A Fitted for Purpose Slim-Hole Rig

ABSTRACT After testing new slim hole drill strings that are able to perform destructive drilling and wireline coring with positive drilling achievement and positive geological data acquisition, the construction of a purpose built rig for slim hole drilling has been undertaken. It is believed that a purpose built rig will lead to substantial drilling cost breakthroughs and greatly reduce the environmental impact of the drilling operation. Reducing the Drilling Cost Environmental protection Slim Hole Prilling Practices Slim hole drilling requires a refined control and measurement of all drilling parameters. To achieve this, we need: Slim hole drilling requires a new rrange of flow parameters versus conventional practices. An original solution has been developed and is presented in this paper. Based on the above criteria the paper will detail the solutions that provide the foundations adopted to build the slim hole purpose built rig. The rig has begun operations in France in April 1994. The initial results will be available.