US 2022/0186560 A1Published application

Multi-Function Drilling Tool

AssigneesSouthwest Petroleum University, Sichuan Jutingzao Technology Co., Ltd.

InventorsJialin TIAN, Lei TANG, Zhichao HU, Tongxu GE, Lin YANG, Chunyu XING

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Abstract

A drilling tool is disclosed. The two ends of the drilling tool are respectively connected with an upper drilling tool and a drill bit. The drilling tool includes an axial striking part, a torsional striking part, and an auxiliary part. Under the combined action of a spring and a high-pressure drilling fluid, the hammer of the axial striking part generates an axial striking force to strike the upper housing; and the pendulum of the torsional striking part generates a torsional striking force to strike the lower housing. The reversing switch and the center tube are plugged together to simultaneously reverse torsion and axial striking forces, respectively. The high-pressure drilling fluid pushes the hammer and the pendulum to generate axial and torsional striking forces, respectively, to effectively increase the ROP and reduce the stick-slip phenomenon. The drilling tool is stable and reliable in a complex and changeable downhole environment.

Claims15

Dependent claims

A multi-function drilling tool, comprising:

an axial striking part that includes an upper housing, a hammer configured to generate a strike, a center tube and an intermediate tube that move and reverse a direction of the hammer, a fixing block in the intermediate tube, an adjustment screw on the upper housing, and a spring between the fixing block and the hammer, wherein the hammer striking part reciprocally strikes the upper housing up and down to generate an axial striking force;
a torsional striking part that includes a pendulum in a lower housing, a reversing switch configured to turn the pendulum, an upper end cover and a lower end cover on upper and lower ends of the pendulum, respectively, wherein the pendulum striking part torsionally and reciprocally strikes the lower housing to produce a torsional striking force;
and
an auxiliary part that includes an upper connector configured to be connected with an upper drilling tool, a lower connector configured to be connected with a drill bit, and a nozzle in fluid communication with a variable-pressure cavity.

1 more element

Dependencies are inferred from the claim text.