Patent US4214879A successfully refreshed from Google Patents.
US4214879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Degassing apparatus
Assignee: Individual
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Filing: 1978-12-26
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Granted: 1980-07-29
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Expires: 1998-12-26
Abstract
Abstract A degassing apparatus which has a degassing head from which extends a tube; a shaft is rotated in the tube; a screw conveyor above intake holes of the tube conveys drill mud upward against a deflector disc at the open top of the tube; three rows of inwardly inclined baffles around the side wall of the degassing head are so arranged that the baffles of the various rows are staggered relatively to one another; the mud flows by gravity to the inclined bottom of the head and to an outlet leading out of the head to a container for the degassed mud; a fan above the deflector disc sucks air through the mud spray and out through an outlet; a conduit conducts gas from below the mud spray to the fan and a vent; the shaft at the bottom of the tube is held in a bearing protected against influx of mud; adjustable legs on the degasser head are adapted to support the head on top of a vessel in which the drill mud is contained.
Inventors
- 👤 James A. Whetstone
- 👤 George W. Tillett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:35
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/06; E21B21/063; E21B21/067; B; B01; B01D; B01D19/00; B01D19/0042; B01D19/0052
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
143 words
A degasser apparatus comprising: a conduit having an inlet adapted for mounting in and formed to receive drilling mud to be recycled and an open mud discharge end; a positive displacement rotary screw impeller mounted in said conduit adjacent said inlet and a drive shaft connected to said impeller and extending longitudinally through said conduit and from said discharge end; motive means connected to and for driving said shaft for inducting mud into said inlet and for driving said mud longitudinally through said conduit around said shaft and for hurling said mud from said discharge end; and a mud deflector wall mounted in surrounding relation to said shaft and in a plane substantially perpendicular thereto and in spaced relation to said end for intercepting said mud and causing said mud to fan out in a thin sheet for liberation of gas entrapped therein.
Claim 2
Dependent Claim
143 words
A degasser apparatus comprising: a conduit having an inlet adapted for mounting in and formed to receive drilling mud to be recycled and an open mud discharge end; a positive displacement rotary screw impeller mounted in said conduit adjacent said inlet and a drive shaft connected to said impeller and extending longitudinally through said conduit and from said discharge end; motive means connected to and for driving said shaft for inducting mud into said inlet and for driving said mud longitudinally through said conduit around said shaft and for hurling said mud from said discharge end; and a mud deflector wall mounted in surrounding relation to said shaft and in a plane substantially perpendicular thereto and in spaced relation to said end for intercepting said mud and causing said mud to fan out in a thin sheet for liberation of gas entrapped therein.
Claim 3
Dependent Claim
26 words
The apparatus of claim 1, said wall being mounted for rotation and connected to and driven by said motive means for centrifugally driving said mud sheet.
Claim 4
Dependent Claim
20 words
The apparatus of claim 2, said wall comprising a circular disc mounted centrally on said shaft and for rotation therewith.
Claim 5
Dependent Claim
23 words
The apparatus of claim 1, and means providing a reduced air pressure on one side of said sheet for drawing off liberated gas.
Claim 6
Dependent Claim
29 words
The apparatus of claim 4, and a conduit extending from the opposite side of said sheet to said one side for drawing off gas liberated at said opposite side.
Claim 7
Dependent Claim
47 words
The apparatus of claim 3, means providing a reduced air pressure on one side of said sheet for drawing off liberated gas; and a conduit extending from the opposite side of said sheet and to said one side for drawing off gas liberated at said opposite side.
Claim 8
Dependent Claim
54 words
The apparatus of claim 3, a housing having a substantially cylindrical side wall mounted on a substantially vertical axis substantially concentric to said conduit and disc, thus positioning said wall for intercepting at substantially right angles the radially cast mud; and baffles on said wall positioned for receipt and gravitation thereover of said mud.
Claim 9
Dependent Claim
57 words
The apparatus of claim 7, means providing a reduced air pressure above said sheet for drawing off liberated gas; and a conduit extending from adjacent said baffles at the underside of said sheet to the upper side of said sheet for drawing off gas liberated from the mud at the underside of said sheet and said baffles.
Claim 10
Dependent Claim
58 words
The apparatus of claim 8, said baffles being disposed in a plurality of vertically superimposed circumferentially extending rows with the baffles in each row staggered from the baffles in the adjacent row; and each baffle forming a downwardly inclined tapered channel having its narrower end at said wall and its wider end spaced radially inwardly from said wall.
Claim 11
Dependent Claim
104 words
The apparatus of claim 1, said conduit having a normally vertical longitudinal position in use with said inlet spaced above a lower end of said conduit; a bearing housing mounted in said lower conduit end concentrically thereof, said shaft having a lower end extending below said impeller and concentrically within said housing; a bearing mounted to and between said housing and shaft for journaling said shaft in said housing; and means inhibiting mud entry to said bearing comprising a hood member secured to said shaft for rotation therewith and superimposed over and depending into surrounding relation to said housing for centrifugally displacing mud therefrom.
Claim 12
Dependent Claim
28 words
The apparatus of claim 10, and a hydrostatic lubricant feed connected to said housing for supplying lubricant to and for maintaining a head of lubricant on said bearing.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-29 | 1984-01-28 | 1984-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-29 | 1988-01-28 | 1988-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-29 | 1992-01-28 | 1992-07-29 | $7700.00 | Window Closed / Lapsed |