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Title: Drilling fluid thinner

Abstract

A drilling fluid additive is described comprising a mixture of: (a) a sulfoalkylated tannin and (b) chromium acetate selected from the group consisting of chromium (III) acetate and chromium (II) acetate, wherein the chromium acetate is present in a weight ratio of the chromium acetate to the sulfoalkylated tannin in the range of from about 1:20 to about 1:1.

Inventors:
Publication Date:
OSTI Identifier:
5536226
Patent Number(s):
US 4842770
Assignee:
Phillips Petroleum Co., Bartlesville, OK NOV; NOV-89-074149; EDB-89-141969
Resource Type:
Patent
Resource Relation:
Patent File Date: 2 Mar 1988
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 03 NATURAL GAS; DRILLING FLUIDS; CHEMICAL COMPOSITION; ACETATES; ADDITIVES; CHROMIUM COMPOUNDS; QUANTITY RATIO; TANNIC ACID; AROMATICS; CARBOXYLIC ACID SALTS; CARBOXYLIC ACIDS; FLUIDS; HYDROXY COMPOUNDS; ORGANIC ACIDS; ORGANIC COMPOUNDS; PHENOLS; POLYPHENOLS; TRANSITION ELEMENT COMPOUNDS; 020300* - Petroleum- Drilling & Production; 030300 - Natural Gas- Drilling, Production, & Processing

Citation Formats

Patel, B. Drilling fluid thinner. United States: N. p., 1989. Web.
Patel, B. Drilling fluid thinner. United States.
Patel, B. Tue . "Drilling fluid thinner". United States. doi:.
@article{osti_5536226,
title = {Drilling fluid thinner},
author = {Patel, B.},
abstractNote = {A drilling fluid additive is described comprising a mixture of: (a) a sulfoalkylated tannin and (b) chromium acetate selected from the group consisting of chromium (III) acetate and chromium (II) acetate, wherein the chromium acetate is present in a weight ratio of the chromium acetate to the sulfoalkylated tannin in the range of from about 1:20 to about 1:1.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 27 00:00:00 EDT 1989},
month = {Tue Jun 27 00:00:00 EDT 1989}
}
  • Thixotropic compositions having initially relatively high viscosity which can decrease with time are employed in a method for cleaning a borehole. The compositions are prepared by admixing water and chloroform with an anionic surfactant, a cationic surfactant, an acid to adjust the pH of the aqueous phase to 4.5 or less, and a buffer salt. These compositions are valuable drilling fluids, fracturing fluids, and surfactant fluids for chemical flooding in tertiary oil recovery.
  • To improve drilling performance, a drilling fluid is selected based on one or more criteria and to have at least one target characteristic. Drilling equipment is used to drill a wellbore, and the selected drilling fluid is provided into the wellbore during drilling with the drilling equipment. The at least one target characteristic of the drilling fluid includes an ability of the drilling fluid to penetrate into formation cuttings during drilling to weaken the formation cuttings.
  • This patent describes a method of rotary drilling of a wellbore with a drill string, formed with sections of drill pipe, and having a drill bit at the lower end thereof, the method of disconnecting and breaking out at least one section of drill pipe from the drill string at a select drill string joint with minimized drilling fluid spillage, it consists of the steps of (a) pulling the drill string out of the wellbore, (b) continuously rotating the drill string with a top drive drilling motor and circulating drilling fluid through the drill string while the drill string ismore » being pulled from the wellbore, (c) stopping the drill string rotation and the drilling fluid circulation when a select drill string joint is above the drilling rig floor, (d) injecting compressed gas into the drill string to displace the drilling fluid in that portion of the drill string above the select drill string joint, (e) stopping the injection of compressed gas into the drill string when the drilling fluid level has fallen below the select drill string joint, and (f) breaking out that portion of the drill string above the selected drill string joint.« less
  • A flow stream of gas in a gaseous drilling fluid circulation system is separated from the main stream, and the separated stream is reduced in temperature prior to being supplied to the bit to be cooled. A heat exchanger is employed to remove heat from the stream, and a second separate stream of gas is directed over the heat exchanger to remove the heat. The temperature of the second cooling stream is reduced by thermodynamic effects. Various drilling tool components may be cooled, including bit bearings, the lubricant seal, and cutter elements of a drag-type drill bit. The seal assemblymore » includes a flange-like projection member and a fluid conducting conduit in thermal transferring relationship with the projection member. Flexible flank members form a movable sealing relationship with the projection member, and the cooled stream is forced through the conduit. The drag-type drill bit includes a number of cooling jets, which direct jets of coated gas from the flow stream into thermal transferring relationship with each of the cutter elements. 23 claims.« less
  • The drilling fluid of deviant composition is subjected to a separating process comprising two stages, including a sieving stage and thereafter a pressure filtration stage, the drilling fluid clinging to the sieve residue obtained in the sieving stage is sucked off by means of a partial-vacuum, the liquid obtained in the separating stage is used for adjusting the desired composition of the drilling fluid in the supply container thereof , and the solid material separated in the separating process is dried and further processed for recovering the solid material to be used in the drilling fluid.