Impregnated Bit Drilled Deeply in 5,000 meters in Karamay Oilfield, China

OVERVIEW

The formation of Karamay Oilfield, Xinjiang is extremely hard which is mudstone/sandstone, and the compress strength is 24000PSI to 32000PSI, the footage of Conventional PDC Bit and Tricone Bit only reached 40-60 meters per bit with very low ROP, when POOH, the tooth of Tricone Bit and the cutters of PDC Bit were be breakage up to 60% to 70% due to the hard and abrasive lithology. Based on the situation, DeepFast provided strengthened Impregnated Bit (8-1/2” DI281) to achieve the aim.

PERFORMANCE

• Total footage of Impregnated Bit (8-1/2” DI281) is 249 meters, from 4531m to 4780m
• Total working time is about 82hours, ROP is 3m/h, which is better than conventional PDC Bit and Tricone Bit @ 0.8 to 1m/h
• The Bit keeps 70% as the original new one.
• The best ROP @ 10.61m/h