Split-flap bridge plug hydraulic setting tool and setting method
A split-flap bridge plug and hydraulic setting technology, which is applied in sealing/package, earthwork drilling, wellbore/well components, etc. It can solve problems such as difficult drilling, high cost, and inability to drill plugs
Active Publication Date: 2021-08-13
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0003] However, the staged fracturing drilling and removal operation of the bridge plug is facing great difficulties, such as difficult drilling, difficult return of cuttings, damage to the casing, and operation under pressure, etc., resulting in high risk, long period and high cost of the overall operation well control
In addition, for deep shale gas wells with a depth of 4500m and above and a horizontal section length of 2000m or above, coiled tubing construction is difficult and plug drilling is even impossible
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[0039] In order to make the technical solutions and advantages of the present invention clearer, the exemplary embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only a part of the embodiments of the present invention, and are not exhaustive of all the embodiments. And in the case of no conflict, the embodiments and the features in the embodiments of the present invention can be combined with each other.
[0040] The inventor noticed during the invention process that during the drilling-off process after the staged fracturing operation of the bridge plug in the development of tight oil and gas reservoirs, the drilling-off operation is faced with great difficulties, such as difficult drilling and difficult return of drill cuttings , Casing damage, snubbing operations, etc., the overall operation well control risk is high, the cycle is long, and the cost is high. ...
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The present invention provides a hydraulic setting tool for split-flap bridge plug and its setting method, the tool includes: a joint; a connecting sleeve, one end of which is fixedly connected to the joint; a central rod, one end of which is connected to the other end of the connecting sleeve One end is connected, and the central rod is provided with a central hole and a bypass hole; one end of the liquid cylinder is movably socketed outside the connecting sleeve, and one end of the liquid cylinder is fixedly connected with a piston, and the piston is located in the center Between the rod and the hydraulic cylinder; the setting sleeve, one end of which is connected to the piston, and the setting sleeve is provided with a circulation hole communicating with the annulus, the circulation hole and the bypass hole of the central rod before setting communication; a split-petal bridge plug supporting sleeve, which is connected to the other end of the setting sleeve; and a split-petal bridge plug supporting skeleton externally connected to the split-petal bridge plug, which is fixedly connected to the other end of the central rod. The tool has a simple structure, is safe and reliable, and can effectively ensure the construction efficiency of the split-flap bridge plug.
Description
technical field [0001] The invention relates to the technical field of oilfield downhole tools, in particular to a hydraulic setting tool for a split-flap bridge plug and a setting method thereof. Background technique [0002] In the development of tight oil and gas reservoirs, the existing technology adopts staged fracturing of bridge plugs, but the bridge plugs need to be drilled after staged fracturing operations to realize the full diameter inside the wellbore and ensure later production and secondary fracturing. remodel. [0003] However, the bridge plug staged fracturing drilling and removal operation is facing great difficulties, such as difficult drilling, difficult return of drill cuttings, casing damage, snubbing operation, etc., resulting in high risk of overall well control, long cycle time and high cost. In addition, for deep shale gas wells with a depth of 4,500 m and above and a horizontal section length of 2,000 m or above, coiled tubing construction is diff...
Claims
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IPC IPC(8): E21B23/04E21B33/134E21B43/26
Inventor 薛占峰马兰荣魏辽朱玉杰吴晋霞韩峰
Owner CHINA PETROLEUM & CHEM CORP