US3446352A - Method and apparatus for washing and grading swarf,for use in the mining or the mineral-oil industry - Google Patents

Method and apparatus for washing and grading swarf,for use in the mining or the mineral-oil industry Download PDF

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Publication number
US3446352A
US3446352A US570467A US3446352DA US3446352A US 3446352 A US3446352 A US 3446352A US 570467 A US570467 A US 570467A US 3446352D A US3446352D A US 3446352DA US 3446352 A US3446352 A US 3446352A
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United States
Prior art keywords
swarf
container
water
washing
grading
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Expired - Lifetime
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US570467A
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English (en)
Inventor
Jean Sahores
Jacques Esquevin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Societe Nationale des Petroles dAquitaine SA
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Societe Nationale des Petroles dAquitaine SA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/62—Washing granular, powdered or lumpy materials; Wet separating by hydraulic classifiers, e.g. of launder, tank, spiral or helical chute concentrator type
    • B03B5/623—Upward current classifiers
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/06—Arrangements for treating drilling fluids outside the borehole
    • E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/06—Arrangements for treating drilling fluids outside the borehole
    • E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
    • E21B21/065—Separating solids from drilling fluids
    • E21B21/066—Separating solids from drilling fluids with further treatment of the solids, e.g. for disposal
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
    • E21B49/005—Testing the nature of borehole walls or the formation by using drilling mud or cutting data

Definitions

  • a conical vessel is provided with a discharge valve at its apex, a liquid inlet beneath the valve and a plurality of valved liquid jet inlets disposed above the discharge valve along a portion of the vessel length.
  • the top of the vessel is provided with an overflow trough and beneath the discharge valve and liquid inlet a container is disposed for receiving the sinking solids. Zones of turbulence in an ascending liquid stream are created by the jets and a uniform laminar flow is maintained above the topmost turbulent zone.
  • the present invention has for an object a method and apparatus for washing and grading swarf, for use in the mining or the mineral-oil industry.
  • the method and apparatus referred to above do not permit either a rapid and effective washing or a grading of the swarf in well defined granulometric portions or fractions and representing all the swarf contained at the beginning in the sample to be treated. Too weak an ascending outflow of water does not ensure a good washing of the swarf and a disaggregation of the swarf agglomerates, so that on the one hand the badly washed swarf and on the other hand swarf in the form of heterogeneous granulometric portions are found in these collecting cups.
  • the time necessary for washing and granulometrically grading a sample of swarf according to the known method and using the known apparatus is always too long in order to permit, without delay, a possible effective intervention during the carrying out of the drilling operations when the results of the analysis of the swarf are obtained.
  • this unacceptably large gap be tween the removal of the sample of swarf and the Washing and granulometric grading of the swarf does not permit the position of the drilled rock, from where said swarf comes, to be located with accuracy.
  • the present invention removes or minimises the above mentioned disadvantages and has for a particular object a method and apparatus for washing and granulometrically grading swarf permitting a sample of a mixture of slurry and a large quantity of swarf to be maintained in suspension in a certain volume of water and permitting the rapid disaggregation of the swarf agglomerates, the complete washing of each particle of swarf on the whole of its surface without the intervention of any moving mechanical member and the strict granulometric grading of the washed swarf.
  • the invention consists in a method for washing and grading swarf, comprising the steps of maintaining in suspension a sample of a mixture of slurry and rocky swarf in a vertical ascending current of water whose speed decreases in the downstream or upward direction, eliminating the slurry with the current of water and, collecting the different granulometric portions or fractions of washed swarf on the upstream side of the current of water, and wherein first zones of strong local turbulences are created in the main current of water on the one hand on the upstream side and centrally, and on the other hand, on the downstream side, a second zone is created presenting a uniform laminar ascending flow, recuperating of the different granulometric sections or ranges of swarf, after the slurry has been completely eliminated, by progressively decreasing the local turbulences on the one hand and the outflow of the main current of water on the other hand.
  • the invention also consists in apparatus for carrying out this method and of the kind comprising a vertical container for washing and grading, which is truncated in shape and whose base is pointed, which is open at its upper end and provided at its lower end with a valve; an evacuation collector provided at the upper end of the container; and a recuperation casing sealed to the lower end of the container, provided firstly with one or more lateral connections which can be connected to a source of pressurized water and secondly with a cup arranged underneath the valve, wherein a plurality of lateral fittings open into the Washing and grading container at least approximately in a perpendicular manner with respect to the axis of this latter, each provided with a closing member and capable of being connected to the same source of pressurized water as the casing.
  • FIGURE 1 is a schematic sectional view of a first embodiment of washing and grading apparatus according to the invention
  • FIGURE 2 is a schematic sectional view of a second embodiment, the valves controlling flow being omitted for reasons of clarity, and
  • FIGURE 3 is a schematic sectional view of a third embodiment, wherein the valves controlling flow are again omitted.
  • the apparatus for washing and granulometrically grading swarf in its form as is shown in FIGURE 1, comprises a downwardly pointed, generally conical truncated washing and grading container 1 which is open at its upper end and provided with a valve 2 at its lower end.
  • the container 1 At its upper end, the container 1 is surrounded and surmounted by an evacuation collector 3 whilst at its lower end it is sealed to a recuperation casing 4 having connected thereto one or more lateral connections 5-5 connected to a source of water under pressure, each lateral connection 5, 5' being provided with a closing member or valve V V Near its lower end, above the valve 2, the container 1 is connected to a supply conduit S which is adjustable by a valve V and connected directly to the slurry-evacuating drain of the drilling well.
  • the casing 4 is provided with an unscrewable cover 6 which serves as a support for a cup 7 arranged in said casing 4 underneath the valve 2, which cup is intended to receive the washed swarf.
  • the container 1 has a certain number of lateral fittings 8, 9 which open out into the container 1 at different levels, the lower lateral fittings 8 being at least approximately perpendicular to the axis of said container 1.
  • Each of these lateral fittings 8, 9 is connected to a source of water under pressure and is provided with a valve or closing member V V
  • At least the zone or the part situated near the upper end of the container 1 is not provided with any lateral fittings. This part is at least to cm. high.
  • Below this part there is a part or zone provided with the lateral fittings 9, which fittings are inclined with respect to the axis of the container 1 and perpendicular to the wall of the container opposite the opening of the corresponding fitting 9.
  • the fittings 8 are situated in the lowest parts of the container and are preferably horizontal, their axes being parallel in pairs, and opening out into the container 1 on walls which are opposite one another.
  • this apparatus is as follows: the container 1 is filled with a predetermined volume of a mixture of slurry and swarf, for example by means of the supply conduit S, the valve 2 and the valves V V for closing the fittings 8, 9 being closed. Then a current of water known as supporting water, whose speed decreases when flowing in an upward direction and which serves to maintain the swarf contained in the slurry-swarf mixture in suspension without an appreciable quantity of swarf overflowing into the collector 3 of the container, is made to circulate through the connections 5, 5, the open valve 2 and the container.
  • valves V V for closing the different fittings 8, 9 are opened, which sends into the main current of water very fine jets of highly compressed water which are capable of cutting up the agglomerates and partially dried slurry.
  • the washing of the swarf is also ensured by these jets of Water.
  • These jets are directed in such a manner that they create in different parts of the container 1 zones of local turbulent flow, the jets crossing one another at a short distance and in this way imposing on the swart which is located in the intermediate space a sort of shearing torque.
  • the whole of the outflow of water entering into the container on the one hand through the valve 2 and on the other hand through the fittings 8, 9 is regulated so that the suspension of the swarf is ensured, so that in the lower and central parts of the container 1 there exist first zones of high local turbulence and so that at least at the upper end of the container there is a second zone whose rate of flow is perfectly laminar.
  • any tangential speed component is also 4 avoided in order to create no rotary movement of the assembly, nor cyclonic operation which could be only harmful because it would facilitate the driving of the fine swarf out of the container 1.
  • the swarf is violently stirred in the zones of turbulent flow, and the fine particles below a certain range of dimension, adjustable for example between 40 and 300; and determined by the total outflow of water entering the container 1, are evacuated by the current of water flowing at the upper end of the container into the evacuation collector 3.
  • the operation for disaggregating the agglomerates and for washing the swarf are terminated after about 10 minutes. Then the large swarf is seen in the water which has become clear in the container 1, to eddy in the lower part of the container 1, whilst the average and fine swarf swirls in the upper zones of said container.
  • the washing and granulometric grading container comprises a certain number of truncated parts 10a, 10b, 10c, 10d, alternating with parts of cylindrical form 11a, 11b, 1'10 and 11d.
  • the fittings 8 and 9 are provided on the truncated parts 10a, 10b, 10c and 10d respectively.
  • the upper end of the container is constituted by the cylindrical part 10d.
  • the respective diameters of two cylindrical parts, for example 11b and 11c, situated on either side of a truncated part, for example 100, are respectively equal to the diameters of the lower and upper ends of the truncated part 100.
  • the embodiment as shown in FIGURE 2 enables a separation to be obtained at very clearly defined washing and grading zones.
  • the conical frusta 10a, 10b, 10c, 10d constitute zones of turbulent flow and of violent stirring, whilst the cylinders 11a, 11b, 11c, 11d constitute zones of laminar flow at uniform speed.
  • These zones of laminar fiow ensure that a large quantity of swarf corresponding to a well determined granulometric portion (function of storage and separation) be maintained in suspension, constitute transition zones between two washing zones intended for different granulometric portions and permit a precise definition of the granulometric cutting of the portions corresponding to the diflerent zones.
  • the container 1 comprises a recuperation casing 4 provided with a plate 12 for supporting a plurality of cups 7, 7', etc.
  • This plate 12 rests for example on a ball bearing 13, is rotatable and may be controlled by means of a drive cylinder 14.
  • the plate 12. is arranged so as to be capable of guiding each of the cups 7, 7' underneath the valve 2. In other words, this plate operates in the manner of a revolver cylinder.
  • the casing 4 also comprises a chamber (not shown) for replacing the cups 7, 7', as well as difierent connections 5, 5, 5" connected to a source of water under pressure.
  • this second embodiment is approximately identical to that of the device shown in FIGURE 1. However, in the present case, it is not necessary to close the valve 2 upon the passage of one granulometric portion to another and upon the replacement of a cup 7, 7, etc.
  • This embodiment may advantageously be associated with a clockwork mechanism (not shown) which co-operates with the closing valve V provided in the supply conduit S of the container 1, the diiferent valves (not shown) for closing the fittings 8, 9 and the connections 5, 5', 5", etc. with the valve 2 and the mechanism for driving the plate 12.
  • a clockwork mechanism (not shown) which co-operates with the closing valve V provided in the supply conduit S of the container 1, the diiferent valves (not shown) for closing the fittings 8, 9 and the connections 5, 5', 5", etc. with the valve 2 and the mechanism for driving the plate 12.
  • each stage 1a, 1b, 1c, 1d comprises a truncated part a, 10b, 10c and 10d surmounted by a cylindrical part 11a, 11b, 11c and 11d.
  • the upper end of each stage is provided with an evacuation collector 3a, 3b, 3c and 3d, whilst the lower end is secured to a recuperation casing 4a, 4b, 4c and 4d.
  • Each of these casings contains or forms a cup intended to receive the washed and graded swarf.
  • the first casing 4a is connected to a source of water under pressure whilst the other casings 4b, 4c and 4d are each connected to the evacuation collector 3a, 3b, 3c of the preceding stage.
  • the truncated part 10a, 10b, 10c and 10d of each stage 1a, 1b, 1c, 1d is provided with lateral fittings 8, 9, the lower fittings 8 being perpendicular to the axis of the stage, and the upper fittings 9 being preferably perpendicular to the wall situated opposite the opening of the corresponding fitting.
  • a method of washing and grading swarf consisting in the steps of:
  • Apparatus for washing and grading swarf comprising: a generally conical vertical washing and grading container truncated in shape and pointed at its base, said container being open at the upper end thereof and being provided at its lower end with a control valve; an evacuation collector provided at the open upper end of said container for receiving liquid overflowing said upper end; a recuperation casing sealed to the lower end of said container below said control valve, and provided with one or more connections laterally thereof, said connections being connected through valve means to a source of water under pressure; cup means arranged below said control valve within said recuperation casing; a first plurality of lateral fittings on a lower, first conical portion of said container, said first lateral fittings opening into said container and being arranged with their axes at least approximately perpendicular to the vertical axes of said container, each of said first lateral fittings being connected through valve means with a source of water under pressure; a second plurality of lateral fittings on an upper, second conical portion of said container, said second

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Sampling And Sample Adjustment (AREA)
US570467A 1965-08-12 1966-08-05 Method and apparatus for washing and grading swarf,for use in the mining or the mineral-oil industry Expired - Lifetime US3446352A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR28209A FR1458314A (fr) 1965-08-12 1965-08-12 Procédé et dispositif pour le lavage et le classement des déblais de forage

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US3446352A true US3446352A (en) 1969-05-27

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US570467A Expired - Lifetime US3446352A (en) 1965-08-12 1966-08-05 Method and apparatus for washing and grading swarf,for use in the mining or the mineral-oil industry

Country Status (5)

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US (1) US3446352A (enrdf_load_stackoverflow)
DE (1) DE1296104B (enrdf_load_stackoverflow)
FR (1) FR1458314A (enrdf_load_stackoverflow)
GB (1) GB1154336A (enrdf_load_stackoverflow)
NL (1) NL6611416A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4705623A (en) * 1984-08-24 1987-11-10 Mobil Oil Corporation Hydrosizing method and apparatus
US10300495B2 (en) * 2014-08-06 2019-05-28 Newcastle Innovation Limited Apparatus and method for removing an underflow stream

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2523641A1 (fr) * 1982-03-18 1983-09-23 Sogelerg Structures Procede et dispositif de lancement d'un tunnel immerge

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US664712A (en) * 1898-09-14 1900-12-25 Alfonso Zevada Baldenebro Grading-amalgamator.
US1133721A (en) * 1912-08-23 1915-03-30 William E Gregg Sand washing and grading apparatus.
US1147356A (en) * 1914-12-09 1915-07-20 Allen Charles R Slime separator and classifier.
US1966609A (en) * 1932-12-15 1934-07-17 Henry M Chance Method and apparatus for separating materials of differing specific gravities
US2361207A (en) * 1939-12-30 1944-10-24 Orefraction Inc Separation

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE899931C (de) * 1947-11-11 1953-12-17 Dr Theodor Eder Verfahren und Vorrichtung zur Klassierung von Gemischen nach Fallgeschwindigkeit im aufsteigenden Fluessigkeitsstrom
DE1136651B (de) * 1959-03-26 1962-09-20 Kleemann S Vereinigte Fabriken Klassierkegel zur Feinsandaufbereitung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US664712A (en) * 1898-09-14 1900-12-25 Alfonso Zevada Baldenebro Grading-amalgamator.
US1133721A (en) * 1912-08-23 1915-03-30 William E Gregg Sand washing and grading apparatus.
US1147356A (en) * 1914-12-09 1915-07-20 Allen Charles R Slime separator and classifier.
US1966609A (en) * 1932-12-15 1934-07-17 Henry M Chance Method and apparatus for separating materials of differing specific gravities
US2361207A (en) * 1939-12-30 1944-10-24 Orefraction Inc Separation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4705623A (en) * 1984-08-24 1987-11-10 Mobil Oil Corporation Hydrosizing method and apparatus
US10300495B2 (en) * 2014-08-06 2019-05-28 Newcastle Innovation Limited Apparatus and method for removing an underflow stream

Also Published As

Publication number Publication date
NL6611416A (enrdf_load_stackoverflow) 1966-10-25
GB1154336A (en) 1969-06-04
DE1296104B (de) 1969-05-29
FR1458314A (fr) 1966-03-04

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