An oil and gas wellhead and casing head integrated device

A casing head, oil and gas technology, applied in wellbore/well valve devices, wellbore/well parts, measurement, etc., can solve the problems of sealing, pressure relief and fluid injection, etc., to improve digital management and design Novelty, workload reduction effect

Active Publication Date: 2022-04-19
淮安市井神钻采机具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In view of the above, the existing casing head is not perfect in terms of sealing, pressure relief and liquid injection. Therefore, it is necessary for us to study a more perfect casing head

Method used

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  • An oil and gas wellhead and casing head integrated device
  • An oil and gas wellhead and casing head integrated device

Examples

Experimental program
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Effect test

specific Embodiment

[0042] In actual use, when the pressure in the pressure insurance observer shows high pressure, slowly open the pressure protection valve to make the pressure value on the pressure gauge rise slowly. When the pressure value rises to exceed the pre-pressure pressure, open The pressure relief valve discharges the high-pressure gas or liquid in the annular space until the pressure on the pressure gauge shows the pre-pressure value range, and then closes the pressure protection valve and the pressure relief valve; when the pressure in the pressure insurance observer shows as When the pressure is low, open the pressure protection valve to increase the pressure value on the pressure gauge. When the pressure value shows a pressure lower than the pre-pressure, the filling machine will fill the pressure gauge with a pressure 2Mpa-5Mpa higher than the pressure value displayed. Fill the annular space with mud or balance fluid through the opened injection valve. When the pressure on the pr...

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PUM

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Abstract

The invention discloses an integrated device for a casing head and an oil and gas wellhead, comprising a base, a casing head body arranged on the base, slips arranged on the casing head body, a technical casing hanger and a tubing hanger, Both sides of the casing head body are symmetrically provided with a balance mechanism, which is located between the slips and the technical casing hanger and between the technical casing hanger and the tubing hanger; the balance mechanism includes a balance pipeline And a flange head, a pressure insurance observer, a pressure protection valve, a pressure gauge, a filling valve and a filling pressure gauge arranged on the balance pipeline, and a lateral pressure relief mechanism is arranged between the filling valve and the pressure protection valve. The invention is novel in design, simple and reasonable in structure, not only can effectively protect the pressure gauge on the balance pipeline, but also can relieve pressure when the pressure in the annular space is high and make pressure when the pressure in the annular space is too low, and is helpful for supplementary extrusion Construction operations such as mud, monitoring and filling of balance fluid.

Description

technical field [0001] The invention relates to the field of oil and gas casing heads, in particular to an integrated device for casing heads and oil and gas wellheads. Background technique [0002] Casing head, which is used to fix the wellhead of the drilled well, connect the wellhead casing string, support the gravity of technical casing and oil layer casing, seal the annular space between each layer of pipes, and install blowout preventers and tubing heads. , the Christmas tree provides a transition connection, and through the two side ports on the casing head body, construction operations such as re-squeeze mud, monitoring and filling of balance fluid can be carried out. The casing head is generally made of 35 or 42 chrome-molybdenum high-quality alloy structural steel. A casing hanger is also provided in the casing head to hang casing strings of corresponding specifications and seal the annular gap. A blowout preventer group should be installed on it. After the well...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/04E21B34/02E21B47/06
CPCE21B33/04E21B33/0422E21B34/02E21B47/06
Inventor 郭大进郭乃宏郭湧郭峰郭敏卞银华张鑫向柏润
Owner 淮安市井神钻采机具有限公司
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