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Double hook and double spear rope feeding and fishing device for pressure maintaining and coring and using method thereof

A fishing device and coring technology, which is applied in the direction of undisturbed core extraction, earthwork drilling, wellbore/well components, etc., can solve problems such as affecting coring efficiency, low coring success rate, and coring failure, etc., to achieve Convenient for coring, hooking and unhooking methods are simple and convenient, and have a wide range of applications

Pending Publication Date: 2019-09-06
GUANGZHOU MARINE GEOLOGICAL SURVEY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Gas hydrate is affected by its location in the harsh and inaccessible polar and deep-sea marine environments, but also because when it is brought to the surface, it rapidly decomposes into its two components, liquid water and methane gas. , usually the success rate of coring is not high, and even lead to the failure of coring, which also indirectly affects the efficiency of coring. Therefore, in order to ensure the success of coring, it is necessary to use the pressure-holding method for coring operations

Method used

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  • Double hook and double spear rope feeding and fishing device for pressure maintaining and coring and using method thereof
  • Double hook and double spear rope feeding and fishing device for pressure maintaining and coring and using method thereof
  • Double hook and double spear rope feeding and fishing device for pressure maintaining and coring and using method thereof

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Embodiment Construction

[0037] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0038] Such as Figure 1 to Figure 4 , Figure 11 to Figure 12 As shown, a double-hook and double-spear rope feeding and fishing device for pressure-holding coring of the present invention includes a feeding tool part, a fishing tool part and a salvaged part, and the salvaged part and the feeding tool part or fishing tool Partially detachable connections.

[0039] The feeding tool part includes a first wire rope 21, a first wire rope ring 221, a first bearing 222, a first nut 223, a first bearing sleeve 224, a slide hammer 225, a limit joint 226 and a connecting rod 227, and one end of the first wire rope 21 It is fixedly connected with the first steel wire rope ring 22...

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Abstract

The invention relates to the technical field of drilling coring, in particular to a double hook and double spear rope feeding and fishing device for pressure maintaining and coring and a using methodthereof. The double hook and double spear rope feeding and fishing device for pressure maintaining and coring which can realize different movement of a double pipe coring device through a double hookand double spear control connection mode is provided, the double hook and double spear rope feeding and fishing device includes a feeding tool part, a fishing tool part and a being fished part, and the being fished part is detachably connected with the feeding tool part or the fishing tool part; and the using method of the double hook and double spear rope feeding and fishing device for pressure maintaining and coring which can realize different movement of the double pipe coring device through the double hook and double spear control connection mode is provided, and the using method includesthe following steps that (1) the being fished part is put; (2) the feeding tool part is detached from the being fished part; (3) the feeding tool part is recycled; (4) rotary coring is conducted; (5)the fishing tool part is combined with the being fished part; and (6) the being fished part is gotten back.

Description

technical field [0001] The invention relates to the technical field of drilling and coring, in particular to a double-hook and double-spear rope feeding and fishing device for pressure-maintaining coring and its application method. Background technique [0002] Obtaining natural gas hydrate samples through offshore drilling is a commonly used technology at present, and the double-tube coring device is a commonly used coring technology, and it is also used in the field of pressure-holding coring. Gas hydrate is affected by its location in the harsh and inaccessible polar and deep-sea marine environments, but also because when it is brought to the surface, it rapidly decomposes into its two components, liquid water and methane gas. , usually the success rate of coring is not high, and even leads to the failure of coring, which also indirectly affects the efficiency of coring. Therefore, in order to ensure the success of coring, it is necessary to adopt the method of maintainin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B23/00E21B31/20E21B25/00
CPCE21B23/00E21B31/20E21B25/00
Inventor 叶建良卢秋平谢文卫寇贝贝李博王静丽匡增桂张熙
Owner GUANGZHOU MARINE GEOLOGICAL SURVEY
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