Method and device for improving pore-forming efficiency of rotary drilling rig

A technology for rotary drilling rigs and digging rigs, which is applied to drilling equipment and methods, rotary drilling rigs, rotary drilling, etc., to achieve the effects of improving hole forming efficiency and ensuring mechanical construction efficiency

Active Publication Date: 2013-01-16
DAYUAN CONSTR GRP
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Problems solved by technology

[0004]Through the on-site analysis of the main reasons one by one, the main reasons are finally determined: the flow rate of the three-position four-way valve does not meet the current use requirements, that is, the three-position four-way (electromagnetic) valve The flow rate does not meet the requirements of the rated work of the hydraulic motor; the power head has poor sealing performance against mud and water

Method used

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  • Method and device for improving pore-forming efficiency of rotary drilling rig
  • Method and device for improving pore-forming efficiency of rotary drilling rig
  • Method and device for improving pore-forming efficiency of rotary drilling rig

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Embodiment 1

[0031] see figure 2 , A pressure reducing valve and a two-position two-way (electromagnetic) valve are added to the oil circuit system to adjust the pressure of the relief valve, and the pressure-reducing valve is connected in parallel with the two-position two-way valve. The two-position two-way valve changes the on-off relationship between the pipelines by changing the position of the spool in the valve body; when used in parallel with the pressure reducing valve, when the pressure of the main oil circuit reaches 25Mpa, the two-position two-way valve closes, Pressure reducing valve through oil. The model of the two-position two-way valve is K23TK-20, the standard aperture is Φ20, the flow rate is 110~120L / min, and the operating pressure is 0.2~0.8 MPa; the model specification of the pressure reducing valve: PR(C)V-G / T20, the maximum pressure is 25MPa; The pressure adjustment range is 1~10MPa; the flow rate is 90-120L / min. Set the pressure reducing valve to 8Mpa and contro...

Embodiment 2

[0035] The present invention designs a power head anti-mudwater sealing protection device, see the attached image 3 , the protection device includes a shock absorber 1, a mudwater infiltration prevention device 2, and a power head cover 5, wherein the mudwater infiltration prevention power head device 2 includes a mud-proof cover 3 and a sealing ring 4.

[0036] Because the muddy water infiltration device 2 is mainly used for waterproofing, the mud-proof cover 3 is to select a thickness of 23mm and the outer diameter is φ836mm, and the inner diameter is φ500mm steel plate to be processed into an annular ring, and 24 circles with a diameter of φ20mm are drilled on the circumference of φ600mm. Hole 6 can connect the mud shield 3 and the lower power system body through the round hole 6, and squeeze the sealing ring 4; according to the width of the sealing ring 4, the outer diameter of the annular ring is processed to be 1120mm, the inner diameter is φ700mm, and the depth is 10mm...

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Abstract

The invention provides a method and a device for improving the pore-forming efficiency of a rotary drilling rig. By the method, a hydraulic oil path system and a power head sealing protection device of a drilling rig are improved, so that the pore-forming efficiency of the drilling rig on a sand clay layer is improved. The pore-forming efficiency of the drilling rig on the sand clay layer is greatly improved by improving the hydraulic oil path system and the power head sealing protection device of the drilling rig, and the mechanical construction efficiency is guaranteed.

Description

Technical field: [0001] The invention relates to the field of drilling rigs, and in particular aims at the existing drilling rigs, and designs a device and a method for improving the hole-forming efficiency of the rotary drilling rig in sand, mud and clay layers. Background technique: [0002] Existing digging rigs on the market adopt a hydraulic power configuration rotating mechanism, which converts hydraulic power into mechanical cutting force to carry out rotary excavation operations on soil or rock and soil. It can be used for dry digging with short auger bits or wet digging with swivel bits in the presence of mud guards. [0003] However, in actual use, the rotary drilling efficiency of the rotary excavator cannot meet the normal requirements. If the rotary drilling efficiency continues to be used, the construction period will be affected and economic losses will be caused. The average rotary drilling volume of the rotary drilling rig is 8 cubic meters per hour in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B3/02
Inventor 杨向东郝书明王连兴韩莹汤长礼左大虎李永顺刘长征
Owner DAYUAN CONSTR GRP
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