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Composite core drill bit

A compound drill bit and core cutting technology, which is applied in the direction of drill bit, drilling equipment, earthwork drilling and production, etc., can solve the problems of low work efficiency, large wear of the drill bit, short life of the drill bit, etc., and achieve the effect of improving work efficiency

Active Publication Date: 2016-08-03
徐州馨予康建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Drill bits, when drilling hard rock formations, deep sea operations, and deep wells, the life of a single drill bit is short and the work efficiency is low. After reaching a certain depth, a new drill bit needs to be replaced. Secondary reaming treatment, which not only causes relatively large wear of the drill bit, but also requires the drilling equipment to be pulled out from the rock formation and replaced when replacing the drill bit, thus affecting the drilling efficiency

Method used

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  • Composite core drill bit
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Experimental program
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Effect test

Embodiment Construction

[0021] The core-cutting composite drill bit includes: a drill part, a core-cutting part, and a broken core part.

[0022] The drill head is in the shape of an annular tube, and is provided with a plurality of rotatable drill teeth. The drill teeth are made of superhard material and provided with a water outlet.

[0023] The teeth are arranged to secure the head end of the barrel drill.

[0024] The core-cutting part is composed of 1-20 saw blades arranged side by side, and is driven to rotate vertically by a bearing.

[0025] The broken core part is composed of upper and lower two large grinding discs. The upper grinding disc is distributed with 1-30 holes. The upper part of the hole is larger than the lower one. Grinding, the crushed powder or small particles are transferred out of the wellhead by the screw rod.

[0026] The drill part is surrounded by the drill part at the outer core cutting part and is indented by 3-30 cm.

[0027] The broken core part is on the top of t...

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PUM

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Abstract

The invention belongs to the technical field of drill bits and particularly relates to a core cutting and breaking combined drill bit. The combined drill bit can be used for drilling, and cutting and breaking cores. The principle of a coring bit is adopted, the hard geological stratum is drilled first so as to be loosened and then cut up through thick sawteeth, fragments which are cut off through drilling are ground into small particles and powder through an upper large abrasive disk and a lower large abrasive disk of a core breaking part, and finally the small particles and powder are backed out of a well mouth through unscrewing of a screw rod. The core cutting and breaking combined drill bit can have a good effect particularly in large hole and deep hole operation, the service life of the drill bit can be prolonged, and the working efficiency of the drill bit can be improved.

Description

technical field [0001] The invention belongs to the technical field of drill bits, in particular to a composite drill bit for core cutting and chipping. Background technique [0002] Drill bits are used to drill through holes or blind holes in solid materials. There are many types of drill bits with different functions and different working objects. Commonly used drill bits mainly include twist drills, flat drills, center drills, deep hole drills, nesting drills, and hollow drills. [0003] Drill bits, when drilling hard rock formations, deep sea operations, and deep wells, the life of a single drill bit is short and the work efficiency is low. After reaching a certain depth, a new drill bit needs to be replaced. The secondary reaming process not only causes the drill bit to be worn out, but also needs to be replaced after the drilling equipment is extracted from the rock formation when replacing the drill bit, thereby affecting the working efficiency of drilling. Content...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/00
Inventor 郑国荣周海涛
Owner 徐州馨予康建材有限公司
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