Oilfield nanocomposites

• US 8,096,353 B2
• Filed: 08/26/2008
• Issued: 01/17/2012
• Est. Priority Date: 12/16/2005
• Status: Active Grant

• Current Assignee: Schlumberger Technology Corporation (SLB)
• Original Assignee: Schlumberger Technology Corporation (SLB)
• Inventors: Ver Meer, Melissa
• Primary Examiner(s): Thompson, Kenneth L
• Application Number:
  US12/198,259
• Publication Number:
  US 20090036605A1
• Time in Patent Office: 1,239 Days
• Field of Search: 166/244.1, 166/105, 977/902, 428/402, 524/847, 423/448, 525/55
• US Class Current: 166/244.1
• CPC Class Codes: E21B 33/1208 characterised by the construction of the sealing or packing means E21B33/1277 takes precedence
• CPC Class Codes: Y10S 977/902 Specified use of nanostructure

Abstract

An oilfield apparatus includes an oilfield element made of a composite that includes a matrix material; and a plurality of functionalized graphene sheets dispersed in the matrix material. A method of oilfield operation includes selecting an oilfield apparatus having an oilfield element, wherein at least a portion of the oilfield element is made of a composite comprising a plurality of functionalized graphene sheets dispersed in a matrix material; and using the oilfield apparatus in an oilfield operation, thereby exposing the oilfield element to an oilfield environment. A method for modifying a functionalized graphene sheet includes obtaining the functionalized graphene sheet; and subjecting the functionalized graphene sheet to atom transfer radical polymerization to attach polymers on surfaces of the functionalized graphene sheet. The polymers attached to the surfaces of the functional graphene sheet may comprise co-polymers or magnetic particles.

Claims

1. An oilfield apparatus, comprising:

an oilfield element made of a composite comprising;

a matrix material; and

a plurality of functionalized graphene sheets dispersed in the matrix material, wherein the oilfield apparatus is a downhole tool,

wherein the plurality of functionalized graphene sheets comprise single-layer sheets and multi-layer sheets having a surface area per unit weight of at least 300 m²/g, and

wherein the plurality of functionalized graphene sheets are functionalized with polymers with a polydispersity index such that the polymer hinders folding of the plurality of functionalized graphene sheets.

2. The oilfield apparatus of claim 1, wherein the matrix material is a polymer or an elastomer.

3. The oilfield apparatus of claim 1, wherein the functionalized graphene sheets comprise thermal exfoliated graphite oxide.

4. The oilfield apparatus of claim 1, wherein the polymers are attached to surfaces of the functionalized graphene sheets via atom transfer radical polymerization.

5. The oilfield apparatus of claim 1, wherein the polymers attached to surfaces of the functionalized graphene sheets comprise co-polymers or magnetic particles.

6. The oilfield apparatus of claim 1, wherein the functionalized graphene sheets have an aspect ratio greater than 100.

7. The oilfield apparatus of claim 1, wherein the oilfield element is selected from the group consisting of packer elements, submersible pump motor protector bags, sensor protectors, blow out preventer elements, sucker rods, O-rings, T-rings, gaskets, pump shaft seals, tube seals, valve seals, seals and insulators used in electrical components.

8. An oilfield element made of a composite comprising:

a matrix material; and

a plurality of functionalized graphene sheets dispersed in the matrix material, wherein the oilfield element is configured for use in an oilfield apparatus, wherein the oilfield apparatus is a downhole tool,

wherein the plurality of functionalized graphene sheets comprise single-layer sheets and multi-layer sheets having a surface area per unit weight of at least 300 m²/g, and

wherein the plurality of functionalized graphene sheets are functionalized with polymers with a polydispersity index such that the polymer hinders folding of the plurality of functionalized graphene sheets.

9. The oilfield element of claim 8, wherein the matrix material is a polymer or an elastomer.

10. The oilfield element of claim 8, wherein the functionalized graphene sheets comprise thermal exfoliated graphite oxide.

11. The oilfield element of claim 8, wherein the polymers are attached to surfaces of the functionalized graphene sheets via atom transfer radical polymerization.

12. The oilfield element of claim 8, wherein the polymers attached to surfaces of the functionalized graphene sheets comprise co-polymers or magnetic particles.

13. The oilfield element of claim 8, wherein the functionalized graphene sheets have an aspect ratio larger than 100.

14. The oilfield element of claim 8, wherein the oilfield element is selected from the group consisting of packer elements, submersible pump motor protector bags, sensor protectors, blow out preventer elements, sucker rods, O-rings, T-rings, gaskets, pump shaft seals, tube seals, valve seals, seals and insulators used in electrical components.

15. A method comprising:

selecting an oilfield apparatus having an oilfield element, wherein at least a portion of the oilfield element is made of a composite comprising a plurality of functionalized graphene sheets dispersed in a matrix material, wherein the oilfield apparatus is a downhole tool,

wherein the plurality of functionalized graphene sheets comprise single-layer sheets and multi-layer sheets having a surface area per unit weight of at least 300 m²/g, and

wherein the plurality of functionalized graphene sheets are functionalized with polymers with a polydispersity index such that the polymer hinders folding of the plurality of functionalized graphene sheets; and

using the oilfield apparatus in an oilfield operation, thereby exposing the oilfield element to an oilfield environment.

16. The method of claim 15, wherein the functionalized graphene sheets comprise thermal exfoliated graphite oxide.

17. The method of claim 15, wherein the functionalized graphene sheets have an aspect ratio larger than 100.

18. The method of claim 15, wherein the oilfield element is selected from the group consisting of packer elements, submersible pump motor protector bags, sensor protectors, blow out preventer elements, sucker rods, O-rings, T-rings, gaskets, pump shaft seals, tube seals, valve seals, seals and insulators used in electrical components.