensuring the adhesion of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/02
CPCE21B17/02
Inventor 张国辉
Owner TIANJIN DEHUA GASOLINEEUM EQUIP MFG