Loss circulation material for seepage to moderate loss control

Patent metadata

Field	Value
Publication number	US-10844265-B2
Application number	US-201916244669-A
Country	US
Kind code	B2
Filing date	Jan 10, 2019
Priority date	Dec 20, 2016
Publication date	Nov 24, 2020
Grant date	Nov 24, 2020

Abstract

A two-component lost circulation material (LCM) is provided. The two-component LCM includes a polymer component and a sodium hydroxide component. The polymer component may include may include a drilling fluid, a fibrous material such as polypropylene fibers, and an acrylic polymer, such as a 30% acrylic polymer solution. The sodium hydroxide component may include water and sodium hydroxide. The sodium hydroxide component is introduced to contact the polymer component to form the two-component LCM. Methods of lost circulation control and manufacture of a two-component LCM are also provided.

First claim

What is claimed is:

1. A lost circulation material (LCM) composition, comprising:
a first component, comprising:
a drilling fluid, wherein the drilling fluid is selected from the group consisting of a bentonite mud, a potassium chloride (KCl) polymer mud, and a weighted barite mud;
polypropylene fibers; and
an acrylic polymer solution comprising sodium polycarboxylate in the range of about 29% to about 31% and water in the range of about 69% to about 71%, wherein the polypropylene fibers are in the range of 0.03 grams/milliliter of the acrylic polymer solution to 0.3 grams/milliliter of the acrylic polymer solution;

a second component comprising sodium hydroxide and water, the second component comprises at least 20% sodium hydroxide by weight of the total weight, wherein
the bentonite mud comprises water, bentonite, caustic soda, and soda ash;
the potassium chloride (KCl) polymer mud comprises water, caustic soda, soda ash, bentonite, a polyanionic cellulose additive, and xanthan gum; and
the barite mud comprises water, xanthan gum, potato starch, barite, and caustic soda.

2. The LCM composition of claim 1 , wherein the LCM composition consists essentially of the first component and the second component.

3. The LCM composition of claim 1 , wherein the second component consists of sodium hydroxide and water.

Assignees

• Saudi Arabian Oil Co

Inventors

• Ramasamy Jothibasu
• Amanullah Md

Classifications

• C09K8/145

  characterised by the composition of the clay · CPC title

• C09K8/035 Primary

  Organic additives · CPC title

• C09K2208/08

  Fiber-containing well treatment fluids · CPC title

• E21B21/003

  Means for stopping loss of drilling fluid (plastering the borehole wall E21B33/138) · CPC title

• C09K8/5083

  obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title