Downhole tool for achieving efficient rock breaking through spin vibration

A technology for downhole tools and rock breaking, applied in drilling, natural gas exploitation, and petroleum fields, can solve problems such as difficulty in meeting site requirements, matching of power drilling tools, and complex tool structure, so as to improve rock breaking efficiency, increase oscillating force, and output torque. smooth effect

Inactive Publication Date: 2016-01-13
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, corresponding tools have been designed at home and abroad, including hydraulic pressurizers, rotary steering tools, drag reduction tools, oscillators, etc. However, these tools have complex structures, single functions, short working life, and are difficult to meet site requirements: some are too large It cannot be matched with power drilling tools, and some cannot be used with measuring instruments while drilling, etc.

Method used

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  • Downhole tool for achieving efficient rock breaking through spin vibration
  • Downhole tool for achieving efficient rock breaking through spin vibration
  • Downhole tool for achieving efficient rock breaking through spin vibration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 1 As shown, the downhole tool mentioned in the present invention realizes high-efficiency rock breaking by means of rotary percussion oscillation pressurization, including a mandrel (1), an upper joint (2), a spacer (3), an outer tube (4), and a disc spring group (5), middle joint (6), mandrel middle joint (7), Ster seal piston (8), mandrel lower joint (9), lower joint (10), adjustment ring (11), turbine rotor (12 ), turbine stator (13), lower disc valve (14), adjustment sleeve (15), sleeve I (16), shunt sleeve (17), thrust bearing (18), transmission shaft (19), power storage spring ( 20), sleeve II (21), toothed surface impact hammer (22), cyclone seal (23), upper plate valve (25), passive impact joint (26).

[0024] The sleeve I (16) is connected to the turbine stator (13) through a flat key; the lower end of the turbine stator (13) is installed with a disc valve group; the lower end of the shunt sleeve (17) is installed with a thrust bearing (18); the...

Embodiment 2

[0029] The downhole tool mentioned in the present invention utilizes rotary percussion oscillation pressurization to realize high-efficiency rock breaking, and its use process is as follows:

[0030] In the downhole tool of the present invention, which realizes high-efficiency rock breaking by means of rotary punching oscillation pressurization, the drilling fluid drives the rotary impeller to rotate at high speed, so that the upper disc valve (25) of the disc valve group rotates, the lower disc valve (14) is fixed, and the upper disc valve group The liquid inlet hole of the disc valve (25) and the reset hole of the lower disc valve (14) are periodically communicated and closed, and the flow area between the two will change, thus forming a periodic pulse pressure wave with a certain amplitude. When the pressure rises , the drilling fluid acts on the Step seal piston, and the disc spring group is compressed to push the mandrel to move to the left. When the pressure decreases, th...

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Abstract

The invention relates to a downhole tool for achieving efficient rock breaking through spin vibration, and belongs to the technical fields of petroleum and natural gas exploitation and drilling tools. According to the technical scheme, drilling fluid drives a turbine to rotate, a turbine rotor drives a transmission shaft to rotate to drive a disc valve set to periodically rotate, the open area changes, a periodic pressure pulse is generated to act on a vibration nipple to generate reciprocating vibration, the friction resistance between a drilling column and the well wall is effectively improved, and mechanical drilling speed is increased; the lower end of a tooth-shaped impact hammer head is provided with a tooth-shaped curved surface which is meshed with a tooth-shaped curved surface of a lower-end transmission connector, and the lower-end transmission connector is driven by a transmission shaft to generate rotating motion, so that the tooth-shaped impact hammer head is driven to rotate to generate axial reciprocating impact on the lower-end transmission connector under the joint action of the tooth-shaped impact hammer head and a force accumulating spring. According to the downhole tool, the structure is simple, the friction resistance is small, effective bit pressure and effective vibration are increased, the mechanical rotating speed is increased, and the cost is reduced.

Description

technical field [0001] The invention relates to a downhole tool for realizing high-efficiency rock breaking by means of rotary punching and oscillating pressurization, and belongs to the technical fields of petroleum and natural gas exploitation and well drilling. Background technique [0002] With the increasing exploration and development of oil and gas resources in the world, the drilling technology is developing towards the fields of directional well drilling such as horizontal wells, highly deviated wells, and extended-reach wells. Large resistance torque, difficult transmission of bit pressure, low drilling efficiency, etc. How to reduce friction, reduce dragging pressure in sliding drilling, increase effective drilling pressure, and improve drilling efficiency, Chinese researchers have done a lot of exploration and research. Practice has shown that proper periodic axial vibration and proper pressure on the drilling string can reduce the frictional resistance between ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/24E21B4/02E21B4/16
Inventor 田家林胡书辉杨琳杨应林周韬杜凡蔡旭东
Owner SOUTHWEST PETROLEUM UNIV
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