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Slim borehole wall corer

A coring and wellbore technology, which is used in the extraction of undisturbed core devices, earthwork drilling, etc., to ensure the acquisition rate of the coring device, avoid contact, and ensure the harvest rate.

Active Publication Date: 2017-12-15
姚娜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention provides a slim hole sidewall coring device to solve the problems of rapid acquisition of slim hole formation cores, use safety, and coring quality for wells less than 6 inches

Method used

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Embodiment Construction

[0028] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0029] At present, there is no special sidewall coring device for wells smaller than 6 inches. Using the existing drilling coring, the process is cumbersome, long time, labor-intensive, and high cost; using the existing sidewall coring device, the coring barrel is exposed , poor safety performance; and for irregular wells or inclined wells, when using a coring device with an additional guiding rubber cone, it is easy to generate vibrations, destroy the stability of the electronic circuit, and easily break down. The invention provides a A slimhole borehole wall coring device capable of solving the above-mentioned problems.

[0030] The slimhole sidewall coring device includes a rotary sub, a...

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Abstract

The invention discloses a slim hole borehole wall coring device, which is characterized in that it includes a rotating sub-joint, a circuit control sub-joint, a coring assembly and a guiding assembly, wherein one end of the circuit control sub-joint passes through the The swivel joint is connected with the horse tap, and the other end is connected with the coring assembly, and the other end of the coring assembly is connected with the guiding assembly, and the guiding assembly includes guide knuckles with upward, resetting, reciprocating movement and preventing The guide joint is an orientation joint that moves left and right and can prevent the corer from rotating axially. One end of the guide joint is connected to the coring assembly, and the other end is connected to the guide joint. The slim hole borehole wall coring device has the function of internal orientation and guidance, which ensures that the launching direction of the coring barrel is always upward, which can effectively reduce the frictional resistance caused by the irregular well wall, and guide the coring device to run along the wellbore trajectory, which can effectively It can reduce the vibration generated during the operation of the coring device and the launching process of the coring barrel, which can prolong the service life of the equipment and ensure the core obtaining rate.

Description

technical field [0001] The invention belongs to the field of oil well wall coring, and in particular relates to a slim hole wall coring device. Background technique [0002] The borehole wall coring is determined by the logging data to determine the formation depth of the core to be taken, and the corer is lowered downhole with a cable. After reaching the predetermined depth, the downhole corer is controlled by the ground instrument to obtain the core from the borehole wall. The core is the intuitive primary data to obtain the formation lithology, physical property and oil-bearing property. Using this intuitive geological data can make a correct evaluation of the oil and gas layers in the exploration area, solve suspicious formations in the electrical logging data, and use borehole wall coring to reduce drilling coring, increase drilling speed, and reduce drilling costs. [0003] With the continuous deepening of science and technology in oilfield exploration and development...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B25/00
Inventor 姚娜
Owner 姚娜
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