Stable suspension of hydrocolloids and superplasticizer

• US 6,309,455 B1
• Filed: 08/21/2000
• Issued: 10/30/2001
• Est. Priority Date: 06/07/1995
• Status: Expired due to Term

• Current Assignee: Cp Kelco (JM Huber Corporation)
• Original Assignee: Cp Kelco (JM Huber Corporation)
• Inventors: Rakitsky, Walter, Dial, Harold, Skaggs, Bryan
• Primary Examiner(s): BRUNSMAN, DAVID M
• Application Number:
  US09/642,414
• Time in Patent Office: 435 Days
• Field of Search: 106/205.6, 106/724, 106/725, 106/726, 106/730, 106/804, 106/805, 106/802, 106/809, 106/172.1, 106/191.1, 106/205.01, 106/206.6, 106/287.32, 106/287.35, 523/131, 524/4, 524/5, 507/103, 507/108, 507/110, 507/114, 507/120, 507/124, 507/135
• US Class Current: 106/205.6
• CPC Class Codes: C04B 14/104 Bentonite, e.g. montmorillonite
• CPC Class Codes: C04B 14/106 Kaolin
• CPC Class Codes: C04B 20/026 Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
• CPC Class Codes: C04B 2103/32 Superplasticisers
• CPC Class Codes: C04B 24/18 Lignin sulfonic acid or derivatives thereof, e.g. sulfite lye
• CPC Class Codes: C04B 24/22 Condensation or polymerisation products thereof
• CPC Class Codes: C04B 24/26 obtained by reactions only involving carbon-to-carbon unsaturated bonds C04B24/243 takes precedence
• CPC Class Codes: C04B 24/38 Polysaccharides or derivatives thereof C04B24/243 takes precedence
• CPC Class Codes: C04B 28/02 containing hydraulic cements other than calcium sulfates
• CPC Class Codes: C04B 40/0035 Processes characterised by the absence of a mechanical mixing step, e.g. "no-mix" processes
• CPC Class Codes: C04B 40/0039 Premixtures of ingredients
• CPC Class Codes: C09K 8/04 Aqueous well-drilling compositions
• CPC Class Codes: C09K 8/206 Derivatives of other natural products, e.g. cellulose, starch, sugars
• CPC Class Codes: C09K 8/22 Synthetic organic compounds
• CPC Class Codes: C09K 8/46 containing inorganic binders, e.g. Portland cement

Abstract

The present invention comprises a stable hydrocolloid composition in which preferably welan gum is uniformly dispersed in a superplasticizer solution such as sulfonated naphthalene, sulfonated melamine, modified lignosulfate, their derivatives and mixtures thereof. The solution is wet milled to form an extremely fine particle size distribution of the gum. The composition is rapidly hydratable and useful as a stabilizing additive in many cement and drilling fluid applications.

Claims

1. A stabilized suspension comprising a hydrocolloid uniformly dispersed in a superplasticizer solution, wherein said hydrocolloid and superplasticizer are present in a weight ratio of from about 1:

1 to about 1;

30 and the hydrocolloid and superplasticizer are milled together in a particle range of from about 3 μ

m to about 500 μ

m.

2. The stabilized suspension of claim 1 wherein said hydrocolloid is selected from the group consisting of welan gum, hydroxypropylmethyl cellulose, polyvinyl alcohol, hydroxyethyl cellulose, polyacrylamide and mixtures thereof.

3. The stabilized suspension of claim 2 wherein said hydrocolloid is welan gum.

4. The stabilized suspension of claim 1 wherein said superplasticizer is selected from the group consisting of sulfonated napthalene, sulfonated melamine, modified lignosulfate, their derivatives and mixtures thereof.

5. The stabilized suspension of claim 1 further comprising bentonite, kaolin or a bentonite extender.

6. A masonry grout comprising a stabilized suspension according to claim 1.

7. The masonry grout of claim 6 wherein said hydrocolloid is selected from the group consisting of welan gum, hydroxypropylmethyl cellulose, hydroxyethyl cellulose, polyvinyl alcohol, polyacrylamide and mixtures thereof.

8. The masonry group of claim 7 wherein said hydrocolloid is welan gum.

9. The masonry grout of claim 6 wherein said superplasticizer is selected from the group consisting of sulfonated napthalene, sulfonated melamine, modified lignosulfate, their derivatives and mixtures thereof.

10. The masonry grout of claim 6 further comprising bentonite, kaolin or a bentonite extender.

11. An anti-washout composition for flushing subterranean oil formations comprising a stabilized suspension according to claim 1.

12. The anti-washout composition of claim 11 wherein said hydrocolloid is selected from the group consisting of welan gum, hydroxypropylmethyl cellulose, hydroxyethyl cellulose, polyvinyl alcohol, polyacrylamide and mixtures thereof.

13. The anti-washout composition of claim 12 wherein said hydrocolloid is welan gum.

14. The anti-washout composition of claim 11 wherein said superplasticizer is selected from the group consisting of sulfonated naphthalene, sulfonated malamine, modified lignosulfate, their derivatives and mixtures thereof.

15. The anti-washout composition of claim 11 further comprising bentonite, kaolin or a bentonite extender.