Patents Assigned to Stena Drilling Ltd.
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Patent number: 9347281Abstract: A triple activity drilling ship may be provided with two separate drilling centers, each including drilling apparatus. In addition, a trolley that is capable of supporting tubulars may be positioned between a first position within one of said drilling centers and a second position outside that drilling center. As a result, the trolley may be used to hold assembled tubulars while other activities are ongoing in one or more of the drilling centers.Type: GrantFiled: June 9, 2015Date of Patent: May 24, 2016Assignee: Stena Drilling Ltd.Inventor: Gavin Humphreys
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Patent number: 9222327Abstract: An independently operable disconnect device remotely disconnectable from an LMRP to reveal a riser profile compatible with a capping device connecter. A capping device including a capping device connector to be coupled to said riser profile. The capping device includes at least one blow-out preventer operable to stop the overflow of petroleum products from a well. Thus, a drilling marine riser may be fully disconnected from an LMRP in an emergency. Then the well may be subsequently capped.Type: GrantFiled: November 28, 2012Date of Patent: December 29, 2015Assignee: STENA DRILLING LTD.Inventor: Gavin Humphreys
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Patent number: 9067649Abstract: A drilling vessel may function both as an ice breaker and, if needed, as a drilling platform for drilling a relief well. The vessel may be provided with a mast that may be stowed when drilling operations are not being conducted.Type: GrantFiled: April 2, 2014Date of Patent: June 30, 2015Assignee: Stena Drilling Ltd.Inventor: Gavin Humphreys
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Patent number: 8925647Abstract: A triple activity drilling ship may be provided with two separate drilling centers, each including drilling apparatus. In addition, a trolley that is capable of supporting tubulars may be positioned between a first position within one of said drilling centers and a second position outside that drilling center. As a result, the trolley may be used to hold assembled tubulars while other activities are ongoing in one or more of the drilling centers.Type: GrantFiled: June 30, 2006Date of Patent: January 6, 2015Assignee: Stena Drilling Ltd.Inventor: Gavin Humphreys
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Publication number: 20140209004Abstract: A drilling vessel may function both as an ice breaker and, if needed, as a drilling platform for drilling a relief well. The vessel may be provided with a mast that may be stowed when drilling operations are not being conducted.Type: ApplicationFiled: April 2, 2014Publication date: July 31, 2014Applicant: Stena Drilling Ltd.Inventor: Gavin Humphreys
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Publication number: 20140190701Abstract: A subsea assembly suitable for subsea drilling and intervention operations includes a dual blowout preventer system having an upper blowout preventer located between a drill floor and a high pressure riser string, and a lower blowout preventer located below the riser string and above a wellhead. The dual blowout preventer system is adapted to enable advanced drilling and intervention operations such as managed pressure drilling, underbalanced drilling, dual gradient drilling, or through tubing rotary drilling, and slim hole drilling in an offshore deepwater environment.Type: ApplicationFiled: March 11, 2014Publication date: July 10, 2014Applicant: Stena Drilling Ltd.Inventor: Gavin Humphreys
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Publication number: 20140144646Abstract: An independently operable disconnect device remotely disconnectable from an LMRP to reveal a riser profile compatible with a capping device connecter. A capping device including a capping device connector to be coupled to said riser profile. The capping device includes at least one blow-out preventer operable to stop the overflow of petroleum products from a well. Thus, a drilling marine riser may be fully disconnected from an LMRP in an emergency. Then the well may be subsequently capped.Type: ApplicationFiled: November 28, 2012Publication date: May 29, 2014Applicant: STENA DRILLING LTD.Inventor: Gavin Humphreys
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Patent number: 8678094Abstract: An offshore platform may include a pair of trolleys. One trolley may be mounted on top of the platform and the other trolley may be suspended below the platform. Each trolley may be positioned on opposed sides of a moon pool in one embodiment of the present invention. The lower trolley may be used to hang off a riser and blowout preventer. The upper trolley may be utilized to hang off smaller diameter casing while larger diameter casing is being made up and positioned within the hole. As a result of the parallel operations made possible by the trolleys, drilling time may be reduced in some embodiments.Type: GrantFiled: June 1, 2005Date of Patent: March 25, 2014Assignee: Stena Drilling Ltd.Inventor: John Banks
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Patent number: 8176985Abstract: Production and drilling may be achieved by a system which uses a rotating head coupled to surface blowout preventer stack for fluid flow control. A casing connects these surface components to a subsea shutoff assembly with a pair of ram shear devices to cut off the string to the wellhead. Both the casing and an alternate line may be latched so that they may be released if necessary. The rotating head may include a rubber packer to prevent upward flow of drilling fluid and production hydrocarbons and, at the same time, provide rotation to the drill string. Managed pressure drilling or under balanced drilling may be used in some embodiments.Type: GrantFiled: September 3, 2009Date of Patent: May 15, 2012Assignee: Stena Drilling Ltd.Inventor: Gavin Humphreys
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Patent number: 8162063Abstract: Dual gradient drilling may be performed by anchoring drilling tubulars from a drilling ship on the seabed. The drilling tubulars may include an inline pump for pumping mud through another set of tubulars that actually drill the well. Then dual gradient drilling may be instituted by controlling the pressure by controlling the operation of the pump.Type: GrantFiled: September 3, 2010Date of Patent: April 24, 2012Assignee: Stena Drilling Ltd.Inventor: Gavin Humphreys
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Patent number: 7144048Abstract: A composite marine riser may be formed, in one embodiment, of a pair of threaded metallic sections having threaded external surfaces. The threaded external surfaces may taper from a larger to a smaller diameter. The composite material may be formed over the threaded external surfaces, which surfaces serve to transfer force from the metallic sections to the composite material.Type: GrantFiled: May 5, 2004Date of Patent: December 5, 2006Assignee: Stena Drilling Ltd.Inventor: Gavin Humphreys
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Patent number: 7032691Abstract: Underbalanced production and drilling may be achieved by a system which uses a rotating head coupled to surface blowout preventer stack for fluid flow control. A casing connects these surface components to a subsea shutoff assembly with a pair of ram shear devices to cut off the string to the wellhead. Both the casing and an alternate line may be latched so that they may be released if necessary. The alternate line may provide fluid from the surface to the subsea shutoff assembly for purposes of varying the density of the returning mud. The rotating head may include a rubber packer to prevent upward flow of drilling fluid and production hydrocarbons and, at the same time, provide rotation to the drill string.Type: GrantFiled: October 30, 2003Date of Patent: April 25, 2006Assignee: Stena Drilling Ltd.Inventor: Gavin Humphreys