CN105370237A - Blanking plug - Google Patents
Blanking plug Download PDFInfo
- Publication number
- CN105370237A CN105370237A CN201410437805.2A CN201410437805A CN105370237A CN 105370237 A CN105370237 A CN 105370237A CN 201410437805 A CN201410437805 A CN 201410437805A CN 105370237 A CN105370237 A CN 105370237A
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- China
- Prior art keywords
- core bar
- slips
- blanking plug
- coiled tubing
- sealing drum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000007789 sealing Methods 0.000 claims abstract description 77
- 241000239290 Araneae Species 0.000 claims description 23
- 238000012856 packing Methods 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 claims description 5
- 238000004873 anchoring Methods 0.000 claims description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 abstract 5
- 235000017491 Bambusa tulda Nutrition 0.000 abstract 5
- 241001330002 Bambuseae Species 0.000 abstract 5
- 235000015334 Phyllostachys viridis Nutrition 0.000 abstract 5
- 239000011425 bamboo Substances 0.000 abstract 5
- 230000000694 effects Effects 0.000 description 7
- 239000003921 oil Substances 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910001339 C alloy Inorganic materials 0.000 description 1
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 1
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
Landscapes
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention discloses a blanking plug, comprising: the top connection, the core bar, a friction section of thick bamboo, bow-shaped friction disc, locking device, the slip seat, the slips, the taper sleeve, a sealing cylinder, the first end and the top connection of core bar pass through the shear pin and are connected, a friction section of thick bamboo, the slip seat, the slips, the taper sleeve, a sealing cylinder suit is on the core bar in order, a friction section of thick bamboo, the slip seat, the slips is connected in order, the friction disc sets up on the friction section of thick bamboo outer wall, locking device sets up between core bar and a friction section of thick bamboo, the inboard of slips and the outer wall contact cooperation of taper sleeve, the periphery of the second end of core bar evenly is provided with three guide way, a sealing cylinder is provided with threely, three sealing cylinder suit is on the core bar in order, equal fore-and aft is provided with vertical sealing groove on every sealing cylinder. The coiled tubing plugging device is simple in structure and convenient to operate, and when the coiled tubing plugging device is placed underground, the coiled tubing can be plugged.
Description
Technical field
The present invention relates to workover tool field, particularly a kind of blanking plug.
Background technology
Coiled tubing is the tubing made of low-carbon alloy steel, because it is good in property, conventional oil pipe can be replaced to carry out a lot of operation.Use coiled tubing as flow string in the low-pressure gas well water pumping gas production process of current oil field at home, when needs trip out coiled tubing, because downhole oil stressor layer is higher, the pressure in coiled tubing needs compacting, prevents blowout.
When tripping out coiled tubing at present, prevent blowout by kill job, namely pass through to Injection Well liquid in well, the pressure of well liquid fluid column is greater than needs to suppress the pressure of oil reservoir, and oil reservoir is lived by well hydraulic pressure, thus effectively prevents blowout.
Realizing in process of the present invention, inventor finds that prior art at least exists following problem:
Kill job needs special kill-job equipment to realize, and operation is very complicated, and the operation cycle is longer, can not realize the quick reparation of well; And well killing fluid can damage stratum, well yield may be made to reduce, therefore, prior art lacks a kind of specially for the well blowout preventing equipment of coiled tubing.
Summary of the invention
Lacking a kind of special problem for the well blowout preventing equipment of coiled tubing to solve in prior art, embodiments providing a kind of coiled tubing blanking plug.Described technical scheme is as follows:
The invention provides a kind of blanking plug, be arranged on coiled tubing inside, for coiled tubing described in shutoff, described blanking plug comprises: top connection, core bar, friction cylinder, arc friction plate, locking device, slip spider, slips, taper sheath, sealing drum, the first end of described core bar is connected by shear pin with described top connection, described friction cylinder, described slip spider, described slips, described taper sheath, described sealing drum is sleeved on described core bar in turn, and all between the first end and the second end of described core bar, described friction cylinder, described slip spider, described slips connects in turn, described friction plate is arranged on described friction cylinder outer wall, described locking device is arranged between described core bar and described friction cylinder, the inner side of described slips coordinates with the wall contacts of described taper sheath, the external diameter of the second end of described core bar is more than or equal to the external diameter of described sealing drum,
Described sealing drum is provided with three, three described sealing drums are sleeved on described core bar in turn, all longitudinally on each sealing drum be provided with vertical sealed groove, the radial angle of the sealed groove of every two sealing drums is 120 degree, second end of described core bar is back taper, and be evenly provided with three gathering sills at the periphery of the second segment of described core bar, the lower end of each described gathering sill from the lower end of inverted cone-shaped along 45 degree of direction spirals, the upper end of each described gathering sill is parallel to the axis of core bar, and the lower end of the upper end of each described gathering sill and adjacent gathering sill point-blank, the upper end of each described gathering sill and the sealed groove of a described sealing drum are positioned at same straight line,
During work, described top connection pulls described core bar, and described core bar drives described sealing drum, described taper sheath extrudes described slips, makes described slips anchoring on described coiled tubing.
Further, described locking device comprises: the inner ring that size is variable and elastic component, described friction cylinder inwall is provided with inner chamber, what described inner ring was parallel with described core bar is arranged in described inner chamber, described elastic component is arranged between the inwall of described inner ring and described inner chamber, described inner ring, described core bar are provided with pawl button, and the pawl button in described inner ring and the pawl button on described core bar are worked in coordination.
Particularly, described inner ring comprises two semicircular ring fastened mutually.
Particularly, described elastic component is elastic rubber ring.
Further, described blanking plug also comprises elastic circlip, and the periphery of the upper end outer wall of described taper sheath is provided with cannelure, and described elastic circlip is sleeved in described cannelure.
Particularly, described sealing drum is packing element.
Further, the sealed groove on described sealing drum is wide is 1.5mm, is 1.2mm deeply.
Further, described friction plate is provided with three, and on described friction cylinder, correspondence is provided with three flutings, corresponding being fixed in a fluting in upper end of each friction plate, and the lower end of described friction plate is free end.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
Embodiments provide a kind of specially for the blanking plug of coiled tubing, by when entering in coiled tubing under the present invention, arc friction plate is close to tube inner wall and is produced larger frictional force with oil pipe under the effect of elastic force, and friction cylinder, slip spider and coiled tubing inwall are fixed; On put on joint and drive on core bar and move, make sealing drum by the compand of core bar second end, realize the sealing to coiled tubing; Sealing drum extruding taper puts row and struts slips, make slips anchoring on the inwall of coiled tubing, and core bar is locked, device locking, guarantees that the present invention can be stabilized in coiled tubing in blocking process, thus sealing blocking is carried out to coiled tubing, effectively prevent blowout; Structure of the present invention is simple, and easy to operate, fast blocking when can realize tripping out coiled tubing is also repaired, and can't impact well;
In addition, there is a vertical protruding weld seam in the inwall of coiled tubing, the embodiment of the present invention coordinates with weld seam by being provided with gathering sill at the second end of core bar, when the upper end of gathering sill is corresponding with weld seam engage time, a sealed groove must be had to engage with weld seam, sealing drum by compand thus realize the perfection of coiled tubing is sealed, do not affect by weld seam, simple to operate, and sealing effectiveness improves greatly.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the plug structure schematic diagram that the embodiment of the present invention provides;
Fig. 2 is the blanking plug partial schematic diagram that the embodiment of the present invention provides;
Fig. 3 is that two semicircular ring that the embodiment of the present invention provides fasten some open mode schematic diagram;
Fig. 4 is that two semicircular ring that the embodiment of the present invention provides fasten some buckling state schematic diagram;
Fig. 5 is the sectional drawing of the second end of the core bar that the embodiment of the present invention provides;
Fig. 6 is the structural representation of the sealing drum that the embodiment of the present invention provides;
Wherein: 1 top connection, 2 shear pins, 3 core bars, 31 gathering sills, 4 friction cylinders, 5 friction plates, 6 locking devices, 61 inner ring, 611 semicircular ring, 62 elastic components, 7 slip spiders, 8 elastic circlips, 9 slips, 10 taper sheaths, 11 sealing drums, 111 sealed grooves.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Embodiment one
As shown in Figure 1, also can see Fig. 5, Fig. 6, embodiments provide a kind of blanking plug, be arranged on coiled tubing inside, for shutoff coiled tubing, blanking plug comprises: top connection 1, core bar 3, friction cylinder 4, arc friction plate 5, locking device 6, slip spider 7, slips 9, taper sheath 10, sealing drum 11, the first end of core bar 3 is connected by shear pin 2 with top connection 1, friction cylinder 4, slip spider 7, slips 9, taper sheath 10, sealing drum 11 is sleeved on core bar 3 in turn, and all between the first end and the second end of core bar 3, friction cylinder 4, slip spider 7, slips 9 connects in turn, friction plate 5 is arranged on friction cylinder 4 outer wall, locking device 6 is arranged between core bar 3 and friction cylinder 4, the inner side of slips 9 coordinates with the wall contacts of taper sheath 10, the external diameter of the second end of core bar 3 is more than or equal to the external diameter of sealing drum 11, sealing drum 11 is provided with three, three sealing drums 11 are sleeved on core bar 3 in turn, all longitudinally on each sealing drum 11 be provided with vertical sealed groove 111, the radial angle of the sealed groove 111 of every two sealing drums 11 is 120 degree, second end of core bar 3 be back taper, and be evenly provided with three gathering sills 31 at the periphery of the second end of described core bar 3, the lower end of each gathering sill 31 from the lower end of inverted cone-shaped along 45 degree of direction spirals, the upper end of each gathering sill 31 is parallel to the axis of core bar 3, and the lower end of the upper end of each described gathering sill 31 and adjacent gathering sill 31 point-blank, the upper end of each gathering sill 31 and the sealed groove 111 of a sealing drum 11 are positioned at same straight line, during work, top connection 1 pulls core bar 3, and core bar 3 drives sealing drum 11, taper sheath 10 extrudes slips 9, and slips 9 is anchored on coiled tubing.
The lower end of top connection 1 has groove, and two screwed holes are circumferentially provided with symmetrically on the sidewall of this groove, the first end of core bar 3 inserts in the groove of top connection 1 lower end, and the first end of core bar 3 has cannelure, core bar 3 can be rotated relative to top connection 1, shear pin 2 is connected core bar 3 and top connection 1 through screwed hole successively with cannelure, friction cylinder 4, slip spider 7, slips 9, taper sheath 10, sealing drum 11 is sleeved on core bar 3 from top to bottom successively, the lower end of friction cylinder 4 is fixedly connected with the upper end of slip spider 7, slips 9 upper end is flexibly connected with the outward flange of slip spider 7 lower end, ensure that slips 9 can open around tie point, the inner surface of slips 9 lower end and the external surface of taper sheath 10 are fitted, sealing drum 11 is positioned at below taper sheath 10, and above the second end being positioned at core bar 3.
Wherein, the inwall of coiled tubing exists a vertical protruding weld seam, this is that the structure of coiled tubing itself causes, the existence of this protruding weld seam affects the seal degree of the blanking plug of coiled tubing inside always, often because protruding weld seam makes corresponding blanking plug poorly sealed to this coiled tubing;
When using the embodiment of the present invention to go into the well, the upper end of top connection 1 is connected with the lower end of sucker rod, sucker rod is lowered into the coiled tubing upper end needing to trip out with the blanking plug that the embodiment of the present invention provides, when the second end of core bar 3 enters in coiled tubing, certain point of gathering sill 31 lower end that must have of the periphery of the second end of core bar 3 docks with the weld seam of coiled tubing inwall, because this gathering sill 31 is that screw extends, entirety of the present invention is forced to rotate so sucker rod continues lower guild, until the weld seam of the upper end of gathering sill 31 and coiled tubing inwall is to when connecting, namely the upper end of gathering sill 31 and weld seam are all vertical, the present invention can continue descending,
Sucker rod continues descending (if can not be descending smoothly, the weighted lever of certain length should be connected) in top connection 1, after arriving precalculated position, sucker rod stops descending, being close to coiled tubing inwall and producing larger frictional force with coiled tubing under the effect of elastic force of arc friction plate 5, make friction cylinder 4 stop motion, be fixedly connected with friction cylinder 4 slip spider 7 also motionless, slips 9 is in retracted state.Now, sucker rod is carried with in less power, friction cylinder 4 and friction plate 5, slip spider 7 is not all moved, second end band movable sealing cylinder 11 of core bar 3 and taper sheath 10 up, slips 9 is strutted by taper sheath 10 and is anchored on coiled tubing inwall, now, sucker rod is carried in continuation, vertical sealed groove 111 is provided with due to all longitudinal on three sealing drums 11, the sealed groove 111 of each sealing drum 11 and the upper end of a gathering sill 31 are located on the same line, namely three sealed grooves 111 are corresponding with the upper end of three gathering sills 31 respectively, and be positioned on a vertical curve, therefore when the guide function of gathering sill 31 finishing device of the second end of core bar 3, the weld seam of a sealed groove 111 and coiled tubing inwall must be had to connecting in three sealing drums 11,
Now, sealing drum 11 is realized the sealing to coiled tubing by the second end compand of core bar 3, due to the existence of sealed groove 111, sealing drum 11 can be sealed with the perfection of coiled tubing inwall, this is that general blanking plug cannot be accomplished, and the embodiment of the present invention arranges the sealed groove 111 that three angles are 120 degree, the maximum anglec of rotation of the present invention can be made to be no more than 120 degree, can perfectly seal, in practical operation, the rotation of blanking plug in coiled tubing is very difficult, so be arranged so that the present invention simplifies operation easier to a certain extent, and sealing effectiveness improves greatly,
And core bar 3 is locked, device 6 is locked, sucker rod is carried in continuation, after reaching certain pulling force, shear pin 2 is cut off by top connection 1 pulling force upwards and the downward pulling force acting in conjunction of core bar 3, sucker rod can propose, the blanking plug that the embodiment of the present invention provides continues to stay shutoff coiled tubing in coiled tubing, realizes perfect sealing, and can not eject well liquid or oils in coiled tubing; Structure of the present invention is simple, easy to operate, when the present invention is placed in coiled tubing, and snubbing serving when can realize tripping out coiled tubing.
Embodiment two
As shown in Figure 1, the invention provides a kind of blanking plug, be arranged on coiled tubing inside, for shutoff coiled tubing, described blanking plug comprises: top connection 1, core bar 3, friction cylinder 4, arc friction plate 5, locking device 6, slip spider 7, slips 9, taper sheath 10, sealing drum 11, the first end of core bar 3 is connected by shear pin 2 with top connection 1, friction cylinder 4, slip spider 7, slips 9, taper sheath 10, sealing drum 11 is sleeved on core bar 3 in turn, and all between the first end and the second end of core bar 3, friction cylinder 4, slip spider 7, slips 9 connects in turn, friction plate 5 is arranged on friction cylinder 4 outer wall, locking device 6 is arranged between core bar 3 and friction cylinder 4, the inner side of slips 9 coordinates with the wall contacts of taper sheath 10, the external diameter of the second end of core bar 3 is more than or equal to the external diameter of sealing drum 11, sealing drum 11 is provided with three, three sealing drums 11 are sleeved on core bar 3 in turn, all longitudinally on each sealing drum 11 be provided with vertical sealed groove 111, the radial angle of the sealed groove 111 of every two sealing drums 11 is 120 degree, second end of core bar 3 is back taper, and be evenly provided with three gathering sills 31 at the periphery of the second end of described core bar 3, the lower end of each gathering sill 31 from the lower end of back taper along 45 degree of direction spirals, the upper end of each gathering sill 31 is parallel to the axis of core bar 3, and the lower end of the upper end of each described gathering sill 31 and adjacent gathering sill 31 point-blank, the upper end of each gathering sill 31 and the sealed groove 111 of a sealing drum 11 are positioned at same straight line, during work, top connection 1 pulls core bar 3, and core bar 3 drives sealing drum 11, taper sheath 10 extrudes slips 9, and slips 9 is anchored on coiled tubing.
As shown in Figure 2, in embodiments of the present invention, locking device 6 comprises: inner ring 61, elastic component 62 that size is variable, friction cylinder 4 inwall is provided with inner chamber, inner ring 61 setting parallel with core bar 3 in the lumen, elastic component 62 is arranged between inner ring 61 and the inwall of inner chamber, and inner ring 61, core bar 3 are provided with pawl button, and the pawl button in inner ring 61 and the pawl button on core bar 3 are worked in coordination.
Wherein, in embodiments of the present invention, elastic component 62 is provided with between the inner chamber of friction cylinder 4 and inner ring 61, fit with the inwall of the inner chamber of friction cylinder 4 respectively in the two ends up and down of inner ring 61, and the inner side of inner ring 61 is provided with pawl button, can engage with the pawl button on core bar 3, when the power that core bar 3 is upwards acted on, core bar 3 moves, a frictional force is obliquely applied to inner ring 61, this frictional force passes to friction cylinder 4 inner chamber along the component of core bar 3 axis by inner ring 61 and bears, component along core bar 3 radial direction acts on elastic component 62 by inner ring 61, elastic component 62 is expanded, inner ring 61 retreats relative to core bar 3, inner ring 61 becomes large, when the tooth peak of the pawl button of core bar 3 coordinates with the tooth peak of the pawl button of inner ring 61, inner ring 61 is maximum, now, core bar 3 continues up, and under the elastic force effect of elastic component 62, inner ring 61 is advanced relative to core bar 3, and inner ring 61 diminishes, and when the tooth peak of the pawl button of core bar 3 is with when coordinating at the bottom of the tooth of the pawl button of inner ring 61, inner ring 61 is minimum.Namely when core bar 3 is subject to power upwards, by the elastic force effect of elastic component 62, make inner ring 61 retreat relative to core bar 3 or advance, thus make core bar 3 stepping moves.
And when core bar 3 is subject to downward active force and the pawl button of core bar 3 engages with the pawl button of inner ring 61, due to the elastic force effect of elastic component 62, inner ring 61 can not retreat by core bar 3 relatively, and core bar 3 can not move downward because of the space do not moved down, and core bar 3 is locked.Design like this, be in order to ensure blanking plug is put into coiled tubing block time, core bar 3 is locked at fixing position, avoids core bar 3 to be separated with friction cylinder 4, slip spider 7, slips 9 because of the Action of Gravity Field of taper sheath 10, sealing drum 11 and core bar 3 self, cause blocking to be lost efficacy.
As shown in Figure 3, also can see Fig. 4, in embodiments of the present invention, inner ring 61 comprises two semicircular ring 611 fastened mutually.When core bar 3 moves, two semicircular ring 611 are subject to the active force of core bar 3 and compression elastic piece 62, and elastic component 62 is expanded, and two semicircular ring 611 respectively relative core bar 3 retreat, thus the fastening point of two semicircular ring 611 is opened, and provides space for core bar 3 moves; When core bar 3 is subject to downward power for past moving down, due to the elastic force effect of elastic component 62, and the interaction of the pawl button in semicircular ring 611 and the pawl button on core bar 3, two semicircular ring 611 closely fasten, core bar 3 is engaged, prevent core bar 3 from moving down, namely fastened the folding of point by two semicircular ring 611, the stepping realizing core bar 3 moves.
As shown in Figure 2, in embodiments of the present invention, elastic component 62 is elastic rubber ring.Wherein, elastic caoutchouc hoop, in two semicircular ring 611, moves along with on core bar 3, and the relative core bar 3 of semicircular ring 611 advances or core bar 3 retreats relatively, and elastic rubber ring shrinks or expansion.Alternatively, in embodiments of the present invention, elastic rubber ring also can be ring-spring etc.
As shown in Figure 1, in embodiments of the present invention, blanking plug also comprises elastic circlip 8, and the periphery of the upper end outer wall of taper sheath 10 is provided with cannelure, and elastic circlip 8 is sleeved in cannelure.Elastic circlip 8 is the annulus made with spring steel material, is placed in the cannelure of cone upper end, shifts out for limiting slips 9 circumference.Alternatively, in embodiments of the present invention, elastic circlip 8 also can be designed to the ring with certain opening, when it and slips 9 occurs to interact time, its aperture variable is large or reduce.
As shown in Figure 6, also can see Fig. 1, in embodiments of the present invention, sealing drum 11 is packing element, because packing element is cheap, sealing better, easily obtains, alternatively, sealing drum 11 also can be other cylinders having elasticity, have the material of sealing function to make.
As shown in Figure 6, in embodiments of the present invention, the sealed groove 111 on sealing drum 11 is wide is 1.5mm, is 1.2mm deeply.The inwall of coiled tubing has the weld seam of one rule, when sealing with common sealing drum, the protruding commissure of coiled tubing can not seal completely, can not play the effect of perfect blocking.Inventor finds through experiment, and when selecting packing element, wide is 1.5mm, and the dark sealed groove 111 for 1.2mm can be played sealing effectiveness well to the weld seam of coiled tubing at packing element by when compand.Certainly, different according to the material of sealing drum 11, sealing drum 11 is different by the deformation coefficient possibility along all directions in the process of compand, and those skilled in the art can design the size of sealed groove 111 in the process of production and processing according to the material of the sealing drum 11 selected.
As shown in Figure 1, in embodiments of the present invention, friction plate 5 is provided with three, and on friction cylinder 4, correspondence is provided with three flutings, corresponding being fixed in a fluting in upper end of each friction plate 5, and the lower end of friction plate 5 is free end.Wherein, three flutings on friction cylinder 4 are uniformly distributed circumferentially, and the shape of friction plate 5 is arc, and the free end of friction plate 5 can move along the wall of the fluting of friction cylinder 4.When entering in coiled tubing under blanking plug, the external surface of friction plate 5 is subject to the elastic force of coiled tubing inwall, and the friction plate 5 that inwardly extruding is arc, the free end of friction plate 5 moves down.The design of friction cylinder 4 need ensure when the free end of friction plate 5 arrives the lowermost end of fluting, friction cylinder 4 and friction plate 5 can enter coiled tubing inside under force, and friction plate 5 need be greater than the gravity of friction plate 5, friction cylinder 4, slip spider 7, slips 9 and locking device 6 with the frictional force of coiled tubing inwall.Design like this, can ensure that, when slips 9 is not anchored on tube inner wall, friction cylinder 4, slip spider 7, slips 9 and locking device 6 all keep motionless, even and if less power is upwards applied to core bar 3, friction cylinder 4, slip spider 7 and slips 9 still can be kept motionless.In embodiments of the present invention, due to the rotation of core bar 3 during guiding, three friction plates 5 and three slips 9 should avoid the position of core bar 3 gathering sill 31.
These are only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a blanking plug, be arranged on coiled tubing inside, for coiled tubing described in shutoff, it is characterized in that, described blanking plug comprises: top connection, core bar, friction cylinder, arc friction plate, locking device, slip spider, slips, taper sheath, sealing drum, the first end of described core bar is connected by shear pin with described top connection, described friction cylinder, described slip spider, described slips, described taper sheath, described sealing drum is sleeved on described core bar in turn, and all between the first end and the second end of described core bar, described friction cylinder, described slip spider, described slips connects in turn, described friction plate is arranged on described friction cylinder outer wall, described locking device is arranged between described core bar and described friction cylinder, the inner side of described slips coordinates with the wall contacts of described taper sheath, the external diameter of the second end of described core bar is more than or equal to the external diameter of described sealing drum,
Described sealing drum is provided with three, three described sealing drums are sleeved on described core bar in turn, all longitudinally on each sealing drum be provided with vertical sealed groove, the radial angle of the sealed groove of every two sealing drums is 120 degree, second end of described core bar is back taper, three gathering sills are evenly provided with at the periphery of the second end of described core bar, the lower end of each described gathering sill from the lower end of back taper along 45 degree of direction spirals, the upper end of each described gathering sill is parallel to the axis of core bar, and the lower end of the upper end of each described gathering sill and adjacent gathering sill point-blank, the upper end of each described gathering sill and the sealed groove of a described sealing drum are positioned at same straight line,
During work, described top connection pulls described core bar, and described core bar drives described sealing drum, described taper sheath extrudes described slips, makes described slips anchoring on described coiled tubing.
2. blanking plug according to claim 1, it is characterized in that, described locking device comprises: the inner ring that size is variable and elastic component, described friction cylinder inwall is provided with inner chamber, what described inner ring was parallel with described core bar is arranged in described inner chamber, described elastic component is arranged between the inwall of described inner ring and described inner chamber, and described inner ring, described core bar are provided with pawl button, and the pawl button in described inner ring and the pawl button on described core bar are worked in coordination.
3. blanking plug according to claim 2, is characterized in that, described inner ring comprises two semicircular ring fastened mutually.
4. blanking plug according to claim 3, is characterized in that, described elastic component is elastic rubber ring.
5. blanking plug according to claim 1, is characterized in that, described blanking plug also comprises elastic circlip, and the periphery of the upper end outer wall of described taper sheath is provided with cannelure, and described elastic circlip is sleeved in described cannelure.
6. blanking plug according to claim 1, is characterized in that, described sealing drum is packing element.
7. blanking plug according to claim 6, is characterized in that, the sealed groove on described sealing drum is wide is 1.5mm, is 1.2mm deeply.
8. blanking plug according to claim 1, it is characterized in that, described friction plate is provided with three, and on described friction cylinder, correspondence is provided with three flutings, corresponding being fixed in a fluting in upper end of each friction plate, and the lower end of described friction plate is free end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410437805.2A CN105370237B (en) | 2014-08-29 | 2014-08-29 | Blanking plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410437805.2A CN105370237B (en) | 2014-08-29 | 2014-08-29 | Blanking plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105370237A true CN105370237A (en) | 2016-03-02 |
| CN105370237B CN105370237B (en) | 2018-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410437805.2A Active CN105370237B (en) | 2014-08-29 | 2014-08-29 | Blanking plug |
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| Country | Link |
|---|---|
| CN (1) | CN105370237B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109025891A (en) * | 2018-10-16 | 2018-12-18 | 新疆恒智伟业石油工程技术开发有限公司 | A kind of coal mine directed drilling drilling tool hole sealing device |
| CN112227997A (en) * | 2020-11-17 | 2021-01-15 | 刘希明 | Coal bed gas pressurized well repairing device and well repairing method |
| CN115749666A (en) * | 2022-11-01 | 2023-03-07 | 四川圣诺油气工程技术服务有限公司 | Underground ratchet type blanking plug |
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| CN85203350U (en) * | 1985-07-29 | 1986-10-08 | 辽河石油勘探局科学技术研究院 | Oil production pipe blockup tool |
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| CN202300300U (en) * | 2011-09-26 | 2012-07-04 | 通化市前进石油机械有限公司 | Two-way mechanical blanking plug |
| CN202510084U (en) * | 2012-01-16 | 2012-10-31 | 钟立国 | High-pressure well blanking plug |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109025891A (en) * | 2018-10-16 | 2018-12-18 | 新疆恒智伟业石油工程技术开发有限公司 | A kind of coal mine directed drilling drilling tool hole sealing device |
| CN109025891B (en) * | 2018-10-16 | 2023-10-10 | 新疆恒智伟业石油工程技术开发有限公司 | Drilling tool hole sealing device for directional drilling of coal mine |
| CN112227997A (en) * | 2020-11-17 | 2021-01-15 | 刘希明 | Coal bed gas pressurized well repairing device and well repairing method |
| CN115749666A (en) * | 2022-11-01 | 2023-03-07 | 四川圣诺油气工程技术服务有限公司 | Underground ratchet type blanking plug |
| CN115749666B (en) * | 2022-11-01 | 2023-04-07 | 四川圣诺油气工程技术服务有限公司 | Underground ratchet type blanking plug |
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