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Balling-resistant PDC (polycrystalline diamond compact) drill bit with communicated pits in surfaces of flow channels

A pit and drill bit technology, which is applied in the direction of drill bits, drilling equipment, earthwork drilling and mining, etc., to achieve the effects of reducing viscosity and drag, preventing accumulation and preventing adhesion

Active Publication Date: 2014-02-26
四川川石金刚石钻头有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, to provide an anti-balling PDC drill bit with a through pit on the surface of the flow channel, which solves the problem of anti-balling of the PDC bit, thereby improving drilling efficiency and reducing drilling costs

Method used

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  • Balling-resistant PDC (polycrystalline diamond compact) drill bit with communicated pits in surfaces of flow channels
  • Balling-resistant PDC (polycrystalline diamond compact) drill bit with communicated pits in surfaces of flow channels

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with specific embodiments and drawings.

[0026] See figure 1 with figure 2 An anti-mud pack PDC drill bit with penetrating pits on the flow channel surface, comprising a drill bit body 2, the lower part of the drill bit body 2 is provided with a threaded joint 3 for connecting the drill rod, and the upper part is provided with several blades 4, between the blades 4 The grooves formed by forming the runner groove 5 of the drill bit, and the entire surface of the runner groove 5 is provided with pits 1 that penetrate each other.

[0027] The PDC bit can also be provided with interpenetrating pits 1 on only part of the surface of the runner groove 5, that is, only on the surface of the runner groove 5 on the front side of the blade, or only on the runner groove 5. The bottom surface of the blade is provided with mutually penetrating pits 1 or only on the surface of the runner groove 5 on the rear side of th...

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Abstract

The invention discloses a balling-resistant PDC (polycrystalline diamond compact) drill bit with communicated pits in the surfaces of flow channels. The balling-resistant PDC drill bit comprises a drill bit body. A threaded connector connected with a drill pipe is arranged on the lower portion of the drill bit body, a plurality of blades are arranged on the upper portion of the drill bit body, grooves formed in positions among the blades form flow channel grooves of the drill bit, and the pits which are communicated with one another are arranged on parts or all of the surfaces of the flow channel grooves. Compared with a conventional PDC drill bit, the balling-resistant PDC drill bit with the communicated pits in the surfaces of the flow channels has the advantages that the quantity of rock debris adhered on the flow channel grooves can be obviously reduced, blockage of the flow channels can be prevented, the purpose of balling resistance can be achieved, accordingly, the drilling efficiency of the drill bit can be improved, and the well drilling cost can be reduced.

Description

Technical field [0001] The invention belongs to the technical field of drilling equipment such as petroleum and natural gas, mining engineering, building foundation engineering construction, geology, hydrology, etc., and particularly relates to a mud-resistant package PDC drill bit with a through pit on the surface of a flow channel. Background technique [0002] PDC drill bit is a kind of drill bit that uses polycrystalline diamond composite chip (PDC tooth, also referred to as cutting tooth or tooth) to scrape or shear the rock. It is one of the main rock breaking tools used in drilling engineering today. , Especially in the drilling of soft formations, PDC bits are used most. In order to make the cutting structure and hydraulic structure of the drill bit achieve better working results, when designing and manufacturing the drill bit, the PDC teeth are usually divided into several groups according to a certain rule, and the PDC teeth of the same group are consolidated on the sam...

Claims

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Application Information

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IPC IPC(8): E21B10/60
Inventor 杨迎新秦晓庆王希勇林敏陈炼任海涛周春晓包泽军
Owner 四川川石金刚石钻头有限公司
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