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Rotary drilling rig bit capable of impact drilling

A technology for rotary drilling rigs and drill bits, which is applied in the direction of drill bits, drill pipes, drill pipes, etc., and can solve the problems of single function, low operating efficiency, and poor applicability of DTH hammers, and achieve simple structure, improved operating efficiency, and improved efficiency. Effect

Inactive Publication Date: 2016-05-11
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing rotary drilling rig bits generally have defects such as poor applicability to harder rock formations, low operating efficiency, serious wear and heating of the drill bit, and single function of the down-the-hole hammer.

Method used

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  • Rotary drilling rig bit capable of impact drilling
  • Rotary drilling rig bit capable of impact drilling
  • Rotary drilling rig bit capable of impact drilling

Examples

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Effect test

Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0024] A kind of impactable rotary drilling rig drill bit of the present invention, as figure 1 As shown, it includes a flange 30 for connecting the machine body, and a drill pipe 1 arranged on the flange 30, a double helical blade 2 arranged on the outside of the drill pipe 1, and a submersible protruding from the head of the drill pipe 1. A hole hammer 4; a number of bullet picks 3 are arranged on the edge of the double helix blade 2. Preferably, the bullet pick 3 is made of cemented carbide.

[0025] Such as image 3 As shown, a spherical hammer body 28 and a groove 29 are arranged at intervals on the end face of the hammer head of the down-the-hole hammer 4 , and an air outlet 27 is arranged in the groove 29 . Preferably, the hammer head end of the down-the-hole hammer 4 is arranged as...

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Abstract

The invention provides a rotary drilling rig bit capable of impact drilling, which is reasonable in design, applicable to different strata and capable of improving working performance. The rotary drilling rig bit comprises a flange for connecting the machine body, a drill rod arranged on the flange, a double-screw blade arranged on the outer side of the drill rod, and a down-the-hole hammer which extends from the drill rod housing head of the drill rod and is in sliding arrangement, wherein a plurality of bullet-like cutting picks arranged on the edge of the double-screw blade; a propulsion mechanism connected with the down-the-hole hammer is arranged inside the drill rod housing. According to the invention, the advantages of the spiral drill rod and the down-the-hole hammer are combined to play, then the drill rod can perform impact grinding and further bring debris and soil out of the hole through rotation, the working efficiency is greatly improved, and the drill bit is good in applicability for the complicated stratum. The structure that the down-the-hole hammer is combined with the double-screw blade can perform impacting while drilling, so that the efficiency is greatly improved; the double-screw blade can bring the debris or soil out of the hole, so that the drill bit is not required to be changed frequently.

Description

technical field [0001] The invention relates to a drill bit of a rotary drilling rig, in particular to a drill bit of a rotary drilling rig capable of impacting. Background technique [0002] At present, rotary drilling rigs are mainly used in hole-forming operations in construction foundation projects, and are widely used in foundation construction projects such as road bridges and high-rise buildings. However, the drill bits of the current rotary drilling rigs cannot cope with more complex geological rock formations. The traditional drill bits have low operating efficiency and poor economy, and cannot meet the requirements of users. With regard to the single use of the down-the-hole hammer, deep drilling cannot be carried out, and the cylindrical drill bit needs to be replaced regularly to take soil and form holes, which increases additional unnecessary workload and lower operating efficiency. The scope of application of the above two methods of drilling is relatively nar...

Claims

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Application Information

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IPC IPC(8): E21B4/16E21B17/22E21B10/38E21B10/43E21B10/54E21B4/14
CPCE21B4/14E21B4/16E21B10/38E21B10/43E21B10/54E21B17/22
Inventor 胡磊祥史为品贾小龙王振峰张茂金
Owner CHANGAN UNIV
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