A power nipple assembly of a double-layer drill string anti-deflection and straight drilling tool

Abstract

The invention relates to a double-layer drill string anti-deflection vertical drilling tool power sub assembly for drilling a vertical well (or vertical well sections) in drilling engineering. A structure of the double-layer drill string anti-deflection vertical drilling tool power sub assembly form top to bottom mainly includes an upper connector, a body, a center pipe, a first spring, a piston barrel, a piston, a first force transmission barrel, a second spring, a first oil plug, a second force transmission barrel, a first thrust bearing (including two thrust washers and a first bearing rolling body), a disc spring set, a second thrust bearing (including a thrust washer, a thrust cushion block, and a second bearing rolling body), a third force transmission barrel, a drill string connector, a third spring, and a second oil plug. According to the double-layer drill string anti-deflection vertical drilling tool power sub assembly, mainly through mutual screw together of the upper connector and the body, extrusion force is generated to the first force transmission barrel and relative parts on the lower part, and is passed down step by step to provide power compressing the internal drilling string and pulling the external drilling string for a double-layer drilling string assembly connected to the lower part of the power sub assembly, drilling pressure is not reduced, and the structure is relatively simple.

Description

technical field [0001] The invention belongs to the field of oil and natural gas drilling tools, in particular to a power nipple assembly of a double-layer drill string anti-deviation and straight drilling tool. Background technique [0002] With the continuous development of exploration and development of oil and natural gas resources, problems encountered in drilling such as formation structure (such as high steep geological structure), uneven formation hardness, drilling tool type and structure, and drilling tool assembly During the drilling process, the wellbore trajectory of the drilled vertical well (or diameter section) cannot achieve the expected purpose (completely vertical or the well deviation of the whole well is 0°). In this way, the "deflection prevention and straightening" technology can reduce drilling costs to a certain extent and avoid waste of resources. [0003] In order to reduce the drilling cost due to well deviation to a greater extent, the technolog...

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Problems solved by technology

[0005] The present invention aims to solve the problems of sacrificing drilling pressure and drilling speed, poor reliability, inability to withstand high temperature and complex structure in the existing vertical drilling tools, and provides a relatively simple structure for the oil and gas drilling field without sacrificing drilling pressure and drilling speed. , the power termination assembly of the anti-deviation and straight drilling tool with a relatively high reliability supporting the double-layer drill string assembly, mainly used in the anti-deviation and straightening technology in the field of oil and gas drilling

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