Claw rubber tube sealing type large diameter bridge plug
A large-diameter, rubber cartridge technology, applied in sealing/package, wellbore/well components, earthwork drilling and production, etc., can solve problems such as difficulty, high setting pressure, and potential safety hazards, and achieve low setting pressure , reasonable structure, and the effect of reducing risks and operating costs
Active Publication Date: 2018-12-18
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
[0003] The present invention provides a large-diameter bridge plug with a claw rubber tube sealing type, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problems of conventional large-diameter bridge plugs, such as high setting pressure, great difficulty, and potential safety hazards. question
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[0014] The present invention is not limited by the following examples, and specific implementation methods can be determined according to the technical solutions of the present invention and actual conditions.
[0015] In the present invention, for the convenience of description, the description of the relative positional relationship of each component is based on the description attached to the description. figure 1 The layout method is described, such as: the positional relationship of top, bottom, left, right, etc. is based on the attached figure 1 determined by the layout direction.
[0016] Below in conjunction with embodiment and accompanying drawing, the present invention will be further described:
[0017] as attached figure 1 , 2 As shown, the claw rubber cartridge packing type large-diameter bridge plug includes a central pipe 1, a packing assembly, a setting cone, a slip assembly, and a guide shoe 3; Spacer assembly, setting cone, slip assembly and guide shoes 3...
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The invention relates to the technical field of large-drift-diameter bridge plugs provided with claw pieces and rubber cylinders for packing, and provides a large-drift-diameter bridge plug provided with claw pieces and a rubber cylinder for packing. The large-drift-diameter bridge plug comprises a central pipe, a packing assembly, a setting cone, a slip assembly and a guide shoe. The packing assembly, the setting cone, the slip assembly and the guide shoe are sequentially mounted on the central pipe from top to bottom. The packing assembly comprises a rubber cylinder framework and the rubber cylinder, and the upper portion of the rubber cylinder framework is cylindrical and mounted outside the upper portion of the central pipe through a first shearing dowel. The large-drift-diameter bridge plug is reasonable and compact in structure and convenient to use; while the setting one moves downwards, the elastic claw pieces just need to overcome the friction resistance between the elastic claw pieces and a setting section of the rubber cylinder and counter-acting force applied by the conical cylinder surface to achieve setting, the setting pressure is lower, the setting difficulty is lowered, and the safety is improved; and the drift diameters of the rubber cylinder framework, the setting cone and the guide shoe are all large, so that drilling removal is not needed, the risk and operation cost are reduced, and the practicability is high.
Description
technical field [0001] The invention relates to the technical field of a claw rubber cylinder sealing type large-diameter bridge plug, and relates to a claw rubber cylinder sealing type large diameter bridge plug. Background technique [0002] The development of gas reservoirs in unconventional oilfields has been paid more and more attention to the exploration and development of oilfields. The porosity and permeability of unconventional reservoirs are very low. Generally, perforation and large-scale staged fracturing can achieve better recovery. For oil wells, multi-cluster perforation with different hole density and different hole distribution methods, and then staged fracturing, will greatly improve the effect of reservoir fracturing; in staged fracturing, it is necessary to use bridge plugs to seal the formation , the conventional composite bridge plug needs to be drilled out after fracturing due to its small internal diameter; the large diameter bridge plug can fully mee...
Claims
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IPC IPC(8): E21B33/134
CPCE21B33/134
Inventor 张胜鹏李晓军李红涛高攀张昕李富强
Owner BC P INC CHINA NAT PETROLEUM CORP