Search Result : drilling

Search Result : drilling

CMC carboxymethyl cellulose

CMC Carboxymethyl Cellulose or cellulose gum is a kind of cellulose with carboxymethyl groups (-CH2-COOH) bound to some of the hydroxyl groups of the glucopyranose monomers that make up the cellulose backbone. It is often used as its sodium salt, sodium carboxymethyl cellulose.CMC is one of the most important water-soluble polymers with many advantages that other natural or synthetic glues do not have. It is white and flowing fine powder. İt has no smalless, tasteless, nontoxic and [...]

PAC Polyanionic Cellulose

PAC Polyanionic cellulose is a non-toxic water-soluble cellulose product using in wide areas. Its appearance is white and yellowish powder and easily soluble in both cold and hot water. It is chemically different kind of cellulose existing in wood and cotton liters. It has high resistance to salt and good heat stability. PAC Polyanionic cellulose is kind of cellulose with high uniformity and high degree substitution. It has excellent heat-resistant stability, salt tolerance and strong [...]


The bentonite products available on the market can be divided into three basic types: natural calcium or sodium activated sodium polymer-modifiedApplication of BentoniteThe most common use of bentonite is in drilling fluids. The material  in the flush fluid lubricates and cools the cutting tools while protecting against corrosion. As the drilling fluid generates hydrostatic pressure in the borehole, it hinders [...]


What is barite?Barite is a mineral composed of barium sulfate (BaSO4). It receives its name from the Greek word ‘barys’ which means ‘heavy.’ This name is in response to barite’s high specific gravity, which is exceptional for a nonmetallic mineral. The high specific gravity of barite makes it suitable for a wide range of industrial, medical, and manufacturing uses. Barite also serves as the principal ore of barium. The primary countries in which commercial [...]


Hematite is a high-quality material and weighting agent exist underground. In drilling mud, it has a crystal structure and it is so beneficial being this kind of structure. It increases the mud weight additionally It is so heavy when you compare this with same sizes item.When hematite uses in drilling fluid or fluid helps in achieving a higher weight for the drilling fluid. On an ideal consideration, a low mud weight or as low as the weight of water is a beneficial choice to achieve the [...]

Carbonate calcium

Calcium carbonate is one of the most commonly used additives in the paper, paint and plastics industries. While naturally occurring ground calcium carbonate (GCC) is usually used as filler in many applications, synthetically manufactured precipitated calcium carbonate (PCC) may be tailor-made with respect to its morphology and particle size allowing this materials to fulfill additional functions.However, commonly known PCC production processes including the steps of calcimine crude [...]

Micro silica

Micro silica or silica fume includes silicon dioxide is very reactive mineral additive. It uses in wide areas such as drilling mud, construction, electrical and furnaces during reduction of very pure quartz. Micro silica cools so rapidly and forms extremely fine in a minute. It used as a filler or extender in rubber or plastic industry. It is weighting agent in down hole and also decreases permeability. In construction it improves the strong and permeability of roofing panelA lot of [...]


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 [...]