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Combined core drilling system driven by downhole motor and impactor

A motor-driven, impactor technology, which is used in percussion drilling, reciprocating drilling rigs, and undisturbed core extraction devices, can solve the problems of large drill string wear, large power consumption, and easy blockage of cores. Low power consumption and low wear

Inactive Publication Date: 2006-02-08
中国大陆科学钻探工程中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the disadvantages of the existing coring drilling, such as easy blockage of core, large power consumption, large wear of the drill string and matching special drill string, the present invention provides a combined core drilling driven by a bottom hole motor and an impactor. system, the drilling system can not only perform core drilling, but also save energy, reduce the wear of the drill string, increase the length of core drilling, and prevent the drilling

Method used

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  • Combined core drilling system driven by downhole motor and impactor
  • Combined core drilling system driven by downhole motor and impactor

Examples

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Embodiment 1

[0015] Embodiment 1: as figure 1 As shown, the downhole motor and impactor driven combined core drilling system in this embodiment is composed of a downhole motor, a valve-type double-acting impactor, a coring tool and a core bit. The upper end of the bottom hole motor is connected with the drill string, and the lower end of the bottom hole motor drive shaft 17 is connected with the upper joint 35 of the valve-type double-acting impactor by threads. The bottom-hole motor drive shaft 17 is supported in the bottom-hole motor housing 19 by the upper cemented carbide bearing 21, the thrust ball bearing 20 and the lower cemented carbide bearing 18, and the bottom-hole motor drive shaft 17 is provided with a bottom shaft Motor power shaft connection structure, here the power shaft connection structure is a threaded joint 23, and the top of the bottom hole motor drive shaft casing 19 has a bottom hole motor casing connection structure, which is a connection interface 22 here. The va...

Embodiment 2

[0018] Embodiment 2: as figure 2As shown, the bottom-hole motor and impactor-driven combined core drilling system in this embodiment is similar to Embodiment 1, the difference is that in this embodiment, the bottom-hole motor and the coring tool are arranged between Jet impactor. The jet impactor is composed of a jet impactor upper joint 46, a jet element 45, an outer cylinder 44, an inner cylinder 43, a piston 42, a cylinder head 41, a middle joint 40, a hammer 39, a jet impactor outer tube 38, and an anvil. Sub-under joint 37 and octagonal cover 36 constitute. The lower end of the drive shaft 17 of the bottom hole motor is threaded with the upper joint 46 of the jet impactor; the lower joint 37 of the anvil of the jet impactor is threaded with the upper joint 16 of the upper end of the core drilling tool.

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Abstract

The present invention relates to core drilling system in geological exploration, petroleum drilling, scientific drilling and other industry, and is especially one combined core drilling system driven with well motor and impactor for core drilling in hard rock and deep hole. The combined core drilling system includes coring tool and coring bit connected to the lower end of the coring tool as well as well motor and impactor with upper end connected to the lower end of the motor driving shaft and lower end connected to the upper end of the coring tool. The well motor provides the coring tool and the coring bit with rock crushing torque, and the impactor provides the coring tool and the coring bit with rock crushing impact force. The core drilling system can lower power consumption, reduce wear of drilling rod, raise drilling length each coring and prevent drilling hole from becoming inclined.

Description

technical field [0001] The invention relates to a core drilling system used in geological exploration, oil drilling, scientific drilling and other industries, especially the combination of bottom motor and impactor driven core drilling in hard rock and deep holes. Core drilling system. Background technique [0002] In geological exploration, oil drilling, scientific drilling and other industries, the core drilling methods that adopt cylindrical cores include surface-driven core extraction, surface-driven rope coring, surface-driven reverse circulation continuous coring, and bottom-hole motor-driven core drilling. Drilling hearts etc. At present, surface-driven core drilling or surface-driven wireline core drilling is mainly used to realize core drilling. The core is taken by the method of pipe, and the driving power of the latter is also from the drill string of mechanical transmission, and the core pipe is taken out of the drill string without lifting the drill string by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B25/00E21B1/26
Inventor 王达张伟张晓西杨甘生贾军杨凯华朱永宜谢文卫赵尔信倪家騄张培丰朱文鉴王永平樊腊生叶建良
Owner 中国大陆科学钻探工程中心
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