Patent US4255269A successfully refreshed from Google Patents.
US4255269A
Expired / Lapsed
US
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Method and apparatus for adapting the composition of a drilling fluid for use in making a hole in the earth by rotary drilling
Assignee: Individual
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Filing: 1979-05-29
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Granted: 1981-03-10
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Expires: 1999-05-29
Abstract
Abstract The drilling fluid of deviant composition is subjected to a separating process comprising two stages, including a sieving stage and thereafter a pressure filtration stage, the drilling fluid clinging to the sieve residue obtained in the sieving stage is sucked off by means of a partial-vacuum, the liquid obtained in the separating stage is used for adjusting the desired composition of the drilling fluid in the supply container thereof, and the solid material separated in the separating process is dried and further processed for recovering the solid material to be used in the drilling fluid.
Inventors
- 👤 Bernardus Timmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:30
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/06; E21B21/063; E21B21/065; E21B21/066; B; B01; B01D; B01D33/00; B01D33/01; B01D33/03; B01D33/0346; B01D33/04; B01D33/70; B01D33/72; B01D35/00; B01D35/20; B01D37/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
The method of adapting the composition of a drilling fluid, which includes additive solids, in a supply container for use in forming a hole in the earth by rotary drilling comprising the steps of subjecting a drilling fluid of deviant composition which includes drill cuttings and additive solids to a separating process which includes filtering said deviant fluid to remove solids therefrom and then subjecting the solid residue to a vacuum to remove fluid clinging to the solid residue, feeding fluid obtained by the separating process including the fluid removed by said vacuum to the drilling fluid in said supply container to adjust the specific gravity thereof, drying the solid residue containing said drill cuttings and additive solids and reclaiming said additive solids therefrom.
Claim 2
Dependent Claim
70 words
The method according to claim 1 wherein said dried solid material is vibrated to stratify into at least two layers one of which contains drill cuttings of one specific gravity and the other of which contains at least one additive solid of another specific gravity and then separating the additive solid from the drill cuttings whereby said additive solid is used in adjusting the specific gravity of the drilling fluid.
Claim 3
Dependent Claim
79 words
The method according to claim 1 which further includes adjusting the specific gravity of the fluid in said supply container by cycling said fluid to a second separating process which includes filtering the fluid to remove additive solids therefrom and subjecting the filtered additive solids to a vacuum to remove fluid clinging to the last said filtered solids, returning the filtered fluid to the supply container and continuing said second separating process until the desired specific gravity is attained.
Claim 4
Dependent Claim
176 words
Apparatus for adapting the composition of a drilling fluid in a supply container for use in forming a hole in the earth comprising an endless sieve conveyor belt carried by at least two rollers, means for feeding a deviant drilling fluid containing solid drill cuttings and at least one additive solid onto said conveyor belt, means beneath said belt for receiving fluid filtered by said belt, vacuum means disposed beneath a portion of said belt for removing fluid clinging to the solids filtered from said fluid, a conduit connecting said fluid receiving means to said supply container for feeding said filtered fluid to said container, a drying furnace, means for feeding said filtered solids to said furnace, a solids separating zone, means for feeding the solids dried by said furnace to said separating zone, said separating zone including vibrating means for stratifying solids with the upper stratified layer containing said drill cuttings and another lower layer containing said additive solid, vacuum means for removing said upper stratified layer and means for receiving said separated chemical solid.
Claim 5
Dependent Claim
176 words
Apparatus for adapting the composition of a drilling fluid in a supply container for use in forming a hole in the earth comprising an endless sieve conveyor belt carried by at least two rollers, means for feeding a deviant drilling fluid containing solid drill cuttings and at least one additive solid onto said conveyor belt, means beneath said belt for receiving fluid filtered by said belt, vacuum means disposed beneath a portion of said belt for removing fluid clinging to the solids filtered from said fluid, a conduit connecting said fluid receiving means to said supply container for feeding said filtered fluid to said container, a drying furnace, means for feeding said filtered solids to said furnace, a solids separating zone, means for feeding the solids dried by said furnace to said separating zone, said separating zone including vibrating means for stratifying solids with the upper stratified layer containing said drill cuttings and another lower layer containing said additive solid, vacuum means for removing said upper stratified layer and means for receiving said separated chemical solid.
Claim 6
Dependent Claim
20 words
Apparartus according to claim 4 wherein said filtered fluid receiving means is disposed approximately 1 meter below said vacuum means.
Claim 7
Dependent Claim
20 words
Apparatus according to claim 10 wherein the last said vacuum means removes solids having a specific gravity not exceeding 3.
References Cited (Backward Citations)
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US2218533A
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US2873032A
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US3039545A
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US3276966A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-09 | 1984-09-08 | 1985-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-09 | 1988-09-08 | 1989-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-09 | 1992-09-08 | 1993-03-10 | $7700.00 | Window Closed / Lapsed |