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Roller bit with parallelly inlaid teeth

A technology of roller cone bits and inserts, which is applied to drill bits, drilling equipment, earth-moving drilling, etc., can solve the problem that the interlayer stratum cannot be drilled economically and effectively, the soft stratum cannot be drilled efficiently, and the insert cutting edge is not wide. and other problems, to achieve the effect of improving cutting conditions, low cost, and preventing mud bag phenomenon

Inactive Publication Date: 2004-11-03
SINOPEC OILFIELD EQUIP CORP
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Inserts are usually made of cemented carbide, which has high hardness and wear resistance, but the cutting edge of the inserts is not wide, so it cannot drill efficiently in soft formations
It can be seen that the existing steel teeth and the toothed roller bit cannot be economically and effectively used for the drilling of interlayer formations.
In order to overcome the above-mentioned problems, a kind of roller cone bit with oblate alloy teeth with long tooth crown is proposed in U.S. Patent No. 5,421,423. Although this drill bit can be effectively used in interlayer formations, the oblate alloy teeth and the cone The interference fit when inserting oblate holes requires high machining accuracy for both the tooth and the hole. Therefore, the production of such oblate alloy toothed roller cone bits is not only difficult to process, but also has low production efficiency and high processing costs. , expensive, poor economy

Method used

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  • Roller bit with parallelly inlaid teeth
  • Roller bit with parallelly inlaid teeth
  • Roller bit with parallelly inlaid teeth

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Embodiment Construction

[0010] The embodiment of the present invention is further described below in conjunction with the accompanying drawings, including the palm and the cone 1, the palm is connected with the cone through the cantilever shaft at the bottom, usually 1-3 cones can be installed, the structure of the cone As shown in Figures 1 and 2, there is a coupling hole 5 inside the cone, and the shape of the cone is bevel-toothed. There are tooth grooves 6 on the ring, thus forming gear teeth. The gear teeth are in the shape of straight bevel teeth, and the tooth direction is consistent with the direction of the generatrix of the cone cone. Teeth 2, the inserts are hard alloy inserts of conventional shape, and can also be made of other high-hardness and high-strength materials. Wedge shape, the gap between the two inserts is 3mm.

[0011] The second embodiment of the present invention is such as image 3 As shown, the main difference between it and the previous embodiment is that the teeth of t...

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Abstract

A roller bit with parallelly inlaid teeth is composed of tooth base and toothed roller with tooth ring and splines, and features that 2-3 cylindrical teeth are parallelly inlaid on the top of each roller tooth on tooth ring along the direction of roller tooth. Its advantags are high cutting performance, easy machining. It is suitable for the sandwith stratum containing soft and hard strata.

Description

technical field [0001] The invention relates to a roller cone bit used for oil, natural gas, mine and geological well drilling, in particular to a roller cone bit with side-by-side inserts. Background technique [0002] The roller cone bit has been widely used as a tool for drilling formation rock formations. The roller cone bit is usually composed of a cone tooth palm. There can be one or more cones. The tooth palm is movably matched with the cone hole through the cantilever shaft at the lower part so that the cone can rotate around the cantilever shaft of the tooth palm. The outer surface of the cone The cutting structure breaks the rock formation under the action of impact, crushing and sliding shear generated by the compound motion formed by the rotation, rotation and longitudinal feed of the cone table. The existing roller cone bits are divided into two types: steel tooth drill bits and insert bit. Among them, the teeth of the steel tooth drill bits are integrated with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/16E21B10/52
CPCE21B10/16E21B10/52
Inventor 陈志华
Owner SINOPEC OILFIELD EQUIP CORP
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