Anti-release well-opening three-ratchet drill bit
A drill bit and claw wheel technology, applied in the field of three-claw wheel drill bits for drilling wells, can solve the problems of loose connection between the cone and the claw, easy to fall off, etc., and achieve the effect of solving the problem of not tight connection and high practicability
Inactive Publication Date: 2017-10-10
广汉川亿石油科技有限公司
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Problems solved by technology
[0003] The purpose of the present invention is to provide a three-claw wheel drill bit that can prevent falling off, so as to solve the problem that the connection between the cone and the tooth claw of the existing roller cone bit is not tight and easy to fall off
Method used
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[0018] Such as figure 1 As shown, the three-claw wheel drill bit for opening wells that can be prevented from falling off in the present invention includes a cone 1 and claws 2. A journal 3 is arranged between the cone 1 and claws 2, and a shaft journal 3 is arranged at the lower end of the claws 2. A connecting column 4 and a cylindrical disk 5 made of solid steel, one end of the connecting column 4 is connected to the end of the claw 2, and the other end is connected to the cylindrical disk 5, the axis of the connecting column 4 is connected to the journal 3 The axes coincide, and the diameter of the cylindrical disk 5 is greater than the diameter of the connecting column 4; the axial direction of the journal 3 also has a through hole, which matches the connecting column 4; the inside of the cone 1 An installation hole matching the outer surface of the journal 3 is also provided, and a groove is opened at the bottom of the installation hole, and the groove matches the outer ...
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The invention discloses an anti-release well-opening three-ratchet drill bit. The anti-release well-opening three-ratchet drill bit comprises a roller cone and a jaw. A shaft neck is arranged between the roller cone and the jaw, and a connecting column and a cylindrical disc which are made of solid steel are arranged at the lower end of the jaw; one end of the connecting column is connected with the end of the jaw, and the other end of the connecting column is connected with the cylindrical disc; the axis of the connecting column coincides with the axis of the shaft neck, and the diameter of the cylindrical disc is larger than that of the connecting column; and a through hole is further formed in the shaft neck in the axial direction and is matched with the connecting column, an installation hole matched with the outer surface of the shaft neck is further formed in the roller cone, and a groove is further formed in the bottom of the installation hole and is matched with outer surface of the cylindrical disc. According to the anti-release well-opening three-ratchet drill bit, the problem that a roller cone and a jaw of an existing roller cone drill bit are not tightly connected, and therefore release is prone to occurring is solved.
Description
technical field [0001] The invention relates to the technical field of drilling and mining, in particular to a three-claw wheel drill bit for opening a well that can be prevented from falling out. Background technique [0002] Roller cone bits are the most widely used in oil drilling and geological drilling. The roller cone bit has the functions of impacting, crushing and shearing the formation rock when it rotates, so the roller cone bit can adapt to various soft, medium and hard formations. Especially after the appearance of the jet roller cone bit and the long nozzle roller cone bit, the drilling speed of the roller cone bit has been greatly improved, which is a major revolution in the history of the development of the roller cone bit. According to the type of teeth, the roller cone bit can be divided into milling tooth (steel tooth) roller cone bit, insert tooth (tungsten carbide teeth mounted on the roller cone) roller cone bit; according to the number of roller cones,...
Claims
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IPC IPC(8): E21B10/25
CPCE21B10/25
Inventor 郭帅
Owner 广汉川亿石油科技有限公司