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Composite drill bit with core rock breaking capability improved

A composite drill bit and rock-breaking technology, applied in drill bits, drilling equipment, earth-moving drilling, etc., can solve the problems of weak cutting ability, drill bit failure, core wear, etc., to improve tooth density, strengthen rock-breaking ability and resistance to Wear capacity, improve the effect of rock breaking efficiency

Inactive Publication Date: 2015-12-02
BAOJI PETROLEUM MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a composite drill bit that strengthens the rock-breaking ability of the core, which solve

Method used

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  • Composite drill bit with core rock breaking capability improved
  • Composite drill bit with core rock breaking capability improved
  • Composite drill bit with core rock breaking capability improved

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] refer to figure 1 , figure 2 , image 3 The first structure of the composite drill bit of the present invention is to include a drill body 1, three long blades 2 and three short blades 6 are arranged at intervals around the axis of the head of the drill body 1, and each long blade 2 is from the inside to the The outer area is set in sequence as an inner cone area, a nose area, a shoulder area and a gauge area, and each short blade 6 is only provided with an inner cone area; all long blades 2 and short blades 6 are equipped with fixed cutting teeth 3, The fixed cutter 3 is made of polycrystalline diamond composite sheet;

[0026] A cone 4 is correspondingly arranged on the radially outer sides of the three short blades 6, and a group of nozzles 7 are correspondingly arranged at the space between each long blade 2 rear and the adjacent cone 4 (one group is two, three There are six groups in total); the inner hole of the cone 4 is sleeved on the tooth claw 8 through th...

Embodiment 2

[0030] refer to Figure 4 , Figure 5 The second structure of the composite drill bit of the present invention is that four long blades 2 and two short blades 6 are arranged on the head of the drill body 1, and the two short blades 6 and the four long blades 2 are evenly arranged along the circumference , two short blades 6 are arranged symmetrically along the diameter, two long blades 2 are arranged symmetrically on both sides of the two short blades 6, and a cone 4 is respectively arranged on the radially outer side of the two short blades 6, and the cone 4 is installed on On the claw 8, the claw 8 is fixedly installed on the drill bit body 1, and a nozzle 7 (four in total) is arranged at each long blade 2 rear position.

[0031] refer to Image 6 The third structure of the composite drill bit of the present invention is that, based on the structures of the above-mentioned embodiments 1 and 2, the inner tapered regions of the short blade 6 and the long blade 2 are all arra...

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Abstract

The invention discloses a composite drill bit with core rock breaking capability improved. The composite drill bit comprises a drill bit body, three long knife wings and three short knife wings are arranged at the head of the drill bit body and around axis at intervals, each long knife wing is provided with an inner cone area, a nose area, a shoulder area and a gauge protection area sequentially from inside to outside, each short knife wing is provided with an inner cone area only, fixed cutting teeth are mounted on all long knife wings and short knife wings, a cone is arranged on the radial outer side of each short knife wing correspondingly, a group of nozzles are arranged at an empty position between space below each long knife wing and the adjacent cone, each cone is connected on a drill bit jaw in a sleeved manner, each drill bit jaw and the drill bit body are fixedly connected together, and cone cutting teeth are uniformly distributed on the outer surface of each cone. By the composite drill bit, total footage and net drilling time are increased; the composite drill bit is especially suitable for drilling of abrasive formations containing quartz sandstone.

Description

technical field [0001] The invention belongs to the technical field of mechanical equipment, and relates to a compound drill bit which strengthens the rock-breaking ability of the core. Background technique [0002] At present, in oil, natural gas and other prospecting drilling operations, roller cone bits and PDC (polycrystalline diamond compact) bits are mainly used. When drilling into abrasive formations (such as quartz-containing sandstone formations), the outer row of teeth, wheel backs and claw tips of the roller cone bit wear quickly, which may easily lead to bearing failure and borehole diameter reduction; PDC bits are difficult to penetrate into the formation, or eat After entering the formation, it is easy to wear and tear, resulting in low footage of the drill bit and failure of the shoulder and gage area of ​​the drill bit. [0003] There is an existing roller cone and PDC composite drill bit (public number CN104024557A). Compared with conventional PDC drill bit...

Claims

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Application Information

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IPC IPC(8): E21B10/50E21B10/43E21B10/60
Inventor 邓宝石擎天闫静刘晓旭
Owner BAOJI PETROLEUM MASCH CO LTD