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Efficient drilling combined coring PDC drill bit

A combined, drill bit technology, applied in drill bits, undisturbed core extraction devices, drilling equipment, etc., can solve the problems of inability to adjust the PDC bit, low drilling speed, and small cuttings size.

Active Publication Date: 2016-07-13
CANGZHOU GREAT DRILL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The present invention solves the problem that the existing PDC bit cannot be adjusted according to the degree of softness and hardness of the geology, which leads to low drilling speed and the small size of cuttings cannot meet the geological requirements for rock information identification; and provides a combination of high-efficiency drilling Type core PDC bit, which can adjust the PDC cutting teeth according to the softness and hardness of the formation, so as to increase the drilling speed

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0043] The high-efficiency drilling combined core-taking PDC drill bit of this embodiment includes a drill bit base body, and the drill bit base body is provided with gauge teeth, long blades and short blades, and the long blades and short blades are arranged at intervals from each other. The central area of ​​the drill bit base body is provided with a first through hole for the core to enter when drilling, and the drill bit base body is also provided with a breaking through hole and a second through hole, and the two ends of the breaking through hole are respectively connected to the first through hole. The through hole communicates with the second through hole; there is an inclination angle between the broken through hole and the first through hole; large-diameter PDC cutting teeth are distributed on the long blade, and small-diameter PDC cutting teeth are distributed on the short blade. Teeth, the long blade can reciprocate along the axis direction of the drill base body; th...

Embodiment 2

[0045] The high-efficiency drilling combined core-taking PDC drill bit of this embodiment includes a drill bit base body, and the drill bit base body is provided with gauge teeth, long blades and short blades, and the long blades and short blades are arranged at intervals from each other. The central area of ​​the drill bit base body is provided with a first through hole for the core to enter when drilling, and the drill bit base body is also provided with a breaking through hole and a second through hole, and the two ends of the breaking through hole are respectively connected to the first through hole. The through hole communicates with the second through hole; there is an inclination angle between the broken through hole and the first through hole; large-diameter PDC cutting teeth are distributed on the long blade, and small-diameter PDC cutting teeth are distributed on the short blade. Teeth, the long blade can reciprocate along the axis direction of the drill base body; th...

Embodiment 3

[0047] The high-efficiency drilling combined core-taking PDC drill bit of this embodiment includes a drill bit base body, and the drill bit base body is provided with gauge teeth, long blades and short blades, and the long blades and short blades are arranged at intervals from each other. The central area of ​​the drill bit base body is provided with a first through hole for the core to enter when drilling, and the drill bit base body is also provided with a breaking through hole and a second through hole, and the two ends of the breaking through hole are respectively connected to the first through hole. The through hole communicates with the second through hole; there is an inclination angle between the broken through hole and the first through hole; large-diameter PDC cutting teeth are distributed on the long blade, and small-diameter PDC cutting teeth are distributed on the short blade. Teeth, the long blade can reciprocate along the axis direction of the drill base body; th...

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Abstract

The invention belongs to the technical field of PDC drill bits, discloses an efficient drilling combined coring PDC drill bit, and aims to solve the problems that the drilling speed is low as a conventional PDC drill bit cannot be adjusted according to geological hardness and the requirement that rock information is identified geologically cannot be met as the size of rock debris is relatively small. The efficient drilling combined coring PDC drill bit comprises a drill bit base body, wherein gauge teeth, a long cutter wing and a short cutter wing are arranged on the drill bit base body; the long cutter wing and the short cutter wing are arranged at an interval; a first through hole into which a rock core is fed during drilling is formed in the central area of the drill bit base body; a breaking through hole and a second through hole are further formed in the drill bit base body; two ends of the breaking through hole are respectively communicated with the first through hole and the second through hole; an inclined angle is formed between the breaking through hole and the first through hole; large-diameter PDC cutting teeth are distributed on the long cutter wing; small-diameter PDC cutting teeth are distributed on the short cutter wing; the long cutter wing can make reciprocation movement in the axial direction of the drill bit base body.

Description

technical field [0001] The invention belongs to the technical field of PDC drill bits, in particular to a combined core-taking PDC drill bit for efficient drilling. Background technique [0002] PDC (Poly Diamond Composite) drill bits are widely used in petroleum and geological fields as a drill bit with high hardness, wear resistance and service life. The main way for the PDC bit to break the rock is to cut the rock. Because it generally has 3-7 blades, more than a dozen composite sheets, and the rock is heterogeneous, there is a severe lateral vibration when the PDC bit is working, which weakens the Efficiency in breaking rock. In order to suppress the lateral vibration of the drill bit, some drill bits have strengthened the gage structure, so that the diameter of the gage structure is slightly larger than the diameter of the drill bit, and the gage structure domain is in close contact with the well wall in a large area, thereby effectively suppressing the lateral vibrati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/43E21B10/62E21B10/60E21B25/10
CPCE21B10/43E21B10/602E21B10/62E21B25/10
Inventor 张占奎
Owner CANGZHOU GREAT DRILL