skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Bore hole cleaning with gas cut mud

Abstract

One of the most important functions of a good drilling fluid is to clean the well bore. Under dynamic conditions, several factors including but not limited to hole geometry, particle dimensions, fluid properties, and surface equipment govern the effectiveness of hole cleaning. The effect of gas cutting on annular flow properties is discussed. Gas cutting can be considered a serious problem depending on the condition of the well bore during its occurrence. A gas cut annulus often serves as a warning of further and perhaps more serious problems if allowed to continue. Severe and continuous gas cutting most often is a clear warning of a kick. Entrained drilled solids increase the mud density and thus hydrostatic pressure on the borehole. As the gas rises to the surface, it expands and increases in volume thereby decreasing the mud weight and the mud column pressure. This often causes a serious concern to the driller and in practice may create a tendency to increase either the mud weight or the pump pressure unnecessarily.

Authors:
;
OSTI Identifier:
6227948
Resource Type:
Journal Article
Journal Name:
Well Serv; (United States)
Additional Journal Information:
Journal Volume: 21:3
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; BOREHOLES; CLEANING; DRILLING FLUIDS; CHEMICAL COMPOSITION; OIL WELLS; WELL SERVICING; GEOMETRY; HYDROSTATICS; PARTICLE SIZE; PLUGGING; WELL COMPLETION; WELL DRILLING; WELL STIMULATION; CAVITIES; DRILLING; FLUIDS; MATHEMATICS; SIZE; STIMULATION; WELLS; 020300* - Petroleum- Drilling & Production

Citation Formats

Chukwu, G A, and Galloway, L A. Bore hole cleaning with gas cut mud. United States: N. p., Web.
Chukwu, G A, & Galloway, L A. Bore hole cleaning with gas cut mud. United States.
Chukwu, G A, and Galloway, L A. . "Bore hole cleaning with gas cut mud". United States.
@article{osti_6227948,
title = {Bore hole cleaning with gas cut mud},
author = {Chukwu, G A and Galloway, L A},
abstractNote = {One of the most important functions of a good drilling fluid is to clean the well bore. Under dynamic conditions, several factors including but not limited to hole geometry, particle dimensions, fluid properties, and surface equipment govern the effectiveness of hole cleaning. The effect of gas cutting on annular flow properties is discussed. Gas cutting can be considered a serious problem depending on the condition of the well bore during its occurrence. A gas cut annulus often serves as a warning of further and perhaps more serious problems if allowed to continue. Severe and continuous gas cutting most often is a clear warning of a kick. Entrained drilled solids increase the mud density and thus hydrostatic pressure on the borehole. As the gas rises to the surface, it expands and increases in volume thereby decreasing the mud weight and the mud column pressure. This often causes a serious concern to the driller and in practice may create a tendency to increase either the mud weight or the pump pressure unnecessarily.},
doi = {},
journal = {Well Serv; (United States)},
number = ,
volume = 21:3,
place = {United States},
year = {},
month = {}
}