Objective
The aim of the project is :
- to demonstrate the reliability of a new drilling drawworks of which a prototype is under test;
- and to define, from the tests of the prototype, the industrial version versus the manufacturing cost.
This drawworks is driven by a synchronous motor which is controlled by a system.
The whole having the following :
- providing a smooth and precise control of drum speed and position;
- is equipped with automatic end of travel stoppage;
- giving the possibility of digital positioning of load.
The prototype under tests has shown that all the functions required from a drawworks are satisfactorily acquired.
As was the objective the control of the operation is safer and less stressed than a conventional drawworks one.
The new drawworks is composed of:
- a drum equivalent to the one of a standard drawworks;
- a power assisted friction brake used as emergency and parking brake.
The drum is equipped with a 2 ratio box:
1) Hi speed ratio for tripping string;
2) Lo speed ratio for high load or low speed operations as casing, setting, instrumentation and automatic drilling.
Through the gear box, the drum is driven by a synchronous motor with a frequency convertor working in the 4
quadrants of torque versus speed diagram (2 rotation directions + 2 torque directions).
No clutch is placed on the transmission line of movement.
- A motor (3000 kW of nominal power) capable of developing necessary braking torque. Rotation speed can reach 35 m/s at speed line when unspooling and 24 m/s when spooling.
- The whole system is equipped with POSITION and SPEED regulation acting as safety.
- Moreover, the drawworks is equipped with a sophisticated drawworks console allowing to program tripping (bottom and top stopping points, setting of maximum speed).
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Programme(s)
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Topic(s)
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Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
92508 Rueil Malmaison Cedex
France
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.