# US 10,870,787 B2 · Date tree trunk-based fibrous loss circulation materials

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- Number: US 10,870,787 B2
- Document ID: US10870787B2
- Status: Granted
- Kind: B2
- Application number: 16/379,420
- Filed: 2019-04-09
- Published: 2019-08-01
- Granted: 2020-12-22
- Earliest claimed: 2016-08-31
- Assignees: Saudi Arabian Oil Company
- Applicants: Saudi Arabian Oil Company
- Inventors: Md Amanullah; Jothibasu Ramasamy
- Web page: https://patentgrep.com/patent/US10870787B2

## CPC

- C09K 8/035: Organic additives
- C09K 8/06: Clay-free compositions (containing inorganic compounds only C09K8/05)
- C09K 8/145: {characterised by the composition of the clay}
- C09K 8/506: containing organic compounds
- C09K 8/516: characterised by their form or by the form of their components, e.g. encapsulated material
- D21B 1/063: {using grinding devices}
- C09K 2208/08: Fiber-containing well treatment fluids
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- D21B: FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT

## Abstract

A date tree trunk-based lost circulation material (LCM) is provided. The date tree trunk LCM includes date tree trunk fibers produced from date tree trunks. The date tree trunks may be obtained from the date tree waste produced by the processing of date trees in the production of date fruits. The date tree trunk LCM may include fibers having lengths less than 8 millimeters (5 mm) and having an aspect ratio range of 10 to 15. Methods of lost circulation control using a date tree trunk LCM and manufacture of a date tree trunk LCM are also provided.

## Claims

### Claim 1

An altered drilling fluid, comprising:
a drilling fluid, wherein the drilling fluid comprises a gel-polymer mud or a volcanic ash-based mud; and
a lost circulation material (LCM), wherein the LCM comprises a plurality of date tree trunk fibers produced from date tree trunks.

### Claim 2 (depends on 1)

The altered drilling fluid of claim 1, wherein the plurality of date tree trunk fibers comprise a concentration of at least 8% by weight of the total weight (w/w %) of the altered drilling fluid.

### Claim 3 (depends on 1)

The altered drilling fluid of claim 1, wherein the plurality of date tree trunk fibers comprise a plurality of untreated date tree trunk fibers.

### Claim 4 (depends on 1)

The altered drilling fluid of claim 1, wherein each of the plurality of date tree trunk fibers has a length less than 8 millimeter (mm).

### Claim 5 (depends on 1)

The altered drilling fluid of claim 1, wherein each of plurality of date tree trunk fibers has an aspect ratio in the range of 10 to 15.

### Claim 6

A method of forming a lost circulation material (LCM), comprising:
chopping a plurality of date tree trunks to produce a plurality of chopped date tree trunks;
washing the plurality of chopped date tree trunks using water;
grinding the chopped date tree trunks to produce a plurality of date tree trunk fibers, the LCM consisting of the date tree trunk fibers, wherein the plurality of date tree trunk fibers comprise a plurality of untreated date tree trunk fibers that are not introduced to an alkali, an acid, a bleaching or an oxidation agent.

### Claim 7 (depends on 6)

The method of claim 6, wherein each of the plurality of date tree trunk fibers has a length less than 8 millimeter (mm).

### Claim 8 (depends on 6)

The method of claim 6, wherein each of plurality of date tree trunk fibers has an aspect ratio in the range of 10 to 15.

### Claim 9

A lost circulation material (LCM) composition, the composition consisting of:
a plurality of date tree trunk fibers produced from a date tree trunk, wherein the plurality of date tree trunk fibers comprise a plurality of untreated date tree trunk fibers that are not introduced to an alkali, an acid, a bleaching or an oxidation agent.

### Claim 10 (depends on 9)

The LCM composition of claim 9, wherein each of the plurality of date tree trunk fibers has a length less than 8 millimeter (mm).

### Claim 11 (depends on 9)

The LCM composition of claim 9, wherein each of plurality of date tree fibers has an aspect ratio in the range of 10 to 15.