System and method for producing homogenized oilfield gels

Patent metadata

Field	Value
Publication number	US-9764497-B2
Application number	US-201213705946-A
Country	US
Kind code	B2
Filing date	Dec 5, 2012
Priority date	Dec 5, 2011
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

A system for producing homogenized oil field gel including a power unit, a control system, a feed tank, a hopper, and a piping assembly that includes inlet and outlet manifolds, centrifugal pumps, and metering devices for filling the feed tank and handling a discharge of oilfield gel. The system further includes a powder hydration component and liquid chemical equipment. The method for producing homogenized oil field gel includes a guar powder procedure including a controlled sequence for starting and stopping a venturi mixer in a hydration unit. The method for producing homogenized oil field gel further includes a liquefied gel concentrate procedure including a metering and chemical injection procedure for mixing a liquefied gel concentrate.

First claim

I claim:

1. A system for producing oil field gel comprising:
a power unit comprising an engine and pumps;
a feed tank comprising a water chamber and at least one gel chamber;
a hopper;
a first piping assembly comprising inlet and outlet manifolds, a first pump, a water supply pipe, and a pressure gauge for handling a discharge of oilfield gel;
a second piping assembly comprising an inlet pipe, a second pump, and a metering device for filling the feed tank; and
a powder hydration component comprising a venturi mixing system;
wherein the water supply pipe of the first piping assembly extends into the water chamber for extracting water from the water chamber, the inlet pipe of the second piping assembly extends into the water chamber to provide water for filling the tank, and the outlet manifold of the first piping assembly is configured to discharge oilfield gel into the at least one gel chamber, and
wherein the hopper provides powder to the powder hydration component, and the powder hydration component is fluidly connected to the first piping assembly.

2. The system according to claim 1 , wherein the power unit comprises a diesel engine and hydraulic pumps.

3. The system according to claim 1 , wherein the hopper comprises a powder tank including agitators, a sump, and a conveyance screw for metering and dispensing dry guar powder.

4. The system according to claim 1 , wherein the powder hydration component comprises:
a venturi mixing system that uses pressurized water for creating a vacuum and wetting a dry polymer;
a vacuum break valve;
a pressure transducer or switch;
a centrifugal pump;
a pneumatic conveyance line; and
a pickup funnel.

5. The system according to claim 1 , further comprising liquid chemical equipment, wherein the liquid chemical equipment comprises:
chemical pumps;
metering devices; and
hosing for adding liquid chemicals to a functional gel or for making a functional gel from a liquid concentrate.

6. The system according to claim 1 , further comprising a platform and cabin.

7. The system according to claim 1 , wherein homogenized oilfield gel is produced from liquefied gel concentrates.

8. The system according to claim 1 , wherein homogenized oilfield gel is produced from guar gum powder.

9. The system according to claim 1 , wherein the hopper comprises:
agitation paddles; and
a split-level conical floor.

10. The system according to claim 1 , wherein the hopper comprises a manual fill hatch.

11. The system according to claim 1 , wherein the hopper comprises hinged doors on its sides so that it may be emptied manually.

12. A hydration unit comprising:
an agitated hopper for storing powder;
a metering dispenser for dispensing the powder from the agitated hopper;
a hydration tank comprising a water chamber and at least one gel chamber;
an eductor device for discharging oilfield gel into the at least one gel chamber of the hydration tank, comprising:
a first pump;
a pressure gauge; and
a vacuum interrupter valve;

a powder conveyance line for conveying powder from the metering dispenser to the eductor device;
a pick-up funnel connecting the metering dispenser to the powder conveyance line;
a piping assembly comprising an inlet pipe, a second pump, and a metering device for filling the hydration tank;
a water supply pipe connected to the educator device; and
an integrated sump disposed within the at least one gel chamber of the hydration tank,
wherein one end of the water supply pipe extends into the water chamber for extracting water from the water chamber, the inlet pipe of the piping assembly extends into the water chamber to provide water for filling the tank, and a manifold of the educator device is configured to discharge oilfield gel into the at least one gel chamber.

13. The hydration unit of claim 12 , wherein the agitated hopper comprises a powder tank including agitators, a sump, and a conveyance screw for metering and dispensing dry guar powder.

14. The hydration unit of claim 12 , wherein the at least one gel chamber comprises a first gel chamber, a second gel chamber, and a third gel chamber, and the hydration tank further comprises a first spill over weir between the water chamber and the first gel chamber, a second spill over weir between the first gel chamber and the second gel chamber, and a third spill over weir between the second gel chamber and the third gel chamber.

15. The hydration unit of claim 14 , wherein the first spill over weir is vertically higher than the second spill over weir or the third spill over weir.

16. The hydration unit of claim 12 , wherein, in response to less water being drawn out of the water supply pipe than coming out of the inlet pipe of the piping assembly, an overflow of water from the water chamber introduces water into the at least one gel chamber.

17. The hydration unit of claim 12 , wherein the at least one gel chamber comprises first, second, third, fourth, and fifth adjacent gel chambers, fluid is configured to flow from the water chamber to the fifth gel chamber, and the integrated sump is disposed within the fifth gel chamber.

Assignees

• Stewart & Stevenson Llc

Inventors

• Saffioti Stephen M

Classifications

• B01F2215/0081

  Operations & Transport · mapped topic

• B01F15/0251

  Operations & Transport · mapped topic

• B01F13/004

  Operations & Transport · mapped topic

• B29B7/60 Primary

  for feeding, e.g. end guides for the incoming material {(B29B7/7615 takes precedence; feeding predetermined amounts for mixing in general B01F35/714)} · CPC title

• B01F5/0415

  Operations & Transport · mapped topic