Results 191 to 200 of about 2,421 (246)

Drilling String Corrosion - A Major Drilling Problem

Journal of Canadian Petroleum Technology, 1967
Abstract The sources of drilling string corrosion are discussed, together with an economic estimate of the magnitude of this problem in our drilling industry. Problems associated with measuring the corrosion rate in drilling fluids under field conditions are reviewed.
A.S. Murray, W.E. Holman
openaire   +1 more source

Drill String Management to Reduce Drilling Risks

IADC/SPE Drilling Conference, 1998
Abstract Increases in recent and projected rig activity are putting tremendous strains on current inventories of drilling tools and on the industry supply chain attempting to bolster those inventories. Additionally, while much of the new activity is centered in established oil provinces and using established ...
M.A. Summers, S.R. Crabtree
openaire   +1 more source

Performance of Drill String Hardfacings

Journal of Energy Resources Technology, 1984
Drill string hardfacings are composites of steel and tungsten carbide applied by welding techniques. This paper discusses the important variables involved and gives experimental results for casing wear and abrasive wear resistance.
J. S. Williamson, J. Bolton
openaire   +1 more source

Drill String Failures: Inevitable or Not?

IADC/SPE International Drilling Conference and Exhibition
Abstract The past few years have seen many experienced drilling operations personnel retire. Coincidently, the industry saw an increase in the number of drillstring failures, some of which could have potentially been avoided. These failures can result in non-productive time (NPT) like fishing trips, side tracking, or exorbitant repair ...
G. Plessis, D. Morgan, D. Meinders, C. Wade   +3 more
openaire   +1 more source

Longitudinal Vibrations of a Drill String

The Journal of the Acoustical Society of America, 1965
When drilling an oil well with a rotary drill, the penetration rate often can be substantially increased by superimposing a vibratory motion on the rotating bit. In order to evaluate drilling methods that would include both rotary and vibratory action, a study has been made on the vibrational characteristics of long drill string. The resonant frequency
openaire   +1 more source

Data transmission in a drill string

The Journal of the Acoustical Society of America, 1984
Data is transmitted through a drill string by means of acoustical energy by transmitting an acoustical signal for a first predetermined interval and ceasing transmission of the signal for a second predetermined interval to represent a first binary state; ceasing transmission of the signal for a third predetermined interval to represent a second binary ...
openaire   +1 more source

Ground Measurement of Noise Characteristics in Drill String During Drilling

SSRN Electronic Journal, 2022
Liu Yongwang, Lin Guojun, Du Binbin, Guan Zhichuan, Zhao Guoshan   +4 more
openaire   +1 more source

Nonlinear dynamic characteristics of the drill-string for deep-water and ultra-deep water drilling

Journal of Petroleum Science and Engineering, 2022
Feng Chen
exaly  

drill string

2014
openaire   +2 more sources

Analysis of the Influence of Downhole Drill String Vibration on Wellbore Stability

Machines, 2023
Li Yafeng
exaly