Results 201 to 210 of about 2,300 (225)

Drilling Plastic Formations Using Highly Polished PDC Cutters

SPE Annual Technical Conference and Exhibition, 1995
Abstract Highly plastic and over-pressured formations are troublesome for both roller cone and PDC bits. Thus far, attempts to increase penetration rates in these formations have centered around re-designing the bit or modifying the cutting structure. These efforts have produced only moderate improvements.
R.H. Smith, J.B. Lund, M. Anderson, R. Baxter   +3 more
openaire   +1 more source

Friction on PDC Cutters at High Normal Stress

Journal of Energy Resources Technology, 2002
The impact of frictional forces on the overall forces when drilling with a PDC bit has previously been implied by models and by single cutter and bit tests. This report describes new experiments to measure friction between three different bit surface materials and two different rocks over a wide range of normal stresses in up to four different fluids ...
John R. Smith, Jeffrey B. Lund, Robert K. Galloway   +2 more
openaire   +1 more source

3D PDC Bit Model Predicts Higher Cutter Loads

SPE Drilling & Completion, 1993
Summary Historically, PDC bit modeling has incorporated the assumption that cutter forces are constant for a full revolution of the bit. This assumption places considerable limits on the model's ability to simulate drilling in nonhomogeneous rock and in cases where the bit whirls.
S. M. Behr, T. M. Warren, L. A. Sinor, J. F. Brett   +3 more
openaire   +1 more source

Curved Cutters Extend Range of Formations Drilled with PDC Bits

SPE/IADC Drilling Conference, 1989
ABSTRACT For the past few years the industry has been trying to extend the operating range of polycrystalline diamond compact (PDC) bits in terms of formations that can be drilled. Initially, the direction was uphole to the softer formations where the high standoff blade bits and large diameter PDC bits have proven economic.
R.H. Knowlton, R. Kester
openaire   +1 more source

PDC Bits Using Positive Rake Cutters

IADC/SPE Drilling Conference, 1990
ABSTRACT A radical new concept in bit technology has been developed for use in drilling the deep water shales of the Gulf of Mexico and the Mississippi Delta where both milltooth and conventional PDC bits have performed poorly. This new tool utilizes the following technical elements: Large diameter positive rake PDC cutters as the ...
openaire   +1 more source

The Analysis of Force on PDC Cutter

2014
In order to study the influences of different factors (such as cutting area, contact arc length, back dim angle and drillability of rocks) on the force of PDC bit, cutting tests on different kinds of rocks were done with PDC cutters. Conclusions can be drawn from those tests that with the same cutting area, the force on PDC cutter changes linearly and ...
Erguo Liang, Jinmin Wang, Lijun Zhou, Lijie Wang   +3 more
openaire   +1 more source

Study on interaction between rocks and worn PDC's cutter

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1997
Abstract This paper presents the results of a study investigating cutting response of a single worn PDC cutter with special attention on the friction on its wear flat which is badly understood in litterature. So, consider a cutter with horizontal wear flat fixed on a rotating bit with vertical axis.
H GEOFFROY, D NGUYENMINH, C PUTOT
openaire   +2 more sources

Investigation of PDC Cutter Structural Integrity in Hard Rocks

SPE Drilling & Completion, 2020
Summary Robustness of round and V-shaped polycrystalline diamond compact (PDC) cutters against mechanical and thermal load was evaluated. Forensic analysis was used to estimate the range of loads and depths of cut (DOC) that cause structural overload of PDC cutters.
Reza Rahmani, Paul Pastusek, Geng Yun, Tom Roberts   +3 more
openaire   +1 more source

PDC-Bit Evaluation by Cutter Instrumentation and Computer Simulation

Proceedings of SPE Annual Technical Conference and Exhibition, 1989
ABSTRACT A new tool for monitoring cutter performance is developed for selecting best PDC drilling conditions. The drilling efficiency of different PDC-bits can show great variations due to different drilling conditions and formations being drilled. Field tests are often unreliable for evaluation purpose because of limited
G. Homstvedt, A. Rødland
openaire   +1 more source

PDC drill bit with rotating cutters

Construction of Oil and Gas Wells on Land and Sea, 2022
R.M. Bogomolov, G.S. Mozgovoy
openaire   +1 more source