Hydraulic supporting device for casing well

Abstract

The invention belongs to the technical field of well logging, drilling and completion of oil and gas industry, and particularly relates to a hydraulic supporting device for a casing well. The hydraulic supporting device is characterized in that a ground control system, a cable, a liquid control unit and a supporting unit are included; the liquid control unit comprises a balancing outer cylinder, abalancing piston, a lead pipe, a pressure-bearing disc, a motor, a hydraulic pump, an electromagnetic reversing valve I and an electromagnetic reversing valve II; the electromagnetic reversing valveI is connected to the supporting unit, and the electromagnetic reversing valve II is connected to the supporting unit; and the supporting unit comprises a main body, a plurality of step-shaped hole channels, pistons, slips, springs, pressing caps, a flow channel II and a plurality of flow channels I, wherein the step-shaped hole channels are formed in the main body, the pistons, the slips, the springs and the pressing caps are arranged in the step-shaped hole channels correspondingly, and the flow channel II and the multiple flow channels I are connected with the multiple step-shaped hole channels correspondingly. The hydraulic pressure is adopted as power to push the slips to stretch out, the slips are engaged with the shaft casing wall to form locking force to fix an instrument so as tocarry out next construction work, and after construction is completed, a hydraulic inlet and outlet are switched to push the slips to retract to relieve anchoring.

Description

technical field [0001] The invention belongs to the technical field of well logging and drilling and completion in the petroleum and natural gas industry, and in particular relates to a hydraulic support device for a cased well. Background technique [0002] In the process of oil and gas exploration and development, cables are often used to lower instruments into wells for drilling, sampling and other operations. Before construction, the instruments are first fixed to the casing in the well. At present, downhole instruments generally use hydraulic support arms to realize this function. , the hydraulic support arm is affected by its structural characteristics, and the support force formed by the well wall is relatively small, which can meet the needs of conventional operations, but it is difficult to meet the requirements when faced with special working conditions such as drilling and unblocking. Contents of the invention [0003] The purpose of the present invention is to ...

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Problems solved by technology

[0002] In the process of oil and gas exploration and development, cables are often used to lower instruments into wells for drilling, sampling and other operations. Before construction, the instruments are first fixed to the casing in the well. At present, downhole instruments generally use hydraulic support arms to realize this function. , the hydraulic support arm is affected by its structural characteristics, and the support force formed by the well wall is relatively small, which can meet the needs of conventional operations, but it is difficult to meet the requirements when faced with special working conditions such as drilling and unblocking

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