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Well drill

A drill bit and hollow drill pipe technology, which is applied in the direction of drill bits, drilling equipment, earthwork drilling, etc., can solve the problems of waste of resources, low working efficiency of the drill bit, low pressure of the drill bit, etc., and achieve steel saving, high working efficiency and fast footage speed Effect

Inactive Publication Date: 2012-09-19
汪湛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The common structure of the existing drilling bits and the like is that a plurality of tool seats are arranged at the end of the hollow drill rod, and a plurality of knives are arranged on the tool seat; If the stress area is large, the pressure generated by the drill bit is small, so the working efficiency of the drill bit is low; in addition, the existing drilling bits have multiple tool holders, and multiple cutter heads are also a waste of resources.

Method used

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Embodiment

[0024] Drill bit 6 diameters D=600mm, cutter 5 long L=40mm, the included angle of left cutter holder 2, right cutter holder 3 with hollow drill rod 1 is 45 °.

[0025] According to the formula

[0026] N ≤ D 2 b

[0027] Wherein b=Lsin α=40sin45°=28.28, 2b=56.56, then N≤600 / 56.56=10.6, so N takes 10 pieces of knife 5 at most.

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Abstract

The invention discloses a well drill relating to an improvement of a well drill structure and provides a well drill with high working efficiency. The well drill comprises a hollow drill and is structurally characterized in that a left knife block and a right knife block at the top of the hollow drill are symmetrically arranged left and right; the projection of the knife of the left knife block on the hollow drill is located on the projection of the knife of the right knife block on the hollow drill; and the number of the knives is calculated by the following formula, wherein D represents the diameter of the drill and b represents the projection of the knife on the diameter of the drill.

Description

technical field [0001] The present invention relates to the improvement of the drilling bit structure. Background technique: [0002] The common structure of the existing drilling bits and the like is that a plurality of tool seats are arranged at the end of the hollow drill rod, and a plurality of knives are arranged on the tool seat; If the stress area is large, the pressure produced by the drill bit is small, so the working efficiency of the drill bit is low; in addition, the existing well drilling bit with multiple tool holders and multiple cutter heads is also a waste of resources. Invention content: [0003] The present invention aims at the problems mentioned above and provides a drilling bit with high working efficiency. [0004] In order to achieve the above object, the present invention adopts the following technical scheme. The present invention includes a hollow drill rod, and its structural points are that the left and right tool holders at the end of the hol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/00
Inventor 汪湛
Owner 汪湛