Method and apparatus for managing variable density drilling mud

A drilling mud and variable density technology, which is used in earth-moving drilling, flushing wellbore, wellbore/well components, etc., can solve the problems of circulating fluid leakage, drilling mud leakage and drilling mud loss, etc.

Inactive Publication Date: 2009-03-25
EXXONMOBIL UPSTREAM RES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Also, if the density of the drilling mud is higher than FG, the drilling mud may leak into the formation
Leaks can resul...

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  • Method and apparatus for managing variable density drilling mud
  • Method and apparatus for managing variable density drilling mud
  • Method and apparatus for managing variable density drilling mud

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Embodiment Construction

[0027] [0025] In the detailed description section below, specific embodiments of the present invention are described in connection with preferred embodiments. However, to the extent the following description is specific to a particular embodiment or use of the invention, it is intended for purposes of illustration only, and to provide a description of exemplary embodiments only. Therefore, the invention is not limited to the specific embodiments described below, but on the contrary, it includes all alternatives, modifications and equivalents falling within the true spirit and scope of the appended claims.

[0028] [0026] The present technology relates to methods and apparatus for manipulating compressible particles for use with drilling fluids to provide variable density drilling muds for drilling operations in wells. Because compressible particles can include spheroids, spheroids, etc., methods and apparatus for manipulating these compressible particles during drilling operat...

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Abstract

A method and system for drilling a wellbore is described. The syste includes a wellbore with a variable density drilling mud, drilling pipe, a bottom hol assembly disposed in the wellbore and a drilling mud processing unit in flui communication with the wellbore. The variable density drilling mud has compressibl particles and drilling fluid. The bottom hole assembly is coupled to the drilling pipe while the drilling mud processing unit is configured to separate the compressibl particles from the variable density drilling mud. The compressible particles in thi embodiment may include compressible hollow objects filled with pressurized gas an configured to maintain the mud weight between the fracture pressure gradient an the pore pressure gradient. In addition, the system and method may also manag the use of compressible particles having different characteristics, such as size, during the drilling operations.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 60 / 779,679, filed March 6, 2006. technical field [0003] [0001] The present invention relates generally to apparatus and methods for use in wellbores and in connection with drilling operations to produce hydrocarbons. More specifically, the present invention relates to wellbore devices and methods for manipulating compressible particles in variable density drilling muds. Background technique [0004] [0002] This section is intended to introduce various aspects of art, which may be related to the exemplary embodiments of this invention. This discussion is considered helpful in providing a framework for facilitating a better understanding of specific aspects of the invention. Accordingly, it should be understood that this section should be read in this light, and not necessarily as an introduction to prior art. [0005] [0003] The production of hyd...

Claims

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Application Information

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IPC IPC(8): E21B21/01E21B21/06E21B21/08
CPCE21B21/002E21B21/062E21B21/066E21B21/00Y10S507/906
Inventor P·M·斯皮克尔P·B·昂切夫R·古普塔R·波利佐蒂B·卡斯特森D·G·佩弗尔N·波库特洛维茨
Owner EXXONMOBIL UPSTREAM RES CO
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