Filtrate Loss Control Shale Control

 Typical PropertiesSoftening Point (ASTM E28-92)Ash (ASTM D271-70M)Moisture (AGC Method)Penetration (25°C, 100 gm, 5 sec.)Specific GravityColor in MassFlash Point (COC)Sulfur166-177°C330-350°F<=3.0%<=1.0%01.06Black316ºC; 600ºF0.3%   Typical Particle Sizing (ASTM E11-70)% Retained (Cumulative) Pulverized+ 10 mesh+ 35 mesh+ 65 mesh+ 100 mesh+ 200 mesh--0<=1<=5<=25 Well CleanupGilsonite Resin GP Grade is soluble in aromatic solvents [...]

December 10, 2017

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 attempts have been made to preserve the in-situ wettability by use of special coring fluids and preservation techniques at the drilling site. Considerable improvement in data reliability could be achieved if the coring mud-filtrate invasion is eliminated during coring operations.Mud filtrate invasion of the core occurs by three mechanisms. First, [...]

December 10, 2017

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 softening points of Gilsonite® depending on the bottom hole temperature. To achieve a product that would work under a wide range of downhole temperatures, several softening points and different quantities of Gilsonite were tested. Further testing in the DSC determined the optimum mix of high vs. low melting point materials in the final [...]

December 10, 2017

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 Gilsonite and asphalts under downhole conditions. It was only until the mid-1980's the O-G-S Laboratory developed this type of equipment . The equipment could measure the instability of shales caused by filtrate invasion under downhole pressures and temperatures by drilling a borehole through the shale and circulating heated drilling fluid for up 50 [...]

December 10, 2017


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. Designed primarily as a combination low-density lost-circulation slurry, Gilsonite has yielded excellent results in areas of incompetent formations as well as in other types of lost-circulation zones. Field results generally show that fill-up of 80 to 90 percent can be obtained in areas where only 50 to 60 percent fill-up was possible with other types of [...]

December 10, 2017

A Better Resin for Heatset Gel Varnishes

A Better Resin for Heatset Gel VarnishesEnvironmental Resin ER-125 is a hydrocarbon-based resin created by ATMD Gilsonite Company for use in offset inks, particularly heatset inks. ER-125 Resin is soluble in aliphatic mineral distillates and vegetable oils. It creates varnishes with low and stable viscosities and is an almost totally pure aliphatic hydrocarbon with less than 0.05% impurity content.The raw material for ER-125 manufacture is Gilsonite® resin, a naturally occurring hydrocarbon material, well known in ink making for its excellent carbon black dispersing abilities. Gilsonite resin itself is a wide variety of different types of hydrocarbon molecules which may be characterized into two major types: straight chained aliphatics and ring-structured aromatics. Gilsonite also contains a small amount of impurity content, [...]

December 10, 2017

Gilsonite Selects 325 Grade

Principal Applications Printing Inks (Gravure, Offset) Paints and Stains Protective CoatingsPropertiesViscosity (25°C, 30% solids, Magie 470)Softening Point (ASTM E28-92)1,500-6,000 cPs154-169°C310-335°F0.25-0.40% Typical0.90% Max. Guaranteed0.2-0.5% Typical0.7% Max. Guaranteed Ash (ASTM D-271-70 M) Moisture (AGC Method) Penetration (25°C, 100 gm, 5 sec.)Flash Point (COC)SulfurSpecific GravityColor In Mass0316°C; [...]

December 10, 2017

Gilsonite in Black Offset Inks

Environmental Resin's Performance in Low Rub Black Offset InksINTRODUCTIONThe development work covered in this article compares the use of ATDM Gilsonite Company's product, Environmental Resin ER-125, in rub- resistant web offset blacks, versus the Asian and European use of rosin modified phenolics. While phenolic systems are not common in the U.S., they can produce inks of ultimate rub resistance. With the use of suitable gelling agents, phenolic systems can be made to lithograph extremely well at very high speeds on all types of presses.Secondly, the work looks at using combinations of ER-125 and Gilsonite to alter flow and rheology to produce inks that are suited to all common ducts systems including overshot, undershot, and rail system without the need for flow agents such as treated clay.MODIFIED PHENOLIC [...]

December 10, 2017

Gilsonite LXP Selects Grade

Gilsonite LXP Selects Grade PropertiesViscosity (25°C, 30% solids, Magie 470)Softening Point (ASTM E28-92)500 - 900 cPs154-168°C309-335°F0.20% Typical0.30% Max. Guaranteed0.2-0.5% Typical0.7% Max. Guaranteed Ash (ASTM D-271-70 M) Moisture (AGC Method) Penetration (25°C, 100 gm, 5 sec.)Flash Point (COC)SulfurSpecific GravityAcid No.Color In Mass0316°C; [...]

December 10, 2017

Performance Comparisons of Heatset Ink Formulations

Environmental Resin ER-125 is a hydrocarbon-based resin created by ATDM Gilsonite Company for use in all types of black offset inks. The resin is soluble in aliphatic mineral distillates, comparable with hydrocarbon, phenolic and alkyd resins, and creates varnishes with low and stable viscosities. ER-125 is almost totally pure aliphatic hydrocarbon with less than 0.05 percent impurity content.AGC's research shows that Environmental Resin ER-125 can provide the heatset ink maker with several major advantages. Several benefits can be achieved by using ER-125 Resin as either a full or partial replacement of the hydrocarbon (C5-C9's), phenolic and alkyd resins commonly found in black heatset ink recipes. ER-125 Resin's major benefits in a black heatset ink can be summarized as follows:greatly increased flow;low tack [...]

December 10, 2017

Differences between Gilsonite and ER 125 Resin

Gilsonite Resin is composed of a wide variety of different types of hydrocarbon molecules. They may be characterized into two major categories, aliphatics and aromatics. Gilsonite contains approximately 45% to 50% of each.Aliphatics are those hydrocarbons which have the carbon atoms bonded to each other in single bonds. Usually, aliphatics are drawn with the carbon atoms in straight chains with the hydrogen atoms branching off from them sideways. In Gilsonite, the aliphatic hydrocarbons have lower softening points and lower molecular weights.Aliphatic hydrocarbons dissolve in the weak, aliphatic solvents (mineral oil, ink oil, white spirits) commonly used to make offset printing inks. When they are dissolved in aliphatic solutions, they yield low initial viscosities and stable solution viscosities over time. In general, aliphatic [...]

December 10, 2017

Foundry Sand Additive Refractories Ingot Mold Coating Briquette or Pellet Binder

Foundry Sand Additives and Additive I. Purpose of a Carbonaceous AdditiveA. Reduce imperfections due to the rapid reaction between the silica sand mold and the oxidized surface of molten iron.B. Improve sand peel from casting at shakeout.C. Produce smoother, cleaner casting surface.D. Minimize imperfections, casting losses, scrap.II. Additive TheoriesA. Gaseous Cushion TheoryDuring pouring, the gases given off from the carbonaceous additives form a gaseous film which prevents the molten metal from making direct contact with the clay-coated sand grains, reducing sand-metal contact and consequently burn-on.B. Lustrous Carbon TheoryWhen heated, the carbonaceous materials provide volatile, hydrocarbon gases which then pyrolize to deposit a lustrous carbon graphitic layer in the metal-mold [...]

December 10, 2017