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Publication numberUS825745 A
Publication typeGrant
Publication dateJul 10, 1906
Filing dateAug 4, 1904
Priority dateAug 4, 1904
Publication numberUS 825745 A, US 825745A, US-A-825745, US825745 A, US825745A
InventorsMark D Mitchell
Original AssigneeMark D Mitchell
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Oil-flushing system.
US 825745 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)







Specification of Letters Patent.

Patented July 10, 1906.

Appiiwaon nea Angus 4, 1904. serial No. 219.513.-

. To all whom t may concern:

` wherein the supply is limited or the capacity of the Well intermittently exhausted within certain times by reason of a slow feed or sup-l ply from the oil-hearing stratum.

In oil-wells having a limited flow an inactivity at intervals of the pumpin mechanism is required, especially when the level of the oil in the pockets of such wellsis below the intake means or terminal of the pumping mechanism. 4

The method embodying the features of the invention consists in supplying a driving medium under pressure to the oil-bearing stratum within an eiective radius or proximity to one or more oil-well pockets. Advantage is taken of the confinement of the oil-bearing stratum under usual natural conditions between upper and lower strata of a dense nature to confine the pressure to the oil-bearing stratum to concentrate the effect- Ive driving and carrying influence of the pressure medium with res ect to the oil-well pocket or pockets within t e operative radius or proximity to the point of application of the pressure. This artificial pressure is to be understood as being entirely independent of any natural gas or other physicalfpressure; but this extraneous pressure may enter the pocket or pocketswith the oil and outlet through the ordinary gas-escape means of the well or wells with which it cooperates. The advantage of applying thisarticial pressure in the manner stated is that the oil in the roductive stratum, which may under natural) conditions have a slow exudation into a pocket or pockets within a given area of su ply, is forced to feed the lattermore expe 'tiously and maintain a constancy of oil-level within the pocket or pockets with material. advantage in the output of one or means for applying pressure to the stratum .'hole with respect to the pocket of the well. The oil-stratum 1 is conned, as usual, between dense strata 2, of slate or other material, and as in ordinary well drilling or Jforming operations a pocket 3 of a well 4 is formed within the said stratum 1. his well, as in ordinary constructions, will be equipped with a suitable casing 5, a pumping mechanism 6 operl ativerom the surface b any suitable means, and a gas vent or out et 7. 'A number of wells may be advantageously influenced by a single ressure-applying medium, and it is not to e understood that the invention is in any wise limited to the showing in the drawing, which is intended to convey solely the idea of a simplified a plication. Incarrying out the method a ho e 8 is bored through the earth' down to the oil-stratum 1 and may terminate, as shown, in an enlargement or pocket A9 to render the pressure medium more eifective with respect to the oil-bearing stratum. This hole 8 may bea well in adjacency to a number of other wells and may have the ordinary casing therein, or such may be specially prepared and equi ped with a casing particularly adapted for t e purpose. This variation will be dependent upon the necessities for practically establishing the method in relation to a well or a number of wells. ever, a packer or occluder 10 is inserted in the u per dense stratum 2 at the upper termina of the pocket 9, and in some instances a similar packer maybe introduced at the bottom of the said pocket. The packer '10 has a pi e or conduit 11 connecting therewith andpopening through the bottom of the same, the said pipe continuing upwardly through the hole or opening 8 or the well, as the case may be, and through an upper plug or closure 12. This "pipe 11 may connect In any event, how.

with a compressor or other suitable device,

the compressing medium. The compressing rot,

medium may consist of air, gas, or other fluid, to which may be icient to overcome any laxity in the forceful operation desired in the pocket or chamber 9 by an extended or long conveyance to the hole or opening 8.

The pressure medium arriving 1n the pocket or chamber 9 will force the dormant imparted a force suf'- loi i IIO method shall cooperate, and as the compressed air, gas, or other fluid permeates and passes through the stratum 1 the oil will.

either beforeed ahead of the same into the well pocket or pockets to be benefited by the method or such oil will be carried with the pressurel medium and b oth enter the well pocket or pockets, the oil being deposited in the latter and the pressure medium passing upwardly through thewell or wells and back to a storage-reservoir or to a compressor,in accordance with the nature of the pressure medium and the instrumentalities employed to arrive at the forceful nature thereof desired. This a plication of a pressure medium to an 0i -bearing stratum will be confined in its operation to said stratum owing to the packing feature heretofore set forth and the density of the strata 2, and the only outlets therefor will be through the oil-well pockets, and hence the oil must necessarily be driven thereby into said pockets, and consequently the oil in the pockets will be main-` tained at a more nearly uniform level and permit the pumps or pumping mechanism to continue to operate Without cessation with a material advantage in the output of Wells ordinarily hav-ing a slack flow and dependent on their supply upon gravitation or other natural operations. lIt will be understood that the force or driving nature of the pressure medium will be governed by the supoil-bearing stratum.

Instead of the simplified means set forth for concentrating the pressure or oil-driving medium between the strata 2 and preventing 'posed quantity of oil contained Withinx the 5 escape of ,the same above the uppermost 4o stratum 2 the pressure medium may be de' livered by any other suitable means having occluding features or a concentrating organization with respect to the oil-:bearing A stratum.

Having thus described the invention, what is claimed as new is D 1. The method of accelerating the supply of voil to a pocket Within an oil-bearing stratum, devoid of natural pressure consisting in applying and confining an artificial pressure medium with respect .to the stratum at a distance from the pocket and causing such medium to permeate and pass through the stratum and escape through the pocket.

2. The herein-described method of. maintaining a supply of oil in a pocketwithin an oil-bearing stratum devoid of a natural pressure, consisting in applying an artificial abnormal pressure to the said stratum in the direction of thepocket.

In testimony whereof I have hereunto set my hand in presenceof two subscribing Witnesses.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3743355 *Oct 12, 1971Jul 3, 1973Exxon Production Research CoMethod of withdrawing hazardous gases from subterranean formations
US4593760 *Jan 4, 1984Jun 10, 1986The Upjohn CompanyRemoval of volatile contaminants from the vadose zone of contaminated ground
US4660639 *Feb 6, 1986Apr 28, 1987The Upjohn CompanyRemoval of volatile contaminants from the vadose zone of contaminated ground
US5360067 *May 17, 1993Nov 1, 1994Meo Iii DominicVapor-extraction system for removing hydrocarbons from soil
US5554290 *Apr 11, 1995Sep 10, 1996Geraghty & Miller, Inc.Insitu anaerobic reactive zone for insitu metals precipitation and to achieve microbial de-nitrification
US5575589 *Apr 11, 1995Nov 19, 1996Geraghty & Miller, Inc.Apparatus and method for removing volatile contaminants from phreatic water
US5588490 *May 31, 1995Dec 31, 1996Geraghty & Miller, Inc.Method and system to achieve two dimensional air sparging
US5664911 *Jul 23, 1996Sep 9, 1997Iit Research InstituteMethod and apparatus for in situ decontamination of a site contaminated with a volatile material
US6007274 *May 19, 1997Dec 28, 1999Arcadis Geraghty & MillerIn-well air stripping, oxidation, and adsorption
US6102623 *May 18, 1999Aug 15, 2000Arcadis Geraghty & Miller, Inc.In-well air stripping, oxidation, and adsorption
US6116816 *Aug 26, 1998Sep 12, 2000Arcadis Geraghty & Miller, Inc.In situ reactive gate for groundwater remediation
US6143177 *Sep 21, 1998Nov 7, 2000Arcadis Geraghty & Miller, Inc.Engineered in situ anaerobic reactive zones
US6254310May 8, 2000Jul 3, 2001Arcadis Geraghty & Miller, Inc.In-well air stripping and adsorption
US6280118Jun 9, 2000Aug 28, 2001Arcadis Geraghty & Miller, Inc.In situ reactive gate
US6283674May 8, 2000Sep 4, 2001Arcadis Geraghty & MillerIn-well air stripping, oxidation, and adsorption
US6322700Aug 2, 2000Nov 27, 2001Arcadis Geraghty & MillerEngineered in situ anaerobic reactive zones
US6632364Jun 8, 2001Oct 14, 2003Arcadis G & MEngineered in situ anaerobic reactive zones
USRE33102 *Jul 12, 1988Oct 31, 1989The Upjohn CompanyRemoval of volatile contaminants from the vadose zone of contaminated ground
Cooperative ClassificationE21B43/164