IADC/SPE151140
Innovative Tubular, Hoisting,
and Deepwater Rig Designs
Extend Hook Load Envelope to
2,000,000 Pounds
J. N. Brock, R. B. Chandler, NOV Grant Prideco; C. Selen, Maersk Drilling USA; J. Dugas, W. White, Quail Tools; M. Vasquez, A. Jonnalagadda, Statoil
Agenda
 Well Description
 Challenges
 Systems Involved
1. Casing string
2. Drill pipe landing string and cement stand
3. Top drive section, hoisting and casing handling equipment
 Pre-Job Inspection of Drill Pipe Landing String and Rig
Load-Path Components
 Planning Phases for a 2-Million Pound Hook Load
 Simulation work and results
 Design load, landing string configuration, and safety factors
 Execution
 Conclusions
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Walker Ridge Blk. 543 #1
Tucker
• WD = 6,667 ft. (UDW)
• Sub-salt
– ~14,000 ft. salt body
• Directional well = 25º inc.
• Multiple CSG strings
– BBII; 6 CSG strings in place
• 14” x 13-5/8” CSG at 24,893 ft.
– 18,226 ft. long tapered CSG string
– 2 million pound hook load
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Challenge
• Safely Makeup and Run 18,226 ft. of
14” x 13-5/8” Tapered Casing String
– Ensure drill pipe landing string meets or
exceeds load requirements
– Ensure ALL hoisting and casing running
equipment meets or exceeds load
requirements
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System I: Casing
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System II: Landing String
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System II: Cement Stand
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System III: Top Drive and Hoisting
System
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Performed Load Path Inspection
• Load Path Inspection to be Conducted “On The Critical
Path” for an Expected 2 Million Pound Load
• Allocated 76 Hours to Conduct the Inspection
– Conducted inspection in 48 hours
• In Addition, ALL Drill Pipe Landing String and Handling
Tools Were Inspected, as Well as the Surge Reduction
Tool and Cementing Head
• Brake Test Conducted and Magnetic Particle Inspection
of Disc Brake Conducted Right Before Running the 14” X
13-5/8” Casing String
• Slip & Cut Drill Line Right Before Running the Casing
String
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Components Inspected
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Drill Pipe Landing String
Configurations
• Drill Pipe Inspected To ≥ 95% RBW
For Tension and Slip Crushing
Calculations
– SF in tension = 1.2
– SF for slip crushing = 1.3
• To account for dynamic loads
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Slip and Elevator System
1,000 ton Hydraulically
Actuated Slip Assembly
1,000 ton Hydraulically
Actuated Elevator
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6-5/8” OD 0.938” Wall Slip-Proof
Drill Pipe Landing String
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DP Landing String Safety Factors
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Planning Phase – Simulation
Results (Output)
TIH Stretch = 24.6 ft.
(Casing Stretch = 7.3’ + LS Stretch = 17.3’)
TOH Stretch = 32.2 ft.
(Casing Stretch = 11.1’ + LS Stretch = 21.1’)
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14” x 13-5/8” Running Loads – 1.98
Million Pound (889 MT)
Tripping-in
simulation is
spot on – see
the light green
line
Directional work started at 18,000 ft.
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Execution: Running 14” x 13-5/8”
Casing At 24,763 ft.
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Conclusions
1. Tubular Technology Has Advanced
Sufficiently to Make Possible the Safe
Running of up to 2 MM lbf Hook Load
Casing Strings
2. Attaining Greater Than 95% Wall
Thickness Drill Pipe Landing String Is
Possible
–
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Continue tracking of drill pipe wall thickness is
critical in order to sort out joints in the landing string
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Conclusions
3. Load-Path Inspection Is Critical to Ensure
the Safety of the Operation
–
Careful planning is required as this is done in the well
program’s critical path prior to drilling this hole section
4. Tracking “Drag” During the Running of
Casing Strings Allows the Forecast of
Forces Associated with Heavy Casing
String
–
There Is a point (depth) of “no return” when running
heavy casing strings
•
•
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The total of the string weight and drag prevent pulling the
casing out of the hole
Understanding this point by operations is “key” to the success
or failure of landing the casing string, specifically if it comes
earlier than expected
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Conclusions
5. The Challenge Involved with Setting of
Larger Diameter and Heavier Casing
Strings with Total Setting Hook Loads
Approaching 2 MM lbf has been met by
Implementing a Total Systems Approach
6. On the First Well Drilled by the New
MAERSK DEVELOPER, All Rig Equipment
Performed as Designed and the Crews
Demonstrated Their Competency by
Successfully Managing the World Record
Casing Setting Operation
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Thank You
The authors wish to thank the management of Statoil ASA, Maersk Drilling USA, Inc., Quail Tools, and NOV Grant Prideco for their support and encouragement in publishing this paper.