# US 10,370,580 B2 · Loss circulation compositions (LCM) having portland cement clinker

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- Number: US 10,370,580 B2
- Document ID: US10370580B2
- Status: Granted
- Kind: B2
- Application number: 15/962,720
- Filed: 2018-04-25
- Published: 2019-01-24
- Granted: 2019-08-06
- Earliest claimed: 2017-07-20
- Assignees: Saudi Arabian Oil Company
- Applicants: Saudi Arabian Oil Company
- Inventors: B. Raghava Reddy
- Web page: https://patentgrep.com/patent/US10370580B2

## CPC

- C09K 8/487: Fluid loss control additives; Additives for reducing or preventing circulation loss
- C04B 14/045: {Alkali-metal containing silicates, e.g. petalite (waterglass C04B12/04)}
- C04B 14/22: Glass {; Devitrified glass}
- C04B 14/42: Glass
- C04B 16/0633: {Polypropylene}
- C04B 16/0658: {Polyacrylonitrile}
- C04B 22/0093: {Aluminates}
- C04B 22/124: {Chlorides of ammonium or of the alkali or alkaline earth metals, e.g. calcium chloride}
- C04B 26/28: Polysaccharides or derivatives thereof
- C04B 26/285: {Cellulose or derivatives thereof (C04B26/24 takes precedence)}
- C04B 28/04: Portland cements
- C04B 28/06: Aluminous cements (monolithic refractories or refractory mortars C04B35/66)
- C04B 28/26: Silicates of the alkali metals
- C09K 8/08: containing natural organic compounds, e.g. polysaccharides, or derivatives thereof
- C09K 8/12: containing synthetic organic macromolecular compounds or their precursors
- C09K 8/32: Non-aqueous well-drilling compositions, e.g. oil-based
- C09K 8/426: {for plugging}
- C09K 8/506: containing organic compounds
- C09K 8/508: macromolecular compounds {(C09K8/512 takes precedence)}
- C09K 8/5045: {containing inorganic compounds}
- C09K 8/514: of natural origin, e.g. polysaccharides, cellulose (C09K8/512 takes precedence)
- C09K 8/516: characterised by their form or by the form of their components, e.g. encapsulated material
- E21B 21/003: {Means for stopping loss of drilling fluid (plastering the borehole wall E21B33/138)}
- E21B 33/138: Plastering the borehole wall; Injecting into the formation
- C04B 2103/0028: {according to API}
- C04B 2103/0062: {Cross-linked polymers}
- C04B 2103/0067: {the ingredients being formed in situ by chemical reactions or conversion of one or more of the compounds of the composition}
- C04B 2103/12: Set accelerators
- C09K 2208/08: Fiber-containing well treatment fluids
- C04B 24/38: Polysaccharides or derivatives thereof {(C04B24/243 takes precedence)}
- C04B 7/32: Aluminous cements
- C04B 12/04: Alkali metal or ammonium silicate cements {; Alkyl silicate cements; Silica sol cements; Soluble silicate cements (alkali metal silicates per se, their preparation C01B33/32; ammonium silicates per se, their preparation C01C1/00)}
- C04B 16/06: fibrous
- C04B 7/02: Portland cement
- C04B 20/0076: {characterised by the grain distribution}
- C04B 2103/001: {Alkaline earth metal or Mg-compounds}
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

## 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.

## Claims

### Claim 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.

### Claim 2 (depends on 1)

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

### Claim 3 (depends on 1)

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.

### Claim 4 (depends on 1)

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

### Claim 5 (depends on 1)

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 %.

### Claim 6 (depends on 1)

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

### Claim 7 (depends on 1)

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.

### Claim 8 (depends on 1)

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.