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High-speed rock-breaking drill tool

A drilling tool and rock-breaking technology, which is applied in the field of high-speed rock-breaking drilling tools, can solve the problems of more serious drilling tool damage, difficulty in pressurizing horizontal wells, and poor rock-breaking effect, so as to avoid well deviation and drill string wear and fatigue damage, improve wellbore quality and bit utilization, and reduce the number of trips

Inactive Publication Date: 2014-05-21
SOUTHWEST PETROLEUM UNIV
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  • Claims
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Problems solved by technology

[0002] With the rapid development of my country's drilling engineering, ordinary screw has made great progress. At present, the domestic screw has basically met the needs of my country's drilling engineering. Wells and horizontal wells account for an increasing proportion in oil drilling. For hard formations and hard formations encountered in deep wells, conventional simple rotary drilling methods have poor rock breaking effect, low drilling efficiency, and well deviation problems in deep wells. It is also increasingly prominent; in horizontal wells and extended reach drilling, as the horizontal displacement increases, it is more difficult to pressurize the horizontal well and the damage of the drilling tool is more serious

Method used

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Embodiment Construction

[0009] As shown in the drawings, the present invention is composed of bypass valve assembly 1-4, motor assembly 5-6, cardan shaft assembly 7-8, transmission shaft assembly 9-12, hydraulic jet impactor Assemblies 13-20 are formed, and at this time, during the drilling process, the mud output by the mud pump flows through the bypass valve assembly 1-4 and enters the motor assembly 5-6 under a certain drilling pressure. A certain pressure difference is formed at the inlet and outlet of Cheng 5-6 to drive the motor rotor 6 to rotate, and the torque and speed pass through the cardan shaft 8 and the transmission shaft 12, and when the transmission shaft 12 drives the drill bit to rotate, it is also received from the impactor High-frequency impact stress, and the rock is broken under the combined action of rotation and impact, so as to achieve the effect of high-speed rotary rock breaking.

[0010] The bypass valve assembly is mainly composed of a valve body 1, a valve core 2, a valv...

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Abstract

The invention relates to a high-speed rock-breaking drill tool used in the technical fields of oil and gas well drilling, tunneling, geological drilling and non-excavation. The high-speed rock-breaking drill tool increases the well drilling speed, so that the bit wear is slowed down, the bit life is prolonged, and the quality of a well bore is improved. The technical scheme is as follows: a valve element is located in a valve body, a spring is fixed on the valve element, a valve sleeve is fixed on the valve body through a snap ring, the valve body is connected with stators, the ratio of motor rotors to the stators is 3:4, an inclined hole is formed in the side surface of the motor rotor, the motor rotor is in threaded connection with a universal shaft, a bearing is installed on a transmission shaft, the transmission shaft is connected with an outer cylinder through the snap ring, a TC bearing ring is in interference fit with an enclosure, a fluidic element is connected with the transmission shaft, the transmission shaft adopts two channels, a punch hammer is connected with a piston, a hammering block is installed in an all-direction sleeve, the punch hammer is axially located with the all-direction sleeve according to the axis of the piston, and the all-direction sleeve is connected with the outer cylinder. The drill tool can rotatably break through a rock at a high speed, the quality of the well bore is improved, the bit life is prolonged, the drilling times are reduced, and the cost is greatly lowered.

Description

technical field [0001] The invention relates to a high-speed rock-breaking drilling tool used in oil and gas drilling engineering, tunnel engineering, geological drilling, and non-excavation technical fields, especially in oil and gas field drilling. Background technique [0002] With the rapid development of my country's drilling engineering, ordinary screw has made great progress. At present, the domestic screw has basically met the needs of my country's drilling engineering. Wells and horizontal wells account for an increasing proportion in oil drilling. For hard formations and hard formations encountered in deep wells, conventional simple rotary drilling methods have poor rock breaking effect, low drilling efficiency, and well deviation problems in deep wells. It is also becoming more and more prominent; in horizontal wells and extended-reach drilling, as the horizontal displacement increases, it is more difficult to pressurize the horizontal well, and the damage of the dr...

Claims

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Application Information

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IPC IPC(8): E21B6/00E21B7/00
Inventor 田家林付传红杨琳庞小林朱永豪李友
Owner SOUTHWEST PETROLEUM UNIV
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