Double-wall spindle power head for core drill

A technology of core drilling rig and power head, which is applied in the direction of rotary drilling rig, earthwork drilling, drilling equipment, etc. It can solve the problems of poor waterproof and sealing performance, low degree of automation, and long auxiliary working time, so as to improve reliability and maintainability, simple and compact structure, and the effect of improving drilling efficiency

Inactive Publication Date: 2011-07-27
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The degree of automation of drilling and coring operations is not high, and the use of wireline coring requires opening the hole first, which increases the difficulty of remote control and automated drilling
[0005] 2. When coring with the traditional power head, it is neces

Method used

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  • Double-wall spindle power head for core drill
  • Double-wall spindle power head for core drill
  • Double-wall spindle power head for core drill

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: a kind of double-wall mandrel core drilling rig power head of the present invention is used for underwater core drilling rig drilling, and its structure is as follows figure 1 As shown, it includes an outer box body, a power mechanism, a transmission system, a spindle and a sealing unit, and the power mechanism uses a waterproof motor 12; the outer box body is composed of a box assembly 1 and an upper box cover 2, The box assembly is welded by plates, figure 1 The black part in the middle box assembly is a welding symbol. The box assembly and the upper box cover are positioned by positioning pins and connected with screws; the transmission system is composed of the driving gear shaft 4 and the driven gear 9; the mandrel is double-walled The mandrel is composed of the mandrel outer tube 7 and the mandrel inner tube 8. The faucet joint 16 is welded together with the mandrel outer tube 7. The flushing liquid passes through the annular space between the double...

Embodiment 2

[0033] Embodiment 2: A power head of a double-wall mandrel core drilling rig of the present invention is used for land core drilling. The power mechanism of the power head adopts a hydraulic motor 12, and other structures are the same as in Embodiment 1. The working state of the power head is as follows: Figure 6 and Figure 7 shown. see Figure 6 , the power head 17 feeds along the tower 21 during the drilling process, and its own mandrel has a rotary motion at the same time. During this process, the drill pipe 20 is connected to the power head 17 for rotary drilling, and the wireline coring sampler 18 is suspended by a steel cable and stored in the mandrel inner tube 8 of the power head 17 . exist Figure 7 In the process, the power head 17 stops rotating, and the rope coring sampler 18 is lowered into the orifice 19 for rope coring. In traditional wireline coring, it is necessary to remove the power head 17 in most cases so that the wireline coring sampler 18 can be p...

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PUM

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Abstract

The invention relates to a double-wall spindle power head for a core drill. The power head comprises an outer box body, a power mechanism, a transmission system, a spindle and a sealing unit, wherein the outer box body consists of a box body assembly and an upper box cover which are positioned by a positioning pin and connected by a screw; the power mechanism is a hydraulic motor or a motor; the transmission system consists of a driving gear shaft and a driven gear; the double-wall spindle consists of a spindle outer tube and a spindle inner tube; the spindle outer tube is connected with the driven gear through a spline; the driving gear shaft and the spindle outer tube, and the box body assembly and the upper box cover are connected through a rolling bearing respectively; a shaft hole and a key groove are reserved on the driving gear shaft and used for connecting the power mechanism; the spindle outer tube is provided with a through hole for washing solution to pass through; a sampler can be stored in a cavity of the spindle inner tube; and the sealing unit comprises a dynamic seal and a static seal. The power head has a compact structure and high sealing property, provides rotary motion, rotary torque and washing solution for the drilling of the drill, and is suitable for underwater and land core drilling; and an orifice is not required to be avoided and a water tap is not required to be disassembled when a core is taken.

Description

technical field [0001] The invention relates to geological drilling equipment, in particular to a power head of a double-wall mandrel core drilling rig. Background technique [0002] In seabed geological exploration, gas hydrate detection, seabed crust stability exploration, seabed crust change, seabed prospecting and paleoclimate research all require seabed drilling technology, and seabed drilling rigs are widely used in seabed drilling. Currently in subsea drilling, the drilling equipment is usually placed on the seabed, while the operator controls it remotely from the ship. Therefore, in subsea drilling, in addition to meeting the requirements of the same level of land drilling rigs, higher requirements are also placed on the degree of automation, remote control performance, sealing performance, and reliability of the drilling rig. [0003] However, the existing domestic core drilling rigs are generally not highly automated and rely heavily on manual assistance, resultin...

Claims

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Application Information

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IPC IPC(8): E21B3/02E21B21/00
Inventor 李波高厚秀张琦朱文林张国栋邹成文国军曾志军张凤敏丁腾飞
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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