DE1483776A1 - Line arrangement for a borehole system - Google Patents

Description

Otie Engineering Corporation

line arrangement for a well system

The invention relates to downhole or auger tools, and more particularly to a flow conduit assembly for use in a downhole rig such as it is during drilling a borehole is used, as well as Bohrlooh- or Erdbohrwerkzeuge for use in such a conduit arrangement.

The invention is particularly applicable to the drilling phases in exploration work in deep coastal waters where the production test of a supply of mineral resources is to be carried out.

The one during the initial production phase of a new The information obtained from oil and / or grass drilling is very valuable, especially if one has previously the reserve that has not yet been drilled is tapped for the first time. This information is usually used during of the first production steps after the production equipment has been set up and the normal source Hegel organs have been installed.

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In the cases as they · when carrying out exploratory drilling are present in deeper coastal waters, there are usually no permanent production facilities to deliver this production information for Disposal. No such facilities will be planned until the drilling station has proven successful has, so that the establishment of such facilities is justified. If this production information is desired it has therefore been customary to use the entire production wellhead on the borehole and then limited production attempts with the temporarily on the facilities to be accommodated on the drilling platform. After receiving the requested information, it was customary to plug the well deep inside the borehole and to put a sealing cap on the pipe connections and leave them on these connections until the production facilities are available. At this Time was then planned to have a working platform over bring the borehole, reopen the borehole and make the necessary permanent borehole connections.

This method of installing wellbore closures located on the seabed normally requires a lot of time when you have to install and remove

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the operations required for the Bohrlooh terminations are taken into account. When production sample information is obtained you usually follow a basic program, which can deviate from the following description, in which, however, for the "completion" on one or At other times the equipment and procedures set out below will be used.

The wellbore blowout casing is usually removably attached to the anchoring facility on the seabed and usually has a protection valve, that is, a valve around a pipe penetrating the valve creates a seal around it for each size of pipe to be introduced into or removed from the wellbore, in or around which uncontrolled flow from the borehole can occur} In addition, there is also a protective or blocking valve for completely closing off the borehole if there are no pipes extending through the protective valves, and one usually arranged at the top of the pipe additional Protective bag member provided, which seals around the drilling through * it or, if there are no continuous pipes above the borehole. The blowout protection tube also has a or several lying below the locking device

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Openings or passages so that circulation into or out of the borehole can be established when the protection valves are closed around the pipes passing through them. In "Seabed ¹¹ - pipe strings, there are also means for actuating the protective valves and the passages, to which" kill lines "are connected, from the sea surface, as well as means for anchoring and releasing to and from the permanent Platform or foundation standing on the seabed is planned

Usually there is also a conduit that extends from a fitting at the top of the blowout protection tube to the surface and receives the tubes passed through the Schuts valves. This drill ends with an open end a suitable piece below the drilling level and is connected to a T-piece at its upper end.

^w close a flushing return line provided. If there

Blow-out protection tube has a nominal bore diameter of 34-6 mm (nominal 13 5/8 bore) has the riser system for usually a slightly larger inside diameter than this tube. It can have as many pipe sections or connections than are required around the top of the blowout protection tube to reach, and can also be provided with means with the help of which it is from the upper end of the exhaust

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protection tube released, attached to this, led away from him and can be brought back to him again. These procedures have already been described and represent therefore do not form part of the invention; Rather, they are only to facilitate understanding of the installation and removal a line or riser pipe required process steps listed.

The riser pipe and the aforementioned blow-out protection pipe are located in the water below the drilling platform and are both anchored to the seabed and attached to the drilling platform with the help of appropriate devices, if the decision to obtain production sample information has been made. Besides is also usually the well casing over which the Production is to be taken, already used. If this pipe has not yet been set, it must of course done before the next step. Its upper end is in the lower part of the well closure system used, which is a permanent part of the foundation provided on the seabed. The to this Additional equipment needed at this point includes the tubing that is below the surface Control organs, the connection nozzles, borehole packers, etc., a production borehole separator located on the seabed

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conclusion, distributor next to the surface Production test equipment and safety controls.

The controls, packers and piping located below the surface are adjusted accordingly to take into account the movements of the Bolnteek platform set in the same way as for normal land drilling operations. At this point it has been customary the casing when the borehole closure is closed or clogged or head and / or closed piping either with or without perforated casing and opposite to set the pluids present in the borehole in an open arrangement. Allow at this point in the procedure embodiments of the invention allow for more effective use of subsurface equipment and a considerable saving of time compared to the previous operations, as follows will become clearer.

After setting the production pipe string in the casing hanger of the lower part of the well head or end, it has been customary to use the riser pipe and the blowout protection tube to pull out and the production wellhead located on the seabed along with its flow lines and to install control organs. For this was avenged

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borrowed labor and a variety of equipment, particularly remote-controlled equipment. In addition, from time to time divers had to be deployed under extremely dangerous conditions and at depths in which the human organism is stressed to the limits of its capabilities. After the borehole head or closure provided on the seabed together with the associated flow lines and control i

stanchions had been installed and the production trials had been carried out, the bore had to shut down the well completion removed and the Ausblasschutzrohr and the riser tube are replaced before a further closing of the well could be carried out _f to bring the drilling platform to a new drilling location.

The equipment according to the invention described below enables the built-in blow-out protection tube to be used at all times. and riser system while performing and maintaining production inspection operations the production control in the piping system at a close point located on the seabed without the use of a borehole closure intended for seabed production. Through the development of a sub-sea surface controlled from the sea surface

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The main valve eliminates the need for an entire lifting process of the protective discharge tube and the riser pipe from the seabed to the surface and back. In addition, this avoids an entire lifting process of the production well closure provided on the seabed. Due to the continuous use of the built-in to the seabed equipment an economic / operational is thus warrants _k. In addition, during production testing operations

a safety control equipment located below the surface of the sea uses which previously unavailable additional security measures for the Drillship guaranteed.

Furthermore, the constructions according to the invention make it possible the commissioning of the well during the production test and offer for the case of need, for example in the event of disturbances on the surface or the like, the possibility of) the control and production lines from the upper part of the main safety valve complete and pull it up to the surface of the sea. This then makes it easier to remove the Riser pipe and the control lines from the blow-out protection devices that are now in operation possible, whereupon the platform can be moved from the drilling site into safer waters while the well system is securely closed remains on the seabed, as it does when it is shut off

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a main valve on a land borehole. This feature, which is the exit from a hole and the Allowing return to this without shutting down the well means that this operation is much shorter Time can be carried out than was previously possible.

The objects, advantages and features of the invention will appear more clearly from the following description Embodiments of the invention with reference to the drawings. Show it

1 shows a schematic representation of a borehole installation with a flow line arrangement passed through it with the features of the invention,

Pig. 2 shows a schematic section for illustration of a central section of the conduit assembly installed in the wellbore, in an enlarged view Scale,

Pig. 3 a pig. 2 similar view showing a port setting by Pig. 2 and shows a portion of the assembly further below,

Pig. 4 a vertical partial longitudinal section through the upper one Section of the valve of the flow line assembly,

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Pig. 5 is a view similar to FIG. 4- showing porting same forms and a middle section of the valve illustrates

Pig. Fig. 6 is a view similar to and a continuation of Fig. 5 of the lower portion of the valve;

Fig. 4-A is a partial view of the valve, on an enlarged scale,

Fig. 4-B is a partial view of another portion of the valve, on a larger scale,

B'ig. 7 shows a partial section through a section of the valve, on a larger scale,

Pig. 7-A a section along the LLnLe 7-7 in Pig. 5,

B ¹ Lg. 8 a vertical section through the connection head of the flow line arrangement,

Pig. 9 is a section along the line 9-9 in FIG. 8, in enlarged scale,

10 is a partial side view of a in a channel of the Flow line arrangement anchable clamping dowels,

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11 shows a vertical partial section through the valve dee connection head8, on an enlarged scale,

Fig. 12 is a vertical partial section through a clamping mandrel and valve arrangement which can be connected to another channel of the connection head,

Fig. 15 is a vertical partial section through the guide and Connection head of the flow line arrangement, which is attached to a clamping mandrel of a large flow line attached guide illustrates

14 is a schematic, shown partially in section Representation of a modified embodiment a flow line arrangement according to the invention installed in a borehole system,

Fig. 14-A is a partial sectional view of one in the arrangement modified connection head used according to FIG. 14,

Fig.15. a vertical partial sectional view even further modified flow line arrangement according to the invention in a borehole rig,

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15-A shows a vertical partial section through the connection head of the arrangement according to FIG. 15 and,

16 shows a vertical partial section through a still further one modified flow line arrangement in a well system.

According to Fig. 1, a located on the bottom of a body of water Well rig 30 used while drilling the wellbore, a well casing 31 which attached to casing head 32 in a conventional manner, a stacking arrangement of those attached to the casing head Blow-out protection valves 33, one on the topmost blow-out protection valve attached clamping head 35 and a detachably connected to the upper end of the clamping head, extends to the water surface and an opening in a floating work platform 37 penetrating riser pipe 36 on. This well rig lays a longitudinal, uninterrupted channel 38 from above the surface of the water to the borehole through which a flow line arrangement 4-0 can extend, the near the bottom of the water can be supported by one of the blowout protection valves 33. These valves can be known from Construction and of any kind and can be done by divers by hand or, for example, hydraulically

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be remotely controlled, in the latter case corresponding fluid control lines from the valves to the Arbeitsplattfona would extend. Such blow-out protection valves have means for holding a flow conduit extending therethrough against movement and to create a seal between them and this line. The flow line arrangement has a drill string 44 extending to a desired depth in the borehole and including a not shown Find packers to close the annulus between the drill string and casing above one Earth formation is provided, a valve 45 for controlling the flow of fluid through the drill string and two concentric Lines 46 and 47, which have an annular channel 48 for the flow of control fluid to control the set their lower ends connected valve 45. The lower end of the inner conduit 47 is open when it is open Valve 45 with the drill string 44 in connection. the Flow line arrangement also points to the surface Lines 49 and 50 and a connection head 51 connected to the upper ends of the concentric lines on. The lower ends of the surface conduits 49 and 50 are releasably connected to the connection head 51, which is a connection between the larger surface line 49 and the inner line 47 on the one hand and the thinner one

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or control fluid line 50 and the annular channel 48 on the other hand manufactures.

If lines 4-9 and 50 are already in the duct 38 are to be connected below the water surface connection head, a guide 55 is on the larger Line 49 attached, which serves to properly align this line with respect to the connection head and also to bring itself into proper alignment on the connector head so that it is in the correct one Location is located around the lower end of the thinner line for connecting au dou connection head to this to lead.

After completion of the drilling operations, while the downhole rig 30 is still in place and if briefly Production tests are to be carried out, the pipe string from the floating work platform is in operation 37 is inserted into the wellbore using known conventional equipment, in turn the valve 45 is connected to the upper end of the tubing string, the concentric lines 46 and 47 at the upper end of the valve be connected, the connection head is connected to the concentric lines and, if desired, the stronger and thinner surface conduction detachable with the

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Connection head are connected while the tubing string is inserted through the channel 38 into its position in the wellbore will.

When the tubing string and the flow line assembly 4-0 are in the desired position in the borehole system, at least one blow-out protection valve is actuated, so that it engages the outer conduit 46 and prevents it from moving upward or downward in the wellbore 30 holds and also causes a seal between itself and the line. At the top of the stronger ones Line 49 becomes a surface control equipment 60 to the Control of the flow through this conduit and through the tubing string 44 and to facilitate introduction of downhole tools in and out of the stronger conduit 49.

The upper end of the control fluid bypass 50 and the annular channel 48 between the concentric lines is pressurized control fluid to control the valve 45 fed from a control distributor 61 via a line 62. Through the flow line arrangement and the Appropriate tools for perforating the borehole casing can be passed through the pipe string at the earth formation that has found it while cementing

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operations and the like. Using the flow line arrangement and the pipe string can be carried out. The valve 45 is closed and opened as required during these operations. *

Subsequently, the discovery of fluids originating from this earth formation and tapped through the borehole can be found can be examined by directing these fluids to the surface via the drill string. The valve can at any time by reducing the amount applied to it via manifold 61 Fluid pressure are closed.

If it should become necessary to remove the lines 49 and and the riser pipe 36 from the locking head, for example if there is a risk of storms at the drilling site, the valve 45 is closed, whereupon the lines 49 and 50, for example separated from the connection head by unscrewing. The riser pipe can also be released from the locking head will. The work platform itself can either be connected to Remain anchored in place or be removed before the storm hits. The pipe string, the valve, the concentric lines and the connection head are left in the borehole while being held by the blow-out protection valve. Since the water conditions at the bottom of the body of water are always calm with little or no wave effect

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there is little risk of damaging parts of the flow conduit assembly left in the borehole will. The valve 45 located below the blow-out protection valves closes off the upper side of the pipe string, if the riser pipe and lines 49 and 50 should be damaged or broken off from the connection and locking head, how this can happen when the platform collides with a watercraft or when there is a sudden storm or an unforeseen earthquake wave occurs. Since the locking head is built very strong, it will in all likelihood not broken away if the riser is severed or torn away in this way.

When the storm has subsided or when for other reasons it is desired to return to the drilling site and to connect lines 49 and 50 to the connection head for further or additional work at the drilling site To perform, the floating work platform is realigned over the wellbore termination assembly and the riser pipe 36 is connected to the locking head 35, with any water present in the termination arrangement is removed above the blow-out protection valve neck, for example by pumping. Then the guide 55 opens the lowest end of the stronger line 49 put on and drained through the riser pipe. The one big one

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Tubular member 64 and a thinner tubular member 65 having Guide only enables the line 49 to be connected to the connection head 51 when the guide is opposite the connection head is aligned so that the thinner line 50 is properly guided into the connection head. Afterward the thicker surface line is connected to the connection head, whereupon the thinner line goes through the riser is drained and passed through the guide 55 to the connection head, in turn releasably attached to this to become. Thereupon further work processes, such as further production studies, cementations and the like., Through the flow line arrangement and be made through the tubing.

The valve 45 has an elongated tubular mandrel 100 with an upper portion 101, which has an internally threaded portion 103, into which the lower end of the inner pipe 47 is screwed, and an internally threaded portion 102 is provided into which the lower end of the outer conduit 46 is screwed. The upper mandrel section is with a or several vertical, upward-opening longitudinal channels 105 provided, the lower ends of which extend through transverse bores 106 in an annular channel 107 between the mandrel and a Open the sleeve 109, the upper end of which is screwed onto the thinner lower end section 110 of the upper mandrel section

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is. The upper side of the bing channel 107 is through a Sealing arrangement 112 closed, which can have an O-sealing ring 113, which is attached to the outer surface 114- des upper mandrel sections below a downward one Single shoulder 115 of the same and on the inner surface 117 of Sleeve 109 engages above an upward shoulder 118. The seal assembly also has a Support ring 119 'whose downward movement is limited by its abutment on shoulder 118, two support rings 121 and 122 and a thrust ring 123, the upward movement of which is limited by its contact with the shoulder 115. The lower end of the bing channel is similarly through a sealing arrangement 125 closed, the O-sealing ring 126 on the outer surface 127 of the tubular mandrel and on the Inner surface 128 rests below an inner hanging shoulder 129 provided thereon. This sealing arrangement has an upper support ring 131, the upward movement of which is limited by its contact with the sleeve shoulder 129 is, two support rings 132 and 133 and a thrust ring 134, the downward movement by its contact with the upwardly directed end face or shoulder 135 of a seal assembly retaining member 136 screwed into the lower end of the sleeve.

The drill mandrel 100 has an upper cylinder portion 137,

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the upper brew of which is screwed onto the thinner lower end of the upper mandrel section 101, a connection section 138, the upper part of which is screwed into the lower part of the upper cylinder section 137, an upper one Operating section 139 * whose thinner upper part is screwed onto the thinner lower part of the connection section 138 is, a connection portion 140, the upper part of which is telescopic inserted into the upper operating section and into the lower end of the upper operating section 139 is screwed in, a lower cylinder section 141, the upper end of which is screwed onto the connection section 140 is, a terminal portion 142, the upper end of which is telescopic is inserted into the lower cylinder portion 141 and screwed to this, a lower actuating portion 143, the upper end of which on the thinner lower End of the connecting portion 142 is screwed, and a lower part or lower portion 144, which extends into the lower end portion of the lower actuating portion and is screwed to this. Everyone this tubular mandrel sections can with the help of adjusting screws 145 and 146, which extend over end slots of one section extend into a threaded hole in the other section, against rotation relative to the other, with it connected section. The tubing mandrel connection sections 138, 142 and the lower section 144

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are nit seal arrangements, each one in an outer recess or groove arranged O-sealing ring * 148 and a support ring 149, which a Sealing between the connection sections and the mandrel sections create in which they slide telescopically. The terminal portion 140 has a similar sealing arrangement provided, which creates a seal between it and the upper actuating portion 139, during the lower mandrel section provides a similar seal between it and the lower actuating section of the tubular mandrel having creating sealing arrangement.

In the lower actuating section 139 of the tubular mandrel is a Ball valve 150 mounted pivotably with the aid of pins 151, the outer sections of which are rigidly in section 139 provided transverse bores 152 are attached and the inner sections of which extend into slots provided in the ball 153 extend. By the contact of the pivot pins 151 with the spherical surfaces defining the slots, which Extend at an angle with respect to the central axis of the ball, the ball is capable of practically 90 °. between an open position in which their axial passage 155 is extends in the Eohrdorn longitudinal direction, and to rotate a closed position in which the axial passage 155 the ball extends transversely to the longitudinal axis of the horn, if

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the ball valve in the housing a predetermined distance upwards is moved. The movement of the ball valve between its lower open position and »an upper closed position takes place by an actuating arrangement 16O with a piston 161, a tubular piston member 162, the upper End connected to the piston, a tubular housing 163, an upper and a lower Hingsitz 164 or 165 above or below the ball and two interacting upper and lower locking rings 166 and 167, which hold the ball and seats in place against displacement out of the housing.

The tubular piston 161 has a tubular upper extension 171 (Fig. 4-A) extending into the upper Mandrel portion 101 extends and to which two sealing assemblies 175 are attached, which form a seal between the outer surfaces 173 and the inner surface 174 of the upper mandrel section. Any of these arrangements may have multiple pressure sensitive packing rings that, Make a seal in both the upward and downward directions as shown. The downward movement the upper seal assembly 175 is bounded by an upwardly directed end shoulder 176 of a retaining ring 177, its downward movement in turn by touching it inner downwardly directed ring shoulder 178 with the upper

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It is limited by several ling segments 182, the inner sections of which protrude into an annular recess 183 of the piston extension. The upward movement of the upper seal assembly 175 is provided by the lower annular shoulder 186 a Paokung retaining ring 185, which, for example, with the help of pins 187 »which are through corresponding Cross bores of the retaining ring extend into cross bores in the piston extension, at the upper end of the piston v ^ - extension can be attached. The upward movement of the lower packing assembly on the piston extension will prevented by a support ring 179, the upper annular surface of which on the annularly arranged lower surfaces the ring segments 182 rests, which extend beyond the boundaries of the bing recess 183 outwards. The downward movement of the lower packing assembly on the piston extension 171 is limited by the upwardly facing shoulder 180 of the piston extension 171.

At the lower end of the piston 161, below its outer annular flange 193, upper and lower packing or Seal assemblies 191 and 192 attached. The seal assembly 191 may have multiple Paokungsringe 194, one for Limiting the downward movement of the packing rings on the have upper ring shoulder 196 of flange 193 abutting support ring 195 and a retaining ring 198, which the

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Limited upward movement of the packing rings. The retaining ring is attached to the piston by means of pins 199, which through transverse openings in the retaining ring in provided in the piston Extend transverse bores into it. The lower seal assembly 192 can similarly include multiple packing rings 201 have, whose support ring has a downward gerichtett Ring shoulder 203 of the piston flange 193 touches to limit the upward movement of the packing rings on the piston The downward movement of the packing rings is controlled by a Retaining ring 205 limited, which penetrates with the help of transverse bores in the retaining ring and is located in transverse bores in the Piston extending pins 207 is attached to the piston.

The upper end of the tubular piston member 162 is telescopic inserted into the enlarged lower portion of the piston bore, moving its upward movement into the Piston in by touching its outer annular shoulder 211 with a downwardly directed inner shoulder 212 deß Piston is limited. The piston member is releasable against downward movement by a slotted snap ring 214 supported relative to the piston, the inner sections of the snap ring in an outer annular groove 215 of the tubular piston and its outer sections in an inner annular groove 216 ia Engage the piston.

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Referring to Fig. 6, the snap ring has an upward and an outward direction inclined cam surface 217, their contact with the annular shoulder 217a of the piston, which is the lower end of the groove 218, when the piston member is pressed downward relative to the piston, the snap ring compresses and itself can move inward into the Hingnut 215 of the piston member, so that the piston member for a downward movement relative is released to the piston. The snap ring also has an upper, outer, downwardly and outwardly sloping tapered shoulder 217b, whose rolling contact with the lower end surface of the piston 161 during the telescopic upward movement of the piston member in the piston allows the snap ring to resiliently enter into the hooking groove 215 of the piston member. The snap ring resiliently displaces outwardly into the piston hanging groove 216 as it comes into alignment therewith.

The piston and horn lay above the piston and below the lower annular end surface 219 of the upper Mandrel portion an annular piston chamber 216 fixed. Of the The hanging channel 107 communicates with the piston chamber 218 via one or more transverse openings 220 of the upper cylinder section 137.

The piston is in the upward direction by two springs 221

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and 222 preloaded that wrapped around the piston member and are arranged in an annular spring chamber 223 between piston member and cylinder section 137. The top End sections of the springs lie on downwardly directed hanging shoulders 224 and 225 of a spring retaining ring 227 on, which is rigidly attached to the piston member with the aid of a plurality of screws 228, the screws in transverse bores 229 are screwed into the spring retaining ring and their pin ends 230 are inserted into openings provided in the tubular member 231 extend. The lower ends of the springs bear against the upper annular shoulder 232 of the mandrel connection section 138.

During the up and down movement of the piston in the tubular mandrel fluid is capable of entering and exiting the spring chamber through a number of openings 233 in the piston member pour out.

The mandrel connection portion 138 is with an inner, self provided downwardly opening annular recess 235, in the one Sealing arrangement 236 is used, which below the openings 233 a seal between the connecting portion and the tubular piston member. The upward movement of the seal assembly consisting of several Packing rings 237 can be made up by a downward directed annular shoulder 238 of the mandrel connection section

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limited while their downward movement by a seal retainer ring 240, which is screwed into the lower extended Zndabechnitt of the connection section a. A O-ring 241 creates a seal between the retaining nut or ring and the mandrel connection section. The sealing arrangement 236 prevents in the closed position of the ball valve 150 an upward into the spring clip and then inward Fluichnfluß taking place in the tubular piston member.

According to FIG. 5, the tubular housing 163 has an upper one Ring section 245, which is fitted telescopically onto the thinner lower section 246 of the tubular piston 162 and is rigidly attached to this, for example by means of a weld seam 247, to form a seal. The upper ring seat 164 is located in a downwardly directed annular recess 250 of the housing and its upward movement in the case is caused by the contact of its upper shoulder with an inner, downward-facing one Shoulder 252 limited. One in an upper outer recess The O-Bing 253 inserted into the seat creates a seal between, the upper ring seat and the housing. The upper ring seat can consist of a circular seat ring 255 have a hard surface and a low friction ensuring material between its

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inner, circular domed surface 256 and the outer Spherical surface of the ball 150 is used. The seat ring can be glued or otherwise attached to the seat. *

The housing has a plurality of downwardly projecting, resilient clamping fingers 260 (FIGS. 5 and 7), which extend under the Sphere 150 extend and are provided at their lower ends with inwardly projecting lugs 261, the lower Sections engage an inner, upwardly directed recess 262, which through the retaining rings and 167 is set. The outward movement of the clamping fingers is caused by the contact with the outer surfaces of the lugs 261 with an inner annular shoulder 263 of an upwardly extending annular locking flange 266 of the lower locking ring 167 limited. The upward movement of the clamping fingers relative to the upper locking ring is made by contacting the upper shoulders 267 of their inner lugs with a downwardly directed annular shoulder 268 limited, which is determined by the outer annular flange 269 of the upper locking ring.

The two locking rings are attached to each other with the help of several countersunk screws 270, which are located in the lower Circlip provided openings upwards downwards

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outward opening tapped holes 271 in the upper circlip extend. Between the heads of the countersunk screws and downwardly directed shoulders 274, which go down through them opening holes 275 in the lower, the heads of the countersunk screws Retaining retaining ring are formed, retaining washers 272 are inserted.

The downward movement of the lower ring seat 165 is through Contact of its lower sides 278 with the upper side 279 of the upper locking ring 166 is limited. According to Pig. 7th the lower ring seat has an inner, upwardly directed, annular, domed surface 280 to which is adhered or otherwise a seat ring 281 of a low friction material is attached, which the outer dome surface of the ball 150 touches. The lower ring seat 165 is down through a number of itself springs 284 which open, circumferentially spaced apart bores 285 of the lower ring seat biased upward into contact with the ball. The upper ends of the springs rest on a downward facing surface 286, which defines the upper end of the bore, while its lower ends define the top 279 of the upper locking ring touch. Upper and lower locking rings are provided with pins 288 (FIG. 7), the inner portions of which are set in cross bores in the circlips

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and the outer portions thereof extend outwardly into the longitudinal slots 289 between the clamping fingers and the latter touch relative to rotation of the locking rings to prevent housing 163. The pivot pins 151 also extend over two of the longitudinal slots 289 into the recesses of the ball. Obviously the upper and lower ring seats, ball, and upper retaining ring 166 can move upward between the clamping fingers are inserted into the housing 163 with the lower ends of the clamping fingers yielding outward and allow this upward movement of the components to then spring inward when the upper inner shoulders 267 their lugs 261 get under the lower shoulder 269 of the flange 269 of the upper locking ring. The lower The locking ring is then pushed upwards so that its locking flange or shoulder 263 telescopically reaches the lower ends of the clamping finger lugs and is attached to the upper locking ring with the help of the countersunk screws 270 attached so that the clamping fingers are secured against outward movement.

The downward movement of the piston 162 and housing will by the contact of the downward shoulder 289 of the lower locking ring 167 with the inner, upward directed shoulder 290 of the mandrel connection portion 140 limited.

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The lower ball 150a (FIG. 6) and its operationally and structurally assigned parts are similar in structure and mode of operation to the ball 150 and its operationally and structurally assigned parts, which is why the parts assigned to the lower ball have the same reference numerals as the corresponding upper ones Ball 150 associated parts plus an appended ⁿ a ^{tt are} designated. The fluid is able to flow between the annular channel 107 and the piston chamber 218a above the piston 161a via openings 220a in the lower mandrel cylinder section 141. The downward movement of the piston 162a is limited by the contact of the shoulder 289a of the lower locking ring with the shoulder 293 of the mandrel lower parts 14-4. The upward force exerted on piston 162 by springs 221 and 222 and the upward force exerted on piston 162a by springs 221a and 222a are greater than the static fluid pressure in line 46 and in channel 48 between lines 46 and 47, so that these pistons move upward and rotate the balls to the closed position when the fluid present in the thinner surface conduit is not kept under pressure.

If the two ball valves are to be opened during operation, the fluid pressure prevailing in the annular channel 107 is increased for example by conveying via the control distributor 61

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increases, and when the fluid pressure in the piston chambers 218 and 218a exerted on the pistons 161 and 161a, respectively downward force means the total upward force exerted on the pistons by springs 221, 222 and 221a, 222a, any upwardly acting pressure differences over the balls and their pistons as well as the whole exceeds the frictional resistance in the system resulting from these forces, the pistons begin to move to move downwards. If the fluid continues to be conveyed via the distributor 61, the pistons continue to move downwards until them by touching the shoulders 289 and 289a of the lower retaining rings 167 and 167a with the respective upwards directed shoulders 290 and 29Oa of the mandrel sections 140 and 144 are stopped. More pluidum funding over the distributor 61 causes an instantaneous increase in pressure of the fluids being conveyed, which at one in the fluid diversion 62 pressure gauge switched on on the surface can be read. The on the pistons 161 and 161 a required pressure is about $ 10 greater than any one Closure of the ball valves causing borehole pluidum pressure. During the downward movement of the pistons over their limited movement paths twist the balls 150 and 150a over practically 90 ° from their closed position, in which their axial passages 155 and 155a, respectively, out of alignment on the axial channels of the housing, the tubular piston

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limbs, the piston and the mandrel are in a position, in which these axial passages are aligned with these axial channels or are aligned with them and a fluid flow allow through the valve.

If the pressure prevailing in the annular channel 107 is lowered below the value at which its force affects the pistons in theirs holds the lower position, shifts the force of the springs and any upward differential pressure that may be present Above the piston and balls both the piston and the balls in the earthorn go up, so that the balls turn around practically turn 90 into the positions in which their axial passages 155 and 155a extend transversely to the longitudinal axis of the tubular mandrel and contact their outer surfaces with the seat rings 255 or 255a prevents a further upward flow of fluid through the tubular mandrel.

The upward movement of pistons 161 and 162 is controlled by the Contact of the shoulders 294 and 294a of the housing parts 163 and 163a with the shoulders 295 and 295a of the seal retaining rings 240 or 240a limited. Any upward differential pressure across the balls will now seek to achieve the To keep balls in seal contact with their seat rings. During the upward and downward movement of the balls guide the upper and lower ring seats 164, 164a and 166, 166a of the two valve balls their rotational movement.

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When the yentil balls are in their closing positions, they can either by increasing the pressure in the annular channel 107 in the manner described above or by Pressure increase in the inner 'drill string 47 in the open position are moved, for example, by pluidum from the surface in the channel 160 above the upper ball 150 is being pumped · When the pressure in the inner pipe string has increased to such a level that its over the upper one Ball 150 and the upper piston 161 acting the force Force of the upward acting differential pressure over the ball 150, the springs 221 and 222 as well as the Exceeds snap ring 214, the ball valve is pushed downwards and pulls the piston member 162 with it, wherein the rolling contact of the outer lower cam surface 217 of the snap ring with the lower annular shoulder 217a of the Piston displaces the snap ring 215 inwardly into the annular groove 218, causing this downward movement of the piston member compared to the piston is made possible. The piston is held against a downward movement because the in the Piston chamber 218 prevailing pressure is now significantly lower than the pressure below the piston. If more Pluidum is pumped into the inner conduit 47, the ball 150 shifts downwards and at the same time becomes at least partially rotated into the open position, so that positive pressure in the channel i60a above the lower ball 150a

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can occur. The ball 150a and the piston member 162a are then moved downward relative to piston 160a, ball 130a moving into at least partially open Twisted position. As soon as the two ball valves are at least partially open, Pluidum can pass through the valve and in the with the lower end of the mandrel lower part 14-4 connected drill string 44 are promoted.

When the fluid circulation is interrupted and the pressure is thereby equalized via the ball valves, they move Springs 221a and 222a, the piston portion 161a and the ball 150a upwards, while the springs 221 and 222 move the piston member 162 and the ball 150 upwards into the positions according to FIG 4, 5 and 6 push back. When the snap rings 214 and 214a are in alignment with the inner ring grooves 216 or 216a of the associated piston 161 or 161a, they spring into these grooves and hold the piston members releasably attached to the piston in question. The contact of the upper curve shoulders of the snap rings with the The lower end shoulders of the pistons naturally cause the snap rings to roll inward into the inner ring grooves 21.5 or 215a to enable such a telescopic upward movement of the upper end sections the piston members into the piston.

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" ⁵⁶ " U83776

Evidently, the two valve balls with longitudinal spacing from one another if one of the balls is not working properly in the valve-Ro hrdorn incorporated j and not echliee · sen soltfce, if required, 'still includes the other ball. The valve according to the invention can therefore always be used when it is important to interrupt a flow through a line if necessary, as is the case, for example, in borehole systems, in which a non-closing valve results in costly damage and damage when a certain condition occurs may have.

It can also be seen that both ball valves will go through actuates a common control fluid pressure, wherein the by the springs 221 and 222 exerted on the two pistons pressures are preferably equal so that both Attempt to open ball valves when the pressure prevailing in the annular channel 107 has reached a first predetermined value increases and close when this pressure drops below a predetermined value.

In addition, the valve is as economical and as possible compactly constructed, although it is provided with two separate devices for closing the valve, through which ensures an extremely high operational reliability of the valve.

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According to Tig. 8, the connection head 51 has a tubular shape Terminal housing 301, the upper end of which into the enlarged lower section 302 of the central passage 303 a clamping head 304 is screwed in. The clamping head in turn has an inner annular flange 305, the one downwardly directed annular stop shoulder 306, a lower, upwardly and inwardly extending annular Guide or curve shoulder 307 and an upper, upwardly and outwardly extending annular stop shoulder 308 specifies. The lower end of the clamp housing is in the enlarged upper section 309 of a tubular connection lower part 310 screwed in. A tubular clamp holder 312 is secured against longitudinal movement in the clamp housing, its lower end is screwed into a holding sleeve 314, the lower, outer annular flange 315 below the annular lower end shoulder'316 of the clamp housing and is disposed over upwardly directed shoulder 317 of the connector base. The clamp holder is on its upper end is provided with an outer annular flange 319, which a plurality of circumferentially distributed at intervals, having upwardly opening grooves 320. The upper end of the outer clamp holder flange is beveled or inclined upwards and inwards.

In the terminal housing opposite this is limited in longitudinal

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Movable direction a clamping member or snapper 325 installed, which has a base ring 326 and several resilient clamping fingers 328 distributed at intervals in the circumferential direction, which are made of the same material with the base and in the grooves 320 in the outer flange 319 of the clamp holder reach in. Each of these clamping fingers is provided with an inwardly directed, longitudinal extension 330, which has thread-like teeth 331. These teeth have base surfaces 332 that are practically horizontal or vertical. extend perpendicular to the longitudinal axis of the clamp housing and with inwardly directed upper shoulders or surfaces are provided. The downward movement of the clamping member 325 is achieved by contacting the lower end surface of its base ring 326 with the upper annular surface or shoulder 335 of the retaining sleeve 314 is limited. The upper ends of the clamp fingers are at a distance below the curved shoulder 3o7 of the clamping head when the clamping member 325 is in its lowest Position. When the clamp head moves up in the clamp housing, they move up and in directed upper outer curved shoulders 337 of the clamping fingers in contact with the curved shoulder 307, wherein this rolling contact between shoulders 337 and 307 results in an inward displacement of the upper ends of the clamp fingers has the consequence. In the connection lower part, a sealing arrangement 340 is provided, which consists of several between one

- 39 -909839/04 3 6

~ ³⁹ ' H83778

upper and a lower support ring 342 and 343 located packing s rings 341 may exist. The upward movement the sealing arrangement is made by contacting the top of the upper support ring with the lower end surface of the retaining sleeve 314 limited while their downward movement by touch of the lower support rings is limited by an upwardly directed annular shoulder 344 of the connection lower part. The lower connection part 310 is provided with an inner hanging flange 346, the upper and lower stop shoulders 347 or 348. The upper end of the inner concentric conduit 47 is in the thinner, internally threaded Screwed in section 349 of the bore of the connection lower part, while the outer concentric line 46 in the lower further internal thread section 35o of the connection lower part is screwed in. The connection lower part has a transverse bore or opening 353, which has a Shoulder 351 at the upper end of the annular channel 48 between the two concentric lines in the bore of the connection lower part joins.

With the lower end of the stronger line 49 is a clamping mandrel 360 connected, which is connected to this line via internal threads provided in its upper end and the lower end portion of which forms. The lower end portion of the mandrel is telescopic through in the downward direction

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the central passage 303 of the clamping head 304 into the Clamp housing insertable and is provided with external thread 362, which with the thread teeth 331 of the clamping fingers in Can be brought into engagement. The upper flanks 363 run practically perpendicular to the longitudinal axis and the lower planks 364 extend upward and outward. If the lower If the end of the clamping mandrel is inserted through the central passage 303 of the clamping head, the thinner one moves Section 365 of the clamping mandrel past the clamping finger teeth, whereupon the lower planks 364 of the mandrel threads on the upper surfaces 333 of the teeth 331 of the clamping fingers attack and push the upper ends of the clamping fingers outwards and thereby a further downward movement of the Cleramthorn enable. When the telescopic downward movement of the clamping mandrel by touching its annular stop shoulder 367 with the upper stop shoulder 308 of the clamping head is prevented, the clamping mandrel thread stands 362 in screw engagement with the teeth 331 of the clamping fingers, wherein the sealing arrangement 340 contacts the thinner section 365 of the clamping mandrel and between the connection base 310 and clamping mandrel 360 causes a seal. Because of the presence of the practically horizontal lower ones or bases 332 of the clamping finger teeth and the like formed upper planks 363 of the clamping mandrel thread 362 cannot cause any relative movements that are not caused by turning

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take place between the clamping mandrel and the clamping member. Any upward movement of the mandrel now has result in an upward movement of the clamping member 325; if the curve shoulders 337 of the clamping fingers here on the attack inner curve shoulder 307 of the clamping head, this rolling movement urges the upper ends of the clamping fingers inward and prevents separation of the clamping mandrel from the clamping head, which can only be achieved by rotating the clamping mandrel relative to the clamping head and thus to the clamping member 325 is possible, which by the clamp holder 312, in the grooves 320 the extending inner lugs 330 of the clamping fingers, is locked against rotation.

The clamping head 304 has a vertical bore 370 which is radially spaced from its longitudinal axis and in which an elongated housing 371 having an upper clamping portion 372, a central connecting portion 373 and a valve housing portion 374 · is rigidly attached. The connection section has one in the lower side of the clamping section 372 screwed upper portion 376 and an outer central flange 378, the downwardly directed annular shoulder 379 contacts an inner, upwardly directed annular shoulder 380, thereby causing the downward movement of the connecting portion is limited in the bore 370. The connection section has an externally threaded central section

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Section 382 which is fastened to an internally threaded section 383 of the clamping head 304 below its shoulder 380

A clamp holder 312a and a clamp member 325a built into the elongated housing are different in terms of construction and operation the clamping holder 312 or the clamping member 325 similar and therefore with the same reference numerals as the corresponding Parts of the clamp holder 312 or of the clamp member 325 are designated plus an appended letter "a". The downward movement of the clamping member 325a in the housing section 372 is made by contacting its base ring 326a with the upper end face or shoulder 385 of the housing connection section 373 limited. The lower, externally threaded end portion of the clamp holder 312a is in the expanded upper, threaded portion of the central bore or channel 388 of the connecting portion screwed in. The upward movement of the clamping member 325a is caused by contacting the curved shoulders 337a of its clamping fingers 328a with the upwardly and inwardly extending annular curved shoulder 307a of the upper clamping portion 372 limited. The connection section has an inner annular flange 390 which has an upper stop shoulder 391 and a downward stop shoulder 392 defines.

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In the central bore 388 of the housing connection section is arranged below the flange 302, a sealing arrangement 394, which consists of several between an upper and packing rings 395 arranged in a lower support ring 396 or 397, respectively. The upward movement of the The sealing arrangement is created by the contact of the upper support ring with the stop shoulder 392 and the downward movement is limited by the contact of the lower support ring with a retaining ring 398, the upward movement of which in the central bore 388 in turn by touching its top is limited with a downwardly directed annular shoulder 399 of the connection section. The top end face of the Valve housing section 374, which in the lower section 400 of the connection section is screwed in, limits downward movement of the retaining ring 398. The valve housing section 374 is provided in its upper end portion with an outer recess or groove into which a a seal between the valve and the connecting portion creating O-ring 401 is inserted.

In the valve housing section is a valve 402 for controlling the fluid flow through the channel 388 and thus installed through the housing 371, this valve having an elongated tubular body 4o4, which by a around it wrapped spring 405 preloaded in the closed position

-U-909839/0436

t i ,.

H83776

is. The lower end portion of the spring rests on a lower, upward shoulder or surface 406 of the valve housing portion 374, while its upper end on the lower annular shoulder of an outer annular flange 408 of the valve body is applied.

The valve body has an upper thinner, externally threaded end portion 410 on which the the lower end portion of a check valve housing 411 is screwed on. One in an outer annular groove of the valve body The inserted O-ring 413 creates a seal between the check valve housing and the valve body. A check valve 412 built into the housing is in downward contact with by a spring 415 an annular seat surface 414 of the valve body. The check valve stem 416 extends up through the check valve housing and penetrates an opening provided in its top. the The spring rests on an upwardly directed annular shoulder of the check valve and on a downwardly directed shoulder of the check valve housing. In its lower closed position, the check valve is in contact with the seat surface 414 and prevents a flow from the transverse openings 417 of the check valve housing into the central channel 418 of the valve body above

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of the transverse openings 4-19 »which communicate with the channel 418 and pass through the flange 408. The contact of the top of the flange 4CB with the retaining ring 398 is limited an upward movement of the valve body in the housing. if when the valve 402 is in its upper position in the valve body, the sealing arrangement 394 is in sealing contact with the check valve housing 411 and hereby closes the housing channel in order to prevent a Fluid flow through this.

The downwardly opening opening or passage 422 in the lower part of the valve housing section 374 is above a Line 424 in connection with the opening 353 of the connection lower part 310, whereby the two ends of the line are fastened with the aid of corresponding connections 425 and 426 takes place, which are screwed into the outer threaded sections of the openings 422 and 353, respectively. When the check valve 412 is in its upper position, it will of course allow upward fluid flow from the central channel 418, when the pressure prevailing in the housing section below the sealing arrangement increases so much, that it allows the fluid to escape from the housing and thus from the annular channel 48.

A mandrel valve assembly 430, which is connected via a connection

909839/0436 - 46 -

U83776

run 4-31 with the lower end of the thinner surface lead 50 is connectable, is telescopically movable downwardly into the upper end of the housing 371 .and has a with external thread 433 provided clamping mandrel 432, the lower, upwardly and outwardly inclined surfaces 434 with the upper, downwardly and inwardly inclined surfaces or shoulders 333a of the teeth 331a are able to come into contact and displace resilient clamping fingers 328a outwardly to cause downward movement of the thread relative to the teeth to allow, and its practically horizontally extending shoulders 435 with the practically horizontally extending lower shoulders or undersides 332a of teeth 331a are able to engage in an upward movement to prevent the clamping mandrel relative to the clamping member 325a. During the downward movement of the thread 433 on them past the upper ends of the clamping fingers 328a become resilient displaced outwards and then displace resiliently inwards in order to prevent a non-rotating movement Upward movement of assembly 430 with threads 433 in Intervention to arrive.

A valve housing 438 screwed onto the lower, thinner end portion 439 of the clamping mandrel 432 has a thinner one lower portion 441 that mates with seal assembly 394 and a downward stop shoulder 440 in FIG

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U83776

Able to come into contact, which with the stop shoulder 391 of the flange 390 of the connection section 373 in Touch can be brought to the downward movement of the Limiting mandrel valve assembly in housing 371. A Valve 4-42, which is slidably inserted into the valve housing 438, has an outer annular groove in which an O-ring 444 is arranged which is able to come into sealing contact with the inner sealing surface 445 of the valve housing 438 when the valve is in its lower closed position, in which its downward movement by touching its downwardly directed annular shoulder 447 with an inner, upwardly directed annular shoulder 448 of the valve housing 438 is limited. The valve is preloaded into its lower position by a spring 449 whose lower End on the upper annular shoulder of an outer annular flange 451 of the valve and its upper end on a downwardly directed annular end face or shoulder 452 of the clamping mandrel 432 rests. The spring extends around a tubular upper extension 454 of the valve. The flange 451 has longitudinal soles 455 and the tubular Extension is provided with transverse openings 456, which open into the longitudinal slots, in order to be able to withstand the standing in the open position Valve to facilitate fluid flow through the valve housing.

- 48 -

9098 39 / 0-4.3 6 ",

U83776

The valve has a downwardly extending thinner rod portion 458, the lower end of which is in contact with the upper end of the shaft 4-16 of the check valve .412 can reach when the tubular body 404 telescopes into the elongated housing 571 in a downward direction and after the thinner lower end portion 439 of the valve housing is in sealing contact with at least the has moved the upper portion of the seal assembly 394 so that very little of the fluid which is in the channel 388 of elongated housing 371 above the check valve housing 411 can be present, can flow downward. Since the spring 449 is weaker than the spring 405 biasing the valve 402 upward, the valve 442 will be upwardly to its open position moved before the lower end face of the valve housing 438 contacts the top of the backsole valve housing 411, to allow upward flow of fluid which is in passage 388 between the lower end of the valve housing 438 and check valve housing 411 should be included can.

The further and the thinner vertical tubular member 64 and 65 of the guide 55 are shown in FIG. 13 through a base plate 481, an intermediate plate. 482 and a top plate 483 rigidly connected to one another. The further pipe section is interspersed with

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aligned openings 485, 486 and 487 of the plates, with the lower end portion of the further tubular member extends under the lower bottom plate 481 and with its upper side in a plane with the inclined upper one Plate lies. The thinner tubular member 65 also passes through aligned openings 459, 460 and 461 of the three Panels, its underside with the underside of the lower floor panel and its top with the top of the inclined top plate completes.

Vertical plates 464 and 465 extend between the top and bottom plates of the two tubular members radially outwards, while vertical plates 466 and 467, the lower edges of which rest on the bottom plate, also from the two pipe members go off radially outwards. These components of the guide are attached to one another by welding.

The guide is with the help of one or more in cross bores 471 of the further tubular member 64 screwed-in pins or stud bolts 470 can be releasably fastened to the clamping mandrel, whose inner sections in an outer annular recess 474 of the Ability to engage clamping mandrel 360. The mandrel 360 also has two perpendicular outer slots 375, in which the pins are able to engage and which are

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open up to ring recess 474.

The upward movement of the guide on the clamping mandrel is caused by Contact of the pins with upward facing surfaces 477 of the clamping mandrel, which define the lower ends of the slots, during the downward movement of the guide is limited on the mandrel by the contact of the pins with a downwardly directed annular shoulder 478, which the upper end of the mandrel recess 474 defines.

If the further or stronger line 49 with the connection head 51 is to be connected, which is already in the clamping head 55 of the well system 30 is used, the Clamping mandrel 360 attached to the lower end of the further line and inserted into the further tubular member 64 of the inner guide, whereupon the studs 470 are rotated to their inner sections into the annular recess 474 of the outer concentric line 46 move in. The guide is then carried by the clamping mandrel, while the other line is lowered downward through the riser pipe 36. The leadership now holds the further management in Riser centered so that it is perpendicular to the channel of clamp head 304. If the thinner Tube member 65 of the guide does not properly fit onto the upper clamping portion 372 of the elongated housing 371 of the connection

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head is aligned, the downward movement of the guide is interrupted by the contact of the upper end shoulder of the elongated housing with the base plate 481. derführung. The further line and the clamping mandrel can then be moved further downwards relative to the guide and the connection head until the pins 472 abut the upper shoulder 478 of the clamping mandrel. At this point in time, the clamping mandrel is in the position shown in FIG. The further line is then raised and rotated until the pins 472 engage the upper ends of the slots 475 provided in the clamping mandrel. Rotation of the further tube is then continued until the thinner tubular member of the guide, now carried by the clamping section 472, moves into perpendicular alignment with the clamping section, after which the guide moves downward under the influence of gravity until it moves downward through contact with the lower one End face of the further tubular member with the top of the clamping head 304 or by contacting the pins 470 with the clamping mandrel shoulder 478 is interrupted. The clamping mandrel can then downwardly through the central passage 303 to move down, its thread 362 ze in engagement with the teeth 351 of the finger 330 Ansät

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of the clamping member 325 is able to reach. The downward movement of the clamping mandrel and thus the further line 49 is then by touching the mandrel shoulder 367 with the shoulder 308 of the clamping head 304 interrupted. .

As can be seen, the guide consequently serves both to align the clamping mandrel and the further line the passage 303 of the clamping head 304 of the connection head as well as for proper alignment of the thinner pipe member 65 of the guide on the elongated housing 372 of the connection kc ^ f it, so that when the with the lower end of the The mandrel valve assembly 430 connected to the thinner conduit 50 is then lowered through the riser pipe inclined plate 62 the lower end of the mandrel valve assembly into the upper end of the thinner tubular member 65 and thus in alignment with the upper end of the upper clamp section the elongated housing 375 leads. The mandrel valve assembly then telescopes into the upper one End of the elongated housing in and is ah this by the engagement of the thread 434 with the teeth 331a of his Clamping member 325a attached. As valve housing 438 moves down through channel 388, the lower one comes End of its valve rod 458 in contact with the upper end of the stem 416 of the check valve and becomes the Valve 442 brought to its open position while the

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Valve housing continues its downward movement. The lower The end of the valve housing then comes into contact with the upper end of the check valve housing, whereupon the further downward movement of the valve housing a downward movement of the valve 4-02 against the resistance of the spring 405. If the back se hl agv en tilge home except Moving seal contact with the seal assembly 394, the thinner end portion 443 of the valve housing comes in Contact with the sealing arrangement. Now a connection between the lower end of the channel 388 and the central longitudinal channel of the clamping mandrel and the valve housing 438 made.

This downward movement of the mandrel valve assembly 430 continues until the shoulder 440 of the valve housing 438 the inner shoulder 347 of the connection lower part touched. At this point the thread 433 of the mandrel is fully engaged with the teeth 331a of the Clamping member 325a, this engagement between the clamping mandrel thread and the clamping member teeth now not one by turning the upward movement of the clamping mandrel the elongated housing 372 prevented. The clamping mandrel can then only be separated by turning it around its thread unscrew from the thread-like teeth of the clamping fingers of the clamping member 325a.

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U83776

In operation, after the drilling of the borehole and with the borehole system 30 still in use, which during the drilling process itself was used, including the blow-out protection valves 33 of the pipe string provided for the drilling process 44 and drained through the riser pipe 36 and the clamping head 35 into the borehole system 30. At the Draining the tubing string into the plant is the upper end of the tubing string into the lower threaded section 294 of the Lower part 144 of the dome 100 of the valve 45 screwed, while the lower ends of the inner and outer concentric Lines 47 and 46 are screwed into the sections 103 and the upper part 101 of the mandrel while their upper ends into the internal thread sections 349 and 350 of the lower connection part 310 of the connection head 51 is screwed in will. The further line 49 is then releasable by the clamping mandrel 360, which at its lower End attached, connected to the connection head; similar is the thinner or control fluid bypass 50 by means of the mandrel valve assembly 430, which via the terminal guide 431 is connected at its lower end, attached to the terminal head. A suitable fluid, like light oil, is in the channel 105 of the valve 45, the annular channel 48 defined by the concentric lines, the tube 425 and the thinner conduit 50 are introduced while these parts are being connected together. This arrangement

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Connection from drill string 44, valve 45, concentric lines 46 and 47 »connection head 51 as well as further and narrower line 49 and 50 is "drained" into a position in which the outer recess or groove 500 of the outer concentric discharge protection valves is aligned. Such a tric line 46 to one of the blowout protection valve 33a can be of any type and, for example, from that on pages 1134-1140 of the Composite Catalog of Oil Field Equipment and Services, 1964/65, published by World Oil, Houston, Texas / USA, which has two pistons 501 and 502 which can be moved relative to one another and are each provided with flexible sealing members 503 « The pistons are capable of the upper and lower shoulders 504 and 505 of the outer ones defining the recess 500 touch concentric conduit 46 when brought into operative engagement with the outer conduit, so that they prevent both upward and downward movement of the outer concentric conduit 46. Others of the blow-out protection valves 33, such as the blow-out protection valves 33b, can be obtained from the on pages 2575-2579 of the aforementioned Composite Catalog be the type shown and have a constricting piston 510, which is an annular Sealing member or packing 511 in sealing contact with a flow line, such as the outer line 46, urges and in the process creates a seal on this line and closes the annular channel 38. This blow-out protection

90 9839 / (H 36 - 56 -

H83776

valves are now operated to close the Hingkanal 38 and also the outer line against a To hold the longitudinal movement.

Any desired production test or sample can now be used using the rig 30 previously used to drill the borehole. For example, can various downhole tools are drained through the further line 49 after the valve 45 by metering the pressure of the control fluid with the aid of the

Distributor 61 and the line 62 connected to the upper end of the control pressure line 50 has been opened. the The throughput rate and the throughput volume of the borehole fluids through the perforations provided in the housing can then can be tested by allowing the fluids to flow through the tubing string to the surface. If it is Proves to be desirable or necessary, fluids such as cement, acid or the like., Through the pipe string into the To promote wellbore, the balls of the ball valves can be released by maintaining proper fluid pressure from the Manifold 61 to valve 45 are held in the open position; alternatively, if such pressure is not available, fluid may descend in the manner previously described be pumped through the further line into the passage 160 of the ball valve 45.

909839/0436 -57-

U837.76

If it becomes desirable or necessary, the pipes 49 and 50 from the connection head and the riser pipe 36 from the clamping head 35 to separate, for example in the event of a strong storm before completion of the desired work processes, the pressure manifold is actuated to release the pressure applied to the thinner line 50 so that the valve 45 closes. Then the further line 49 is rotated so that the thread 362 of the associated Clamping mandrel 360 from the thread-like teeth 331 of the clamping member 325 of the connection head releases, whereupon the thinner line 50 is rotated in a similar manner to the To bring thread 433 of their clamping mandrel 432 out of engagement with the teeth 331a of the clamping member 325a. While the pinch valve assembly 430 located at the lower end of the thinner line from the elongated housing 371 of the connection head is moved upward, the valve body 404 shifts upward to the closed position, so that no Salt water can enter it. As soon as the two lines 49 and 50 have been removed from the well system the riser pipe can also be released from the clamping head 35.

The drill string 44 is thus passed through the anti-blowout valves retained in the borehole. The valve prevents any water ingress into the pipe string as well as a

809839/0438

H83778

Outflow of borehole fluids from the tubing string.

If the two surface lines are then to be reconnected to the connection head in order to avoid the interrupted To resume work or to initiate other work processes, the clamping head 560 is activated by the further tubular member 64 of the guide 55 passed, whereupon the pin screw en 4-70 are rotated to their inner end portions to engage in the annular recess 474- formed in the clamping mandrel 360. This pen will screw you up preferably inserted into the slots 475 in such a way that the guide during the abiaasens of the clamping mandrel and the further line 49 is held in its lowest position on the mandrel. The guide 55 holds the further surface line during its lowering through the riser pipe 36 within the latter in a centered position opposite the connection head and holds the clamping mandrel in a position in which its lower end is on the passage 303 of the connection head 51 is aligned and is able to enter this. If the thinner ear member 65 does not is aligned with the upper clamping portion 372 of the elongated housing 371 of the connection head 51, the Bottom plate 451 of the guide the top of the clamp, whereby the downward movement of the guide is now stopped. Another downward movement of the further line and

909839/043 * ⁵⁹ "

U83776

The clamping mandrel 560 then has the consequence that the lower thinner portion 365 of the mandrel into the passage 303 of the clamping head 304 of the Ansohlußkopfes 351 occurs. Thereupon terminates the contact of the studs 470 with the das the upper end of the recess 474 defining the upper shoulder 478 of the clamping mandrel, the further downward movement of the clamping mandrel, before its thread 362 enters the passage 303 and engages the thread-like teeth 331 of the clamping fingers of the clamping member 325 arrives. An upwardly directed force then exerted on the further line this line will now move upwards relative to the guide. With the upward movement the further line becomes rotated the inner ends of the studs into the top To allow ends of the slots 475 to enter. Once the studs have engaged the slots, one has Rotation of the further surface conduit also results in a rotation of the guide, and while the guide is rotated and its thinner tubular member 65 moves over and aligns with elongated housing 371, the guide is no longer supported by this elongated housing, but falls down, with the thinner tubular member 65 reaches over the upper clamping portion 372 telescopically. The guide is then by touching the lower end shoulder of its further tubular member 64 with the clamping head 304 worn by this or can be carried by touching the inner

909839/0436 " ⁶ °"

483776

ends of the stud screws 4-70 with the lower ends of the Slots 475 defining shoulder 477 of the clamp head 304 are carried by this clamping mandrel 360.

The further conduit is then drained and the threads 362 of the larger mandrel engages brought the teeth 331 of the clamping member 325, so that the further line and the clamping mandrel to prevent a not rigidly with the upward movement taking place by turning are connected to the clamping head. At this moment the guide rests as a result of the touch of the lower shoulders of the another tubular member 64 with the clamping head on the clamping head 304.

The mandrel valve assembly 430 is then connected to the lower Connected to the end of the thinner line 50 and drained through the riser pipe. The thinner lead is preferred filled with a pluid, such as light oil, after the mandrel valve assembly is attached to its lower end has been. When the lower end of the valve housing 432 is in contact with the upper inclined plate 483 the guide moves anywhere above the upper end of the thinner tubular member 65, guides the upper Plate the valve body to the top of the thinner pipe member, and when the valve housing is in alignment

909839/0436

U837.76

moves the thinner tubular member, the mandrel valve assembly arrives down through this tubular member and is through the latter into the central passage or channel 388 of the elongated housing 371 out. During the downward movement the mandrel valve assembly by the Elongated housing 371 opens the valve 442 in valve housing 438 when it comes into contact with the valve stem 416 of the check valve 412 arrives, and the thinner lower portion of the valve housing moves into sealing contact with the seal assembly 394, whereupon the Valve body 404 shifted downward so that the check valve housing 411 out of sealing contact with the sealing assembly 394 arrives. For this reason there is now a fluid connection between the lower end of the thinner Line 50 and that through the concentric lines 46 and 47 defined annular channel 48 and thus with the channel 107 of the valve 45 via the valve housing section 404 and the pipe made.

Any work process on the borehole can now be repeated can be performed, with the valve 45 as required by controlling the via the thinner line 50 to the Valve 45 applied positive pressure can be opened and closed.

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U83776

If it is later desired to separate the further and the thinner surface line 49 or 50 from the connection head, the thinner line is first turned around the thread 433 of its clamping mandrel 432 from the thread-like teeth 331a of the clamping member 325a · After the thinner When surface conduit has been removed from the borehole, the additional conduit is rotated to thread 362 of its To bring the clamping mandrel 360 out of engagement with the teeth 331 of the clamping member 325, whereupon the further line 49 is attached the surface can be raised. While the further line and the clamping mandrel 360 from the connection head upwards are raised, the studs 470 come either with which the lower end of the annular recess 474 is defined lower shoulder 479 or with the shoulder 477 defining the lower ends of the slots 475 in contact. the The guide is thus raised to the surface together with the clamping mandrel.

After the tubing string 44, the valve 45 and the concentric lines 46 and 47 have been placed in the borehole once and the two surface lines can be seen to hold these parts through the anti-blowout valves 33 can easily be disconnected from these parts and reconnected to them as required, with the valve remains arranged below the blow-out protection valves; the

909839/0436 -63-

148377Θ

The ball valve holds the upper end of the tubing opposite Closed to a fluid flow when the thinner line is not connected to the connection head. The blow-out protection valves Of course, close the hanging channel 38 of the system 30 around the outer concentric line 4-6 around.

According to FIGS. 14 and 14-A, the further and the thinner Line with the help of a connection head 500 with the inner or outer concentric line 4-7 or 4-6 connected be. The lower end of the further line 49 is in the upper, internally threaded portion 501 of the Screwed connection head, while the lower end of the thinner line 50 is screwed into the upper threaded portion 502 of a passage 504 of the connection head, which is located on an inner annular shoulder 505 between threaded sections 507 and 508 in the interior of the connection head opens. The upper end of the inner concentric conduit 47 is screwed into the threaded section 507 of the connection head, while the upper end of the outer concentric conduit 46 in the lower threaded portion 508 of the Connection head is screwed in. The control fluid can in annulus 48 between the concentric conduits and through the thinner surface conduit, through the passageway 504 and then to valve 45 to flow.

909839/0436 -64-

When storm conditions occur or if so desired is to quickly disconnect the surface lines 49 and 50 from the connection head 500, the lines 49 and 50 obviously unscrewed from the connection head, after which it is necessary, the connection head 500, the concentric Pull lines and tubing to the surface to bring lines 49 and 50 back into the connection head to be able to screw in.

According to FIG. 15, the concentric lines 46 and. 47 have additional sections 46a and 47a, respectively, connected to them and extending to the surface the uppermost sections 46a and 47a being connected to a connection head 510. The topmost section of the outer Line 46 is in a lower threaded portion 511 of the connection head, while the uppermost section of the inner concentric line 47 is screwed into a threaded section 513 of the connection head is screwed in The further line 49 is in an upper threaded section

514 of the connection head, while that of the distributor outgoing line in an outer threaded section

515 of a passage 516 is screwed into the annular channel between the two concentric lines flows out. The control fluid is thus via the annular channel 48 between the extending to above the work platform

909839/0436 -65-

H83776

the concentric lines to valve 45

When a downhole rig 30a as shown in FIG 33 and the platform is permanently anchored to the sea bed, can with a ring recess 474 provided outer conduit 46 over several sections 46a with the valve 45 and over one or more sections 46b can be connected to the connection head 510. Similarly, the inner conduit 47 can be made up of a number of sections exist, which are connected to one another via corresponding pipe couplings. The inner and outer lines, the ball valve 45 and the pipe string 44 are of course held by the blowout protection valves 33, while the control pressure from the manifold to the valve 45 is set between the concentric lines Annular channel 48 is supplied and withdrawn.

Obviously, the shut-off valve is included any of the arrangements described, at a location near the bottom of the body of water, so that if If the system is damaged above the borehole, the valve closes automatically or "fail-safe" and an outflow of borehole fluids from the tubing string prevented.

909839 / 0A36

' ^6β "U83778

As can be seen above, there is a novel device shown and described for performing various operations on a borehole, which the Anti-blowout valves on the equipment used while drilling to support a pipe string and one Tentils to control the Pluidumdurehsatzes through the Pipe string exploited.

It can also be seen that the device according to the invention a flow conduit means consisting of inner and outer concentric conduits, which a hanging channel for the flow of control fluid to the and fixed by the valve, and that the outer conduit is held above the valve by a blow-out protection valve will.

In addition, it can be seen from the above description that the defined by the concentric lines Ring channel can extend to the surface if desired, as in the embodiments according to the invention 15 and 16 of the Pail, while optionally as in Case of the constructions according to the Pig. 1 and 14 a thin line 50 can be provided, which is connected to the upper end of the ring channel communicates.

909839 / CK36 BAD ORIGINAL ~

Claims (11)

It can also be seen that the flow lines 4-9 and 50 detachably attached with the aid of a connection head 51 can be, which is connected to the concentric lines above the blowout protection valves, so that the upper portions of the conduits which provide fluid flow through the tubing string and movement of downhole tools and the control fluid flowing therethrough allow through, can be easily separated from the connection head and connected to it. Of course, the above description of the invention is to be understood as an example only, since the Those skilled in the art will readily make certain changes and modifications to the details of construction shown and described are possible without departing from the scope of the invention. - 68 - 909839/0436 BAD OR.G.NAL H83776 Claims Line arrangement for a downhole installation for making an opening into the borehole vertical passage with a holding means for Pesthalten a through passage in the borehole erstrek kenden flow conduit and for closing the passageway to this line around, characterized gkennzeich- · 'net that a lower flow conduit , a fluid pressure-actuated valve connected to the lower line for controlling the fluid flow through the line and a flow line arrangement connected to the valve and extending upwardly from the latter and detectable by the holding device for guiding the fluid flowing through the valve and the other line as well as for supplying Control fluid are provided to the valve for the purpose of actuating the same and that the valve is located below the holding device when the arrangement is held in the correct position in the borehole system. -69 909839/0436 Η8377Θ 2. Arrangement according to claim 1, characterized in that the flow line arrangement two telescopically nested, Has inner and outer lines which are spaced apart from one another and which have the Define the ring channel through which the pressurized Control fluid around the valve for actuation of the same is supplied, and that the valve in the open state a fluid flow between the lower line ^ and the inner flow conduit. 3 »Arrangement according to claim 2, characterized in that the outer flow line has means which are spaced apart, facing each other, shoulders engageable with the retainer for holding the assembly against movement in the borehole system. 4. Conduit assembly for use in a downhole rig used while drilling a well, which has a blow-out protection valve, a clamping head located above this valve and a riser pipe which can be connected to the clamping head for the purpose of defining a passage through the riser pipe, the The blowout protection valve and the clamping head extend to the upper end of the wellbore casing, thereby marked 909839/0438 " ^? °" net that a valve _{f is} a pipe connected to the valve and going downward from it and two connected to the upper end of the valve, telescopically nested lines are provided, of which the inner one leads the fluid flowing through the valve and a lower line and the define between them a control channel via which control fluid is supplied to the valve for actuating the same, and in that the outer conduit is provided with means which can be brought into engagement with the blow-out protection valve in order to hold the assembly in the borehole. 5. Arrangement according to claim 4-, characterized in that a connection head is attached to the upper ends of the telescopically nested lines, the one communicating with the inner line and a second, upwardly opening, with the control channel communicating passage has that a first line in the first-mentioned passage of the connection head arranged means having a connection between the lower end of the first conduit and the upper end of the inner conduit, and that a second conduit with in the second-mentioned passage arranged means is provided which a connection between the lower end of the second line and the upper end of the control channel. 909839/0436 - 71 - H83776 6. Arrangement according to claim 5 »characterized) that a clamping device is provided on the connection head, the means provided in the two lines when the means are moved downwards into the passages of the connection head can be brought into engagement with these means with an upward movement not taking place by rotation the means prevents relative to the connection head, j 7. Arrangement according to claim 4-, characterized in that they one with the upper ends of the telescopically nested Has connected lines connection head, which is connected to a with the inner line in connection standing passage is provided and a device with a remote from this passage and a second housing defining the passage in communication with the control channel, and that a line with a in the first passage of the f Terminal head insertable clamping mandrel for production a connection between the lower end of the first conduit and the upper end of the inner conduit and a second line with a "insertable" into the housing Clamping mandrel for establishing a connection between the lower end of the second line and the upper end of the control channel are provided. - 72 909839/0436 U83778 8. An arrangement according to claim 7 »characterized, in that the connection head a first clamping means adapted to engage with the downward movement of the clamping mandrel in the first passageway of the connecting head with the KÜemmdorn and a non SUC by rotating * constricting upward movement of the clamping mandrel from the prevents first passage, and a second clamping device, which is able to come into engagement with this arrangement when the clamping mandrel arrangement is moved downwards into the second-mentioned passage and prevents an upward movement of the clamping mandrel arrangement from the second passage which is not carried out by rotating. 9. Arrangement according to claim 8, characterized in that the clamping mandrel has an outer annular recess between its ends and an outer one, going up into the recess Has opening longitudinal recess and is provided below the longitudinal recess with means which can be brought into engagement with the first clamping device that a guide is attached to the clamping mandrel is, which has a first longitudinal passage, which from the clamping mandrel is penetrated, and a second, spaced from the first passage having longitudinal passage, a horizontal bottom plate, a top plate around the passageways that is at an angle - 73 909839/0436. extends relative to the passages, has a top surface terminating with the upper ends of the passages and slopes from the first longitudinal passage to the second longitudinal passage, the plates being attached to the passages, and one extending inwardly into the second longitudinal passage and into the recesses of the Clamping mandrel has movable stop device which, when the guide is in an upper position on the clamping mandrel and the stop device in the longitudinal recess, prevents rotational movement of the clamping mandrel relative to the guide that the stop ^{device limits a longitudinal movement 1 of} the clamping mandrel relative to the guide, that an upper Section of the elongated housing is insertable into the second longitudinal passage when the second longitudinal passage is aligned with this section, and that the bottom plate contacts the elongated housing for the purpose of limiting downward movement of the guide and the clamping mandrel and engaging the pretend on the clamping mandrel Said means with the first clamping device -prevented if the second longitudinal passage is not aligned perpendicular to the elongated housing. 10. The arrangement according to claim 7 »characterized in that the housing has a valve device for closing the - 74 -809839/0436 ~ 74 - second passage of the connection head, which is biased towards its closed position and that the mandrel assembly engages the valve means has bringable means to the valve device hold in the open position when the mandrel assembly located in the housing. _k 11. The arrangement according to claim 10, characterized in that the mandrel assembly has a second valve device for controlling the fluid flow through the second-mentioned line and that the second valve device can be brought into engagement with the first valve device and upon downward movement of the clamping mandrel assembly into the second passage in the open position is brought. 12. An arrangement according to claim 10 or 11, characterized gekennzeich- ψ net, that the valve means comprises a check valve that prevents flow through the second passage to the control channel, when the valve means is in closed position. 13. Connection head, characterized by a one passage by the connecting head securing tubular member, the spacing using means for fastening the - 75 -909839/0436 has upper ends of two spaced apart telescopically nested lines on the tubular member, the interior of these lines opening upward into the passage, a clamping device carried by the tubular member for releasable engagement in a downwardly insertable clamping mandrel into the upper end of the channel, one connected to the connection head Housing that has a second, between the distance from each other _Λ defining means communicating with the tubular member passage, and one carried by the housing second clamping device which detachably engages a clamping mandrel which can be inserted downward into the upper end of the housing able. 14. Connection head according to claim 13, characterized in that the distance from each other owning means on located lower end portion of the tubular member that in the passage above this means a sealing device | device is arranged, which is in sealing contact with the lower end of a mandrel which can be inserted into the longitudinal passage able to achieve that the first clamping device above the Diehtungseinrichtung'vom tubular member is carried and releasably -i to come into engagement with an external thread of the clamping mandrel is able to, if the latter in the downward direction in the through - 76 909839/0436 gang is used that the first clamping device a clamping member with a number of circumferentially distributed, upwardly directed resilient fingers, those at their upper end cuts with internally thread-like Teeth are provided which extend inwardly for the purpose of engaging the threads of a clamping mandrel extend into the passage and the upper ends of which are resiliently movable outwards to prevent the downward movement of the thread of a clamping mandrel relative to them and to allow engagement with them, and that the thread-like Teeth of the first clamping device an upward movement of the clamping mandrel prevent when they are in engagement with its thread, but an upward one Allow rotation of the mandrel relative to them to remove the mandrel from the passage enable. 15 · Connection head according to claim 14, characterized in that the tubular member and the clamping fingers interact with one another Have cam means, which when the clamping fingers move upward in the tubular member with one another come into contact and the upper end portions of the clamping fingers inwardly into engagement with the threads of the clamping mandrel located in the passage of the connection head urge. - 77 909839/0436 1483778 16. A connection head according to claim 14, characterized in that it has a tubular housing defining a second passage opening downward between the spaced apart means in the ear member, and in that a second clamping device carried by the housing for releasably engaging a downwardly is provided in the upper end of the housing insertable clamping mandrel. Ä 17. Connection head according to claim 16, characterized in that the two clamping devices each have a clamping member with several upwardly extending resilient fingers distributed around the circumference at intervals, those at their upper end portions with thread-like Teeth are provided for engaging the threads of a mandrel that the upper ends of the Clamping fingers are resiliently movable outwardly to a downward movement of the thread of a clamping mandrel between to allow them through and into engagement with them, and that the thread-like teeth der'Klemmeinrichtungen a Prevent upward movement of the relevant clamping mandrel relative to them when they are with the thread of the clamping mandrel are engaged, but an upward twisting motion allow the clamping mandrel relative to the relevant clamping device to remove the clamping mandrel to allow from the connection head. - 78 909839/0436 " ⁷⁸ " 1483778 18. Connection head according to claim 17 »characterized in that the housing and the tubular member with the clamping fingers of the clamping member located therein have engageable means to the upper ends of the Clamping fingers when the clamping links move upwards in to push them inward. 19. Guide for attachment to a mandrel with an outer annular recess and an upward in the Ring recess - - ■ opening longitudinal recess, characterized by a central longitudinal passage and a second, from central longitudinal sag distant longitudinal du rc hg ang fixing means, the central passage being able to accommodate the clamping mandrel, a horizontal base plate and a top plate arranged around said means and angled towards said means and one terminating with the upper ends of the passages and leading to the second Having a passage sloping downwards, the panels being fastened to said means, and one extending inwardly into the central passage and engaging the recesses of the clamping mandrel Anchor device, v / obei the anchor device, when the guide is in an upper position on - 79 909839/0436 U83776 Clamping mandrel and the anchor device in the Longitudinal recess is located, a rotational movement of the clamping mandrel prevented relative to the guide and also limited the longitudinal movement of the clamping mandrel relative to the guide. 20. Guide according to claim 19, characterized in that the longitudinal recess opens outwards and that the guide has a horizontal bottom and one below extending at an angle with respect to the passages and terminating with the upper ends of the passages Has top which is inclined towards the second passage. 21. Guide according to claim 19 or 20, characterized in that that they have a tubular member defining a central longitudinal passage and a second longitudinal passage defining tubular member which has a distance from the first tubular member that the central tubular member able to accommodate a clamping mandrel passed through it so that the plates are vertically aligned with one another Have openings into which the tubular members extend that the top plate extends at an angle extends relative to the pipe members and one with the upper sides of the pipe members terminating, to the second Tubular member has inclined upper side that the 909839/0436 BADORtGLNAU " ^8ü " U83776 Plates are attached to the pipe members that the Anchor device attached to the central tubular member is and to engage in the recesses of the clamping mandrel able, with the stop device if eioh the guide is in an upper position on the clamping mandrel, which penetrates the central tubular member, and the stop device engages in the longitudinal recess, prevents rotational movement of the clamping mandrel relative to the guide, and that the stop device prevents longitudinal movement of the clamping mandrel relative to the guide. 22. Valve, characterized in that it is a tubular Housing with a longitudinal passage through it and valve devices arranged in the housing and spaced apart from one another in the longitudinal direction for separating Closing the longitudinal passage opposite a pluidum flow through this passage has that the housing at its upper end with separate means for connecting the housing to the lower ends of two or telescopically nested concentric flow lines and at its lower end with a Means for connecting the housing to a third flow line is provided so that the fluid between the third line and the inner one of the concentric - 81 909839/0436 " ^β1 " 1483779 see lines able to flow} and that the housing with a channel for the supply of control fluid to the Yen- til device of one between the concentric Lines are provided with a fixed ring channel, 23 · Valve according to claim 22, characterized in that each valve device biasing means for biasing it into its closed position as well as means responsive to positive pressure for moving it against has the resistance of the biasing means in the open position and that the housing channel joins in an upward direction between the separate devices the upper end of which opens to allow the pressure fluid to escape from the Annular space between the concentric lines the pressure sensitive means of both valve devices to feed at the same time * 24. Valve naoh claim 22 or 23, characterized in that { that each valve device has in each case a tubular piston and a tubular piston member which can be moved in the longitudinal direction in the housing and which are each provided with longitudinal channels penetrating them, that the piston member is releasable against a downward longitudinal movement relative to the piston on the latter fastening device, mutually engageable means on the piston and on the piston - 82 -9098 39/0 4 3S U83776 member to limit the upward movement of the piston member relative to the piston and one in the housing longitudinal passage arranged ball to close the longitudinal β-channel of the piston member are provided that the ball and the housing can be brought into engagement with one another to move the ball between an open and a closed position with longitudinal movement of the ball in Have longitudinal channel that the ball is provided with an axial passage, which with the longitudinal channel of the piston member communicates when the ball is in a lower position in the housing and out of communication with the longitudinal channel when the ball is in an upper closed position in which it is the The lower end of the longitudinal channel of the piston member closes a device which is operationally assigned to the piston member to move the ball between its open and its closed position with a predetermined longitudinal movement of the piston member is provided in the housing and that the piston member releasably connecting to the piston Device a downward movement of the piston member relative to the piston for the purpose of displacing the ball in the Open position enables when the piston is in its upper position and the one in the housing Fluid pressure above the ball is increased to a predetermined value. - 83 909839/0 418 U83776 25 · Valve according to claim 241, characterized in that each valve device in each case a tubular Piston, one arranged in the longitudinal passage of the housing Ball, the ball and the housing having means which can be brought into engagement with one another for displacing the ball between an open and a closed position with longitudinal movement of the ball in the longitudinal passage of the housing are provided, a device for displacing the ball which is operationally associated with the piston and the ball . with the piston between an upper closed position, in which the ball prevents fluid flow through the housing and the piston, and a lower one Open position in which the ball allows fluid to flow through the piston channel and the housing passage, and means biasing the piston member to an upper position in the housing. 26. Valve, characterized by a housing with a longitudinal passage extending through this, spaced from one another owning devices at the upper end of the housing for connecting two concentric lines to the housing, a device provided at the lower end of the housing for connecting a third line to the housing, one arranged longitudinally movable in the longitudinal passage tubular piston with an outer ring flange, where- - 84 - 909839/0436 U83776 set at the piston and housing above the Ringflaneohes a ring channel, above and below the annular channel a seal producing sealing means, a valve disposed around the housing and closed at the top and bottom of annular chamber fixed Understanding tubular member, said housing having a passageway extending at one end in the ring ^ mer and opens at the other end between the spaced apart devices, and wherein the housing has passages connecting the annular chamber with the annular channel, a tubular piston member extending downward from the piston and releasably attached to the piston against downward movement relative to the piston, wherein the piston and the piston member are provided with means which can be brought into engagement with one another for limiting an upward movement of the piston member relative to the piston and the piston and piston member are ) the communicating longitudinal channels are penetrated, one biasing the piston member upward in the housing Device, a ball rotatably mounted in the housing underneath the piston member, the ball and housing with one another engaging means for displacing the ball between an upper closed position and a lower open position with longitudinal movement of the ball have in the housing and the ball in its - 85 909839/0436 U83776 The closed position closes the longitudinal channel of the piston member, and means operatively associated with the piston member and engageable with the ball for longitudinal displacement of the ball together with the Piston member during a longitudinal movement of the piston member in the housing, the ball having one with the longitudinal channel of the piston member communicating axial passage has when the piston member is in a lower ^ Position is located in the housing, and which is out of communication with the longitudinal channel of the piston member when the piston member is in an upper position in the housing. 27. Valve according to claim 26, characterized in that the operationally associated with the ball and the piston Establishing a downward movement relative to the Piston releasably attached to this tubular piston member "and that the preloading device I the piston member resiliently urges upward in the housing. 909839 / QU «