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Novel pdc and roller cone composite drill bit

A composite drill bit and roller cone technology, used in drill bits, drilling equipment, earthwork drilling, etc., can solve the problems of low center cutting efficiency, low drilling stability, slow drilling speed, etc., to improve cutting efficiency and improve resistance. The ability to drift laterally, the effect of reducing wear

Active Publication Date: 2018-10-09
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention mainly aims at the problems of low center cutting efficiency, slow drilling speed, low drilling stability and short life of the drill bit in the pdc and roller cone composite drill bit, and provides a new type of pdc and roller cone composite drill bit

Method used

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  • Novel pdc and roller cone composite drill bit
  • Novel pdc and roller cone composite drill bit

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the embodiments and the accompanying drawings.

[0029] Such as Figure 1-5 Shown, a kind of novel pdc of the present invention, roller cone compound drill bit, comprise drill bit body 1, tooth palm 2, cutting blade 3, spherical cone 4, described tooth palm 2 is provided with bearing 12, and described spherical tooth The outer surface of the wheel 4 is provided with cutting teeth. It is characterized in that the spherical cone 4 is installed on the bearing 12 of the tooth palm 2. The shape and size of the tooth palm 2 and the cutting blade 3 are the same. The tooth palm 2 1. The outer sides of the cutting blades 3 are provided with pdc cutting teeth 5 and are fixed on the bit body 1. The spherical cone 4 is located directly above the bit body 1, and its center line coincides with the axis of the bit body 1; the spherical tooth The range of the vertical distance between the center of the sphere of...

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Abstract

The invention discloses a novel pdc and roller cone composite drill bit. The novel pdc and roller cone composite drill bit comprises a drill bit body, a roller cone palm, a cutting blade, and a spherical roller cone. The spherical roller cone is installed the roller cone palm. The outer sides of the roller cone palm and the cutting blade are provided with pdc cutting teeth and fixed on the drill bit body. The spherical roller cone is positioned above the drill bit body, and a center line of the spherical roller cone is coincided with an axis of the drill bit body. A vertical distance between asphere center position of the spherical roller cone and a highest point of the cutting blade is within a range of 18-29 mm. The side face of the roller cone palm is provided with an oil storage seal.According to the related novel composite drill bit, in a drilling process, a bit pressure is shared by the pdc cutting teeth and the roller cone together, a pressure applied to each tooth is reduced,the wear-resistant capacity of the drill bit is improved, thereby the service life of the whole drill bit is prolonged. In addition, because a position of the oil storage seal is closer to the top ofthe drill bit, a sensitivity of a drill bit lubricating system for sensing a bottom hole pressure is improved, and the drill bit is positioned in the better lubricating environment, so the service life of the drill bit is improved.

Description

technical field [0001] The invention relates to the fields of oil and gas drilling engineering, mining engineering, construction engineering foundation construction, geological drilling, hydrology and non-excavation technology, in particular to a novel pdc and roller cone composite drill bit. Background technique [0002] In oil and gas drilling engineering, it is necessary to use rock-breaking tools to break rocks, and drill bits are commonly used rock-breaking tools for breaking rocks to form well holes. The drill bits used in traditional drilling engineering mainly include roller cone bits and pdc bits. [0003] The roller cone bit mainly breaks rock by impact crushing. When the drill bit rotates and drills, the linear speed of the roller cone is fast, and the teeth on the roller cone produce impact crushing effect on the rock at the bottom of the well to break the rock. Its rock-breaking torque is small, the contact area between the cutting teeth and the bottom of the w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/08E21B10/54E21B10/18E21B10/24
CPCE21B10/08E21B10/18E21B10/24E21B10/54Y02P70/10
Inventor 邓嵘汤小瑞张文汀陈科敬斌杰郭恩宏李邱洋
Owner SOUTHWEST PETROLEUM UNIV
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