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Kelly cock valve for marine oilfield drilling and production

A technology of kelly and cock valves, which is applied in earthwork drilling, wellbore/well valve devices, wellbore/well components, etc., to improve the service life, reduce the risk of accidents, and facilitate offshore oil well operations

Active Publication Date: 2021-10-15
MUDANJIANG CITY LINHAI PETROLEUM REFLOATATION INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a kelly cock valve used for drilling in offshore oilfields, which has the advantages of easy opening and closing, high service life, easy replacement of internal seals and effective control of the opening and closing of the cock valve during replacement, and solves the problems in the background technology. technical issues

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  • Kelly cock valve for marine oilfield drilling and production
  • Kelly cock valve for marine oilfield drilling and production
  • Kelly cock valve for marine oilfield drilling and production

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Embodiment Construction

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0019] see Figure 1-5 A kelly cock valve used for offshore oilfield drilling, including a pipe body 1, the middle part of the pipe body 1 is provided with a transverse channel connected to the inner cavity in the middle, and the two ends of the transverse channel are respectively threaded with positioning side covers 101 And the adjustment side cover 102, the outer sleeve tube 2 is movable in the horizontal channel, the outer side of the outer cover tube 2 is...

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Abstract

The invention relates to the field of petroleum drilling and production equipment, and discloses a kelly cock valve for marine oilfield drilling and production. The kelly cock valve comprises a pipe body, wherein a transverse through groove communicating with a middle inner cavity of the pipe body is formed in the pipe body, an outer sealing sleeve is movably sleeved with the transverse through groove, an inner sealing rotary column is sleeved with an inner bearing of the outer sealing sleeve, a middle through hole located in the middle inner cavity of the pipe body is formed in the inner sealing rotary column, a linkage rotary rod is arranged on one side of the transverse through groove, and the linkage rotary rod can drive the inner sealing rotary column to rotate. According to the kelly cock valve for marine oilfield drilling and production, through the structural design that the transverse through groove communicating with the middle inner cavity of the pipe body is formed in the pipe body, and the outer sealing sleeve and the inner sealing rotary column are arranged in the transverse through groove, when the kelly cock valve is controlled to be opened or closed, the bearing is used for bearing pressure all the time, an operator can conveniently open or close the plug valve, and therefore when the emergency situations such as blowout or well kick happen, the operator can conveniently and rapidly close the plug valve, and the accident risk is reduced.

Description

technical field [0001] The invention relates to the field of oil drilling and production equipment, in particular to a kelly cock valve used for offshore oil field drilling. Background technique [0002] The kelly cock is a common blowout prevention tool. In drilling operations, in order to avoid the occurrence of blowout accidents, kelly cocks are assembled at the upper and lower ends of the kelly. The existing kelly There are valve ball, valve seat and inner ring inside the kelly cock valve. Use a special wrench for the kelly cock valve to turn 90 degrees according to the instructions to make the internal ball valve rotate, so that the kelly cock valve can be opened or closed. closure. [0003] However, when the existing kelly cock valve is opened or closed under the action of high pressure in the well, when the rotating shaft is turned, due to the huge friction force generated by the huge pressure difference, it is difficult to rotate the spherical valve core, which make...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B34/06
CPCE21B34/06E21B2200/06
Inventor 刘婉君
Owner MUDANJIANG CITY LINHAI PETROLEUM REFLOATATION INSTR
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