Underground gas storage shaft cement sheath sealing performance evaluation device
A technology for evaluating device and cement sheath, which can be used in wellbore/well components, earth-moving drilling, construction, etc., and can solve problems such as difficult evaluation of cement sheath
Pending Publication Date: 2022-02-18
PETROCHINA CO LTD
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Problems solved by technology
[0005] The main purpose of the present invention is to provide an evaluation device for cement sheath sealing performance of underground gas storage wellbore to solve the problem of difficult evaluation of cement sheath in underground gas storage wellbore in the prior art
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[0029] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0030] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs.
[0031] In the present invention, unless stated otherwise, the used orientation words such as "upper, lower, top, bottom" are usually for the directions shown in the drawings, or for the parts themselves in the vertical, In terms of vertical or gravitational direction; similarly, for the convenience of understanding and description, "inner and outer" refer to the inner and outer relative to the outline of each component itself, but the above orientation words ...
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The invention provides an underground gas storage shaft cement sheath sealing performance evaluation device. The underground gas storage shaft cement sheath sealing performance evaluation device comprises a cylinder body, wherein a first through hole is formed in the bottom of the cylinder body; a rubber cylinder structure which is arranged in the cylinder body, and the rubber cylinder structure is provided with a second through hole which is coaxial with the first through hole; the casing string is arranged in the rubber cylinder structure, the casing string and the inner cylinder wall of the rubber cylinder structure are arranged in a spaced mode to form a containing ring body, the containing ring body is used for containing cement paste, the cement paste is solidified into a cement ring in the containing ring body, and the bottom end of the casing string sequentially penetrates through the first through hole and the second through hole to stretch out, and the casing string is attached to the hole wall of the second through hole; and an environment simulation device which is connected with the cylinder body, the rubber cylinder structure and the casing string. The problem that in the prior art, a cement sheath of an underground gas storage shaft is difficult to evaluate is solved.
Description
technical field [0001] The invention relates to the technical field of oil and gas well equipment, in particular to an evaluation device for the cement sheath sealing performance of an underground gas storage wellbore. Background technique [0002] In the production and operation of injection-production wells of underground gas storage, the integrity of the wellbore is prominent, mainly manifested as continuous pressure in the annulus at the wellhead. One of the reasons for the continuous pressure in the wellhead annulus is the sealing failure of the wellbore cement sheath, which leads to fluid leakage and seriously threatens the safety of personnel, the environment and equipment. [0003] Underground gas storage is used for cyclic injection and extraction of natural gas. With the alternating changes of wellbore temperature, gas internal pressure, operating pressure and in-situ stress field, after multi-stage injection and production, the sealing of the cement sheath may fai...
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Login to View More IPC IPC(8): E21B47/005E21B49/00
CPCE21B49/00
Inventor 党文辉钟守明石建刚张楠王雪刚宋琳李渊
Owner PETROCHINA CO LTD