Search Result : drilling fluid

Search Result : drilling fluid


GILSONITE A UNIQUE ADDITIVE FOR OIL-WELL CEMENTS

Since Gilsonite, a solid hydrocarbon, was introduced to the oil industry in August 1957 as a cement additive, several thousands of jobs have been performed using the material. These operations have included primary cementing through lost-circulation zones of surface, intermediate, and production pipe in both single and multiple stages as well as various remedial jobs such as squeezing, re-cementing above inadequate fill-up, and plugging back to reestablish drilling-fluid circulation. [...]

Bore-Plate Development

For many years, Gilsonite had been recognized by the industry as a solution to shale sloughing, hole enlargement, and borehole instability. In the early 1980s, at the request of American Gilsonite Company, owned by Chevron Corporation, the Chevron Drilling Fluids at the Drilling Technology Center, investigated how Gilsonite works under downhole conditions. A review of the testing equipment available at that time revealed there was no equipment that could accurately evaluate the action of [...]

Bore-Plate®: The Proven Solution

Bore-Plate Shale Stabilizer was developed by American Gilsonite Company with three main objectives in mind. These are: excellent shale stability, excellent reaction in a water environment (drilling fluid), and easy dispersability. These objectives were achieved and tested under the guidance of Chevron's Drilling Technology Center using the O-G-S Downhole Simulation Cell (DSC) in Houston, Texas.First, tests showed that maximum shale stability would be achieved with different [...]

Development of a Low Invasion Coring Fluid for High Permeability Sand stones

Mud-filtrate invasion during coring operations has been a major factor affecting the validity of in-situ saturations in reservoir rock. Laboratory studies have documented the possible effects of the drilling mud filtrate invasion on the rock wettability. Considerable effort has been devoted to the measurements of relative permeability by the laboratories of major oil companies or commercial laboratories. Accurate data is quite important in the projection of future reservoirs. Many different [...]

Huntington Research Centre Report

SUMMARYTest Substance : Bore- PlateTest Species : Brown shrimp (Crangon crangon)Test Type : Acute toxicity. 96 h LC 50Test Conditions : Semi-static test conditions according to guidelines issued by the Ministry of Agriculture, Fisheries and Food, Burnham-on-Crouch, U. K.ResultsTest substance : Bore- Plate96h LC50                95% confidence limits (mg/l)    (mg/l) > [...]

Evaluate the Effectiveness of Gilsonite as a Borehole Stabilizer

by N. Davis II and C.E. Tooman, Chevron Services Co.SPE MembersCopyright 1988, IADC/SPE Drilling ConferenceThis paper was prepared for presentation at the 1988 IADC/SPE Drilling Conference held in Dallas, Texas, February 28-March 2, 1988This paper was selected for presentation by an IADC/SPE Program Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper, as presented, have not been reviewed by the Society of Petroleum [...]

Sloughing Shales

Sloughing shales or heaving shales were encountered in ATDM Gilsonite Co. operations in the Hackberry Field, La. during the late 1960's. . Numerous fishing jobs because of sloughing shales plagued drilling operations, and the costs of reaming tight holes and weighting up the drilling fluids raised drilling costs substantially. One of the most common solutions to the problem was the use of relatively high mud weights, but this resulted in slow penetration rates, high mud costs, and [...]