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Sleeve hanger longitudinal compensation annular pressure management short section and using method thereof

An annulus pressure and longitudinal compensation technology, which is applied in the direction of casing, drill pipe, earthwork drilling, etc., can solve problems such as complex methods and improper installation of casing hangers, and achieve easy compensation distance, wellbore integrity protection, and compensation range big effect

Pending Publication Date: 2022-05-10
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention overcomes the deficiencies in the prior art. The existing wellhead lifting method, that is, the casing hanger lifting method is complex, and needs to control the output, control the cycle temperature and reduce the concentration of thermal stress, and provides a casing hanger for longitudinally compensating the annular pressure Management of sub-joints and their use methods. The sub-joints have a large compensation range and easy serialization of compensation distances. According to the needs of operations, customized compensation ranges of 0.5m, 1.0m, 2.0m, and 3.0m can be customized for casing hanging longitudinal compensation annulus The pressure management sub-section solves the problem that the casing hanger is not properly installed under complex conditions. The sub-section is equipped with a pressure rupture disc. When abnormal high pressure occurs inside the casing, the pressure rupture disc ruptures to buffer the pressure and protect the integrity of the wellbore the role of

Method used

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  • Sleeve hanger longitudinal compensation annular pressure management short section and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] A casing hanger longitudinally compensating annular space pressure management nipple, comprising a casing hanger extension barrel 1, a sliding sealing barrel 2, a connecting sealing ring 3, a shear pin 4 and a casing extension barrel 5,

[0071] The lower outer wall of the casing hanging extension tube 1 is threadedly connected with the upper inner wall of the sliding sealing tube 2, and a connecting sealing ring 3 is arranged in the middle of the sliding sealing tube 2, and the casing extension tube 5 extends into the lower part of the sliding sealing tube 2, and slides The lower part of the sealing cylinder 2 is socketed on the outer side of the upper part of the sleeve extension cylinder 5, the outer wall of the head end of the sleeve extension cylinder 5 forms a diameter expansion section of the sleeve extension cylinder, and a sleeve extension is formed under the diameter expansion section of the sleeve extension cylinder. The reduced diameter section of the sleeve ...

Embodiment 2

[0073] On the basis of Embodiment 1, a pressure rupture disk 301 is provided on the inner wall of the sliding sealing cylinder 2, and the pressure rupturing disk 301 is located at the inner wall of the sliding sealing cylinder 2 below the expanding diameter section of the casing extension cylinder and above the connecting sealing ring 3 , when abnormally high pressure occurs inside the casing (at this time, the pressure has exceeded the rupture pressure of the rupture disk), the pressure rupture disk 301 ruptures, and the pressure can pass through the pressure transmission hole 502 between the sliding sealing cylinder 2 and the casing extension cylinder 5, and the series In the buffer sealing area formed by the sliding sealing cylinder 2, the connecting sealing ring 3, and the shrinking section of the casing extension cylinder, it plays the role of buffering pressure and protecting the integrity of the wellbore.

Embodiment 3

[0075] On the basis of the second embodiment, a sealing groove of the sliding sealing cylinder is opened on the inner wall of the sliding sealing cylinder 2, and a sealing ring of the sliding sealing cylinder is arranged in the sealing groove of the sliding sealing cylinder.

[0076] A connecting sealing ring sealing groove is opened on the inner wall of the connecting sealing ring 3, and a connecting sealing ring sealing ring is arranged in the connecting sealing ring sealing groove.

[0077] A sealing groove of the casing extension casing is provided on the diameter-expanding section of the casing extension casing, and a sealing ring of the casing extension casing is arranged in the sealing groove of the casing extension casing.

[0078] The casing hanger extension tube 1 is screwed to the tail end of the casing hanger E3.

[0079] The casing hanger longitudinal compensation annulus pressure management nipple can be threaded under the casing hanger E3 of different manufactur...

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Abstract

The invention provides a casing hanger longitudinal compensation annulus pressure management nipple and a using method thereof.The outer wall of the lower portion of a casing hanger extending cylinder is in threaded connection with the inner wall of the upper portion of a sliding sealing cylinder, a connecting sealing ring is arranged in the middle of the sliding sealing cylinder, and the casing hanger extending cylinder extends into the lower portion of the sliding sealing cylinder; the lower portion of the sliding sealing cylinder is connected to the outer side of the upper portion of the casing pipe extending cylinder in a sleeving mode, a casing pipe extending cylinder diameter-expanding section is formed on the outer wall of the head end of the casing pipe extending cylinder, a casing pipe extending cylinder diameter-reducing section is formed below the casing pipe extending cylinder diameter-expanding section, and the casing pipe extending cylinder diameter-reducing section extends to the tail end of the casing pipe extending cylinder. The sliding sealing cylinder and the sleeve extending cylinder are connected through the shear pin, and a buffering sealing area is formed by the reducing section of the sleeve extending cylinder, the connecting sealing ring and the lower portion of the inner wall of the sliding sealing cylinder. The short section is large in compensation range, the compensation distance can be easily serialized, and the compensation short section with the compensation range of 0.5 m, 1.0 m, 2.0 m and 3.0 m can be customized according to operation requirements.

Description

technical field [0001] The invention relates to the technical field, and more specifically relates to a casing hanger longitudinally compensating annulus pressure management pup joint and a method for using the same. Background technique [0002] During the production process, the heat flow of oil and gas in the formation enters the wellbore, causing the casing to expand and elongate under thermal stress conditions. For the surface wellhead, it will cause the overall vertical displacement and uplift of the wellhead device and the Christmas tree. Well control risk: For underwater wellheads, the casing will hang up and run away, and in severe cases, the annular space seal will fail, resulting in well control risks. [0003] At present, the commonly used methods to reduce wellhead uplift (casing hanger uplift) are to increase the amount of cementing cement, reduce the length of casing in the free section, control production, control cycle temperature, and reduce thermal stress ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B19/10E21B17/08
CPCE21B19/10E21B17/08
Inventor 李健赵苏文冯帆赵维青关清涛卢先刚刘红安李新妍
Owner CHINA NAT OFFSHORE OIL CORP