Drill bit mounting structure for screw drill
A technology of screw drilling tool and installation structure, which is applied to drill bits, driving devices for drilling in wellbore, drilling equipment, etc. The effect of hole operation accuracy, high practicability, and easy disassembly and replacement
Pending Publication Date: 2019-11-22
YANCHENG XINYONGJIA PETROLEUM MACHINERY MFG
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Problems solved by technology
[0003] The connection between the drill bit and the transmission shaft of the existing screw drilling tools is not stable enough, so that the mechanical vibration generated during the high-speed rotation of the drill bit will easily cause the drill bit to deviate from the axis over time, thereby affecting the accuracy of the drilling operation, and after damage The drill bit is not easy to disassemble
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[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0026] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative relationship between the various components in a certain posture (as shown in the drawings). When the positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly. In addition, the descriptions involving "first", "second" and so on in the present invention are only for descriptive purposes, and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical soluti...
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The invention discloses a drill bit mounting structure for a screw drill and relates to the technical field of well drilling equipment. The drill bit mounting structure comprises a screw drill body and a drill bit, wherein the screw drill body comprises a tube body and a transmission shaft; the drill bit is arranged at the bottom of the tube body and in transmission connection with the transmission shaft; the transmission shaft comprises a shaft body I; a clamping groove is formed in the end part, close to the drill bit, of the shaft body I; a ring-shaped clamping block is concentrically arranged in the clamping groove; the drill bit comprises a rod and a head connected with the rod; a ring-shaped clamping groove is formed in the end part, far away from the head, of the rod; and the ring-shaped clamping block can be clamped and fixed in the ring-shaped clamping groove, thereby locking or separating the transmission shaft and the drill bit. By the adoption of the drill bit mounting structure disclosed by the invention, the connection between the drill bit and the transmission shaft can be steadier; the occurrence of the axis deviation situation, caused by mechanical vibrations, of the drill bit can be avoided; and the hole drilling operation accuracy can be guaranteed.
Description
technical field [0001] The invention relates to the technical field of drilling equipment, in particular to a drill bit installation structure of a screw drilling tool. Background technique [0002] The screw drilling tool is a volumetric downhole power drilling tool that uses drilling fluid as power and converts fluid pressure energy into mechanical energy. When the mud pumped by the mud pump flows through the bypass valve and enters the motor, a certain pressure difference is formed at the inlet and outlet of the motor, which pushes the rotor to rotate around the axis of the stator, and transmits the speed and torque to the drill bit through the cardan shaft and the transmission shaft , so as to realize the drilling work. [0003] The connection between the drill bit and the transmission shaft of the existing screw drilling tools is not stable enough, so that the mechanical vibration generated during the high-speed rotation of the drill bit will easily cause the drill bit...
Claims
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IPC IPC(8): E21B4/02E21B10/00
CPCE21B4/02E21B4/006E21B10/00
Inventor 叶俊杰徐永和王涛刘华文
Owner YANCHENG XINYONGJIA PETROLEUM MACHINERY MFG