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).
Programme(s)
Topic(s)
Call for proposal
Data not availableFunding Scheme
DEM - Demonstration contractsCoordinator
92508 Rueil Malmaison Cedex
France