Surface fluorinated elastomers for oilfield tools

Patent metadata

Field	Value
Publication number	US-2018100582-A1
Application number	US-201715782488-A
Country	US
Kind code	A1
Filing date	Oct 12, 2017
Priority date	Oct 12, 2016
Publication date	Apr 12, 2018
Grant date	—

Abstract

Surface fluorination treatment of elastomers provides an oil-resistant, mechanically robust, and cost-effective elastomer for use as seals, O-rings, and plugs for oilfield tools. The fluorination treatment of the elastomers provides resistance to oil swelling.

First claim

What is claimed is:

1 . A seal for an oilfield tool, comprising:
an elastomer formed of a resilient material; a fluorinated surface formed by fluorinating the surface of the elastomer.

2 . The seal of claim 1 , wherein the resilient material is a non-fluorinated elastomer, comprising at least one of the following materials: natural rubber, synthetic polyisoprene rubber, butadiene rubber, chloroprene rubber, butyl rubber, nitrile rubber, hydrogenated nitrile rubbers, epichlorohydrin rubber, polyacrylic rubber, silicone rubber, chlorosulfonated polyethylene, ethylene-vinyl acetate, ethylene propylene rubber, styrene butadiene rubber, or ethylene propylene diene terpolymer.

3 . The seal of claim 1 , wherein the thickness of the fluorinated surface ranges from 1 nm to 100 μm.

4 . The seal of claim 1 , wherein the thickness of the fluorinated surface ranges from 1 nm to 10 μm.

5 . The seal of claim 1 , wherein the thickness of the fluorinated surface ranges from 1 nm to 1 μm.

6 . The seal of claim 1 , wherein the thickness of the fluorinated surface ranges from 1 nm to 100 nm.

7 . The seal of claim 1 , wherein the thickness of the fluorinated surface ranges from 1 nm to 10 nm.

8 . The seal of claim 1 , wherein the fluorinated surface can be formed by a method selected from the group consisting of contacting the elastomer with dilute fluorine gas; plasma deposition of oil-repellent layers onto the surface of the elastomer; and vacuum deposition of oil-repellent layers onto the surface of the elastomer.

9 . The seal of claim 1 , wherein the fluorinated surface can be applied together with other surface treatment or process in order to achieve functional performance comprising at least one selected from the group consisting of corrosion resistance, erosion resistance, wear resistance, steam resistance, and coefficient of friction reduction.

10 . The seal of claim 1 , wherein the seals can be used in oilfield tools selected from the group consisting of a flange seal, a thread seal, a gasket, a cap seal, a compression seal, a diaphragm, a diaphragm seal, a ferrofluidic seal, a mechanical packing seal, an o-ring, a piston ring, a glass-to-metal seal, a ceramic-to-metal seal, a heat seal, a hose coupling, a hermetic seal, a grommet, a hydrostatic seal, a hydrodynamic seal, an oil seal ring, a seal protector, a bladder, a bladder tube, a bag, a bellows, a fluid containment chamber, a labyrinth section, a labyrinth protector, a labyrinth seal, a labyrinth tube, a lid seal, a face seal, a plug, a radial shaft seal, a split seal, a wiper seal, a dry gas seal, a lip seal, a cable sheath, a cable armor, Christmas tree, Blowout preventer, pipeline liner, O-ring, gasket, generator, pump, valves, joint, gauge, transmitter.

11 . The seal of claim 2 , herein the seals can be used in oilfield tools selected from the group consisting of a flange seal, a thread seal, a gasket, a cap seal, a compression seal, a diaphragm, a diaphragm seal, a ferrofluidic seal, a mechanical packing seal, an o-ring, a piston ring, a glass-to-metal seal, a ceramic-to-metal seal, a heat seal, a hose coupling, a hermetic seal, a grommet, a hydrostatic seal, a hydrodynamic seal, an oil seal ring, a seal protector, a bladder, a bladder tube, a bag, a bellows, a fluid containment chamber, a labyrinth section, a labyrinth protector, a labyrinth seal, a labyrinth tube, a lid seal, a face seal, a plug, a radial shaft seal, a split seal, a wiper seal, a dry gas seal, a lip seal, a cable sheath, a cable armor, Christmas tree, Blowout preventer, pipeline liner, O-ring, gasket, generator, pump, valves, joint, gauge, transmitter.

12 . The seal of claim 3 , wherein the seals can be used in oilfield tools selected from the group consisting of a flange seal, a thread seal, a gasket, a cap seal, a compression seal, a diaphragm, a diaphragm seal, a ferrofluidic seal, a mechanical packing seal, an o-ring, a piston ring, a glass-to-metal seal, a ceramic-to-metal seal, a heat seal, a hose coupling, a hermetic seal, a grommet, a hydrostatic seal, a hydrodynamic seal, an oil seal ring, a seal protector, a bladder, a bladder tube, a bag, a bellows, a fluid containment chamber, a labyrinth section, a labyrinth protector, a labyrinth seal, a labyrinth tube, a lid seal, a face seal, a plug, a radial shaft seal, a split seal, a wiper seal, a dry gas seal, a lip seal, a cable sheath, a cable armor, Christmas tree, Blowout preventer, pipeline liner, O-ring, gasket, generator, pump, valves, joint, gauge, transmitter.

13 . The seal of claim 4 , wherein the seals can be used in oilfield tools selected from the group consisting of a flange seal, a thread seal, a gasket, a cap seal, a compression seal, a diaphragm, a diaphragm seal, a ferrofluidic seal, a mechanical packing seal, an o-ring, a piston ring, a glass-to-metal seal, a ceramic-to-metal seal, a heat seal, a hose coupling, a hermetic seal, a grommet, a hydrostatic seal, a hydrodynamic seal, an oil seal ring, a seal protector, a bladder, a bladder tube, a bag, a bellows, a fluid containment chamber, a labyrinth section, a labyrinth protector, a labyrinth seal, a labyrinth tube, a lid seal, a face seal, a plug, a radial shaft seal, a split seal, a wiper seal, a dry gas seal, a lip seal, a cable sheath, a cable armor, Christmas tree, Blowout preventer, pipeline liner, O-ring, gasket, generator, pump, valves, joint, gauge, transmitter.

14 . The seal of claim 5 , wherein the seals can be used in oilfield tools selected from the group consisting of a flange seal, a thread seal, a gasket, a cap seal, a compression seal, a diaphragm, a diaphragm seal, a ferrofluidic seal, a mechanical packing seal, an o-ring, a piston ring, a glass-to-metal seal, a ceramic-to-metal seal, a heat seal, a hose coupling, a hermetic seal, a grommet, a hydrostatic seal, a hydrodynamic seal, an oil seal ring, a seal protector, a bladder, a bladder tube, a bag, a bellows, a fluid containment chamber, a labyrinth section, a labyrinth protector, a labyrinth seal, a labyrinth tube, a lid seal, a face seal, a plug, a radial shaft seal, a split seal, a wiper seal, a dry gas seal, a lip seal, a cable sheath, a cable armor, Christmas tree, Blowout preventer, pipeline liner, O-ring, gasket, generator, pump, valves, joint, gauge, transmitter.

15 . The seal of claim 6 , wherein the seals can be used in oilfield tools selected from the group consisting of a flange seal, a thread seal, a gasket, a cap seal, a compression seal, a diaphragm, a diaphragm seal, a ferrofluidic seal, a mechanical packing seal, an o-ring, a piston ring, a glass-to-metal seal, a ceramic-to-metal seal, a heat seal, a hose coupling, a hermetic seal, a grommet, a hydrostatic seal, a hydrodynamic seal, an oil seal ring, a seal protector, a bladder, a bladder tube, a bag, a bellows, a fluid containment chamber, a labyrinth section, a labyrinth protector, a labyrinth seal, a labyrinth tube, a lid seal, a face seal, a plug, a radial shaft seal, a split seal, a wiper seal, a dry gas seal, a lip seal, a cable sheath, a cable armor, Christmas tree, Blowout preventer, pipeline liner, O-ring, gasket, generator, pump, valves, joint, gauge, transmitter.

16 . A method of providing a seal in an oilfield tool comprising
obtaining the seal of claim 1 ; and installing the seal of claim 1 in the oilfield tool.

17 . A method of manufacturing the seal of claim 1 , wherein the fluorinated surface is formed by a method selected from the group consisting of contacting the elastomer with dilute fluorine gas; plasma deposition of oil-repellent layers onto the surface of the el

Assignees

• Cnpc Usa Corp

Inventors

• Li Zhuo
• Xu Jianhui

Classifications

• C08L7/00 Primary

  Compositions of natural rubber · CPC title

• F16J15/00 Primary

  Sealings · CPC title

• C08L19/00

  Compositions of rubbers not provided for in groups C08L7/00 - C08L17/00 · CPC title

• C08L11/00

  Compositions of homopolymers or copolymers of chloroprene · CPC title

• F16J15/102

  characterised by material · CPC title