Objective
The aim of the project is to design, build and experiment a new drilling drawworks. This drawworks should be driven by a synchronous motor which should be 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 and automatic drilling.
The achievement and the tests which have been made have shown that :
functionally the new drawworks can replace a 3000 HP conventional drawworks.
Geometrically it less cumbersome and less heavy than a conventional drawworks.
- In the internal safety field, by experimentation of elementary failures, it has been shown that the new drawworks presents a safety level superior to the one of a conventional drawworks.
The easiness of control operations :
- leads to a driller's training time which is very short;
leave very little place for manipulation errors.
Moreover the presence of progressive lower and upper travel limits and programmable speed limits (which do not exist on a conventional drawworks) reduce the required vigilance and consequently the driller's fatigue - this should reduce the risk of accidents and increase the operations speed.
During the tests, drillers and their helpers have worked with the drawworks and have confirmed the above mentioned judgement.
The drilling charts show allow that 3 hours after taking control for the first time the regularity of operations and the different cycles are as well as those recorded on a conventional drawworks.
The drawworks offers the following possibilities :
- to realise easily the automatic control of drilling parameters;
- to control block position to include the drawworks in an automatic tripping system.
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 breaking torque. Rotation speed can reach 25 m/s for fast line speed.
- The whole system is equipped with POSITION and SPEED regulation acting as safety.
- Moreover, the drawworks is equipped with a drawworks console allowing to program tripping (inferior and superior stopping points, setting of maximum speed).
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Programme(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
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.