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A self-compensating in-situ drilling coring and testing device

A testing device and self-compensating technology, applied in the direction of extraction of undisturbed cores, earthwork drilling, wellbore/well components, etc., can solve problems such as staying in conceptualization, achieve fidelity, save energy, save production and maintenance costs Effect

Active Publication Date: 2021-12-17
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, a lot of scientific research has been carried out in China on the topic of downhole coring, but many of them are only in the conceptual stage and need to be continuously researched and explored

Method used

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  • A self-compensating in-situ drilling coring and testing device
  • A self-compensating in-situ drilling coring and testing device
  • A self-compensating in-situ drilling coring and testing device

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Embodiment

[0044] refer to figure 1 As shown, a self-compensating in-situ drilling coring and testing device includes a safety upper joint 1, a power supply base 2, a core control base 3, a first centering joint 4, and a fixed connection from top to bottom. Coring inner cylinder 9, coring outer cylinder 11, second centering joint 14, core measurement and control base 18, downhole coring bit 19; said core control base 3 is provided with a pressure temperature control device; correspondingly, the core measurement and control The inside of the base 18 is provided with a pressure and temperature measuring device and a ball valve opening and closing control device; the coring inner cylinder 9 is sleeved inside the coring outer cylinder 11, and the The upper section 10 of the heat preservation device and the lower section 13 of the heat preservation device are installed between the outer cylinders 11; a rock core deformation testing device 12 is arranged between the upper section 10 of the hea...

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PUM

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Abstract

The invention discloses a self-compensating in-situ drilling coring and testing device, which comprises a safety upper joint, a power supply base, a core control base, a first centering joint, a coring inner cylinder, Coring outer cylinder, second centering joint, core measurement and control base, downhole coring bit; the inside of the core control base is equipped with a pressure and temperature control device; correspondingly, the inside of the core measurement and control base is equipped with a pressure and temperature measurement device and ball valve opening and closing control device; and between the coring inner cylinder and the coring outer cylinder, the upper section of the insulation device and the lower section of the insulation device are installed; a rock core deformation testing device is arranged between the upper section of the insulation device and the lower section of the insulation device; Core pressure compensation device. The device of the invention can not only take out rock core samples that can more truly reflect the rock mechanical properties and natural gas hydrate components in the in-situ environment, but also realize the self-compensating principle of measuring while drilling, measuring while taking, and real-time fidelity. Bit drilling and coring.

Description

technical field [0001] The invention relates to the technical field of oil exploration and development petroleum engineering drilling and coring, and more specifically relates to a self-compensating in-situ drilling and coring and testing device. Background technique [0002] The study of gas hydrate sediment cores is an essential basic data required for petroleum resource development and engineering geological evaluation research. Conventional core drilling tool assemblies only have simple coring tools, centralizers, and heavy drill pipes, and there are no pressure-holding measures, or the pressure-holding time of sealed coring tools is limited. When the core is recovered from the downhole to the wellhead, due to temperature Due to changes in environmental conditions such as pressure and pressure, the internal structure of the core sample will change, so that it cannot reflect the true nature of the natural gas hydrate in the actual formation, and even a complete core sampl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B25/08E21B49/02
CPCE21B25/08E21B49/02
Inventor 刘合王素玲程天才李金波温鹏云任智慧
Owner NORTHEAST GASOLINEEUM UNIV
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