CN105201446A - Bidirectional pressure-bearing blanking plug - Google Patents
Bidirectional pressure-bearing blanking plug Download PDFInfo
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- CN105201446A CN105201446A CN201510693792.XA CN201510693792A CN105201446A CN 105201446 A CN105201446 A CN 105201446A CN 201510693792 A CN201510693792 A CN 201510693792A CN 105201446 A CN105201446 A CN 105201446A
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Abstract
The invention discloses a bidirectional pressure-bearing blanking plug. The blanking plug comprises a central pipe, wherein an upper slip and a lower slip sleeve the central pipe, and are opposite to each other; the upper slip is connected with an upper slip holder and an upper cone; the lower slip is connected with a lower slip holder and a lower cone; the upper slip holder is connected with the lower slip holder; a fusible pin is arranged between the lower slip holder and the upper slip holder; an axial displacement guiding spacing device is arranged between each of the upper slip holder and the upper cone as well as between the lower slip holder and the lower cone; the upper cone is fixedly connected with an upper rubber tube; the lower cone is fixedly connected with a lower rubber tube; the upper rubber tube and an upper rubber tube wedging seat are connected in a clamping manner, and the lower rubber tube and a lower rubber tube wedging seat are connected in a clamping manner; the upper rubber tube wedging seat is connected with the central pipe through a lock ring seat and an unlockable lock ring; the lower rubber tube wedging seat is connected with the central pipe through a lock ring sleeve, a lower lock ring and a lower joint. The bidirectional pressure-bearing blanking plug provided by the invention has the advantages that a requirement for bidirectional pressure-bearing in a gas well can be met; the seat sealing of a seat clamp is reliable; the pulling is convenient; the acting force for seat sealing and unsealing is small; a requirement for steel wire pulling can be met.
Description
Technical field
The present invention relates to a kind of oil gas field downhole tool, particularly relate to a kind of gas well blanking plug.
Background technology
Blanking plug is the downhole tool that oil gas field is conventional, is mainly used in carrying out shutoff to oil pipe, thus has assisted multiple underground work.Need for different underground work, the various blanking plug with difference in functionality and form of structure emerges in an endless stream.
At gas field production field, a lot of gas wells all can after operation certain hour along with the production cycle continue and output constantly declines, even can cause final stopping production.The reason producing this problem has many aspects, its one of the main reasons is that shaft bottom hydrops and Liquid output increase, and gas well, once there is hydrops, will mean that ever-increasing shaft bottom fluid column back pressure causes bottom hole flowing pressure to increase, producing pressure differential reduces, thus causes output amplitude to decline.In order to realize the stable yields volume increase of gas well, the effective throttling speedup new technology of preparing such as Downhole Choking Technology technology, speed pipe string technology technology obtained Application and Development at nearly 2 years, Downhole Choking Technology technology, speed pipe string technology technology are according to reducer pipe Hydrodynamics Theory, the nozzle or the speed tubing string that arrange less overflow section make downhole fluid speed increase, thus the fluid-carrying capability in lifting gas generation process, continuous minimizing shaft bottom hydrops, recover the discharge opeing gas-forming reaction that blowing is produced, maintain gas well normally to produce, reach good stable yields volume increase object.
State in the process of throttling speedup technology on the implementation, blanking plug is applied to carrying out shutoff to gas well liquid loading tubing string, to implement in throttling speedup technology to realize snubbing serving in work progress, and the requirement of corollary apparatus to blanking plug of different throttling speedup technologies is also not quite similar, blanking plug under application scenario residing for the present invention requires that blanking plug its center pipe is straight pipe, be connected with pump in the bottom of blanking plug and drive joint, drop into and sit card at blanking plug to set front and back pump and drive joint and be in closed condition, shutoff is realized to original production tubing string, now blanking plug bears and must upward pressure by mine gas, and before the corollary apparatus installation of throttling speedup technology is put into production, need to overcome down-hole pressure by the high pressure nitrogen of aboveground input thus open pump and open joint unlatching production passage, at this moment blanking plug needs to bear the downward pressure of aboveground nitrogen, i.e. blanking plug necessary energy bidirectional bearing, this proposes new requirement to the seat card device of blanking plug and seating and sealing unit, meanwhile, the blanking plug under application scenario residing for the present invention also requires that blanking plug can easily carry out throwing, dragging for operation, requires to adopt lower-cost steel wire instrument to carry out pulling, and the active force setting process and deblocking process so just must be less, these requirements cannot meet in existing blanking plug.
Summary of the invention
For the above-mentioned deficiency existing for prior art, technical problem to be solved by this invention is to provide a kind of bidirectional bearing blanking plug, and it can meet the requirement of bidirectional bearing in gas well, sits card and sets reliably, pulling simultaneously facilitates, it is little to set with deblocking active force, meets the requirement of wire Launching and Bailing.
In order to solve the problems of the technologies described above, a kind of bidirectional bearing blanking plug of the present invention, comprise central tube, packing element and be sleeved on outside central tube slips, slips is connected in slips support, the overhanging end of slips is connected with cone, described slips comprises two groups, and one group is upper slips, and another group is lower slips, upper slips and the opposing setting of lower slips, upper slips is corresponding with upper slips holder and upper cone to be connected, and lower slips is corresponding with lower slips holder and lower cone to be connected, and described upper slips holder is connected with lower slips holder, fusible pin is provided with between described lower slips holder and upper slips holder, be provided with axial displacement guide position limiter between described upper slips holder and upper cone, between lower slips holder and lower cone, be provided with axial displacement guide position limiter, described packing element comprises packing element and lower rubber cylinder, gluing jacket casing is contained on upper joint sleeve, upper joint sleeve is sleeved on central tube, upper joint sleeve lower end and upper cone are connected, upper packing element lower end and upper cone are connected, the internal taper hole outer end of upper packing element upper end is provided with packing element clamping step, upper joint sleeve is also set with packing element wedging seat, upper packing element wedging seat lower end is wedging round table surface, wedging seat clamping step is provided with above wedging round table surface, wedging seat clamping step can be connected with packing element clamping step in clamping, upper joint sleeve upper end is provided with adapter sleeve convex shoulder, described upper packing element wedging seat endoporus is the stepped hole with this adapter sleeve convex shoulder snapping, described lower rubber cylinder is sleeved on lower joint sleeve, lower joint sleeve is sleeved on central tube, lower joint sleeve upper end and lower cone are connected, lower rubber cylinder upper end and lower cone are connected, the internal taper hole outer end of lower rubber cylinder lower end is provided with packing element clamping step, lower joint sleeve is also set with lower rubber cylinder wedging seat, lower rubber cylinder wedging seat upper end is wedging round table surface, wedging seat clamping step is provided with below wedging round table surface, wedging seat clamping step can be connected with packing element clamping step in clamping, lower joint sleeve lower end is provided with adapter sleeve convex shoulder, described lower rubber cylinder wedging seat endoporus is the stepped hole with this adapter sleeve convex shoulder snapping.
In said structure, because described slips comprises two groups, one group is upper slips, another group is lower slips, upper slips and the opposing setting of lower slips, upper slips is corresponding with upper slips holder and upper cone to be connected, lower slips is corresponding with lower slips holder and lower cone to be connected, described upper slips holder is connected with lower slips holder, then the upper slips of opposing setting and these two groups of slips actings in conjunction of lower slips not only can clamp grappling with flow string tube wall better, can also respectively better to the pressure that should bear in upper and lower both direction, pressure from down-hole is larger, to make when being applied on lower cone corresponding to lower slips to block tighter between lower slips and tube wall, and it is larger from aboveground pressure, to make when being applied on upper cone corresponding to upper slips to block tighter between upper slips and tube wall, thus ensure that the good result of bidirectionally anchoring, and described upper slips holder is connected with lower slips holder, then make to sit to snap past in journey at blanking plug to make axially loaded between upper slips and lower slips mutually balance, thus make the radial joint open of upper slips and lower slips close, and then upper slips and lower slips is made to obtain balanced seat card effect.
Again owing to being provided with fusible pin between described lower slips holder and upper slips holder, then fusible pin has the lower and fusing point comparatively determined, can keep being fixedly connected with between upper slips holder with lower slips holder before reaching melting temperature, and time in the environment reaching fusible pin fusing point, fusible pin fusing, will automatically terminate the relation of being connected between lower slips holder with upper slips holder can be flexibly connected each other.Owing to employing upper slips and the lower slips of opposing setting in this blanking plug, realize sitting card motion for ease of upper slips and lower slips perfect balance, need can mutually be flexibly connected between upper slips holder with lower slips holder, and under blanking plug in throwing process, lower slips has the possibility moved downward under the effect of deadweight, if lower slips touches lower cone, with regard to likely outwards opening with the clamping of flow string tube wall, thus there is the fault of sitting card in advance, in this case, also wish can be flexibly connected vertically between upper slips holder with lower slips holder, when in throwing process under blanking plug, contingency lower slips touches flow string tube wall, the frictional force produced between the two moves axially producing between the holder of drive lower slips and upper slips holder, make lower slips moves, thus disengage with lower cone, lower slips also can will not contact with flow string tube wall thereupon inwardly shrinking again, thus can ensure that blanking plug is smooth, reliably, throw into precalculated position down easily, but under blanking plug, in throwing process, then wish that lower slips does not produce with flow string contact and avoid sitting in advance the generation of the faults such as card.The fusible pin arranged between lower slips holder and upper slips holder meets such requirement well, in LAP quite long reach required down well placement in throwing process under blanking plug before, fusible pin makes lower slips holder be fixed on position higher in upper slips holder, displacement to axial can not be there is between the two, lower slips also would not contact with lower cone, ensure carrying out smoothly of lower throwing process, and when close to required position, the temperature that fusible pin has due to down-hole respective depth and fusing, can freely move axially between upper slips holder and lower slips holder, thus ensure that lower administration sits reliable realization and the ideal effect of card.
Also owing to being provided with axial displacement guide position limiter between described upper slips holder and upper cone, axial displacement guide position limiter is provided with between lower slips holder and lower cone, then axial location guide position limiter ensure that both be necessary between upper slips holder and upper cone and between lower slips holder and lower cone move axially space, to ensure that upper slips and lower slips sit the axial displacement required for card, can not to cause again between upper slips holder and upper cone and axial excessive separation between lower slips holder and lower cone, thus further ensure the reliable and convenient of blanking plug pulling.
Again because described packing element comprises upper packing element and lower rubber cylinder, gluing jacket casing is contained on upper joint sleeve, upper joint sleeve is sleeved on central tube, upper joint sleeve lower end and upper cone are connected, upper packing element lower end and upper cone are connected, the internal taper hole outer end of upper packing element upper end is provided with packing element clamping step, upper joint sleeve is also set with packing element wedging seat, upper packing element wedging seat lower end is wedging round table surface, wedging seat clamping step is provided with above wedging round table surface, wedging seat clamping step can be connected with packing element clamping step in clamping, upper joint sleeve upper end is provided with adapter sleeve convex shoulder, described upper packing element wedging seat endoporus is the stepped hole with this adapter sleeve convex shoulder snapping, described lower rubber cylinder is sleeved on lower joint sleeve, lower joint sleeve is sleeved on central tube, lower joint sleeve upper end and lower cone are connected, lower rubber cylinder upper end and lower cone are connected, the internal taper hole outer end of lower rubber cylinder lower end is provided with packing element clamping step, lower joint sleeve is also set with lower rubber cylinder wedging seat, lower rubber cylinder wedging seat upper end is wedging round table surface, wedging seat clamping step is provided with below wedging round table surface, wedging seat clamping step can be connected with packing element clamping step in clamping, lower joint sleeve lower end is provided with adapter sleeve convex shoulder, described lower rubber cylinder wedging seat endoporus is the stepped hole with this adapter sleeve convex shoulder snapping, then go up packing element and lower rubber cylinder all adopts wedging spreading formula hermetically-sealed construction, seal by making packing element external diameter increase in wedging round table surface wedging packing element, by axial compression, external diameter is increased with the conventional compression type glue barrel in circular body and compared with sealing, it sets, deblocking active force is little all relatively little, the requirement of wire Launching and Bailing can be met, and upper packing element is positioned at above upper slips, then be positioned at upper packing element wedging seat above packing element be subject to downward set card active force after, passing motion to upper cone by upper packing element on the one hand makes upper slips sit card, in another aspect, packing element wedging seat is wedged in packing element internal taper hole, gluing barrel dliameter is set to spreading, and when blanking plug is subject to aboveground pressure, upper packing element wedging seat can be wedged into further in packing element under the effect of aboveground pressure, makes its sealing effectiveness better, simultaneously, upper packing element wedging seat is after in wedging, packing element sets, wedging seat clamping step and packing element clamping step are at axial just mutual snapping, create spacing to the axially-movable between upper packing element wedging seat and upper packing element, add the resistance producing axial separation between packing element wedging seat and upper packing element under the effect of radial sealing force voluntarily, thus avoid after packing element sets and issuablely due to the alternating action of down-hole and aboveground pressure to loosen, further ensure the reliability set, in addition, adapter sleeve convex shoulder set by upper joint sleeve upper end and upper packing element wedging seat stepped hole are interlockingly connected, the axial location between packing element wedging seat and upper packing element can be made to obtain spacing, the small end of upper packing element wedging seat wedging round table surface can remain in the endoporus of the packing element clamping step on packing element, be convenient to the upper packing element of packing element wedging seat wedging set, and solution be honored as a queen gluing cylinder wedging seat can by adapter sleeve convex shoulder by unfreezing force transmission to upper cone, upper cone moved upward and makes upper slips radial contraction, realizing unfreezing easily.
Similarly, lower rubber cylinder is positioned at below lower slips, the form of structure of the form of structure of lower rubber cylinder, lower rubber cylinder wedging seat, lower joint sleeve and lower cone and installation relation each other and upper packing element, upper packing element wedging seat, upper joint sleeve and upper cone and installation relation each other corresponding, for the pressure from down-hole, its there is same sealing effectiveness and set, the action effect of deblocking and unfreezing.
By technique scheme, this blanking plug can meet the requirement of bidirectional bearing in gas well, and seat card sets reliably, and pulling simultaneously facilitates, it is little to set with deblocking active force, meets the requirement of wire Launching and Bailing.
A kind of preferred embodiment of the present invention, lock ring is connected with by unidirectional ratchet in described central tube upper end, lock ring forms by being in same at least two mortice locks watt circumferentially, banding spring is circumferentially provided with at lock ring, lock ring upper end endoporus is bellmouth, cylindrical hole is provided with between bellmouth and unidirectional ratchet, the diameter A of cylindrical hole is greater than the root diameter B of unidirectional ratchet, described lock ring is arranged in lock ring seat, lock ring seat lower end and upper packing element wedging seat are connected, fishing neck cover is fixed with in lock ring seat upper end, solution lock tube is socketed with by shear pin in fishing neck cover, this solution lock tube is pluggable in the cylindrical hole of lock ring, when lock ring and central tube are in clamped condition, separate the external diameter C of lock tube lower surface to be between bellmouth outside diameter in lock ring and end diameter.Adopt this embodiment, the lock ring that at least two mortice locks watt are formed under the banding effect of banding spring with central tube by unidirectional ratchet clamping, the single-way moving of lock ring on central tube can be realized, when apply certain active force on fishing neck cover time, fishing neck cover can make lock ring move downward on central tube by lock ring seat, thus drive upper packing element wedging seat to move down to realize setting and sit watt of upper packing element and upper slips, set card and maintain the relative position with central tube with aft closure ring by unidirectional ratchet, make packing element wedging seat must not on move, ensure that and set the firm of card, and after solution lock tube is subject to certain effect power, shear pin between solution lock tube and fishing neck overlap is cut off, separate lock tube can move downward and be inserted in the cylindrical hole in lock ring under the guiding of lock ring internal tapered hole, make that lock ring respectively locks watt tightening force overcoming banding spring and radial direction is opened, unidirectional ratchet on lock ring endoporus and the unidirectional ratchet on central tube are thrown off and are contacted, just can movement arbitrarily between lock ring and central tube, when upwards mentioning fishing neck cover, just upper packing element wedging seat is driven to move upward by lock ring seat, thus make packing element deblocking, and drive upper cone to move up by upper joint sleeve by the snapping of upper packing element wedging seat endoporus and upper joint sleeve upper joint sleeve convex shoulder and make upper slips unfreezing, thus realize the deblocking releasing of upper packing element and upper slips easily.
Another kind of preferred embodiment of the present invention, central tube is socketed with lock ring cover, lock ring cover is connected with basepipe seal by two place's lock ring cover sealing rings on endoporus, hole wall below lock ring cover sealing ring is provided with through hole, tube wall corresponding with this lead to the hole site on central tube is provided with the input balance pipe led to this through hole, lock ring set upper side and lower rubber cylinder wedging seat are connected, lock ring cover lower end endoporus is provided with unidirectional ratchet, the unidirectional ratchet place of lock ring cover endoporus lower end, lower end is connected with lower lock ring, described lower lock ring is installed between lower lock ring back-up ring and lower contact, lower lock ring back-up ring and lower contact are connected in central tube lower end.Adopt this embodiment, the gases at high pressure of whole blanking plug down-hole in lower throwing process can be overlapped the through hole on the hole wall below sealing ring and the input balance pipe on central tube tube wall and enter into central tube endoporus and communicate with above blanking plug by lock ring, the air pressure of blanking plug upper and lower is balanced, and ensure that carrying out smoothly of blanking plug launch process, and when blanking plug arrive required by down well placement time, between lower slips holder and upper slips holder because fusible pin fuses the state that is movably connected, on carry central tube and just make lower slips and flow string clamping, continuation being carried central tube drives lock ring and lock ring down to produce relative movement between overlapping the lower contact making to be connected in central tube lower end, input balance pipe on central tube can on move on to lock ring and put between two place lock rings cover sealing rings, make blanking plug throw in balance pipe to close, be convenient to setting and sitting card of lower rubber cylinder and lower slips, when carrying the step end face making lower lock ring back-up ring upper surface and lock ring overlap endoporus on central tube continues and contacting, just can drive on lower rubber cylinder wedging seat and move, thus realize setting and sitting card of lower rubber cylinder and lower slips easily, after lower rubber cylinder sets, lower lock ring makes lock ring overlap by unidirectional ratchet and maintains relative position with central tube, lower rubber cylinder wedging seat must not move down, ensure that and set the firm of card.
Another preferred embodiment of the present invention, in lower contact lower end, endoporus is plugged with balance sliding sleeve, balance sliding sleeve endoporus is provided with unlatching convex shoulder, balance sliding sleeve is tightly connected by the two place's sliding sleeve sealing rings and lower contact being arranged on lower contact endoporus, and the hole wall between lower contact two place sliding sleeve sealing ring is provided with salvages balance air vent.Adopt this embodiment, under blanking plug throw and course of normal operation in, salvaging balance air vent is closed by two place's sliding sleeve sealing rings of lower contact endoporus by balance sliding sleeve, the gases at high pressure of down-hole must not be salvaged balance air vent by this and enter in central tube, and when blanking plug salvaged by needs, the unlatching convex shoulder that fishing tool is arranged by balance sliding sleeve endoporus pushes balance sliding sleeve open disengaging sliding sleeve sealing ring downwards, the gases at high pressure of down-hole just enter in central tube by salvaging balance air vent, make on blanking plug, lower air pressure balance, be convenient to blanking plug salvage smoothly.
Further preferred embodiment of the present invention, described upper slips holder lower end is plugged between central tube and lower slips holder, upper slips holder lower end cylindrical is provided with guide groove vertically, lower slips holder upper end hole wall arranges pluggable dog screw in this guide groove, and upper slips holder is connected by dog screw and guide groove are movable with lower slips holder.Adopt this embodiment, upper slips holder and the mutual grafting of lower slips holder, structure is simple, compact, when after fusible pin fusing, dog screw and guide groove coordinate can ensure axial being flexibly connected between upper slips holder with lower slips holder, and the length according to guide groove can determine its stroke moved axially easily.
Another further preferred embodiment of the present invention, described fusible pin is cylindricality pin, fusible pin is plugged on lower slips holder and upper slips holder through the screwed hole on the hole wall of lower slips holder upper end, screwed hole outside fusible pin is connected with fusible pin locking screw, and this is fusible, and pin locking screw is the tubular member of hollow.Adopt this embodiment, fusible pin can be made well location to be installed by fusible pin locking screw, install reliably in transport or the course of work, can not come off; Fusible material liquid after fusing can flow out from the hole of fusible pin locking screw hollow, thus can to ensure between upper slips holder with lower slips holder automatically and reliably throw off and be connected.
Another further preferred embodiment of the present invention, described axial displacement guide position limiter comprises guide rod, guide rod is provided with connecting thread, the guide rod other end is provided with guide rod convex shoulder, guide rod in the axial displacement guide position limiter arranged between upper slips holder and upper cone is fixed on upper slips holder upper end by connecting thread, and guide rod convex shoulder is plugged in the guide hole of upper cone lower end; Guide rod in the axial displacement guide position limiter arranged between described lower slips holder and lower cone is fixed on lower slips holder lower end by connecting thread, and guide rod convex shoulder is plugged in the guide hole of lower cone upper end; The aperture of described upper cone lower end guide hole and lower cone upper end guide hole is provided with stop collar.Adopt this embodiment, by the guiding of the axial displacement that can ensure between upper slips holder and upper cone and between lower slips holder and lower cone that is connected between guide rod and corresponding guide hole, the stop collar that the aperture of guide hole is arranged coordinates with the guide hole degree of depth and to ensure that between upper slips holder and upper cone and axial displacement spacing between lower slips holder and lower cone, structure is simple, reliable, easily manufactured.
The present invention is preferred embodiment further, and the internal taper hole outside diameter D of described upper packing element is less than the outside diameter E of wedging round table surface on packing element wedging seat; The outside diameter D of the internal taper hole of described lower rubber cylinder is less than the outside diameter E of wedging round table surface on lower rubber cylinder wedging seat.Adopt this embodiment, can less upper packing element wedging seat and lower rubber cylinder wedging seat set stroke under formed required for radial tensioner amount, ensure better to set effect.
Another further preferred embodiment of the present invention, described lock ring is made up of three mortice locks watt, and described banding spring is circular tube shaped spring spiral stretching spring or tube wall having subdivision groove.Adopt this embodiment, the unidirectional ratchet of being convenient to that three mortice locks watt can adapt under the lock ring diameter commonly used throws off the requirement contacted, spiral stretching spring is simple as banding spring structure, it is relatively convenient to manufacture, and circular tube shaped spring tube wall having subdivision groove is succinct as its profile of banding spring, be not subject to impurity in use procedure be infected with and affect result of use, and radial thickness dimension is little, compact conformation.
The another further preferred embodiment of the present invention, is provided with and salvages clamping neck in the endoporus of described fishing neck set upper side, is provided with and throws in clamping neck in the endoporus of central tube upper end.Adopt this embodiment, fishing neck put set salvaging clamping neck can so that fishing tool and fishing neck overlap between connection, reliably realize upper packing element and the deblocking releasing of upper slips and the salvaging of whole blanking plug are carried; Input clamping neck set on central tube can so that connection between delivery tool and central tube, reliably realizes setting to sit and blocking of the input of whole blanking plug and lower slips and lower rubber cylinder.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is the structural representation of a kind of detailed description of the invention of bidirectional bearing blanking plug of the present invention;
Fig. 2 is the enlarged diagram at the epimere of structure shown in Fig. 1 position;
Fig. 3 is the package assembly schematic diagram of lock ring and banding spring in structure shown in Fig. 2;
Fig. 4 is the enlarged diagram at position, the stage casing of structure shown in Fig. 1;
Fig. 5 is upper packing element in structure shown in Fig. 4, between upper packing element wedging seat and upper joint sleeve and lower rubber cylinder, the close-up schematic view of binding site between lower rubber cylinder wedging seat and lower joint sleeve;
Fig. 6 is the close-up schematic view at fusible pin position in structure shown in Fig. 4;
Fig. 7 is the enlarged diagram at the hypomere of structure shown in Fig. 1 position.
In figure: 1-fishing neck cover, 2-separates lock tube, 3-shear pin, 4-lock ring seat, 5-lock ring, 6-central tube, 7-upper packing element wedging seat, the upper packing element of 8-, 9-upper joint sleeve, 10-upper cone, 11-upper slips, 12-axial displacement guide position limiter, the holder of 13-upper slips, 14-is fusible pin, the holder of 15-lower slips, 16-lower slips, 17-lower cone, 18-lower rubber cylinder, 19-lower joint sleeve, 20-lower rubber cylinder wedging seat, 21-lock ring cover, lock ring back-up ring under 22-, lock ring under 23-, 24-lower contact, 25-balances sliding sleeve, 26-salvages clamping neck, 27-bellmouth, 28-cylindrical hole, 29-banding spring, 30-throws in clamping neck, 31-lock watt, 32-guide hole, 33-guide rod convex shoulder, 34-stop collar, 35-guide rod, 36-dog screw, 37-guide groove, 38-internal taper hole, 39-packing element clamping step, 40-adapter sleeve convex shoulder, 41-wedging round table surface, 42-wedging seat clamping step, 43-is fusible pin locking screw, 44-lock ring cover sealing ring, 45-through hole, 46-throws in balance pipe, 47-sliding sleeve sealing ring, 48-opens convex shoulder.
Detailed description of the invention
In the bidirectional bearing blanking plug shown in Fig. 1, central tube 6 is the basic component of whole bidirectional bearing blanking plug, and the main working parts such as packing element, slips of blanking plug is all sleeved on central tube 6, and central tube 6 is the circular tube shaped component of hollow.
As best shown in figs. 1 and 4, central tube 6 is set with two groups of slips, one group is upper slips 11, another group is lower slips 16, upper slips 11 and lower slips 16 are respectively three, three upper slipses 11 and three lower slipses 16 are all in circumferentially uniform setting, upper slips 11 is positioned at above lower slips 16, upper slips 11 and the opposing setting of lower slips 16, upper slips 11 is corresponding with upper slips holder 13 and upper cone 10 to be connected, lower slips 16 is corresponding with lower slips holder 15 and lower cone 17 to be connected, upper slips holder 13 is connected with lower slips holder 15, upper slips holder 13 lower end is plugged between central tube 6 and lower slips holder 15, upper slips holder 13 lower end cylindrical is arranged vertically and is processed with guide groove 37, lower slips holder 15 upper end hole wall is arranged pluggable dog screw 36 in this guide groove 37 is installed, upper slips holder 13 is connected with guide groove 37 is movable by dog screw 36 with lower slips holder 15, fusible pin 14 is provided with between lower slips holder 15 and upper slips holder 13, as shown in Figure 6, fusible pin 14 is the cylindricality pin using low melting point fusible metal alloy material to make, it is plugged on lower slips holder 15 and upper slips holder 13 through the screwed hole on the hole wall of lower slips holder 15 upper end, screwed hole outside fusible pin 14 is connected with fusible pin locking screw 43, fusible pin 14 is locked between lower slips holder 15 and upper slips holder 13, fusible pin locking screw 43 is the tubular member of hollow, when fusible pin 14 fuses under certain downhole temperature, the fusible metal alloy material of fusing can flow out from the hole of fusible pin locking screw 43 hollow.
Axial displacement guide position limiter 12 is provided with between upper slips holder 13 and upper cone 10, the axial displacement guide position limiter 12 at this place has three covers, three cover axial displacement guide position limiters 12 circumference uniform and and upper slips 11 interval arrange, every suit axial displacement guide position limiter 12 comprises guide rod 35, guide rod 35 one end is provided with connecting thread, the other end is provided with guide rod convex shoulder 33, guide rod 35 is fixed on upper slips holder 13 upper end by connecting thread, guide rod convex shoulder 33 is plugged in the guide hole 32 of upper cone 10 lower end, guide effect is played to the motion of guide rod 35, the aperture of upper cone 10 lower end guide hole 32 is provided with stop collar 34, the aperture of stop collar 34 is less than the external diameter of guide rod convex shoulder 33, guide rod 35 is installed through stop collar 34, stop collar 34 limits the stroke of guide rod 35 by guide rod convex shoulder 33, also the displacement between upper slips holder 13 and upper cone 10 is just limited, be provided with axial displacement guide position limiter 12 equally between lower slips holder 15 with lower cone 17, the axial displacement guide position limiter 12 at this place also has three covers, three cover axial displacement guide position limiters 12 circumference uniform and and lower slips 16 interval arrange, guide rod 35 in axial displacement guide position limiter 12 is fixed on lower slips holder 15 lower end by connecting thread, guide rod convex shoulder 33 is plugged in the guide hole 32 of lower cone 17 upper end, plays guide effect to the motion of guide rod 35, the aperture of lower cone 17 upper end guide hole 32 is provided with stop collar 34, the aperture of stop collar 34 is less than the external diameter of guide rod convex shoulder 33, guide rod 35 is installed through stop collar 34, stop collar 34 limits the stroke of guide rod 35 by guide rod convex shoulder 33, also just limits the displacement between lower slips holder 15 and upper cone 17.
Packing element 8 is provided with above upper cone 10, upper packing element 8 is sleeved on upper joint sleeve 9, upper joint sleeve 9 is sleeved on central tube 6, upper joint sleeve 9 lower end and upper cone 10 are connected by connecting thread, upper packing element 8 lower end is fixed with one with upper cone 10 in making forming process, upper joint sleeve 9 is also set with packing element wedging seat 7, upper packing element wedging seat 7 is positioned at above packing element 8, upper packing element 8, structural relation between upper packing element wedging seat 7 and upper joint sleeve 9 is shown in Figure 5, internal taper hole 38 outer end of upper packing element 8 upper end is provided with packing element clamping step 39, upper packing element wedging seat 7 lower end is wedging round table surface 41, wedging seat clamping step 42 is provided with above wedging round table surface 41, internal taper hole 38 outside diameter D is less than the outside diameter E of wedging round table surface 41, wedging seat clamping step 42 can be connected with packing element clamping step 39 in clamping, upper joint sleeve 9 upper end is provided with adapter sleeve convex shoulder 40, described upper packing element wedging seat 7 endoporus is the stepped hole with this adapter sleeve convex shoulder 40 snapping, lower rubber cylinder 18 is provided with below lower cone 17, lower rubber cylinder 18 is sleeved on lower joint sleeve 19, lower joint sleeve 19 is sleeved on central tube 6, lower joint sleeve 19 upper end and lower cone 17 are connected by screw thread, lower rubber cylinder 18 upper end is fixed with one with lower cone 17 in making forming process, lower joint sleeve 19 is also set with lower rubber cylinder wedging seat 20, lower rubber cylinder wedging seat 20 is positioned at below lower rubber cylinder 18, packing element 18, structural relation between lower rubber cylinder wedging seat 20 and lower joint sleeve 19 is see also shown in Fig. 5, internal taper hole 38 outer end of lower rubber cylinder 18 lower end is provided with packing element clamping step 39, lower rubber cylinder wedging seat 20 upper end is wedging round table surface 41, wedging seat clamping step 42 is provided with below wedging round table surface 41, internal taper hole 38 outside diameter D is less than the outside diameter E of wedging round table surface 41, wedging seat clamping step 42 can be connected with packing element clamping step 39 in clamping, lower joint sleeve 19 lower end is provided with adapter sleeve convex shoulder 40, described lower rubber cylinder wedging seat 20 endoporus is the stepped hole with this adapter sleeve convex shoulder 40 snapping.
As depicted in figs. 1 and 2, be provided with in the endoporus of central tube 6 upper end and throw in clamping neck 30, central tube 6 upper end cylindrical is provided with one section of unidirectional ratchet, unidirectional ratchet is some gear rings be processed into vertically, each gear ring comprise one with axially vertical planar annular and a conical surface, central tube 6 is connected with lock ring 5 by unidirectional ratchet, lock ring 5 forms by being in same three mortice locks circumferentially watts 31, see Fig. 3, certainly, lock ring 5 also can by two, four or more mortice lock watt 31 compositions, lock ring 5 excircle is provided with banding spring 29, this banding spring 29 is spiral stretching spring, banding spring 29 equally also can adopt tube wall axially to have the circular tube shaped spring of subdivision groove, lock ring 5 endoporus lower end is unidirectional ratchet, endoporus upper end is bellmouth 27, cylindrical hole 28 is provided with between bellmouth 27 and unidirectional ratchet, the diameter A of cylindrical hole 28 is greater than the root diameter B of unidirectional ratchet, described lock ring 5 is arranged in lock ring seat 4, enough radial clearances are left between lock ring 5 external diameter and lock ring seat 4, to ensure that lock ring 5 can fully open the clamping departing from unidirectional ratchet between central tube 6, lock ring seat 4 lower end and upper packing element wedging seat 7 spin and are connected, spin in lock ring seat 4 upper end and be fixed with fishing neck cover 1, fishing neck overlaps in 1 upper end endoporus to be provided with salvages clamping neck 26, overlap 1 lower end endoporus at fishing neck and be socketed with solution lock tube 2 by shear pin 3, this solution lock tube 2 is pluggable in the cylindrical hole 28 of lock ring 5, when lock ring 5 and central tube 6 are in clamped condition, separate the external diameter C of lock tube 2 lower surface to be between bellmouth 27 outside diameter in lock ring 5 and end diameter.
As shown in Figure 1 and Figure 7, central tube 6 is socketed with lock ring cover 21, lock ring cover 21 is tightly connected with central tube 6 by two place's lock ring cover sealing rings 44 on endoporus, hole wall below lock ring cover sealing ring 44 is provided with through hole 45, tube wall corresponding with this through hole 45 position on central tube 6 is provided with the input balance pipe 46 led to this through hole 45, lock ring overlaps 21 upper ends and lower rubber cylinder wedging seat 20 and spins and be connected, lock ring overlaps 21 lower end endoporus and is provided with unidirectional ratchet, the unidirectional ratchet place that lock ring overlaps 21 endoporus lower ends, lower end is connected with lower lock ring 23, described lower lock ring 23 is installed between lower lock ring back-up ring 22 and lower contact 24, lower lock ring back-up ring 22 all spins with lower contact 24 and is connected in central tube 6 lower end.Balance sliding sleeve 25 is plugged with at lower contact 24 lower end endoporus, be provided with at balance sliding sleeve 25 endoporus and open convex shoulder 48, balance sliding sleeve 25 is tightly connected with lower contact 24 by the two place's sliding sleeve sealing rings 47 being arranged on lower contact 24 endoporus, and by the locking ball location on lower contact 24 tube wall, the hole wall between lower contact 24 liang place sliding sleeve sealing ring 47 is provided with salvages balance air vent; Lower contact 24 lower end cylindrical is provided with connecting thread, is connected in order to drive joint with other downhole tool pump.
In use, lower contact 24 lower end of this bidirectional bearing blanking plug is connected with the pump being in closed condition and drives joint, throw in down-hole in the input clamping neck 30 that the delivery tool card connected by steel wire inserts in central tube 6 upper end, now, through hole 45 leads to input balance pipe 46, the upper and lower air pressure balance of blanking plug, lower slips holder 15 is fixed in upper slips holder 13 by fusible pin 14 and is in upper end position, to ensure that launch process carries out smoothly, when close to installation site, down-hole, downhole temperature reaches the fusing point of fusible pin 14, and fusible pin 14 fuses, and lower slips holder 15 moves down under gravity, sits card to complete, when reaching required down well placement, on propose input work, lower slips 16 opens the tube wall blocking flow string under lower cone 17 acts on, continuation is carried on delivery tool drive central tube 6 and moving, central tube 6 drives lower contact 24, lower lock ring 23 and lower lock ring back-up ring 22 are moved upward to lower lock ring back-up ring 22 upper surface and contact with the step end face that lock ring overlaps 21 endoporus, and continue drive lower rubber cylinder wedging seat 20 moves, now drop into balance pipe 46 enter between two lock ring cover sealing rings 44 and close, lower rubber cylinder wedging seat 20 is wedged in lower rubber cylinder 18, lower cone 17 also rises thereupon under the guide effect of axial displacement guiding device 12 simultaneously, make lower slips 16 and flow string tube wall card jail, complete lower rubber cylinder 18 to block with setting of lower slips 16, wedging seat clamping step 42 is connected with the clamping of packing element clamping step 39, lower rubber cylinder wedging seat 20 locks the position between central tube 6 by lower lock ring 23, ensure to set the reliable of card, after this, it is made to move down by delivery tool jarring fishing neck cover 1, fishing neck cover 1 drives upper packing element wedging seat 7 to move down by lock ring seat 4, lock ring 5, in the upper packing element 8 of upper packing element wedging seat 7 wedging, upper cone 10 also moves down thereupon under the guide effect of axial displacement guiding device 12 simultaneously, complete packing element 8 to block with setting of upper slips 11, wedging seat clamping step 42 is connected with the clamping of packing element clamping step 39, upper packing element wedging seat 7 locks the position between central tube 6 by lock ring 5, ensures to set the reliable of card, set in the process of card at whole bidirectional bearing blanking plug, upper slips holder 13 and lower slips holder 15 can move axially each other, and last lower slips holder 15 is in upper end position in upper slips holder 13, ensure that upper slips 11 sits the balanced of card power with lower slips 16, to in this LAP of down well placement required by arrival after fusible pin 14 fuses, just in case lower slips 16 touches flow string tube wall, be about to produce between drive lower slips holder 15 and upper slips holder 13 move axially under the frictional force produced between the two and bidirectional bearing blanking plug, make lower slips 16 moves, thus disengage with lower cone 17, lower slips 16 also no longer will contact with flow string tube wall thereupon inwardly shrinking, thus can ensure that blanking plug throws into precalculated position down smoothly, reliably, easily.
When bidirectional bearing blanking plug needs to salvage, the fishing tool that fishing is connected by steel wire carries out, fishing tool first jarring balances the unlatching convex shoulder 48 on sliding sleeve 25, balance sliding sleeve 25 is moved down, open the salvaging balance air vent between two sliding sleeve sealing rings 47, make the upper and lower air pressure balance of blanking plug, again by fishing tool downward jarring solution lock tube 2, shear pin 3 is ruptured, separating lock tube 2 can descendingly guide in the cylindrical hole 28 that enters into by the bellmouth 27 in lock ring 5, each lock watts 31 of composition lock ring 5 is forced to open, lock ring 5 and central tube 6 depart from clamped condition, again by the downward jarring central tube 6 of fishing tool, make central tube 6 by lower contact 24, lower lock ring 23, lock ring cover 21 drives lower rubber cylinder wedging seat 20 to move down and makes lower rubber cylinder 18 deblocking, and make lower joint sleeve 19 drive lower cone 17 to move down by lower rubber cylinder wedging seat 20 by the adapter sleeve convex shoulder 40 on lower joint sleeve 19 to make lower slips 16 unfreezing, the salvaging clamping neck 26 in fishing neck cover 1 is snapped in again afterwards by fishing tool, upwards lift fishing neck cover 1, fishing neck cover 1 is driven on upper packing element wedging seat 7 by lock ring seat 4 and moves, make packing element 8 deblocking, and upper joint sleeve 9 is driven upper cone 10 moves to make upper slips 11 unfreezing by the adapter sleeve convex shoulder 40 on upper joint sleeve 9 by upper packing element wedging seat 7.The fishing tool connected by steel wire after blanking plug deblocking releasing proposes well by fishing neck cover 1 always.
Bidirectional bearing blanking plug of the present invention bears upwarding pressure from mine gas after setting card, when flow string needs to put into production, force pump to drive joint by aboveground high pressure nitrogen to open, in order to ensure that pump leaves joint and opens, the pressure that high pressure nitrogen acts on blanking plug will upward pressure much larger than mine gas, and now this bidirectional bearing blanking plug can bear again the downward pressure from aboveground nitrogen.This bidirectional bearing blanking plug is due to the opposing configuration being provided with upper slips 11 and lower slips 16, corresponding upper packing element 8 and upper packing element wedging seat 7, lower rubber cylinder 18 and lower rubber cylinder wedging seat 20 and other uniqueness, well meet the requirement of bidirectional bearing, and the configuration of fusible pin 14, specific syndeton, lock ring 5 and banding spring 29 between upper slips holder 13 and lower slips holder 15 and the specific syndeton of separating between lock tube 2 and axial displacement guiding device 12 etc. ensure that this bidirectional bearing blanking plug utilizes steel wire instrument to throw in and the carrying out smoothly of the process of salvaging well.
Below detailed description of the invention more of the present invention are only listed, but the present invention is not limited to this, more improvement and conversion can also be made, as as described in lock ring 5 endoporus also can not establish cylindrical hole 28, correspondingly, separate lock tube 2 end and be arranged to the conical surface corresponding with lock ring 5 bellmouth 27, the conical surface separating lock tube 2 end during unblock is plugged in the bellmouth 27 of lock ring 5, and lock ring 5 can be made equally to unlock, described upper slips holder 13 adopts the type of attachment be socketed to be connected with guide groove 37 is movable by dog screw 36 with may not be between lower slips holder 15, but can upper slips holder 13 be socketed on central tube 6 with lower slips holder 15 is opposing, the end face that upper slips holder 13 is relative with lower slips holder 15 arranges guide rod and guide hole respectively, the outer end of guide rod arranges convex shoulder, the aperture of guide hole is provided with stop collar, guide rod is plugged in guide hole through stop collar by convex shoulder, correspondingly, fusible pin 14 set between upper slips holder 13 and lower slips holder 15 can be plugged in upper slips holder 13 and the cylindricality connecting pin on lower slips holder 15 opposing end surface respectively for two ends, the end face that when upper slips holder 13 is connected by the fusible pin of this cylindricality 14 mutually with lower slips holder 15, upper slips holder 13 is relative with lower slips holder 15 liang fits, like this, upper slips holder 13 and lower slips holder 15 can be made equally to be connected by fusible pin 14, and upper slips holder 13 is flexibly connected each other with lower slips holder 15 after fusible pin 14 fuses.And so on, as long as improvement done on general principle basis of the present invention and conversion, all should be considered as falling within the scope of protection of the present invention.
Claims (10)
1. a bidirectional bearing blanking plug, comprise central tube (6), packing element and be sleeved on central tube (6) outward slips, slips is connected in slips support, the overhanging end of slips is connected with cone, it is characterized in that: described slips comprises two groups, one group is upper slips (11), another group is lower slips (16), upper slips (11) and lower slips (16) opposing setting, upper slips (11) and upper slips holder (13) and upper cone (10) is corresponding connects, lower slips (16) and lower slips holder (15) and lower cone (17) is corresponding connects, described upper slips holder (13) is connected with lower slips holder (15), fusible pin (14) is provided with between described lower slips holder (15) and upper slips holder (13), be provided with axial displacement guide position limiter (12) between described upper slips holder (13) and upper cone (10), between lower slips holder (15) and lower cone (17), be provided with axial displacement guide position limiter (12), described packing element comprises packing element (8) and lower rubber cylinder (18), upper packing element (8) is sleeved on upper joint sleeve (9), upper joint sleeve (9) is sleeved on central tube (6), upper joint sleeve (9) lower end and upper cone (10) are connected, upper packing element (8) lower end and upper cone (10) are connected, internal taper hole (38) outer end of upper packing element (8) upper end is provided with packing element clamping step (39), upper joint sleeve (9) is also set with packing element wedging seat (7), upper packing element wedging seat (7) lower end is wedging round table surface (41), wedging round table surface (41) top is provided with wedging seat clamping step (42), wedging seat clamping step (42) can be connected with packing element clamping step (39) in clamping, upper joint sleeve (9) upper end is provided with adapter sleeve convex shoulder (40), described upper packing element wedging seat (7) endoporus is the stepped hole with this adapter sleeve convex shoulder (40) snapping, described lower rubber cylinder (18) is sleeved on lower joint sleeve (19), lower joint sleeve (19) is sleeved on central tube (6), lower joint sleeve (19) upper end and lower cone (17) are connected, lower rubber cylinder (18) upper end and lower cone (17) are connected, internal taper hole (38) outer end of lower rubber cylinder (18) lower end is provided with packing element clamping step (39), lower joint sleeve (19) is also set with lower rubber cylinder wedging seat (20), lower rubber cylinder wedging seat (20) upper end is wedging round table surface (41), wedging round table surface (41) below is provided with wedging seat clamping step (42), wedging seat clamping step (42) can be connected with packing element clamping step (39) in clamping, lower joint sleeve (19) lower end is provided with adapter sleeve convex shoulder (40), described lower rubber cylinder wedging seat (20) endoporus is the stepped hole with this adapter sleeve convex shoulder (40) snapping.
2. bidirectional bearing blanking plug according to claim 1, it is characterized in that: be connected with lock ring (5) in described central tube (6) upper end by unidirectional ratchet, lock ring (5) forms by being in same at least two mortice locks circumferentially watt (31), banding spring (29) is circumferentially provided with at lock ring (5), lock ring (5) upper end endoporus is bellmouth (27), cylindrical hole (28) is provided with between bellmouth (27) and unidirectional ratchet, the diameter A of cylindrical hole (28) is greater than the root diameter B of unidirectional ratchet, described lock ring (5) is arranged in lock ring seat (4), lock ring seat (4) lower end and upper packing element wedging seat (7) are connected, fishing neck cover (1) is fixed with in lock ring seat (4) upper end, be socketed with by shear pin (3) in fishing neck cover (1) and separate lock tube (2), in the pluggable cylindrical hole in lock ring (5) of this solution lock tube (2) (28), when lock ring (5) and central tube (6) are in clamped condition, separate the external diameter C of lock tube (2) lower surface and be in bellmouth (27) in lock ring (5) between outside diameter and end diameter.
3. bidirectional bearing blanking plug according to claim 1, it is characterized in that: on central tube (6), be socketed with lock ring cover (21), lock ring cover (21) is tightly connected with central tube (6) by two places' lock ring cover sealing ring (44) on endoporus, the hole wall of lock ring cover sealing ring (44) below is provided with through hole (45), the upper tube wall corresponding with this through hole (45) position of central tube (6) is provided with the input balance pipe (46) led to this through hole (45), lock ring cover (21) upper end and lower rubber cylinder wedging seat (20) are connected, lock ring cover (21) lower end endoporus is provided with unidirectional ratchet, the unidirectional ratchet place of endoporus lower end, lock ring cover (21) lower end is connected with lower lock ring (23), described lower lock ring (23) is installed between lower lock ring back-up ring (22) and lower contact (24), lower lock ring back-up ring (22) and lower contact (24) are connected in central tube (6) lower end.
4. bidirectional bearing blanking plug according to claim 4, it is characterized in that: be plugged with balance sliding sleeve (25) at lower contact (24) lower end endoporus, be provided with at balance sliding sleeve (25) endoporus and open convex shoulder (48), balance sliding sleeve (25) is tightly connected with lower contact (24) by two places' sliding sleeve sealing ring (47) being arranged on lower contact (24) endoporus, and the hole wall between lower contact (24) two place's sliding sleeve sealing ring (47) is provided with salvages balance air vent.
5. bidirectional bearing blanking plug according to claim 1, it is characterized in that: described upper slips holder (13) lower end is plugged between central tube (6) and lower slips holder (15), upper slips holder (13) lower end cylindrical is provided with guide groove (37) vertically, lower slips holder (15) upper end hole wall arranges pluggable dog screw (36) in this guide groove (37), and upper slips holder (13) is connected with guide groove (37) is movable by dog screw (36) with lower slips holder (15).
6. bidirectional bearing blanking plug according to claim 1, it is characterized in that: described fusible pin (14) is cylindricality pin, fusible pin (14) is plugged on lower slips holder (15) and upper slips holder (13) through the screwed hole on the hole wall of lower slips holder (15) upper end, the outer screwed hole of fusible pin (14) is connected with fusible pin locking screw (43), the tubular member that this is fusible pin locking screw (43) is hollow.
7. bidirectional bearing blanking plug according to claim 1, it is characterized in that: described axial displacement guide position limiter (12) comprises guide rod (35), guide rod (35) one end is provided with connecting thread, guide rod (35) other end is provided with guide rod convex shoulder (33), guide rod (35) in the axial displacement guide position limiter (12) arranged between upper slips holder (13) and upper cone (10) is fixed on upper slips holder (13) upper end by connecting thread, and guide rod convex shoulder (33) is plugged in the guide hole (32) of upper cone (10) lower end; Guide rod (35) in the axial displacement guide position limiter (12) arranged between described lower slips holder (15) and lower cone (17) is fixed on lower slips holder (15) lower end by connecting thread, and guide rod convex shoulder (33) is plugged in the guide hole (32) of lower cone (17) upper end; The aperture of described upper cone (10) lower end guide hole (32) and lower cone (17) upper end guide hole (32) is provided with stop collar (34).
8. bidirectional bearing blanking plug according to claim 1, is characterized in that: internal taper hole (38) the outside diameter D of described upper packing element (8) is less than the outside diameter E of the upper wedging round table surface (41) of packing element wedging seat (7); The outside diameter D of the internal taper hole (38) of described lower rubber cylinder (18) is less than the outside diameter E of the upper wedging round table surface (41) of lower rubber cylinder wedging seat (20).
9. bidirectional bearing blanking plug according to claim 2, is characterized in that: described lock ring (5) is made up of three mortice locks watt (31), and described banding spring (29) is for spiral stretching spring or tube wall having the circular tube shaped spring of subdivision groove.
10. bidirectional bearing blanking plug according to claim 1, is characterized in that: be provided with in the endoporus of described fishing neck cover (1) upper end and salvage clamping neck (26), is provided with and throws in clamping neck (30) in the endoporus of central tube (6) upper end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510693792.XA CN105201446B (en) | 2015-10-24 | 2015-10-24 | Bidirectional bearing blanking plug |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510693792.XA CN105201446B (en) | 2015-10-24 | 2015-10-24 | Bidirectional bearing blanking plug |
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| CN105201446A true CN105201446A (en) | 2015-12-30 |
| CN105201446B CN105201446B (en) | 2017-12-15 |
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| CN201510693792.XA Expired - Fee Related CN105201446B (en) | 2015-10-24 | 2015-10-24 | Bidirectional bearing blanking plug |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107630674A (en) * | 2017-09-29 | 2018-01-26 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of double extruding cup packers of horizontal well water exploration |
| CN108019180A (en) * | 2016-10-31 | 2018-05-11 | 天津汇铸石油设备科技有限公司 | Bidirectional bearing packer |
| CN109798087A (en) * | 2019-03-13 | 2019-05-24 | 荆州市赛瑞能源技术有限公司 | A kind of retrievable hanging packer of double packing elements |
| CN112302586A (en) * | 2020-10-30 | 2021-02-02 | 中国石油天然气股份有限公司 | Production process for putting speed pipe column with choke at tail end into well |
| CN112855066A (en) * | 2021-01-05 | 2021-05-28 | 孙淑芳 | From soluble bridging plug of taking fracturing ball |
| CN113250642A (en) * | 2021-05-25 | 2021-08-13 | 张梦 | Packer for well cementation |
| WO2024017231A1 (en) * | 2022-07-22 | 2024-01-25 | 中国石油化工股份有限公司 | Packer and unsealing method thereof |
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| CN108019180A (en) * | 2016-10-31 | 2018-05-11 | 天津汇铸石油设备科技有限公司 | Bidirectional bearing packer |
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| CN109798087A (en) * | 2019-03-13 | 2019-05-24 | 荆州市赛瑞能源技术有限公司 | A kind of retrievable hanging packer of double packing elements |
| CN109798087B (en) * | 2019-03-13 | 2021-07-16 | 荆州市赛瑞能源技术有限公司 | Removable suspension packer with double rubber cylinders |
| CN112302586A (en) * | 2020-10-30 | 2021-02-02 | 中国石油天然气股份有限公司 | Production process for putting speed pipe column with choke at tail end into well |
| CN112855066A (en) * | 2021-01-05 | 2021-05-28 | 孙淑芳 | From soluble bridging plug of taking fracturing ball |
| CN112855066B (en) * | 2021-01-05 | 2021-09-14 | 大安鸿源管业有限公司 | From soluble bridging plug of taking fracturing ball |
| CN113250642A (en) * | 2021-05-25 | 2021-08-13 | 张梦 | Packer for well cementation |
| WO2024017231A1 (en) * | 2022-07-22 | 2024-01-25 | 中国石油化工股份有限公司 | Packer and unsealing method thereof |
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| CN105201446B (en) | 2017-12-15 |
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