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 o

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1

[0036] A through-hole type single-action dual-tube drilling tool includes an inner tube 1 and an outer tube 2 sleeved outside the inner tube 1. A diamond drill 3 is connected to the bottom of the outer tube 2 and the upper end of the outer tube 2 is connected to an 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 driving joint 4 through a connecting member, the connection The component and the upper driving joint 4 are provided with a flushing passage communicating with the inner tube 1.

[0037] The connecting component includes 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, and 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...

Example Embodiment

[0042] Example 2

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

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

[0045] The main shaft 8 between the thrust ball bearing 9 and the flushing side hole 14 is provided with a sealing sleeve 19.

[0046] An oil seal 20 is provided 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 vert...

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PUM

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Abstract

The invention discloses a through-hole single-action double-pipe drilling tool, which includes an inner pipe and an outer pipe sleeved outside the inner pipe. The bottom of the outer pipe is connected with a diamond drill bit, and the upper end of the outer pipe is connected with an upper drive joint. ; The bottom of the inner tube is provided with a spring seat, and the spring seat is provided with a spring; the upper end of the inner pipe is connected to the upper drive joint through a connecting part, and the connecting part and the upper drive joint are provided with a The flushing passage communicated by the inner tube. Through this design, the flushing passage is designed on the connecting parts and the upper drive joint. After the drilling tool reaches the bottom of the hole (100 to 250 mm away from the bottom of the hole), the pump is turned on to punch the hole, and the water flow can reach the bottom of the hole directly. Due to the high flow rate and high pressure, The residue at the bottom of the hole is taken out of the ground from the gap in the hole wall with the water flow, and the bottom of the hole will be washed away, which is beneficial to drilling and the integrity of the core. In this way, the drilling efficiency and the integrity rate (recovery rate) of the core are increased by 10% to 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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