Loss circulation compositions (LCM) having Portland cement clinker

Patent metadata

Field	Value
Publication number	US-10329473-B2
Application number	US-201916259572-A
Country	US
Kind code	B2
Filing date	Jan 28, 2019
Priority date	Jul 20, 2017
Publication date	Jun 25, 2019
Grant date	Jun 25, 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;
cement, wherein the cement comprises API Class G cement;
a carrier fluid; and
an inorganic consolidation activator selected to consolidate the clinker in the composition to form a plug when introduced into a lost circulation zone.

2. 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, or API Class G cement clinker.

3. The LCM composition of claim 1 , wherein the inorganic consolidation activator comprises a silicate salt.

4. The LCM composition of claim 1 , wherein the inorganic consolidation activator comprises at least one of sodium silicate, calcium aluminate, calcium chloride, sodium aluminate, and potassium silicate.

5. The LCM composition of claim 1 , wherein the inorganic consolidation activator comprises an amount in the range of about 1.0 weight of the total weight (w/w %) to about 3.0 w/w %.

6. The LCM composition of claim 1 , wherein the weight ratio of carrier fluid to clinker is 1:1.

7. The LCM composition of claim 1 , wherein the weight ratio of cement clinker to cement is in the range of 60:40 to 70:30.

Assignees

• Saudi Arabian Oil Co
• Saudia Arabian Oil Company

Inventors

• Reddy B Raghava

Classifications

• C04B2103/0062

  Cross-linked polymers · CPC title

• C09K8/426

  for plugging · CPC title

• C04B2103/12

  Set accelerators · CPC title

• C04B16/0633

  Polypropylene · CPC title

• C04B28/06

  Aluminous cements (monolithic refractories or refractory mortars C04B35/66) · CPC title