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Polycrystalline diamond compact bit hydraulics

Conference · · Soc. Pet. Eng. AIME, Pap.; (United States)
OSTI ID:5453881
; ;
It is well understood and documented that bottomhole hydraulics plays an important role in conventional diamond bit performance. Recent industry experience has shown a similar importance with the new synthetic diamond compact bits. Certain types of polycrystalline diamond compact bits have cutters arranged in a reverse spiral mode. For optimum performance bit hydraulic design should be tailored to that reverse spiral mode. Theory reveals that a bit built with rectangular nozzles with a long axis in the tangential direction can give a fluid velocity envelope similar to the envelope of the reverse spiral. A rectangle can also reduce bit plugging by providing an increased perimeter in a non-concentric geometry. The introduction of rectangular nozzles into the bit renders the regular round nozzle pressure drop equation unsuitable for direct application. Extensive hydraulic tests were performed with different configurations of rectangular nozzles to establish more accurate pressure loss equations. The experiments included single nozzle studies and laboratory and field tests of bits. Field test results confirmed the reliability of the results obtained in the laboratory studies.
Research Organization:
Christensen Diamond Products
OSTI ID:
5453881
Report Number(s):
CONF-820927-
Conference Information:
Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE11063
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
CARBON
CONFIGURATION
CRYSTALS
DATA
DESIGN
DIAMONDS
DRILL BITS
DRILLING
DRILLING EQUIPMENT
ELEMENTAL MINERALS
ELEMENTS
EQUATIONS
EQUIPMENT
EXPERIMENTAL DATA
FIELD TESTS
FLOW RATE
FLUID MECHANICS
HYDRAULICS
INFORMATION
MECHANICS
MINERALS
NONMETALS
NOZZLES
NUMERICAL DATA
PARAMETRIC ANALYSIS
PERFORMANCE
PERFORMANCE TESTING
POLYCRYSTALS
PRESSURE DROP
TESTING
WELL DRILLING