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PDC bit rock breaking tool

A tool and rock-breaking technology, which is applied in the field of PDC drill bit rock-breaking tools, can solve the problems of reducing the service life of the drill bit, short action time of the drill bit, and low energy utilization rate, so as to improve the service life, rock-breaking efficiency, and energy utilization rate. high effect

Inactive Publication Date: 2019-06-25
刘伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of tool has complex structure, short service life and low energy utilization rate. The water hammer force generated by the disturbance assembly is a rigid impact, which has a short action time on the drill bit and a large impact force, which may easily lead to impact damage of the drill bit and greatly reduce the service life of the drill bit.

Method used

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  • PDC bit rock breaking tool

Examples

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Effect test

Embodiment Construction

[0024] The following non-limiting examples serve to illustrate the invention.

[0025] A PDC bit rock breaking tool, comprising a bit body 1, a blade 11, a PDC tooth 12, and a nozzle 13. The rock breaking tool is provided with a tool housing 3, a diverter 5, a jet element 4, and a piston from top to bottom. The cylinder 34, the piston 32, the hammer 31, the anvil 14, the drill body 1, the anvil 14 is arranged inside the drill body 1, the anvil 14 is provided with an elastic element 2, and the piston cylinder 34 is provided with an elastic element 2. Such as figure 1 Shown.

[0026] Preferably, the elastic element in the rock breaking tool is a leaf spring, a coil spring, a gas spring, or a rubber spring.

[0027] Preferably, the disturbance frequency of the rock breaking tool is controlled within the range of 5Hz-50Hz.

[0028] Preferably, the perturbation amplitude of the rock breaking tool to the drill bit is controlled by 3mm-10mm.

[0029] Preferably, the ratio of the axial force...

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PUM

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Abstract

The invention discloses a PDC bit rock breaking tool, comprising a bit body, a blade wing, PDC teeth and a nozzle, wherein the rock breaking tool is provided with a tool shell, a splitter, a jet element, a piston cylinder, a piston, a ram, an anvil and a bit body from top to bottom, the anvil is arranged inside the bit body, the anvil is provided with an elastic element, and an elastic element isarranged in the piston cylinder. The tool has the advantages of simple structure, easiness in operation and high energy utilization rate, periodically disturbs rock, reduces the mechanical propertiesof the rock, improves the rock breaking efficiency of the tool, reduces the 'chip hold effect' of downhole cuttings, and favorably improves the cleaning efficiency of the downhole cuttings.

Description

Technical field [0001] The invention relates to a PDC drill bit rock breaking tool used in the fields of petroleum and natural gas drilling engineering, mine exploitation, geological drilling and the like. Background technique [0002] With the depletion of shallow oil and gas resources, drilling engineering is gradually developing into areas with severe environmental conditions such as deep wells and ultra-deep wells. As the depth of the well increases, the difficulty of rock breaking will increase greatly, resulting in low rock breaking efficiency of the drill bit and high drilling speed decline. When the traditional rotary drilling method encounters hard formations, the drilling efficiency is reduced, the drilling cycle is longer, and the cost is higher. [0003] A large amount of elastic strain energy is accumulated in the rock in the deep formation, and the stress at the fracture end is concentrated, but it does not exceed the failure strength of the rock. In this way, the hi...

Claims

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Application Information

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IPC IPC(8): E21B10/36E21B10/46E21B21/00
Inventor 黄奎林刘伟
Owner 刘伟
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