A multifunctional ground anchor device

Abstract

The invention relates to a multifunctional ground anchor device which comprises an upper nipple, a body, a center pipe, a throttle nozzle, a piston, an elastic part, a plurality of anchor fluke mounting holes, a plurality of anchor flukes and a plurality of connecting rods. The body is connected to the lower portion of the upper nipple, the center pipe is disposed inside the upper nipple and the body, the throttle nozzle is mounted on the inner side of the upper portion of the center pipe, the piston is mounted outside the upper portion of the center pipe, the elastic part is mounted on the outer side of the center pipe and on the lower portion of the piston, the anchor fluke mounting holes are formed on the wall of the body at equal interval circumferentially, the anchor flukes are contained inside the anchor fluke mounting holes and hinged to the body, and the connecting rods are hinged between the anchor flukes and the center pipe. Besides, an annulus is reserved between the outer wall of the center pipe and inner walls of the upper nipple and the body, and the outer wall of the piston is in slide fit with the inner wall of the upper nipple. The multifunctional ground anchor device is simple in structure and convenient to use, wide in application range and reliable in anchoring since multiple ground anchor devices can be combined into a multi-stage modular ground anchor to improve anchoring force according to different stratum conditions and aperture of the throttle nozzle and length of the anchor flukes can be selected flexibly according to construction conditions.

Description

technical field [0001] The invention relates to a downhole tool for well cementing operations, in particular to a multifunctional ground anchor device for prestressed well cementing in thermal recovery wells. Background technique [0002] At present, with the increasingly complex geological conditions and construction conditions of heavy oil thermal recovery development, it is difficult to combine the existing ground anchors according to the formation conditions to achieve the purpose of increasing the anchoring force, and it is difficult to adjust the opening displacement and length of the anchor fluke , the scope of application is limited. Contents of the invention [0003] In view of the above problems, the purpose of the present invention is to provide a multi-functional ground anchor device to effectively solve the problem of insufficient anchoring force in the process of well cementing in complex formations, adapt to the narrow range of process parameters, and poor a...

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Problems solved by technology

[0003] In view of the above problems, the purpose of the present invention is to provide a multi-functional ground anchor device to effectively solve the problem of insufficient anchoring force in the process of well cementing in complex formations, adapt to the narrow range of process parameters, and poor anchoring in the case of irregular boreholes. , so as to improve the efficiency of cementing construction

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