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Cementing sliding sleeve

A sliding sleeve and well cementing technology, which is applied in the direction of wellbore/well components, wellbore/well valve devices, production fluids, etc., can solve the problem of unconventional oil and gas reservoirs such as shale gas with high-efficiency development and intelligent sliding sleeve operation complex problems, to achieve the effects of simplified fracturing operations, fast timeliness, and efficient development

Active Publication Date: 2017-04-26
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, the intelligent sliding sleeve that can be applied to the shale gas staged fracturing construction process is complicated to operate, and it is difficult to realize the efficient development of unconventional oil and gas reservoirs such as shale gas

Method used

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0030] see figure 1 , the embodiment of the present invention provides a cementing sliding sleeve, the cementing sliding sleeve is a hollow tubular structure, including an upper joint 1, an electrical sub-section I, a hydraulic control sub-section II, and a reversing sub-section III, which are sequentially connected in the axial direction , Sliding sleeve pup joint IV and lower joint 22.

[0031] Among them, the sliding sleeve nipple IV includes: sliding sleeve outer cylinder 16, sliding sleeve inner cylinder 23, and an annular sliding sleeve cavity 45 is formed between the sliding sleeve outer cylinder 16 and the sliding sleeve inner cylinder 23;

[0032] The sliding sleeve cavity 45 is provided with a sliding sleeve 25; the side wal...

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Abstract

The invention discloses a cementing sliding sleeve and relates to the technical field of shale gas exploitation. The cementing sliding sleeve that is of hollow tube structure comprises an upper connector, an electrical sub, a hydraulic sub, a reversing sub, a sliding sleeve sub and a lower connector that are axially connected in sequence; a sliding sleeve outer barrel, a sliding sleeve inner barrel and a sliding sleeve are arranged in the sliding sleeve sub, the sidewall of the sliding sleeve is provided with a first fracturing hole, the sidewall of the sliding sleeve outer barrel is provided with a second fracturing hole, and the sidewall of the sliding sleeve inner barrel is provided with a third fracturing hole relative to the second fracturing hole. The electrical sub is controlled via radio, the hydraulic sub and the reserving sub are controlled to drive the sliding sleeve to move side to side in a sliding sleeve cavity, and fracturing may be started when the three fracturing holes are aligned. The cementing sliding sleeve provided herein is accurate to operate and acts fast, fracturing operation is simplified, the cementing sliding sleeve is repeatedly openable, and efficient exploitation is achieved for unconventional oil and gas reservoirs such as shale gas.

Description

technical field [0001] The invention relates to the field of shale gas exploitation, in particular to a cementing sliding sleeve. Background technique [0002] With the continuous deepening of exploration and development of oil and gas reservoirs, the implementation of staged fracturing of horizontal wells has become a necessary means for the effective development of unconventional gas reservoirs such as shale gas. At present, the staged fracturing technology for horizontal wells in shale gas wells is mainly a combination of fast drilling bridge plugs and cluster perforation: that is, the horizontal well section is divided into several sections, and the front casing is perforated first, and then the fracturing is performed. ; Then run the fast drilling bridge plug to block the previous section, and then carry out cluster perforation and fracturing construction on the adjacent section, so as to complete the staged fracturing of the entire horizontal well in turn. However, in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B34/14E21B43/26
CPCE21B34/14E21B43/26
Inventor 付玉坤马辉运杨云山段国彬尹强喻成刚李力喻冰何明格
Owner PETROCHINA CO LTD
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