Oil field biocide composition

• US 4,552,591 A
• Filed: 05/15/1984
• Issued: 11/12/1985
• Est. Priority Date: 05/15/1984
• Status: Expired due to Term

• Current Assignee: Baker Hughes Incorporated (Baker Hughes Company)
• Original Assignee: Petrolite Corporation (Baker Hughes Company)
• Inventors: Millar, Scott W.
• Primary Examiner(s): Hayes, Lorenzo B.
• Application Number:
  US06/610,452
• Time in Patent Office: 546 Days
• Field of Search: 252/8.5 A, 252/8.5 C, 252/8.5 P, 252/8.55 E, 252/8.5 B, 424/270, 106/18.34, 106/18.35, 106/18.33
• US Class Current: 106/18.33
• CPC Class Codes: A01N 2300/00 Combinations or mixtures of active ingredients covered by classes A01N27/00 - A01N65/48 with other active or formulation relevant ingredients, e.g. specific carrier materials or surfactants, covered by classes A01N25/00 - A01N65/48
• CPC Class Codes: A01N 25/12 Powders or granules A01N25/26 takes precedence
• CPC Class Codes: A01N 43/80 five-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,2

Abstract

There is provided a biocide composition for oil field fluid polymers and oil field water polymers. The composition comprises a biocide adsorbed on the surface of a solid, particulate adsorbent. The composition lessens personal and environmental contamination by spilled or splashed liquid biocides.

Claims

1. A method of inhibiting bacterial growth in oil field fluids comprising adding thereto an effective bacterial inhibiting amount of a biocide consisting essentially of a mixture of 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one, the weight ratio of the former to the latter being from about 94 percent to about 64 percent, adsorbed on a solid, particulate adsorbent.

2. Method of claim 1 wherein said fluid is a fracturing fluid.

3. Method of claim 1 wherein said fluid is a drilling fluid.

4. Method of claim 1 wherein said fluid is a water flood system.

5. Method of claim 1 wherein said fluid is an oil field water.