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Construction method for drilling of rotary drilling rig in complicated geological formation

A technology for rotary drilling rigs and complex formations, applied in drilling equipment and methods, drilling equipment, earthwork drilling and production, etc. It can solve the problems of unguaranteed punching quality, slow punching speed of percussion drilling, and large consumption of drilling tools. Achieve the effect of saving the time of replacing the drill bit, reducing the construction cost and saving time

Pending Publication Date: 2018-12-18
CHINA HYDROPOWER ELEVENTH ENG BUREAU ZHENGZHOU CO LTD +1
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages of percussion drill punching speed, low efficiency, large consumption of drilling tools and unguaranteed punching quality existing in the existing technology of rock drilling construction that first breaks around the periphery and then breaks in the middle, and provides a rotary drilling machine. The construction method of drilling rigs in complex geological formations, which effectively reduces the impact of drilling on pile formation, improves construction efficiency and construction quality, and reduces construction costs

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  • Construction method for drilling of rotary drilling rig in complicated geological formation
  • Construction method for drilling of rotary drilling rig in complicated geological formation
  • Construction method for drilling of rotary drilling rig in complicated geological formation

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Embodiment Construction

[0026] The technical solutions of the present invention will be further elaborated and described below in conjunction with the accompanying drawings and specific embodiments.

[0027] A construction method for drilling a rotary drilling rig in complex geological formations, such as Figure 1-5 As shown, it is applied to the station enclosure structure of the Sea World Station. The station enclosure structure of the Sea World Station is a drilled occlusal pile. The construction of the intermediate reinforced drilled pile before the initial setting of the plain pile may cause excessive erosion and damage to the entire plain pile body. Deformation damage such as collision will affect the structural integrity and waterproof performance, and it is not conducive to the development of multiple construction work surfaces. Therefore, the occlusal pile occlusal method adopts hard occlusal. Rotary drilling rigs are used for construction, and impact drilling rigs are used for auxiliary co...

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Abstract

The invention discloses a construction method for drilling of a rotary drilling rig in a complicated geological formation. The method includes steps: wedge-shaped angle steel is welded on inner wallsof a cylindrical drill and a roller bit by employing an improved cone cylindrical drill or a pick cylindrical drill to enable the periphery of rocks to perform crushing cutting, after the top is clamped with a rock core, the rock core is twisted off back and forth through forward and reverse rotation to directly bring out a rock sample, the problems of difficult hole forming in the hard rock formation and hole shift and hole deviation caused by uneven pile heads of two sides of an engagement pile are solved, the influence of drilling on pile forming is effectively reduced, the construction efficiency and the construction quality are improved, and the construction cost is reduced. According to the construction method, compared with a percussion drilling construction method, the footage speed is fast, the footage of a percussion drilling at each time is usually 0.5-0.8 m, the rotary drilling rig can achieve the footage of 5-10 meters in cooperation with a drilling tool at each time, thedrilling machine can be sensed in time during change of the hardness of the formation, the rotating speed of the drilling machine and the pressure are adjusted to control the verticality of holes, andthe hole-forming quality is guaranteed.

Description

technical field [0001] The invention belongs to the construction field, and in particular relates to a construction method for drilling a rotary drilling rig in complex geological formations. Background technique [0002] The existing rock-entry construction is that the percussion drill impacts and the drilling tool first breaks the surrounding rocks, then uses the auger bit to break in the middle, and finally adopts a sand bucket or a double-door pick bit to take out the broken rock. Impact drilling is an earlier traditional technology, which is more applicable to strata and construction sites, but the construction speed is too slow, and it is not suitable for municipal projects with tight construction schedules; it is first broken around the middle and then broken in the middle, and finally the slag method is more commonly used, but Construction progress cannot be guaranteed. details as follows: [0003] 1) Use the percussion drill to punch the hole, the speed is slow, b...

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Application Information

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IPC IPC(8): E21B7/00E02D5/38
CPCE21B7/00E02D5/38
Inventor 闫世庆唐佳肖勇姚标
Owner CHINA HYDROPOWER ELEVENTH ENG BUREAU ZHENGZHOU CO LTD
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