Field application of diamond-bit hydraulic-lift principles

Journal Article · Fri Aug 01 04:00:00 EDT 1986 · SPE (Society of Petroleum Engineers) Drill. Eng.; (United States)

OSTI ID:5213379

Winters, W J; Warren, T M

Hydraulic lift can have a major effect on the operation of diamond drill bits. The actual weight on bit (WOB) is less than the measured weight by the amount of hydraulic lift, or pumpoff force, acting beneath the bit. Pumpoff forces in excess of 15,000 lbf (67 kN) have been recorded. Historically, the hydraulic-lift effect has been recognized but not understood well enough to be accounted for reliably. Failure to account for hydraulic lift can adversely affect actual bit performance and interpretation of the results. It is now possible to determine hydraulic lift reliably with the practical techniques presented here. Field tests show that pumpoff force tends to double as the bit dulls. Appropriate WOB adjustments, determined through pumpoff tests run on the rig, are required to maintain bit performance. The applications to diamond bits run on mud motors are particularly advantageous.

• Research Organization: Amoco Production Co., Tulsa, OK
• OSTI ID: 5213379
• Journal Information: SPE (Society of Petroleum Engineers) Drill. Eng.; (United States), Journal Name: SPE (Society of Petroleum Engineers) Drill. Eng.; (United States) Vol. 1:4; ISSN SDENE
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
42 ENGINEERING
420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
CARBON
DATA ANALYSIS
DIAMONDS
DRILL BITS
DRILLING
DRILLING EQUIPMENT
DRILLING RIGS
ELEMENTAL MINERALS
ELEMENTS
EQUIPMENT
FIELD TESTS
FLUID MECHANICS
HYDRAULICS
MECHANICS
MINERALS
MOTORS
NATURAL GAS WELLS
NONMETALS
OIL WELLS
PERFORMANCE
PRESSURE DROP
PRESSURE EFFECTS
TESTING
WEIGHT MEASUREMENT
WELL DRILLING
WELLS