Full-bore sliding sleeve with soluble structures
A full-bore, sliding sleeve technology, applied in wellbore/well valve devices, production fluids, wellbore/well components, etc., can solve the problem that the casing sliding sleeve cannot be opened, etc. Beneficial for post-production work
Active Publication Date: 2016-06-15
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0004] In view of the above problems, the purpose of the present invention is to provide a full-bore sliding sleeve with a dissolvable structure, which can effectively avoid the technical defect that the casing sliding sleeve cannot be opened due to cementing cement slurry blocking the liquid inlet hole or filling the groove
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[0023] The present invention will be further described below in conjunction with accompanying drawing.
[0024] please see figure 2 , which is a structural schematic diagram of a full-bore sliding sleeve with a dissolvable structure according to the present invention. The full-diameter sliding sleeve mainly includes: an upper joint 1, a lower joint 2, an outer cylinder 3, an inner cylinder 4, a shear pin 5 and a dissolvable structure.
[0025] Wherein, the upper joint 1 and the lower joint 2 are respectively connected to two ends of the outer cylinder 3 . Preferably, the upper joint 1 can be threaded with the outer cylinder 3, and the lower joint 2 can also be threaded with the outer cylinder 3, so as to facilitate installation and disassembly. However, the connection mode between the upper joint 1 , the lower joint 2 and the outer cylinder 3 is not limited to the above-mentioned threaded connection, and other detachable or non-detachable connection modes are applicable to ...
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The invention provides a full-bore sliding sleeve with soluble structures. The full-bore sliding sleeve comprises an upper connector, a lower connector, an outer cylinder, an inner cylinder, a shear pin and the first soluble structure. The upper connector and the lower connector are connected to the two ends of the outer cylinder respectively. The inner cylinder is locked in the outer cylinder through the shear pin and seals a flow guide hole in the outer cylinder. A moving space is formed between the inner cylinder and the lower connector and filled with the first soluble structure. The moving space of the inner cylinder and a groove in the inner wall of the inner cylinder are pre-filled with the soluble structures, adverse effects caused when well cementation cement slurry blocks the moving space and the groove can be effectively avoided, full bore of a shaft can be kept after fracturing construction, the sliding sleeve is particularly beneficial to later work of an oil gas well, and the sliding sleeve can achieve the repeated opening and closing function.
Description
technical field [0001] The invention relates to the technical field of oil and gas exploitation, in particular to a sliding sleeve with soluble materials. Background technique [0002] In recent years, oil and gas fields at home and abroad have achieved certain results in the use of fine segmentation in horizontal wells. Fine segmentation requires a large increase in the number of sliding sleeves, and the previous ball-pitching sliding sleeves have insufficient segmentation in fine segmentation. limitations. In order to meet the requirements of fine segmentation, the research and development of full-bore sliding sleeves has been carried out in China in recent years. However, the current full-bore sliding sleeves (see figure 1 ) There is a problem that the cementing slurry blocks the liquid inlet or fills the groove, which is not conducive to the opening of the casing sliding sleeve, which leads to the failure of the sliding sleeve and causes relatively large economic losses...
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IPC IPC(8): E21B34/08E21B33/13E21B43/26
CPCE21B33/13E21B34/08E21B43/26
Inventor 甘振维赵伟侯治民胡顺渠谢志林永茂刘涛周怡君潘敏滕汶江陈晨
Owner CHINA PETROLEUM & CHEM CORP