Roller bit with roller pull-off prevention alarm apparatus

A technology of early warning device and roller cone bit, which is used in drill bits, drilling equipment, earth-moving drilling, etc., can solve the problems of reduced bearing capacity, failure of anti-separation effect, plastic deformation of circlip grooves, etc., and achieves reduction in width and depth. , The effect of reducing drilling cost and increasing bearing area

Inactive Publication Date: 2003-12-31
SOUTHWEST PETROLEUM UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

The disadvantage is that when the wear amount of the gear tooth claw bearing pair is too large, the steel ball will come out from the gap between the inner hole of the cone tooth and the tooth claw journal, which has been worn out, which will cause the tooth tooth to fall off.
The circlip locking method is a technology used by Baker Hughes Company of the United States (US Patent No. 4491428). The problem with this technology is that when the thrust surface of the claw bearing is excessively worn, the bearing capacity of the bearing will decrease, and the circlip groove may undergo plastic deformation. Deformation, bite the circlip to death, making it lose its elasticity, resulting in the failure of the anti-off function
The prob

Method used

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  • Roller bit with roller pull-off prevention alarm apparatus
  • Roller bit with roller pull-off prevention alarm apparatus
  • Roller bit with roller pull-off prevention alarm apparatus

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Example Embodiment

[0029] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0030] The components of the roller cone bit are the same as those of the existing roller cone bit, and are mainly composed of a bit body (1) and a roller cone (4). The inner hole is installed on the tooth claw journal (2) of the drill bit body (1), and cooperates with each other to form a roller tooth claw bearing pair. The roller cone bit can be a single-cone bit, a double-cone bit, a tri-cone bit or a multi-cone bit, figure 1 Shown is a schematic diagram of a tricone bit. The teeth (5) can be inserts or milled. There is a sealing ring (3) and a locking device (6) for positioning and anti-dropping between the roller and claw bearing pairs. The locking device can be a steel ball locking device, or a circlip or other types of locking devices. The locking device (6) shown in Figure 2 adopts steel ball locking. An early warning device is arranged on ...

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Abstract

The present invention relates to roller cutter bit and features an early warning device set on the toothed claw shaft neck for prevent pineapple from falling off. The device consists of circumferential rollaway nest, roller inside the nest and locking wedge. After the bearing pair is abrased to preset dangerous limit, the pineapple is clamped in the shaft neck, the working torque and speed of the roller cutter bit will change abruptly, so that the bit to be failed may be replaced timely. The present invention can prevent pineapple from falling off and lower well drilling cost, and the locking wedge in the device has great bearing capacity so that the present invention can meet the requirement of different work conditions, especially great drilling pressure.

Description

Technical field: [0001] The invention relates to a roller cone bit and a roller bit used in various drilling projects (oil and gas drilling, mining engineering, foundation engineering construction, etc.). Background technique: [0002] The roller cone bit used in drilling engineering is usually made up of a drill bit body and a cone, and the cone is installed on the claw journal of the drill body. When the drill bit is working, the roller not only revolves around the axis of the drill bit together with the claw journal, but also rotates around the claw journal. Under this kind of compound motion, the teeth on the cones will impact, press in and scrape the rocks at the bottom of the well. In order to accurately install the cone on the claw journal and prevent the cone from falling off the claw journal, a set of steel balls or circlips are usually used as the positioning and anti-off device for the cone on the claw journal (Also known as locking device). The steel ball lock...

Claims

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Application Information

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IPC IPC(8): E21B10/08
Inventor 杨迎新林敏刘德明杨建忠
Owner SOUTHWEST PETROLEUM UNIV
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