The thermal response of polycrystalline diamond compact cutters under simulated downhole conditions

Conference · Sat Oct 01 04:00:00 EDT 1983 · Soc. Pet. Eng. AIME, Pap.; (United States)

OSTI ID:5361518

Glowka, D; Stone, C M

An analytical method is developed to predict temperatures in polycrystalline diamond compact (PDC) drag cutters under steady state and transient downhole conditions. The method is used to determine mean wearflat temperatures for cutters under conditions used in previous experiments to measure cutter wear. A correlation between wearflat temperatures and cutter wear rates is demonstrated, and it is shown that, for the particular rock type tested, cutter wear rates increase significantly above 350/sup 0/C. The concept of a critical weight-on-bit, above which wearflat temperatures exceed this value, is introduced. The effects of several parameters on the critical weight-on-bit are examined. These include cutter thermal conductivity, diamond layer thickness, rock properties, convective cooling, bit balling, and transient events such as bit bounce. Preliminary results of thermal stress modeling show that yielding of the cutter structure can occur under certain downhole conditions.

• Research Organization: Sandia National Laboratories
• OSTI ID: 5361518
• Report Number(s): CONF-8310121-
• Conference Information: Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE11947
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
CARBON
CRYSTALS
CUTTING TOOLS
DIAMONDS
DRILL BITS
DRILLING
DRILLING EQUIPMENT
ELEMENTAL MINERALS
ELEMENTS
EQUIPMENT
FORECASTING
MATHEMATICAL MODELS
MEASURING METHODS
MINERALS
NATURAL GAS WELLS
NONMETALS
OIL WELLS
PHYSICAL PROPERTIES
POLYCRYSTALS
SIMULATION
STRESSES
TEMPERATURE DEPENDENCE
TEMPERATURE MEASUREMENT
THERMAL CONDUCTIVITY
THERMAL STRESSES
THERMODYNAMIC PROPERTIES
TOOLS
WELL DRILLING
WELLS