Inward-rotating and outward-braking double-pipe drilling device
A technology of drilling device and brake pipe, applied in rotary drilling, impact drilling, rotary drilling rig and other directions, can solve the problems of not increasing the probability of hole collapse, stop of hollow rotary joints, impossible to salvage, etc. To achieve the effect of reducing the risk of hole collapse and buried drilling, increasing the service life and reducing the risk of breaking the oil pipe
Pending Publication Date: 2020-11-27
陶德明
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] 2. The existing technology transmits the working medium to the working device at the bottom of the hole through the hollow rotary joint, which involves the stop problem of the hollow rotary joint
Because in the reality of traditional construction, collapsed holes and buried drills occur from time to time, and salvage is almost impossible, and the probability of hole collapse cannot be increased due to the stop structure
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0025] The above description is only an overview of the present invention. In order to understand the technical means of the present invention more clearly and implement it according to the contents of the description, the preferred embodiments of the present invention will be described in detail below with accompanying drawings.
[0026] The inner drill pipe 3 can use Φ219mm 42CrMo seamless steel pipe, the outer brake pipe 4 can use Φ323mm Q345B seamless steel pipe, the transition brake cylinder 5 can use Q345B steel plate splicing or cold-drawn square pipe, and the central rotary joint 6 can use The assembly body processed by 20CrMo carburizing material, the working device 7 adopts a drill bit composed of a hydraulic impact hammer group.
[0027] First, fix the inner ring (42) of the central rotary joint (6) on the inner drill pipe (3), fix the outer brake pipe (4) on the outer ring (41) of the central rotary joint (6), and the inner drill pipe (3) The lower end is connected...
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
Login to View More Abstract
The invention discloses an inward-rotating and outward-braking double-pipe drilling device, and belongs to pile foundation engineering drilling machines and tools. A drill rod in a braking device is connected to a power head of a ground drilling machine, is downwards connected to a hydraulic down-the-hole hammer drill bit, and transmits torque to the hydraulic down-the-hole hammer drill bit; an outer brake pipe is connected with the outer ring of a central rotary joint, is connected to the ground section by section, and is stopped by a stop frame on the power head. When an inner drill rod rotates, the inner ring of the central rotary joint rotates, and the outer ring of the central rotary joint does not rotate due to connection with the outer brake pipe, so that a hydraulic oil pipe on theouter side of the outer brake pipe does not rotate, a hydraulic oil pipe does not wind a drilling tool, and the hydraulic down-the-hole hammer drill bit can continuously rotate and drill in one direction. The device is simple in structure and convenient to operate, the directional problem that when the drilling tool continuously rotates in one direction during drilling, a functional hydraulic pipeline arranged outside the drilling tool in a hole does not wind the drilling tool is solved, and the world blank of the industry is filled up.
Description
technical field [0001] The invention belongs to a pile foundation engineering drilling tool, in particular to a safe and reliable anti-rotation mechanism of a hydraulic pipeline. Background technique [0002] In the prior art, it is very difficult to carry out piling construction in the rock layer during the construction of the pile foundation in the rock layer. The most advanced piling technology in the rock layer is to use a pneumatic down-the-hole hammer and a hydraulic down-the-hole hammer bit, and a hydraulic down-the-hole hammer bit During use, the hydraulic oil pipe is externally placed on the drilling tool; during construction, the existing technology cannot solve the problem that the hydraulic oil pipe is wrapped around the drilling tool when the drilling tool rotates, resulting in the drilling tool can only rotate left and right during the drilling process and cannot Continuous rotation will affect the drilling quality (the verticality of the drilling is not good)....
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/00E21B17/04E21B17/05E21B3/02
CPCE21B7/00E21B17/04E21B17/05E21B3/02
Inventor 陶德明
Owner 陶德明