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Rock sample in-situ fidelity coring system

A fidelity and in-situ technology, applied in the field of oil and gas field exploration, can solve the problems of slow blade cooling speed, short blade service life, fast tool wear, etc., and achieve the effect of accelerating cooling speed, prolonging life and reducing wear

Pending Publication Date: 2019-07-05
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Coring tools include core drilling tools and core catchers. After the core drilling tools cut into the formation, the core catchers are used to keep the core in the inner cylinder. The existing core catchers can only take soft rocks, and it is difficult to take hard rocks.
In addition, the cooling speed of the blade of the existing core drilling tool is slow, the wear of the tool is fast, and the service life of the blade is short

Method used

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  • Rock sample in-situ fidelity coring system
  • Rock sample in-situ fidelity coring system
  • Rock sample in-situ fidelity coring system

Examples

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Embodiment Construction

[0053] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0054] Such as figure 1 As shown, the rock sample fidelity coring system disclosed in the present invention includes a drive module 300, a fidelity module 200 and a coring module 100 connected in sequence, a coring module core drilling tool, a core sample storage cylinder, a fidelity The module includes the core sample preservation chamber, the drive module includes the core drilling rig, and the core drilling rig includes the unlocking mechanism of the outer cylinder of the drilling rig

[0055] Such as figure 2 As shown, the rock core preservation chamber includes a mechanical part and a control part, and the mechanical part includes an inner coring barrel 28, an outer coring barrel 26 and an accumulator 229, and the accumulator 229 communicates with the outer...

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Abstract

The invention discloses a rock sample in-situ fidelity coring system. The rock sample in-situ fidelity coring system comprises a driving module, a fidelity module and a coring module which are sequentially connected, the coring module comprises a rock core drilling tool and a rock core sample storage cylinder, the fidelity module comprises a rock core sample fidelity cabin, the driving module comprises a coring drill rig, and the coring drill rig comprises a drill rig outer cylinder unlocking mechanism; the rock core drilling tool comprises a coring drill tool, a core catcher and an inner corepipe, the coring drill tool comprises an outer core pipe and a hollow drill bit, and the drill bit is connected with the lower end of the outer core pipe; the lower end of the inner core pipe extendsto the bottom of the outer core pipe, and the inner core pipe is in clearance fit with the outer core pipe; and the rock core sample fidelity cabin comprises an inner coring cylinder, an outer coringcylinder and an energy accumulator, the outer coring cylinder sleeves the inner coring cylinder, the upper end of the inner coring cylinder communicates with a liquid nitrogen storage tank, the liquid nitrogen storage tank is located in the outer coring cylinder, the energy accumulator communicates with the outer coring cylinder, and the outer coring cylinder is provided with a flap valve. According to the rock sample in-situ fidelity coring system, the rock core is advantageously kept the state under the in-situ environment, the drilling speed can be increased, and the coring efficiency is improved.

Description

technical field [0001] The invention relates to the field of oil and gas field exploration, in particular to a rock sample in-situ fidelity coring system. Background technique [0002] In the process of oilfield exploration, cores are important data for discovering oil and gas layers and studying formations, oil source layers, oil reservoirs, cap rocks, structures, etc. Through observation and research on cores, we can directly understand the lithology and physical properties of underground rock formations And oil, gas, water features. After the oilfield is put into development, it is necessary to further study and understand the sedimentary characteristics of the oil layer, the physical properties, pore structure, wettability, relative permeability, lithofacies characteristics of the reservoir, the physical simulation of the oil layer and the water flooding law of the oil layer through the core; In the development stage and the water flooding characteristics of oil layers ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B25/00E21B25/08E21B25/10E21B10/02E21B10/60
CPCE21B25/00E21B25/08E21B25/10E21B10/02E21B10/605E21B2200/05
Inventor 谢和平高明忠陈领李存宝朱建波廖志毅李聪郭峻何志强
Owner SHENZHEN UNIV
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