Split-type double-balanced system small-diameter mechanical pushing device

Abstract

The invention provides a split-type double-balanced system small-diameter mechanical pushing device which comprises a probe part composed of a main base body and a pushing arm, a driving part, and a linear driving structure. A pressure bearing cavity is formed in one end inside the main base body, and a connecting cavity is formed in the other end inside the main base body. The pressure bearing cavity and the connecting cavity communicate through an inner balance pipe. A sealing device enabling a pressure bearing connector to be sealed at the end of the inner balance pipe so as to prevent hydraulic oil inside the pressure bearing cavity and hydraulic oil inside the connecting cavity from communicating is arranged in the pressure bearing cavity, and hydraulic oil communicating is achieved between the pressure bearing cavity and the pushing arm. The driving part comprises a tube body and a motor mounted in the tube body. The tube body is movably connected with one end of an electric connector of the probe part through a movable connector and achieves hydraulic oil communicating. According to the split-type double-balanced system small-diameter mechanical pushing device, through the sealing device, the whole pushing device is divided into two hydraulic systems which can independently operate, when one of the two hydraulic systems is in trouble, operation of the other hydraulic system is not influenced, and thus the working efficiency of the pushing device is greatly improved.

Description

technical field [0001] The invention relates to the field of geological exploration, in particular to a split-type double-balance system small-diameter mechanical pusher which is used to lean against the well wall during downhole measurement. Background technique [0002] With the development of the oil industry, the exploration technology of oil exploration is constantly updated. The thruster has always been an important part of the exploration equipment in the field of oil exploration, and is used to measure various data of the current drilling, such as inclination. However, the overall structure of the pusher currently used in the market is complicated, and most of them adopt an integrated structure, which makes disassembly and assembly difficult and maintenance costs are high; [0003] In addition, the existing thrusters are all for conventional wellbore, and for some special small diameter wellbore such as 120mm diameter, there is no mature and stable small diameter thr...

AI Technical Summary

Problems solved by technology

However, the overall structure of the pusher currently used in the market is complicated, and most of them adopt an integrated structure, which makes disassembly and assembly difficult and maintenance costs are high;

[0003] In addition, the existing pushers are all aimed at conventional wellbore. For some special small diameter holes such as 120mm diameter, there is no mature and stable small diameter pusher.

Images