CN103696715B - A kind of anchoring structure and down-hole blocking device - Google Patents
A kind of anchoring structure and down-hole blocking device Download PDFInfo
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- CN103696715B CN103696715B CN201410004732.8A CN201410004732A CN103696715B CN 103696715 B CN103696715 B CN 103696715B CN 201410004732 A CN201410004732 A CN 201410004732A CN 103696715 B CN103696715 B CN 103696715B
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Abstract
The invention discloses a kind of anchoring structure, comprising for being arranged at upper anchor on central tube and lower anchor; Upper anchor comprises the upper lock nut be connected with the connecting thread of central tube upper end, the apical ring contacted with upper lock nut, multiple slips contacted with apical ring, and the slips contacted with slips is bored and held in the palm; Lower anchor comprises the lower lock nut be connected with the connecting thread of central tube lower end, the slips that multiple and lower lock nut contacts, and the slips contacted with slips is bored and held in the palm; Also comprise and be arranged at can be compressed and provide the stroke pressure compensation arrangement of pressure for slips on slips.The invention also discloses a kind of down-hole blocking device.The invention has the advantages that: down-hole can be made to block be contained in that the holder of fixed in hoistway, slips cone is not fragile, the not fragile inefficacy of slips and low to the central tube requirement of strength in down-hole blocking dress.
Description
Technical field
The present invention relates to oil gas and mineral mining field, particularly relate 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 usually.Existing blocking device comprises central tube and the anchoring structure be arranged on central tube and hermetically-sealed construction.After blocking device being dropped into precalculated position, down-hole, by extruding, anchoring structure is anchored in the borehole wall and realize the fixing of blocking device, anchoring structure extruded sealing structure makes hermetically-sealed construction expand in radial directions thus allows hermetically-sealed construction be close to the borehole wall to realize sealing 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 required high problem to central tube tensile strength.
Summary of the invention
Namely object of the present invention is to overcome the deficiencies in the prior art, provides a kind of and down-hole can be made to block be contained in that the holder of fixed in hoistway, slips cone is not fragile, the not fragile inefficacy of slips and require low anchoring structure to the central tube tensile strength in down-hole blocking dress.
Another object of the present invention be to provide a kind of fixed in hoistway, the holder of 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:
A kind of anchoring structure, comprises for being arranged at upper anchor on central tube and lower anchor; Upper anchor comprises the upper lock nut be connected with the connecting thread of central tube upper end, the apical ring contacted with upper lock nut, multiple slips contacted with apical ring, and the slips contacted with slips is bored and held in the palm; Lower anchor comprises the lower lock nut be connected with the connecting thread of central tube lower end, the slips that multiple and lower lock nut contacts, and the slips contacted with slips is bored and held in the palm; Also comprise and be arranged at can be compressed and provide the stroke pressure compensation arrangement of pressure for slips on slips.
Inventor is found by research:
1. why there is down-hole blocking device in hoistway, fix illusive situation, is because access is positioned at underground, and it faces complicated geological condition, and the situation that can unavoidably cause hoistway to lose circle occurs.When hoistway loses circle, the slips of minority can only be had to anchor in the borehole wall by extruding, the slips anchored in the borehole wall will stop the motion of apical ring or lower lock nut, make apical ring or lower lock nut cannot continue to extrude the slips do not snapped in the borehole wall, thus cause part slips cannot anchor in the borehole wall, affect the stability that down-hole blocking device is fixing in the borehole wall.
Simultaneously, in this case, the power of apical ring or lower lock nut will be passed to the holder of slips cone by the slips anchored in the borehole wall, this causes slips to bore holder unbalance stress, the power of apical ring or lower lock nut will act on slips and bore a few point on holding in the palm, the stress point that slips is bored in holder is stressed excessive, very easily causes slips to bore holder breakage.
2. why exist slips easily damage inefficacy be due to, after slips anchors into the borehole wall, the power of apical ring or lower lock nut is passed to the holder of slips cone by slips, bore toss by slips again and be handed to seal assembly, slips is directly stressed in the process, the tooth caused on slips and the borehole wall are rubbed, causes slips to damage.
3. 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, bore toss by slips again and be handed to seal assembly, it is inclined-plane that slips and slips bore the contact surface held in the palm, and therefore the power of apical ring or lower lock nut is decomposed there being major part to the radial direction of central tube.Such as, seal assembly needs the pressure being applied in 49KN that it just can be made to be close on tube wall to complete sealing, if be decomposed from the power of apical ring or lower lock nut transmission, seal assembly so will be made to be subject to the pressure of 49KN, require to reach about 196KN from the power of apical ring or lower lock nut transmission, this just causes pulling force suffered by central tube to be about 196KN, is far longer than seal assembly pressure.This proposes higher requirement to the tensile strength of central tube, and therefore, existing down-hole blocking device is in order to ensure the intensity of central tube, its inner wall thickness is comparatively large, and under this causes same diameter, the endoporus aperture of central tube is less, the flow of hoistway is affected, yielding poorly of oil gas and mineral.
In order to solve the problem, inventor arranges stroke pressure compensation arrangement on slips, and its effect is as follows:
1. when hoistway loses circle, the slips of minority can only be had to anchor in the borehole wall by extruding, but owing to being provided with stroke pressure compensation arrangement, make apical ring or lower lock nut can continue to compress stroke pressure compensation arrangement on the slips that anchors in the borehole wall, thus make apical ring or lower lock nut by the stroke pressure compensation arrangement compression on remaining slips, residue slips anchors in the borehole wall by the pressure that stroke pressure compensation arrangement produces, and solves the problem that down-hole blocking device cannot be fixed in mistake circle hoistway.
Further, after all slips anchor into the borehole wall, the power of apical ring or lower lock nut will be passed to the holder of slips cone by all slips, and slips cone holder uniform force can not cause the holder of slips cone damaged.
2. after slips anchors into the borehole wall, apical ring or lower lock nut can continue to compress the stroke pressure compensation arrangement on slips, make the bottom of apical ring or lower lock nut and slips bore the bottom of holding in the palm to contact, the power of apical ring or lower lock nut will directly be passed in the holder of slips cone thus, period, slips was not directly stressed, avoid tooth on slips and the borehole wall rubs, slips can not damage.
3. after slips anchors into the borehole wall, apical ring or lower lock nut can continue to compress the stroke pressure compensation arrangement on slips, make the bottom of apical ring or lower lock nut and slips bore the bottom of holding in the palm to contact, the power of apical ring or lower lock nut will directly be passed in the holder of slips cone thus, the power of period will not be transmitted by slips, the power of apical ring or lower lock nut by with the direction of center pipe axle line parallel on propagate, can not be decomposed.Such as, seal assembly needs the pressure being applied in 49KN that it just can be made to be close on tube wall to complete sealing, so under the above constitution, owing to being directly passed in the holder of slips cone from the power of apical ring or lower lock nut transmission, so reaching 49KN from the power of apical ring or lower lock nut transmission can make seal assembly be close to tube wall, suffered by central tube, pulling force also reduces greatly, is only only 49KN.This makes under same diameter, and the endoporus aperture of central tube can be expanded, thus greatly increases hoistway flow, improves the output of oil gas and mineral.
Further, described stroke pressure compensation arrangement 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 compensation arrangement is slips pad; Slips pad is arranged at the bottom of described slips and bores to hold in the palm with described slips and contact.
Further, described stroke pressure compensation arrangement is the elastic layer wrapping up described slips.
In the process of throwing in down-hole at down-hole blocking device, slips is very easily taken out of with the tooth contact on slips by the foreign matter in hoistway, thus it is setting that midway occurs, and makes down-hole blocking device cannot by input to precalculated position.
In order to address this problem, adopt the elastic layer of parcel slips as stroke pressure compensation arrangement, can protect slips, prevent foreign matter from being taken out of by slips by the tooth on slips, solve in the process that down-hole blocking device throws in down-hole and occur the problem that midway is setting.
Further, the protective jacket of the described upper anchor of parcel and described lower anchor is also comprised.
Protective jacket can prevent foreign material from entering anchor and lower anchor, can effectively avoid foreign material to affect the problem of upper anchor and lower anchor work.When setting, slips can anchor in the borehole wall after being crushed by protective jacket.
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, to be arranged on central tube and to lay respectively at the upper anchor of seal assembly top and bottom and lower anchor; Upper anchor comprises the upper lock nut be connected with central tube threaded upper ends, the apical ring contacted with upper lock nut, multiple slips contacted with apical ring, and the slips contacted with slips is bored and held in the palm; Lower anchor comprises the lower lock nut be threaded with central tube lower end, the slips that multiple and lower lock nut contacts, and the slips contacted with slips is bored and held in the palm; Also comprise and be arranged at can be compressed and provide the stroke pressure compensation arrangement of pressure for slips on slips.
Further, described stroke pressure compensation arrangement 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 compensation arrangement is slips pad; Slips pad is arranged at the bottom of described slips and bores to hold in the palm with described slips and contact.
Further, described stroke pressure compensation arrangement is the elastic layer wrapping up described slips.
Further, the protective jacket of the described upper anchor of parcel and described lower anchor is also comprised.
In sum, advantage of the present invention and beneficial effect are:
1. arrange stroke pressure compensation arrangement, solve when hoistway loses circle, part slips cannot anchor into the problem of the borehole wall, enable down-hole blocking device more firm be fixed in hoistway, can prevent slips from boring holder simultaneously and be damaged by pressure;
2. arrange stroke pressure compensation arrangement, avoid tooth on slips and the borehole wall rubs, slips can not damage;
3. stroke pressure compensation arrangement being set, when realizing sealing, make pulling force suffered by central tube less, thus under same diameter, the endoporus aperture of central tube can being expanded, thus greatly increase hoistway flow, improve the output of oil gas and mineral;
4. adopt the elastic layer of parcel slips as stroke pressure compensation arrangement, can protect slips, prevent foreign matter from being taken out of by slips by the tooth on slips, solve in the process that down-hole blocking device throws in down-hole and occur setting problem halfway;
5. protective jacket is set, can prevents foreign material from entering anchor and lower anchor, can effectively avoid foreign material to affect the problem of upper anchor and lower anchor work.
Accompanying drawing explanation
In order to be illustrated more clearly in embodiments of the invention, be briefly described to the accompanying drawing used required for describing in the embodiment of the present invention below.Apparent, the accompanying drawing in the following describes is only some embodiments recorded in the present invention, for a person skilled in the art, when not paying creative work, according to accompanying drawing below, can also obtain other accompanying drawing.
Fig. 1 is the structural representation of upper the first embodiment of anchor;
Fig. 2 is the cross-sectional view of upper the first embodiment of anchor;
Fig. 3 is the structural representation of lower the first embodiment of anchor;
Fig. 4 is the cross-sectional view of lower the first embodiment of anchor;
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, 14-gives up bar, 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.
Detailed description of the invention
In order to make those skilled in the art understand the present invention better, below in conjunction with the accompanying drawing in the embodiment of the present invention, clear, complete description is carried out to the technical scheme in the embodiment of the present invention.Apparent, embodiment described below is only the part in the embodiment of the present invention, instead of all.Based on the embodiment that the present invention records, other all embodiment that those skilled in the art obtain when 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 on central tube 1 and lower anchor; Upper anchor comprises the upper lock nut 2 be connected with the connecting thread 101 of central tube 1 upper end, the apical ring 3 contacted with upper lock nut 2, multiple slips 4 contacted with apical ring 3, and the slips contacted with slips 4 bores holder 5; Lower anchor comprises the lower lock nut 8 be connected with the connecting thread 101 of central tube 1 lower end, the slips 4 that multiple and lower lock nut 8 contacts, and the slips contacted with slips 4 bores holder 5; Also comprise and be arranged at can be compressed and provide the stroke pressure compensation arrangement of pressure for slips 4 on slips 4.
In the present embodiment, stroke pressure compensation arrangement can by elastic caoutchouc, spring or other possesses elastomeric objects or device is formed.
The operating principle of the present embodiment is as follows:
When hoistway loses circle, the slips 4 of minority can only be had to anchor in the borehole wall 15 by extruding.Owing to being provided with stroke pressure compensation arrangement, make apical ring 3 or lower lock nut 8 can continue to compress stroke pressure compensation arrangement on the slips 4 that anchors in the borehole wall, thus remaining slips 4 is anchored in the borehole wall 15, solve the problem that down-hole blocking device cannot be fixed in mistake circle hoistway.
Further, after all slips 4 anchor into the borehole wall 15, the power of apical ring 3 or lower lock nut 8 will be passed to the holder 5 of slips cone by all slips 4, and slips cone holder 5 uniform force, can not cause slips to bore holder 5 breakage.
After slips 4 anchors into the borehole wall, apical ring 3 or lower lock nut 8 can continue to compress the stroke pressure compensation arrangement on slips 4, the bottom making the bottom of apical ring 3 or lower lock nut 8 and slips bore holder 5 contacts, the power of apical ring 3 or lower lock nut 8 will directly be passed in the holder 5 of slips cone thus, period, slips 4 was not directly stressed, avoid tooth on slips 4 and the borehole wall 15 rubs, slips 4 can not damage.
As shown in figure 11, after slips 4 anchors into the borehole wall, apical ring 3 or lower lock nut 8 can continue to compress the stroke pressure compensation arrangement on slips 4, the bottom making the bottom of apical ring 3 or lower lock nut 8 and slips bore holder 5 contacts, the power of apical ring 3 or lower lock nut 8 will directly be passed in the holder 5 of slips cone thus, the power of period will not be transmitted by slips 4, the power of apical ring 3 or lower lock nut 8 by with the direction of central tube 1 axis being parallel on propagate, can not be decomposed.Therefore, the power transmitted from apical ring 3 or lower lock nut 8 acts on seal assembly completely.When ensureing to have sealed, central tube 1 reduces greatly by pulling force, and make under same diameter, opening 101 aperture of central tube 1 can be expanded, thus greatly increases 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 compensation arrangement.
As shown in Fig. 1 ~ Fig. 4, described stroke pressure compensation arrangement 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 is made up of elastomeric material, such as elastic caoutchouc.
When hoistway loses circle, the slips 4 of minority can only be had to anchor in the borehole wall 15 by extruding, owing to being provided with elasticity slips seat ring 9, make apical ring 3 or lower lock nut 8 can continue to compress elasticity slips seat ring 9 on the slips 4 that anchors in the borehole wall, thus remaining slips 4 is anchored in the borehole wall 15, solve the problem that down-hole blocking device cannot be fixed in mistake circle hoistway.
After slips 4 anchors into 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 making the bottom of apical ring 3 or lower lock nut 8 and slips bore holder 5 contacts, the power of apical ring 3 or lower lock nut 8 will directly be passed in the holder 5 of slips cone thus, period, slips 4 was not directly stressed, avoid tooth on slips 4 and the borehole wall 15 rubs, slips 4 can not damage.
As shown in figure 11, after slips 4 anchors into 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 making the bottom of apical ring 3 or lower lock nut 8 and slips bore holder 5 contacts, the power of apical ring 3 or lower lock nut 8 will directly be passed in the holder 5 of slips cone thus, the power of period will not be transmitted by slips 4, the power of apical ring 3 or lower lock nut 8 by with the direction of central tube 1 axis being parallel on propagate, can not be decomposed.Therefore, central tube 1 force in radial will reduce greatly, make under same diameter, and opening 101 aperture of central tube 1 can be expanded, thus greatly increase hoistway flow, improve the output of oil gas and mineral.
In the present embodiment, as shown in Figure 5 and Figure 6, slips seat ring 9 can also be replaced 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, slips seat ring 9 can also be replaced 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, then 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.Relative to spring 13 or slips seat ring 9, level pressure plunger valve can ensure that each slips is by constant pressure, thus makes the bonding strength of each slips and the borehole wall more even.
Embodiment 3:
The present embodiment is further described stroke pressure compensation arrangement on the basis of embodiment 1.
As shown in Figure 2 and Figure 4, described stroke pressure compensation arrangement is slips pad 10; Slips pad 10 is arranged at the bottom of described slips 4 and bores holder 5 with described slips and contact.
Slips pad 10 is made up of elastomeric material, such as elastic caoutchouc.
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 compensation arrangement 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, namely arranges slips pad 10 and slips seat ring 9 simultaneously, or arranges slips pad 10 and spring 13. simultaneously, or arranges slips pad 10 and level pressure plunger valve simultaneously.
Embodiment 5:
The present embodiment is further described stroke pressure compensation arrangement on the basis of embodiment 1.
As shown in Figure 7 and Figure 8, described stroke pressure compensation arrangement is the elastic layer 11 wrapping up described slips 4.
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.
In the process of throwing in down-hole at down-hole blocking device, slips 4 is very easily taken out of with the tooth contact on slips 4 by the foreign matter in hoistway, thus it is setting that midway occurs, and makes down-hole blocking device cannot by input to precalculated position.And adopt the elastic layer 11 of parcel slips 4 as stroke pressure compensation arrangement, slips 4 can be protected, prevent foreign matter from being taken out of by slips 4 by the tooth on slips 4, solve in the process that down-hole blocking device throws in down-hole and occur setting problem halfway.
Embodiment 6:
As shown in Figure 9, the present embodiment, on the basis of any one embodiment above-mentioned, also comprises the protective jacket 12 of the described upper anchor of parcel and described lower anchor.
Protective jacket 12 can prevent foreign material from entering anchor and lower anchor, can effectively avoid foreign material to affect the problem of upper anchor and lower anchor work.When setting, slips 4 can anchor in the borehole wall after being crushed by protective jacket 12.
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, to be arranged on central tube 1 and to lay respectively at the upper anchor of seal assembly top and bottom and lower anchor.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:
Bar 14 of giving up is threaded with an outside cleft hand, and this cleft hand outside also comprises the jacking mechanism contacted with upper anchor.By this jacking mechanism, upper anchor is exerted pressure, make anchor and lower anchor crush seal assembly, seal assembly axial length reduces, there is expanded radially, final upper anchor and lower anchor anchor in the borehole wall 11, and realize the location of down-hole blocking device in hoistway, seal assembly is close to the sealing that the borehole wall realizes hoistway, bar 14 of giving up is pulled off, and is stayed in hoistway by down-hole blocking device.
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, be provided with screwed hole in upper lock nut 2, upper lock nut 2 coordinates with central tube 1 threaded upper ends.
As shown in figure 14, apical ring 3 is placed on central tube 1, and apical ring 3 can the axial-movement of centrally pipe 1 when stressed.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, and taper surface 31 is evenly provided with multiple separation protruding 32.If stroke pressure compensation arrangement is elasticity slips seat ring 9, then 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 separated between protruding 32 at adjacent two.If stroke pressure compensation arrangement is spring 13, then 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 separated between protruding 32 at adjacent two.If stroke pressure compensation arrangement is slips pad 10, then one end of slips 4 as shown in figure 15 contacts with taper surface 31, and slips 4 is separated between protruding 32 at adjacent two.
As shown in figure 16, the holder 5 of slips cone is placed on central tube 1, slips cone de-5 can the axial-movement of centrally pipe 1 when stressed, the end face that slips bores holder 5 relative with apical ring 3 is taper surface 51, taper surface 51 is provided with multiple separation protruding 52, the other end of slips cone holder 5 is flat face and contacts with seal assembly.If stroke pressure compensation arrangement is elasticity slips seat ring 9 or spring 13, then the other end of slips 4 contacts with taper surface 51 and between adjacent separation projection 52.If stroke pressure compensation arrangement is slips pad 10, then the other end of slips 4 to be contacted with taper surface 51 by slips pad 10 and between adjacent separation projection 52.
In lower anchor, as shown in figure 13, lower lock nut 8 is 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, taper surface 81 is provided with multiple separation protruding 82.If stroke pressure compensation arrangement is elasticity slips seat ring 9, then 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 separated between protruding 82 at adjacent two.If stroke pressure compensation arrangement is spring 13, then 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 separated between protruding 82 at adjacent two.If stroke pressure compensation arrangement is slips pad 10, then one end of slips 4 as shown in figure 15 contacts with taper surface 81, and slips 4 is separated between protruding 82 at adjacent two.
As shown in figure 16, the holder 5 of slips cone is placed on central tube 1, and slips cone de-5 can the axial-movement of centrally pipe 1 when stressed, and slips cone holder 5 end face relative with apical ring 3 is taper surface 51, taper surface 51 is provided with multiple separation projection 52.If stroke pressure compensation arrangement is elasticity slips seat ring 9 or spring 13, then the other end of slips 4 contacts with taper surface 51 and between adjacent separation projection 52.If stroke pressure compensation arrangement is slips pad 10, then the other end of slips 4 to be contacted with taper surface 51 by slips pad 10 and between adjacent separation projection 52.
During work, packing element secondary booster central tube is fixed by bar 14 of giving up, then apical ring 3 is exerted pressure, now apical ring 3 and lower lock nut 8 make the taper surface 51 of slips 4 in the holder 5 of slips cone moves, pressure conducts to seal assembly by the holder 5 of slips cone simultaneously, the axis of seal assembly is compressed, 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 be placed on packing element secondary booster central tube 1 and the end packing element 7 being arranged in packing element 6 two ends.
As mentioned above, just the present invention can be realized preferably.
Claims (10)
1. an anchoring structure, is characterized in that:
Comprise for being arranged at upper anchor on central tube (1) and lower anchor;
Upper anchor comprises the upper lock nut (2) be connected with the connecting thread (101) of central tube (1) upper end, the apical ring (3) contacted with upper lock nut (2), multiple slips (4) contacted with apical ring (3), the slips contacted with slips (4) is bored and is held in the palm (5);
Lower anchor comprises the lower lock nut (8) be connected with the connecting thread (101) of central tube (1) lower end, the slips (4) that multiple and lower lock nut (8) contacts, and the slips contacted with slips (4) is bored and held in the palm (5);
Also comprise and be arranged at can be compressed and be the stroke pressure compensation arrangement that slips (4) provides pressure on slips (4).
2. a kind of anchoring structure according to claim 1, is characterized in that:
Described stroke pressure compensation arrangement 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 compensation arrangement is slips pad (10);
Slips pad (10) is arranged at the bottom of described slips (4) and bores with described slips and ask (5) to contact.
4. a kind of anchoring structure according to claim 1, is characterized in that:
Described stroke pressure compensation arrangement is the elastic layer (11) of the described slips of parcel (4).
5., according to a kind of anchoring structure in claim 1 ~ 4 described in any one, it is characterized in that:
Also comprise the protective jacket (12) of 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 central tube (1) and go up and lay respectively at the upper anchor of seal assembly top and bottom and lower anchor;
Upper anchor comprises the upper lock nut (2) be connected with central tube (1) threaded upper ends, the apical ring (3) contacted with upper lock nut (2), multiple slips (4) contacted with apical ring (3), and the slips contacted with slips (4) is bored and held in the palm (5);
Lower anchor comprises the lower lock nut (8) be threaded with central tube (1) lower end, the slips (4) that multiple and lower lock nut (8) contacts, and the slips contacted with slips (4) is bored and held in the palm (5);
Also comprise and be arranged at can be compressed and be the stroke pressure compensation arrangement that slips (4) provides pressure on slips (4).
7. down-hole according to claim 6 blocking device, is characterized in that:
Described stroke pressure compensation arrangement 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 compensation arrangement is slips pad (10);
Slips pad (10) is arranged at the bottom of described slips (4) and bores with described slips and ask (5) to contact.
9. down-hole according to claim 6 blocking device, is characterized in that:
Described stroke pressure compensation arrangement is the elastic layer (11) of the described slips of parcel (4).
10., according to the down-hole blocking device in claim 6 ~ 9 described in any one, it is characterized in that:
Also comprise the protective jacket (12) of 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 CN103696715A (en) | 2014-04-02 |
| CN103696715B true CN103696715B (en) | 2016-03-02 |
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| CN103696715A (en) | 2014-04-02 |
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