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Special thread female joint of riser for marine drilling exploitation

A water-resisting conduit and thread nut technology, which is applied to the threaded connection structure and the field of marine drills using special threaded female joints for water-resisting conduits, can solve the problems of sealing, connection strength and torsion resistance that cannot meet the mining environment conditions, and achieve Enhance the auxiliary sealing effect, ensure the sealing effect, and enhance the sealing effect

Inactive Publication Date: 2016-11-23
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 thread female joint of riser for marine drilling exploitation
  • Special thread female joint of riser for marine drilling exploitation
  • Special thread female joint of riser for marine drilling exploitation

Examples

Experimental program
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Embodiment

[0028] Such as 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 th...

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PUM

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Abstract

The invention provides a special thread female joint of a riser for marine drilling exploitation. The female joint is connected with the riser in a welding mode, the outer diameter of the female joint is equal to that of a riser body, and a sealing slope is arranged at the front end of the female joint. A matched conical surface sealing structure is arranged at the tail end of the female joint and comprises an inner thread sealing conical surface. According to the special thread female joint of the riser for marine drilling exploitation, the sealing slope arranged on an inner thread joint body and an O-shaped sealing ring structure arranged on an outer thread joint body are in interference fit all the time in the use process, and the auxiliary sealing effect is enhanced through elastic sealing; meanwhile, an inner torque shoulder arranged on the inner thread joint body and an outer torque shoulder arranged on the outer thread joint body are in interference fit, the anti-torque capability is enhanced, and the connecting strength is improved.

Description

technical field [0001] The invention belongs to the technical field of drilling equipment for oil exploitation, and relates to the screw connection structure technology of drilling equipment, in particular to a special threaded female 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 riser: [0004] (1) One is welding. The advantage is that the outer diameter of the joint is the same as that of the conduit, which facilitates the hammering of the conduit and ensures the adhesion of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/08
CPCE21B17/085
Inventor 张国辉
Owner TIANJIN DEHUA GASOLINEEUM EQUIP MFG