High-performance TSD bits improve penetration rate. [Thermally Stable Diamond]

Journal Article · Mon Apr 12 00:00:00 EDT 1993 · Oil and Gas Journal; (United States)

OSTI ID:6449344

Cohen, J H; Maurer, W C ^[1]; Westcott, P A ^[2]

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1. Maurer Engineering Inc., Houston, TX (United States)
2. Gas Research Inst., Chicago, IL (United States)

Optimizing the number, size, and orientation of clutters on thermally stable diamond (TSD) bits increases penetration rate and extends bit life. The use of optimized TSD (also commonly referred to as thermally stable product or TSP) bits on high-power drilling motors can greatly reduce drilling time for harsh-environment wells, such as deep gas wells. The power delivered to the rock governs drilling rate, and at high speed the optimized TSD bits are capable of effectively delivering power to drill the rock. This article reviews a 3-year project to develop advanced thermally stable diamond bits that can operate at a power level 5-10 times greater than that typically delivered by conventional rotary drilling. These bits are designed to operate on advanced drilling motors that drill three to six times faster than rotary drilling. These advanced bits and motors are especially designed for use in slim-hole and horizontal drilling applications. The TSD bit design parameters which were varied during the tests were cutter size, shape, density (number of cutters), and orientation. Drilling tests in limestone, sandstone, marble, and granite blocks showed that these optimized bits drilled many of these rocks at 500-1,000 ft/hr compared to 50-100 ft/hr for conventional rotary drilling. A sensitivity model showed that doubling the rate of penetration significantly reduced the time to drill a well and reduced costs by 13 %.

• OSTI ID: 6449344
• Journal Information: Oil and Gas Journal; (United States), Journal Name: Oil and Gas Journal; (United States) Vol. 91:15; ISSN OIGJAV; ISSN 0030-1388
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
030300* -- Natural Gas-- Drilling
Production
& Processing
CARBON
CARBONATE ROCKS
COST
DESIGN
DIAMONDS
DRILL BITS
DRILLING
DRILLING EQUIPMENT
DRILLS
ELEMENTAL MINERALS
ELEMENTS
EQUIPMENT
GRANITES
IGNEOUS ROCKS
LIFETIME
LIMESTONE
MARBLE
MATHEMATICAL MODELS
METAMORPHIC ROCKS
MINERALS
NATURAL GAS WELLS
NONMETALS
OPTIMIZATION
PERFORMANCE
PLUTONIC ROCKS
ROCKS
ROTARY DRILLS
SANDSTONES
SEDIMENTARY ROCKS
SENSITIVITY ANALYSIS
SERVICE LIFE
WELL DRILLING
WELLS