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US 2017/0321510 A1Published application
Wellhead system and joints
OwnerKarl-Willie HOELinventor
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Abstract
The present invention relates to an upper subsea wellhead surface joint, a lower subsea wellhead surface joint, an upper subsea wellhead conductor joint, and a lower subsea wellhead conductor joint. According to the present invention, these are machined from a single piece of forged steel material and corrosion protected by means of an electrolytic or other process.
Claims24
An upper subsea wellhead surface joint comprising:
- a housing at an upper end;
- a connection organ at a lower end;
- and
- internal and external surfaces;
- the housing comprising sealing surfaces;
- wherein the upper subsea wellhead surface joint is machined from a single piece of forged steel material;
- and
- wherein the sealing surfaces are corrosion protected.
5 more elements
A lower subsea wellhead surface joint, comprising:
- a first connection organ at an upper end;
- a second connection organ at a lower end;
- and
- internal and external surfaces;
- wherein the lower subsea wellhead surface joint is machined from a single piece of forged steel material;
- and
- wherein the internal and external surfaces of the lower subsea wellhead surface joint are corrosion protected.
4 more elements
An upper subsea wellhead conductor joint comprising:
- a housing at an upper end;
- a connection organ at a lower end;
- and
- internal and external surfaces;
- wherein the upper subsea wellhead conductor joint is machined from a single piece of forged steel material;
- and
- wherein the internal and external surfaces are corrosion protected.
4 more elements
A lower subsea wellhead conductor joint, comprising:
- a first connection organ at an upper end;
- a second connection organ at an lower end;
- and
- internal and external surfaces;
- wherein the lower subsea wellhead conductor joint is machined from a single piece of forged steel material;
- and
- wherein the internal and external surfaces of the lower subsea wellhead conductor joint are corrosion protected.
4 more elements
Dependencies are inferred from the claim text.