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Downhole Intervention

a technology for downholes and wells, applied in special purpose vessels, boreholes/well accessories, sealing/packing, etc., can solve the problems of large, high cost, and often inability to economically justify the use of multi-purpose vessels

Inactive Publication Date: 2012-05-31
MY TECH L LC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention is about a new way to design, install, use, recover, and reuse a Self Supporting Riser (SSR) for wells that are not under a platform. The SSR uses standardized joints that can be recovered, potentially warehoused, and recombined in different configurations for different purposes or locations. The invention emphasizes methods and apparatus that use relatively small vessels subject to high motions in the use and recovery of the SSR, especially the methods, apparatus, and vessel for downhole intervention and work over through a SSR. The technical effects of the invention include improved efficiency, flexibility, and cost-effectiveness in the design, installation, and use of the SSR for wells."

Problems solved by technology

A MODU is a large, high cost, multipurpose vessel which frequently can not be economically justified, given the limited additional product that can be recovered from a partially depleted reservoir.

Method used

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Examples

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Embodiment Construction

[0029]A Self-Supporting Riser (SSR) of the present invention is readily configured to provide downhole intervention in a well. The vessels used for installation or recovery and intervention are small vessels.

[0030]The subsea wells of specific interest for the present invention are those that have been drilled off-shore in water depths of approximately 500 to 10,000 feet and are not located under a host facility. Thus, the SSR of the present invention is a substantial structure. The SSR extends up from the seafloor with the top of the SSR near but below the water surface and typically below the wave zone and ship traffic. The modular components of the present invention can be assembled into unique SSR configurations and installed to meet the requirements of depth, parameters such as current found at the location and specific application needs, and to fit a particular existing well head or tree. The hydrocarbon production equipment to which the SSR is connected may be sea floor archit...

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Abstract

The present invention is directed to novel methods and apparatus for the design, installation, use, recovery, and reuse of a Self Supporting Riser (SSR) for wells that are not under a platform. The SSR of the present invention uses standardized joints that can be recovered, potentially warehoused, and recombined in different configurations for different purposes or locations. Emphasis is on methods and apparatus that use relatively small vessels subject to high motions in the use and recovery of the SSR, especially the methods, apparatus and vessel for downhole intervention and work over through a SSR.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation-in-part application of U.S. Ser. No. 12 / 714,919 filed Mar. 1, 2010 entitled “Riser Technology” and claims benefit of U.S. provisional application Ser. Nos. 61 / 225,601, filed Jul. 15, 2009; 61 / 232,551, filed Aug. 10, 2009; 61 / 252,815, filed Oct. 19, 2009; 61 / 253,230, filed Oct. 20, 2009; 61 / 253,200, filed Oct. 20, 2009, all of which are incorporated herein by reference.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT[0002]Not ApplicableFIELD OF INVENTION [0003]The present invention is directed to a practical, low cost modular, reusable tubular / Self Supporting Riser (SSR) and provisions for interfacing a vessel subject to high motions to the SSR. The SSR can be easily installed and recovered in a wide range of water depths and in areas of high current. The installed SSR can be left untended. Moreover, the SSR can be configured for workover of a well through the SSR using coiled tubing, joint...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E21B43/01B63B35/44
CPCB63B35/44B66C13/02E21B19/002Y10T29/49826E21B19/006E21B19/22E21B19/004B63B2003/147
Inventor YEMINGTON, CHARLES R.
Owner MY TECH L LC
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