EP0242239B1 - Werkzeug zum Abdichten eines Steigrohres - Google Patents

Werkzeug zum Abdichten eines Steigrohres Download PDF

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Publication number
EP0242239B1
EP0242239B1 EP87400275A EP87400275A EP0242239B1 EP 0242239 B1 EP0242239 B1 EP 0242239B1 EP 87400275 A EP87400275 A EP 87400275A EP 87400275 A EP87400275 A EP 87400275A EP 0242239 B1 EP0242239 B1 EP 0242239B1
Authority
EP
European Patent Office
Prior art keywords
tool
valve member
valve
axis
orifice
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP87400275A
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English (en)
French (fr)
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EP0242239A1 (de
Inventor
Peter John Airey
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Flopetrol Services Inc
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Flopetrol Services Inc
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Publication date
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Publication of EP0242239A1 publication Critical patent/EP0242239A1/de
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Publication of EP0242239B1 publication Critical patent/EP0242239B1/de
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
    • E21B23/004—Indexing systems for guiding relative movement between telescoping parts of downhole tools
    • E21B23/006—"J-slot" systems, i.e. lug and slot indexing mechanisms
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
    • E21B23/02—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells for locking the tools or the like in landing nipples or in recesses between adjacent sections of tubing
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/06—Measuring temperature or pressure

Definitions

  • the present invention relates to a tool for closing the production column of a well containing a pressurized fluid, such as petroleum, designed to be lowered at the end of a suspension cable and to be temporarily fixed in a coaxial situation.
  • a sleeve which belongs to a fitting incorporated in the production column, this fitting offering an enlarged diameter relative to that of said column, so as to allow the fluid to easily bypass the tool during periods when the production column is not blocked.
  • one of the main tests for determining the production capacity of a hydrocarbon well consists in stopping production using a valve and recording the pressure variations resulting from the closing of the well.
  • the subject of the invention is a sealing tool of simple structure, which can be installed in the production column of a well for the duration of the tests carried out on the well, and then be removed without difficulty.
  • the tool according to the invention comprises the elements described in claim 1.
  • a shuttering tool having these provisions can be easily installed in a production column to which has been incorporated a fitting comprising a conjugate seat of the valve that the tool comprises.
  • the tool is lowered at the end of its suspension cable, the valve extending longitudinally in its first orientation. When it reaches its seat, the valve can therefore pass through it, then, after having been placed transversely in its second orientation, operate normally in cooperation with said seat to close and open the orifice thereof, consequently, shut off or not the production column.
  • the tool comprises a first part of generally cylindrical shape, offering an outside diameter smaller than that of the aforementioned sleeve and which can be locked coaxially in the latter, and a second part which can slide coaxially in the first part. and comprising a rod which emerges therefrom and at the end of which the valve is mounted with the possibility of tilting about an axis of articulation perpendicular to the longitudinal axis of the rod, that is to say of the tool, and parallel to the minor axis of the valve contour.
  • a third part in the form of a socket and a connecting rod located in a plane passing through the general axis of the tool and perpendicular to the axis of articulation of the valve, is articulated to the latter and to the third part in the region of its end by which it emerges from the first part, so that when the second part slides out of the first part, first of all supported on a shoulder of the second part, accompanies the latter, the rod placing the valve transversely in its second orientation, then is stopped by stop means while the second part alone continues to move, the link then causing the valve to tilt in its first orientation.
  • the second part is coupled in rotation, around the axis of the tool, to the first part and guide means are provided on the latter and on the sleeve of the fitting which, when the tool, descending into the production column, reaches the fitting, first forces the first part to pivot around the axis of the tool to orient itself so as to bring the axis d articulation of the valve to be parallel to the major axis of the seat orifice, then maintain the first part in this orientation, while the tool still descends by a certain height greater than the length of the valve, and finally rotate the first part of 90 ° around the axis of the tool so as to bring the axis of articulation of the valve to be perpendicular to the major axis of the orifice of the seat.
  • the guide means with which the first part and the sleeve are provided comprise a pair of guide tracks, which can be hollowed out in the internal surface of the sleeve, and a pair of pins which can be mounted on the first part, diametrically opposite points; these pins come to engage in said tracks when the tool is lowered into the sleeve, each track successively comprising a first flared area, capable of receiving one of said pins regardless of the orientation of the tool upon its arrival in the sleeve, a second narrow and rectilinear zone, extending parallel to the axis of the tool, and a third zone which is similarly narrow, but follows a path turning 90 ° around said axis.
  • the second zone ensures the passage of the valve through the seat and the third the correct positioning of the valve facing said seat.
  • the second part is coupled to a fourth part which can slide longitudinally inside the first part and from which it emerges, opposite the second part, by an end to which the suspension cable attaches, directly or indirectly ; thus, when a tensile force is applied to said cable, the fourth part moves, against the force of a return spring, by bringing the second part into the first, so that the valve comes s 'apply in the closed position on its seat.
  • the tool In order to allow an easy opening of the production column, when it is desired to stop its closure, despite the high pressure of the well fluid which tends to keep the valve energetically applied against its seat, the tool should have a track temporary communication of the interior spaces to the production column which are located on either side of the valve, prior to each coming of the latter in the open position. This arrangement ensures an equalization of the pressures prevailing on each side of the valve and consequently eliminates the pressure force which would otherwise prevent the valve from leaving its seat.
  • This communication channel is preferably formed at least of a first orifice drilled radially in the wall of the first part, of a second orifice drilled radially in the wall of the second part, opposite the first orifice when the valve is in the closed position on its seat, this second orifice opening into an axial channel drilled in the second part, which itself opens through the valve, when it is in the closed position, through a third orifice drilled in the center of this, and a fourth orifice drilled radially in the wall of the fourth part, which is coupled to the second with a certain longitudinal play, the position of this fourth orifice on the fourth part being such that it comes into alignment first and second orifices during (preferably at the end) of the empty movement, corresponding to said clearance, which the fourth part performs when, the valve being closed, it e moves to the second part in order to control the opening thereof.
  • first, second and fourth orifices can be provided, distributed around the general axis.
  • the axial channel of the second part extends to the end of the tool opposite the valve by an axial channel drilled in the fourth part, these two channels communicating with each other by a sliding junction waterproof.
  • a channel crossing the tool over its entire length which allows to transmit, when the column is closed, the pressure prevailing in the well to a measuring device interposed between the tool and its suspension cable.
  • the first part should be provided with at least one locking member subjected to the action of at least one spring which tends to make it emerge radially at through the wall of said part to come to engage in a peripheral cavity formed on the internal surface of the coupling sleeve.
  • the member or each locking member comprises a bolt intended to engage in a peripheral groove that includes said cavity, the combined sides of the bolt and of the groove which are turned towards the attachment side of the suspension cable being machined in slight undercut, so as to block in a certain way the tool vis-à-vis any tensile force applied to its suspension cable.
  • FIG. 1 shows a well dug in an oil-producing zone 90 and comprising, in a casing 71, a production column 100. Between the lower end of the latter and the casing 71 is placed an annular sealing device or "packer" 63.
  • a sealing tool 70 according to the invention is lowered into a specially fitted fitting 101, incorporated into the production column 100 slightly above the level of the producing area 90, using a cable 76 to which it is suspended.
  • This cable passing inside the production column 100, emerges at its top through a sealing device 72 to be wound, via deflection pulleys 73, 74, on the drum of a winch 75 arranged on the surface of the ground.
  • Cable 76 is a cable electric which, in addition to a mechanical suspension and actuation function of the tool 70, provides a function of transmitting measurement signals to the surface from devices which can be associated with the tool, such as a pressure gauge 81 designed to measure the pressure at the bottom of the well, below the tool.
  • the tool 70 shown in FIGS. 2A, 2B and 2C which extends along a longitudinal axis Z, essentially comprises a long tubular part 1, which constitutes its outer casing, a second part 2, which can slide longitudinally in the part 1 and emerges at one of the ends of the latter, a third part 3, in the form of a socket, which can slide between said end of the part 1 and the part 2, a fourth part 4, which is arranged in the extension of the part 2 and can slide inside part 1, from where it emerges at the other end thereof, and a part 5 in the form of a socket, relatively short, which is interposed between parts 1 and 4 .
  • the part 4 is formed of different elements screwed one after the other.
  • the upper element 4a comprises a threaded cavity 4a 'allowing the connection by screwing of a pressure gauge 81, to which the pressure prevailing in the well below the tool 70 is transmitted by a channel 20, 40 extending axially to through the tool, over its entire length, and opening into the cavity 4a '.
  • the part 4 can slide longitudinally in the part 1, which is arranged to be able to engage with low clearance and lock in a sleeve 102, of internal diameter close to that of the column 100, fixed coaxially inside the connector 101 , by means of radial fins 103, 104 welded on the one hand to the internal wall of the connector 101 and on the other hand to the ends of the external surface of the sleeve 102.
  • An annular gap 106 is formed between the latter and the wall of the connection 101, of diameter greater than that of the production column 100, so as to provide a wide bypass passage of the tool 70 to the flow of fluid rising in the production column outside of the shutter periods thereof .
  • each locking member 10 comprises two bolts 10a, b, arranged one above the other, and said imprint is composed of two peripheral grooves 102a, b, each offering a profile conjugated with that of the bolts which match him.
  • This profile includes oblique flanks 29 in clearance which allow the bolts to escape from the grooves during movement of the part 1 in the sleeve 102, with the exception of the upper flank 29 'of the lower groove 102b, machined against skin, like the corresponding side of the lower bolts 10b, so as to prohibit any upward movement of said bolts once engaged in said groove, therefore any rise of the part 1 in the sleeve 102 when the latter is subjected to a force of pull up.
  • the piece 1 cannot descend further into the sleeve 102, because it is stopped by a peripheral bead 1 a 'which it has at its top and which comes to rest on the top of the sleeve 102, comprising an internal bead 102c, when the bolts 10a, b arrive opposite the grooves 102a, b when the tool 70 is placed in the connector 101.
  • a peripheral bead 1 a ' which it has at its top and which comes to rest on the top of the sleeve 102, comprising an internal bead 102c, when the bolts 10a, b arrive opposite the grooves 102a, b when the tool 70 is placed in the connector 101.
  • the locking of the tool 70 provided by the members 10 is not however not final.
  • the part 4 comprises, below its upper element 4a, a long tube 4b of small diameter, which can slide in a cylindrical passage 85 which is axially hollowed out in an element forming the upper part of the part 1, and just ends below the locking members 10.
  • a tubular part 4c of larger diameter which has in its lower part a longitudinal groove 41 in which is engaged a lug 14 belonging to the part 1.
  • the part 1 is continued by a tubular element 1b with a thin wall, of the same outside diameter as the element 1a. It is through the wall of the upper region of this element that the members 10 emerge through the windows 12a to ensure the locking of the tool in the sleeve 102.
  • An element 1c also of thin-walled tubular structure, of the same outside diameter, is connected to the element 1b of the part 1.
  • a cylindrical annular gap is formed, the upper part of which, inside element 1b, is occupied by the sleeve 5 which can be move longitudinally, and the lower part of which, inside the element 1 c, houses a compression spring 19 which bears on the one hand against the lower end 1 b of the element 1 b forming a stop flange at the 'interior of element 1c, and on the other hand against a support rim 4d' offered by the top of an element 4d connecting to element 4c and having a diameter enlarged to the value of the internal diameter of l element 1 c.
  • the upper part 2a of the part 2 can slide, which extends downwards by a tubular element 2b with a thin wall, of smaller diameter, which emerges downwards from a terminal element the of the part 1.
  • the lower end of the part 2 constituted by an element 2c fixed to the element 2b, carries a valve 60 capable of cooperating with a seat 69 secured of the fitting 101.
  • the sleeve 3 which can slide with greasy friction relative to one and the other of the said elements 2b, the.
  • the sleeve 3 is biased downwards in abutment against the end element 2c of the part 2, which has a diameter slightly greater than that of the element 2b, by a compression spring 49 mounted around the upper part of the latter element, between element 2a and a collar 3a provided at the upper end of the sleeve 3.
  • the channel 20, 40 passing right through the tool 70 extends along the axis of the parts 2 and 4.
  • the channel 20 ends in an orifice 61 drilled through the valve 60, in its center, this orifice being in alignment with the channel 20 when said valve is in the closed position.
  • the valve 60 is mounted at the lower end of the part 2 so as to be able to pivot around a transverse axis 64, its mean plane thus being able to take an orientation either transverse (shown in solid line in FIG. 2C), or longitudinal (shown in phantom in this same figure).
  • the valve 60 and the orifice 69a have an oblong outline, as shown in FIG.
  • valve 60 is pivoted 90 ° around the axis 64 to orient its plane in the longitudinal direction, and around the longitudinal axis, coincident with the general axis Z, of the part 2 which supports it to cause the said plane to be parallel to the direction D of the major axis of the orifice 69a of the seat 69, it is possible, as shown in FIG. 5, to pass the valve 60, the thickness of which is less than the width of the orifice of said seat, through that -cien imposing a longitudinal translational movement on the part 2.
  • This feature allows, as will be seen below, the commissioning of the valve during the installation of the tool 70 in the connector 101, then the removal of the tool without the valve blocking it.
  • the pivoting movements of the part 2 around the axis Z are obtained by rotating the part 1 around this same axis, coupled in rotation with the part 4 (via the pins 14 engaged in the grooves 41), the latter being coupled in rotation with the part 2 via pins 27 belonging to the latter and engaged in longitudinal grooves 42 that the lower element 4d of the part 4 comprises.
  • the rotation of the part 1 is obtained by means of a pair of pins 15 which it is provided with and which, during the introduction of the tool into the sleeve 102, cooperating with a pair of guide tracks 105 hollowed out in the wall of said sleeve (FIG. 6).
  • each pin 15 which is in any position around the axis Z, meets a first part of one of the guide tracks 105 extending over a longitudinal zone 21 and offering a flared shape like a funnel: the edges of each track 105 start, at the top of the sleeve 102, from two point P, Q diametrically opposite with respect to the axis Z , then go closer until they are no longer separated, at the bottom of the zone Z, than the width of the pins 15 which they have to guide; the two tracks 105 are then diametrically opposite in a direction D1 such that, when the pins 15 reach this place, the axis of articulation 64 of the valve 60 is parallel to the direction D of the major axis of the orifice of the seat 69 of the valve.
  • zone Z2 the two guide tracks continue while maintaining the same reduced width, parallel to the axis Z, over a length at least equal to the length of the valve 60.
  • This zone Z2 is followed by a zone Z3 where the guide tracks, always of reduced width, continue by bending 90 ° around the axis Z, so that at the bottom of this zone Z3 they are diametrically opposite in a direction D2 perpendicular to the initial direction D1; when the pins 15 are aligned in this direction D2, the axis of articulation 64 of the valve is parallel to the minor axis of the orifice of the seat thereof.
  • the pins 15 can cross the bead 102c which comprises at its top the sleeve 102, they are carried by elastic blades 16 behind which the body of the part 1 is hollowed out.
  • the pins 15 disappear when said bead 102c passes, then resume their natural projecting position, to engage in the guide tracks 105 of the sleeve 102.
  • the tilting movements of the valve 60 around its axis of articulation 64 are obtained by means of a link 65 arranged in a radial plane and articulated on the one hand to the valve 60 and on the other hand to the lower end of the part 3.
  • the link 65 directs the valve 60 so that its mean plane M is perpendicular to the axis Z.
  • the link 65 forces the valve 60 to pivot about the axis 64, until its plane in M 'is parallel to the axis Z.
  • FIGS. 9B to 9D These different movements are illustrated in FIGS. 9B to 9D.
  • the part 2 lowers (under the action of the spring 19 and by means of the part 4), the part 3 first descends with it, being held by the spring 49 in abutment against the shoulder 2c 'offered by the end element 2c of the part 2, the valve 60 also descending in a translational movement from its closed position. Then the part 3 is stopped by its upper rim 3a abutting against the bottom the 'of the part 1 in which it slides ( Figure 9C).
  • the part 2 continuing to descend (by compressing the spring 49, weaker than the spring 19), the valve 60 rocks around its articulation axis 64 (FIG. 9D) under the action of the rod 65, the point of articulation of the latter to the part 3 then being immobilized, until it takes its position of longitudinal orientation where its mean plane is parallel to the general axis Z of the tool.
  • the tool is lowered into the produc column tion 100, suspended from the aforementioned cable 76 by means of the aforementioned pressure sensor 81.
  • the valve is then, under the action of the relaxation of the spring 19 in the absence of tensile force applied to the cable 76, tilted longitudinally, its plane being parallel to the axis Z.
  • the tool penetrates, with an orientation arbitrary around this axis, in the sleeve 102 of the connector 101.
  • the pins 15 of the part 1 engage in the flared entry zone Z1 of the guide tracks 105 which the sleeve 102 comprises, and force the part 1 to pivot around the Z axis so that it causes, via the parts 4 and 2, the valve 60 to be parallel to the major axis of the oblong orifice 69a of its seat 69.
  • the tool continuing to descend under the action of the force of gravity, the pins 15 travel through the zone Z2 where they keep their orientation, so that the valve 60 passes, in a pure translational movement, through its seat 69 (FIG. 8B).
  • the pins 15 describe the zone Z3, rotating the part 1 by 90 ° around the axis Z so as to bring the axis of articulation 64 of the valve 60 to be perpendicular to the major axis of the orifice 69a of its seat 69 ( Figure 8C).
  • the part 1 being shaped so that 1 has a longitudinal distance between its pins 15 and its locking members 10 corresponds to the distance between the bottom of the guide tracks 105 (end of the zone Z3) and the grooves 102a, 102b of the sleeve 102 , when the pins have completed their course of zone Z3, the bolts 10a, b of the members 10 are located opposite said grooves 102a, b and engage therein, locking the part 1 in the sleeve 102. The positioning of the tool 70 in the connector 101 is then completed.
  • valve 60 is strongly pressed against its seat 69 by the very high pressure which prevails in the well, and the corresponding force is opposed to the opening of the valve if one wishes to put regions I and II back into communication.
  • This part comprises, in its lower part forming a cylindrical skirt around the part 2 (and constituted by its element 4d - FIG. 2B), orifices 4d 'drilled radially. After this downward movement of the part 4, when it comes into contact with the part 2 via the lugs 27 thereof, its orifices 4d 'are in alignment (FIG.
  • the part 4 continues to descend with the part 2 by taking off and separating from its seat 69 the valve 60 (FIG. 9C).
  • the two regions 1 and II of the production column are then placed in complete communication.
  • the valve 60 is opened and closed alternately.
  • the number of opening-closing cycles is limited by the sleeve 5, which serves as an indexing member .
  • the latter which can slide between the element 1b of the part 1 and the element 4c of the part 4, has at its lower end an external thread 51 (FIGS. 2b and 3), engaged with a thread 17 conjugate that has said element 1b on its internal surface.
  • the part 5 further comprises, in the vicinity of its thread 51, lugs 52 which are engaged in a guide path 13 composed of a set of grooves dug in the periphery of the element 4c of the part 4 (FIG. 7) .
  • a branch m parallel to the axis Z of the tool and by a branch n oblique to this axis.
  • Said grooves follow one another head-to-tail on the periphery of element 4c, their branches m being alternately oriented upwards and downwards, while their branches n are all oriented in the same direction around the axis Z of the part 2. All the grooves connect to each other, the end of the oblique branch n of each groove opening into the branch m of the next.
  • the sleeve 5 has a peripheral chamfer 53 by means of which, when it moves upwards, its end edge can be introduced in the manner of a wedge between the element 1b of the part 1 and the 'lower end of the locking members 10, provided with a corresponding chamfer 10c, these members then being forced to approach the axis Z, that is to say to retract in the unlocking position inside the element 1 b.
  • each lug 52 of the socket 5 is located at 52-1 at the top of the branch m of one (3a) of the grooves 13a, c, ... of which the branches m face upwards (figure 7).
  • the part 4 rises and the lug under consideration meets in 52-2 the branch n of said groove 13a, where it is forced to engage; having traversed it, it enters in 52-3 in the branch m of the following groove 13b, the end of which it reaches to stabilize in 52-4 when the upward movement of the part 4 ends, the valve 60 having reached its closed position.
  • the cable 76 is released, which causes the descent of the part 4.
  • the lug 52 again travels, in the opposite direction, the branch m of the groove 13b, then is pointed towards its branch n that it attacks in 52-5, and finally reaches in 52-6 the branch m of the groove 13c, at the end of which, when the part 4 has reached its low level, it stabilizes in 52-7, point which has an angular offset x from the starting point 52-1.
  • the part 5 rotates, around the axis Z, by a fraction of a turn x relative to the part 4, which is driven in translational movements, but not in rotation in the stationary part 1, thanks to the lug 14 of the latter part engaged in the rectilinear groove 41 of the part 4.
  • the part 5, coupled to the part 1 by the conjugate threads 51, 17, does not rise to not during its successive rotations of angle x.
  • its chamfered upper end 53 engages between the part 1 and the lower end of the locking members 10, so that their bolts 10b are extracted from the groove 102b of the sleeve 102 where they were engaged and that, as a result, the part 1 is unlocked.
  • the tool 70 is then released and can be raised to the surface.
  • the pins 15 of the part 1 traversing the tracks 105 of the sleeve 102 in opposite directions, rotate the valve 60, baculated by the spring 19, by 90 ° around the axis Z (zone Z3). longitudinal position parallel to the Z axis, then keep it in this orientation (zone Z2) to allow it to cross its seat without hampering the upward movement of the tool.
  • the tool includes a number of O-rings: a seal 67 between a terminal ball, centered on the axis 64, which is provided with the lower element. 2c of the part 2 and a cavity of conjugate circular section hollowed out in the valve 60, a pair of seals 25 between the skirt of the lower element 4d of the part 4 and the upper element 2a of the part 2, located on the side and on the other side of the transverse orifices 2a ', a joint 26 between the top of the part 2 and the tube 4e of the part 4, a pair of seals 44 -between the elements 4d and 4c of the part 4 as well as a joint 91 between elements 4a and 4b and a joint 92 between elements 4b and 4c of this same part 4, a joint 93 between elements 2a and 2b of part 2, and a scraper joint 18 between the top of part 1 and element 4b of part 4.

Claims (13)

1. Werkzeug (70) zum Absperren des Fördersteigrohrs (100) eines ein Fluid unter Druck enthaltenden Bohrlochs, konzipiert, um am Ende eines Aufhängekabels (76) herabgelassen und temporär in koaxialer Lage im Innern einer Hülse (102) befestigt zu werden, die zu einem in das Fördersteigrohr eingebauten Verbindungsstück (101) gehört, welches einen gegenüber dem Steigrohrdurchmesser vergrößerten Durchmesser bietet, welches Werkzeug eine Klappe (60) umfaßt, ausgebildet zum Zusammenwirken mit einem zugeordneten quer im Innern des Verbindungsstücks angeordneten Sitz (69), um die Durchtrittsöffnung (69a) in ihm zu schließen und öffnen, dadurch gekenzeichnet, daß die Öffnung und die Klappe eine längliche Kontur haben, wobei die Klappe außerdem eine Dicke aufweist, die kleiner ist als die Breite der Öffnung, und daß die Klappe orientierbar ist und gemäß einer ersten Orientierung positioniert werden kann, in der sie sich longitudinal erstreckt mit der großen Achse ihrer Kontur im wesentlichen parallel zur Längsachse (Z) des Werkzeugs, was es ihr ermöglicht, die Öffnung zu durchqueren, sowie gemäß einer zweiten Orientierung positioniert werden kann, in der sie sich quer erstreckt und ihr ermöglicht wird, mit dem Sitz (69) zusammenzuwirken, nachdem sie diesen durchquert hat.
2. Werkzeug nach Anspruch 1, dadurch gekennzeichnet, daß es ein erstes Bauteil (1) allgemein zylindrischer Form umfaßt, das einen Außendurchmesser kleiner als jener der Hülse (102) bietet und koaxial in dieser verriegelbar ist, sowie ein zweites koaxial im ersten Bauteil (1) gleitbewegliches Bauteil (2) umfaßt, das eine aus ihm herausragende Stange (2b) aufweist, an deren Ende die Klappe (60) schwenkbeweglich um eine Schwenkachse (64) montiert ist, die sich senkrecht zur Längsachse (Z) der Stange (2b), das heißt des Werkzeugs, und parallel zur kurzen Achse der Kontur der Klappe (60) erstreckt.
3. Werkzeug nach Anspruch 2, dadurch gekennzeichnet, daß zwischen dem ersten und dem zweiten Bauteil (1, 2) koaxial ein drittes Bauteil (3) in Form einer Buchse gleitbeweglich ist und daß ein Lenker (65), angeordnet in einer Ebene, die die Hauptachse (Z) des Werkzeugs enthält und die senkrecht zur Schwenkachse (64) der Klappe (60) verläuft, an der letzteren und an dem dritten Bauteil (3) in dem Bereich seines Endes, mit dem es aus dem ersten Bauteil (1) herauskommt, angelenkt ist, derart daß dann, wenn das zweite Bauteil (2) aus dem ersten Bauteil (1) herausgleitet, das dritte Bauteil (3), zunächst in Anlage an einer Schulter (2c') des zweiten Bauteils (2) gehalten, dieses begleitet, wobei der Lenker (65) die Klappe (60) transversal in ihre zweite Orientierung bringt, dann durch Anschlagmittel (3a, 1e') gestoppt wird, während das zweite Bauteil (2) sich allein weiterverlagert, wodurch der Lenker (65) die Klappe in ihre erste Orientierung verschwenkt.
4. Werkzeug nach Anspruch 3, dadurch gekennzeichnet, daß das dritte Bauteil (3) an der Schulter (2c') des zweiten Bauteils (2) unter der Wirkung einer Feder (49) zur Anlage gelangt.
5. Werkzeug nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß das zweite Bauteil (2) mit dem ersten (1) drehbeweglich um die Achse (Z) des Werkzeugs gekuppelt ist und daß Führungsmittel auf dem letzteren und auf der Hülse (102) des Verbindungsstücks (101) vorgesehen sind, die - wenn das Werkzeug (70) beim Ablassen in das Fördersteigrohr (100) das Verbindungsstück erreicht - das erste Bauteil (1) zwingen, sich zunächst um die Werkzeugachse (Z) zu drehen, um sich derart zu orientieren, daß die Schwenkachse (64) der Klappe (60) parallel zur großen Achse der Öffnung (69a) des Sitzes (69) verläuft, danach das erste Bauteil (1) in dieser Orientierung halten, während das Werkzeug noch um eine bestimmte Höhe größer als die -Länge der Klappe (60) absteigt, und schließlich das erste Bauteil (1) um 90° um die Werkzeugachse (Z) drehen, daß die Schwenkachse (64) der Klappe (60) in eine Lage senkrecht zur großen Achse der Sitz- öffnung (69a) gebracht wird.
6. Werkzeug nach Anspruch 5, dadurch gekennzeichnet, daß die Führungsmittel, mit denen das erste Bauteil und die Hülse versehen sind, ein Paar von Nockenbahnen (105) und ein Paar von Nocken (15) umfassen, die beim Herablassen des Werkzeuges (70) in die Hülse (102) in die Bahnen einlaufen, wobei jede Bahn nacheinander eine erste, sich erweiternde Zone (Z1) zum Erfassen eines Nockens (15) unabhängig von der Orientierung des Werkzeugs (70) bei seinem Eintreffen in der Hülse (102), eine zweite enge und gerade Zone parallel zur Werkzeugachse (Z) sowie eine dritte, ebenfalls enge Zone (Z3) umfassen, die jedoch einer um 90° um die genannte Achse (Z) drehenden Spur folgt.
7. Werkzeug nach Anspruch 6, dadurch gekennzeichnet, daß die Führungsnockenbahnen (105) in die Innenoberfläche der Hülse (102) eingetieft sind und die Nocken (15) auf dem ersten Bauteil (1) an einander diametral gegenüberliegenden Punkten angebracht sind.
8. Werkzeug nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, daß das zweite Bauteil (2) an ein viertes Bauteil (4) angekuppelt ist, das longitudinal im Innern des ersten Bauteils (1) gleitbeweglich ist und aus dem es, gegenüber dem zweiten Bauteil, mit einem Ende herausragt, an dem direkt oder indirekt das Aufhängekabel (76) angebracht ist, derart, daß bei Einwirkenlassen einer Zugkraft (F) auf das Kabel das vierte Bauteil (4) sich gegen die Kraft einer Rückstellfeder (19) verlagert und dabei das zweite Bauteil (2) in das erste rückverlagert, während die Klappe (60) sich in Schließposition an ihren Sitz (69) anlegt.
9. Werkzeug nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß es eine Leitung zum temporären Kommunizierenlassen von Räumen (I, 11) im Innern des Fördersteigrohrs umfaßt, die sich beidseits der Klappe (60) befinden, jedesmal bevor diese in Öffnungsposition gelangt.
10. Werkzeug nach Anspruch 8, dadurch gekennzeichnet, daß es eine Leitung zum temporären Kommunizierenlassen von Räumen (I, II) im Innern des Fördersteigrohrs umfaßt, die sich beidseits der Klappe (60) befinden, jedesmal bevor diese in Öffnungsposition gelangt, welche Leitung gebildet wird von mindestens einer ersten Öffnung (1d'), radial in die Wandung des ersten Bauteils (1) gebohrt, einer zweiten Öffnung (2a'), radial in die Wandung des zweiten Bauteils (2) gebohrt, die der ersten Öffnung (1d') gegenüberliegt, wenn die Klappe (60) in Schließposition auf ihrem Sitz (69) ist, welche zweite Öffnung in einen in das zweite Bauteil (2) gebohrten axialen Kanal (20) mündet, der seinerseits über die Klappe (60) mündet, wenn diese in Schließposition ist, einer dritten Öffnung (61) im Zentrum der Klappe und einer vierten Öffnung (4d'), radial in die Wandung des vierten Bauteils (4) gebohrt, das mit dem zweiten unter einem gewissen Längsspiel gekuppelt ist, wobei die Position dieser vierten Öffnung (4d') in dem vierten Bauteil (4) derart ist, daß sie mit der ersten und der zweiten Öffnung (1d', 2a') während des Leergangs entsprechend dem Spiel in Ausfluchtung gelangt, den das vierte Bauteil (4) ausführt, wenn es sich bei geschlossener Klappe (60) in Richtung zum zweiten Bauteil (2) zum Bewirken der Öffnung der Klappe verlagert.
11. Werkzeug nach Anspruch 10, dadurch gekennzeichnet, daß der axiale Kanal (20) des zweiten Bauteils sich bis zu dem der Klappe (60) abgewandten Ende des Werkzeugs (70) um einen in das vierte Bauteil (4) gebohrten axialen Kanal (40) verlängert, welche beiden Kanäle (20, 40) miteinander über eine abdichtende Gleitverbindung kommunizieren.
12. Werkzeug nach einem der Ansprüche 2 bis 11, dadurch gekennzeichnet, daß das erste Bauteil mit mindestens einem Verriegelungsorgan (10) versehen ist, das unter der Wirkung mindestens einer Feder (11) steht, welche das Organ radial durch die Wandung des Bauteils (1) treten zu lassen sucht, um in eine periphere Ausnehmung einzugreifen, die in die Innenfläche der Hülse (102) des Verbindungsstücks eingearbeitet ist.
13. Werkzeug nach Anspruch 12, dadurch gekennzeichnet, daß das oder jedes Verriegelungsorgan (10) einen Riegel (10b) umfaßt, bestimmt zum Eingreifen in eine periphere Nut (102b), welche die Ausnehmung umfaßt, und daß die zugeordneten Flanken des Riegels und der Nut, zugekehrt der Befestigungsseite des Aufhängekabels (76), mit leichten Gegenhinterschneidungen gearbeitet sind.
EP87400275A 1986-02-10 1987-02-06 Werkzeug zum Abdichten eines Steigrohres Expired - Lifetime EP0242239B1 (de)

Applications Claiming Priority (2)

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FR8601791 1986-02-10
FR8601791A FR2594174B1 (fr) 1986-02-10 1986-02-10 Outil permettant d'obturer la colonne de production d'un puits

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EP0242239A1 EP0242239A1 (de) 1987-10-21
EP0242239B1 true EP0242239B1 (de) 1990-04-18

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US3958633A (en) * 1975-05-29 1976-05-25 Standard Oil Company (Indiana) Flapper-type subsurface safety valve
FR2509366A1 (fr) * 1981-07-08 1983-01-14 Flopetrol Dispositif de commande d'un outil de fermeture de la colonne de production d'un puits
FR2549133B1 (fr) * 1983-07-12 1989-11-03 Flopetrol Procede et dispositif de mesure dans un puits petrolier

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EP0242239A1 (de) 1987-10-21
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FR2594174A1 (fr) 1987-08-14

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