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Publication numberUS2195898 A
Publication typeGrant
Publication dateApr 2, 1940
Filing dateAug 23, 1938
Priority dateAug 23, 1938
Publication numberUS 2195898 A, US 2195898A, US-A-2195898, US2195898 A, US2195898A
InventorsNewton Daniel O
Original AssigneeSocony Vacuum Oil Co Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Apparatus for degassing rotary muds
US 2195898 A
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Description  (OCR text may contain errors)

April D. o. NEWTON 2,195,898

APPARATUS FOR DEGASSING. ROTARY MUDS Filed Aug. 23, 1938 DANIEL O. NEWTON lNVENTOR QM M A T TORNE) Patented Apr. 2, 394% Unitas stares- APEARATUS FOR DEGASSING ROTARY Daniel 0. Newton, Huntington Park, Calit, assignor to Socony-Vacuum Oil Company, Incorporated, New York, N. Y., a corporation of New York Application August 23, 193s, Serial No. 226,311

1 Glaim.

It has often been observed that in the drilling of deep wells by the rotary method the circulating mud fluid often becomes gas-cu in passing through strata yielding natural gas under considerable pressure. By entraining great numbers of minute gas bubbles the mud is materially changed in physical characteristics, being reduced in weight and increased in viscosity.

In modern drilling practice it is desirable or necessary to control within narrow limits both the weight and the viscosity of the mud to meet variable conditions, such for example as rock pressure, hardness, and permeability, existing in the hole being drilled, and any spontaneous and uncontrolled variation from the preferred characteristics is highly undesirable and may even be disastrous if allowed to accumulate.

The object of the present invention is to obviate the evil effects of gas-cutting by continuously removing entrained gas from the circulating fluid prior to its return to the drilling .operation.

To attain this object I pass the stream of mud through a zone of reduced pressure and cause it to flow in a circuitous path by which the gas bubbles, enlarged and reduced in weight by the reduced pressure, are brought to the upper side of the zone, in which they are collected and-from which they are withdrawn.

The method may best be explained with reference to the attached drawing, showing in vertical section and partial elevation an apparatus adapted to the practice of the method.

Referring to the drawing: l is the conventional sump into which the circulating mud is discharged from the well and from which it is returned by the pump indicated at 2 after it has been conditioned. 3 is a tank adapted to resist external pressure, preferably of cylindrical form and with bumped heads as shown, this tank being provided with an upright tower 4. This tower is evacuated by a vacuum pump 5 through a pipe 6 connecting the suction of the pumpwith the top of the tower.

; The tower is provided with two vacuum controls arranged to control respectively the maximum height to which mud can rise in the tower and the subatmospheric pressure which it is desired to maintain in the tower. For the first pur- 50 pose I suggest a valve or cock 1 operated by a float 8 and arranged to open when the float rises above a predetermined level. The pipe 9 on which valve l is mounted may terminate in an ll V V r 1 open end outside the tank and admit air to the space it above the mud level, but I prefer to connect it with a diaphragm regulator ll operating a make and break switch not shown within a control box l2, this switch interrupting the [t flow of current through the leads I? and thus cutting out pump drive motor I 41 when the float rises. In order to allow the diaphragm to return and thus close the switch when the float again subsides, a small leakage orifice indicated at B5 is 10 inserted in pipe 9.

The vacuum control may be a simple spring loaded valve arranged to admitair into the tower above the mud level, but I prefer to utilize a diaphragm regulator 16 connected with the tower by pipe ll and arranged to open a switch in control box l2 when the vacuum exceeds a predetermined maximum. The two switches described should be connected in series in leads it so that the opening of either switch will interrupt 20 v the operation of motor Id and vacuum pump 5.

Inside tank 3 it is desirable to provide a plurality of baffles l8-l9 arranged to cause the mud to flow in a circuitous course as it passes through the tank. The upper baflles should be provided with gas ports 20 to allow the separated gas to flow along the upper side of the horizontal tank and into the tower.

Finally, the tank 3 should be so elevated above the suction of pump 2 and above the liquid level in sump I that the hydrostatic head in pipes 2| and 22 will balance the subatmospheric pressure which it is desired to maintain in tower space Ill and prevent any appreciable reduction below atmospheric pressure at the pump suction.

I claim as my invention:

Apparatus for conditioning gas-cut rotary mud, comprising: a substantially closed vessel in the form of a horizontally disposed cylinder provided with a vertical tower extending upwardly therefrom; pipe connections from said horizontal cylinder to a source of supply of said mud and to a pump arranged to withdraw conditioned mud from said vessel; a vacuum pump arranged to withdraw evolved gas from the upper portion of said vertical tower and to maintain subatmospheric pressure therein; means for limiting the mud level within said vessel to a desired maximum, said maximum mud level being located in said vertical tower; and means for limiting the degree of vacuum within said tower and above said mud level to a desired maximum.

DANIEL O. NEWTON.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2489180 *Apr 1, 1939Nov 22, 1949Hayward John TMethod of detecting gas in well drilling fluids
US2748884 *Jun 30, 1952Jun 5, 1956Salt Water Control IncApparatus for treating drilling mud
US3109714 *Jul 22, 1959Nov 5, 1963Technicon InstrMeans for separating fluids from each other
US3241295 *Sep 11, 1963Mar 22, 1966Bass Brothers Entpr IncDrilling mud degassers for oil wells
US3255576 *Oct 2, 1964Jun 14, 1966United Gas CorpMud degasser
US3314219 *Mar 10, 1965Apr 18, 1967Bass Brothers Entpr IncDrilling mud degassers for oil wells
US3325974 *Sep 7, 1965Jun 20, 1967Bass Brothers Entpr IncDrilling mud degassers for oil wells
US3402527 *May 9, 1967Sep 24, 1968Nat Lead CoMud degasifier
US3460319 *Apr 11, 1967Aug 12, 1969Tkach JosephControlled volume degasification of liquid
US3481113 *Dec 18, 1967Dec 2, 1969Gerald E Burnham SrApparatus and method for the degassification of drilling muds
US3498343 *Dec 13, 1966Mar 3, 1970Lawrence R SperbergApparatus for inflating pneumatic tires with an inert gas
US4294593 *May 2, 1980Oct 13, 1981Rehm William ADrilling mud degasser apparatus and system
US4304578 *Aug 31, 1979Dec 8, 1981Instrumentarium OyWater separator for a gas analyzer
US4315760 *Jan 17, 1980Feb 16, 1982Bij De Leij Jan DEspecially for milk
US4397659 *Jun 22, 1981Aug 9, 1983Lucas Industries LimitedFlowline degaser
US4579568 *Oct 11, 1983Apr 1, 1986Biochem International Inc.Prevention of fluid flow from input port to output port in medicalequipment
US4592368 *Oct 11, 1983Jun 3, 1986Biochem International Inc.Gas analyzer protection system
US4802897 *Aug 5, 1986Feb 7, 1989Johnson Arthur FRecovery of gases from non-viscous solvents
US4997464 *Mar 23, 1990Mar 5, 1991Kopf Henry BDeaeration apparatus
US5810037 *Jul 7, 1995Sep 22, 1998Daido Metal Company Ltd.Ultrasonic treatment apparatus
US8101089 *Nov 9, 2007Jan 24, 2012Liquid Separation Technologies And Equipment, LlcApparatus for aeration of contaminated liquids
Classifications
U.S. Classification96/166, 96/198
International ClassificationE21B21/00, E21B21/06
Cooperative ClassificationE21B21/067
European ClassificationE21B21/06N4