Polyamine fluid loss additive for oil well cements

• US 4,482,383 A
• Filed: 06/09/1983
• Issued: 11/13/1984
• Est. Priority Date: 06/09/1983
• Status: Expired due to Fees

• Current Assignee: BJ Services Company
• Original Assignee: Hughes Tool Company (Baker Hughes Company)
• Inventors: McKenzie, Lee F.
• Primary Examiner(s): Poer, James
• Application Number:
  US06/502,821
• Time in Patent Office: 523 Days
• Field of Search: 106/90, 106/314, 106/315, 166/293
• US Class Current: 106/694
• CPC Class Codes: C04B 2103/46 Water-loss or fluid-loss reducers, hygroscopic or hydrophilic agents, water retention agents
• CPC Class Codes: C04B 22/08 Acids or salts thereof C04B22/0013 takes precedence
• CPC Class Codes: C04B 24/18 Lignin sulfonic acid or derivatives thereof, e.g. sulfite lye
• CPC Class Codes: C04B 24/28 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds C04B24/243 takes precedence
• CPC Class Codes: C04B 28/02 containing hydraulic cements other than calcium sulfates
• CPC Class Codes: C09K 8/46 containing inorganic binders, e.g. Portland cement
• CPC Class Codes: C09K 8/487 Fluid loss control additives; Additives for reducing or preventing circulation loss

Abstract

An aqueous cement composition is shown for cementing the annular space between a pipe and the surrounding bore in a well. The cement composition includes a hydraulic cement, water present in an amount effective to produce a pumpable slurry, a polyamine fluid loss additive, and a sulfonated polymer. By neutralizing the polyamine to a pH of approximately 7, improved free water and fluid loss properties are imparted to the system.

Claims

1. An aqueous cement composition for cementing the annular space between a pipe and the surrounding bore in a well, having zero free water content and fluid loss characteristics of less than about 85 cc/30 minutes at 140°

F., comprising;

a hydraulic cement;

water present in an amount effective to produce a pumpable slurry;

a polyamine fluid loss additive, said polyamine being selected from the group consisting of polyalkylenepolyamines, polyalkylenimines and mixtures thereof, and said polyamine being neutralized in pH within the range of 6 to 8; and

a lignosulfonate retarder material selected from the group consisting of calcium, sodium and ammonium lignosulfonate.

2. A method of cementing the annular space between a pipe and the surrounding bore in a well, comprising:

preparing a pumpable slurry comprising a hydraulic cement, mix water present in an amount effective to produce a pumpable slurry, a lignosulfonate retarder material selected from the group consisting of calcium, sodium and ammonium lignosulfonate, and a polyamine fluid loss additive having a neutral pH, said polyamine fluid loss additive being selected from the group consisting of polyalkylenepolyamines;

polyalkylenimines and mixtures thereof, and said polyamine being neutralized in pH within the range of 6 to 8;

pumping said slurry into said annular space between the pipe and surrounding well bore; and

allowing said slurry to set.