Methods of using a degradable component in a wellbore and related systems and methods of forming such components

Patent metadata

Field	Value
Publication number	US-9856411-B2
Application number	US-201414526309-A
Country	US
Kind code	B2
Filing date	Oct 28, 2014
Priority date	Oct 28, 2014
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

Methods of using a component in a subterranean wellbore include positioning a component including a degradable thermoset polymer material in a wellbore location, obstructing flow with the component, exposing the component to an acidic solution to degrade the selectively degradable thermoset polymer material and to remove the component from the wellbore location, and flowing a fluid through the wellbore location where the component was positioned. Methods of forming a component of a wellbore system include forming at least a portion of the component to comprise a degradable thermoset polymer material. Wellbore systems include at least one component including a selectively degradable thermoset polymer material. The selectively degradable thermoset polymer material may be a polyhexahydrotriazine (“PHT”) material.

First claim

What is claimed is:

1. A method of using a component in a subterranean wellbore, the method comprising:
positioning a component comprising a degradable thermoset polymer in a wellbore location, the degradable thermoset polymer comprising a polyhexahydrotriazine material, the polyhexahydrotriazine material being mechanically stable when exposed to wellbore temperatures in a range between 50° C. and 220° C., inclusive, and at wellbore fluid pressures equal to or greater than about 3,000 psi;
obstructing, with the component, flow of a fluid through the wellbore location without degrading the degradable thermoset polymer;
exposing the component to an acidic solution to degrade the degradable thermoset polymer and to remove the component from the wellbore location; and
flowing a fluid through the wellbore location where the component was positioned.

2. The method of claim 1 , wherein positioning a component in a wellbore location comprises positioning a drop ball against a drop ball seat.

3. The method of claim 1 , wherein exposing the component to an acidic solution comprises exposing the component to the acidic solution exhibiting a pH of less than about 2.0.

4. The method of claim 1 , wherein flowing a fluid through the wellbore location comprises flowing a fluid selected from the group consisting of water, salt water, a hydrocarbon fluid, a hydraulic fracturing fluid, drilling mud, a gravel slurry, completion fluid, and gas for a gas lift operation.

5. The method of claim 1 , further comprising, prior to exposing the component to an acidic solution, exposing the component in the wellbore location to at least one of an elevated temperature of at least about 50° C. and an elevated pressure of at least about 3,000 psi.

6. The method of claim 5 , further comprising exposing the component in the wellbore location to at least one of an elevated temperature of at least about 100° C. and an elevated pressure of at least about 5,000 psi.

7. The method of claim 1 , wherein the component is selected from the group consisting of a drop ball, a drop ball seat, an isolation plug, a valve plug, an expandable reamer, a stabilizer, a perforation gun body, and a gravel-pack screen.

8. A wellbore system, comprising:
at least one component comprising a selectively degradable thermoset polymer material, wherein the selectively degradable thermoset polymer material comprises a polyhexahydrotriazine material, the polyhexahydrotriazine material being mechanically stable when exposed to wellbore temperatures in a range between 50° C. and 220° C., inclusive, and at wellbore fluid pressures equal to or greater than about 3,000 psi.

9. The wellbore system of claim 8 , wherein the polyhexahydrotriazine material is formed of materials comprising a diamine material selected from the group consisting of 4,4′-oxydianiline, 4,4′-(9-fluorenylidene)dianiline, bis-(3-aminophenyl)-methanone, 4,4′-(1,3-phenylenedioxy)dianiline, 4,4′-(4,4′-isopropylidenediphenyl-1,1′-diyldioxy)dianiline, and 4,4′-methylenedianiline.

10. The wellbore system of claim 8 , wherein the at least one component is selected from the group consisting of a drop ball, a drop ball seat, an isolation plug, a valve plug, an expandable reamer, a stabilizer, a perforation gun body, and a gravel-pack screen.

11. The wellbore system of claim 8 , wherein the at least one component consists essentially of the selectively degradable thermoset polymer material.

12. The wellbore system of claim 8 , wherein the selectively degradable thermoset polymer material comprises at least one filler material.

13. The wellbore system of claim 12 , wherein the at least one filler material is selected from the group consisting of graphene, graphene oxide, graphite, carbon nanotubes, carbon fibers, glass fibers, nylon particles, controlled electrolytic metallic particles, molybdenum sulfide, water-soluble poly(vinyl alcohol) fibers, and active metal particles or fibers.

14. The wellbore system of claim 8 , wherein the selectively degradable thermoset polymer material is selectively degradable by exposure to an acidic solution having a pH of less than about 2.0.

Assignees

• Baker Hughes Inc

Inventors

• Sadana Anil K
• Potts Jeffrey R

Classifications

• C09K2208/08

  Fiber-containing well treatment fluids · CPC title

• E21B33/12

  Packers; Plugs (used for cementing E21B33/134, E21B33/16) · CPC title

• C09K2208/10

  Nanoparticle-containing well treatment fluids · CPC title

• E21B31/002

  Destroying the objects to be fished, e.g. by explosive means · CPC title

• C09K8/508 Primary

  macromolecular compounds {(C09K8/512 takes precedence)} · CPC title