WO1996038651A2 - Procede et moyens pour la remise en securite d'un puits petrolier en cas de defaut de la ligne de commande hydraulique de sa vanne de securite de fond - Google Patents
Procede et moyens pour la remise en securite d'un puits petrolier en cas de defaut de la ligne de commande hydraulique de sa vanne de securite de fond Download PDFInfo
- Publication number
- WO1996038651A2 WO1996038651A2 PCT/FR1996/000733 FR9600733W WO9638651A2 WO 1996038651 A2 WO1996038651 A2 WO 1996038651A2 FR 9600733 W FR9600733 W FR 9600733W WO 9638651 A2 WO9638651 A2 WO 9638651A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- connector
- control line
- section
- sleeve
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000003129 oil well Substances 0.000 title claims abstract description 19
- 230000007547 defect Effects 0.000 title abstract 2
- 238000004519 manufacturing process Methods 0.000 claims abstract description 77
- 238000004873 anchoring Methods 0.000 claims description 43
- 238000009434 installation Methods 0.000 claims description 34
- 239000000725 suspension Substances 0.000 claims description 28
- 239000012530 fluid Substances 0.000 claims description 21
- 241000282472 Canis lupus familiaris Species 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 6
- 238000010008 shearing Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims 2
- 230000035515 penetration Effects 0.000 claims 2
- 238000011017 operating method Methods 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- 230000002950 deficient Effects 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 230000002747 voluntary effect Effects 0.000 description 1
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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
- E21B34/105—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole retrievable, e.g. wire line retrievable, i.e. with an element which can be landed into a landing-nipple provided with a passage for control fluid
Definitions
- the invention relates to a method for restoring an oil well equipped with a bottom safety valve whose hydraulic control line is faulty. It extends to a special bottom safety valve and to various means of implementing the process: new control line, element for raising the wellhead, tools and methods for installing or removing the new command line.
- This hydraulic control line consists of a pressurized fluid conduit which runs outside the production tube (between the latter and the external casing) and is connected, on the one hand, to a surface on a fluid supply, on the other hand, at the valve, to a channel which crosses the receptacle sleeve containing the valve to supply the latter.
- This type of system is now used in practically all wells, especially offshore eruptive wells. It sometimes happens that this hydraulic control line has faults (leak, blocked or broken line): the safety valve can no longer be supplied with pressurized fluid and no longer plays its role; it generally remains closed under the action of its spring and blocks the passage of the effluent.
- Another solution avoiding this extraordinary operation consists in "killing" the well, that is to say reconstituting it entirely by balancing the pressure of the effluent with mud, by extracting the entire production tube and of its equipment and casing the well again (like a new well) with the installation of a new control line of the traditional type and a new safety valve, exactly as in a new well.
- This solution which then makes it possible to work according to safety standards, is extremely heavy and expensive.
- the present invention provides a new solution for restoring an oil well whose hydraulic control line is defective, without having to kill the well and retub it.
- the objective of the invention is to equip the well with a new bottom safety device with hydraulic control independent of the original control line, while respecting safety standards, and this, by implementing a considerably lighter procedure than the second solution mentioned above.
- one of the objects of the invention is to provide a new method for restoring wells to safety and a new bottom safety valve, known as a special valve, as well as various equipment (new control line, element for raising the the wellhead, tools and methods for installing or removing the new line of command) which make it possible to implement the process of safety aimed by the invention.
- production tube the tube located in the center of the well to guide the effluents (tubing),
- the process in accordance with the invention for restoring an oil well equipped with a bottom safety valve - said original valve - whose hydraulic control line - said original line - is defective consists in replacing the original valve by a special bottom valve comprising, along its axis and in the upper part, hydraulic connection means, at its periphery, means for sealing off or sealing the original control line, and , in the lower part, a movable shutter member operable upon closing by the action of a pressurized fluid arriving axially by the hydraulic connection means, to be installed inside the production tube, along the axis of this, a new hydraulic control line, called a concentric control line, and to connect said concentric control line to the hydraulic connection means of the special valve.
- the method of the invention makes it possible to provide the well with a new bottom safety, the originality of which is to be controlled by a line internal to the production tube, the original line being disused (line which passes through the receptacle sleeve and rises to the surface between the production tube and the external casing). ''
- the special valve isolates or closes the inlet lights of this original line through the receptacle sleeve.
- the special valve then fulfills exactly the same role as a traditional safety valve and allows operation of the well in accordance with safety standards.
- the special bottom valve used in the process of the invention preferably comprises the following means which already exist in conventional safety valves (down hole safety valve):
- a movable shutter member located in the lower part of said body and urged towards its closed position
- tubular slide arranged to be able to slide longitudinally inside the valve body in order to generate in its downward movement the opening of the shutter member
- an anchoring system located in the upper part of the valve body and adapted to secure it in a receptacle sleeve housed in the production tube,
- Said special valve is characterized in that it comprises, combined with the above means:
- an internal piston extending along the axis of the valve body, a pusher carried by the lower part of the internal piston and arranged in the valve body above and in contact with the slide so as to being able to push said slide down during a downward movement of the internal piston,
- At least two sets of seals arranged on the external face of the valve body and offset over its height so as to insulate the original hydraulic control line from the production tube.
- the pusher is constituted by a section of tube sliding in the valve body and carried by the internal piston by means of radial arms which make it integral with the latter.
- the hydraulic connection means comprising a male connector, mounted at the head of said axial socket and adapted to cooperate with a conjugate female connector secured to the hydraulic control line.
- the valve anchoring system can be a mechanical system of known type, comprising in particular anchoring dogs, a dog locking socket and a return spring of said locking socket.
- the procedure for replacing the original valve with the special valve defined above and for installing the concentric control line advantageously comprises the following successive operations: (a) mounting an airlock on the well head,
- Such a procedure respects the so-called three barrier safety rule: when the wellhead is removed, the well is protected by three safety barriers; at the bottom of the well, by the plug ("plug”); at an intermediate depth, by the conventional valve temporarily installed in operation (d); on the surface, by the non-return valve ("BPV”).
- the operations (a) - (f), (h) - (j), (m), (n), are conventional operations in themselves which are rapid, without difficulty, and use devices classics well known to oil well professionals.
- the special bottom valve can be installed using a standard type cable lowering device, equipped with means for hooking said valve and means for holding its shutter member in open position. This procedure is well known to professionals for installing a bottom safety valve in an oil well.
- the wellhead raising element is intended to be fixed on the suspension assembly of the production tube in order to allow, on the one hand, the mechanical maintenance of the concentric control line inside the tube production, on the other hand, the hydraulic supply of this line.
- this raising element comprises, in particular, a lateral fluid passage channel which will be used to supply the line, as well as retaining means which are arranged to have two positions: a retaining position where they maintain the the command line, and a withdrawal position where they leave the central passage free.
- Another object of the invention is to provide a new hydraulic control line, called a concentric control line, which is to be set up in operation (1) along the axis of the production tube to control the special valve of safety previously defined.
- this line comprises, on the one hand, a plurality of sections, called current sections, intended to be placed end to end along the axis of the production tube, on the other hand, an upper section intended to be disposed at the end upper of the current sections, finally a head system intended to be attached to the well head raising element already mentioned.
- each running section of said line comprises, from top to bottom, a male connector, a first hollow connector holder at the upper end of which the male connector is secured, a first centering device arranged around the first connector holder for centering the latter in the production tube of the well, a hydraulic connection tube secured to the lower end of the first connector holder, a second hollow connector holder secured to the lower end of the hydraulic connection tube, a second centralizer arranged around the second connector holder to center it in the production tube of the well, and a female connector secured to the lower end of the second connector holder.
- the upper section of the line comprises a tubular sleeve, a male connector and a female connector respectively secured to the upper end and to the lower end of said tubular sleeve, and at least one centering device arranged around the tubular sleeve to center the latter. in the production tube of the well.
- the head system of the line comprises a suspension block adapted to be housed in the raising element, hooking means secured to the upper part of said suspension block for hooking by means of a tool. installation or removal, a socket extending downwards and secured under the suspension block to slide the tubular sleeve of the upper section, sealing means between socket and tubular sleeve, hydraulic connection means putting in communication, through the suspension block, said sleeve and the means for passing the fluid of the raising element, and of the centering fins secured around the sleeve to center the latter in the production tube of the well.
- the male connector of each line section is identical to the male connector of the special valve and essentially comprises a connector body provided with a penetrating nose in a female connector and pierced longitudinally with a hydraulic passage, nose anchoring structures connector in the female connector, a valve for closing the hydraulic passage, elastic means urging the valve towards its closed position, and a valve stem housed in the connector nose in order to push the valve towards the open position when the male connector is connected into a female connector.
- the female connector of the line sections is conjugated with the male connector described above and comprises a connector body provided with a housing for the nose of a male connector and pierced longitudinally with a hydraulic passage, a movable anchoring member. in the transverse direction between an anchoring position corresponding to the locking of the anchoring structures of the male connector and an erasing position where it releases said anchoring structures, elastic means urging the anchoring member towards its position d anchorage, an internal structure for erasing the anchoring member under the pressure of the nose of a male connector, an unlocking cam projecting at the periphery of the connector body in order to ensure the erasure of the anchoring member and unlocking of the connectors under the effect of the pressure of a sliding surface around the connector, a valve for closing the hydraulic passage, elastic means urging the lad ite valve to its closed position, and a valve stem housed in the body in order to maneuver the valve to its open position when the male connector is anchored in the female connector.
- Such connectors male and female, are capable of cooperating and of locking to one another, by simple pressure, in a secure, automatic and sealed manner. Before locking, they are closed by their valve or valve, which prevents pollution of the sections of the control line (or of the internal tube of the special valve) by the effluent present in the production tube. Their opening takes place at the end of locking and allows the passage of the control fluid.
- each female connector can be unlocked by the external pressure of a surface on its unlocking cam.
- the installation of line sections in the production tube can thus be ensured, section by section, using a standard type cable lowering device, equipped with a laying tool provided with such a connector.
- female in the lower part. This female connector will be hooked on the male connector of the line section in order to lower it.
- a shear pin with which the setting tool is provided is sheared by threshing and releases an unlocking sleeve fitted to said fitting tool: this sleeve acts on the unlocking cam of the female connector of the fitting tool and the latter, released, can be reassembled and reset by means of a new pin for the establishment of the next section.
- the removal of each section of line can be carried out by means of a similar cable lowering device, equipped with a removal tool comprising a push tube. The latter will be used to unlock the section of line which is to be removed, from the lower section, by acting on the unlocking cam of its female connector (by means of the section centralizers as will be better understood later).
- the invention makes it possible, by simple operations and of the usual type for oil well professionals, to restore safety to an oil well while respecting safety standards and to carry out all the necessary procedures on the new installation, in particular the removal of the special bottom valve and that of the concentric control line if necessary.
- FIGS. 1 to 10 are diagrams illustrating the various phases of the process according to the invention for restoring an oil well to safety
- FIGS. 11 and 12 are axial sections of a special bottom valve according to the invention, respectively in the closed position and in the open position,
- FIGS. 13 and 14 are cross sections of said special valve by planes A and B,
- FIG. 15 is a detail view, in axial section, of the male connector that provides said special valve
- FIG. 16 is an axial section of a wellhead raising element, fixed to the suspension assembly of the well, the head system of the hydraulic control line being represented in place in said raising element,
- FIG. 17 is a cross section through a plane C of the assembly shown in FIG. 16,
- FIGS. 18, 19 and 20 are axial sections respectively of the head system, of the upper section, and of a current section of a concentric control line according to the invention
- FIG. 21 is a detail view in section of a current section in the unlocked position
- FIG. 22 is a detail view in axial section of the female connector fitted to the sections of the line
- FIG. 23 is a detail view in axial section showing a female connector and a male connector coupled and locked
- FIGS. 24 and 25 illustrate the operation of placing the special valve in the sleeve-receptacle of the well, by means of a setting tool
- FIGS. 26 and 27 are cross sections through planes D and E of the special valve and of the fitting tool in the position of FIG. 24,
- FIGS. 28 and 29 are detailed sectional views of a concentric control line fitting tool, respectively in the armed position and in the unlocked position,
- FIGS. 30, 31 and 32 illustrate the operations of laying a section of control line in the production tube of the well
- FIG. 33 illustrates the installation of the head system of said concentric control line
- FIG. 34 is an axial section of a tool for removing a section of concentric control line
- FIG. 35 is a section through a transverse plane F
- FIG. 36 illustrates the operation of removing a section of concentric control line
- Figures 37, 38, 39 and 40 illustrate the operations of removing a special valve according to the invention.
- the first operation of the method (FIG. 1), well known in itself to professionals, consists in equipping the wellhead 7 with an airlock 8 through which the cable passes with a standard descent device 9. With this cable are suspended the tools necessary for the operations to be executed.
- the original valve 6 is extracted from the well by means of a traditional recovery tool 10 ( Figure 2).
- the production tube 1 is then released and are successively installed therein, as shown in FIG. 3, a well bottom plug 11 ("plug"), a conventional bottom valve 12 in the closed position in the sleeve- receptacle 5 of the original valve (this conventional valve 12 can be the original valve 6 itself after verification or a different valve of the same type) and, on the surface, a non-return valve 13 ("BPV: Back Pressure Valve ”) which is hung in the suspension assembly 3.
- plug well bottom plug 11
- a conventional bottom valve 12 in the closed position in the sleeve- receptacle 5 of the original valve
- BPV Back Pressure Valve
- FIG. 4 shows schematically the well thus freed from surface equipment.
- FIG. 5 An element 14 for raising the wellhead is then put in place (FIG. 5) which will later make it possible to subject and supply the new hydraulic control line.
- This raising element 14 which will be described in detail below, is fixed on the suspension assembly 3 by studs which pass through the flange of said assembly (flange conventionally used to fix the well head thereon).
- the well head 7 and the airlock 8 are then replaced as illustrated in FIG. 6.
- the well head is fixed by studs to the raising element 14.
- the production tube 1 is then released as shown in FIG. 8.
- the special safety valve (generally referenced 15 in FIG. 9) can then be placed in the receptacle sleeve 5 which contained the original valve.
- the special valve, the fitting operation thereof (which is carried out using the cable lowering device 9) and the fitting tool used will be detailed below.
- a hydraulic control line for this valve is put in place, called a concentric control line (generally referenced 16 in FIG. 10).
- This line extends inside the production tube 1 along the axis thereof and is hydraulically connected to an inlet for control fluid 17 through the raising element 14.
- This line, its setting in place (which is carried out using the cable lowering device 9) and the tools used will be detailed below.
- a conventional pressure test is performed on the concentric control line to verify the proper functioning of the special valve.
- the airlock 8 can then be removed.
- the well is again in a production situation with a Bottom safety valve which guarantees operation according to safety standards.
- the special safety valve 15 is shown in detail in Figures 11 to 15.
- the valve is shown in axial section in the closed position in the receptacle sleeve 5 (shown in broken lines).
- 5a the passage of fluid from the sleeve-receptacle which supplied the original valve
- 5b the anchoring groove with which the sleeve-receptacle is equipped, with its lower stop shoulder 5c ("no-go" ).
- the valve is shown in axial section in the open position, the receptacle sleeve not being drawn.
- Said special valve comprises a valve body 18 of generally tubular shape, conventionally consisting of several tubular parts secured to each other; the upper part 18a of the body is secured to the lower part 18b by shear screws 19 in order to allow, in a manner known per se, to unlock the valve during its removal.
- valve body Inside the body is mounted a tubular slide 20 able to move longitudinally in the body between a low position (corresponding to the opening of the valve: figure 12) and a high position (corresponding to its closing: figure 11) .
- This slide is returned to its high position by a return spring 21 and is controlled downward, as will be seen, by the pressurization of the concentric control line 16.
- the valve body contains a member mobile shutter constituted in the example by a valve 22 which is articulated on said body so as to be able to pivot between an open position where it is retracted on the side by the slide 20 (FIG. 12) and a closed position where said valve - released by raising said slide - closes the valve body by pressing against a seal carried by it.
- the valve 22 is returned to the closed position by a spring arranged around its axis of articulation.
- this shutter member well known in itself, can be of another type and in particular a ball member which ensures the shutter by a spherical part able to move longitudinally with an associated rotation .
- the body contains a mechanical dog anchoring system which can be of any known type and which is intended, during the positioning of the valve in the production tube, to anchoring it in the receptacle sleeve 5.
- This anchoring system can in particular be of the type shown in FIGS. 11 and 12, comprising anchoring dogs 23 movable radially so as to be able to penetrate into the groove anchor 5b of the receptacle sleeve, a dog locking sleeve 24, slidingly mounted in the body and having a peripheral cam 24a adapted to be able to repel the dogs radially, and a return spring 25 urging the locking sleeve 24 towards the high.
- These various organs exhibit, during the installation or removal of the special valve, a conventional operation which is found in most known valves.
- the slide 20 defines a sealed volume 29 between its peripheral face and the internal face of the valve body (the internal diameter of which is enlarged for this purpose).
- This sealed volume, filled with oil, is delimited, in the upper part, by a seal 30 located at the interface between body and slide, and in the lower part, by a seal 31 of the same diameter as the attached 30.
- the return spring 21 of the slide is disposed in the sealed volume 29, bearing, on the one hand, against a stop piece 33 of the valve body, on the other hand, against an annular rib 34 of the slide, which projects into the sealed volume 29.
- the valve further comprises an internal piston 26 extending along the axis of its tubular body 18.
- the lower end 32 of the piston is profiled to reduce turbulence at the heart of the effluent called to flow in the valve.
- This piston 26, of small diameter compared to the internal diameter of the body carries at its lower part a pusher 27 constituted by a section of tube arranged in the valve body in order to be able to slide therein.
- This tube section is secured to the internal piston 26 by radial arms 28 (in the example two in number).
- This tubular pusher 27 is disposed above and in contact with the slide 20 so as to be able to push said slide down during a downward movement of the internal piston 26. In the absence of downward force exerted on the piston , the pusher 27 leaves the slide free to go up under the action of its return spring 21 (then pushing said pusher), causing the valve 22 to tilt and the valve to close.
- the internal piston 26 slides in an axial sleeve 36 which is secured to the valve body by radial arms 37, in this example two in number. Seals 38 at the socket / piston interface allow a sealed telescopic movement of the internal piston in the socket between a high position corresponding to the closing of the valve 22 (FIG. 11) and a low position corresponding to its opening (FIG. 12 ).
- the upper end of the axial sleeve is provided with an external thread 35.
- a male connector 39 is screwed onto the thread 35 of the axial socket 36.
- This male connector is adapted to cooperate with a conjugate female connector equipping the concentric control line 16 in order to achieve a tight automatic locking by simple pressure of the two connectors.
- FIG. 15 represents an exemplary embodiment of such a male connector 39.
- the conjugated female connector will be presented in detail with reference to the Figure 21 when describing the concentrated command line).
- This male connector comprises a connector body 40 produced in two parts 40a, 40b screwed into one another, with the interposition of a seal 40c.
- the part 40a is itself screwed by its thread 35 onto the end of the sleeve 36, however, on the other hand, the part 40b forms an elongated nose 41 intended to penetrate into a conjugate female connector.
- This nose is provided with anchoring structures 42 in this female connector, in the example an annular rib having a conical access ramp 42a and a stop shoulder 42b.
- the parts 40a, 40b forming the connector body are hollow and delimit a hydraulic passage for the control fluid.
- a valve 43 is disposed in this hydraulic passage to close the latter when the male connector is not engaged with a female connector.
- a spring 44 resiliently biases the valve towards its closed position; the valve 43 is extended by a rod 45 housed in the nose 41 in order to push said valve towards the open position when the male connector is connected to the female connector.
- the body 18 of the special valve carries, on its external face, two sets of seals 46 and 47, in particular of the herringbone type, which are arranged to be positioned on either side of the passage of the fluid 5a of the receptacle sleeve when the valve is anchored therein. These fittings isolate the original command line which no longer has any effect.
- the special valve according to the invention comprises or may comprise any other known means with which the bottom safety valves are generally provided (in particular profile 48 for attaching the installation and removal tool, which means that we see in Figures 11 and 12 at the top of the valve body).
- FIGS. 16 and 17 show the element 14 of the wellhead riser, which makes it possible to secure and supply the concentric control line which descends towards the special valve along the axis of the production tube.
- This raising element comprises a body 49 called to be fixed on the suspension assembly 3.
- This body is provided, on its lower underside, with tapped blind holes (not visible) for the screwing of studs through the flange of the suspension set.
- the same fixing means are provided on the upper face of the body 49 for fixing it to the flange of the well head 7.
- the body 49 is provided with a central bore with a diameter at least equal to that of the production tube 1 (preferably equal to the bore of the well head 7) and a lateral channel 50 opening into said bore for the passage of control fluid.
- This channel is intended to be connected, in a conventional manner, with the inlet conduit for the control fluid symbolized at 51.
- the body 49 is provided with means for retaining the concentric control line (means for retaining the suspension block which the latter comprises at its upper end and which can be seen at 56 in FIG. 16).
- These retaining means comprise, in the example, stop screws such as screws 52 and screws 53 arranged at two levels in the body. Each level includes at least three stop screws regularly distributed around the body (three 120 ° screws have been shown in Figures 16 and 17).
- Each screw passes through the body so as to protrude at the end of tightening in the bore thereof by a stop end 52a, 53a; it can be erased by unscrewing.
- Sealing means such as rafter seals 54 provide sealing along the screws.
- a shoulder 55 provides a metal / metal seal.
- the two levels of stop screw are offset in height in order to be able to be positioned below and above the suspension block 56 in order to retain the latter, while allowing its rapid release during the removal of the control line.
- the concentric control line 16 called to hook onto the raising element 14 is shown in FIGS. 18 to 23.
- This line is formed by a head system shown in axial section in FIG. 18, by an upper section shown in axial section in FIG. 19 and by common sections such as shown in axial section in FIG. 20.
- the head system comprises a suspension block 56 already mentioned, adapted to be housed in the raising element 14 so as to be retained by the stop screws 52 and 53 thereof.
- This block is provided at its upper part with a hooking profile 57 intended to cooperate with combined means of a fitting or removal tool.
- This block is hollowed out with a blind internal channel 58 along its axis and with a lateral channel 59 putting this internal channel 58 into communication with the lateral channel 50 of the raising element.
- Two annular seals such a gue 60 seal between the two channels at the block / riser interface.
- the suspension block 56 carries a sleeve 61 which extends downward and is provided with centering fins such as 62 towards its lower end in order to center said sleeve in the production tube of the well.
- centering fins such as 62 towards its lower end in order to center said sleeve in the production tube of the well.
- three 120 ° fins are provided around the bushing.
- the upper section of line (FIG. 19) comprises a tubular sleeve 63 of diameter adapted to slide into the bushing 61. Sealing means such as seals 64 ensure sealing at the interface between these elements.
- the length of the sleeve 63 is adjusted as a function of the height of the well. production so that said sleeve, positioned above the current sections (of standardized length), enters the bushing 61 at the end of positioning of the line.
- the sleeve 63 is provided with a male connector 65 identical to that already described for the special valve, in order to allow the installation or the removal of the upper section.
- the sleeve 63 is provided with a female connector 66 identical to those of the current sections (described below) in order to be able to connect with the male connector of the current section from below.
- centralizers 67 and 68 are slidably mounted for friction around the sleeve 63 to center the latter in the production tube.
- the upper centering device 67 will be pushed back by the sleeve 61 during the positioning of the line to remain, by the play of friction, below the lower end of the latter.
- the lower centering device 68 is similar to the lower centering device which is fitted to each current section described below, with a view to fulfilling, in addition to the centering function, a function of unlocking the female connector of the section during the removal of the line.
- Each running section ( Figure 20) of standardized length for example of the order of seven meters, comprises an upper male connector 69 (identical to that of the special valve) screwed to the upper end of a hollow connector holder 70.
- This connector holder 70 is provided a centering device 71 mounted frictionally around it so that it can slide.
- This centering device can be constituted by a tubular element around which three 120 ° fins are welded.
- Annular seals such as 72 at the connector holder / centering interface ensure appropriate friction forces to avoid spontaneous displacement of the centering device in the absence of pushing force, while allowing such displacement downwards when it is subjected to a pushing force when removing the section.
- Stop structures, such as shoulder 73 limit the upward movement of the centering device and define its normal position when the line is in place.
- the connector holder 70 is screwed by its lower end into a hydraulic connection tube 74 which makes it possible to give the section the desired standardized length.
- This tube 74 is itself screwed at the bottom onto a hollow connector holder 75 similar to the previous one; the latter carries, at its other end, a female connector 76, screwed thereon.
- the connector holder 75 is provided with a centering device 77 having fins similar to the centering device 71 and mounted in friction in the same way so as to be able, in the event of pushing down, to slide along the connector holder 75 and the female connector. 76.
- FIG. 20 shows the centering device in its normal working position (high position).
- the detail figure 21 shows the centralizer in its stop position for which its tubular element produces the unlocking of the female connector. by pressing the cam to unlock it.
- FIG 22 is an axial detail section of the female connector 76, called to cooperate with the male connector 39 already described.
- This female connector comprises a connector body 80 (made in two hollow parts like the male connector) which is provided with an interior housing for the nose of the male connector.
- a movable anchoring member 81 is disposed in this housing in order to be able to cooperate with the anchoring structures of the male connector.
- This anchoring member 81 movable in the transverse direction, is biased towards its anchoring position by a spring 82 and comprises an erasing structure such as an inclined ramp 81a which allows it to be erased under the thrust of the nose of the male connector.
- the latter can thus be placed in the anchoring position by simple pressure, its anchoring structure cooperating with the anchoring member 81 of the female connector; the locking is effected by means of a stop shoulder 81b which the anchoring member comprises.
- the anchor member 81 carries an unlocking cam 83 projecting slightly outside the body 80 in order to ensure erasure of the anchor member and its unlocking under the effect of the pressure of a surface on the cam.
- the unlocking can be provided automatically, during removal, by the cylindrical surface of the centralizer 77 of the connector holder when said centralizer reaches its low position.
- the female connector 76 includes a valve 84 for closing its internal passage, associated with a spring 85 which urges it towards the closed position. This valve is provided with a rod 86 which is called upon to cooperate with the valve rod 45 of the male connector in order to maneuver the valve towards its open position when the male connector is anchored in the female connector.
- FIG. 23 shows schematically a male connector and a female connector in the connected position.
- Figures 24 to 27 illustrate the installation operation of the special valve according to the invention. This operation is carried out, as already indicated in the general description of the process (FIG. 9), by means of a standard type cable lowering device which is equipped with a positioning tool 87 known per se. This known tool will not be described in detail: it is provided with means for hooking the valve (fingers 88 cooperating with the hooking profile 48 of the valve) and means for holding its shutter valve in the open position.
- tube sector 89 which extends the tool downwards: in English "prong”
- This tube sector 89 has a section adapted to be able to pass and slide in the space separating the two radial arms 28 of the special valve as shown in FIG. 26 (section at this level).
- the tubular part 90 of the tool ("probe"), which is called upon to move the sleeve 24 of the valve down during installation in order to release the anchoring dogs 23, is shaped into two tube sectors 90a, 90b, in order to allow it to pass through the radial arms 37 of the special valve, as shown in FIG. 27 (section at this level).
- the installation tool 87 is a conventional tool, in particular provided with a shear pin (not visible) which is broken during installation.
- the valve fitting operation is carried out according to a known procedure: the tool is hung on the valve, then introduced into the airlock 8 and lowered into the well.
- the valve is in place in its receptacle sleeve 5 (valve placed on the "no-go" 5c of the receptacle sleeve, anchoring dogs 23 located opposite the anchoring groove of said receptacle sleeve: FIG. 24)
- a hammering down of the tool is operated to break the shear pin of the latter.
- Part 90 releases the sleeve 24 which rises under the action of its spring and locks the anchor dogs 23 in the anchoring groove 5b of the receptacle sleeve.
- sector 89 releases the shutter valve 22 which closes under the action of its spring.
- FIGS. 28 to 33 operations schematically overall in FIG. 10, already commented on in the general description of the process).
- the installation tool shown in FIGS. 28 and 29 is used to equip the standard cable lowering device to lay a current section of line or the upper section.
- This tool which is represented in FIG. 28 in the armed position, ready to grasp a section, comprises a hooking head 91 provided with a profile adapted for its attachment to the descent device, a mandrel 92 carrying in the lower part a female connector 93 of the type already described, and an unlocking sleeve 94 which is screwed into the head 91 and which carries the mandrel 92 by means of a shear pin 95.
- the shearing of the pin 95 allows the unlocking sleeve 94 to move downward relative to the mandrel 92: the tubular lower part 94a of this sleeve which is arranged around the female connector 93 then ensures unlocking this connector by pressing on its unlocking cam 83.
- FIG. 30 shows the descent of a current section of line into the production tube by means of the aforementioned tool, the section having been, on the surface, hooked and locked by its male connector to the female connector of the tool. The descent continues until hooking and locking the female connector located at the bottom of the section with the male connector of the lower section already in place (or with the male connector of the special valve if it is the first section of the line). A hammering down of the setting tool is then carried out to generate shearing of its safety pin ( Figure 31).
- the female connector of the tool is unlocked by the descent of the sleeve 94 and the male connector of the line section is released.
- the tool can be reassembled ( Figure 32) and reset using a new shear pin for the establishment of the next section. This rearming, carried out on the surface, is carried out after having partially unscrewed the sleeve 94 relative to the head 91 in order to release the pin hole.
- FIG. 33 illustrates the installation of the head system of the control line, with a conventional tool 96 which is hung on the attachment profile of the suspension block 56 of said system.
- the assembly is lowered to the cable until the sleeve 61 of the system engages around the tubular sleeve 63 of the upper section and that the block 56 abuts with the lower stop screws 52 (previously arranged in internal projection in their restraint position).
- the upper stop screws 53 can be screwed to block the suspension block, and the setting tool can be released and reassembled in the conventional manner.
- the concentric control line is first removed: the head system of this line is removed by unscrewing the stop screws and reassembled to the cable, then the line sections are deposited, section after section.
- Figures 34 and 35 show the removal tool which is required to equip the standard cable device to deposit each section of line.
- This tool comprises a head 97 for attachment to the lowering device, a female connector 98 of the aforementioned type, secured under the attachment head 97, and a push tube 99 attached to said head 97 and passing around the female connector 98 with a light 99a at the unlocking cam of this connector in order to leave it free.
- the push-tube 99 extends downwards over a length adapted to be able to slide around a section of line and push the centralizers of the latter up to the level of the cam for unlocking the female connector of said section.
- the push-tube 99 Towards its lower end, the push-tube 99 has centering fins 100, in this example three in number at 120 °, in order to center the push-tube in the production tube when it is lowered therein. .
- Figure 36 illustrates the operation of removing a section of line using the tool defined above.
- the tool is lowered to the cable until its push tube 99 engages around the line section.
- the descent is continued and the push tube 99 pushes down the centralizers 71 and 77 of the line section.
- the lower centralizer 77 reaches its unlocking position in which it clears the unlocking cam of the female connector 76 of the section: this female connector is released from the male connector of the lower line section (or of the special valve for the last section), however, in the upper part, the female connector 98 of the tool is locked on the male connector 69 located at the upper end of the line section.
- the removal tool can then be reassembled with the line section hooked under its female connector 98. On the surface, the line section is released and removed by pressing the cam of said female connector through lumen 99a. The removal tool is then ready to extract another section of line.
- FIGS. 36 to 39 illustrate the removal of the special valve, once its concentrated control line has been deposited, as has just been described.
- This removal is carried out conventionally by means of a recovery tool 101 fitted to the standard cable lowering device.
- This recovery tool is provided with latching fingers 102 which cooperate with the latching profile 48 of the valve.
- an upward hammering by percussion is implemented to break the shear screws 19 of the special valve: the upper part 18a of the valve body is moved upwards ( Figure 37 ) and drives the socket 24 for locking the released dogs (FIG. 38).
- the valve can then be reassembled, its sleeve 24 driving the lower part 18b of the valve body.
Landscapes
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Types And Forms Of Lifts (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96916205A EP0854967B1 (fr) | 1995-05-30 | 1996-05-15 | Procede et moyens pour la remise en securite d'un puits petrolier en cas de defaut de la ligne de commande hydraulique de sa vanne de securite de fond |
AU59042/96A AU5904296A (en) | 1995-05-30 | 1996-05-15 | Method and devices for making safe an oil well in the event of a defect in the hydraulic control line of its bottom safe ty valve |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR95/06628 | 1995-05-30 | ||
FR9506628A FR2734863B1 (fr) | 1995-05-30 | 1995-05-30 | Procede et moyens pour la remise en securite d'un puits petrolier en cas de defaut de la ligne de commande hydraulique de sa vanne de securite de fond |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1996038651A2 true WO1996038651A2 (fr) | 1996-12-05 |
WO1996038651A3 WO1996038651A3 (fr) | 1997-01-23 |
Family
ID=9479649
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1996/000733 WO1996038651A2 (fr) | 1995-05-30 | 1996-05-15 | Procede et moyens pour la remise en securite d'un puits petrolier en cas de defaut de la ligne de commande hydraulique de sa vanne de securite de fond |
Country Status (5)
Country | Link |
---|---|
EP (2) | EP0854967B1 (fr) |
AU (1) | AU5904296A (fr) |
FR (1) | FR2734863B1 (fr) |
OA (1) | OA10544A (fr) |
WO (1) | WO1996038651A2 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102758600A (zh) * | 2012-06-21 | 2012-10-31 | 中国石油天然气股份有限公司 | 水平井声控压差平衡式开关器 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2820457B1 (fr) | 2001-02-02 | 2003-08-01 | Inst Francais Du Petrole | Vanne de securite a installation directe dans un tube de production d'un puits petrolier et procede de mise en oeuvre |
US8100181B2 (en) | 2008-05-29 | 2012-01-24 | Weatherford/Lamb, Inc. | Surface controlled subsurface safety valve having integral pack-off |
US7775291B2 (en) | 2008-05-29 | 2010-08-17 | Weatherford/Lamb, Inc. | Retrievable surface controlled subsurface safety valve |
CA2696583C (fr) | 2009-03-20 | 2013-02-26 | Weatherford/Lamb, Inc. | Ensemble de support de tubage capillaire pour le deploiement de ligne de commande dans une tete de puits existante |
US8479828B2 (en) | 2010-05-13 | 2013-07-09 | Weatherford/Lamb, Inc. | Wellhead control line deployment |
CN105089532B (zh) * | 2014-05-14 | 2018-05-04 | 中国石油天然气股份有限公司 | 油田水平井油管防落装置 |
US11578561B2 (en) * | 2020-10-07 | 2023-02-14 | Weatherford Technology Holdings, Llc | Stinger for actuating surface-controlled subsurface safety valve |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3638970A (en) * | 1968-02-12 | 1972-02-01 | Becker Drilling Alberta Ltd | Joint for double-walled drill pipe |
US3675718A (en) * | 1970-09-11 | 1972-07-11 | Exxon Production Research Co | Conducting operations in a well through a normally closed valve |
US3739846A (en) * | 1972-01-19 | 1973-06-19 | Rockwell Mfg Co | Head to hanger hydraulic connection |
GB1341666A (en) * | 1971-11-19 | 1973-12-25 | Camco Inc | Well safety valve |
US3806168A (en) * | 1972-09-06 | 1974-04-23 | Gray Tool Co | Control line installation for down-hole safety valves |
US4067596A (en) * | 1976-08-25 | 1978-01-10 | Smith International, Inc. | Dual flow passage drill stem |
US4458903A (en) * | 1982-12-27 | 1984-07-10 | W-K-M Wellhead Systems, Inc. | Control line sealing connection |
GB2147336A (en) * | 1983-09-27 | 1985-05-09 | Ava Int Corp | Wire line running and/or pulling tool |
US4691776A (en) * | 1986-05-29 | 1987-09-08 | Camco, Incorporated | Retrievable well safety valve with expandable external seals |
EP0565287A1 (fr) * | 1992-03-31 | 1993-10-13 | Philip Frederick Head | Conduit ondulé ancré à l'intérieur d'un tube flexible |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3696868A (en) * | 1970-12-18 | 1972-10-10 | Otis Eng Corp | Well flow control valves and well systems utilizing the same |
US4469179A (en) * | 1981-12-17 | 1984-09-04 | Otis Engineering Corporation | Safety system |
US4844166A (en) * | 1988-06-13 | 1989-07-04 | Camco, Incorporated | Method and apparatus for recompleting wells with coil tubing |
US5042584A (en) * | 1990-12-05 | 1991-08-27 | Mcmurray Oil Tools, Inc. | Stacked water regulator and method of use |
US5427133A (en) * | 1993-08-26 | 1995-06-27 | Camco International Inc. | Coiled tubing wireline retrievable and selective set gas lift assembly |
-
1995
- 1995-05-30 FR FR9506628A patent/FR2734863B1/fr not_active Expired - Fee Related
-
1996
- 1996-05-15 EP EP96916205A patent/EP0854967B1/fr not_active Expired - Lifetime
- 1996-05-15 EP EP02075433A patent/EP1205629A3/fr not_active Withdrawn
- 1996-05-15 WO PCT/FR1996/000733 patent/WO1996038651A2/fr active IP Right Grant
- 1996-05-15 AU AU59042/96A patent/AU5904296A/en not_active Abandoned
-
1997
- 1997-11-28 OA OA70144A patent/OA10544A/fr unknown
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3638970A (en) * | 1968-02-12 | 1972-02-01 | Becker Drilling Alberta Ltd | Joint for double-walled drill pipe |
US3675718A (en) * | 1970-09-11 | 1972-07-11 | Exxon Production Research Co | Conducting operations in a well through a normally closed valve |
GB1341666A (en) * | 1971-11-19 | 1973-12-25 | Camco Inc | Well safety valve |
US3739846A (en) * | 1972-01-19 | 1973-06-19 | Rockwell Mfg Co | Head to hanger hydraulic connection |
US3806168A (en) * | 1972-09-06 | 1974-04-23 | Gray Tool Co | Control line installation for down-hole safety valves |
US4067596A (en) * | 1976-08-25 | 1978-01-10 | Smith International, Inc. | Dual flow passage drill stem |
US4458903A (en) * | 1982-12-27 | 1984-07-10 | W-K-M Wellhead Systems, Inc. | Control line sealing connection |
GB2147336A (en) * | 1983-09-27 | 1985-05-09 | Ava Int Corp | Wire line running and/or pulling tool |
US4691776A (en) * | 1986-05-29 | 1987-09-08 | Camco, Incorporated | Retrievable well safety valve with expandable external seals |
EP0565287A1 (fr) * | 1992-03-31 | 1993-10-13 | Philip Frederick Head | Conduit ondulé ancré à l'intérieur d'un tube flexible |
Non-Patent Citations (1)
Title |
---|
See also references of EP0854967A2 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102758600A (zh) * | 2012-06-21 | 2012-10-31 | 中国石油天然气股份有限公司 | 水平井声控压差平衡式开关器 |
CN102758600B (zh) * | 2012-06-21 | 2015-05-13 | 中国石油天然气股份有限公司 | 水平井声控压差平衡式开关器 |
Also Published As
Publication number | Publication date |
---|---|
AU5904296A (en) | 1996-12-18 |
EP0854967A2 (fr) | 1998-07-29 |
WO1996038651A3 (fr) | 1997-01-23 |
FR2734863B1 (fr) | 1997-08-29 |
FR2734863A1 (fr) | 1996-12-06 |
EP1205629A3 (fr) | 2003-01-29 |
OA10544A (fr) | 2002-05-29 |
EP0854967B1 (fr) | 2002-08-14 |
EP1205629A2 (fr) | 2002-05-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0574326B1 (fr) | Dispositif, système et méthode de forage et d'équipement d'un puits latéral | |
EP0134734B1 (fr) | Procédé et dispositif de mesure dans un puits pétrolier | |
EP0132423B1 (fr) | Méthode et dispositif de mesure et d'intervention dans un puits | |
EP0423296B1 (fr) | Dispositif de coiffage d'un puits en eruption libre | |
FR2653199A1 (fr) | Soupape de commande d'ecoulement d'un fluide dans une conduite de transport de fluide dans un puits souterrain et procede pour faire fonctionner une soupape de fond de puits. | |
EP0321610B1 (fr) | Vanne de sécurité pour puits pétrolier et outils de pose et de repêchage pour ladite vanne | |
FR2715985A1 (fr) | Vanne de sécurité pour un arbre horizontal. | |
EP1525371A1 (fr) | Conduite de guidage telescopique de forage en mer | |
EP0307266B1 (fr) | Procédé et dispositif pour manoeuvrer des équipements spécialisés d'intervention dans un puits foré ayant au moins une section fortement inclinée par rapport à la verticale | |
EP0267638B1 (fr) | Vanne de sécurité pour puits pétrolier, autorisant un fonctionnement en débit artificiel | |
FR2581699A1 (fr) | Equipement pour train de tiges, tel qu'un train de tiges de forage, comprenant un raccord a fenetre laterale pour le passage d'un cable | |
EP0293355A1 (fr) | Dispositif de contrôle du verrouillage d'un carottier de sondage | |
EP0854967B1 (fr) | Procede et moyens pour la remise en securite d'un puits petrolier en cas de defaut de la ligne de commande hydraulique de sa vanne de securite de fond | |
EP0548303B1 (fr) | Methode pour poursuivre des mesures apres la recuperation d'un outil de mesure immobilise dans un puits | |
EP0211725B1 (fr) | Dispositif de positionnement d'un outil dans un drain d'un puits foré | |
FR2536783A1 (fr) | Vanne de securite pour puits petrolier | |
FR2659386A1 (fr) | Equipement de lancement a distance de bouchons pour la cimentation de puits de forage sous-marins. | |
FR2458670A1 (fr) | Dispositif de carottage a la turbine avec tube suiveur | |
FR2692316A1 (fr) | Système et méthode de forage et d'équipement de forage latéral, application à l'exploitation de gisement pétrolier. | |
BE1011199A3 (fr) | Carottier. | |
FR2643127A1 (fr) | Vanne de securite pour puits petrolier du type autorisant un fonctionnement en debit artificiel, et procede de deverrouillage de ladite vanne | |
FR2602819A1 (fr) | Vanne de securite commandee par un fluide de surface pour puits petrolier et outil de montage de ladite vanne | |
EP0321609B1 (fr) | Vanne de securité pour puits pétrolier et outil de montage de ladite vanne | |
FR2602818A1 (fr) | Vanne de securite pour puits petrolier, partie constitutive et equipement accessoire | |
FR2634819A1 (fr) | Vanne de securite pour puits petrolier destinee notamment a etre inseree dans un manchon receptacle sans epaulement d'arret |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A2 Designated state(s): AU BR CA CN IS JP MX NZ RU SD SG US VN |
|
AL | Designated countries for regional patents |
Kind code of ref document: A2 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG |
|
AK | Designated states |
Kind code of ref document: A3 Designated state(s): AU BR CA CN IS JP MX NZ RU SD SG US VN |
|
AL | Designated countries for regional patents |
Kind code of ref document: A3 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1996916205 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1996916205 Country of ref document: EP |
|
NENP | Non-entry into the national phase in: |
Ref country code: CA |
|
WWG | Wipo information: grant in national office |
Ref document number: 1996916205 Country of ref document: EP |