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US 6,640,897 B1Granted
Method and apparatus for through tubing gravel packing, cleaning and lifting
AssigneeBJ Services Company
InventorsJohn G. Misselbrook, Richard A. Altman
Life of this patent
Estimating the term…
Abstract
Method and Apparatus for gravel packing, cleaning and lifting wells, including through tubing methods, circulating well fluids through a coiled tubing string having a leak protection barrier operable for at least a portion of the string passing above a wellhead and employing a circulating and release sub.
Claims28
A method for gravel packing a well, comprising:
- running a coiled tubing string downhole;
- injecting a gravel pack slurry down a well-coiled tubing annulus;
- and
- reverse circulating fluid up the coiled tubing string, including past a wellhead.
1 more element
A method for gravel packing a well, comprising:
- running a coiled tubing string downhole;
- injecting a gravel pack slurry down a well-coiled tubing annulus;
- reverse circulating fluid up the coiled tubing string, including past a wellhead;
- and
- running the coiled tubing string having a leak protection barrier operable for at least a portion of the string above the wellhead.
2 more elements
A method for well enhancement comprising:
- running a coiled tubing string down production tubing, the string having a leak protection barrier operable for at least a portion of the string above a wellhead;
- circulating fluid down a production tubing -coiled tubing annulus;
- and
- reverse circulating fluid and particulate matter up the coiled tubing string, including past the wellhead.
1 more element
A method for lifting fluid from a well, comprising:
- creating a production tubing-coiled tubing string annulus in the well;
- circulating natural gas down the annulus;
- producing well fluid up the coiled tubing string;
- and
- providing a protective barrier for the coiled tubing string above a wellhead.
2 more elements
Gravel pack apparatus, comprising:
- coiled tubing;
- a screen assembly;
- and
- a circulating and release sub attached, directly or indirectly, between the coiled tubing and the screen assembly, the sub having
- at least one port, adjustable between open and closed, structured to permit fluid circulation between outside and inside the coiled tubing string;
- and
- a release mechanism, adjustable to latch and to detach the sub from the screen assembly.
4 more elements
A method for lifting fluid from a well, comprising:
- creating a production tubing-coiled tubing string annulus in the well;
- circulating natural gas down the coiled tubing string;
- producing well fluid up the annulus;
- and
- providing a protective barrier for the coiled tubing string above a wellhead.
2 more elements
Dependencies are inferred from the claim text.