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Polycrystalline diamond compact (PDC) bit arranging method

A layout method and drill bit technology, which is applied in the direction of drill bits, drilling equipment, earthwork drilling, etc., can solve the problems of cutting tooth wear, cutting red wear degree difference, and affecting the life of the drill bit, etc.

Active Publication Date: 2015-08-05
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

From the actual drilling process, it is found that there is a problem in the design of the drill bit. The wear degree of each cutting edge is quite different, and some cutting teeth are severely worn, and the drill bit is forced to pull out early, thus affecting the life of the drill bit.

Method used

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

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Embodiment Construction

[0036] The details of the present invention can be understood more clearly with reference to the accompanying drawings and the description of specific embodiments of the present invention. However, the specific embodiments of the present invention described here are only for the purpose of explaining the present invention, and should not be construed as limiting the present invention in any way. Under the teaching of the present invention, the skilled person can conceive any possible modification based on the present invention, and these should be regarded as belonging to the scope of the present invention.

[0037] refer to Figure 4 As shown, the present invention discloses a method for arranging a PDC drill bit 100, which includes the following steps:

[0038] Obtain the cutter thickness of each cutter 2;

[0039] Carry out a cutting test, and obtain the degree of wear of each cutting tooth 2;

[0040] obtaining an adjustment factor for each cutter 2 based on the degree ...

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Abstract

The invention discloses a PDC bit arranging method. the method comprises the steps of obtaining the thickness of each cutting tooth; performing cutting test to obtain the abrasion degree of each cutting tooth; obtaining the adjustment coefficient of each cutting tooth based on the abrasion degree of each cutting tooth; obtaining the correction thickness of each cutting tooth based on the adjustment coefficient of each cutting tooth and the cutting tooth thickness, and arranging the PDC bit based on the correction thickness of each cutting tooth. By the aid of the method, abrasion losses of the cutting teeth on all PDC blades during abrasion are analyzed, the cutting teeth largest in abrasion losses are found through a statistic analysis method to perform reinforcement, and accordingly, drill bit weak spots are reinforced, and the drill bit service life is prolonged.

Description

technical field [0001] The invention relates to the field of oil exploitation, in particular to a method for arranging PDC drill bits. Background technique [0002] With the deepening of exploration and development of oil and gas fields, the formation structures encountered are becoming more and more complex, and drilling is becoming more and more difficult. In order to improve the overall cost of drilling, higher requirements are put forward for the quality of drill bits. Since the advent of the PDC bit in the 1980s, it has gradually become a highly efficient rock-breaking tool widely used in the oil and gas industry due to its high average ROP, large footage, and long life. The understanding of the first generation of PDC drill bits is deepening, its production technology is also improving, and the amount of use is increasing year by year. [0003] PDC (Polycrystalline diamond compact) is a cutting element that welds artificial polycrystalline diamond and tungsten carbide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/46
CPCE21B10/43E21B10/54
Inventor 张国辉孔璐琳徐鹏张希文
Owner PETROCHINA CO LTD
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