Apparatus for obtaining high quality formation fluid samples

a technology of formation fluid and apparatus, which is applied in the direction of survey, drilling/well accessories, insulation, etc., can solve the problems of significant cost and time, inability to preserve the temperature of formation fluid, and relatively complex operation to remove formation fluid samples, so as to improve the economic viability and more accurate determination of formation properties

Inactive Publication Date: 2005-02-10
PATHFINDER ENERGY SERVICES
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  • Abstract
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  • Application Information

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Benefits of technology

[0010] Exemplary embodiments of the present invention may advantageously provide several technical advantages. For example, sampling tool embodiments according to this invention may advantageously provide for improved sampling of formation fluid from, for example, deep wells. In particular, embodiments of this invention are configured with the intent to try to maintain, for as long as possible, the fluid at about the same temperature and pressure conditions as found in the formation. A tool according to this invention, in combination wi...

Problems solved by technology

While the Berger and Schultz apparatuses apparently permit samples to be collected relatively early in the life of a well, without retrieval of the drill string, they include no capability to preserve the temperature of the formation fluid.
Further, it is a relatively complex operation to remove the formation fl...

Method used

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  • Apparatus for obtaining high quality formation fluid samples
  • Apparatus for obtaining high quality formation fluid samples
  • Apparatus for obtaining high quality formation fluid samples

Examples

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Embodiment Construction

[0019] Referring now to FIG. 1, one exemplary embodiment of sampling module 100 according to this invention is schematically illustrated in use in an offshore oil or gas drilling assembly, generally denoted 10. A semisubmersible drilling platform 12 is positioned over an oil or gas formation 14 disposed below the sea floor 16. A subsea conduit 18 extends from deck 20 of platform 12 to a wellhead installation 22. The platform may include a derrick 26 and a hoisting apparatus 28 for raising and lowering the drill string 30 including drill bit 32, sampling module 100, and formation tester 200. Drill string 30 may further include a downhole drill motor, a mud pulse telemetry system, and one or more sensors, such as a nuclear logging instrument, for sensing downhole characteristics of the well, bit, and reservoir.

[0020] During a drilling, testing, and sampling operation, drill bit 32 is rotated on drill string 30 to create a well bore 40. Shortly after the drill bit 32 intersects the fo...

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Abstract

A well fluid sampling tool is provided. The sampling tool includes at least one insulated sample chamber mounted in a tool collar. The tool collar may be coupled with a drill string such that, when the tool collar is deployed in a well bore, selected sample chambers may receive a fluid sample from outside the drill string without removing the drill string from the well bore (e.g., during measurement while drilling or logging while drilling operations). A heating module in thermal communication with at least one of the sample chambers is disposed to selectively heat the sample chambers in thermal communication therewith. The sampling tool may be particularly useful for acquiring and preserving substantially pristine formation fluid samples.

Description

RELATED APPLICATIONS [0001] This application claims the benefit of U.S. Provisional Application Ser. No. 60 / 492,483 entitled Apparatus for Obtaining High Quality Formation Fluid Samples, filed Aug. 4, 2003.FIELD OF THE INVENTION [0002] The present invention relates generally to the drilling of oil and gas wells, and more specifically, to a formation fluid sampling tool and method of use for acquiring and preserving substantially pristine formation fluid samples. BACKGROUND OF THE INVENTION [0003] The commercial development of hydrocarbon (e.g., oil and natural gas) fields requires significant capital investment. Thus it is generally desirable to have as much information as possible pertaining to the contents of a hydrocarbon reservoir and / or geological formation in order to determine its commercial viability. There have been significant advances in measurement while drilling and logging while drilling technology in recent years (hereafter referred to as MWD and LWD, respectively). T...

Claims

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Application Information

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IPC IPC(8): E21B49/08
CPCE21B49/081E21B49/08
Inventor MOODY, MICHAEL J.
Owner PATHFINDER ENERGY SERVICES
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