CN103696715A - Anchoring structure and underground blocking device - Google Patents
Anchoring structure and underground blocking device Download PDFInfo
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- CN103696715A CN103696715A CN201410004732.8A CN201410004732A CN103696715A CN 103696715 A CN103696715 A CN 103696715A CN 201410004732 A CN201410004732 A CN 201410004732A CN 103696715 A CN103696715 A CN 103696715A
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- anchor
- lock nut
- central tube
- blocking device
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Abstract
The invention discloses an anchoring structure. The anchoring structure comprises an upper anchoring assembly and a lower anchoring assembly which are arranged on a center tube; the upper anchoring assembly comprises an upper locking nut in threaded connection with the upper end of the center tube, an ejector ring in contact with the upper locking nut, a plurality of slips in the contact with the ejector rings, and a slip conical support in the contact with the slips; the lower anchoring assembly comprises a lower locking nut in the threaded connection with the lower end of the center tube, a plurality of slips in the contact with the lower locking nut, and a slip conical support in the contact with the slips; the anchoring structure further comprises a journey pressure compensation device which is arranged on the slips and can be compressed and can provide a pressure for the slips. The invention further discloses an underground blocking device. The anchoring structure and the underground blocking device have the advantages that an underground blocking device is fixedly and firmly mounted in a well; the slip conical supports are difficult to damage; the slips are difficult to damage and the efficacy of the slips are difficult to lose; the requirement on the intensity of the center tube in the underground blocking device is low.
Description
Technical field
The present invention relates to oil gas and mineral mining field, relate in particular to a kind of anchoring structure and down-hole blocking device.
Background technology
In oil gas or mineral mining process, need to carry out shutoff to hoistway.Current down-hole plugging adopts blocking device to carry out conventionally.Existing blocking device comprises central tube and is arranged at anchoring structure and the hermetically-sealed construction on central tube.Blocking device is dropped into behind precalculated position, down-hole, by extruding, anchoring structure is anchored into and in the borehole wall, realize the fixing of blocking device, thereby anchoring structure extruded sealing structure makes hermetically-sealed construction allow hermetically-sealed construction be close to the borehole wall to realize sealing expanding in the radial direction simultaneously.
But it is fixing not firm that existing down-hole blocking device exists in hoistway, the holder of slips cone easily damages, and slips easily damages and lost efficacy and central tube tensile strength is required to high problem.
Summary of the invention
Object of the present invention is to overcome the deficiencies in the prior art, provide a kind of can make down-hole stop up to be contained in fixed in hoistway, the holder of slips cone is not fragile, the not fragile inefficacy of slips and central tube tensile strength that down-hole is stopped up in dress require low anchoring structure.
Another object of the present invention is to provide that the holder of a kind of fixed in hoistway, slips cone is not fragile, the not fragile inefficacy of slips and the down-hole blocking device low to central tube requirement of strength.
Object of the present invention is achieved through the following technical solutions:
An anchoring structure, comprises for being arranged at upper anchor and the lower anchor on central tube; Upper anchor comprises the upper lock nut being connected with the connecting thread of central tube upper end, with the apical ring that upper lock nut contacts, and a plurality of slips that contact with apical ring, the holder of the slips contacting with slips cone; Lower anchor comprises the lower lock nut being connected with the connecting thread of central tube lower end, the slips that a plurality of and lower lock nut contacts, the holder of the slips contacting with slips cone; Also comprise be arranged on slips can be compressed and provide the stroke pressure compensator of pressure for slips.
Inventor finds by research:
1. why existing down-hole blocking device in hoistway, to fix illusive situation, is to be positioned at undergroundly due to access, and it faces complicated geological condition, and the situation that can unavoidably cause hoistway to lose circle occurs.In the situation that hoistway loses circle, by extruding, can only there is the slips of minority to anchor in the borehole wall, the slips anchoring in the borehole wall will stop the motion of apical ring or lower lock nut, make apical ring or lower lock nut cannot continue extruding and do not snap in the slips in the borehole wall, thereby cause part slips cannot anchor in the borehole wall, affect down-hole blocking device fixing stability in the borehole wall.
Simultaneously, in this case, the power of apical ring or lower lock nut is passed to the holder of slips cone by the slips by anchoring in the borehole wall, this causes slips cone holder unbalance stress, the power of apical ring or lower lock nut is by a few point acting in the holder of slips cone, make the stress point in the holder of slips cone stressed excessive, very easily cause the holder of slips cone damaged.
2. why exist slips easily to damage to lose efficacy be due to, at slips, anchor into after the borehole wall, the power of apical ring or lower lock nut is passed to the holder of slips cone by slips, by the toss of slips cone, be handed to seal assembly again, in this process, slips is directly stressed, to cause tooth and the borehole wall on slips to rub, cause slips to damage.
Why to central tube tensile strength require height be due to, the power of apical ring or lower lock nut is passed to the holder of slips cone by slips, by the toss of slips cone, be handed to seal assembly again, the contact surface of slips and the holder of slips cone is inclined-plane, so the power of apical ring or lower lock nut will have major part to be decomposed to the radial direction of central tube.For example, the pressure that seal assembly need to be applied in 49KN just can make it be close to and on tube wall, complete sealing, if from apical ring or the power of lock nut transmission be decomposed, to make so seal assembly be subject to the pressure of 49KN, requirement from apical ring or the power of lock nut transmission reach 196KN left and right, this just causes the suffered pulling force of central tube is 196KN left and right, is far longer than seal assembly pressure.This tensile strength to central tube has proposed higher requirement, and therefore, existing down-hole blocking device is in order to guarantee the intensity of central tube, its inner wall thickness is larger, and this causes under same diameter, and the endoporus aperture of central tube is less, the flow of hoistway is affected, the yielding poorly of oil gas and mineral.
In order to address the above problem, inventor arranges stroke pressure compensator on slips, and its effect is as follows:
1. in the situation that hoistway loses circle, by extruding, can only there is the slips of minority to anchor in the borehole wall, but owing to being provided with stroke pressure compensator, make apical ring or lower lock nut can continue compression and anchor into the stroke pressure compensator on the slips in the borehole wall, thereby make apical ring or lower lock nut by the stroke pressure compensator compression on remaining slips, the pressure that stroke pressure compensator produces anchors into residue slips in the borehole wall, has solved the problem that down-hole blocking device cannot be fixed in losing circle hoistway.
Further, all slips anchor into after the borehole wall, and the power of apical ring or lower lock nut will be passed to the holder of slips cone by all slips, and the holder of slips cone is stressed evenly, can not cause the holder of slips cone damaged.
2. at slips, anchor into after the borehole wall, apical ring or lower lock nut can continue to compress the stroke pressure compensator on slips, the bottom of apical ring or lower lock nut is contacted with the bottom of slips cone holder, the power of apical ring or lower lock nut will directly be passed in the holder of slips cone thus, slips is directly not stressed during this time, avoided tooth and the borehole wall on slips to rub, slips can not damage.
3. at slips, anchor into after the borehole wall, apical ring or lower lock nut can continue to compress the stroke pressure compensator on slips, the bottom of apical ring or lower lock nut is contacted with the bottom of slips cone holder, the power of apical ring or lower lock nut will directly be passed in the holder of slips cone thus, power during this time will not transmitted by slips, the power of apical ring or lower lock nut, by propagating in the direction parallel with central tube axis, can not be decomposed.For example, the pressure that seal assembly need to be applied in 49KN just can make it be close to and on tube wall, complete sealing, so under said structure, due to from apical ring or the power of lock nut transmission be directly passed in the holder of slips cone, so from apical ring or the power of lock nut transmission reach 49KN and can make seal assembly be close on tube wall, the suffered pulling force of central tube also reduces greatly, is only 49KN.This makes under same diameter, and the endoporus aperture of central tube can access expansion, thereby greatly increases hoistway flow, improves the output of oil gas and mineral.
Further, described stroke pressure compensator is elasticity slips seat ring, spring or level pressure plunger valve; On described, in anchor, elasticity slips seat ring, spring or level pressure plunger valve are arranged between described apical ring and described slips; In described lower anchor, elasticity slips seat ring, spring or level pressure plunger valve are arranged between described lower lock nut and described slips.
Further, described stroke pressure compensator is slips pad; Slips pad is arranged at the bottom of described slips and contacts with the holder of described slips cone.
Further, described stroke pressure compensator is the elastic layer of the described slips of parcel.
At down-hole blocking device in the process that throw in down-hole, the foreign matter in hoistway very easily with slips on tooth contact slips is taken out of, thereby occur settingly midway, down-hole blocking device cannot be thrown in to precalculated position.
In order to address this problem, adopt the elastic layer of parcel slips as stroke pressure compensator, can protect slips, prevent that foreign matter from taking slips out of by the tooth on slips, solve in the process that down-hole blocking device throws in down-hole and occurred setting problem midway.
Further, the protective jacket that also comprises the described upper anchor of parcel and described lower anchor.
Protective jacket can prevent that foreign material from entering anchor and lower anchor, can effectively avoid the problem of the upper anchor of foreign material impact and lower anchor work.When setting, slips can anchor in the borehole wall after protective jacket is crushed.
Another object of the present invention is achieved through the following technical solutions:
Down-hole blocking device, comprises central tube, is arranged at the seal assembly on central tube, is arranged on central tube and lays respectively at upper anchor and the lower anchor of seal assembly top and bottom; Upper anchor comprises the upper lock nut being threaded with central tube upper end, with the apical ring that upper lock nut contacts, and a plurality of slips that contact with apical ring, the holder of the slips contacting with slips cone; Lower anchor comprises the lower lock nut being threaded with central tube lower end, the slips that a plurality of and lower lock nut contacts, the holder of the slips contacting with slips cone; Also comprise be arranged on slips can be compressed and provide the stroke pressure compensator of pressure for slips.
Further, described stroke pressure compensator is elasticity slips seat ring, spring or level pressure plunger valve; On described, in anchor, elasticity slips seat ring, spring or level pressure plunger valve are arranged between described apical ring and described slips; In described lower anchor, elasticity slips seat ring, spring or level pressure plunger valve are arranged between described lower lock nut and described slips.
Further, described stroke pressure compensator is slips pad; Slips pad is arranged at the bottom of described slips and contacts with the holder of described slips cone.
Further, described stroke pressure compensator is the elastic layer of the described slips of parcel.
Further, the protective jacket that also comprises the described upper anchor of parcel and described lower anchor.
In sum, advantage of the present invention and beneficial effect are:
1. stroke pressure compensator is set, has solved in the situation that hoistway loses circle, part slips cannot anchor into the problem of the borehole wall, and what make that down-hole blocking device can be more firm is fixed in hoistway, can prevent that the holder of slips cone from being damaged by pressure simultaneously;
2. stroke pressure compensator is set, has avoided tooth and the borehole wall on slips to rub, slips can not damage;
3. stroke pressure compensator is set, in the situation that realizing sealing, make the suffered pulling force of central tube less, thereby under same diameter, the endoporus aperture of central tube can accesses expansion, thereby greatly increase hoistway flow, improve the output of oil gas and mineral;
4. adopt the elastic layer of parcel slips as stroke pressure compensator, can protect slips, prevent that foreign matter from taking slips out of by the tooth on slips, solved in the process that down-hole blocking device throws in down-hole and occurred setting problem midway;
5. protective jacket is set, can prevents that foreign material from entering anchor and lower anchor, can effectively avoid the problem of the upper anchor of foreign material impact and lower anchor work.
Accompanying drawing explanation
In order to be illustrated more clearly in embodiments of the invention, will be briefly described describing the required accompanying drawing of using in the embodiment of the present invention below.Apparent, the accompanying drawing in the following describes is only some embodiment that record in the present invention, for a person skilled in the art, in the situation that not paying creative work, can also, according to accompanying drawing below, obtain other accompanying drawing.
Fig. 1 is the structural representation of upper anchor the first embodiment;
Fig. 2 is the cross-sectional view of upper anchor the first embodiment;
Fig. 3 is the structural representation of lower anchor the first embodiment;
Fig. 4 is the cross-sectional view of lower anchor the first embodiment;
Fig. 5 is the structural representation of the second embodiment of upper anchor;
Fig. 6 is the structural representation of the second embodiment of lower anchor;
Fig. 7 is the structural representation of the third embodiment of upper anchor;
Fig. 8 is the structural representation of the third embodiment of lower anchor;
Fig. 9 is the structural representation of down-hole blocking device;
Figure 10 is the setting state diagram of down-hole blocking device;
Figure 11 is the A place enlarged drawing of Figure 10;
Figure 12 is the structural representation of upper lock nut;
Figure 13 is the structural representation of lower lock nut;
Figure 14 is the structural representation of apical ring;
Figure 15 is the structural representation of slips;
Figure 16 is the structural representation of slips cone holder;
Wherein, the component title that Reference numeral is corresponding is as follows:
1-central tube, the upper lock nut of 2-, 3-apical ring, 4-slips, the holder of 5-slips cone, packing element in 6-, 7-holds packing element, lock nut under 8-, 9-elasticity slips seat ring, 10-slips pad, 11-elastic layer, 12-protective jacket, 13-spring, the 14-bar of giving up, the 15-borehole wall, 31-taper surface, 32-separates projection, 51-taper surface, and 52-separates projection, 81-taper surface, 82-separates projection, 101-opening.
The specific embodiment
In order to make those skilled in the art understand better the present invention, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out to clear, complete description.Apparent, embodiment described below is only the part in the embodiment of the present invention, rather than all.The embodiment recording based on the present invention, other all embodiment that those skilled in the art obtain in the situation that not paying creative work, all in the scope of protection of the invention.
Embodiment 1:
As shown in Fig. 1 ~ Fig. 8, a kind of anchoring structure, comprises for being arranged at upper anchor and the lower anchor on central tube 1; Upper anchor comprises the upper lock nut 2 being connected with the connecting thread 101 of central tube 1 upper end, with the apical ring 3 that upper lock nut 2 contacts, and a plurality of slips 4 that contact with apical ring 3, the slips contacting with slips 4 cone holder 5; Lower anchor comprises the lower lock nut 8 being connected with the connecting thread 101 of central tube 1 lower end, the slips 4 that a plurality of and lower lock nut 8 contacts, the slips contacting with slips 4 cone holder 5; Also comprise be arranged on slips 4 can be compressed and provide the stroke pressure compensator of pressure for slips 4.
In the present embodiment, stroke pressure compensator can by elastic caoutchouc, spring or other possesses elastomeric objects or device forms.
The operating principle of the present embodiment is as follows:
In the situation that hoistway loses circle, by extruding, can only there is the slips 4 of minority to anchor in the borehole wall 15.Owing to being provided with stroke pressure compensator, make apical ring 3 or lower lock nut 8 can continue compression and anchor into the stroke pressure compensator on the slips 4 in the borehole wall, thereby remaining slips 4 is anchored in the borehole wall 15, solved the problem that down-hole blocking device cannot be fixed in losing circle hoistway.
Further, all slips 4 anchor into after the borehole wall 15, and the power of apical ring 3 or lower lock nut 8 will be passed to slips cone holder 5 by all slips 4, and slips cone holder 5 is stressed evenly, can not cause slips cone holder 5 breakages.
At slips 4, anchor into after the borehole wall, apical ring 3 or lower lock nut 8 can continue to compress the stroke pressure compensator on slips 4, the bottom of apical ring 3 or lower lock nut 8 is contacted with the bottom of slips cone holder 5, the power of apical ring 3 or lower lock nut 8 will directly be passed in slips cone holder 5 thus, slips 4 is directly not stressed during this time, avoided tooth and the borehole wall 15 on slips 4 to rub, slips 4 can not damage.
As shown in figure 11, at slips 4, anchor into after the borehole wall, apical ring 3 or lower lock nut 8 can continue to compress the stroke pressure compensator on slips 4, the bottom of apical ring 3 or lower lock nut 8 is contacted with the bottom of slips cone holder 5, the power of apical ring 3 or lower lock nut 8 will directly be passed in slips cone holder 5 thus, power during this time will not transmitted by slips 4, and the power of apical ring 3 or lower lock nut 8, by propagating in the direction parallel with central tube 1 axis, can not be decomposed.Therefore, from apical ring 3 or the power transmitted of lock nut 8 act on seal assembly completely.In the situation that guaranteeing to have sealed, central tube 1 is reduced by pulling force greatly, makes under same diameter, and opening 101 apertures of central tube 1 can access expansion, thereby greatly increase hoistway flow, improves the output of oil gas and mineral.
Embodiment 2:
The present embodiment, on the basis of embodiment 1, is further described stroke pressure compensator.
As shown in Fig. 1 ~ Fig. 4, described stroke pressure compensator is elasticity slips seat ring 9; On described, in anchor, elasticity slips seat ring 9 is arranged between described apical ring 3 and described slips 4; In described lower anchor, elasticity slips seat ring 9 is arranged between described lower lock nut 8 and described slips 4.
Elasticity slips seat ring 9 consists of elastomeric material, for example elastic caoutchouc.
In the situation that hoistway loses circle, by extruding, can only there is the slips 4 of minority to anchor in the borehole wall 15, owing to being provided with elasticity slips seat ring 9, make apical ring 3 or lower lock nut 8 can continue compression and anchor into the elasticity slips seat ring 9 on the slips 4 in the borehole wall, thereby remaining slips 4 is anchored in the borehole wall 15, solved the problem that down-hole blocking device cannot be fixed in losing circle hoistway.
At slips 4, anchor into after the borehole wall, apical ring 3 or lower lock nut 8 can continue to compress the elasticity slips seat ring 9 on slips 4, the bottom of apical ring 3 or lower lock nut 8 is contacted with the bottom of slips cone holder 5, the power of apical ring 3 or lower lock nut 8 will directly be passed in slips cone holder 5 thus, slips 4 is directly not stressed during this time, avoided tooth and the borehole wall 15 on slips 4 to rub, slips 4 can not damage.
As shown in figure 11, at slips 4, anchor into after the borehole wall, apical ring 3 or lower lock nut 8 can continue to compress the elasticity slips seat ring 9 on slips 4, the bottom of apical ring 3 or lower lock nut 8 is contacted with the bottom of slips cone holder 5, the power of apical ring 3 or lower lock nut 8 will directly be passed in slips cone holder 5 thus, power during this time will not transmitted by slips 4, and the power of apical ring 3 or lower lock nut 8, by propagating in the direction parallel with central tube 1 axis, can not be decomposed.Therefore, central tube 1 force in radial will reduce greatly, make under same diameter, and opening 101 apertures of central tube 1 can access expansion, thereby greatly increase hoistway flow, improve the output of oil gas and mineral.
In the present embodiment, as shown in Figure 5 and Figure 6, can also replace slips seat ring 9 by spring 13.One end of spring 13 is connected with slips 4, and the other end of spring 13 is connected with apical ring 3 or lower lock nut 8.
In the present embodiment, can also replace slips seat ring 9 by level pressure plunger valve.Level pressure plunger valve can provide constant pressure for slips 4, if be greater than the rated pressure of level pressure plunger valve from the pressure of apical ring 3 or lower lock nut 8, level pressure plunger valve shrinks and pressure release, makes the pressure of the effect of level pressure plunger valve and slips 4 constant all the time.With respect to spring 13 or slips seat ring 9, level pressure plunger valve can guarantee that each slips is subject to constant pressure, thereby makes the bonding strength of each slips and the borehole wall more even.
Embodiment 3:
The present embodiment is further described stroke pressure compensator on the basis of embodiment 1.
As shown in Figure 2 and Figure 4, described stroke pressure compensator is slips pad 10; Slips pad 10 is arranged at the bottom of described slips 4 and contacts with described slips cone holder 5.
The operating principle of slips pad 10 is identical with the slips seat ring 9 in embodiment 2, repeats no more herein.
Embodiment 4:
The present embodiment is further described stroke pressure compensator on the basis of embodiment 1.
As shown in Fig. 1 ~ Fig. 4, the present embodiment is the combination of embodiment 2 and embodiment 3, and slips pad 10 and slips seat ring 9 are set simultaneously, or slips pad 10 and spring 13. are set simultaneously, or slips pad 10 and level pressure plunger valve are set simultaneously.
Embodiment 5:
The present embodiment is further described stroke pressure compensator on the basis of embodiment 1.
As shown in Figure 7 and Figure 8, described stroke pressure compensator is the elastic layer 11 of the described slips 4 of parcel.
The operating principle of elastic layer 11 is identical with the slips seat ring 9 in embodiment 2, repeats no more herein.Meanwhile, it should be noted that elastic layer 11 also has another effect.
At down-hole blocking device in the process that throw in down-hole, the foreign matter in hoistway very easily with slips 4 on tooth contact slips 4 is taken out of, thereby occur settingly midway, down-hole blocking device cannot be thrown in to precalculated position.And adopt the elastic layer 11 of parcel slips 4 as stroke pressure compensator, and can protect slips 4, prevent that foreign matter from taking slips 4 out of by the tooth on slips 4, solved in the process that down-hole blocking device throws in down-hole and occurred setting problem midway.
Embodiment 6:
As shown in Figure 9, the present embodiment, on the basis of above-mentioned any one embodiment, also comprises the protective jacket 12 of the described upper anchor of parcel and described lower anchor.
Embodiment 7:
As shown in Figure 9 and Figure 10, down-hole blocking device, comprises central tube 1, is arranged at the seal assembly on central tube 1, is arranged on central tube 1 and lays respectively at upper anchor and the lower anchor of seal assembly top and bottom.Upper anchor and lower anchor adopt any one scheme in embodiment 1 ~ 6 to realize.
The operating principle of the present embodiment is as follows:
The bar 14 of giving up is threaded with an outside cleft hand, and this cleft hand outside also comprises the jacking mechanism contacting with upper anchor.By this jacking mechanism, upper anchor is exerted pressure, make anchor and lower anchor crush seal assembly, seal assembly axial length dwindles, there is expanded radially, final upper anchor and lower anchor anchor in the borehole wall 11, realize the location of down-hole blocking device in hoistway, and seal assembly is close to the sealing that the borehole wall is realized hoistway, the bar 14 of giving up is pulled off, and down-hole blocking device is stayed in hoistway.
Embodiment 8:
The present embodiment, on the basis of embodiment 7, to down-hole blocking device, is further described.
In upper anchor, as shown in figure 12, in upper lock nut 2, be provided with screwed hole, upper lock nut 2 and central tube 1 upper end threaded engagement.
As shown in figure 14, apical ring 3 is placed on central tube 1, and apical ring 3 can be along the axial-movement of central tube 1 stressed in the situation that.The end face that apical ring 3 contacts with upper lock nut 2 is flat face, and another end face of apical ring 3 is taper surface 31, is evenly provided with a plurality of separation projections 32 on taper surface 31.If stroke pressure compensator is elasticity slips seat ring 9, one end of elasticity slips seat ring 9 is connected with slips 4, and the other end of elasticity slips seat ring 9 contacts with taper surface 31, and elasticity slips seat ring 9 is between two adjacent separation projections 32.If stroke pressure compensator is spring 13, one end of spring 13 is connected with slips 4, and the other end of spring 13 is connected with taper surface 31, and spring 13 is between two adjacent separation projections 32.If stroke pressure compensator is slips pad 10, one end of slips 4 as shown in figure 15 contacts with taper surface 31, and slips 4 is separated between projection 32 at adjacent two.
As shown in figure 16, slips cone holder 5 is placed on central tube 1, slips cone de-5 can be along the axial-movement of central tube 1 stressed in the situation that, slips cone holder 5 end faces relative with apical ring 3 are taper surface 51, on taper surface 51, be provided with a plurality of separation projections 52, the other end of slips cone holder 5 is flat face and contacts with seal assembly.If stroke pressure compensator is elasticity slips seat ring 9 or spring 13, the other end of slips 4 contacts with taper surface 51 and between adjacent separation projection 52.If stroke pressure compensator is slips pad 10, the other end of slips 4 contacts with taper surface 51 by slips pad 10 and between adjacent separation projection 52.
In lower anchor, as shown in figure 13, on lower lock nut 8, be provided with screwed hole, lower lock nut 8 and central tube 1 lower end threaded engagement.Lower lock nut 8 is taper surface 81 near one end of seal assembly, is provided with a plurality of separation projections 82 on taper surface 81.If stroke pressure compensator is elasticity slips seat ring 9, one end of elasticity slips seat ring 9 is connected with slips 4, and the other end of elasticity slips seat ring 9 contacts with taper surface 81, and elasticity slips seat ring 9 is between two adjacent separation projections 82.If stroke pressure compensator is spring 13, one end of spring 13 is connected with slips 4, and the other end of spring 13 is connected with taper surface 81, and spring 83 is between two adjacent separation projections 82.If stroke pressure compensator is slips pad 10, one end of slips 4 as shown in figure 15 contacts with taper surface 81, and slips 4 is separated between projection 82 at adjacent two.
As shown in figure 16, slips cone holder 5 is placed on central tube 1, and slips cone de-5 can be along the axial-movement of central tube 1 stressed in the situation that, and slips cone holder 5 end faces relative with apical ring 3 are taper surface 51, are provided with a plurality of separation projections 52 on taper surface 51.If stroke pressure compensator is elasticity slips seat ring 9 or spring 13, the other end of slips 4 contacts with taper surface 51 and between adjacent separation projection 52.If stroke pressure compensator is slips pad 10, the other end of slips 4 contacts with taper surface 51 by slips pad 10 and between adjacent separation projection 52.
During work, by the bar 14 of giving up, fix packing element secondary booster central tube, then apical ring 3 is exerted pressure, now apical ring 3 and lower lock nut 8 make to move on the taper surface 51 of slips 4 in slips cone holder 5, pressure is bored holder 5 by slips and is conducted to seal assembly simultaneously, make the axially compressed of seal assembly, radial dilatation.Tooth on final slips 4 snaps in the borehole wall 10, makes seal assembly keep confined state, realizes the sealing of hoistway.
Wherein, described seal assembly can comprise the middle packing element 6 being placed on packing element secondary booster central tube 1 and the end packing element 7 that is arranged in packing element 6 two ends.
As mentioned above, just can realize preferably the present invention.
Claims (10)
1. an anchoring structure, is characterized in that:
Comprise for being arranged at upper anchor and the lower anchor on central tube (1);
Upper anchor comprises the upper lock nut (2) being connected with the connecting thread (101) of central tube (1) upper end, the apical ring (3) contacting with upper lock nut (2), a plurality of slips (4) that contact with apical ring (3), the slips contacting with slips (4) cone holder (5);
Lower anchor comprises the lower lock nut (8) being connected with the connecting thread (101) of central tube (1) lower end, the slips (4) that a plurality of and lower lock nut (8) contacts, the slips contacting with slips (4) cone holder (5);
Also comprise be arranged on slips (4) can be compressed and provide the stroke pressure compensator of pressure for slips (4).
2. a kind of anchoring structure according to claim 1, is characterized in that:
Described stroke pressure compensator is elasticity slips seat ring (9), spring (13) or level pressure plunger valve;
On described, in anchor, elasticity slips seat ring (9), spring (13) or level pressure plunger valve are arranged between described apical ring (3) and described slips (4);
In described lower anchor, elasticity slips seat ring (9), spring (13) or level pressure plunger valve are arranged between described lower lock nut (8) and described slips (4).
3. a kind of anchoring structure according to claim 1, is characterized in that:
Described stroke pressure compensator is slips pad (10);
Slips pad (10) is arranged at the bottom of described slips (4) and contacts with described slips cone holder (5).
4. a kind of anchoring structure according to claim 1, is characterized in that:
Described stroke pressure compensator is the elastic layer (11) of the described slips of parcel (4).
5. according to a kind of anchoring structure described in any one in claim 1 ~ 4, it is characterized in that:
The protective jacket (12) that also comprises the described upper anchor of parcel and described lower anchor.
6. down-hole blocking device, is characterized in that:
Comprise central tube (1), be arranged at the seal assembly on central tube (1), be arranged at seal assembly top and bottom were gone up and laid respectively to central tube (1) upper anchor and lower anchor;
Upper anchor comprises the upper lock nut (2) being threaded with central tube (1) upper end, the apical ring (3) contacting with upper lock nut (2), a plurality of slips (4) that contact with apical ring (3), the slips contacting with slips (4) cone holder (5);
Lower anchor comprises the lower lock nut (8) being threaded with central tube (1) lower end, the slips (4) that a plurality of and lower lock nut (8) contacts, the slips contacting with slips (4) cone holder (5);
Also comprise be arranged on slips (4) can be compressed and provide the stroke pressure compensator of pressure for slips (4).
7. down-hole according to claim 6 blocking device, is characterized in that:
Described stroke pressure compensator is elasticity slips seat ring (9), spring (13) or level pressure plunger valve;
On described, in anchor, elasticity slips seat ring (9), spring (13) or level pressure plunger valve are arranged between described apical ring (3) and described slips (4);
In described lower anchor, elasticity slips seat ring (9), spring (13) or level pressure plunger valve are arranged between described lower lock nut (8) and described slips (4).
8. down-hole according to claim 6 blocking device, is characterized in that:
Described stroke pressure compensator is slips pad (10);
Slips pad (10) is arranged at the bottom of described slips (4) and contacts with described slips cone holder (5).
9. down-hole according to claim 6 blocking device, is characterized in that:
Described stroke pressure compensator is the elastic layer (11) of the described slips of parcel (4).
10. according to the down-hole blocking device described in any one in claim 6 ~ 9, it is characterized in that:
The protective jacket (12) that also comprises the described upper anchor of parcel and described lower anchor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410004732.8A CN103696715B (en) | 2014-01-07 | 2014-01-07 | A kind of anchoring structure and down-hole blocking device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410004732.8A CN103696715B (en) | 2014-01-07 | 2014-01-07 | A kind of anchoring structure and down-hole blocking device |
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| CN103696715A true CN103696715A (en) | 2014-04-02 |
| CN103696715B CN103696715B (en) | 2016-03-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110186344A (en) * | 2019-07-16 | 2019-08-30 | 通源石油科技集团股份有限公司 | A kind of plugging device and method for cutting top for coal mine |
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| CN113123746A (en) * | 2020-01-10 | 2021-07-16 | 成都百胜野牛科技有限公司 | Underground applicator and underground tool assembly |
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| CN103696715B (en) | 2016-03-02 |
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