Deep water drilling with casing
First Claim
1. A method of lining a wellbore, comprising:
- positioning a first casing having a first wellhead in the wellbore;
providing a drilling assembly having;
a second casing having a second wellhead, wherein the second wellhead is adapted to seat in the first wellhead;
a conveying member having a diameter less than the second casing;
a tubular adapter for coupling the conveying member to the second casing, wherein the tubular adapter is adapted to transfer torque from the conveying member to the second casing; and
a drilling member disposed at a lower end of the second casing;
lowering the drilling assembly into the first casing;
coupling the second casing to the first casing; and
seating the second wellhead in the first wellhead.
2 Assignments
0 Petitions
Accused Products
Abstract
Methods and apparatus are provided to place a conductor pipe and a casing in a subsea environment. In one embodiment, a conductor pipe is jetted or drilled into the subsea floor. Thereafter, a casing drilling assembly comprising a drill casing and a drilling assembly is connected to the drill pipe using a crossover. The drilling assembly urged into the seafloor until a casing latch on the drilling assembly is engaged with a casing profile of the conductor pipe. During drilling, instrumentation in the drilling assembly may be used to measure geophysical data. The measured data may be used to optimize the drilling process. After the drill casing is engaged with the conductor pipe, cementing may be performed to set the drill casing.
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Citations
46 Claims
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1. A method of lining a wellbore, comprising:
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positioning a first casing having a first wellhead in the wellbore; providing a drilling assembly having; a second casing having a second wellhead, wherein the second wellhead is adapted to seat in the first wellhead; a conveying member having a diameter less than the second casing; a tubular adapter for coupling the conveying member to the second casing, wherein the tubular adapter is adapted to transfer torque from the conveying member to the second casing; and a drilling member disposed at a lower end of the second casing; lowering the drilling assembly into the first casing; coupling the second casing to the first casing; and seating the second wellhead in the first wellhead. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An apparatus for lining a wellbore, comprising:
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a first casing having a first wellhead; a drilling member disposed at a lower end of the first casing; a conveying member having a diameter less than the first casing; and a tubular adapter for coupling the conveying member to the first casing, wherein the first wellhead is adapted to seat in a second wellhead of a second casing. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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45. A method of lining a wellbore, comprising:
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positioning a first casing having a latch receiving member in the wellbore; providing a drilling assembly having; a second casing having a wellhead and a casing latch, wherein the casing latch is adapted to allow rotation of the second casing without rotating the first casing; a conveying member having a diameter less than the second casing; a tubular adapter for coupling the conveying member to the second casing, wherein the tubular adapter is adapted to transfer torque from the conveying member to the second casing; and a drilling member disposed at a lower end of the second casing; lowering the drilling assembly into the first casing; coupling the second casing to the first casing by engaging the casing latch to the latch receiving member. - View Dependent Claims (46)
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Specification