Anti-rotation fracture bridge plug beneficial to drilling
A fracturing and anti-rotation technology, which is applied in earthwork drilling, wellbore/well components, sealing/packing, etc., can solve the problems of difficult drilling and milling, easy sticking, etc., to improve the ease of drilling and milling, and facilitate drilling The effect of milling and preventing up and down movement
Active Publication Date: 2016-05-04
四机赛瓦石油钻采设备有限公司
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Problems solved by technology
The currently used drillable metal bridge plugs generally have the disadvantages of easy drilling and difficulty in drilling and milling.
Method used
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[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0024] This embodiment provides an easy-to-drill anti-rotation fracturing plug, such as figure 1 As shown, it includes the center tube 2 and the slip stop ring 4 set on the outer wall of the center tube 2, the slip 7 embedded in the cone, the cone back ring 8, the end rubber sleeve 9, the middle rubber sleeve 12 (including the bearing retaining ring 10 and O-ring 11), guide shoe 13 (including guide shoe insertion rod 14) and the fracturing resin ball 1 in the central tube 2, the slips 7 have 8 pieces, and are uniform along the inner circumference of the casing distribution, the circumference of the cone back ring 8 is evenly provided with 8 dovetail grooves compatible with the aforementioned 8 slips 7, and the aforementioned 8 slips 7 are composed of 2 snap rings 6 arranged in parallel along the inner circumference of the casing. Tighten the assembly. ...
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Abstract
The invention relates to the field of petroleum industry oil and gas production devices, in particular to an anti-rotation fracture bridge plug beneficial to drilling. The bridge plug is used for borehole operation packing. The bridge plug comprises a central pipe, clip stop rings, clips, a cone, a back ring, an end rubber sleeve, a middle rubber sleeve, a guiding shoe and a fracture resin ball, wherein the middle rubber sleeve is provided with a bearing ring and an O-shaped seal ring, the guiding shoe is provided with a guiding shoe insertion rod, the fracture resin ball is arranged in the central pipe, the clip stop rings are arranged on the outer wall of the central pipe in a sleeving mode, the eight clips are embedded in the cone and evenly distributed in the sleeve circumferentially, the cone and the back ring are of an integral cone back ring structure, eight dovetail grooves matched with the eight clips are evenly formed in the cone back ring circumferentially, and the eight clips are fastened and assembled by the two clamping rings which are arranged in the sleeve circumferentially in parallel. A composite bridge plug is easy to drill and mill, and a drill is prevented from being stuck.
Description
technical field [0001] The invention relates to the field of oil and gas recovery equipment in the petroleum industry, in particular to an easy-to-drill anti-rotation fracturing bridge plug used for isolation in downhole operations. Background technique [0002] At present, with the development of oil and gas fields and the continuous depletion of non-renewable energy sources, unconventional oil and gas will become an important substitute for future oil and gas energy. my country is rich in shale gas resource reserves, but due to the characteristics of low porosity and ultra-low permeability of shale gas reservoirs, multi-level and multi-stage fracturing technology is required for reservoir reconstruction in order to effectively increase single well production. At present, the commonly used multi-stage fracturing technologies at home and abroad mainly include open-hole packer staged fracturing technology, static string hydraulic jet staged fracturing technology, coiled tubin...
Claims
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Login to View More IPC IPC(8): E21B33/134
CPCE21B33/134
Inventor 周歆邹刚赵俊峰汪建杨小城
Owner 四机赛瓦石油钻采设备有限公司