WO2011129704A2 - Dispositif à orifice variable - Google Patents

Dispositif à orifice variable Download PDF

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Publication number
WO2011129704A2
WO2011129704A2 PCT/NO2011/000123 NO2011000123W WO2011129704A2 WO 2011129704 A2 WO2011129704 A2 WO 2011129704A2 NO 2011000123 W NO2011000123 W NO 2011000123W WO 2011129704 A2 WO2011129704 A2 WO 2011129704A2
Authority
WO
WIPO (PCT)
Prior art keywords
valve device
valve
regulating element
orifice
flow passage
Prior art date
Application number
PCT/NO2011/000123
Other languages
English (en)
Other versions
WO2011129704A3 (fr
Inventor
Magnar Tveiten
Erling Kleppa
Øyvind STOKKA
Original Assignee
Petroleum Technology Company As
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 Petroleum Technology Company As filed Critical Petroleum Technology Company As
Publication of WO2011129704A2 publication Critical patent/WO2011129704A2/fr
Publication of WO2011129704A3 publication Critical patent/WO2011129704A3/fr

Links

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
    • E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
    • E21B43/121—Lifting well fluids
    • E21B43/122—Gas lift
    • E21B43/123—Gas lift valves

Definitions

  • the present invention relates to a device which is typically used in connection with oil and gas wells with the object to enhance the production, and more particularly the present invention concerns a pressure operated valve which is capable of vary- ing a fluid flow through the valve.
  • a gas under high pressure is injected into the annular space between the casing and the tubing.
  • a pressure-controlled valve a so-called gas lift valve, is usually employed in openings between the annulus and the production tubing in order to be able to supply and control or check the amount of gas flowing into the actual tubing.
  • Pressure-controlled valves of this kind can also be used during a well start-up phase, where completion fluid can be found in both the well's annulus and in the tubing. In order to start production in such a well, completion fluid must be displaced from the annulus, through one or more of these pressure-controlled valves, and up to the surface through the tubing.
  • the gas lift valve(s) can be controlled or checked according to several different principles, for example by a pressure, where it is the pressure differential round and/or across the valve which permits a controlled opening or closing of the valve.
  • valves where one may have an opening which varies over time.
  • US 3,888,273 where there is described a gas lift valve for use in oil wells utilizing a variable flow orifice with the amount of flow area being inversely proportional to the different in pressure between casing and the tubing.
  • Other examples of valves with variable orifice is described in US 6,200,645, US 5,618,022, GB 2 354 270 and US 4,869,100.
  • the object of the present invention is therefore to provide a device for controlling the injection of a fluid into a tubing in a gas and/or oil well. Where this device is adjustable dependent on the surroundings in the well, i.e. having a variable orifice, and which is easily and possibly self adjustable.
  • Another object of the present invention is to provide a device which is capable of operating within a predefined pressure area.
  • the present invention relates to a valve device, where the valve device comprises an outer hollow housing with at least one inlet and at least one outlet, where the inlet and outlet being connected with an internal passage, forming a flow passage.
  • An orifice is being arranged in connection with the flow passage. There may be more than one inlet and more than one outlet. The orifice will be the element regulating the amount of flow through the flow passage and therefore through the device, when there is a flow through the device.
  • the valve device comprises a pressure sensitive device comprising a bellows, where the pressure sensitive device is connected to a regulating element. By being connected one should understand that they are linked to each other physically, and movement of the pressure sensitive device will influence the regulating device directly.
  • the bellows When the bellows is exposed to an external pressure from a fluid flowing into the valve device through the at least one inlet, the bellows will extend or retract and thereby control a movement of the regulating element relative the orifice, in order to vary a cross section of flow of the orifice.
  • the pressure sensitive device, the regulating element and the orifice may be configured such that with an increase in pressure in the fluid acting on the pressure sensitive device the orifice becomes larger when there is a flow through the device. Alternatively they may be configured to give an opposite effect.
  • the valve device may also comprises a pressure controlled valve being arranged within the flow passage and downstream of the orifice.
  • the pressure controlled valve is formed by a section of the outer housing of the valve device and comprises further an internal movable body provided with an internal bore, one end of the internal movable body being closed and an opposite end being open, forming an inlet.
  • At least one outlet is provided over a periphery of the internal movable body, such that the inlet, the at least one outlet and the internal bore form a flow passage through the internal movable body, thereby also forming a part of the flow passage through the valve device according to the invention.
  • the internal movable body is arranged movable within the outer housing.
  • the valve device according to the present invention also comprise a valve seat arranged inside the housing, where the valve seat is adapted to cooperate with an annular valve element sealing surface formed on the internal movable body, thereby forming the sealing elements of the pressure controlled valve.
  • a pressure in the fluid at the inlet of the valve device according to the invention will flow into the valve device and through the orifice and act on the internal movable body. When there is a given pressure difference from the inlet to the outlet of the internal movable body this will move to open or close the pressure controlled valve within the valve device.
  • this pressure controlled valve device is in an open state there will be a flow of fluid through the valve device, where the amount of this flow of fluid is regulated by the variable opening of the orifice.
  • the orifice in the valve device is the inlet of the internal movable body.
  • the orifice of the valve device is also movable relative the outer housing.
  • the internal movable body will normally have two positions, open or closed position of the pressure controlled valve.
  • the regulating element may be provided as a solid structure or as a hollow structure.
  • the regulating forms a stem like portion.
  • This stem like portion may be hollow or solid.
  • the stem like portion will in such an embodiment interact with the orifice to regulate the opening of this.
  • the regulating element may be provided with a tapered end, where this end may be arranged on the opposite end of the connection with the bellows.
  • the above discussed solid structure may be provided with an internal bore over at least a part of its length, where a plurality of through holes are provided over the structures periphery and length.
  • the internal bore and the through holes such arranged that the form a flow passage through the regulating element.
  • the regulating element may be more sleeve- formed. This sleeve may be arranged outside or possibly within the outer housing. The sleeve may be formed with a plurality of through going holes.
  • the amount of holes in the sleeve aligned with an inlet in the housing, which in this embodiment forms the orifice in the valve device, is regulated and thereby regulating the opening of the orifice of the valve device.
  • the sleeve will be connected to the pressure sensitive device, with the bellows, as in the other embodiment of the invention to regulate the movement of the sleeve in accordance with a pressure in a fluid acting on the bellows.
  • the regulating element is a hollow device, where the regulating element is comprised of several parts.
  • a first part is formed as an annular hollow cylinder, where a number of holes are arranged over the length and periphery of the annular hollow cylinder.
  • the annular hollow cylinder has a tapered end such that the tapered end can be connected to a smaller diameter annular hollow cylinder, where also this annular cylinder is provided with a tapered end.
  • the regulating element has preferably a circular cross section, but may also have other polygonal cross sections.
  • the regulating element may be provided with a variable cross sectional area over a part of its length, when seen in an axial direction of the regulating element.
  • the axial direction of the regulating element will in most cases coincide with a main flow passage direction through the valve device.
  • the orifice may also be provided with a variable cross sectional area, when seen in the longitudinal direction of the flow passage through the orifice.
  • the orifice is formed with a cross sectional area that is larger than the cross sectional area of the regulating element.
  • the pressure sensitive device is connected to the regulating element through an anchorage point.
  • an annular plate To the anchorage point is also attached an annular plate, where the cross section of the annular plate is substantially the same as the internal passage in the outer housing.
  • the annular plate is further arranged between a pair of end stoppers, where the end stop- pers also are arranged in the internal passage of the outer hollow housing.
  • the end stoppers are arranged spaced from each other, thereby only allowing the annular plate to travel between them. This arrangement will provide a predetermined travel for the regulating element, thereby providing a movement of the regulating element relative to the orifice.
  • the bellows will, due to exposure to the external pressure from the fluid influence the movement of the regulating element.
  • Figure 1 is a longitudinal cross section of a first embodiment of the valve device according to the present invention
  • Figure 2 is a longitudinal cross section of a second embodiment of the valve device according to the present invention
  • Figure 3 is a longitudinal cross section of another embodiment of the valve device according to figure 2.
  • valve device according to the present invention, where the valve device is intended to be installed in a tubing. A person skilled in the art will understand how this is done and it is therefore not covered in the description.
  • valve device As the three different embodiments of the present invention are based on the same principles, only the differences between the different embodiments will be described and explained. If one or more of the different elements of the valve device is/are formed or constructed in the same way, this or these elements will not be explained further.
  • valve device 1 comprises an outer hollow housing 2, which outer hollow housing 2, for the sake of simplicity, is shown as a single element. However, is should be understood that the outer hollow housing 2 also could be comprised of several elements.
  • the outer hollow housing 2 is provided with one inlet 3 and outlet (not shown). At one of its end the outer hollow housing 2 is closed by an end plate 5. Inside the outer hollow housing 2, and towards the end plate 5 is arranged a pressure sensitive device 6 in form of a bellows element. At an opposite end of the end plate 5, inside the outer hollow housing 2, is arranged an internal valve seat 4.
  • the valve seat 4 is adapted to cooperate with an annular valve element sealing surface 7 formed on an internal movable body 8 that is arranged inside the outer hollow hous- ing 2. In a closed state of the valve device 1 the annular valve element sealing surface 7 will therefore abut against the valve seat 4. However, since the internal movable body 8 can be moved axially in the outer hollow housing 1, the internal movable body's 8 position can be changed to a position where the annular valve element sealing surface 7 is brought out of abutment with the valve seat 4, thereby forming a fluid connection between the at least one inlet 3 and outlet (not shown) of the valve device 1. In this embodiment the inlet 3 is composed of one or more through holes arranged over the valve device's 1 periphery.
  • the outlet is composed of one or more through holes, where the one or more through holes are arranged to have an angled flow out of the valve device 1.
  • the inlet 3 and the outlet are arranged on opposite sides of the valve seat 4 in all shown embodiments of the valve device 1.
  • An elastic element 9 is arranged between a shoulder 10 of the outer hollow housing 2 and a shoulder 11 of the internal movable body 8. This arrangement will bias the annular valve element sealing surface 7 towards the valve seat 4 thereby closing the valve device 1. However, when the pressure differential across the internal movable body 8 reaches a set limit, the internal movable body 8 will be moved against the elastic element 9 thereby opening the valve device 1.
  • the internal movable body 8 is formed with an internal bore 13, where an orifice 12 arranged on one end of the internal movable 8 forms part of the internal bore 13.
  • Opposite end of the internal movable body 8 is closed by a plate (not shown), where this plate form an internal bottom of the internal movable body 8. Further, the internal movable body 8 is provided with at least one outlet 14, where the outlet 14 is arranged in vicinity of the closed end of the internal movable body 8.
  • the pressure sensitive device 6 is attached by means of an attachment means to the end plate 5.
  • a regulating element 15 is connected to the pressure sensitive device 6 through an anchorage point 16.
  • To the anchorage point 16 is also attached an annular plate 17, where the diameter of the annular plate 17 is substantially the same as the inner diameter of the outer hollow housing 1.
  • the annular plate 17 is arranged between a pair of end stoppers on the inside of the outer hollow housing 1.
  • the pair of end stoppers is arranged with a distance between each other, thereby only allowing the annular plate 17 to travel between the pair of end stoppers 18.
  • the pressure sensitive device 6 is comprised of a number of composite sections or discs, where the sections or discs are arranged to an accordion-shaped and closed unit.
  • the pressure sensitive device is furthermore filled with an incompressible fluid. Due to its form, the pressure sensitive device 6 can be extended or retracted in its axial direction when influenced by a force.
  • the regulating element 15 is provided with a tapered end 19. Furthermore, the regulating element 15 will, with exception for the tapered end 19, have a diameter that is smaller than the diameter of the orifice 12, thereby letting a fluid to flow between the orifice 12, and the regulating element 15 when the valve device 1 is in a closed position. The tapered end 19 of the regulating element 15 will then be situated inside the internal movable body 8.
  • the outer hollow housing 2 there is also provided at least one through hole 20, which through hole 20 connects the exterior and interior of the outer hollow housing 2.
  • the through hole 20 forms a connecting point for a hydraulic supply line (not shown), which supply line is used for supplying a fluid to the inside of the outer hollow housing 2.
  • the fluid may also be under pressure.
  • FIG. 2 illustrates a second embodiment of the valve device 1 according to the pre- sent invention.
  • the regulating element 15 is not a solid regulating element, but a hollow regulating element provided with a number of through holes over the length and periphery of the regulating element 15.
  • the tapered end 19 of the regulating element 15 is provided with an outlet 22, such that fluid, when entering the outer hollow housing 1 through the inlet 3, can flow into the regulating element 15 and through the regulating element 15 and out through the outlet 22.
  • the orifice 12 is provided with a cross section area that is substantially larger than a cross section area of the regulating element, whereby this will provide a constant open communication over the orifice.
  • Figure 3 shows a third embodiment of the valve device 1 according to the present invention, where the regulating element 15 is comprised of several parts.
  • a first part is formed as an annular hollow cylinder 151, where a number of through holes 22 is arranged over the length and periphery of the annular hollow cylinder 151.
  • the annular hollow cylinder 151 is formed with a tapered end 152.
  • the annular hollow cylinder 151 has a diameter the substantially corresponds to the inner diameter of the outer hollow housing 2.
  • the tapered end 152 is further connected to a smaller diameter annular hollow cylinder 153, where the annular hollow cylinder 153 is provided with the tapered end 19.
  • outer hollow housing may be designed as one unit or it may be composed of several connected elements.
  • the valve device should furthermore have suitable devices for connection or mounting in a process fluid flow.
  • a skilled person will furthermore appreciate that several versions and modifications of the described and illustrated embodiment may be provided within the scope of the invention as defined in the attached claims.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (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)
  • Safety Valves (AREA)
  • Fluid-Driven Valves (AREA)

Abstract

La présente invention concerne un dispositif (1) de soupape destiné à être utilisé dans un puits de forage, le dispositif (1) de soupape comportant une enveloppe extérieure creuse (2) dotée d'au moins une entrée (3) et une sortie, l'entrée ou les entrées et sorties étant reliées par un passage interne formant un passage d'écoulement, un orifice (12) étant pratiqué en liaison avec le passage d'écoulement. Selon l'invention, le dispositif (1) de soupape comporte en outre un dispositif sensible à la pression comprenant un soufflet (6) et relié à un élément régulateur (15), l'exposition du soufflet (6) à une pression extérieure exercée par un fluide entraînant un mouvement de l'élément régulateur (15) par rapport à l'orifice (12) afin de faire varier une section utile d'écoulement de l'orifice (12).
PCT/NO2011/000123 2010-04-14 2011-04-13 Dispositif à orifice variable WO2011129704A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20100529A NO20100529A1 (no) 2010-04-14 2010-04-14 ventilanordning med variabel strupeapning
NO20100529 2010-04-14

Publications (2)

Publication Number Publication Date
WO2011129704A2 true WO2011129704A2 (fr) 2011-10-20
WO2011129704A3 WO2011129704A3 (fr) 2012-08-23

Family

ID=44626131

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2011/000123 WO2011129704A2 (fr) 2010-04-14 2011-04-13 Dispositif à orifice variable

Country Status (2)

Country Link
NO (1) NO20100529A1 (fr)
WO (1) WO2011129704A2 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3888273A (en) 1974-01-21 1975-06-10 Dresser Ind Variable orifice gas lift valve
US4869100A (en) 1988-07-22 1989-09-26 Birdwell J C Variable orifice control means
US5618022A (en) 1996-09-16 1997-04-08 Wallace; Glenn E. Variable orifice valve
US6200645B1 (en) 1997-02-25 2001-03-13 Schnectady International Inc. Polyester resin impregnating and coating solutions and their use
GB2354270A (en) 1998-09-14 2001-03-21 Baker Hughes Inc Adjustable orifice valve

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2342301A (en) * 1942-04-15 1944-02-22 Oil Lift Supply Company Gas lift valve
US3066690A (en) * 1959-10-16 1962-12-04 Camco Inc Well injection and bleed valve
US3131644A (en) * 1960-11-14 1964-05-05 Pan American Petroleum Company Gas lift apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3888273A (en) 1974-01-21 1975-06-10 Dresser Ind Variable orifice gas lift valve
US4869100A (en) 1988-07-22 1989-09-26 Birdwell J C Variable orifice control means
US5618022A (en) 1996-09-16 1997-04-08 Wallace; Glenn E. Variable orifice valve
US6200645B1 (en) 1997-02-25 2001-03-13 Schnectady International Inc. Polyester resin impregnating and coating solutions and their use
GB2354270A (en) 1998-09-14 2001-03-21 Baker Hughes Inc Adjustable orifice valve

Also Published As

Publication number Publication date
WO2011129704A3 (fr) 2012-08-23
NO20100529A1 (no) 2011-10-17

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