Results 171 to 180 of about 14,166 (227)

Flexible Bit: A New Anti-Vibration PDC Bit Concept

SPE Annual Technical Conference and Exhibition, 1995
ABSTRACT This paper introduces the novel concept of a "flexible" polycrystalline diamond compact (PDC) bit, and its capability to reduce detrimental vibration associated with drag bits. The tilt flexibility, introduced at the bit, decouples the dynamic motion of the bottom hole assembly (BHA) from that of the bit, thus providing a ...
P. M. Defourny, Fereidoun Abbassian
openaire   +1 more source

Bit Balling Mitigation in PDC Bit Design

IADC/SPE Asia Pacific Drilling Technology Conference and Exhibition, 2008
Abstract Historically, parameters like junk slot area (JSA), face volume (FV) and hydraulic horsepower per square inch of bit area (HSI) have been used to empirically predict the balling performance of drill bits. These performance gauges, however, generally produce inconsistent results. This paper presents new design features, guided by
Michael Wells, Tim Marvel, Chad Beuershausen   +2 more
openaire   +1 more source

Microwave PDC Drill Bit

Advanced Materials Research, 2013
On the rotary drilling system, the technologies for fracturing and cutting hard rock are mainly mechanical rock breaking methods by use of improving bottomhole water horse power and bit energy, and the working life and rock breaking efficiency have much room for improvement.
Zong Gang Wang, Zhen Wei, Lai Ju Han
openaire   +1 more source

Hydraulic Optimization of PDC Bits

European Petroleum Conference, 1990
ABSTRACT The aim of our work is to improve the understanding of flow distribution and determine the optimum set of hydraulic design parameters that favour the drilling fluid circulation, with both computations and experiments. Once a new bit design has been defined according to these criteria, field tests will be done for a final ...
I. King, C. Bratu, B. Delbast, A. Besson, J.P. Chabard   +4 more
openaire   +1 more source

Where and How Not to Run PDC Bits

Proceedings of IADC/SPE Drilling Conference, 1983
Abstract A comparison has been made of the results obtained with a new soft formation PDC bit (the Security STRAT-X Bit) and those obtained in a wide range of formations with the various types of PDC bits currently available. The results indicate that, at present, PDC bits are special products for special situations. The clearly superior
W. S. Keller, M. L. Crow
openaire   +1 more source

Bit Wobble: A Kinetic Interpretation of PDC Bit Failure

Proceedings of SPE Annual Technical Conference and Exhibition, 1994
ABSTRACT Considering the configuration of bottom hole assembly (BHA), rock properties, effect of BHA rotation, and fluid damping, this paper presents a kinetic model for vibration analysis of drilling bits in vertical holes. Based on this model, it is demonstrated that drill bits undergo wobbling motion in drilling conditions. This model
Boyun Guo, Geir Hareland
openaire   +1 more source

Bit Whirl: A New Theory of PDC Bit Failure

SPE Annual Technical Conference and Exhibition, 1989
ABSTRACT This paper presents the results of a study investigating PDC bit vibrations. The study shows that the most harmful vibrations can be attributed to a phenomena called "bit whirl". During whirl the instantaneous center of rotation moves around the face of the bit, and the bit backwards whirls around the hole. Cutters on a whirling
J. F. Brett, T. M. Warren, S. M. Behr
openaire   +1 more source

Field Experience With PDC Bits in Northeast Texas

Proceedings of IADC/SPE Drilling Conference, 1983
Abstract In an effort to improve penetration rates of infill drilling in northeast Texas, Sun Gas Division, Sun Exploration and Production initiated a program to evaluate the performance of polycrystalline diamond cutter (PDC) bits. Numerous bit runs were made in a selected interval in an attempt to determine which style PDC bit to use ...
M. A. Arceneaux, J. L. Fielder
openaire   +1 more source

Bit Whirl—A New Theory of PDC Bit Failure

SPE Drilling Engineering, 1990
Summary This paper presents the results of a study showing that the most harmful polycrystalline-diamond-compact (PDC) bit vibrations can be attributed to a phenomenon called "bit whirl." During whirl, the instantaneous center of rotation moves around the face of the bit, and the bit whirls backward around the hole. Cutters on a whirling
J. Ford Brett, Thomas M. Warron, Suzanne M. Bohr   +2 more
openaire   +1 more source

Study on the acceleration of single‐cone PDC composite bit

Mathematical Methods in the Applied Sciences, 2021
The single‐cone bit has become the first choice for slim hole sidetracking and deep well drilling with its unique rock breaking method and high ROP (rate of penetration). The single‐cone bits currently used in the oil field all use cemented carbide inserts, with its main failure mode being of early excessive wear of the cutting teeth.
Chunyan Kong, Chongyang Wang, Rongjun Zhu, Guojun Wang, Chunlin Liu, Derong Zhang   +5 more
openaire   +2 more sources