Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Injection type suction drilling tool for cutting removal of drilling center of weak formation and using method of drilling tool

An ejector-type, formation-based technology, which is applied in the direction of liquid/gas jet drilling, drill pipe, drill pipe, etc., can solve difficult problems, achieve reliable sealing, improve drilling efficiency, and simple operation and installation

Inactive Publication Date: 2016-07-20
CHONGQING UNIV
View PDF7 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a kind of ejection type suction drilling tool for drilling center slag discharge in soft formation and its use method. The drilling tool jets into the central slag discharge channel through the high-pressure injection channel, forming a negative pressure area in the central slag discharge channel, and produces a suction effect on the drilling cuttings at the bottom of the drilling hole through the slag inlet hole on the side of the drill bit, and sucks the drilling cuttings into The slag discharge is carried out in the central slag discharge channel, and at the same time, the jet air ejected from the injection hole on the side of the cutter head is used to stir the bottom of the drilling hole, and push the drilling cuttings at the bottom of the hole to move into the slag inlet hole, so as to promote the cuttings at the bottom of the hole Enter the central slag discharge channel through the slag inlet hole, improve the slag inlet efficiency of the slag inlet hole, and solve the problems encountered in the drilling process of the existing coal seam gas pumping and drainage holes, such as stuck drill, buried drill and difficult slag discharge in the hole. Improve drilling efficiency and drilling depth

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Injection type suction drilling tool for cutting removal of drilling center of weak formation and using method of drilling tool
  • Injection type suction drilling tool for cutting removal of drilling center of weak formation and using method of drilling tool
  • Injection type suction drilling tool for cutting removal of drilling center of weak formation and using method of drilling tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Such as figure 1Shown is the cross-sectional view of the power part of the ejection type suction drilling tool used for drilling the central slag discharge in the soft formation; as figure 2 Shown is the cross-sectional view of the drill bit part of the ejection type suction drilling tool used for drilling the center of slag discharge in the soft formation; as image 3 Shown is the cross-sectional view of the drill bit in the ejection type suction drilling tool used for drilling the central slag discharge in the soft formation; as Figure 4 Shown is the perspective view of the drill bit in the ejection type suction drilling tool for drilling into the center of slagging in soft formations according to the present invention. The ejection type suction drilling tool for drilling into the center of slag removal in soft formations of the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an injection type suction drilling tool for residual removal of a drilling center of a weak formation. The drilling tool comprises an air inlet pipe, a cutting removal pipe, a power head and a drill rod, wherein a cutting removal passage and an air inlet passage are formed in the drill rod; an injection type suction drill bit is arranged at the front end of the drill rod; cutting heads are arranged on the end part of the injection type suction drill bit; cutting inlets are formed in the top sidewall of the injection type suction drill bit; injection holes are formed in the inner sidewalls of the cutting heads; high-pressure injection passages are formed in the injection type suction drill bit. According to the drilling tool, a negative pressure area is formed in the cutting removal passage by jetting of the high-pressure injection passages in the cutting removal passage of the center, a suction effect on drilling cuttings is achieved by the cutting inlets, a stirring effect on the bottom of a borehole is achieved by air jets injected by the injection holes, and the drilling cuttings at the bottom of the borehole are driven to be transferred into the cutting holes, and are promoted to enter the cutting removal passage of the center through the cutting inlets, so that the problems of jamming of the drilling tool, burying of the drilling tool, difficulty in removal of the cuttings in the borehole and the like in an existing coal bed gas exhaust drilling process are solved, the drilling efficiency is greatly improved, and the drilling depth is greatly increased.

Description

technical field [0001] The invention belongs to the technical field of special methods or equipment for drilling, and in particular relates to an ejector-type suction drilling tool for slag discharge in the drilling center of soft formations and its application method. Background technique [0002] Coalbed methane has been widely concerned as an unconventional natural gas energy source and has an important impact on underground coalbed gas outbursts. The use of drilling methods to carry out advanced drilling in the coal seam working face and implement coalbed gas drainage operations is the key to realize the utilization and prevention of coalbed methane. The main method of underground coal seam gas outburst. The existing coal seam drilling adopts traditional positive circulation drilling technology and tools. Due to the development of coal seam cracks and soft texture, during the drilling process, the drilling flushing medium enters from the center of the drilling tool. Duri...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/18E21B17/042E21B17/046E21B21/07E21B21/16
CPCE21B7/18E21B17/042E21B17/046E21B21/07E21B21/16
Inventor 梁运培何将福殷琨胡千庭罗永江李全贵
Owner CHONGQING UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products