(19)
(11)EP 2 304 169 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
06.12.2017 Bulletin 2017/49

(21)Application number: 09757422.2

(22)Date of filing:  27.05.2009
(51)International Patent Classification (IPC): 
E21B 33/04(2006.01)
E21B 19/22(2006.01)
E21B 43/12(2006.01)
(86)International application number:
PCT/EP2009/056448
(87)International publication number:
WO 2009/147040 (10.12.2009 Gazette  2009/50)

(54)

ASSEMBLY FOR USE IN A CHRISTMAS TREE

ANORDNUNG ZUR VERWENDUNG IN EINEM PRODUKTIONSKREUZ

DISPOSITIF POUR USAGE DANS UN ARBRE DE NOEL


(84)Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR

(30)Priority: 02.06.2008 DK 200800749
02.06.2008 US 58065 P

(43)Date of publication of application:
06.04.2011 Bulletin 2011/14

(73)Proprietor: MÆRSK OLIE OG GAS A/S
1263 Copenhagen K (DK)

(72)Inventor:
  • AGERBÆK, Martin, Kaster
    DK-6740 Bramming (DK)

(74)Representative: Zacco Denmark A/S 
Arne Jacobsens Allé 15
2300 Copenhagen S
2300 Copenhagen S (DK)


(56)References cited: : 
US-A- 2 632 513
US-A1- 2001 045 287
US-A- 5 337 828
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description


    [0001] The invention relates to an assembly suitable for use with a Christmas tree used with coiled tubing and other wellhead components.

    [0002] Coiled tubing gas lift is widely used in oil and gas production. The technology involves lowering of a coiled tubing string into the well. Gas is injected through the coiled tubing and into the oil stream at the bottom of the well to lift the oil to the surface. Oil and gas are traveling on the outside of the coiled tubing and flow to normal production facilities via a wellhead.

    [0003] US2001/045287 A1 describes a gas lifting method comprising the steps of: providing a production tubing to a production interval in a wellbore; providing a check valve in the production tubing at a lower end of the production tubing, the check valve effective to permit flow into the production tubing but not permit flow from the production tubing through the check valve; allowing liquids from the formation to flow into the production tubing; and after liquids from the formation have entered the production tubing, pressuring the production tubing with gas from below the level of the liquids from the formation and thereby forcing at least a portion of the liquids from the formation to the surface: and discontinuing pressuring the production tubing to allow liquids from the formation to again enter the production tubing.

    [0004] The wellhead is normally positioned at the top of the well. The wellhead terminates all the casings that are in the well and enables pressure monitoring and pumping into each casing annulus section. An assembly called an x-mas tree or a Christmas tree is located at the top of the wellhead.

    [0005] The Christmas tree is the assembly of gate valves, cokes, and fittings that controls the flow of oil or gas during production. Tree design is based on e.g. the production pressure and/or flow rates. The x-mas tree and wellhead are usually made up and installed as a unit.

    [0006] Valves located on the wellhead between the well head and the x-mas tree are called master valves. Christmas trees normally have at least one master valve; usually two are used. Having two master valves allow the use of the top master valve for normal use, thus reducing wear on the lower master valve which is the most difficult to replace.

    [0007] Replacement of the top master valve can be accomplished relatively easily by isolating the upper portion of the tree with the lower master valve. However, replacement of the lower master valve is a complicated operation which involves plugging off the well.

    [0008] In order not to block the master valves, coiled tubing gas lift operations involves, in known technique, that the coiled tubing must be terminated below the master valve.

    [0009] Therefore coiled tubing gas lift operations normally involve removal of the lower master valve and installation of a special tool called a wellhead spool. It is an object with the invention to provide a new assembly and to avoid the drawbacks involved with the known technique and to provide an alternative. The object of the invention is achieved by said assembly comprising: a housing having an exterior surface, a first end having an inlet channel and a second end having an outlet channel, said inlet and outlet channels being connected by a central flow passage for providing fluid communication between a well and said Christmas tree, said first end being connectable to a well being positioned below a connector, said housing further comprising a
    side-entry bore for providing fluid communication between said central flow passage and the external of said housing: a hanger tool being positioned in a well tubular below said side entry bore and supporting a coiled tubing, said hanger tool being provided with two separate fluid passages: a first fluid passage communicating with said coiled tubing, and a second fluid passage communicating with the annulus between said coiled tubing and said well tubular; an upper assembly to be inserted through the side entry bore; a tubular stinger tool having an upper section and a lower section, the lower section having a portion adapted to be inserted into the hanger tool, and the upper section having a portion being adapted for connection with said upper assembly to be inserted through said housing; the hanger tool and the stinger tool being mutually adapted such that said first fluid passage is being extended through the stinger to the upper section of said tubular stinger and said second fluid passage is being extended by the annulus created between said tubular stinger tool and said hanger tool, the upper assembly and the upper section of the tubular stinger being mutually adapted such that said first fluid passage is being further extended to the external of said housing and said second fluid passage is being further extended to the second end of the housing.

    [0010] Various other aspects of the invention are recited in the dependent claims.

    [0011] The invention will be described in greater details with reference to the accompanying drawings, wherein

    Fig, 1 schematically illustrates a prior art x-mas tree comprising two master (2, 2a) valves,

    fig. 2 shows a partial longitudinal section of the assembly inserted in a well tubular;

    fig. 3 is a schematic cross-sectional view of a housing with a tubular hanger inserted;

    fig. 4 is a schematic cross sectional view of a seal bore male part;

    fig. 5 is a schematic cross sectional view of an seal bore bonnet;

    fig. 6 is a schematic cross sectional view of master valve connected to a production tubing;

    fig. 7 is a schematic drawing of an embodiment of seat bore bonnets installed in a housing previously used for housing of a lower master valve;

    fig. 8 is a schematic drawing of an embodiment of flow port seat;

    fig. 9 is a schematic drawing of a housing being equipped with an locking mechanism according to another embodiment;

    fig. 10 shows a modified x-mas tree.



    [0012] It is common in the oilfield industry to insert a string of coil tubing into a wellbore. The coiled tubing may be used to solve a number of problems such as e.g. servicing. Coiled tubing may also be used to establish lift by injection of gas into the oil stream at the bottom of the well. Oil and gas are then traveling up the well on the outside of the coiled tubing and flows to normal production facilities.

    [0013] In figure 1 is shown a conventional well having a wellhead. On top of the wellhead is located in the shown embodiment a valve-tree called a Christmas tree.

    [0014] The valves (2, 2a) in the Christmas tree control the fluids from the oil well. In the Christmas tree there are normally two valves for closing off the well. However, Christmas trees may be equipped with only one master valve or even without master valves. Having two master valves allows the use of the top master valve for normal use, thus reducing wear on the lower master valve which is the most difficult to replace. In the shown embodiment the lower master (2) valve is of the hydraulically operated type, while the upper master valve (1) is manually operated.

    [0015] Replacement of the top master valve can be accomplished relatively easily by isolating the upper portion of the tree with the lower master valve. However, replacement of the lower master valve is a complicated operation which involves plugging off the well.

    [0016] In order not to block the master valves, coiled tubing gas lift operations involve, in known technique, that the coiled tubing must be terminated below the master valve.

    [0017] Therefore coiled tubing gas lift operations normally involve removal of the lower master valve housing, and since the weight of the master valves is high this normally involves dangerous crane operations which might interfere with well operations taking place in neighboring wells.

    [0018] Other prior art methods involve adding a special tool called a spool between the wellhead and the Christmas tree in order to accommodate a hanger for the coiled tubing.

    [0019] It is an object with the invention to provide a new assembly and to avoid the drawbacks involved with the known techniques.

    [0020] It is another object of the invention to provide an assembly which can be utilized without removal of the lower master valve housing.

    [0021] The functionality of a prior art master valve will now be described in greater details with reference to figure 6.

    [0022] In figure 6 is shown a master valve connected to a production tubing (5) being equipped with an internal profile (20). Providing of the internal profile (20) enables fastening of equipment as a plug or other equipment as e.g. a back pressure valve for use during Christmas Tree repair.

    [0023] The valves is in the shown embodiment a gate valve, but any other types of valves known to the skilled person might function as master valves.

    [0024] A central flow passage (3) intersects a side entry bore (2), extending from the external surface of the valve housing to a cavity (4). A gate 6, having a hole (not shown) through, can move from the open position shown in figure 6 to a closed position where a solid part of the gate (6) (shown at right side in figure 6) blocks the central flow passage (3). When the valve is closed, the through-going hole extends into the cavity (4).

    [0025] When the valve is fully open, it allows straight passage through the central fluid passage (3) having essentially the same size as the inside diameter of the production tubing (3). The internal parts of the valve are secured to the housing by partly bolts or screws and partly by seats (9) being inserted into recesses (9a) formed in the housing. The valve is, in the shown embodiment, operated by the hand wheel (7) but other types of actuation means known to the skilled man may be used (e.g. electric or hydraulic actuators).

    [0026] Turning now to figure 3, an embodiment of coiled tubing hanger tool will now be described.

    [0027] The coiled tubing hanger tool comprises in the shown embodiments, two main parts: a cross-over tool (30) to which the coiled tubing suspended (not shown) in the well is attached and a tubing hanger lock tool (12,13,14).

    [0028] The tubing hanger lock tool (12, 13, 14) provides the necessary force to secure the coiled tubing hanger tool in the well. The principal components of the tubing hanger lock, shown in fig. 3, are a so-called upper locking mandrel 12, an upper sub 13, a lock body 14 and locking dogs (11) which are capable of locking the tubing hanger lock assembly releasably in the hanger profile (20) in the production tubing. Tubing hanger locks like the one shown in figure 3 are well known to the person skilled in the art and their functionality will therefore not be described in greater details herein.

    [0029] In the lowermost (towards the well) part of the tubing hanger lock tool (12,13,14) is the cross-over too! (30) and it is usually fastened to the tubing hanger (12,13,14) by threads (Screwed on to the bottom of the lock body (14) but other fastening means may be used.

    [0030] The cross-over tool is provided with 2 separate channels (31 and 32) and the coiled tubing which is suspended in the well (not shown) is connected to the channel designated by reference numeral 31.

    [0031] The other channel with reference numeral 32 is in fluid communication with the annulus surrounding the suspended coiled tubing (not shown)

    [0032] Turning now to figure 2 an embodiment of a stinger part according to the invention installed into the hanger too! is described.

    [0033] In the shown embodiment a separate running tool known as a stinger tool (50) (or just stinger) is inserted into the hanger tool (12,13 14), and the lower part (towards the well) of the stinger tool (50) is connected to the cross-over tool (30). The lower part of the stinger tool (50) and the cross-over tool (30) are mutually adapted such that the stinger too! (50) can be inserted (slid) into a receptacle formed in the cross-over tool (30).

    [0034] The stinger tool (50) is provided with a central, internal fluid channel (51), which communicates with one or more openings provided in the upper end and the lower end (52) of the stinger tool, respectively.

    [0035] In one embodiment, the lower end of the stinger tool is provided with four holes (52).

    [0036] The upper end of the stinger tool is, in the shown embodiment, threaded into a female threaded seal bore male part (53). The details and functionality of the seal bore male part (53) will be described in greater detail with reference to figure 4.

    [0037] The stinger tool (50) has an outer cylindrical surface that has thereon a set of seal means (60) which cooperates with the receptacle in the cross-over tool such that seals are established on both sides of the openings (52) once the stinger is run into the cross-over too! (30). One or more pressure relief openings (90) provided in the cross-over tool enables insertion of the stinger tool into the cross-over tool. By preventing building up of pressure underneath the lowermost part of the stinger tool, these openings (90) also entail relief for the axial fixation of the stinger too! an thereby also reduce the forces acting on a locking mechanism (95) (shown in figure 2) which secures the assembly according to the invention in the housing.

    [0038] In figure 4 is shown a seal bore male part (53).

    [0039] The seal bore male part (53) is equipped with one or more inlet ports (57) which are in fluid communication with one or more corresponding internal channels (58). The internal channel(s) (58) lead to a central opening (61) formed in the underside of the seal bore male part (53). The upper part of the stinger (50) and the central opening (61) are mutually adapted such that the upper part of the stinger can be connected (screwed) into the opening (61) and thereby establishes fluid communication between the internal channel (51) in the stinger and the inlet ports (57) formed in the seal bore male part (53) when connected. Alternatively, the seal bore male part (53) may be provided with a (male) part which can be connected into an opening formed in the stinger (50).

    [0040] For providing a support for the locking mechanism (95) (shown in figure 2) the seal bore male part (53) is equipped with a recess (91) and an attachment part (59) formed in its upper side.

    [0041] Turning now to figure 5 a sea! bore bonnet (40) is shown.

    [0042] The seal bore bonnet comprises two parts, one (75) for sealing of the side entry bore and a circular part (74) being for connection with the seal bore male part (53).

    [0043] The circular part (74) is equipped with a circumferential void (73). The seal bore bonnet (40) and the seal bore male part (53) are provided with mutually adapted connecting means, and when connected as seen in e.g figure 2, fluid communication between the internal channel in the stinger (52) and the external of the housing is achieved by holes/opening/ports (57) leading from inside the stinger (50) to an intermediate channel (58) which is extends to a circumferential void (73) formed in the seal bore bonnet. From the void, the fluid connection further extends to the external surface of the housing by channel (41) running inside the seal bore bonnet (40).

    [0044] The functionality of an embodiment of an assembly according to the invention will now be described with reference to figures 5-8.

    [0045] In figure 7 is shown a housing (1) which previously served as a housing for a lower master valve.

    [0046] In order to use the housing for the establishment of coiled tubing gas lift, the well is plugged off and the valve bonnet is removed.

    [0047] Furthermore valve gates and valve seats are taken out and the flow port seats (71, 72) are (shown in greater details in figure 8) installed in the recesses (9a) which were already formed in the housing (for the purpose of supporting the valve seats). The two flow port seats are provided with through-going holes (79) leading from the central flow passage (3) to the cavities (2,4) which earlier served the purpose of housing the gate in its open and closed positions. After the installation of the flow port seats (71, 72), the sealbore bonnet (seen in details in figure 5) is installed between the seats. The sealbore bonnet (40) may be secured to the housing (1) by bolts fastened in the same holes as earlier used to fasten the valve bonnet. However, other fastening means may be used.

    [0048] When installed the seal bore bonnet (40) is sealing off the side entry port (2) from the exterior of the housing (1).

    [0049] After installation of the seal bore seats (71,72) and the seal bore bonnet (40), a coiled tubing gas lift string is attached to the coiled tubing hanger assembly (12, 13, 14 + 30) at the coiled tubing connector (31), and the string is deployed into the well with a running tool attached to the coiled tubing hanger (12, 13, 14 + 30) in a profile (13c) (shown in figure 3) situated at the top sub (13) (this step is not shown in the illustrations). If the invention is to be used in a well having more than two master valves, the string is deployed into the well through the master valves (normally being situated coaxially above each other).

    [0050] When the coiled tubing hanger assembly is engaging the tubing hanger lock profile (20), all the weight of the coiled tubing string is set down in the lock profile (20) via a so-called no-go shoulder on the coiled tubing hanger assembly's upper lock mandrel (12). In order to lock the tubing hanger in place, the top sub (13) is then pushed down into the coiled tubing hanger lock assembly (12, 13, 14 + 30) and the dogs (11) are engaged into the tubing hangers locking profile (20). The running tool is then released from the coiled tubing hanger and pulled out of the well.

    [0051] The stinger (50) is then connected to the seal bore male part (53) and both are then deployed in the well by holding the stinger assembly locking mechanism (95) and moved down into the well until the lower part of the stinger assembly (50) engages the receptacle in the cross-over tool (30) of the coiled tubing hanger (12, 13, 14 + 30).

    [0052] The seal bore male part (53) is then connected to the bonnet seal bore (40) via a locking profile (not shown) in the upper seat (71).
    The running tool is then sheared off the stinger and retrieved form the well.

    [0053] As shown by arrows (A and B) in figure 2 two separate flow paths are now established, one of them extending from the annulus surrounding the coiled tubing to the upper part (3b) of the central flow passage and the other extending from the exterior of the housing to the interior of the coiled tubing suspended in the well.

    [0054] In the shown embodiment the fluid tight connection between the internal channel (51) and the external of the housing is achieved by holes/opening (57) leading from inside the stinger (50) to an intermediate channel (58) which is extending to a circumferential void (73) from where the fluid connection is further extended to the external surface of the housing by channel (41) running inside the seal bore bonnet (73).

    [0055] Figure 10 shows a modified x-mas tree being equipped with an embodiment of the invention. The modified x-mas tree, in the shown embodiment, is furthermore equipped with a new master valve (2a) located on top of the valve that previously (before the modification) functioned as an upper master valve.


    Claims

    1. An assembly suitable for use in a Christmas tree used with coiled tubing and other wellhead components, said assembly comprising:

    • a housing (1) having an exterior surface, a first end having an inlet channel and a second end having an outlet channel, said inlet and outlet channels being connected by a central flow passage (3) for providing of fluid communication between a well and said Christmas tree, said first end being connectable to a well being positioned below a connector, said housing further comprising a side-entry bore (2) for providing fluid communication between said central flow passage and the external of said housing;
    Characterized in that

    • a hanger tool (30, 12, 13 14), being positioning in a well tubular below said side entry bore and supporting a coiled tubing, said hanger tool being provided with two separate fluid passages, a first fluid passage (31) communicating with said coiled tubing and a second fluid passage (32) communicating with the annulus between said coiled tubing and said well tubular;

    • an upper assembly (53,95,40, 71,72) to be inserted through the side entry bore;

    • a tubular stinger tool (50) having an upper section and a lower section, the lower section having a portion adapted (60) to be inserted into the hanger tool (30) and the upper section having a portion being adapted for connection with said upper assembly (53) to be inserted through said housing.

    • the hanger tool and the stinger tool being mutually adapted such that said first fluid passage is being extended through the stinger (B) to the upper section of said tubular stinger and said second fluid passage is being extended by the annulus (A) created between said tubular stinger tool and said hanger tool, the upper assembly and the upper section of the tubular stinger being mutually adapted such that said first fluid passage is being further extended to the external of said housing and said second fluid passage is being further extended to the second end of the housing.


     
    2. An assembly according to claim 1 wherein said assembly further comprises a housing for a lower master valve.
     
    3. An assembly according to claim 1 or 2 wherein said assembly further comprises a housing for an upper master valve.
     
    4. An assembly according to claims 2 or 3 wherein said lower master valve comprises a housing having an inlet channel and an outlet channel, a gate (6) having two faces and a port therein opening into the faces, said gate being reciprocable between an open position and a dosed position, said port communicating with said channels when the gate is in the open position.
     
    5. An assembly according to claim 3 or 4 wherein said upper master valve comprises a housing having an inlet channel and an outlet channel, a gate having two faces and a port therein opening into the faces, said gate reciprocable between an open position and a closed position, said port being communicating with said channels when the gate is in the open position.
     
    6. An assembly according to claims 2-5 wherein said housing and the housing for the lower master valve are essentially identical.
     
    7. An assembly according to claims 3-6 wherein said housing and the housing for the upper master valve are essentially identical.
     
    8. An assembly according to claims 3-7 wherein said central flow passages and said inlet channels and said outlet channels in the upper master valve and the lower master valve are adapted to be in alignment with the bore of the wellhead.
     
    9. An assembly according to claim 8 wherein said hanger tool is adapted to said flow channels and said central flow passages such that the hanger tool can be inserted into the well tubular through said channels and flow passages.
     
    10. An assembly according to claim 8 wherein said stinger tool is adapted to said flow channels and said central flow passages such that the stinger tool can be inserted into the well tubular through said channels and said flow passages.
     


    Ansprüche

    1. Vorrichtung, die zur Verwendung in einem Produktionskreuz geeignet ist, das mit einer Rohrwendel und anderen Bohrlochkopfkomponenten verwendet wird, welche Vorrichtung Folgendes umfasst:

    • ein Gehäuse (1) mit einer Außenfläche, einem ersten Ende mit einem Einlasskanal und einem zweiten Ende mit einem Auslasskanal, wobei der Einlasskanal und der Auslasskanal durch eine zentrale Strömungspassage (3) zur Bereitstellung von Fluidkommunikation zwischen einem Bohrloch und dem Produktionskreuz verbunden sind, wobei das erste Ende mit einem Bohrloch, das unterhalb eines Konnektors positioniert ist, verbunden werden kann, wobei das Gehäuse weiter eine Bohrung (2) mit seitlichem Zugang zur Bereitstellung von Fluidkommunikation zwischen der zentralen Strömungspassage und der Außenseite des Gehäuses umfasst;

    dadurch gekennzeichnet, dass

    • ein Hängewerkzeug (30,12,13 14), das in einem Bohrlochrohr unterhalb der Bohrung mit seitlichem Zugang positioniert ist und eine Rohrwendel unterstützt, wobei das Hängewerkzeug mit zwei getrennten Fluidpassagen versehen ist, eine erste Fluidpassage (31), die mit der Rohrwendel kommuniziert, und eine zweite Fluidpassage (32), die mit dem Ringraum zwischen der Rohrwendel und dem Bohrlochrohr kommuniziert;

    • eine obere durch die Bohrung mit seitlichem Zugang einzuführende Vorrichtung (53,95,40, 71,72);

    • ein rohrförmiges Einstechwerkzeug (50) mit einem oberen Abschnitt und einem unteren Abschnitt, wobei der untere Abschnitt einen Teil (60) aufweist, der dafür eingerichtet ist, in das Hängewerkzeug (30) eingeführt zu werden, und der obere Abschnitt einen Teil aufweist, der zum Verbinden mit der oberen Vorrichtung (53) eingerichtet ist zum Einführen durch das Gehäuse,

    • wobei das Hängewerkzeug und das Einstechwerkzeug so gegenseitig angepasst sind, dass die erste Fluidpassage durch den Einstecher (B) zum oberen Abschnitt des rohrförmigen Einstechers verlängert ist, und die zweite Fluidpassage durch den zwischen dem rohrförmigen Einstechwerkzeug und dem Hängewerkzeug erzeugten Ringraum (A) verlängert ist, wobei die obere Vorrichtung und der obere Abschnitt des rohrförmigen Einstechers so gegenseitig angepasst sind, dass die erste Fluidpassage zur Außenseite des Gehäuses weiter verlängert ist, und die zweite Fluidpassage zum zweiten Ende des Gehäuses weiter verlängert ist.


     
    2. Vorrichtung nach Anspruch 1, wobei die Vorrichtung weiter ein Gehäuse für ein unteres Masterventil umfasst.
     
    3. Vorrichtung nach Anspruch 1 oder 2, wobei die Vorrichtung weiter ein Gehäuse für ein oberes Masterventil umfasst.
     
    4. Vorrichtung nach Anspruch 2 oder 3, wobei das untere Masterventil ein Gehäuse mit einem Einlasskanal und einem Auslasskanal, ein Tor (6) mit zwei Flächen und einer Öffnung darin, die zu den Flächen öffnet, umfasst, wobei das Tor zwischen einer offenen Position und einer geschlossenen Position gewechselt werden kann, wobei die Öffnung mit den Kanälen kommuniziert, wenn das Tor in der offenen Position ist.
     
    5. Vorrichtung nach Anspruch 3 oder 4, wobei das obere Masterventil ein Gehäuse mit einem Einlasskanal und einem Auslasskanal, ein Tor mit zwei Flächen und einer Öffnung darin, die zu den Flächen öffnet, umfasst, wobei das Tor zwischen einer offenen Position und einer geschlossenen Position gewechselt werden kann, wobei die Öffnung mit den Kanälen kommuniziert, wenn das Tor in der offenen Position ist.
     
    6. Vorrichtung nach Anspruch 2-5, wobei das Gehäuse und das Gehäuse für das untere Masterventil im Wesentlichen identisch sind.
     
    7. Vorrichtung nach Anspruch 3-6, wobei das Gehäuse und das Gehäuse für das obere Masterventil im Wesentlichen identisch sind.
     
    8. Vorrichtung nach Anspruch 3-7, wobei die zentralen Strömungspassagen und der Einlasskanal und der Auslasskanal im oberen Masterventil und unteren Masterventil dafür angepasst sind, mit der Bohrung des Bohrlochkopfs zu fluchten.
     
    9. Vorrichtung nach Anspruch 8, wobei das Hängewerkzeug an die Strömungskanäle und die zentralen Strömungspassagen angepasst ist, so dass das Hängewerkzeug in das Bohrlochrohr durch die Kanäle und Strömungspassagen eingeführt werden kann.
     
    10. Vorrichtung nach Anspruch 8, wobei das Einstechwerkzeug an die Strömungskanäle und die zentralen Strömungspassagen angepasst ist, so dass das Einstechwerkzeug in das Bohrlochrohr durch die Kanäle und Strömungspassagen eingeführt werden kann.
     


    Revendications

    1. Dispositif apte à être utilisé dans un arbre de Noël utilisé avec un tube enroulé et d'autres composants de tête de puits, ledit dispositif comprenant :

    • un boîtier (1) ayant une surface extérieure, une première extrémité ayant un canal d'entrée et une deuxième extrémité ayant un canal de sortie, lesdits canaux d'entrée et de sortie étant connectés par un passage d'écoulement central (3) pour fournir une communication fluidique entre un puits et ledit arbre de Noël, ladite première extrémité pouvant être connectée à un puits positionné au-dessous d'un connecteur, ledit boîtier comprenant en outre un alésage d'entrée latérale (2) pour fournir une communication fluidique entre ledit passage d'écoulement central et l'extérieur dudit boîtier ;

    caractérisé en ce que

    • un outil de suspension (30,12, 13, 14), étant positionné dans un puits tubulaire au-dessous dudit alésage d'entrée latéral et supportant un tube enroulé, ledit outil de suspension étant pourvu de deux passages de fluide séparés, un premier passage de fluide (31) communiquant avec ledit tube enroulé et un deuxième passage de fluide (32) communiquant avec l'espace annulaire entre ledit tube enroulé et ledit puits tubulaire ;

    • un ensemble supérieur (53, 95, 40, 71,72) à insérer à travers l'alésage d'entrée latéral ;

    • un outil de pointe tubulaire (50) ayant une section supérieure et une section inférieure, la section inférieure ayant une partie adaptée (60) pour être insérée dans l'outil de suspension (30) et la section supérieure ayant une partie adaptée pour être connectée avec ledit ensemble supérieur (53) pour être insérée à travers ledit boîtier,

    • l'outil de suspension et l'outil de pointe étant mutuellement adaptés si bien que ledit premier passage de fluide s'étend à travers la pointe (B) jusqu'à la partie supérieure de ladite pointe tubulaire et ledit deuxième passage de fluide est prolongé par l'espace annulaire (A) créé entre ledit outil de pointe tubulaire et ledit outil de suspension, ledit l'ensemble supérieur et la section supérieure de la pointe tubulaire étant mutuellement adaptés si bien que ledit premier passage de fluide est en outre prolongé vers l'extérieur dudit boîtier et ledit deuxième passage de fluide est en outre prolongé jusqu'à la deuxième extrémité du boîtier.


     
    2. Dispositif selon la revendication 1, dans lequel ledit dispositif comprend en outre un boîtier pour une soupape maître inférieure.
     
    3. Dispositif selon la revendication 1 ou 2, dans lequel ledit dispositif comprend en outre un boîtier pour une soupape maître supérieure.
     
    4. Dispositif selon la revendication 2 ou 3, dans lequel ladite soupape maîtresse inférieure comprend un boîtier ayant un canal d'entrée et un canal de sortie, une grille (6) ayant deux faces et un port qui débouche dans les faces, ladite grille pouvant être déplacée entre une position ouverte et une position ouverte, ledit port communiquant avec lesdits canaux lorsque la grille est en position ouverte.
     
    5. Dispositif selon la revendication 3 ou 4, dans lequel ladite soupape maîtresse supérieure comprend un boîtier ayant un canal d'entrée et un canal de sortie, une grille ayant deux faces et un port qui débouche dans les faces, ladite grille pouvant être déplacée entre une position ouverte et une fermeture, ledit port communiquant avec lesdits canaux lorsque la grille est en position ouverte.
     
    6. Dispositif selon les revendications 2 à 5, dans lequel ledit boîtier et le boîtier pour la soupape maître inférieure sont essentiellement identiques.
     
    7. Dispositif selon les revendications 3 à 6, dans lequel ledit boîtier et le boîtier pour la soupape maître supérieure sont essentiellement identiques.
     
    8. Dispositif selon les revendications 3 à 7, dans lequel lesdits passages d'écoulement centraux et lesdits canaux d'entrée et lesdits canaux de sortie dans la soupape maîtresse supérieure et la soupape maître inférieure sont adaptés pour être alignés avec l'alésage de la tête de puits.
     
    9. Dispositif selon la revendication 8, dans lequel ledit outil de suspension est adapté auxdits canaux d'écoulement et auxdits passages d'écoulement centraux si bien que l'outil de suspension peut être inséré dans le puits tubulaire à travers lesdits canaux et passages d'écoulement.
     
    10. Dispositif selon la revendication 8, dans lequel ledit outil de pointe est adapté auxdits canaux d'écoulement et auxdits passages d'écoulement centraux si bien que l'outil de pointe peut être inséré dans le puits tubulaire à travers lesdits canaux et lesdits passages d'écoulement.
     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



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    Patent documents cited in the description