CN103375143A

CN103375143A - Emergency elastomer injection system for use on e-line and braided cable

Info

Publication number: CN103375143A
Application number: CN201310147092.1A
Authority: CN
Inventors: A.D.休斯
Original assignee: Vetco Gray UK Ltd
Current assignee: Baker Hughes Energy Technology UK Ltd
Priority date: 2012-04-25
Filing date: 2013-04-25
Publication date: 2013-10-30
Also published as: GB201307405D0; US20130284445A1; GB2502883A; AU2013204012A1; SG194318A1; BR102013009779A2; NO20130499A1

Abstract

The invention relates to an emergency elastomer injection system for use on an e-line and a braided cable. A system and method for sealing a passage around a cable is disclosed. Embodiments of the system can include an axial passage, such as a conduit and subsea wellhead housing connected to a wellbore, that can have a cable extending therethrough. The system can include an upper restrictor and a lower restrictor for closing the axial passage. An injection module having an injector and a reservoir can be fluid communication with the axial passage at an axial location between the upper restrictor and the lower restrictor. The injector can discharge a curable sealant initially stored in the reservoir into the axial passage so that at least a portion of the sealant contacts the cable at the axial location of the restrictor while the cable remains static.

Description

Be used for the urgent elastic body injecting systems that uses at cable and woven cable

Technical field

The present invention relates generally to the mineral recovery well, and more especially relates to a kind of apparatus and method for the sealing wellhole.

Background technology

The wherein a kind of of three kinds of wires---slip (slick line), cable (e-line) or woven cable are used in wire in the wellhole (wireline) operation usually.In order to keep pressure control in these operating periods, thereby and prevent that pressure fluid from overflowing from wellhole, wire passes pressure control device.Be used for preventing that the device of pressure effusion wellhole from comprising wire preventer (" BOP "), pressure control head (" PCH "), bottom standpipe assembly (" LRP ") and lubricating coupler (lubricator).

These pressure control devices adopt different compress control methods, comprise flashboard (ram), pressure excitation package assembling (pressure energized packing set) and grease.Although these methods are different, follow identical principle, because the outside that they all center on wire forms sealing.Therefore, will be understood that the outline of wire and practical structures can change the validity of the sealing that produces greatly.For example, on woven cable, structure is so that it has mazy leakage paths, therefore, even on external diameter with closely sealing, leak the gap that also can pass in the structure that is present in cable itself.In some cases, grease under high pressure is expelled in the cable to fill the space, thereby reduces wellbore fluid and pass cable and enter and leak.Unfortunately, grease will be followed with leaking and pass the identical principle in labyrinth and finally exhaust in the duration of operation.Must replenish grease to keep long sealing.Therefore, wish that the semipermanent that has in case of emergency use seals.

Summary of the invention

The embodiment of claimed invention relates generally to sealing in emergency circumstances.Because cable and woven cable have mazy leakage paths, conventional Sealing Technology needs continuous grease injection in order to keep sealing.In some cases, for example emergency may need to keep pressure control in the long time around being sealed in of wire.Therefore the grease supply will exhaust, and possibly can't replenish or keep enough sealing loads.The embodiment of claimed invention can comprise a sealant, for example elastic body, epoxy resin or some other plastics, its any liquid state or paste form of being stored as.In certain embodiments, the sealing agent can comprise the particulate of pre-sizing.The sealing agent can be stored as the form of bi-component resin (two-part resin), and wherein, it can keep fluid state in long time limit.After actuating emergency sequence, injection module will be deployed to the chamber that limits in advance in the wellhole parts with the sealant of pressurization via one or more ports.After injection, it begins to carry out chemical change and increase viscosity until it solidifies, and finally forms sealing in mazy cable or woven cable.

A kind of for the device of sealing around the passage of cable, described device comprises:

Be suitable for making described cable to pass wherein axial passage, described cable has a plurality of line thighs;

Be used for sealing top limiter and the lower limit device of described axial passage, described top limiter and lower limit device occupy the annular space between the external diameter of the internal diameter of described axial passage and described cable; And

Injection module, described injection module has syringe and reservoir, the axial positions of described injection module between described top limiter and described lower limit device is in fluid with described axial passage and is communicated with, described syringe is discharged to the sealant of initial storage in described reservoir in the described axial passage, so that at least a portion of described sealant contacts described cable in the axial positions of described limiter, simultaneously described cable keeps static.

In another embodiment, described top limiter and described lower limit device cause described sealant to flow between at least a portion of described a plurality of line thighs.

In another embodiment, described top limiter comprises a pair of upper flashboard, and described lower limit device comprises a pair of lower flashboard, every pair of flashboard moves inwardly into punctured position vertically so that shrink in the hole, described punctured position reduces the flow of the sealant that flows out described axial passage, thereby forces at least a portion of described sealant to enter a plurality of spaces between the described line thigh.

In another embodiment, reservoir comprises the first chamber and the second chamber, described the first chamber initially has solvent, described solvent is for removing the fluid of grease, and described the second chamber initially has described sealant, wherein, before being discharged to described sealant in the described axial passage, described solvent is discharged in the described axial passage.

In another embodiment, described reservoir is arranged in remote operated vehicles, and described remote operated vehicles is thrust in the fluid passage that is communicated with described axial passage.

In another embodiment, described sealant comprises suspended particulates, and described suspended particulates are embedded in the flow restriction section in described a plurality of line thighs of described cable.

In another embodiment, in described passage, also comprise and be suitable for making described cable to pass wherein lining, described lining is suitable for initially having the internal diameter larger than the external diameter of described cable, and be deformable, with the annular space between the external diameter of the internal diameter that reduces described lining before the discharge sealant and described cable.

In another embodiment, described sealant is the curable polymer in the injection after-hardening.

In another embodiment, at least a portion of described sealant is removed the grease that is positioned at described a plurality of litzendraht wire thighs.

A kind of method for sealing around cable, described cable passes pipeline and the underwater well head assembly extends in the wellhole, and described method comprises:

(a) providing upper channel limiter and lower passage limiter above the described wellhead component, in described pipeline;

(b) provide injection module, described injection module is connected on the port that passes described ducted sidewall, described port is between described upper channel limiter and described lower passage limiter, described injection module has syringe and reservoir, and described reservoir initially holds curable encapsulant;

(c) actuate the wellhole limiter so that described upper channel limiter and lower passage limiter radially move towards the center of described wellhole; And

(d) between described upper channel limiter and lower passage limiter, described curable encapsulant is expelled to around the described pipeline of described cable by described port from described injection module.

In another embodiment, described curable encapsulant is stored as two or more the independent components in two or more independent containers in the described reservoir, described two or more independent component reaction and form described curable encapsulant, and wherein, step (d) is mixed described two or more independent components before being included in the described curable encapsulant of injection.

In another embodiment, described cable comprises braided material, and wherein, and step (d) comprises described curable encapsulant is expelled in the described braided material.

In another embodiment, described cable keeps static vertically during step (c) and step (d).

In another embodiment, step (d) occurs before in step (c).

In another embodiment, described reservoir comprises the first container and second container, described the first container initially holds solvent and described second container initially holds described curable encapsulant, and wherein, step (d) comprising: at first inject described solvent with from described cable except degreasing, and then inject described curable encapsulant.

A kind of device for sealing around cable, described cable passes the underwater well head assembly and extends in the wellhole, and described device comprises:

Axial passage, described axial passage have be suitable for the pipeline that extends above described wellhead components, and have and make described cable extend through wherein axial passage;

Be arranged in the lining of described passage, described cable extends through described lining, and described lining deformable, with the annular space between the internal diameter that reduces described lining;

Top limiter and lower limit device, described top limiter comprises that a pair of upper flashboard and described lower limit device comprise a pair of lower flashboard, every pair of flashboard in described a pair of upper flashboard and a pair of lower flashboard moves to the second place so that described lining distortion from primary importance, with the annular space between the external diameter of the internal diameter that occupies described axial passage and described cable; And

Injection module, described injection module has syringe and reservoir, described injection module between described top limiter and described lower limit device, pass the sidewall of described axial passage and fluid be communicated to position in the described axial passage, described syringe is discharged to the curable encapsulant of initial storage in described reservoir in the described axial passage, to seal between described cable and described lining.

In another embodiment, described cable comprises a plurality of line thighs, and wherein, top limiter and described lower limit device cause described sealant to flow between at least a portion of described a plurality of line thighs.

In another embodiment, described sealant comprises suspended particulates, and described suspended particulates are embedded in the flow restriction section in a plurality of line thighs of described cable.

In another embodiment, described reservoir comprises the first chamber and the second chamber, described the first chamber initially has solvent, described solvent is for removing the fluid of grease, and described the second chamber initially has described sealant, wherein, before being discharged to described sealant in the described axial passage, described solvent is discharged in the described axial passage.

Description of drawings

Make feature of the present invention, advantage and object and other side with the mode that becomes apparent in order to obtain and can to understand in more detail, can be undertaken of the present inventionly describing more specifically of summarizing above by the reference embodiments of the invention, shown in the drawings of embodiment, this accompanying drawing consists of the part of this manual.Yet therefore, should be noted that accompanying drawing only shows the preferred embodiments of the present invention and should not be considered to limit its scope, because tolerable of the present invention has other same effectively embodiment.

Fig. 1 is the partial side view of an embodiment of the pressure control head with injection module according to an embodiment of the invention.

Fig. 2 is the partial side view of the embodiment of Fig. 1, shows the pressure control head that is in pressing position.

Fig. 3 is the partial side view of the embodiment of Fig. 1, shows the pressure control head that is in pressing position and sealant has been expelled to cable sealing device in the cable.

Fig. 4 is the cross section of an exemplary embodiment of cable.

Fig. 5 is the cross section of another exemplary embodiment of cable.

Fig. 6 is the partial side view that has had sealant to be expelled to cable wherein according to an embodiment of the invention.

Fig. 7 is the partial side view in cross section of injection module according to an embodiment of the invention and bottom standpipe assembly.

Fig. 8 is the partial side view in cross section of injection module according to an embodiment of the invention and preventer.

Fig. 9 is injection module in the remote operated vehicles and the partial side view in cross section of preventer of being positioned at according to an embodiment of the invention.

Figure 10 is the partial side view in cross section of injection module according to an embodiment of the invention and lubricating coupler.

The specific embodiment

Now will describe more fully the present invention with reference to accompanying drawing hereinafter, accompanying drawing shows embodiments of the invention.Yet the present invention can be presented as many multi-form, and is not appreciated that the embodiment that illustrates that is limited to this paper elaboration.On the contrary, provide these embodiment so that the disclosure will be thorough and complete, and will pass on fully scope of the present invention to those skilled in the art.Identical label is indicated identical element in the text, and apostrophe (if use) element like the representation class in alternative.

With reference to Fig. 1, cable 100 is to pass suspend flexible cable in the wellhole (not shown) of pressure control head (PCH) 102.The cable 100 that has little diameter with respect to wellhole can be used to make the instrument of wire conveying to drop in the wellhole.PCH 102 can be used to cable 100 is formed sealing, so that the pressure from wellhole does not discharge around cable 100 in wire operating period.Hole 104 is the axial passages 102 that pass PCH.In certain embodiments, hole 104 is enough large internal diameters (" ID "), so that the instrument that wire is carried can pass PCH 102.In other embodiments, cable 100 can be carried before the instrument that attached wire is carried and pass PCH 102.

As best illustrating among Fig. 4 and Fig. 5, cable 100 can be the woven cable with the fibroplastic independent line thigh 106 of steel wire or other.Line thigh 106 can be twisted together or be woven together to provide enough hot strength and flexible to cable, so that the instrument that wire is carried drops in the wellhole.Yet, even with the line thigh 106 that tightens or weave, also can have gap 108 between the line thigh 106.Because the gap 108 around its external diameter, cable 100 also can have uneven outline or external surface.Because line thigh 106 in axial direction extends substantially, so gap 108 can form mazy leakage paths, fluid can be advanced by this leakage paths.As shown in Figure 4, have the steel wire of relatively large diameter or the cable 100 of line thigh 106 and can have larger gap 108.As shown in Figure 5, the cable 100' of line thigh 106' with minor diameter of greater number can have less gap 108', but has the gap 108' of a greater number.Cable 100 can be electric wire, or " cable ", and wherein one or more line thighs 106 are electric conductors of insulation.In certain embodiments, the external diameter of cable 100 can have protective sheath 110 or insulation sleeve 110.Sheath 110 can be around for example braiding lining of each bar insulation steel wire.Then can exist leakage paths to make fluid pass sheath 110 also transmits along each bar steel wire.

Top lubricating coupler 112 and bottom lubricating coupler 114 can be used to cable 100 is formed sealing.Such as the skilled person will appreciate, lubricating

coupler

112 and 114 can be conventional, and it can comprise that the finger is to be used for when cable 100 moves through PCH 102 grease being applied to cable 100.Grease can be filled in the cable 100 and along the gap 108 of the external diameter of cable 100.Lubricating

coupler

112 and 114 can form sealing to cable 100 during regular job.

During the high pressure conditions in wellhole, the sealing between cable 100 and lubricating

coupler

112 and 114 may be insufficient.Limiter (for example pressure excitation package assembling 116) can be used to create more reliable and more stable sealing around cable 100.In one embodiment, package assembling 116 can comprise the chamber 118 that is connected on the pressure port 120.Sealing surface 122 is inner diameter wall of chamber 118, and therefore inside 104 the axis towards the hole radially.As best illustrating like that among Fig. 2, when exerting pressure (for example pneumatic or hydraulic pressure) by pressure port 120, chamber 118 expand to cause sealing surface 120 radially inside towards the hole 104 center move to occupy the annular space in hole 104.Owing to expand in chamber 118, so that sealing surface 122 is pressed against the wellbore fluid stream in the hole 104 of passing with restriction on the external diameter of cable 100.For conventional pressure control head, the grease that applies by lubricating coupler 112,114 can reduce the wellbore fluid stream in the gap 108 between the line thigh 106 that passes cable 100.

During the period that is exposed to for a long time high pressure conditions, the grease that applies by package assembling 112 and 114 may be not enough to keep sealing.High pressure can 108 be removed grease from the gap along with past time, and in this case, wellbore fluid can flow around cable 100 and flow through cable 100, and through package assembling 116 and final the leakage left wellhole.In some cases, so long-time high pressure conditions can be emergency.

Injection module 124 can be connected to PCH 102.Injection module 124 is used to curable sealant 126 is expelled in the axial passage (for example the hole 104), so that at least a portion of sealant 126 contact cable takings 100.In one embodiment, sealant 126 is injected into the part between two flow restriction devices (such as for example package assembling 116) of being arranged in hole 104.In certain embodiments, suppose sealant 126 contact cable takings 100, sealant can be injected in the other parts of wellhole or standpipe.The flow restriction device forces sealant to flow around cable 100 and passes through cable 100.In the situation that does not have the flow restriction device, sealant 126 is tap hole 104 freely, rather than is injected in the gap 108.

As shown in Fig. 1-Fig. 3, injection module 124 has injection port 128, and it is pipe or other fluid path 104 from injection module 124 to the hole.Injection port 128 is positioned between two flow restriction devices (such as for example package assembling 116).One way valve (for example flap valve 130) can be used to prevent that the fluid in the hole 104 from moving in the injection module 124 by injection port 128.Injection module 124 can have the syringe of syringe type, and wherein, the sealant initial storage is in reservoir 132, and plunger 134 is actuated to force sealant to leave reservoir 132 hand-hole 104 of going forward side by side.In the embodiment shown in Fig. 1-Fig. 3, reservoir 132 is parts of syringe type syringe.As best illustrating among Fig. 3, reservoir 132 can hold the sealant 126 of q.s between package assembling 116 enough sealants 126 are filled in hole 104 fully, contacts with the external diameter of cable 100 with at least a portion that causes sealant.In one embodiment, have enough sealants 126 and near package assembling 116, flow through gap 108 in order at least a portion that causes sealant.

Plunger 134 can be by any the actuating in the multiple technologies.For example, plunger 134 can be connected to hydraulic piston, and from surface platform or from the hydraulic pressure moveable piston of remote operated vehicles (" ROV ") (not shown in Fig. 1-Fig. 3) with actuation plunger 134.Alternatively, plunger 134 can have guide rod, and electro-motor can make the guide rod rotation with actuation plunger 134.In another embodiment, ROV mechanically actuates injection module 124.For example, can be from the outside of wellhole parts (for example PCH 102) near the bar 136 of plunger 134, so that ROV (not shown in 1-Fig. 3) movable bar is with actuation piston 134.In one embodiment, the injection module 124 only sealing device of other in wellhole (for example PCH 102, preventer (not shown in Fig. 1-Fig. 3) and various valve (not shown in Fig. 1 to Fig. 3)) is actuated after closing, with the sealing wellhole.

Sealant 126 can be for seal clearance 108 or form the sealant of any type of sealing between the surface towards cable (for example sealing surface 120) of external diameter and the limiter of cable 100.Sealant 126 can be stored as liquid or cream, and can remain in for a long time under the fluid state.Chemical change can occur afterwards in sealant 126 in being expelled to hole 104, so that it begins sclerosis and increases viscosity.In one embodiment, sealant 126 can be the elastic body that solidifies (set) or sclerosis under predetermined condition.For example, elastic body can solidify when reaching certain temperature or pressure.In another embodiment, elastic body can solidify when being exposed to specific chemicals.Among the embodiment that elastic body solidifies in response to reaching certain pressure therein, can be so that can be to hole 104 filled elastomers with pressure selection, and elastic body will be only pressure enough height so that an elastomeric part just solidify after entering gap 108 or entering the gap that can be present between cable 100 and the sealing surface 120.In one embodiment, sealant 126 can be the curable encapsulant that just hardens after injection, for example, such as curable polymer, binary epoxy resin (binary epoxy), perhaps bi-component resin, wherein, sealant initially is stored as two kinds of independent liquid.As shown in Figure 6, two kinds of liquid can mix when they are injected in the hole, will be in the time of scheduled volume or the sealant that solidifies in response to predetermined condition thereby form.In described embodiment, sealant can be semi-permanent sealant, so that after it solidified, removing the sealing agent needed specific solvent maybe to need cavity and hole are carried out machining and do over again.

In one embodiment, sealant 126 can comprise fluid suspended particulate so that the injection after, a part of particulate with embedding (lodge) in flow restriction section (for example annular space between gap 108 or cable 100 and the sealing surface 120).As shown in Figure 6, can come with the particulate of different size by the gap between the potted line thigh 140 in cable 138 interior formation sealings.In an embodiment of the particulate that uses at least two kinds of sizes, but the large gap 144 between the larger particulate 142 interstitial wire thighs 140, and then less particulate 146 can be embedded between this larger particulate and the line thigh, and can fill little gap 148, to form more closely sealing.If necessary, then liquid sealant can finish sealing by adhering on large particulate and small particle and the line thigh.

In one embodiment, as shown in Figure 7, injection module 150 can comprise a more than reservoir.For example, injection module 150 can comprise the first reservoir 152 of holding first fluid 154 and the second holder 156 of containing fluid 158.Fluid in the reservoir 152,156 can be respectively by

plunger

160 and 162 injections.In one embodiment, can by burst disk (rupture disc) 164 with fluid containment in reservoir 152,156 to prevent that fluid from mixing too early.Alternatively, can use valve, flap valve or other device with fluid containment in reservoir 152,156.Just have before entering hole 104 among the embodiment that fluid mixes being desirably in fluid, fluid can mix in pipe 166.In one embodiment, pipe 166 can comprise that the mixing arrangement (not shown) is to promote the mixing of fluid.Mixing arrangement can be for example whirlpool or a series of deflection plate.This sealant be can be when having the epoxy resin of independent curing compound useful.Reservoir 152,156 can be but must not be identical size or identical configuration.Can pass pipe 166 from reservoir 152, a kind of fluid of 156 or multiple fluid and march to injection port 168, injection port 168 is communicated with hole 170.Can use flap valve 172 to prevent entering pipe 166 from the fluid in hole 104.

In one embodiment, fluid can be solvent and elastic body, perhaps solvent and epoxy resin.For example, reservoir 152 can initially hold the solvent that is suitable for removing grease, and reservoir 156 initially holds elastomer sealants.Can at first solvent (such as for example methyl alcohol) be expelled in the hole 170, and with solvent grease be removed from cable 174.In predetermined condition (for example time of specified rate) afterwards, the elastic body from reservoir 156 can be expelled in the hole 170 to fill the gap in the cable 174.This can be useful when for example grease occupies gap in the cable 174, and this grease can stop elastomer-filled gap.Because can remove along with the time grease, and thereby destroy sealing, can be useful so before the injection bomb gonosome, remove grease.In the embodiment that does not use solvent, when sealant is injected in the hole, removable some or all greases of the pressure of sealant.In one embodiment, can at first use from the solvent of the first reservoir 152 remove and wash away may be on cable 174 any grease, be the etchant from the second reservoir 156 subsequently.Useful etchant clear up and prepare in the cable 174 and the surface in the hole 170 to adhere to better sealant.Then can under high pressure inject the sealant from the 3rd reservoir (not shown), with fill the gap and adhere to cable 174 and the surface in hole 170 on.

Still with reference to Fig. 7, injection module 150 can be connected to bottom standpipe assembly (LRP) 176.Can use such as the such limiter blind hole 170 of flashboard 178.The lining 182 extensible LRP of passing 176 also are used to guide cable 174.Injection port 168 can be connected to lining 182 so that sealant is injected in the lining 182 when injection module 150 is actuated.When flashboard 178 when inwardly move at 170 center towards the hole, they apply enough pressure so that lining 182 around cable 174 distortion, so that the internal diameter of sleeve 182 is compressed against on the external diameter of cable 174.When sealant was injected in the lining 182, the flow path of resistance minimum will pass gap 108 (Fig. 4 and Fig. 5), thereby applies sealant in cable 174.In addition, need less sealant, because the contraction of the narrow diameter of lining 182 and lining 182 (because flashboard 178 causes) has reduced the volume of the sealant of necessary injection.In certain embodiments, because tight contraction, sealant does not flow through flashboard 178 vertically.In certain embodiments, some sealants are filled gap 108 and are flow through flashboard 178 along with it.

The sealant injecting systems is not limited to use in the pressure control head.It can be in multiple wellhole device any use, especially make the hole center on the device that wire shrinks.As shown in Figure 8, injection module 186 can be combined with preventer 188.In this embodiment, flashboard 190 inwardly towards the hole 192 center move to prevent fluid flow through orifice 192.It is interior to fill the gap in the cable 196 that injection module 186 can be expelled to sealant 194 hole 192, and cable 196 extends between flashboard 190.Sealant 194 can flow between the flashboard 190 and adhere to relative face and the annular gap between flashboard 190 and cable 196 of flashboard 190.Because it is under high pressure injected, thus near sealant 194 line thigh by cable 196 flashboard 190 can be forced, and fill the gap in the cable 196.

Still with reference to Fig. 8, injection module 186 can be and is suitable for sealant is expelled to various configurations in the hole 192.In the embodiment shown in Fig. 7, although injection module 186 is included as the reservoir 198 of cylindrical container,, reservoir 198 can be other shape.Pump 200 is connected to reservoir 198.Pump 200 can be the pump of any type, comprises for example diaphragm pump or centrifugal (impeller) pump.Pipe 202 can be connected to hole 192 with injection module 186.Can use one or more injection tips 204 so that sealant 194 is expelled in the hole 192.Fig. 7 is illustrated in two injection tips 204 that separate around the hole 192, and each injection tip is with flap valve 206.In certain embodiments, injection tip can be located to get vertically a more close limiter or another limiter (for example flashboard 190).

With reference to Fig. 9, injection module 208 can be positioned apart with standpipe 210.For example, injection module 208 can be positioned at remote operated vehicles (" ROV ") 212.In this embodiment, injection port 214 is connected to standpipe 210 between a pair of preventer (BOP) 216.The connector 218 of ROV 212 can be connected to injection port 214 so that sealant is expelled in the hole of standpipe 210.For example, ROV 212 can penetrate into injection port 214 in the fluid passage that is communicated with (also thereby with the hole of standpipe 210 being communicated with).For example, connector 218 can be speed and unloads accessory (quick disconnect fitting), and it is fitted to the corresponding speed that is positioned on the injection port 214 and unloads accessory.ROV 212 can be connected to injection port 214 with connector 218, so that after limiter (for example preventer 216) sealed around cable 220, injection module 208 can be by injection port 214 injection sealants to flood cable 220 with sealant.

With reference to Figure 10, in another embodiment, injection module 222 can be used with lubricating coupler 224.In this embodiment, limiter is lubricating coupler 226, does not need other limiter.Injection module 222 can be injected sealant by injection port 228 and is expelled in the hole 230 of lubricating coupler 224.The sealing agent is permeable passes hole 230 and in cable 232, so that cable 232 can form better sealing against lubricating coupler 226.In the embodiment shown in Figure 10, injection module 222 has guide rod 234 and is expelled to the hole 230 from reservoir 236 sealant is passed flap valve 238.

Refer again to Fig. 1-Fig. 3, in the operation of an embodiment, can form sealing around cable 100, cable 100 extends in the wellhole by pipeline (for example the hole 104) and underwater well head assembly.Can be by for example upper and lower aisle limit device (for example package assembling 116) formation sealing be provided in the pipeline above wellhead component.Injection module 124 can be connected to injection port 128, and injection port 128 is the ports that pass the sidewall in hole 104.Injection port 128 is between top package assembling 116 and bottom package assembling 116.Injection module 124 can have syringe and reservoir 132, and reservoir 132 can initially hold curable encapsulant 126.

Can actuate wellhole limiter (for example package assembling 116) so that the sealing surface 122 of limiter radially towards the hole 104 center move.Can make curable encapsulant from injection module 124 injections by injection port 128, so that curable encapsulant 124 flows around cable 100 between upper channel limiter and lower passage limiter.In certain embodiments, limiter can be actuated before injection curable encapsulant 124.

In certain embodiments, limiter can be actuated after injection curable encapsulant 124.But curable encapsulant 124 filler openings 104 permeate the gap 108 (Fig. 4) in the cable 100, and fill any annular space between the external diameter that can be present in limiter (for example sealing surface 122 of package assembling 116) and cable 100.In an embodiment, curable encapsulant 124 is curable forming the obstructions of surrounding cable 100, and fill cable 100 and the limiter of not yet actuating between the space.Subsequently, when limiter was actuated, sealing surface 122 can move inward with the curable encapsulant 124 to present curing or sclerosis and exert pressure, and was seal thereby curable encapsulant 124 is strengthened between sealing surface 122 and cable 100.In certain embodiments, after curable encapsulant 124 solidified, it can provide the assistance of preload force between any or all sealing surface.

In an embodiment, curable encapsulant 124 can be stored as two or more the independent components in two or more independent containers 152,156 in the reservoir.When these components were mixed before injection port 128 is passed in component injection or during injecting, these two or more independent components 154,158 can be reacted and be formed curable encapsulant.In an embodiment, cable 100 can comprise that braided material and curable encapsulant 124 can be injected in this braided material.In an embodiment, cable 100 can keep static during the injection of curable encapsulant 124 and during the actuating of limiter vertically.In certain embodiments, cable 100 can be mobile vertically after the injection of curable encapsulant 124, so that the part with sealant 124 of cable 100 moved towards limiter before actuating limiter.In certain embodiments, reservoir can comprise the first container and second container.The first container can initially hold solvent and second container can initially hold curable encapsulant 124.Can be before sealant injection solvent removing greases from cable 100, and injectable curable encapsulant 124 then.

Although the present invention only having carried out illustrating or describing aspect its some forms, should it is evident that for those skilled in the art the present invention is not limited to this, but be easy to without departing from the scope of the invention various changes.

Claims

1. one kind is used for sealing around the device of the passage of cable, and described device comprises:

2. device according to claim 1 is characterized in that, described top limiter and described lower limit device cause described sealant to flow between at least a portion of described a plurality of line thighs.

3. device according to claim 1, it is characterized in that, described top limiter comprises a pair of upper flashboard, and described lower limit device comprises a pair of lower flashboard, every pair of flashboard moves inwardly into punctured position vertically so that shrink in the hole, described punctured position reduces the flow of the sealant that flows out described axial passage, thereby forces at least a portion of described sealant to enter a plurality of spaces between the described line thigh.

4. device according to claim 1, it is characterized in that, reservoir comprises the first chamber and the second chamber, described the first chamber initially has solvent, described solvent is for removing the fluid of grease, and described the second chamber initially has described sealant, wherein, before being discharged to described sealant in the described axial passage described solvent is discharged in the described axial passage.

5. device according to claim 1 is characterized in that, described reservoir is arranged in remote operated vehicles, and described remote operated vehicles is thrust in the fluid passage that is communicated with described axial passage.

6. device according to claim 1 is characterized in that, described sealant comprises suspended particulates, and described suspended particulates are embedded in the flow restriction section in described a plurality of line thighs of described cable.

7. device according to claim 1, it is characterized in that, in described passage, also comprise and be suitable for making described cable to pass wherein lining, described lining is suitable for initially having the internal diameter larger than the external diameter of described cable, and be deformable, with the annular space between the external diameter of the internal diameter that reduces described lining before the discharge sealant and described cable.

8. device according to claim 1 is characterized in that, described sealant is the curable polymer in the injection after-hardening.

9. device according to claim 1 is characterized in that, at least a portion of described sealant is removed the grease that is positioned at described a plurality of litzendraht wire thighs.

10. one kind is used for centering on the method that cable seals, and described cable passes pipeline and the underwater well head assembly extends in the wellhole, and described method comprises: