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Title: New PDC bit design reduces vibrational problems

Abstract

A new polycrystalline diamond compact (PDC) bit design combines cutter layout, load balancing, unsymmetrical blades and gauge pads, and spiraled blades to reduce problematic vibrations without limiting drilling efficiency. Stabilization improves drilling efficiency and also improves dull characteristics for PDC bits. Some PDC bit designs mitigate one vibrational mode (such as bit whirl) through drilling parameter manipulation yet cause or excite another vibrational mode (such as slip-stick). An alternative vibration-reducing concept which places no limitations on the operational environment of a PDC bit has been developed to ensure optimization of the bit`s available mechanical energy. The paper discusses bit stabilization, vibration reduction, vibration prevention, cutter arrangement, load balancing, blade layout, spiraled blades, and bit design.

Authors:
;  [1]
  1. Smith International Inc., Houston, TX (United States)
Publication Date:
OSTI Identifier:
52054
Resource Type:
Journal Article
Journal Name:
Oil and Gas Journal
Additional Journal Information:
Journal Volume: 93; Journal Issue: 21; Other Information: PBD: 22 May 1995
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; DRILL BITS; DESIGN; OPERATION; DRILLING EQUIPMENT; MECHANICAL VIBRATIONS; MITIGATION; DYNAMIC LOADS; EQUATIONS

Citation Formats

Mensa-Wilmot, G., and Alexander, W.L. New PDC bit design reduces vibrational problems. United States: N. p., 1995. Web.
Mensa-Wilmot, G., & Alexander, W.L. New PDC bit design reduces vibrational problems. United States.
Mensa-Wilmot, G., and Alexander, W.L. Mon . "New PDC bit design reduces vibrational problems". United States.
@article{osti_52054,
title = {New PDC bit design reduces vibrational problems},
author = {Mensa-Wilmot, G. and Alexander, W.L.},
abstractNote = {A new polycrystalline diamond compact (PDC) bit design combines cutter layout, load balancing, unsymmetrical blades and gauge pads, and spiraled blades to reduce problematic vibrations without limiting drilling efficiency. Stabilization improves drilling efficiency and also improves dull characteristics for PDC bits. Some PDC bit designs mitigate one vibrational mode (such as bit whirl) through drilling parameter manipulation yet cause or excite another vibrational mode (such as slip-stick). An alternative vibration-reducing concept which places no limitations on the operational environment of a PDC bit has been developed to ensure optimization of the bit`s available mechanical energy. The paper discusses bit stabilization, vibration reduction, vibration prevention, cutter arrangement, load balancing, blade layout, spiraled blades, and bit design.},
doi = {},
journal = {Oil and Gas Journal},
number = 21,
volume = 93,
place = {United States},
year = {1995},
month = {5}
}