| Patent Number |
Title Of Patent |
Date Issued |
| 5604185 |
Inhibition of scale from oil well brines utilizing a slow release composition and a preflush and |
February 18, 1997 |
| An improvement in a method for the inhibition of scale deposition on the surfaces of a well coproducing oil and scale forming brines, said method comprising injecting into the well reservoir an acidic aqueous solution at a first pH containing dissolved therein a scale inhibitor, multival |
| 5377758 |
Method for effective placement of a long life scale inhibitor |
January 3, 1995 |
| A method for placement of a long life scale inhibitor into a formation where variable density scale inhibitors are utilized. A substantially low density non-reactive fluid is loaded into an interval of the formation to be treated. Afterwards, a high density first stage scale inhibitor is |
| 5308602 |
Synthesis of crystalline ultra-large pore oxide materials |
May 3, 1994 |
| There is provided a method for preparing crystalline ultra-large pore oxide materials. The materials are formed from reaction mixtures comprising an amphiphilic compound, such as a cetyltrimethylammonium compound, a source of at least one oxide, such as silica, and water. The concentrati |
| 5141655 |
Inhibition of scale formation from oil well brines utilizing a slow release |
August 25, 1992 |
| A method for the inhibition of scale deposition on the surfaces of a well coproducing oil and scale forming brines comprising injecting into the well reservoir an acidic aqueous solution at a first pH containing dissolved therein a scale inhibitor, multivalent metal ions, and a heat |
| 5089150 |
Method of increasing retention of scale inhibitors in subterranean formations |
February 18, 1992 |
| A novel method of injecting or squeezing a cross-linked scale inhibitor down a well into a subterranean formation which significantly lengthens its effective life is accomplished by cross-linking a carboxylic acid-containing polymeric or organophosphorus-containing inhibitor with a p |
| 5068042 |
Dissolution of sulfate scales |
November 26, 1991 |
| The invention provides for the use of compositions to dissolve sulfate scales from surfaces containing these scales, comprising an aqueous solution of an aminopolycarboxylic acid (APCA) containing 1 to 4 amino groups, e.g., diethylenetriaminepentaacetic acid (DTPA) or ethylenediamine |
| 5008025 |
Sulfonate-containing polymer/polyanionic cellulose combination for high temperature/high pressur |
April 16, 1991 |
| A method and composition for improving high temperature and high pressure filtration control in a water base drilling fluid is described. Polyanionic cellulose is combined with a synthetic sulfonate containing vinyl polymer into a drilling fluid to provide for unexpectedly improved f |
| 4947934 |
Method of increasing retention of scale inhibitor in subterranean formations |
August 14, 1990 |
| A method for inhibiting the formation of scale in a well penetrating a subterranean formation for the production of fluids from the formation comprising injecting into the formation an acidic aqueous solution having a pH effective to form a water-soluble complex of the inhibitor and the |
| 4855526 |
Process for preparing ethylene-higher olefin copolymer oils with Ziegler-Natta catalyst in mixed |
August 8, 1989 |
| Low viscosity copolymers of ethylene and higher olefins are prepared with Ziegler-Natta catalysts in the presence of an aliphatic-aromatic solvent mixture, e.g., 1:1 (by volume) of hexane:toluene. The copolymerization can be conducted without hydrogen and subsequent cracking or dewaxing |
| 4787455 |
Method for scale and corrosion inhibition in a well penetrating a subterranean formation |
November 29, 1988 |
| A method for inhibiting the formation of scale and corrosion in a well penetrating a subterranean formation for the production of fluids from the formation comprising injecting a predetermined amount of microparticles of a basic anion exchange resin providing a source of polycations into |
| 4779679 |
Method for scale and corrosion inhibition in a well penetrating a subterranean formation |
October 25, 1988 |
| A method for inhibiting the formation of scale and corrosion in a well penetrating a subterranean formation for the production of fluids from the formation comprising injecting a predetermined amount of microparticles of a cation exchange resin loaded with the desired cations into the fo |
