# US 8,770,304 B2 · Open-hole wellbore lining

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- Number: US 8,770,304 B2
- Document ID: US8770304B2
- Status: Granted
- Kind: B2
- Application number: 13/051,966
- Filed: 2011-03-18
- Published: 2011-07-28
- Granted: 2014-07-08
- Earliest claimed: 2007-10-03
- Assignees: Schlumberger Technology Corporation
- Applicants: Louise Bailey; John Cook; Armelle Payen; Sylvie Daniel; Mickael Allouche
- Inventors: Louise Bailey; John Cook; Armelle Payen; Sylvie Daniel; Mickael Allouche
- Web page: https://patentgrep.com/patent/US8770304B2

## CPC

- C09K 8/508: macromolecular compounds {(C09K8/512 takes precedence)}
- C09K 8/516: characterised by their form or by the form of their components, e.g. encapsulated material
- E21B 33/138: Plastering the borehole wall; Injecting into the formation
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

## Abstract

Embodiments of the present invention provide compositions and methods for lining a wellbore. In certain aspects, the compositions and methods comprise providing a fluid composition that is solidifiable or gellable on exposure to actinic radiation of a predetermined wavelength at the wall of open-hole wellbore and providing actinic radiation at the predetermined wavelength to solidify or gel the composition. The predetermined wavelength lies in a range from 100 nm to 1500 nm.

## Claims

### Claim 1

A wellbore fluid comprising:
a fluid; and
a composition comprising:
a pre-polymer, wherein the pre-polymer is selected from the group consisting of substituted C2-5 alkenyl and substituted epoxidyl; and
a photoinitiator, wherein the photoinitiator is selected from cation photoinitiator or free radical photoinitiator;
wherein upon exposure to actinic radiation of a predetermined wavelength in the range of 100 nm to 1500 nm, the composition solidifies or gels to become impermeable to fluids.

### Claim 2 (depends on 1)

The wellbore fluid of claim 1, wherein the substituted C2-5 alkenyl is substituted C2-5 alk-1-enyl.

### Claim 3 (depends on 1)

The wellbore fluid of claim 1, wherein the C2-5 alkenyl is substituted with one or more groups independently selected from —R, —OR, and —C(═O)OR, where R is selected from halo, hydroxyl, C1-10 alkyl, C1-10 aryl, and C3-20 heterocyclyl.

### Claim 4 (depends on 1)

The wellbore fluid of claim 1, wherein the C2-5 alkenyl is substituted with a substituent comprising C2-5 alkenyl, and the epoxidyl is substituted with a substituent comprising epoxidyl.

### Claim 5 (depends on 1)

The wellbore fluid of claim 1, wherein the pre-polymer comprises a functional group selected from vinyl group and an epoxidyl group.

### Claim 6 (depends on 1)

The wellbore fluid of claim 1, wherein the pre-polymer is a C2-5 alk-1-enyl substituted with one or more groups independently selected from —R, —OR, and —C(═O)OR, where R is selected from halo, hydroxyl, C1-10 alkyl, C1-10 aryl, and C3-20 heterocyclyl.

### Claim 7 (depends on 1)

The wellbore fluid of claim 1, wherein the pre-polymer comprises a plurality of alkenyl groups.

### Claim 8 (depends on 1)

The wellbore fluid of claim 1, wherein the pre-polymer comprises a plurality of epoxidyl groups.

### Claim 9 (depends on 1)

The wellbore fluid of claim 1, wherein the free radical photoinitiator is selected from type I cleavable photoinitiators and type II hydrogen abstraction or electron transfer photoinitiators.

### Claim 10 (depends on 1)

The wellbore fluid of claim 1, wherein the cation photoinitiator is a photoacid generator.

### Claim 11

A composition comprising:
a filtercake; and
a solidifiable or gellable fluid, wherein the solidifiable or gellable fluid forms part of the filter cake, and wherein the solidifiable or gellable fluid comprises:
a pre-polymer, wherein the pre-polymer is selected from the group consisting of substituted C2-5 alkenyl and substituted epoxidyl; and
a photoinitiator, wherein the photoinitiator is selected from cation photoinitiator or free radical photoinitiator;
wherein upon exposure to actinic radiation of a predetermined wavelength in the range of 100 nm to 1500 nm, the composition solidifies or gels to become impermeable to fluids.

### Claim 12 (depends on 11)

The composition of claim 11, wherein the substituted C2-5 alkenyl is substituted C2-5 alk-1-enyl.

### Claim 13 (depends on 11)

The composition of claim 11, wherein the C2-5 alkenyl is substituted with one or more groups independently selected from —R, —OR, and —C(═O)OR, where R is selected from halo, hydroxyl, C1-10 alkyl, C1-10 aryl, and C3-20 heterocyclyl.

### Claim 14 (depends on 11)

The composition of claim 11, wherein the C2-5 alkenyl is substituted with a substituent comprising C2-5 alkenyl, and the epoxidyl is substituted with a substituent comprising epoxidyl.

### Claim 15 (depends on 11)

The composition of claim 11, wherein the pre-polymer comprises a functional group selected from vinyl group and an epoxidyl group.

### Claim 16 (depends on 11)

The composition of claim 11, wherein the pre-polymer is a C2-5 alk-1-enyl substituted with one or more groups independently selected from —R, —OR, and —C(═O)OR, where R is selected from halo, hydroxyl, C1-10 alkyl, C1-10 aryl, and C3-20 heterocyclyl.

### Claim 17 (depends on 11)

The composition of claim 11, wherein the pre-polymer comprises a plurality of alkenyl groups.

### Claim 18 (depends on 11)

The composition of claim 11, wherein the pre-polymer comprises a plurality of epoxidyl groups.

### Claim 19 (depends on 11)

The composition of claim 11, wherein the free radical photoinitiator is selected from type I cleavable photoinitiators and type II hydrogen abstraction or electron transfer photoinitiators.

### Claim 20 (depends on 11)

The composition of claim 11, wherein the cation photoinitiator is a photoacid generator.