Loss circulation compositions (LCM) having portland cement clinker

Patent metadata

Field	Value
Publication number	US-10414967-B2
Application number	US-201815962720-A
Country	US
Kind code	B2
Filing date	Apr 25, 2018
Priority date	Jul 20, 2017
Publication date	Sep 17, 2019
Grant date	Sep 17, 2019

Abstract

Portland cement clinker LCMs that include Portland cement clinker to mitigate or prevent lost circulation in a well are provided. A Portland cement clinker LCM may include Portland cement clinker, Portland cement, a carrier fluid, and an inorganic consolidation activator. Another Portland cement clinker LCM may include Portland cement clinker and a crosslinked fluid, such as a polyuronide crosslinked via calcium ions or a polysaccharide crosslinked via divinyl sulfone. Yet another Portland cement clinker LCM may include Portland cement clinker and polymer fibers or particulate glass. Methods of lost circulation control using a Portland cement clinker LCM are also provided.

First claim

What is claimed is:

1. A lost circulation material (LCM) composition, comprising:
Portland cement clinker, wherein the Portland cement clinker consists of non-hydraulic, non-cementiceous unground Portland cement clinker particles;
a carrier fluid;
a plurality of polymer fibers; and
cement; wherein the cement comprises API Class G cement.

2. The LCM composition of claim 1 , wherein the plurality of polymer fibers comprises a plurality of polypropylene fibers.

3. The LCM composition of claim 1 , wherein the plurality of polymer fibers each have a length in the range of 1 millimeters (mm) to 6 millimeters.

4. The LCM composition of claim 1 , wherein the plurality of polymer fibers comprises a plurality of polyacrylonitrile fibers.

5. The LCM composition of claim 1 , where the plurality of polymer fibers comprise an amount in the range of 0.25 weight of the total weight (w/w %) to 1.0 w/w %.

6. The LCM composition of claim 1 , wherein the carrier fluid comprises at least one of diutan gum, xanthan gum, and welan gum.

7. The LCM composition of claim 1 , wherein the Portland cement clinker comprises ASTM International Type I cement clinker, ASTM International Type V cement clinker, API Class A cement clinker API Class G cement clinker.

8. The LCM composition of claim 1 , wherein the weight ratio of cement clinker to cement is in the range of 60:40 to 90:10.

Assignees

• Saudi Arabian Oil Co

Inventors

• Reddy B Raghava

Classifications

• C04B2103/0062

  Cross-linked polymers · CPC title

• C09K8/506

  containing organic compounds · CPC title

• C04B28/26

  Silicates of the alkali metals · CPC title

• C09K8/516

  characterised by their form or by the form of their components, e.g. encapsulated material · CPC title

• C09K8/32

  Non-aqueous well-drilling compositions, e.g. oil-based · CPC title