While-drilling remote control type multi-stage bent-angle-adjustable screw drilling tool

Abstract

The invention provides a while-drilling remote control type multi-stage bent-angle-adjustable screw drilling tool, which comprises a casing, a stator, a rotor, a shaft coupler, a bearing and an output shaft, wherein a steering knuckle is connected between the shaft coupler and the output shaft; a bypass hole is processed in the output shaft; an adjusting device is arranged in an annular space formed between the casing and the output shaft, and is glidingly matched with a positioning pin; a spring is arranged outside the output shaft arranged at the lower part of the adjusting device; and an eccentric matching structure is formed among the adjusting device, the output shaft and the casing. The screw drilling tool has the advantages that the bent angle of the underground screw drilling tool is controlled through turning on / off of the pump on the ground; the multi-stage adjustment can be performed, so that the technical requirements of drilling processes of wells with different build angle rates and complicated structures can be met; meanwhile, the number of drilling tool replacing times of pipe tripping is reduced; the underground complicated condition occurring risk is reduced; and the drilling efficiency of wells with complicated structures is improved.

Description

technical field [0001] The invention relates to a power drilling tool in the fields of petroleum and natural gas drilling, coal bed gas drilling, geological exploration, mine drilling, etc., in particular to a screw drilling tool with multi-stage angle adjustable remote control while drilling. Background technique [0002] With the increasing difficulty of oil and gas field development and the rapid development of drilling technology, the number of wells with complex structures such as extended-reach wells, long horizontal wells, and multi-level branch wells is increasing day by day. Curved screw drilling tools are still widely used as directional drilling tools in China. One of the special tools is used, but the bending angle of conventional curved screw drilling tools is fixed. For complex structural wells with multiple build-up rates, it is not only necessary to equip multiple screw drilling tools with different bending angles, but also to frequently Drilling down to repl...

AI Technical Summary

Problems solved by technology

(1) Since the drill bit is connected to the output shaft of the screw drilling tool, there is a certain distance between the drill bit and the bending point of the screw drilling tool shell. Although the bending angle of the shell is adjustable, compared with the conventional fixed angle screw drilling tool, the The mechanical properties of the drill bit, but due to the existence of a certain distance, the change range of the mechanical properties of the drill bit is limited, that is, it cannot meet the technological requirements of high build-up rate; (2) The internal structure is relatively complex, there are many parts, and the processing technology requirements are higher

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