Self-balancing drilling tool cable pipe wellhead conveying mechanism

Abstract

The invention relates to a self-balancing drilling tool cable pipe wellhead conveying mechanism which comprises a first cable pipe clamping mechanism. The first cable pipe clamping mechanism comprisesa first clamping assembly and a second clamping assembly, the first clamping assembly and the second clamping assembly are the same in structure, and the first clamping assembly and the second clamping assembly are oppositely arranged; a cable pipe is clamped between the first clamping assembly and the second clamping assembly, the first clamping assembly comprises a clamping supporting column, aclamping force transmission shaft cover, a second supporting roller and the like, a clamping motor stator is fixedly connected with the clamping supporting column, and the tail end of a clamping force transmission shaft is limited in a clamping force transmission shaft support through a first thrust bearing; and the head end of the clamping force transmission shaft penetrates through a clamping motor rotor to be fixedly connected with a conveying assembly in the clamping supporting column, and the cable pipe is clamped or loosened through a conveying clamp of the conveying assembly. Accordingto the self-balancing drilling tool cable pipe wellhead conveying mechanism, the size of the clamping mechanism is reduced under the condition that it is guaranteed that the contact area of the conveying clamp and the cable pipe is not changed, and therefore the height of the clamping mechanism is reduced; and security risks are reduced.

Description

technical field [0001] The invention belongs to the field of drilling and drilling engineering, and relates to a wellhead conveying mechanism for extracting, lowering or keeping a cable pipe stationary, in particular to a wellhead conveying mechanism for a self-balancing drilling tool cable pipe. Background technique [0002] For self-balancing drilling without drill pipe, when the drilling tool cable is transported, it is necessary to use a clamp to clamp the cable at the wellhead, so that the cable can be kept in a lowered, static or lifted state. Since there is no uphole equipment to apply drilling pressure into the well, the self-balancing drilling tool system with two drill bits in the well relies entirely on its own drill collar to apply pressure to the top drill bit, thereby breaking rock and soil. The double-bit self-balancing drilling tool system is heavy. Although the downhole mud will generate a certain buoyancy, the downward pulling force on the cable pipe is sti...

AI Technical Summary

Problems solved by technology

The double-bit self-balancing drilling tool system is heavy. Although the downhole mud will generate a certain buoyancy, the downward pulling force on the cable pipe is still very large.

Images