WO1982004405A1 - Separateur petrole/gaz - Google Patents

Separateur petrole/gaz Download PDF

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Publication number
WO1982004405A1
WO1982004405A1 PCT/GB1982/000182 GB8200182W WO8204405A1 WO 1982004405 A1 WO1982004405 A1 WO 1982004405A1 GB 8200182 W GB8200182 W GB 8200182W WO 8204405 A1 WO8204405 A1 WO 8204405A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas
oil
sleeve
mixture
separator device
Prior art date
Application number
PCT/GB1982/000182
Other languages
English (en)
Inventor
Reginald Martin
John William Brookes
Thomas Sylvester Reeve
Original Assignee
Reginald Martin
John William Brookes
Thomas Sylvester Reeve
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Reginald Martin, John William Brookes, Thomas Sylvester Reeve filed Critical Reginald Martin
Publication of WO1982004405A1 publication Critical patent/WO1982004405A1/fr
Priority to DK65583A priority Critical patent/DK65583A/da

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Classifications

    • 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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/34—Arrangements for separating materials produced by the well
    • E21B43/36—Underwater separating arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0031—Degasification of liquids by filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0042—Degasification of liquids modifying the liquid flow
    • B01D19/0052—Degasification of liquids modifying the liquid flow in rotating vessels, vessels containing movable parts or in which centrifugal movement is caused
    • B01D19/0057—Degasification of liquids modifying the liquid flow in rotating vessels, vessels containing movable parts or in which centrifugal movement is caused the centrifugal movement being caused by a vortex, e.g. using a cyclone, or by a tangential inlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0063—Regulation, control including valves and floats
    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • E21B33/035—Well heads; Setting-up thereof specially adapted for underwater installations
    • E21B33/0355—Control systems, e.g. hydraulic, pneumatic, electric, acoustic, for submerged well heads
    • 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
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/16—Control means therefor being outside the borehole
    • 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
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/02—Valve arrangements for boreholes or wells in well heads
    • E21B34/04—Valve arrangements for boreholes or wells in well heads in underwater well heads

Definitions

  • the present invention relates generally to the separ- " ation of gas from oil in a mixture thereof , and par- ticul arly to a method and app aratus for effecting separ ⁇ ation of gas from oil at high pressure such as exists , for example , at the well head of an oil well .
  • the present invention seeks to provide appar ⁇ atus for separating gas from oil in a mixture thereof * at high pressure in which continuity of oil flow can be ensured despi te irregul ar flow of the mixture and pres ⁇ sure fluctuations such as are experi enced at the well head , and in which there is also an abili ty to control the pressure drop to requirements .
  • the present inventi on also seeks to provide app aratus for separating gas from oil , which uses the energy in the outflowing mixture from the well head to drive the sep aration process .
  • a sep- arator device for separating gas from oil in a mixture thereof at high pressure includes a guide duct for guiding the flow of the mixture at high pressure along a flow path a part of the surface area of which is defined by a gas-permeable surface , the flow path being so shaped that expansion of the gas content of the mixture drives it through the said gas-permeable surface where it is collected in a gas collection duc , the said guide duct directing the oil fraction to an oil delivery duct.
  • the separator device of the present invention use is therefore made of the pressure in the gas to drive it through the gas-permeable wall , and in one embodiment this is encouraged by increasing , as much as possible , the potenti al ⁇ contact area between the gas and the gas- permeable wall by directing the mixture through a flow path having a very flattened flow cross section.
  • the separating effect is also encouraged by the venturi effect if the flattened portion of the guide duct has , in practice , a smaller cross sectional area than the duct guiding the gas/oil mixture to the sep arator device and the oil delivery and gas collection ducts which individually direct the separated fractions away from the separator device.
  • the separating effect of the device of the present invention is enhanced if there are provided a plurality of such guide ducts defined by a generally cylindrical gas-permeable sleeve housing a close fitting central core in which there is formed a plurality of shallow , generally axi ally extending channels.
  • shallow channels define the portion of flattened flow section and an increase in the sep arating effect can be achieved if , instead of extending purely axi ally , the shallow channels in the central core extend helically therealong since this causes a degree of swirl in the gas and oil mixture as it p asses through the device encouraging the gas to collect at the radi ally outer- part of the sep ⁇ arator whilst the oil tends to remain at a radi ally
  • the gas tends to collect in a central position within the duct , surrounded by the flowing oil which neverthel ess also contains gas bubbles and is therefore in a frothy or foaming state.
  • the action of the sep arator of the present invention is thus to cause the gas to react differently from the oil to the forces they both exper ⁇ ience , subsequently allowing the gas to p ass through the gas-permeable wall whilst the oil is held within the separator sp aced from the gas-permeable wall .
  • a pro- portion of the oil will , however , p ass through the gas- permeable wall p articul arly if this is formed , as in the preferred embodiment , of a foraminous sleeve around a central core , and this entrained oil can be separated out under the action of gravity at the rel atively lower pressures involved by positioning the sep arator wi th i ts flow -axis extending substanti ally vertically.
  • the present invention comprises a sep ⁇ arator device for separating gas from oil in a mixture thereof at hi gh pressure , such as at the well head of an oil well , comprising means for causing the mixture to follow a generally helical flow p ath defined in p art by a gas-permeable wall across which a pressure differenti al is maintained such that the gas in the mixture is urged to traverse the wall to a gas collection gallery or duct , whilst the oil is dir ⁇ ected by guide means to an oil delivery duct.
  • This helical flow or "swirl" of the mixture conveniently takes pl ace within the above mentioned generally cylindrical sleeve which constitutes the gas- permeable wall and which defines the radially outer surface of the generally helical flow path of the mixture.
  • the gas-permeable wall is in a pref- erred embodiment of the invention , provided with helical rows of perforations aligned with internal channels in such a way that the perforations only extend over a part of the axial extent of the ch-annels leaving a solid wall portion for oil retention. " These wall portions are preferably axially spaced.
  • the elongate core has a plurality of helical channels , which may be defined by upstanding helically extending ridges on the core or ma be formed as helical grooves in the core. If the core is provided with ridges , these preferably fit tightly against the inner surface of the gas— permeable wall so that each individual helical channel defines an en ⁇ tirely separate helical flow p ath for the mixture.
  • Oil entrained with the gas p assing through the said gas-permeable wall can be collected at the lower end of rhe separator device if this is arr ⁇ anged in an upright orientation with the flow path for the mixture extending upwardly there ⁇ through providing the flew cross section in the gas gallery is sufficiently large in relation to the flow cross section within the above men ⁇ tioned helical flow t- ai-h to cause a substantial
  • the gas-permeable wall may have any convenient structure and may be made of a porous materi al having pores of any convenient size. Howeve , in order to avoid the possibility of clogging it is preferred that the gas- permeable wall is a foraminous wall having an array of perforations through which oil particles can also pass if entrained with the gas since , with the above des ⁇ cribed arrangement of the gas galleries , a small amount of oil entrained with the gas can be separated sub- sequently , and this i-s preferable to the alternative , which would be required in the case of an oil impermeabl wall , of requiring periodic cleaning either by backwash or dismantling.
  • the resist ⁇ ance to gas flow across the said gas-permeable surface is adj ustable between predetermined minimum and maximum values .
  • the gas-permeable wall is a foraminous wall or sleeve by providing means for varying the effective aperture size of the aperture s in the foraminous wall or sleeve.
  • the aperture size is varied by the provision of a secondary foraminous wall or sleeve * closely adj acent the first and displaceable with res- pect thereto so that at least some of the apertures in the secondary wall or sleeve can be moved into or out of register with the apertures in the said wall or sleeve.
  • the second-ary foraminous sleeve is coaxial with the said foraminous sleeve adjustment can effectively be obtained by rel ative axi al displacement , although preferably the secondary foraminous sleeve is turn- able about its axis by means of a motor via a suitable drive transmission of the mixture through a selected number of the sep arator devices in dependence on the gas pressure , whereby to maintain the oil flow rate within certain values.
  • an excess pressure safety valve which opens if the pressure of the mixture in the app aratus exceeds a critical threshold value.
  • the plurality of separator devices are positioned as an annular array with their axes upright around a central oil collection chamber interconnected with the individual oil collection means which collect oil from the gas galleries.
  • This oil collection chamber is preferably also connected to the inlet of one or more of the separator devices whereby to recycle the oil collecting therein through that separator device or those separator devices to be passed to the said oil delivery duct.
  • the pressure to drive the oil from the said oil collection chamber to be recycled through one or more of the separator devices is conveniently derived from sep arated gas drawn from the gas collection duct leading from an ⁇ other of the separator devices in the array.
  • the apparatus of the present invention may further include a safety valve positioned in the drill string at such a level that it will be between the sea bed and the surface when the final breakthrough into the oilfield occurs.
  • This safety valve is preferably in the form of a single gas separator device as defined above in a series in the drill string at a submarine position as mentioned above , the gas gallery of the separator device having one or a plurality of unidirectional pres ⁇ sure relief valves which are set to open upon the attain ⁇ ment in the gallery of a pressure above a certain thres ⁇ hold value.
  • the gas-permeable wall constituting part of the flow path of the mixture may have a predetermined fixed eff ⁇ ective area , and therefore a fixed resistance to the flow of gas therethrough although since the ratio of gas and oil in the mixture varies considerably and large gas "bubbles" frequently arrive at the well head with the oil , thereby causing rapid and strong fluctuations in the pressure it may be advantageous to be able to vary the effective area of the gas-permeable wall. This may be achieved , for example , by varying the proportion of the wall area occupied by the gas apertures.
  • One of the known measures taken to counteract the detri ⁇ mental e££ects of such variation in the pressure is to provide an extremely strong valve at the well head to serve as a blow ' off prevention valve (this is housed in an assembly known as the BOP stack) which valve is closed rapidly when the approach of gas bubbles in the oil like ⁇ ly to cause sudden and damaging fluctuations in the pres ⁇ sure is detected by sensors in the drill string and at the well head.
  • the separator may be cons ⁇ gagted in such a way that the resistance to gas flow can be varied to accommodate variations in the gas and oil pressures experienced at the well head.
  • a sep arator device for separating gas from oil in a mixture thereof at high pressure , such as the well head of an oil well , and having a flow p ath for the mixture a substanti al part of the surface area of which is defined by a gas-permeable surface , is provided with means by which the resistance to gas flow across the surface is adjustable between predetermined minimum and maximum values.
  • Such adjustment of the resistance to flow of the gas-permeable surface may be achieved in a number of ways.
  • the gas-permeable surface is constituted by a foraminous wall or sleeve surrounding a central core and defining the flow path for the mixture , there may be provided means for varying the effective aperture size of the apertures in the foraminous wall or sleeve.
  • the aperture size or the number of apertures which are open may for example be varied by the.
  • provision of a second- ary foraminous wall or sleeve closely adj cent the first and displaceable with respect thereto so that at least some of the apertures in the secondary wall or sleeve can be moved into or out of register with the apertures in the said wall or sleeve.
  • a secondary filtering system may also be provided for separating residual oil entrained with the gas passing through the foraminous wall.
  • Such filtering systems may incorporate a plurality of passages and oil traps allowing the gas to exp and on its passage therethrough whilst collecting oil for delivery to -an appropriate oil duct.
  • the gas flow p assage is constituted by a core with helical grooves there in closely surrounded by a foraminous sleeve , and the sec- ondary sleeve is closely fitted around the said foraminous sleeve and rotatable about
  • Rotation of the secondary sleeve may be effected automatically , via a suitable drive and transmission in dependence on signals received from sensors in the drill string and/or at the well head operabl e to detect the approach of gas bubbles or regions of strongly varying pressure so that the effective gas passage area in the foraminous sleeve can be substantially increased to accommodate the extr a gas flow occurring when such bubbles arrive at the well head.
  • Figure 1 is a perspective view of apparatus in ⁇ corporating a plurality of separator devices of the present invention
  • Figure 2 is an axi al view of a first embodiment of the separator app ar atus illustrated in Figure 1 ;
  • Figure 3 is a cross sectional view taken on the line III-III of Figure 2;
  • Figure 4 i s an axial section of a drill string s afety valve incorporated in the separator apparatus of the presen t invention
  • Figure 5 is an axial sectional view through a sep arator device formed as a second embodiment of the present invention
  • Figure 6 is a diagram illustrating a suitable arrangement of apertures in the separator device of Figure 5 to pro ⁇ vide a variable flow resistance
  • Figure 7 illustrates a further separator sleeve structure
  • Figure 8 is a cross sectional view of a part of the sleeve of Figure 7.
  • the apparatus as generally indicated comprises a base support framework 1 1 having a support platform 1 2 above which proj ects an array of six separator devices , each generally indicated 13 , and below which is located an input flow coupling 14 , for the mixture of oil and gas to be separated , and a gas flow control valve arrangement generally indicated. 15.
  • Each gas/oil separator device 13 has two outlets 1 6 ,17 at its upper end , the outlets 1 6 comprising oil delivery ducts and the outlets 17 comprising gas collection ducts which lead to a common gas header 1 8 from which extends a gas delivery duct 19.
  • Each separator col ⁇ umn 1 3 comprises an outer cylindrical casing 20 flanged at each end for connection to the support surface 1 and a header assembly 21 at the lower and upper ends respective ⁇ ly.
  • a cylindrical foraminous sleeve 22 Within the cylindrical casing 20 and coaxial there- with is a cylindrical foraminous sleeve 22 housing a core 23 having six helically extending upstanding ridges 24 which define between them six shaliGw helical channels 27 ( see Figure 3 ) .
  • the diameter of the core 23 is such that the radially outer surfaces of the ridges 24 are a close ' fit within the inner surface of the foraminous sleeve 22 so that the helical channels 27 within the sleeve 22 are sep arate from one another throughout the whole length of the core 23 which extends axi ally the full l ength of the outer c asing 20 from the lower to the upper fl ange thereo
  • the perforations in the foraminous sleeve 22 may be reg ⁇ ularly spaced over the whole of the length of the sleeve or may follow a spacing pattern determined in a manner such as best to accommodate vari ations in pressure along the l ength of the flow p ath defined by the sep arator .
  • Each perforation is conveniently circul ar and in the reg ⁇ ion of i" di -ameter.
  • the rel ative di ameters of the outer casing 20 and the foraminous sleeve 22 are such that the flow cross section within the annul ar space between them is substanti lly greater than the flow cross section with ⁇ in the helical ducts defined between the foraminous sleeve 22 and the core 23.
  • the helical ducts have only one turn within the length of the core 23 ; in practice this may dif er , however , and ducts having a plurality of turns, may be employed.
  • the number of turns may be varied, in dependence on the conditions experienced at the well-head in order to obtain the best effect , and this can be achieved by interchanging the cores for oth ⁇ ers having a different pitch , or by constructing a var- iable pitch core.
  • each sep arator 1 3 The gas/oil mixture supplied to the lower end of each sep arator 1 3 is directed thereto by a respective mix ⁇ ture duct 25 extending from a control valve assembly , generally indicated 26 which receives gas and oil via a branching duct 23 from an input coupling 29.
  • each separator 13 To the upper flange of each outer cylindrical casing 20 of each separator 13 is connected a respective branch of gas header assembly 21 comprising a plurality of gas collection ducts 1 leading to a common gas delivery duct 19 hich , as can be seen in Figure 1 , extends cen ⁇ trally from the upper end of the apparatus.
  • Each foraminous sleeve 22 within the separator 13 has an imperforate section 30 at the upper end thereof which continues as an' oil delivery duct 31 leading to the oil delivery headers 16 of Figure 1. These latter may , of course , be joined to a common oil delivery pipe at a point downstream from the separating appar ⁇ atus .
  • a recirculating oil tank 32 Located centrally within the array of six separators is a recirculating oil tank 32 having inlets 33 connected by connection ducts 34 ( see Figure 3 ) to the lower ends of the cylindrical outer casings 20 of each of the four separators I 3.a , 13b , 13d , 13e.
  • the apparatus described above operates as follows.
  • the mixture of oil and gas in the condition at which it arrives at the well head of an oil well is supplied to the inlet coupling 28 from where it flows through the ducts 27 to the control valve assembly- 26.
  • This control valve assembly is operated in dependence on the current pressure and flow rate in the incoming material to open communication to one or more of the supply ducts 25 leading to the separators 13 a, 13b , 13d , 13_e.
  • the pressure and flow rate are high all the valves in the assembly 26 will be open so that all four sep ⁇ arator columns will be in operation.
  • At lower pres ⁇ sures one or more of the columns is shut off to com ⁇ pensate the apparatus for such variation so that the working pressures within the apparatus are miaintained , as far as possible , within predetermined values.
  • the core 23 is tapered for the initial part of the mixture flow path within the separator so that the change in flow cross section is progressive over an initial section.
  • the individual channels 27 have a flow cross section which is largely determined by the cylindrical inner surface of the fora i-nous wall of the outer sleeve 22 and the curved surface of the core 23. Only a very small proportion , less than 20%, of the overall surface area of the flow section is constituted by the radial walls of the ridges 24. Because of this , and because of the swirling action introduced by the helical flow path of the mixture the gas tends to collect at the radially outer part of the channels 27 whilst the oil flows up the radially inner part in contact with the surface of
  • control valve 39 in the duct 38 is pro ⁇ vided.
  • this is shown as a manually operated hand wheel gate valve , it will be appreciated that such valve may be operated automatically or remotely , and that by closing off the driving gas oil can collect in the sumps _at the lower end of the separators 1 3 , and can drain under the action of gravity into the recirculation tank 32 until sufficient has been collected to re-open the recircul ation separators
  • a further control on the apparatus can be obtained by interchanging the cores 23 for cores of different pitch. It is envisaged that cores having pitches of 2 t, 4ft, 6ft, and 8ft would be provided, these to be used in ⁇ dependently of one another in the assembled apparatus to increase or reduce the number of turns of the helix in the length of the separator to accommodate fluctuations in pressure and flow rate as the well varies.
  • FIG 4 there is-shown a submarine safety valve which is positioned in series in the drill string to be at a submarine level when the final breakthrough into the oilfield occurs.
  • the safety valve which is generally indicated 40, comprises an outer casing 41 which tapers from an upper end 42 to a lower or inlet end 43.
  • a generally cylindrical inner sleeve comprising a parallel sided cylindrical gas-permeable membrane -44 which may be of similar construction to the foraminous sleeve 22 in the gas/oil separator devices 13 illustrated in Figures 2 and 3.
  • the cylindrical sleeve 44 houses the core 45 h'aving a plurality of helically extending upstanding ridges defining between them shallow helical channels 47.
  • Each unidirectional valve 48 is set to the predetermined pressure in excess of the normal working pressure wihin the drill string so that if excess pressures occur, particularly on breaking through the final section of rock into the oilfield, the drill rig itself will be relieved of the surge since this will be released through the valves 48.
  • the valves 48 will remain closed and the safety device will act simply as a section of the hollow drill string allowing the slurry, mud and gas to pass through it without any ' change.
  • Sensors 50 may be provided in the region between the safety valve 40 and the surface to detect the release of gas bubbles through the valves 48 so that a surge in pressure giving rise to such pressure relief action can be detected before it reaches the rig and appro ⁇ priate action can be taken.
  • the alternative separator device sho * wn therein comprises a generally cylindrical support casing mounted on a platform base 52 which also supports a base structure 53.
  • the base 53 supports a cylindrical sleeve 54 surround ⁇ ing a central core 55 having a plurality of helical grooves formed therein.
  • the core 55 is tapered at its lower end and enters the mouth of a venturi block 56 secured to the platform 52 and constituting an entrance coupling to the-separator for connection to the upper end of a delivery pipe from a blow off prevention valve (BOF stack, not shown) at the well head.
  • the internal flow passage within the venturi block 56 is shaped with- a smoothly curved constriction such that the flow path from the BOP stack is divided at the entrance * end of the central core 55 having the helical grooves without creating turbulence.
  • the sleeve 54 surrounds the core 55 and over the maj ⁇ ority of its length has a plurality of apertures 65-.
  • a secondary sleeve 57 which also has a plurality of apertures the spacing of which is different from that of the apertures in the sleeve 54.
  • the outer sleeve 57 is a sliding fit over the inner sleeve 54 and is supported oh an annular support 58 carried by a support member 59 having a ring of gear teeth 60 which mesh with pinions 61 driven by a shaft 62 from a motcr 63.
  • the motor 63 may be a stepping motcr.
  • a cylindrical cham ⁇ ber 64 which houses a secondary oil separation filter of any suitable type; in the illustrated e ⁇ bbdiments it comprises a tubular -spir l filter bank of high ten- sile nickel-titanium tubes arranged in six peripherally adjacent part-cylindrical banks.
  • a further bank of separator cartridges in the form of an array of platelets in a honeycombed structure.
  • the spiral tubular filter banks 64 and the outer honeycomb structure 74 are both arranged to trap the oil entrained with gas passing through the apertures in the sleeves 54,57.
  • the aper ⁇ tures in the sleeve 54 are spaced by a distance d rom one another in a regular array both in the peripheral and the axial direction.
  • the apertures in the sleeve 57 although being spaced regularly by the sep ⁇ aration d in the axial direction, have an irregular spacing in the peripheral direction, some being spaced by the distance d some by d/2 and some by d/3.
  • the pattern illustrated in Figure 2 can be considered to repeat around the periphery of the sleeve 57.
  • the sleeve 57 can be pos ⁇ itioned in a first position in which all the apertures 65 in the inner sleeve 54 have a corresponding aperture 66 in register therewith.
  • the aperture 66 can be displaced out of register ⁇ with the aperture 65 to bring an aperture 67 in register with one of the four apertures 65 of the sleeve 56.
  • only one quarter of the apertures 65 are open, the remainder being closed by the adjacent sleeve 57. Further movement of the sleeve 57 until the apertures 68 are in register vith two of the apertures
  • the sleeve 57 allows one "hai-F of the apertures 65 to be open whilst the remainder are -closed.
  • the pattern of apertures in the sleeve 57 four positions in which one , two , three or four apertures 65 from each set of four thereof can be selectively opened by bringing an appropri ate aperture from the sleeve 57 into register therewith thereby allowing for a four-fold vari ation in resistance which can be accommodated by the separator to be obtained.
  • the sleeve 57 will be set with two or one of each set of four apertures open , and would be turned to open three or four apertures as necessary to accommodate an increase in pressure when gas bubbles arrive at the well head.
  • FIG. 7 and 8 there is shown a perforated sleeve suitable for repl acing the per- forated sleeve 56 in the embodiment of Figure 5 or , indeed , in the embodiment of Figure 2.
  • This sleeve is generally indicated with the reference numeral 71 • It has a helical row of apertures 72 having delimit- ed axial extent , that is transverse the length of the helically extended row. Two further rows 73 , 74 are intercalated therewith to form a triple start helix.
  • the wall portion of the sleeve 71 between adj acent rows of apertures 72 , 73 or 73 ,74 is im- perforate.
  • Figure 8 illustrates the cross sectional shape of a channel 75 formed within a core 76 closely fitting within the sleeve 71 in the same way as the core 55 fits wi thin the sleeve 56 in the embodiment of Figure 5.
  • the spir-al groove 75 has a tri angul ar cross section defined by a substantially radi al wall 77 and an - *
  • FIG. 8 can be seen two of the apertures in the rows 72 , indicated 72_a , 72b_ , and these , as illustrated in. Figure 7 , are eliptical with the ma or axis perpendicular to the length of the sleeve 71 . As can be seen in Figure 8 the row of apertures 72 is aligned with that portion of the groove 76 adj acent the apex of the triangle remote from the side 77.
  • the c, eaning of the gas foil separator device shown can be programmed to take place regularly, after a certain flow has passed, this being detected by ultrasonic sensors 75, 76, located o 'the outer caang wall 77. and " on the ma in .cylindrical support casing 51.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separating Particles In Gases By Inertia (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Degasification And Air Bubble Elimination (AREA)
  • Fats And Perfumes (AREA)

Abstract

Un separateur permettant la separation du gaz d'un melange petrole/gaz tel que dans une tete de puits de petrole comprend un ou plusieurs dispositifs separateurs (13) chacun comprenant principalement une paroi perforee composee d'une chemise (22; 56) entourant un noyau solide s'adaptant etroitement (23) et possedant une pluralite de canaux helicoidaux definissant des chemins d'ecoulement aplatis delimites sur une face principale par la chemise perforee (22; 56) de sorte que le gaz peut s'echapper dans une galerie de gaz (20) tandis que le petrole s'ecoule dans les canaux helicoidaux vers un collecteur de petrole (16). Une chemise perforee exterieure secondaire (57) peut etre prevue pour modifier la resistance effective de la paroi perforee par un deplacement relatif par rapport a la premiere chemise mentionnee (56), ce qui provoque une variation du recouvrement des ouvertures dans les deux chemises.
PCT/GB1982/000182 1981-06-18 1982-06-18 Separateur petrole/gaz WO1982004405A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DK65583A DK65583A (da) 1981-06-18 1983-02-15 Separator til separering af gas fra olie

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
GB8118790 1981-06-18
GB8118790 1981-06-18
GB8125389 1981-08-19
GB8125389 1981-08-19
GB8214749 1982-05-20
GB8214749820520 1982-05-20

Publications (1)

Publication Number Publication Date
WO1982004405A1 true WO1982004405A1 (fr) 1982-12-23

Family

ID=27261208

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1982/000182 WO1982004405A1 (fr) 1981-06-18 1982-06-18 Separateur petrole/gaz

Country Status (7)

Country Link
EP (1) EP0093719A1 (fr)
JP (1) JPS58501619A (fr)
AU (1) AU553365B2 (fr)
DK (1) DK65583A (fr)
GB (1) GB2101496B (fr)
NO (1) NO830543L (fr)
WO (1) WO1982004405A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0147215A2 (fr) * 1983-12-21 1985-07-03 R. Goodwin International Ltd Séparation de fluide/fluide
EP0677314A1 (fr) * 1994-04-15 1995-10-18 Consolidated Papers, Inc. Dispositif de séparation air/gaz
WO1998041732A1 (fr) * 1997-03-18 1998-09-24 Total Dispositif de tete de puits pour la retention des particules solides entrainees par le fluide de production

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HU200285B (en) * 1987-03-04 1990-05-28 Tatabanyai Banyak Vallalat Cross-flow liquid filter operating under pressure
US7596996B2 (en) 2007-04-19 2009-10-06 Fmc Technologies, Inc. Christmas tree with internally positioned flowmeter
FR2915403B1 (fr) * 2007-04-26 2009-07-24 Saipem S A Sa Dispositif de separation liquide/gaz et procede de separation liquide/gaz, notamment les phases liquide et gazeuse d'un petrole brut
FR3016802B1 (fr) * 2014-01-29 2016-02-19 Saipem Sa Installation modulaire et procede de separation liquide/gaz, notamment des phases liquide et gazeuse d'un petrole brut.

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE713354C (de) * 1939-01-24 1941-11-07 Schiff Und Maschb Akt Ges Deut Vorrichtung zum Entgassen und Entdampfen von Fluessigkeiten, insbesondere von Kesselspeisewasser
DE891227C (de) * 1943-09-21 1953-09-24 Bayerische Motoren Werke Ag Zentrifuge zur Trennung von Gasen und Fluessigkeit
US2705053A (en) * 1953-05-14 1955-03-29 Doak Aircraft Co Inc Oil degasification
DE1180884B (de) * 1959-08-04 1964-11-05 Glanzstoff Ag Vorrichtung zur Entfernung fluechtiger Bestandteile aus viskosen Fluessigkeiten, insbesondere Polykondensaten
US3318383A (en) * 1964-10-27 1967-05-09 Par A Gone Inc Apparatus for cold treating mineral oil
US3386230A (en) * 1966-12-27 1968-06-04 Donaldson Co Inc Liquid and gas separator
US3731742A (en) * 1971-03-17 1973-05-08 Otis Eng Corp Well flow controlling method, apparatus and system
FR2340121A1 (fr) * 1976-02-03 1977-09-02 Messerschmitt Boelkow Blohm Dispositif pour la separation des gaz en vue de les extraire des liquides
GB2063108A (en) * 1979-09-28 1981-06-03 Bethune D Degassing device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE713354C (de) * 1939-01-24 1941-11-07 Schiff Und Maschb Akt Ges Deut Vorrichtung zum Entgassen und Entdampfen von Fluessigkeiten, insbesondere von Kesselspeisewasser
DE891227C (de) * 1943-09-21 1953-09-24 Bayerische Motoren Werke Ag Zentrifuge zur Trennung von Gasen und Fluessigkeit
US2705053A (en) * 1953-05-14 1955-03-29 Doak Aircraft Co Inc Oil degasification
DE1180884B (de) * 1959-08-04 1964-11-05 Glanzstoff Ag Vorrichtung zur Entfernung fluechtiger Bestandteile aus viskosen Fluessigkeiten, insbesondere Polykondensaten
US3318383A (en) * 1964-10-27 1967-05-09 Par A Gone Inc Apparatus for cold treating mineral oil
US3386230A (en) * 1966-12-27 1968-06-04 Donaldson Co Inc Liquid and gas separator
US3731742A (en) * 1971-03-17 1973-05-08 Otis Eng Corp Well flow controlling method, apparatus and system
FR2340121A1 (fr) * 1976-02-03 1977-09-02 Messerschmitt Boelkow Blohm Dispositif pour la separation des gaz en vue de les extraire des liquides
GB2063108A (en) * 1979-09-28 1981-06-03 Bethune D Degassing device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0147215A2 (fr) * 1983-12-21 1985-07-03 R. Goodwin International Ltd Séparation de fluide/fluide
WO1985002782A1 (fr) * 1983-12-21 1985-07-04 R Goodwin International Ltd. Separateur fluide/fluide
EP0147215A3 (fr) * 1983-12-21 1985-08-28 R. Goodwin International Ltd Séparation de fluide/fluide
EP0677314A1 (fr) * 1994-04-15 1995-10-18 Consolidated Papers, Inc. Dispositif de séparation air/gaz
WO1998041732A1 (fr) * 1997-03-18 1998-09-24 Total Dispositif de tete de puits pour la retention des particules solides entrainees par le fluide de production
FR2761109A1 (fr) * 1997-03-18 1998-09-25 Total Sa Dispositif destine a equiper la tete d'un puits de production d'un fluide, en vue de retenir les particules solides entrainees par ce fluide
US6263970B1 (en) 1997-03-18 2001-07-24 Total Fina S.A. Wellhead device for retaining the solid particles carried by the production fluid

Also Published As

Publication number Publication date
AU553365B2 (en) 1986-07-10
AU8528282A (en) 1983-01-04
GB2101496A (en) 1983-01-19
DK65583D0 (da) 1983-02-15
JPS58501619A (ja) 1983-09-29
NO830543L (no) 1983-02-17
EP0093719A1 (fr) 1983-11-16
DK65583A (da) 1983-02-15
GB2101496B (en) 1985-12-04

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