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Through hole type single-action double-tube drill tool

A single-acting double-tube, through-hole technology, which is applied in the direction of drill bits, drill pipes, drill pipes, etc., can solve the problems of slag dropping, dirty hole bottom, and unsatisfactory punching effect, and achieve improved integrity rate and flow rate. high effect

Pending Publication Date: 2017-11-21
无锡锡钻地质装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The single-acting double-tube drilling tool is still widely used in shallow surface drilling due to its narrow lip surface and good drilling effect. clean, the bottom of the hole needs to be flushed, but the main shaft of the existing single-action double-tube drilling tool is solid, and the flushing water can only flow in through the gap between the inner pipe and the outer pipe, while the spring seat and the inner pipe are plugged Type connection, the spring seat is seated on the drill bit step, which hinders the outflow direction of the water flow, so that the punching effect is not very ideal, and the bottom of the hole cannot be rinsed clean.
Lead to incomplete coring and idling of drilling, reducing drilling efficiency and core integrity

Method used

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  • Through hole type single-action double-tube drill tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]A through-hole single-action double-tube drilling tool, comprising an inner tube 1 and an outer tube 2 sleeved outside the inner tube 1, the bottom of the outer tube 2 is connected with a diamond drill bit 3, and the upper end of the outer tube 2 is connected to the upper drive The joint 4 is connected; the bottom of the inner tube 1 is provided with a circlip seat 5, and the circlip seat 5 is provided with a circlip 6; the upper end of the inner tube 1 is rotatably connected with the upper drive joint 4 through a connecting part, and the connection A flushing passage communicating with the inner tube 1 is provided on the components and the upper drive joint 4 .

[0037] The connecting parts include an inner pipe joint 7 and a main shaft 8, the upper end of the inner pipe 1 is connected to the inner pipe joint 7, the upper end of the inner pipe joint 7 is connected to the main shaft 8, and the upper end of the main shaft 8 is connected to the upper end through a thrust ba...

Embodiment 2

[0043] As an optimization of Embodiment 1, the upper end of the inner pipe joint 7 is connected to the main shaft 8 through threads, and the main shaft 8 is provided with an inner pipe adjusting nut 15 .

[0044] The upper end of the main shaft 8 is provided with a retaining ring 16 cooperating with the thrust ball bearing 9 and a locking nut 17 locking the retaining ring 16 . The locking nut 17 is covered with a screw cover 18 .

[0045] A seal sleeve 19 is provided on the main shaft 8 between the thrust ball bearing 9 and the flushing side hole 14 .

[0046] An oil seal 20 is arranged on the main shaft 8 at the upper end of the screw cover 18 and the lower end of the sealing sleeve 19 .

[0047] The inner pipe joint 7 is also provided with an overflow hole 21, the inner port of the overflow hole 21 communicates with the inner pipe 1, and the outer port communicates with the gap between the inner pipe 1 and the outer pipe 2; the overflow hole 21 contains There is a vertical ...

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PUM

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Abstract

The invention discloses a through hole type single-action double-tube drill tool which comprises an inner tube and an outer tube. The outer tube sleeves the inner tube, a diamond drill bit is connected with the bottom of the outer tube, and an upper driving connector is connected with the upper end of the outer tube; a clamp spring seat is arranged at the bottom of the inner tube, and a clamp spring is arranged on the clamp spring seat; the upper end of the inner tube is rotationally connected with the upper driving connector by a connecting component, and washing passages which are communicated with the inner tube are arranged on the connecting component and the upper driving connector. The through hole type single-action double-tube drill tool in the design has the advantages that the washing passages are arranged on the connecting component and the upper driving connector, pumps can be started to punch holes after the through hole type single-action double-tube drill tool reaches hole bottoms (the through hole type single-action double-tube drill tool is separated from the hole bottoms by distances ranging from 100 millimeters to 250 millimeters), water flow can directly reach the hole bottoms, the through hole type single-action double-tube drill tool is high in flow rate and pressure, accordingly, residues at the hole bottoms can be carried out of the ground from gaps of hole walls along with the water flow, the hole bottoms can be thoroughly washed, the through hole type single-action double-tube drill tool is favorable for drilling and the integrity of rock cores, the drilling efficiency can be improved by 10%-20%, and the integrity rate (the core recovery rate) of the rock cores can be increased by 10%-20%.

Description

technical field [0001] The invention relates to a through-hole single-action double-tube drilling tool. Background technique [0002] The single-acting double-tube drilling tool is still widely used in shallow surface drilling due to its narrow lip surface and good drilling effect. clean, the bottom of the hole needs to be flushed, but the main shaft of the existing single-action double-tube drilling tool is solid, and the flushing water can only flow in through the gap between the inner pipe and the outer pipe, while the spring seat and the inner pipe are plugged Type connection, the spring seat is seated on the drill bit step, which hinders the outflow direction of the water flow, makes the punching effect not very satisfactory, and cannot clean the bottom of the hole. It leads to incomplete coring and idling of drilling, which reduces drilling efficiency and core integrity. There is an urgent need in the prior art for a through-hole single-action double-tube drilling to...

Claims

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Application Information

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IPC IPC(8): E21B21/00E21B25/00E21B17/04E21B10/46E21B7/28
CPCE21B7/28E21B10/46E21B17/04E21B21/00E21B25/00
Inventor 徐颂贤张世文
Owner 无锡锡钻地质装备有限公司
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