# US 5,341,879 A · Fine filtration system

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- Number: US 5,341,879 A
- Document ID: US5341879A
- Status: Granted
- Kind: A
- Application number: 08/036,186
- Filed: 1993-03-23
- Granted: 1994-08-30
- Earliest claimed: 1993-03-23
- Inventors: William B. Stone
- Web page: https://patentgrep.com/patent/US5341879A

## CPC

- E21B 43/267: reinforcing fractures by propping
- E21B 43/04: Gravelling of wells
- E21B 43/2607: {Surface equipment specially adapted for fracturing operations}
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

## Abstract

An apparatus and improved method for removing fines or small particles from a particle and liquid mixture, finding particular application in the field of oil and gas well gravel packing and fracturing processes.

## Claims

### Claim 1

An improved method of gravel packing or fracturing a subterranean well, wherein a particle/liquid mixture is forced into or against a formation by a high pressure, high volume pump, the improvement comprising:
filtering said particle/liquid mixture after it has passed through said high pressure, high volume pump to effectuate removal of fines created by said pump.

### Claim 2

An improved method of fracturing a subterranean well, wherein fracturing chemicals are added to a particle/liquid mixture before said particle/liquid mixture is forced into a formation by a high pressure, high volume pump, the improvement comprising:
adding said fracturing chemicals to said particle/liquid mixture after said mixture has passed through said high pressure, high volume pump; and
filtering said particle/liquid mixture before said fracturing chemicals are added to effectuate removal of fines created by said pump.