System and Method of Reducing Erosion in Frac Applications

Patent metadata

Field	Value
Publication number	US-2016168970-A1
Application number	US-201514968576-A
Country	US
Kind code	A1
Filing date	Dec 14, 2015
Priority date	Dec 16, 2014
Publication date	Jun 16, 2016
Grant date	—

Abstract

A well fracturing component has a steel body with at least one passage and a connector for connecting the body to a source of pressurized frac fluid containing particulates for injecting into a well. An epoxy-based primer layer bonds to a side wall of the passage. A siloxane topcoat layer bonds to the primer layer. The topcoat layer has a greater thickness than the primer layer. The topcoat layer has less hardness than the primer layer and loss hardness than the body.

First claim

1 . A well fracturing apparatus, comprising:
a body having at least one passage and a connector for connecting to a source of pressurized frac fluid containing particulates for injecting into a well; an epoxy primer layer bonded to a side wall of the passage; and a topcoat layer bonded lo the primer layer, the topcoat layer comprising a polymer.

2 . The apparatus according to claim 1 , wherein:
the topcoat layer has a greater thickness than the primer layer.

3 . The apparatus according to claim 1 , wherein:
the primer layer has a thickness in a range from 0.001 to 0.005 inch.

4 . The apparatus according to claim 1 , wherein:
the topcoat layer has a thickness in a range from 0.005 to 0.050 inch.

5 . The apparatus according to claim 1 , wherein:
the topcoat layer has less hardness than the primer layer.

6 . The apparatus according to claim 1 , wherein:
the body is formed of a steel; and the topcoat layer has less hardness than the body.

7 . The apparatus according to claim 1 , wherein:
the topcoat comprises siloxane.

8 . The apparatus according to claim 1 , wherein:
the topcoat comprises a nano-composite siloxane-based (Si—O—Si) material.

9 . The apparatus according to claim 1 , wherein:
the body has a plurality of the passages that intersect each other; and the primer layer and the topcoat layer are bonded to side walls of at least some of the passages that intersect each other.

10 . A well fracturing apparatus, comprising;
a steel body having at least one passage and a connector for connecting the body to a source of pressurized frac fluid containing particulates for injecting into a well; an epoxy-based primer layer bonded to a side wall of the passage; and a topcoat layer bonded to the primer layer, the topcoat layer comprising siloxane.

11 . The apparatus according to claim 10 , wherein;
the topcoat layer has a greater thickness than the primer layer.

12 . The apparatus according to claim 10 , wherein:
the primer layer has a thickness in a range from 0.001 to 0.005 inch.

13 . The apparatus according to claim 10 , wherein:
the topcoat layer has a thickness in a range from 0.005 to 0.050 inch.

14 . The apparatus according to claim 10 , wherein:
the topcoat layer has less hardness than the primer layer and less hardness than the body.

15 . The apparatus according to claim 10 , wherein:
the body has a plurality of the passages dial intersect each other; and the primer layer and the topcoat layer are bonded to side walls of at least some of the passages that intersect each other.

16 . The apparatus according to claim 11 , wherein the body comprises:
a multi-inlet hub; and said at least one of the passages comprising an outlet and a plurality of inlets that intersect the outlet.

17 . A method for reducing erosion in a passage of a well frac component due to particulate laden frac fluid being pumped through the passage, the method comprising:
spraying an epoxy primer to a side wall of the passage and allowing the epoxy primer to cure to form a primer layer; then spraying a polymer onto the primer layer and allowing the polymer to cure to form a topcoat layer.

18 . The method according to claim 17 , wherein:
spraying the polymer onto the primer layer comprises providing the topcoat layer with a greater thickness man the primer layer.

19 . The method according to claim 17 , wherein:
selecting the epoxy primer and the polymer such that the topcoat layer has a lesser hardness than the primer layer and less than the side wall of the component.

20 . The method according to claim 17 , wherein:
the component is formed of a steel; and the polymer of the topcoat layer comprises siloxane.

Assignees

• Ge Oil & Gas Pressure Control Lp

Inventors

• Kajaria Saurabh
• Saleem Fauad

Classifications

• C09D5/002

  Priming paints (C09D5/08 takes precedence) · CPC title

• C09D163/00

  Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins · CPC title

• B05D1/02

  performed by spraying · CPC title

• C09D183/04

  Polysiloxanes · CPC title

• E21B43/26 Primary

  by forming crevices or fractures · CPC title