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US 2008/0185156 A1Published application
Wellhead system and connector for wellheads
AssigneeStream-Flo U.S.A.
InventorsDoyle W. Rodgers, Randy P. Nichols, Henry Lang
Life of this patent
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Abstract
A wellhead system, connector, and method of assembling a wellhead system utilizes a connector which includes a set of left-hand threads and a set of right-hand threads.
Claims30
A wellhead system, comprising:
- a tubing head having an upper end, a lower end, a bore extending from the upper end to the lower end of the tubing head, and a first set of threads disposed on an outer surface of the tubing head;
- a tubing hanger disposed in the bore of the tubing head;
- at least one casing head having an upper end, a lower end, a bore extending from the upper end to the lower end of the casing head, and a second set of threads disposed on an outer surface of the at least one casing head;
- a casing hanger disposed in the bore of the at least one casing head;
- and
- at least one connector which releasably connects the tubing head to the at least one casing head, the at least one connector including a member having an interior surface which threadedly engages at least a portion of the first and second sets of threads on the tubing head and the at least one casing head, the interior surface of the at least one connector including a set of left-hand threads and a set of right-hand threads.
3 more elements
A method for assembling a wellhead system, comprising:
- providing a tubing head having an upper end, a lower end, a bore extending from the upper end to the lower end of the tubing head, and a first set of threads disposed on an outer surface of the tubing head;
- providing at least one casing head having an upper end, a lower end, a bore extending from the upper end to the lower end of the casing head, and a second set of threads disposed on an outer surface of the at least one casing head;
- disposing a casing hanger in the bore of the at least one casing head;
- providing at least one connector including a member having an interior surface having two sets of threads, wherein one set of threads is a set of left-hand threads and the other set of threads is a set of right-hand threads;
- and
- releasably connecting the tubing head to the at least one casing head by threadedly engaging at least a portion of the first set of threads on the tubing head with one of the sets of threads on the at least one connector and threadedly engaging at least a portion of the second set of threads on the at least one casing head with the other set of threads on the at least one connector.
3 more elements
A connector for releasably securing two tubular shaped oilfield wellhead components which each have a substantially circular, cross-sectional outer configuration, each of the two wellhead components having an outer well surface with a set of threads disposed on each of the outer wall surfaces, comprising:
- a member having an interior surface having a substantially circular cross-sectional configuration, adapted to threadedly engage at least a portion of each of the set of threads on the two wellhead components;
- and
- a set of right-hand threads and a set of left-hand threads are disposed upon the interior surface of the member.
Dependencies are inferred from the claim text.