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Publication numberUS2800085 A
Publication typeGrant
Publication dateJul 23, 1957
Filing dateFeb 10, 1956
Priority dateFeb 10, 1956
Publication numberUS 2800085 A, US 2800085A, US-A-2800085, US2800085 A, US2800085A
InventorsHansen Alfred E
Original AssigneeHansen Alfred E
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Apparatus for degasifying liquid in wells
US 2800085 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

y 1957 A. E. HANSEN 2,800,085

APPARATUS FOR DEGASIFYING LIQUID IN WELLS Filed Feb. 10, 1956 IN V EN TOR. /4/ reo iflaw m A T 702N157.

United States Patent APPARATUS FORYDEGASIFYING LIQUID IN WELLS Alfred Hansen, Muskegon, Mich.

' Application February 10, 1956, SerialgNo. 564,789

7 Claims. (Cl. 103203) This invention relates to improvements in apparatus for dega'sifying liquid in wells. The subject matter of Second to provide liquid deflecting and directing baf- 4 lies for a well sleeve that function to separate gas from liquid by the joint action of reducingjthe pressure in the liquid and then directing the liquid through a holding or delaying path to free falling streams over a discharge lip whereby gas entrained in the liquid is first permitted to form into small bubbles that combine and grow in the delaying path and are brought to thesurface of the liquid where they 'separate'and' escape from the liquid as the liquid is passed over the lip.

Third, to'provide liquid deflectingand directing bafflesitha t are secured to the inside of a well. sleeve .in spacedrelation to the center'of the sleeve so that a pump and pump discharge pipe can be inserted into the sleeve without obstruction from the troughs.

Other objects and advantages of the invention will be apparent from a consideration of the following description and claims. The drawings, of which there is one sheet, show a highly practical form of the invention.

Fig. 1 is a fragmentary vertical cross sectional view through a well having the degasifying apparatus of the invention mounted therein.

Fig. 2 is an enlarged fragmentary vertical cross sectional View through a portion of the well casing and the degasifying sleeve.

Fig. 3 is a transverse cross sectional view taken along the plane of the line 3-3 in Fig. 2.

The degasifying apparatus is designed for insertion in a well casing 1 that extends well below the ground level 2 of liquid in the well. The casing 1 has a screen 3 or other perforations therein so that the liquid normally stands in the casing to the same level as the surrounding liquid. Positioned in radially spaced relation within the casing 1 and extending a substantial distance below the liquid level is a sleeve 4 having a closed bottom 5 and top 6. A gas escape pipe 7 opens through the top of the sleeve and extends exteriorly of the well where a gas suction pump 8 may be provided. A pump discharge pipe 9 also extends through the top of the sleeve substantially into the sleeve and below the liquid level in the sleeve. The discharge pipe 9 extends exteriorly of the well and has a packing 10 for the entry of a pump shaft 11 into the discharge pipe. The shaft extends between a pump motor 12 and impeller mechanism 13 at the bottom of the discharge pipe 9.

Located within the sleeve 4 and below the liquid level therein are a plurality of vertically spaced upwardly facing annular troughs 14. The troughs have upturned cylindrical flanges 15 and.16. The outer flanges 15 are pressed into the sleeve and retained in place by short jet nozzles 17 positioned. in alined holes bored in the sleeve and the flanges 15. The inner flanges 16 are spaced radially from the pump shaft 11 and have inwardly and downwardly oifset lips 18 formed therein at angularly spaced positions from the nozzles 17. Desirably, the several troughs 14 are angularly rotated with respect to each other so'that the several nozzles 17 and lips 18 are not located directly one above the other.

In operation, the pump draws down the liquid level in the sleeve 4-and liquid from the casing flows with considerable force through the nozzles 17 from the casing 1. The jets from the nozzle first impinge against the inner flanges 16 in. an action that both reduces pressure and breaks the liquid up into small drops and permits the development of entrained gas into small bubbles. I The liquid then flows in one or both directions around the trough to one or more of the lips 18. This flow along the trough creates a holding or delaying period and path in which the small bubbles are permitted to combine and grow in size. The liquid flows over the lips and in sodoing is stretched to a thin film where the enlarged bubbles meet the surface of the liqiud and escape.

It is pointed out that in flowing around the trough from one or more jets plural streams of liquid approach a lip from opposite sides so that in efiect two streams of liquid meet in what is known in hydraulic engineering as a rising well. The action is such that turbulence and meeting of the two streams causes rapid combination of gas bubbles of increased size that are immediately released from-the liquid.

The liquid falls between the troughs 14 and theshaft 11 to the level of the liquid in the sleeve while the liberated gas rises or is drawn off through the pipe 7 and pump 8. The structure described is effective to liberate and separate a large proportion of gas entrained insub-surface liquids such as oil and water.

Having thus described the invention, what is claimed as new and is desired to be secured by Letters Patent is:

1. In a well, the combination with a casing extending below the ground level of the liquid to be pumped so that a substantial length of the casing is filled with the liquid, a gas separator sleeve disposed in spaced concentric relation within said casing to be surrounded by liquid therein, said sleeve being closed at its lower end and having a gas exhaust means at its upper end, a pump discharge column pipe disposed in spaced concentric relation within said sleeve and openingat its lower end thereto, and a plurality of upwardly facing annular troughs mounted on the inner wall of said sleeve and around said discharge pipe at spaced intervals therealong, said troughs having upstanding inner rims with angularly displaced inwardly and downwardly displaced overflow lips formed in their upper edges, said sleeve having inlet ports formed therein and opening to said troughs opposite to said rims and at angularly spaced positions from said lips.

2. In a well, the combination with a casing extending below the ground level of the liquid to be pumped so that a substantial length of the casing is filled with the liquid, at gas separator sleeve disposed in spaced relation within said casing to be immersed in liquid therein, said sleeve being closed at its lower end and having a gas exhaust means at its upper end, a pump discharge column pipe disposed in spaced relation within said sleeve and opening at its lower end thereto, and a plurality of upwardly facing annular troughs mounted on the inner wall of said sleeve and around said discharge pipe at spaced intervals therealong, said troughs having upstanding inner rims with angularly displaced inwardly and downwardly displaced overflow lips formed in their upper edges, said sleeve having inlet ports formed therein and opening to said troughsloppositeto-said rims and at angularly spaced positions from said lips'. 1' 1L;

3. In a well, the, combination with'a casing extending below the ground level of the liquid to.be;pumped. sothat a substantial length of the casing is filled with the liquid,

a gas separator sleeve disposed in spaced relation .within said casing to be immersed in liquid therein, said sleeve being closed at its lower end and'having a gas exhaust means at its upper end, a pump discharge column pipe 4. In a well, the combination with a casing extending below the ground level of the liquid to be pumped so that a substantial length of the, casing is filled with the liquid, a gas separator sleeve disposed in spaced relation within said casing to be immersed in liquid therein, said sleeve being closed at its lower end and having, a gas ing inner rims with inwardly and downwardly displaced overflow lips formed in their upper edges, said sleeve having inlet ports formed therein and opening to said troughs opposite to said rims and at angularly spaced positions from said lips. p p p 5. In a well, the combination with a casing extending below the ground level of the liquid to be pumped so that a substantial length of the casing is filled with the liquid, a gas separator sleeve disposed in spaced concentric relation Within said casing to be surrounded by liquid therein,

said sleeve being closed at its lower end and having a gas exhaust means at its upper end, a pump discharge column pipe disposed in spaced concentric relation within said sleeve and opening at its'lower end thereto, and means forming a plurality of upwardly facing annular troughs on the inner wall of said sleeve and around said discharge pipe at spaced intervals therealong, said sleeve having inlet ports formed therein and opening to said troughs opposite to the inner walls of the troughs.

6. A degasifying sleeve for insertion in a well comprising a cylindrical shell closed at its top and bottom and having openings formed in its top for a central pump discharge column and a gas exhaust connection, and means forming a plurality of annular upwardly facing troughs around the inside of said shell at spaced intervals therealong, said shell having inlet openings formed therein opposite the inner walls ofsaid troughs to discharge against said inner walls, the inner walls of said troughs having downwardly ofiset overflow lips formed in their rims 'at points angularly spaced from said inlet openings.

7. A degasifying sleeve for insertion in a well comprising ,a cylindrical shell-closed at its top and bottom and having openings formed in its top. for a' central pump discharge column and a gas exhaust connection, and means forming a plurality of annular upwardly facing troughs around the inside of said shellat spaced intervals therealong, said shell having inlet openings formed therein opposite the inner walls of said troughs to discharge against said inner walls. 1 7

References Cited in the file of this patent UNITED STATES PATENTS V 33,736 Elliot Nov. 19, 1861 I 994,335 Perkins June 6,1911 1,592,079 Chancellor et a1. July 13, 1926 0 2,024,703 Ragsdale et al. Dec. 17, 1935 2,346,602 OBannon Apr. 11, 1944 2,764,102 Abdoet al. Sept. 25, 1956

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US33736 *Nov 19, 1861 Improvement in pumps for oil-wells
US994335 *Jan 23, 1911Jun 6, 1911Elijah H PerkinsPumping system.
US1592079 *Dec 17, 1925Jul 13, 1926Calvert Sebastian LCombined separator and trap device
US2024703 *Feb 26, 1934Dec 17, 1935Conant David JTrench pump
US2346602 *Feb 17, 1941Apr 11, 1944O'bannon Walter ASeparator for well pumps
US2764102 *Feb 11, 1952Sep 25, 1956Socony Mobil Oil Co IncConstriction gas anchor
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3048122 *Dec 31, 1959Aug 7, 1962Hansen Alfred EGas separators for wells
US3319574 *May 24, 1965May 16, 1967Drysdale & Co LtdPumping arrangement for cargo ships arranged to carry liquid bulk cargo
US3891031 *Feb 4, 1974Jun 24, 1975Ortiz Carlos MayerSealing means for deep-well
US3939909 *Feb 4, 1974Feb 24, 1976Carlos Mayer OrtizSystem of suppressing the discharge casing string in deep-well vertical pumps
US4241788 *Jan 31, 1979Dec 30, 1980Armco Inc.Multiple cup downwell gas separator
US4444259 *Jan 15, 1982Apr 24, 1984Schwall Joseph AApparatus and method for purging hydrogen sulfide gases from well water
US8453726Aug 22, 2008Jun 4, 2013Daqing Oilfield Co., LtdCorrugated settling cup and a multi-cup uniform flux gas anchor
US20110209866 *Aug 22, 2008Sep 1, 2011Daqing Oilfield Co., Ltd.,corrugated settling cup and a multi-cup uniform flux gas anchor
CN100532782CDec 8, 2003Aug 26, 2009大庆油田有限责任公司第一采油厂;大庆科美达采油成套设备有限公司Method for gas liquid separation under oil well and uniform flow gas anchor of multiple sedimentation cups
CN101025080BDec 26, 2006May 11, 2011大庆油田有限责任公司Method for realizing high-water containing same-well injection-production by multi-cup equi-flow type down-hole oil-water separator
CN101377126BAug 28, 2007Apr 17, 2013大庆油田有限责任公司Corrugation-shaped sedimentation cup and multiple-cup equal flow type gas anchor
WO2009026787A1 *Aug 22, 2008Mar 5, 2009Daqing Oilfield Co. LitA corrugated settling cup and a multi-cup uniform flux gas anchor
Classifications
U.S. Classification166/105.5, 166/68.5, 417/199.2
International ClassificationE21B43/38, E21B43/34
Cooperative ClassificationE21B43/38
European ClassificationE21B43/38