A PDC drill bit lateral force balance tooth placement method considering dynamic wear

A lateral force and tooth arrangement technology, applied in geometric CAD, design optimization/simulation, special data processing applications, etc., can solve problems such as the inability to guarantee the balance of lateral force of worn drill bits, reduce the amount of calculation and difficulty, and improve efficiency. , the effect of improving computing efficiency

Active Publication Date: 2020-10-30
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

[0005] The present invention provides a PDC drill bit lateral force balance tooth arrangement method considering dynamic wear, aiming at solving the problem that the current lateral force balance tooth arrangement method can only ensure the lateral force balance of the new PDC bit, but cannot guarantee the lateral force balance of the worn drill bit The problem

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  • A PDC drill bit lateral force balance tooth placement method considering dynamic wear

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Embodiment Construction

[0039] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0040] In the present invention, a PDC drill bit lateral force balance tooth arrangement method considering dynamic wear, such as figure 1 As shown, the method steps are:

[0041] ① Generate the initial tooth placement structure, the number m of the initial tooth placement structure is greater than the dimension n of the tooth placement parameter, and the initial tooth placement structure constitutes a set X;

[0042] Wherein, each initial tooth arrangement structure corresponds to a set of tooth arrangement parameters; the tooth arrangement parameters include the forward angle parameters, side rotation angle parameters, normal angle parameters, circumferential angle parameters, axial position parameters and radial parameters of the cutting teeth on the PDC bit. The dimension n of the tooth placement parameter refers to the number of tooth placement paramete...

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Abstract

The invention relates to a PDC drill bit lateral force balanced tooth arrangement method considering dynamic wear and belongs to the kinetic field of oil and gas drilling tools. The method mainly comprises a total of 17 steps, including the step of generating an initial tooth arrangement structure; the step of obtaining a PDC drill bit lateral force average value Y; the step of constructing a function model F; the step of finding an optimal tooth arrangement structure p<o>; the step of calculating PDC drill bit lateral force average values Y<G> and Y<Z> corresponding to the optimal tooth arrangement structure p<o'>; and the step of outputting the final tooth arrangement structure p<o'> and the corresponding PDC drill bit lateral force average value Y<Z>. Through the method, it can be guaranteed that lateral force borne by a PDC drill bit is always at a low level under the condition that cutting teeth are worn continuously, the problem that lateral force balance of a worn drill bit cannot be guaranteed currently is solved, vibration of the PDC drill bit can be reduced, and drilling precise and rock breaking efficiency of the PDC drill bit are improved.

Description

technical field [0001] The invention relates to a PDC drill bit lateral force balance tooth arrangement method considering dynamic wear, and belongs to the dynamic field of oil and gas drilling tools. Background technique [0002] PDC bit is a drilling tool commonly used in the oil drilling industry. Statistics show that at present, the share of PDC drill bits in the world oil and gas drilling market has reached 80%, accounting for more than 90% of the world's total drilling footage, and has become the main drill bit in the field of oil drilling. In actual drilling engineering, the PDC bit breaks the rock under the joint action of drilling pressure and torque. At this time, the rock will give a reaction force to the cutter. The resultant force of all reaction forces in the plane perpendicular to the drilling direction is the bit. Generally, the lateral force of the PDC bit is purely harmful and useless, which not only affects the life of the PDC bit, but also affects the dr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06F30/20
CPCG06F30/17G06F30/20
Inventor 马亚超黄志强李琴张富晓
Owner SOUTHWEST PETROLEUM UNIV
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