Drilling fluid density online control device

A drilling fluid density and control device technology, which is applied in the field of oil drilling, can solve the problems of multiple casing layers and narrow density windows, etc., and achieve the effects of reducing drilling costs, precise control, and reducing the probability of dangerous accidents

Active Publication Date: 2019-06-14
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
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Problems solved by technology

[0006] The purpose of the present invention is to provide an on-line control device for drilling fluid density, through which deep water variable gradient drilling can be realized, which solves the problem of too many casing layers in single gradient drilling, and also solves the problem of double gradient drilling. The problem of large-scale equipment is needed in the middle, the cost of drilling is reduced, and the problem of narrow density window in deepwater drilling is finally solved

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  • Drilling fluid density online control device
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  • Drilling fluid density online control device

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Embodiment Construction

[0044] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0045] Such as Figure 1 to Figure 4 As shown, the present invention provides a drilling fluid density on-line control device 100. During use, the drilling fluid density on-line control device 100 is connected in series on the hollow drill pipe 9 (the prior art); the drilling fluid density on-line control device 100 includes an external Barrel 1 and a plurality of hollow spheres 2 (low-density light medium) whose density is lower than that of the drilling fluid. The plurality of hollow spheres 2 are used for the ball throwing operation when adjusting the density of the drilling fluid. The size and specification of the hollow spheres 2 are determined according to the actual application. When the hollow sphere 2 is filled in the an...

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Abstract

Abstract The present invention relates to a drilling fluid density online regulation device, comprising an outer barrel and a plurality of hollow spheres, a central hole is provided in the outer barrel, a layered filtering structure is sleeved in the central hole, the layered filtering structure comprises a filter cartridge structure slidable and capable of layer-based filtrations of the hollow spheres, a plurality of fluid discharge through-holes are provided on a sidewall of the outer barrel, with a hole diameter larger than an outer diameter of the hollow sphere. Deep-water variable-gradient drilling can be realized by the device, which well solves the problem that excessive layers of casings are set in the single-gradient drilling, and the problem that a large equipment is required in the dual-gradient drilling, thereby reducing the drilling cost, and solving the problem of the narrow-density window in deep-water drilling. 1 / l 3-0-33-13 1- 1

Description

technical field [0001] The invention relates to the technical field of petroleum drilling, in particular to an online regulating device for drilling fluid density. Background technique [0002] In recent years, 50% of the world's major oil and gas exploration and development has come from the ocean, mainly in deep water areas. Deep water areas have become an important replacement area for oil and gas exploration and development in the world. Deepwater oil and gas exploration and development are becoming the main growth point of world oil and the frontier of technological innovation, and deepwater will become the main battlefield for oil and gas resources in the future. [0003] Drilling is a key link in deepwater oil and gas exploration and development, and deepwater drilling faces many challenges and risks: (1) Challenges brought about by water depth. With the increase of water depth, higher requirements are put forward for drilling tools, drilling fluid, riser, platform b...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B21/00E21B21/08
CPCE21B21/00E21B21/08
Inventor 李军黄涛张辉
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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