Drilling Hard and Abrasive Rock Efficiently or Generating Quality Cuttings? You No Longer Have To Choose
|Publisher:||Society of Petroleum Engineers|
|Content Type:||Conference Paper|
|Authors:||Sébastian Desmette, SPE, Benoit Deschamps, SPE, and Ron Birch, SPE, Diamant Drilling Services, and Matthieu Naegel, SPE, and Philippe Essel, SPE, Total|
|Source:||SPE Annual Technical Conference and Exhibition, 21-24 September 2008, Denver, Colorado, USA|
|Copyright:||2008. Society of Petroleum Engineers|
|Disciplines:||1.2.1 Bit Selection, Performance 1.4.3 Downhole Operations (Casing, Cementing, Coring, Geosteering, Fishing) 1.2.2 Drillstring Design 1.1.4 Real-Time Data Transmission, Decision-Making 6.1.1 Exploration, Development, Structural Geology|
The drilling of hard formations usually requires specific drilling systems to achieve an efficient rate of penetration. Due to the limited depth of cut, the solution often involves the use of high RPM drive systems such as turbines or high speed motors and a fixed cutter product is usually the drill bit of choice.
With increasing well depth the roller cone option is normally avoided due to the low penetration rates and limited rotating hours obtainable with these drill bits. Roller cone use invariably leads to multiple trips and a significant increase in the time and cost of the drilling operation, especially for deeply buried reservoirs where hard rocks are generally encountered and bit diameter is reduced at TD.