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Large-diameter drilling and core taking device and method

A drilling core and large-diameter technology, which is applied in the direction of extracting undisturbed core devices, drill bits, drill pipes, etc., can solve the problem that the coring device cannot meet the needs of large-diameter coring, and achieve the identification of coal rock rock burst tendency demand, improve the core quality, and ease the drilling effect

Inactive Publication Date: 2020-01-14
HUAINAN MINING IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: how to solve the problem that the existing coring device cannot meet the needs of large-diameter coring

Method used

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  • Large-diameter drilling and core taking device and method
  • Large-diameter drilling and core taking device and method
  • Large-diameter drilling and core taking device and method

Examples

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Embodiment 1

[0044] Such as Figure 1-Figure 3 As shown, the large-diameter drilling coring device includes a coring bit 1, a core tube 2, and a screw head 3 connected in sequence, and the coring bit 1, the core tube 2 and the screw head 3 are connected to form a front end that is empty. core space.

[0045] Such as figure 2 As shown, the core drill bit 1 has a diameter of Φ133mm, an external diameter of the drill bit of Φ130mm, and a wall thickness of 8mm. The front end is welded with a plurality of blades 11 along the circumference. In this embodiment, the blades are diamond composite sheets. mm, and four "V-shaped" water outlets 12 are processed at the front end of the drill bit. The diamond composite sheet is made of cemented carbide material, with a tensile strength of 750MPa-1500MPa, while the normal tensile strength of rocks in the rock formations taken is 20MPa-200MPa, and the maximum tensile strength is 350MPa, which can meet the needs.

[0046] Such as image 3 As shown, the...

Embodiment 2

[0065] The difference between this embodiment and the first embodiment is that the length of the core pipe 2 is 500 mm.

[0066] In Example 1, the length of the core tube 2 is 1m. Because the diameter difference between the core tube 2 and the drilled hole is small (about 3mm), coal and rock powder deposits in the drilled hole for a long time are easy to slagging and the slag is not smooth, resulting in buried drilling and coring. Failed, therefore, this embodiment processes a 500mm long core tube, reduces the length of the difference between the core tube 2 and the borehole diameter and the length of a single coring, to ensure the integrity of slag removal and coring.

Embodiment 3

[0068] The difference between the present embodiment three and the embodiment one is: the method of taking out the rock core from the rock core tube 2 is different in step S05;

[0069] The method of removing the core from the core tube 2 in Embodiment 1 is easy to cause destructive force on the core; in this embodiment, after the drilling rig is leveled, the pressure water is turned on to flush the core out of the core tube 2 to avoid damage from knocking core.

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Abstract

The invention discloses a large-diameter drilling and core taking device. The large-diameter drilling and core taking device comprises a core-taking drilling bit, a rock core tube and a screw head connected in sequence, the outer diameter of the core-taking drilling bit is at least Phi130mm. The invention further discloses a large-diameter drilling and core taking method. The large-diameter drilling and core taking method comprises the following steps that initial position drilling is conducted, the screw head, the rock core tube and the core-taking drilling bit are connected to form an assembly to be loaded into a hole for being connected with a drilling rod, core-taking drilling is started, drilling rod removing after core taking is conducted, the rock core tube and the core-taking drilling bit are removed, the rock core is taken out, the soundness condition of the rock core tube and the core-taking drilling bit is checked, and drilling for core taking is repeatedly conducted to thedesigned depth. The large-diameter drilling core taking device has the beneficial effects that the demand for identification of tendentiousness of coal rock bursting ground pressure can be met, the core taking rate is increased, and the rock core quality is improved.

Description

technical field [0001] The present invention relates to a coring device and method, in particular to a coring device and method. Background technique [0002] Drilling and coring is a method of taking out rock mass (coal body) through drilling technology. At present, the drilling and coring routine is a 90mm diameter coring process. However, according to the national and Huainan Mining Group coal rock rock burst tendency identification requirements, the conventional core diameter cannot meet the needs. [0003] Application number: CN201320369378.X, which discloses a large-diameter drilling and coring device for soft and hard interbedded rock mass, including a hydraulic device, a drill pipe, a drill device, and a hydraulic connection pipe. The drill device is tubular, and it is characterized in that 1.1. The bottom of the rock core cutting device is provided with a rock core cutting device; the described rock core cutting device is an arc cutter, including a cutter head and ...

Claims

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Application Information

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IPC IPC(8): E21B25/00E21B10/02E21B10/48E21B17/042
CPCE21B10/02E21B10/48E21B17/042E21B25/00
Inventor 魏涛方有向石德洲殷广标
Owner HUAINAN MINING IND GRP
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