Electromagnetic measurement while drilling system for wire line core drilling
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A measurement-while-drilling and electromagnetic technology, which is applied in the field of drilling, can solve the problems that the electromagnetic measurement-while-drilling system cannot be applied, and achieve the effect of saving tripping time and improving drilling efficiency
Inactive Publication Date: 2014-12-10
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Oil drilling generally does not require coring, and the existing electromagnetic measurement-while-drilling system can only be used for comprehensive drilling without coring, while geological prospecting drilling and scientific Drill measurement system cannot be applied
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[0017] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.
[0018] Such as figure 1 As shown, the electromagnetic measurement-while-drilling system for wireline coring drilling of the present invention includes a downhole drilling tool and a ground receiving system.
[0019] The downhole drilling tool includes an outer pipe assembly and an inner pipe assembly. Wherein, the outer tube assembly includes an upper joint 1, a cartridge chamber 2, a fiberglass cloth 3, an epoxy resin 4, a key 5, an insulating ring 6, an insulating joint 7, an intermediate joint 8, an outer core tube 9, and a drill bit 10. The upper joint 1 and the cartridge chamber 2 are connected by threads, and the cartridge chamber 2 and the insulating joint 7 are separated by an insulating ring 6 and connected by...
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Abstract
The invention relates to an electromagnetic measurement while drilling system for wire line core drilling. The electromagnetic measurement while drilling system comprises a down-hole drilling tool and a ground receiving system. The down-hole drilling tool comprises an outer pipe assembly and an inner pipe assembly. The outer pipe assembly comprises an upper connector, an elastic clamping chamber, an insulation ring, an insulation connector, an intermediate connector, an outer core barrel and a drill bit. The inner pipe assembly comprises a salvaging spearhead, a recovery pipe, a hoisting connector, a battery pack, a control circuit board, an emission circuit board, an inner pipe insulation part, a gauging nipple, a pipe plug, a core valve sleeve, a core valve, a core inner pipe, a clamping spring and a clamping spring seat. The ground receiving system comprises a drill tower, a receiver, a computer and an antenna, and the drill tower, the receiver, the computer and the antenna are connected. According to the electromagnetic measurement while drilling system for wire line core drilling, the advantages of the wire line core drilling technology can be utilized, tripping operation time is substantially saved, drilling efficiency is improved, and in the drilling process, parameters such as a drill hole track and state can be transmitted to the ground in real time.
Description
technical field [0001] The invention relates to the field of drilling, in particular to an electromagnetic measurement-while-drilling system for wireline coring drilling. Background technique [0002] In the process of deep hole and directional hole drilling, it is very important to control the drilling trajectory. The electromagnetic measurement-while-drilling system can monitor the drilling state parameters and transmit them to the ground in real time through wireless electromagnetic waves. It has the advantages of high signal transmission rate and is not affected by drilling fluid. In recent years, the depth of geological prospecting drilling has continued to increase and scientific deep hole and ultra-deep hole drilling have flourished. The implementation of these holes urgently requires the use of measurement-while-drilling systems. At present, electromagnetic measurement-while-drilling systems are widely used in oil drilling. Oil drilling generally does not require c...
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