Pressurizing device for fully hydraulically driven downhole pipe string and its propulsion method

A technology of downhole pipe strings and pressurization devices, which is applied in drilling equipment and methods, rotary drilling rigs, buildings, etc., can solve problems such as difficult to meet complex field conditions and unsatisfactory effects, and achieve improved oil field production capacity and guaranteed efficiency Effect

Active Publication Date: 2017-04-05
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hydraulic pressurizers are usually used for WOB loading of coiled tubing drilling, but the effect is not ideal and it is difficult to meet the needs of complex field conditions

Method used

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  • Pressurizing device for fully hydraulically driven downhole pipe string and its propulsion method
  • Pressurizing device for fully hydraulically driven downhole pipe string and its propulsion method
  • Pressurizing device for fully hydraulically driven downhole pipe string and its propulsion method

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Embodiment Construction

[0060] The above and other technical features and advantages of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them.

[0061] see figure 1 As shown, a fully hydraulically driven downhole pipe string pressurization device of the present invention includes a second actuating mechanism 3 , a hydraulic control center 2 and a first actuating mechanism 1 connected in sequence.

[0062] see figure 2 As shown, the first actuating mechanism 1 and the second actuating mechanism 3 both include an anchor assembly, a hydraulic cylinder 16 and a push piston 19 arranged in sequence; the push piston 19 is fixedly connected to a center pipe 11, and the center pipe 11 runs through the anchor assembly and the hydraulic Cylinder 16, in this embodiment, the central pipe 11 protrudes from the anchor assembly and the hydrau...

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PUM

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Abstract

The invention discloses a pressure device capable of full-hydraulically driving an underground pipe column and a propelling method thereof. The pressure device comprises a second moving mechanism, a hydraulic control center and a first moving mechanism which are connected in turn; each of the first and second moving mechanisms comprises an anchoring component, a hydraulic cylinder and a propelling piston, the propelling piston is used for fixing a center pipe; the propelling piston is slid in the hydraulic cylinder, one end of the anchoring component is slidably and airtightly placed in the hydraulic cylinder and the exposed part thereof is telescopic along the radial direction; an anchoring end annular cavity is formed between the anchoring component and the propelling piston, and a propelling end annular cavity is formed between the propelling piston and a propelling end cover; the anchoring end annular cavity and the propelling end annular cavity of the second moving mechanism are respectively connected with the anchoring end annular cavity and the propelling end annular cavity of the first moving mechanism; the extending and retracting of the anchoring components of the first and second moving mechanisms are respectively and successively controlled by the oil-feeding and pressure relief of the anchoring end annular cavity; and the hydraulic control center drives the propelling piston to be moved to one side of the propelling end cover, so that the pipe column is continuously propelled downwards.

Description

technical field [0001] The invention relates to the technical field of oil and gas drilling, in particular to a fully hydraulic pressurizing tool capable of applying thrust to a downhole pipe string, and a method for providing thrust for the downhole pipe string to realize loading of drill pressure and assisting in running the pipe string. Background technique [0002] As the exploration and development of oil and gas resources expands toward deeper and more complex formations, special well types such as horizontal wells and extended-reach wells are more and more widely used. In the mature oilfields in the later stage of development, casing window sidetracking or open hole sidetracking horizontal wells are important means to tap potential productivity. [0003] During drilling, the weight on the drill bit is generally loaded by the weight of the drill string. However, in horizontal wells and extended-reach wells, since most of the drill string adheres to the well wall, ther...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B19/08
CPCE21B19/08
Inventor 侯福祥马汝涛彭嵩徐丙贵
Owner BC P INC CHINA NAT PETROLEUM CORP
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