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Erosion-prevention drilling and completion integrated wellhead device and mounting method

A wellhead device, drilling and completion technology, applied in wellbore/well components, earthwork drilling, sealing/packing, etc. The effect of avoiding erosion damage and improving erosion resistance

Inactive Publication Date: 2015-05-20
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] An integrated wellhead device for anti-erosion drilling and completion, which solves the erosion damage problem of the bypass section of the multifunctional four-way in the conventional integrated wellhead device for drilling and completion, prevents the multifunctional four-way from piercing and leaking, and ensures the wellhead device Safety

Method used

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  • Erosion-prevention drilling and completion integrated wellhead device and mounting method
  • Erosion-prevention drilling and completion integrated wellhead device and mounting method
  • Erosion-prevention drilling and completion integrated wellhead device and mounting method

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Embodiment 1

[0029] like figure 1 As shown, the integrated wellhead device for anti-erosion drilling and completion includes a multi-functional spool 1, a hard alloy sleeve 2, and a double flange nipple 3. The bypass outlet end of the multi-function cross 1 is tightly connected with the inlet end of the double-flange nipple 3 through the stud bolt 5 and the nut 6; the outlet end of the double-flange nipple 3 is connected with the downstream plate valve 7; the multi-function A cemented carbide sleeve 2 is embedded in the bypass outlet section of the cross 1 and the inlet section of the double flange nipple 3; the bypass outlet end of the multifunctional cross 1 and the flange surface of the double flange nipple 3 have In the annular sealing groove, an O-ring metal ring 4 is used to realize the sealing between the double flange nipple 3 and the multi-functional cross 1, as well as the sealing between the downstream flat valve.

[0030] Two positioning reference lines a and b are marked on t...

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Abstract

The invention provides an erosion-prevention drilling and completion integrated wellhead device and a mounting method and belongs to the technical field of drilling and completion integration. The erosion-prevention drilling and completion integrated wellhead device comprises a multifunctional four-way part, a hard alloy sleeve, and a double-flange short joint, wherein a bypass outlet end of the multifunctional four-way part is connected to the inlet end of the double-flange short joint in a fastening manner through a stud and a nut; the outlet end of the double-flange short joint is connected with a downstream flat valve; the hard alloy sleeve is embedded in both the bypass outlet section of the four-way part and the inlet section of the double-flange short joint; and the bypass outlet end of the multifunctional four-way part and the flange surface of the double-flange short joint are provided with ring-shaped sealing grooves. Sealing between the double-flange short joint and the multifunctional four-way part as well as the downstream flat valve is realized through O-shaped metal ring.

Description

technical field [0001] The invention relates to an anti-erosion drilling and completion integrated wellhead device and an installation method, belonging to the technical field of drilling and completion integration. Background technique [0002] The integrated wellhead device for drilling and completion is mainly used for nitrogen drilling. It adopts multi-functional spool, which can realize the conversion of drilling, testing and gas production without changing the spool. For low-pressure and low-permeability reservoirs, conventional integrated wellhead devices for drilling and completion can basically meet the engineering safety requirements. Severe erosion of the multi-functional four-way bypass section induces hidden dangers to engineering safety. [0003] In order to solve the problem of erosion damage in the bypass section of the multifunctional cross, the existing multifunctional cross is sprayed with a 2 to 3 mm thick anti-erosion alloy layer on the inner wall of th...

Claims

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Application Information

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IPC IPC(8): E21B33/03
CPCE21B33/03
Inventor 胥志雄王春生王延民梁红军李锋刘绘新何江华
Owner PETROCHINA CO LTD