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Polycrystalline diamond compact (PDC) bit

A drill bit and ring technology, applied in the field of PDC drill bits, can solve the problems of increasing the number of cutting blades, damage of diamond composite sheets, easy mud bag, etc., and achieve the effect of improving cutting stability and eliminating polygonal impact force

Active Publication Date: 2016-09-07
莱州市原野科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the number of cutting blades is increased too much, the following disadvantages and deficiencies still exist: ①The drill bit still impacts the formation with a polygonal profile, and every time it cuts the formation, an impact load will be generated, thereby damaging the diamond composite sheet; ②Increasing the cutting blade The number of wings reduces the volume of the flow channel, which is easy to mud bag

Method used

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  • Polycrystalline diamond compact (PDC) bit
  • Polycrystalline diamond compact (PDC) bit
  • Polycrystalline diamond compact (PDC) bit

Examples

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Embodiment Construction

[0035] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

[0036] According to one aspect of the present invention, a PDC drill bit is provided, wherein the PDC drill bit includes a drill body 1, a cutting blade 6, an annular protrusion 2 and a cutting tooth 3, and the cutting blade 6 is arranged on the crown of the drill body 1; The protruding part 2 is integrally ring-shaped or includes multiple segments located on a circumference, and the annular protruding part 2 protrudes from th...

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Abstract

The invention provides a polycrystalline diamond compact (PDC) bit. The PDC bit comprises a bit body, cutting blades, annular protrusions and cutting teeth, wherein the cutting blades are arranged on the crown of the bit body; the annular protrusions are annular as a whole or comprise multiple sections on a circumference and protrude from the top face of the crown; the cutting teeth are arranged on the cutting blades or arranged on the cutting blades and the annular protrusions. The PDC bit provided by the invention comprises the annular protrusions which can be annular as a whole or comprise multiple sections on the circumference, and the annular protrusions enable the PDC bit to keep a circular track while rotating, so that polygonal impact force is eliminated, and the cutting stability of the PDC bit is improved.

Description

technical field [0001] The present invention generally relates to an oil drilling technology, and specifically relates to a PDC drill bit. Background technique [0002] PDC bit is polycrystalline diamond compact bit, that is, Polycrystalline DiamondCompact Bit. Traditional diamond drill bits are usually equipped with 3-8 blades, and diamond drill bits with this structure have made contributions to oil extraction and exploration engineering. [0003] However, PDC drills are usually made of tungsten carbide or steel as the matrix, and sintered at high temperature with diamond as raw material and binder. Due to the existence of multiple materials, the PDC bit has poor thermal stability, strong brittleness, and poor ability to withstand impact loads. [0004] Appropriately increasing the number of cutting blades can improve the stability of the PDC bit and reduce the impact load when cutting the formation, thereby protecting the diamond polycrystalline layer and prolonging the...

Claims

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Application Information

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IPC IPC(8): E21B10/54E21B10/43E21B10/60
CPCE21B10/43E21B10/54E21B10/602
Inventor 王克行
Owner 莱州市原野科技有限公司