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Method for determining parameter of polycrystalline diamond compact bit

A composite drill bit and polycrystalline diamond technology, which is applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as nozzle size, position, and angle that have not been optimized and determined, and cannot be optimized and determined.

Inactive Publication Date: 2011-09-28
CHENGDU BEST DIAMOND BIT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the past, the determination of the size, angle and position of the PDC drill bit nozzle was often carried out based on experience, and the size, position and angle of the nozzle were not optimized or could not be determined optimally
Unable to play the role of cooling composite sheet of drilling mud, assisting rock breaking and preventing mud bags better

Method used

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  • Method for determining parameter of polycrystalline diamond compact bit
  • Method for determining parameter of polycrystalline diamond compact bit
  • Method for determining parameter of polycrystalline diamond compact bit

Examples

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Embodiment Construction

[0011] attached figure 1 It shows the bottom view of the PDC drill bit viewed from the bottom of the drill bit, which shows the structure of the main part of the drill bit, where the letter B indicates the blade, and the number of blades is multiple. B1, B2, and B3 are used in this application. ..Bn way to sort them, n represents the number of blades. The letter N indicates the nozzle, and there are multiple nozzles, which are sorted in the manner of N1, N2, N3...Nn in this application; the letter C indicates the cutting teeth, and the number is multiple.

[0012] attached figure 2 A side view of the PDC bit is shown, where the right arrow indicates the drilling fluid inlet 1, while the left arrow indicates the drilling fluid outlet 2, the drilling fluid inlet flow rate of inlet 1 is represented by the letter P, and the drilling fluid outlet The outlet pressure of 2 is represented by the letter P.

[0013] attached image 3 The steps to determine the parameters of the PDC...

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Abstract

The invention discloses a method for determining the parameter of a polycrystalline diamond compact bit. The bit comprises blades arranged on a bit matrix, a plurality of cutting teeth arranged on each blade, and drilling liquid spray nozzles arranged corresponding to the blades. The method comprises the steps of: designing the three-dimensional geometrical model of the bit; setting predefined position, angle and size for each spray nozzle; inputting the model into fluid analysis software for simulation analysis, thereby obtaining an analysis result; analyzing and judging the analysis result, if the analysis result is not accordant with design requirements, readjusting the positions, the angles and the sizes of the spray nozzles; and repeating the steps (1)-(3) until the simulation analysis result is accordant with the requirements.

Description

technical field [0001] The invention relates to the field of equipment used in petroleum gas drilling and production, in particular to a method for determining nozzle-related parameters of a polycrystalline diamond compact (PDC) drill bit used in this type of equipment. Background technique [0002] The drilling industry has used rotating drag bits for nearly a hundred years and has undergone significant changes since then. The most common rotary pull drills today are diamond-impregnated drills and those with polycrystalline diamond compact (PDC) cutting elements. PDC bit cutting elements typically include a disk-shaped diamond "table" formed on a support substrate (eg cemented tungsten carbide (WC) substrate, etc.) and bonded to the substrate under high temperature and pressure conditions. A number of individual PDC cutting elements are inserted and secured (eg, brazed, etc.) into grooves in the bit face and form inserts protruding from the face, or mounted to stand uprigh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 况雨春闭磊杜向东李猛彭小军饶岩岩
Owner CHENGDU BEST DIAMOND BIT
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