Quaternary system rotation rope coring device for balancing wave heave

A rope coring and wave technology, which is applied in the direction of undisturbed core extraction, earthwork drilling and mining, etc., can solve the problems of coring failure, core blocking, core grinding, etc., reduce disturbance, avoid up and down movement, and improve coring success rate effect

Active Publication Date: 2016-10-05
中石化石油工程技术服务有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conventional wireline corer while drilling does not have heave compensation function. Therefore, during the drilling and coring process, the core tube moves up and down together with the outer tube assembly, causing problems of core grinding and plugging, resulting in core failure

Method used

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  • Quaternary system rotation rope coring device for balancing wave heave
  • Quaternary system rotation rope coring device for balancing wave heave
  • Quaternary system rotation rope coring device for balancing wave heave

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Embodiment Construction

[0091] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0092] Please refer to attached picture. It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Limiting conditions, so there is no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. The disclosed technical content must be within the scope covered. At t...

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PUM

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Abstract

The invention provides a quaternary system rotation rope coring device for balancing wave heave, which relates to the technical field of drilling. The quaternary system rotation rope coring device includes an outer pipe assembly, an inner pipe assembly arranged in the outer pipe assembly and a seat ring arranged on the inner wall of the outer pipe assembly. The inner pipe assembly includes a hanging mechanism, a wave heave balancing mechanism, an adjustment single action mechanism and a rock core pipe, which are successively connected from top to bottom; the wave heave balancing mechanism includes an alarm plug short connection piece, a hydraulic cylinder and a stopper, a piston assembly, a hollow piston rod and a water division joint, wherein the alarm plug short connection piece, the hydraulic cylinder and the stopper are successively connected from top to bottom, and the piston assembly, the hollow piston rod and the water division joint are successively connected from top to bottom; when the piston assembly reaches an upper extreme position, the water division joint contacts the stopper, and a plug body stretches into a slide valve water inlet channel; and when the piston assembly reaches a lower extreme position, the piston assembly contacts the stopper. The quaternary system rotation rope coring device can be applied to a drilling coring process, when the outer pipe assembly heaves with a ship, a tool bit tightly compresses a hole bottom all the time, and the situation that the rock core pipe heaves with the outer pipe assembly can be effectively avoided.

Description

technical field [0001] The invention relates to the technical field of drilling, in particular to a quaternary rotary rope corer for balancing wave heave. Background technique [0002] Offshore engineering drilling and coring technology is an important means of geological exploration, mining development, water resources, oil and gas exploration, basic engineering and environmental science engineering. At present, the country pays more and more attention to marine exploration. Wave heave has always been a difficult problem in ocean drilling and coring. There are two methods of drilling and coring to balance wave heave, including active compensation and passive compensation. The active compensation method is expensive. Considering the cost of geological drilling in the shallow sea area of ​​my country’s continental shelf, the drilling ship generally adopts the passive compensation method. The passive compensation is not sensitive to wave heave, and the effect is not ideal. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B25/00E21B25/10
Inventor 郑荣耀卢秋平张异彪何彬李斌
Owner 中石化石油工程技术服务有限公司
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