Leakproof floating apparatus and method for fabricating said apparatus
AssigneeHalliburton Company
InventorsBobby L. Sullaway, Henry E. Rogers, Dick A. Murray
Life of this patent
Estimating the term…
Abstract
A floating apparatus for use in a casing string. The apparatus includes an outer sleeve having a check valve centrally positioned therein. A body portion, which may be comprised of high compressive strength cement, is affixed to the check valve and the housing. The body portion has an upper end and a lower end. An upper seal is disposed above the upper end of the body and sealingly engages the housing and the outer sleeve. A lower seal is disposed in the sleeve below the lower end of the body portion, and sealingly engages the valve housing and the outer sleeve, so that fluid flowing through the outer sleeve cannot communicate with the body portion.
Claims20
A floating apparatus for use in a well casing comprising:
- an outer sleeve adapted to be connected to said casing, said sleeve having an outer surface and an inner surface, wherein said inner surface defines a central flow passage;
- a check valve disposed in said outer sleeve, said check valve comprising a valve housing having a central opening communicated with said central flow passage;
- a body portion fixedly attached to said housing and said outer sleeve, wherein said body portion fills an annulus defined between said outer sleeve and said valve housing, said body portion having an upper and lower end;
- and
- sealing means for sealing said body portion, so that fluid flowing in said central flow passage cannot contact said body portion.
A method of fabricating substantially leakproof floating equipment comprising:
- providing an outer sleeve, said outer sleeve having an inner surface and an outer surface, said inner surface defining a central flow passage;
- radially centrally positioning a valve housing in said outer sleeve, thereby defining an annulus between said inner surface of said outer sleeve and said valve housing;
- filling said annulus between said outer sleeve and said valve housing with cement to form a cement body portion, thereby affixing said housing to said outer sleeve;
- and
- encapsulating said cement body portion, so that fluid flowing through said central flow passage is prevented from communicating with said cement body portion.
A floating apparatus for use in a well bore comprising:
- an outer sleeve having an upper end adapted to be connected to a casing string thereabove;
- a valve housing disposed in said outer sleeve, said valve housing and said outer sleeve having an annulus defined therebetween;
- a body portion affixed to said outer sleeve and said valve housing, said body portion having an upper end and a lower end;
- and
- an upper seal disposed in said sleeve, said upper seal being positioned at said upper end of said body portion and sealingly engaging said outer sleeve and said valve housing.
Dependencies are inferred from the claim text.