CN206071525U - Packer - Google Patents

Abstract

The utility model discloses a packer belongs to the oil production equipment field. The packer comprises an upper joint, an upper central pipe, a lower central pipe, a connecting joint, a lower joint, an outer central pipe, a balance mechanism, an upper rubber cylinder seat, at least one rubber cylinder, a lower rubber cylinder seat and a setting and unsetting mechanism. The utility model discloses a set up balance mechanism in the lower extreme outside of top connection, after the packer setting, through the effort that receives on the balanced last rubber cylinder base of balance mechanism and the lower rubber cylinder base to prevent that at least one packing element from going upward or moving down, and then avoid the utility model discloses a when there is pressure differential in upper and lower both sides, at least one packing element is because of going upward or moving down the quilt wearing and tearing, guarantees the utility model discloses a life, and guarantee the utility model discloses a sealed effect.

Description

A kind of packer

Technical field

This utility model is related to oil production equipment field, more particularly to a kind of packer.

Background technology

In petroleum production engineering, packer is that one kind is fixed on sleeve pipe, by packer set Seal Oil cover annular space with Realize the device of layering.

During packer setting, by compression-expansion, Seal Oil covers annular space to the packing element of packer, by being arranged on packing Packer is fixed on inside pipe casing by the friction force between slips and packing element and sleeve pipe outside device upper end.

During this utility model is realized, inventor has found that prior art at least has problems with：

As the both sides up and down of packer usually there will be pressure reduction, when pressure reduction is more than the interaction between slips and sleeve pipe During power, packer facing sleeve produces movement tendency that is up or moving down so that slips is bursting at the collision and loses and packer is propped up Support is acted on, or slips withdraws and the interaction force reduction between sleeve pipe, accordingly, the rubbing action between packing element and sleeve pipe Power increases, when the friction force sum between the interaction force and packing element and sleeve pipe between slips and sleeve pipe is less than packer Up and down during the pressure reduction of both sides, packer is up or moves down, and packing element is up therewith or moves down, due to the friction between packing element and sleeve pipe Active force is larger, and packing element is up or easily weares and teares during moving down, and service life is shorter, and reduces packer sealing effect.

Utility model content

In order to solve in prior art when the friction between the interaction force and packing element and sleeve pipe between slips and sleeve pipe When active force sum is less than the pressure reduction of packer upper and lower both sides, packer is up or moves down, and packing element is up therewith or moves down, due to Friction force between packing element and sleeve pipe is larger, and packing element is up or easily weares and teares during moving down, and service life is shorter, and The problem of packer sealing effect is reduced, this utility model embodiment provides a kind of packer.The technical scheme is as follows：

A kind of packer, the packer include top connection, upper center tube, lower center tube, jointing, lower contact, outer Central canal, balanced controls, upper glue tube base, at least one packing element, lower rubber cylinder seat and set solution sealing mechanism；

The upper center tube is arranged on inside the lower end of the top connection, and between the upper center tube and the top connection Be tightly connected, the lower center tube is fixed on outside the lower end of the upper center tube, the jointing be fixed on it is described it is lower in Outside the lower end of heart pipe, the lower contact is fixed on outside the lower end of the union joint, and the balanced controls are fixed on described Outside the lower end of joint, the exterior central tube is arranged between the balanced controls and the upper center tube, and the outer center Pipe is stretched out from the lower end of the balanced controls, and first annular space, institute are formed between the exterior central tube and the upper center tube The lower end that glue tube base is fixed on the balanced controls is stated, at least one packing element is sequentially sleeved in the outer center from top to bottom Guan Shang, the lower rubber cylinder seat are fixed on outside the lower end of the exterior central tube, and it is described set solution sealing mechanism be fixed on it is described under Outside the lower end of glue tube base；

Process is set, the solution sealing mechanism that sets drives the lower rubber cylinder seat up and compresses at least one packing element；

Deblocking process, the solution sealing mechanism that sets drive the lower rubber cylinder seat descending and discharge at least one packing element；

After the packer setting, it is subject to by the balanced controls balance upper glue tube base and the lower rubber cylinder seat Active force, to prevent at least one packing element up or move down.

Further, the balanced controls include the first dummy piston set and the first dummy piston；

First dummy piston is set on outside the lower end of the top connection, and first dummy piston set and institute State, first dummy piston puts and is provided with the first inlet opening, first inlet opening connects institute State outside the upper end of the first dummy piston set inside and the packer；

First dummy piston is arranged between the first dummy piston set and the exterior central tube, and is located at described The top of the first inlet opening, seals between first dummy piston and first dummy piston set and the exterior central tube and matches somebody with somebody Close；

The outer wall of the exterior central tube is provided with the first outer lug boss, along the footpath of the exterior central tube in first outer lug boss To the second inlet opening is provided with, second inlet opening connects living positioned at the described first balance inside the first dummy piston set The space and the first annular space of side, and the lower rubber cylinder seat beyond the Great Wall or the solution sealing mechanism that sets are provided with the 3rd feed liquor Hole, the 3rd inlet opening connect outside the lower end of the packer with the first annular space；

After the packer setting, the first inlet opening described in the liquid Jing outside the packer upper end enters described first Dummy piston set inside in the space below first dummy piston, the liquid outside the packer lower end is by institute First annular space described in Jing and second inlet opening enter first dummy piston set inside successively to state the 3rd inlet opening In the space above first dummy piston；

If the fluid pressure outside the packer upper end is more than the fluid pressure outside its lower end, first balance First dummy piston described in the liquid-driving in the space below first dummy piston inside piston bush is up, institute State the first dummy piston to withstand in first outer lug boss, to prevent the lower rubber cylinder seat descending；

If the fluid pressure outside the packer lower end holds greatly the fluid pressure of outside, first balance thereon First dummy piston described in the liquid-driving in the space above first dummy piston inside piston bush it is descending and Withstand on the upper glue tube base, to prevent the upper glue tube base up.

Further, the balanced controls also include the second dummy piston set, the second dummy piston and pressure cap；

The second dummy piston set is fixed on outside the upper end of the first dummy piston set, and second balance is lived The upper end of plug sleeve is fixed on outside the lower end of the top connection, and the lower end of the second dummy piston set is provided with the 4th inlet opening, 4th inlet opening is connected outside the internal upper end with the packer of the second dummy piston set；

Second dummy piston is arranged between the second dummy piston set and the exterior central tube, and is located at described Above 4th inlet opening, sealing between second dummy piston and second dummy piston set and the exterior central tube is matched somebody with somebody Close；

The pressure cap is fixed on the upper end of the exterior central tube, inside the second dummy piston set positioned at described second Space above dummy piston is connected with the first annular space.

Specifically, between the upper end of first dummy piston set and the exterior central tube, first dummy piston with Between first dummy piston set, between first dummy piston set and the exterior central tube, the top connection with it is described Between second dummy piston set, between second dummy piston and the exterior central tube and second dummy piston and institute State O-ring seal is equipped between the second dummy piston set.

Further, the solution sealing mechanism that sets includes：First sets piston bush, first sets piston, second sets work Plug sleeve, second set piston, startup and set pin, lock tube, set pin, support ring, lock ring reconciliation offset nail；

First upper end for setting piston bush is fixed on outside the lower end of the lower rubber cylinder seat, and described first sets piston It is arranged on described first to set between piston bush and the upper center tube, and positioned at the upper end of the lower center tube, described first Set piston and described first and set sealing cooperation between piston bush and the upper center tube, the lower end of the upper center tube is provided with 5th inlet opening, the 5th inlet opening connect inside the upper center tube and described first set inside piston bush positioned at institute State first and set space below piston, described second sets piston bush is fixed on described first and sets outside the lower end of piston bush Portion, described second sets piston is arranged on described second and sets between piston bush and the lower center tube, and is located at the connection The top of joint, the side wall of the lower center tube are provided with the 6th inlet opening, and the 6th inlet opening connects the exterior central tube Inside and described second set in piston bush and set space below piston positioned at described second, the startup set pin by Piston bush is set through described second on the described second side wall for setting piston bush piston is set with described second be fixedly connected, institute State lock tube and be fixed on described second and set inside the lower end of piston bush, the lock tube is provided with internal tooth, the support ring passes through institute State deblocking pin to be fixed on the lateral wall of the jointing, the lock ring is fixed on described connecing by the support ring On head, the lock ring is provided with the external tooth coordinated with the internal tooth on the lock tube；

Process is set, liquid the 6th inlet opening by described in Jing inside the lower center tube sets piston bush into described second The interior space set positioned at described second below piston, promotes described second to set piston stroking upward, and described second sets on piston Make the startup set pin to cut off during row, described second sets piston continues up to promote described first to set piston Set is up, and described first sets piston bush drives described second to set piston bush up, and described second sets piston bush drives institute State lock tube up, make during the lock tube is up it is described set pin and cut off, when the lock tube goes upward to and the lock ring Position is engaged with the external tooth on the lock ring to the internal tooth on lock tube during correspondence and locks described second and set piston bush and institute State the relative position of jointing, and when described first set piston bush it is up during, liquid by the upper center tube inside 5th inlet opening described in Jing sets in piston bush into described first and sets space below piston positioned at described first, promotes institute State first and set piston stroking upward, described first set piston stroking upward during promote the lower rubber cylinder seat up and described in compressing extremely A few packing element；

Pressure release in deblocking process, the upper center tube and the lower center tube, above proposes the top connection, the top connection according to It is secondary to drive the upper center tube, the lower center tube and the jointing up, institute is made during the jointing is up State deblocking pin to cut off, the support ring comes off, the lock tube drives the lock ring to separate with the jointing, described second Set piston bush, described first set piston bush and the lower rubber cylinder seat is descending, discharge at least one packing element.

Further, the solution sealing mechanism that sets also includes closing piece, and second inwall for setting piston bush is provided with interior Boss, the upper end inwall of the jointing are provided with step, and the upper surface of the jointing is withstood on the inner convex platform, institute State the second lower end for setting piston to be sitting on the step formed in the upper end of the jointing, and described second sets piston Outer wall is fitted with the inwall of the jointing, and second inwall for setting piston bush is provided with groove, the jointing Upper end side wall be provided with through hole, one end of the closing piece is arranged in the groove, and the other end withstands on institute through the through hole State second to set on the lateral wall of piston；

Described second when setting piston stroking upward to predeterminated position, and the closing piece is by coming off in the through hole.

Specifically, described first set piston and described first set between piston bush, described first sets piston and institute State between upper center tube, the lower center tube and described first set between piston bush, described second sets piston with described Two set between piston bush, described second sets between piston and the lower center tube and the jointing and described second is sat O-ring seal is equipped between envelope piston bush.

Further, the outer wall of the lower contact is provided with least one spiral groove.

Specifically, the packer also includes two spacer rings, and the quantity of at least one packing element is three, described three Two packing elements in packing element are end packing element, and described two end packing elements are separately positioned on the upper glue tube base and the lower rubber cylinder seat On, another packing element in three packing elements is middle packing element, and the middle packing element is arranged between described two end packing elements, described Two spacer rings are separately positioned on the two ends of the middle packing element.

Specifically, between the upper center tube and the top connection, between the upper glue tube base and the exterior central tube with And O-ring seal is equipped between the lower rubber cylinder seat and the exterior central tube.

The beneficial effect brought of technical scheme that this utility model embodiment is provided is：

This utility model by arranging balanced controls outside the lower end of top connection, after packer setting, by balance The active force being subject on glue tube base and lower rubber cylinder seat on balance of mechanism, to prevent at least one packing element up or move down, and then keeps away Exempt from when upper and lower both sides of the present utility model have pressure reduction, at least one packing element is worn because up or moving down, it is ensured that this reality With new service life, and ensure sealing effectiveness of the present utility model.

Description of the drawings

For the technical scheme being illustrated more clearly that in this utility model embodiment, below will be to needed for embodiment description Accompanying drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some realities of the present utility model Example is applied, for those of ordinary skill in the art, on the premise of not paying creative work, can be with according to these accompanying drawings Obtain other accompanying drawings.

Fig. 1 is the structural representation of the packer that this utility model embodiment is provided；

Fig. 2 is the part mplifying structure schematic diagram comprising balanced controls in Fig. 1；

Fig. 3 is comprising the part mplifying structure schematic diagram for setting solution sealing mechanism in Fig. 1.

Wherein：

1 top connection,

2 upper center tubes,

3 lower center tubes,

4 jointings,

5 lower contacts, 51 spiral grooves,

6 exterior central tubes, 61 first outer lug boss, 611 second inlet openings,

7 balanced controls,

71 first dummy piston sets, 711 first inlet openings,

72 first dummy pistons,

73 second dummy piston sets, 731 the 4th inlet openings,

74 second dummy pistons,

75 pressure caps,

76 the 3rd inlet openings,

Glue tube base on 8,

9 packing elements,

10 lower rubber cylinder seats,

11 set solution sealing mechanism,

111 first set piston bush,

112 first set piston,

113 second set piston bush,

114 second set piston,

115 startups set pin,

116 lock tubes,

117 set pin,

118 support rings,

119 deblocking pins,

1110 lock rings,

1111 closing pieces,

1112 the 5th inlet openings,

1113 the 6th inlet openings,

12 first annular spaces,

13 O-ring seals,

14 spacer rings.

Specific embodiment

It is to make the purpose of this utility model, technical scheme and advantage clearer, new to this practicality below in conjunction with accompanying drawing Type embodiment is described in further detail.

As shown in figure 1, and illustrate with reference to Fig. 2 to Fig. 3, this utility model embodiment provide a kind of packer, should Packer include top connection 1, upper center tube 2, lower center tube 3, jointing 4, lower contact, exterior central tube 6, balanced controls 7, on Glue tube base 8, at least one packing element 9, lower rubber cylinder seat 10 and set solution sealing mechanism 11；

Upper center tube 2 is arranged on inside the lower end of top connection 1, and is tightly connected between upper center tube 2 and top connection 1, under Central canal 3 is fixed on outside the lower end of upper center tube 2, and jointing 4 is fixed on outside the lower end of lower center tube 3, and lower contact is solid It is scheduled on outside the lower end of union joint, balanced controls 7 are fixed on outside the lower end of top connection 1, exterior central tube 6 is arranged on balanced controls Between 7 and upper center tube 2, and exterior central tube 6 is stretched out from the lower end of balanced controls 7, shape between exterior central tube 6 and upper center tube 2 Into first annular space 12, upper glue tube base 8 is fixed on the lower end of balanced controls 7, and at least one packing element 9 is sequentially sleeved in from top to bottom On exterior central tube 6, lower rubber cylinder seat 10 is fixed on outside the lower end of exterior central tube 6, and set solution sealing mechanism 11 be fixed on lower rubber cylinder Outside the lower end of seat 10；

Process is set, solution sealing mechanism 11 is set and is driven lower rubber cylinder seat 10 up and compress at least one packing element 9；

Deblocking process, sets solution sealing mechanism 11 and drives lower rubber cylinder seat 10 descending and discharge at least one packing element 9；

After packer setting, the active force being subject to by the upper glue tube base 8 of the balance of balanced controls 7 and lower rubber cylinder seat 10, in case Only at least one packing element 9 is up or moves down.

In this utility model embodiment, top connection 1 and lower contact are respectively used to connect the oil in the oil well of two oil reservoirs Pipe, and be threaded connection between the oil pipe of top connection 1 and upper strata oil well, pass through spiral shell between the oil pipe of lower contact and lower floor's oil well Stricture of vagina connects, when this utility model is set between sleeve pipe and oil pipe, will be upper by least one packing element 9 of the present utility model The oil jacket annular space of layer oil well is separated with the oil jacket annular space of lower floor's oil well, to construct to upper strata oil well.

Upper glue tube base 8 is fixed on the lower end of balanced controls 7, and at least one packing element 9 is enclosed within exterior central tube 6 from top to bottom, Lower rubber cylinder seat 10 is fixed on the lower end of exterior central tube 6, sets solution sealing mechanism 11 and is fixed on outside the lower end of lower rubber cylinder seat 10, sets Solution sealing mechanism 11 realizes seat of the present utility model by 10 upstream or downstream of lower rubber cylinder seat, at least one packing element 9 of compression or release Envelope is unsealed.

After the completion of this utility model sets, by 7 balanced action of balanced controls on upper glue tube base 8 and lower rubber cylinder seat 10 Active force, and then prevent at least one packing element 9 up or move down, prevent at least one packing element 9 from being ground because up or moving down Damage.

This utility model by balanced controls 7 are arranged outside the lower end of top connection 1, after packer setting, by flat The active force being subject on the upper glue tube base 8 of weighing apparatus mechanism 7 balance and lower rubber cylinder seat 10, to prevent at least one packing element 9 up or move down, And then avoid when upper and lower both sides of the present utility model have pressure reduction, at least one packing element 9 is worn because up or moving down, and protects Service life of the present utility model is demonstrate,proved, and ensures sealing effectiveness of the present utility model.

Wherein, as shown in figure 1, packer also includes two spacer rings 14, the quantity of at least one packing element 9 is three, three Two packing elements 9 in packing element 9 are end packing element 9, and two end packing elements 9 are separately positioned on glue tube base 8 and lower rubber cylinder seat 10, three Another packing element 9 in packing element 9 be middle packing element 9, middle packing element 9 be arranged on two end packing elements 9 between, two spacer rings 14 are respectively provided with At the two ends of middle packing element 9.

Middle packing element 9 is prevented by two spacer rings 14 and is interfered between two end packing elements 9 of its both sides, protected The sealing effectiveness of three packing elements 9 of card.

As shown in Fig. 2 in this utility model embodiment, balanced controls 7 include that the first dummy piston set 71 and first is flat Weighing apparatus piston 72；

First dummy piston set 71 is arranged on outside the lower end of top connection 1, and the first dummy piston set 71 and top connection 1 it Between be tightly connected, the first dummy piston set 71 is provided with the first inlet opening 711, and the first inlet opening 711 connects the first dummy piston Inside set 71 and outside the upper end of packer；

First dummy piston 72 is arranged between the first dummy piston set 71 and exterior central tube 6, and is located at the first inlet opening 711 top, sealing between the first dummy piston 72 and the first dummy piston set 71 and exterior central tube 6 coordinate；

The outer wall of exterior central tube 6 is provided with the first outer lug boss 61, being radially provided with along exterior central tube 6 in the first outer lug boss 61 Second inlet opening 611, the second inlet opening 611 connect the first dummy piston set 71 inside above the first dummy piston 72 Space and first annular space 12, and lower rubber cylinder seat 10 or set solution sealing mechanism 11 be provided with the 3rd inlet opening 76, the 3rd feed liquor With first annular space 12 outside the lower end of the connection of hole 76 packer；

After packer setting, the first inlet openings of liquid Jing 711 outside packer upper end enter the first dummy piston set 71 It is internal in the space below the first dummy piston 72, the liquid outside packer lower end is by the 3rd inlet opening 76 successively Jing First annular space 12 and the second inlet opening 611 enter inside the first dummy piston set 71 above the first dummy piston 72 Space in；

If the fluid pressure outside packer upper end is more than the fluid pressure outside its lower end, the first dummy piston set 71 Internal liquid-driving the first dummy piston 72 in the space below the first dummy piston 72 is up, the first dummy piston 72 withstand in the first outer lug boss 61, to prevent lower rubber cylinder seat 10 descending；

If the fluid pressure outside packer lower end holds greatly the fluid pressure of outside, the first dummy piston set 71 thereon Internal the first dummy piston of liquid-driving 72 in the space above the first dummy piston 72 is descending and withstand on upper packing element On seat 8, to prevent gluing cylinder base 8 up.

In this utility model embodiment, the first dummy piston set 71 is respectively enterd by the liquid of this utility model both sides Inside, and cover behind 71 inside respectively positioned at the both sides of the first dummy piston 72 into the first dummy piston.When of the present utility model When both sides have pressure reduction up and down, if the fluid pressure outside packer upper end is more than the fluid pressure outside its lower end, packer Fluid pressure outside upper end is acted at least one packing element 9, and the active force being subject at least one packing element 9 is delivered to lower glue On cylinder base 10, the downward active force for causing to be subject on lower rubber cylinder seat 10 is larger, and it is unnecessary on lower rubber cylinder seat 10 to need to balance Downward active force, prevents lower rubber cylinder seat 10 from moving down, now, inside the first dummy piston set 71, positioned at the first dummy piston , more than the fluid pressure above the first dummy piston 72, the first dummy piston 72 is positioned at which for the pressure of the liquid below 72 It is up and withstand in the first outer lug boss 61 under the pressure effect of the liquid of lower section, apply active force upwards to exterior central tube 6, outward The active force upwards is delivered to and is fixed on the lower rubber cylinder seat 10 of its lower end by central canal 6, prevents lower rubber cylinder seat 10 from moving down, and As long as lower rubber cylinder seat 10 is not moved down, at least one packing element 9 is also due to a lack of moving down space without moving down, therefore will not grind Damage the arbitrary packing element 9 at least one packing element 9；If the fluid pressure outside packer upper end is less than the liquid pressure outside its lower end Power, the fluid pressure outside packer lower end are acted at least one packing element 9, the active force transmission at least one packing element 9 To on upper glue tube base 8, cause the active force upwards being subject on glue tube base 8 larger, it is unnecessary on glue tube base 8 to need to balance Active force upwards, prevent glue tube base 8 up, now, the first dummy piston set 71 inside, positioned at the first dummy piston , more than the fluid pressure above the first dummy piston 72, the first dummy piston 72 is positioned at which for the pressure of the liquid above in the of 72 Move down and withstand on glue tube base 8 under the pressure effect of the liquid of top, downward active force is applied to upper glue tube base 8, is prevented Upper glue tube base 8 is up, as long as and upper glue tube base 8 does not occur up, at least one packing element 9 also cannot be gone up due to a lack of upstream space OK, thus the arbitrary packing element 9 that will not wear and tear at least one packing element 9.

As shown in Fig. 2 in this utility model embodiment, balanced controls 7 also include that the second dummy piston set 73, second is flat Weighing apparatus piston 74 and pressure cap 75；

Second dummy piston set 73 is fixed on outside the upper end of the first dummy piston set 71, and the second dummy piston set 73 Upper end is fixed on outside the lower end of top connection 1, and the lower end of the second dummy piston set 73 is provided with the 4th inlet opening 731, the 4th feed liquor Hole 731 is connected inside the second dummy piston set 73 and outside the upper end of packer；

Second dummy piston 74 is arranged between the second dummy piston set 73 and exterior central tube 6, and is located at the 4th inlet opening Above in the of 731, sealing between the second dummy piston 74 and the second dummy piston set 73 and exterior central tube 6 coordinates；

Pressure cap 75 is fixed on the upper end of exterior central tube 6, inside the second dummy piston set 73 positioned at the second dummy piston 74 The space of top is connected with first annular space 12.

Liquid in this utility model embodiment, after this utility model sets, outside this utility model upper end The 4th inlet openings 731 of Jing enter inside the second dummy piston set 73 in the space below the second dummy piston 74, be located at The 3rd inlet openings 76 of liquid Jing and first annular space 12 outside this utility model lower end is entered in the second dummy piston set 73 Portion in the space above the second dummy piston 74.

If the fluid pressure outside this utility model upper end is more than the fluid pressure outside its lower end, namely in the second balance In piston bush 73, the pressure of the liquid in the space below the second dummy piston 74 is more than on the second dummy piston 74 The pressure of the liquid in the space of side, the second dummy piston 74 are up and withstand under the pressure effect of the liquid being disposed below The lower end of pressure cap 75, as pressure cap 75 is fixedly connected with exterior central tube 6, and the lower end of exterior central tube 6 is fixed with lower rubber cylinder seat 10 Connection, therefore the second balance that the fluid pressure outside this utility model upper end can pass through in balanced controls of the present utility model 7 is lived Plug 74, pressure cap 75 and exterior central tube 6 are delivered on lower rubber cylinder seat 10, active force upwards is produced to lower rubber cylinder seat 10, is prevented down Glue tube base 10 is moved down.

If the fluid pressure outside this utility model lower end holds greatly the fluid pressure of outside thereon, namely in the second balance In piston bush 73, the pressure of the liquid in the space below the second dummy piston 74 is less than on the second dummy piston 74 The pressure of the liquid in the space of side, the second dummy piston 74 are moved down under the pressure effect of the liquid being positioned above and are withstood on The upper end of the second dummy piston set 73, as the second dummy piston set 73 is fixedly connected with upper glue tube base 8, therefore under this utility model The pressure of the liquid outside end can pass sequentially through second dummy piston 74 and the first balance of balanced controls of the present utility model 7 and live Plug sleeve 71 is delivered on glue tube base 8, produces downward active force to upper glue tube base 8, prevents glue tube base 8 up.

This utility model aids in first dummy piston with pressure cap 75 by the 73, second dummy piston of the second dummy piston set 74 The active force being subject on set 71 and the upper glue tube base 8 of the balance of the first dummy piston 72 and lower rubber cylinder seat 10, in this utility model upper end Outside fluid pressure prevents lower rubber cylinder seat 10 from moving down when being more than the fluid pressure outside its lower end, outside this utility model lower end The fluid pressure in portion prevents glue tube base 8 up when holding greatly the fluid pressure of outside thereon, and then prevents at least one packing element 9 It is up or move down, it is to avoid the arbitrary packing element 9 at least one packing element 9 is worn because up or moving down.

As shown in figure 3, also can be found in Fig. 1, in this utility model embodiment, setting solution sealing mechanism 11 includes：First sits Envelope piston bush 111, first set piston 112, second set piston bush 113, second set piston 114, startup set pin 115th, lock tube 116, set pin 117, support ring 118, lock ring 1110 conciliate offset nail 119；

First upper end for setting piston bush 111 is fixed on outside the lower end of lower rubber cylinder seat 10, and first sets piston 112 is arranged Set between piston bush 111 and upper center tube 2 first, and positioned at the upper end of lower center tube 3, first sets piston 112 and One sets between piston bush 111 and upper center tube 2 sealing coordinates, and the lower end of upper center tube 2 is provided with the 5th inlet opening 1112, and the 5th Inlet opening 1112 is connected inside upper center tube 2 and first sets setting below piston 112 positioned at first inside piston bush 111 Space, second sets piston bush 113 is fixed on outside the first lower end for setting piston bush 111, and second sets piston 114 is arranged on Second sets between piston bush 113 and lower center tube 3, and positioned at the top of jointing 4, the side wall of lower center tube 3 is provided with 6th inlet opening 1113, the inside of the connection exterior central tube 6 of the 6th inlet opening 1113 and second sets in piston bush 113 positioned at second Set the space below piston 114, startup sets pin 115 and set by second and set through second on the side wall of piston bush 113 Piston bush 113 sets piston 114 with second and is fixedly connected, and lock tube 116 is fixed on inside the second lower end for setting piston bush 113, Lock tube 116 is provided with internal tooth, and support ring 118 is fixed on the lateral wall of jointing 4 by unsealing pin 119, lock ring 1110 It is fixed on jointing 4 by support ring 118, lock ring 1110 is provided with the external tooth coordinated with the internal tooth on lock tube 116；

Process is set, liquid sets piston bush 113 in position into second by the 6th inlet opening 1113 of 3 inside of lower center tube Set the space below piston 114 in second, promoting second, to set piston 114 up, second set piston 114 it is up during Make startup set pin 115 to cut off, second set piston 114 continue it is up to promote first, to set piston bush 111 up, first Set piston bush 111 to drive second to set piston bush 113 up, second sets piston bush 113 drives lock tube 116 up, lock tube 116 it is up during make to set pin 117 and cut off, when lock tube 116 go upward to the position of lock ring 1110 to it is corresponding when lock tube 116 On internal tooth be engaged with the external tooth on lock ring 1110 and lock the second relative position for setting piston bush 113 and jointing 4, and When first set piston bush 111 it is up during, liquid is set into first by the 5th inlet opening 1112 of 2 inside of upper center tube The 111 interior space set positioned at first below piston 112 of piston bush, piston 112 is up to promote first to set, and first sets piston 112 it is up during promote lower rubber cylinder seat 10 up and compress at least one packing element 9；

Pressure release in deblocking process, upper center tube 2 and lower center tube 3, above puts on joint 1, and top connection 1 drives center successively Pipe 2, lower center tube 3 and jointing 4 are up, are cut off deblocking pin 119, support ring 118 during jointing 4 is up Come off, lock tube 116 drive lock ring 1110 separate with jointing 4, second set piston bush 113, first set piston bush 111 and Lower rubber cylinder seat 10 is descending, discharges at least one packing element 9.

In this utility model embodiment, when needing this utility model to be set in sleeve pipe, lower floor's oil well is blocked Oil pipe, is hung over this utility model on internal surface of sleeve pipe by slips, is suppressed into the oil pipe of upper strata, the 6th inlet openings 1113 of liquid Jing Set below piston 114 into second, second sets piston 114 under the pressure effect of liquid cuts off startup and set pin 115 And it is up, liquid continues on through the 6th inlet opening 1113 and sets to promote inside piston bush 113 into second and second sets on piston 114 OK, when second set piston 114 go upward to withstand on lower end that first sets piston bush 111 when, first sets piston bush 111 drives Lower rubber cylinder seat 10 and exterior central tube 6 are up, and as balanced controls 7 are fixed on the lower end of top connection 1, upper glue tube base 8 is fixed on flat The lower end of weighing apparatus mechanism 7, therefore the position of upper glue tube base 8 will not change, during lower rubber cylinder seat 10 is up with exterior central tube 6 Lower rubber cylinder seat 10 and 8 at least one packing element 9 of common compression of upper glue tube base, expand at least one packing element 9, while first sets work Plug sleeve 111 sets the active force that piston bush 113 applies upwards to lock tube 116 by second, cuts off lock tube 116 and sets pin 117 and it is up, when at least one packing element 9 compresses to a certain extent, on lock tube 116 is corresponding with the position of lock ring 1110, lock tube 116 are engaged with lock ring 1110, and locking second sets the relative position between piston bush 113 and jointing 4, prevents lower rubber cylinder seat 10 is descending, after keeping the expansive force of at least one packing element 9, lock tube 116 to be fully engaged against with lock ring 1110, sets and completes, upper strata oil In the oil pipe of well can pressure release carrying out well construction.

And in this utility model embodiment, also the 5th inlet openings 1112 of Jing of the liquid inside upper center tube 2 enter first Set inside piston bush 111, it is up that liquid-driving first sets piston 112, first sets piston 112 promotes on lower rubber cylinder seat 10 Go and compress at least one packing element 9.

When needing to unseal this utility model, joint 1, top connection 1 are above put in pressure release in the oil pipe of upper strata oil well Drive upper center tube 2 is up, and upper center tube 2 drives lower center tube 3 and jointing 4 up successively, 4 up process of jointing In cut off deblocking pin 119, support ring 118 comes off, so that lock ring 1110 is separated with jointing 4, with 4 points of jointing From lock ring 1110 keep the state that is engaged with lock tube 116, lower rubber cylinder seat 10, first set piston bush 111 and second and set work Plug sleeve 113 is descending under the elastic force effect of at least one packing element 9, so that at least one packing element 9 discharges, realizes deblocking.

This utility model sets the setting of pin 115 by starting, it is to avoid this utility model midway sets, and passes through first Set piston bush 111 and first to set the auxiliary of piston 112 second and set piston bush 113 and second set piston 114 and set, The speed that realization sets is very fast, and production efficiency is higher.

Wherein, the shear strength of pin 115 is set less than setting pin 117 it will be understood by those skilled in the art that starting Shear strength.

As shown in figure 3, in this utility model embodiment, setting solution sealing mechanism 11 also includes closing piece 1111, and second sets The inwall of piston bush 113 is provided with inner convex platform, and the upper end inwall of jointing 4 is provided with step, the upper surface top of jointing 4 On inner convex platform, the second lower end for setting piston 114 is sitting on the step formed in the upper end of jointing 4, and second sets The outer wall of piston 114 is fitted with the inwall of jointing 4, and the second inwall for setting piston bush 113 is provided with groove, jointing 4 upper end side wall is provided with through hole, and one end of closing piece 1111 is arranged in groove, and the other end withstands on second through through hole and sets work On the lateral wall of plug 114；

Second sets piston 114 when going upward to predeterminated position, and closing piece 1111 is by coming off in through hole.

Groove is set on the inwall of piston bush 113 by setting second, on the upper end side wall of jointing 4, arranges logical Cross, one end of closing piece 1111 is arranged in groove, the other end withstands on second through the through hole on jointing 4 and sets piston 114 On, closing piece 1111 only sets when piston 114 goes upward to predeterminated position second and can just come off, and prevents second to set piston 114 Set pin 115 and drive second to set piston bush 113 up by starting during up, cause second to set piston bush 113 Drive lock tube 116 up and cut off and set pin 117, cause this utility model the situation that midway sets occur.Wherein, preferably Ground, second sets piston 114 goes upward to predeterminated position and refers to that the second upper end for setting piston 114 withstands on first and sets piston bush 111 Lower end state.

As shown in figure 1, in this utility model embodiment, between upper center tube 2 and top connection 1, upper glue tube base 8 with it is outer in O-ring seal 13 is equipped between heart pipe 6 and between lower rubber cylinder seat 10 and exterior central tube 6, is sealed by O-ring seal 13 Gap between central canal 2 and top connection 1, prevents the liquid inside upper center tube 2 by between upper center tube 2 and top connection 1 Gap is flow to outside upper center tube 2, by the upper gap between glue tube base 8 and exterior central tube 6 of the sealing of O-ring seal 13, it is to avoid, Gap between upper glue tube base 8 and exterior central tube 6 and between lower rubber cylinder seat 10 and exterior central tube 6.

As shown in figure 1, in this utility model embodiment, between the upper end of the first dummy piston set 71 and exterior central tube 6, First dummy piston 72 and the first dummy piston are covered between 71, the first dummy piston is covered between 71 and exterior central tube 6, top connection 1 Between the second dummy piston set 73, between the second dummy piston 74 and exterior central tube 6, the second dummy piston 74 balanced with second Between piston bush 73, first set piston 112 and first set between piston bush 111, first sets piston 112 and upper center tube Between 2, lower center tube 3 and first set between piston bush 111, second set piston 114 and second set piston bush 113 it Between, second set between piston 114 and lower center tube 3, jointing 4 and second set between piston bush 113, upper center tube 2 It is equipped between top connection 1, between upper glue tube base 8 and exterior central tube 6 and between lower rubber cylinder seat 10 and exterior central tube 6 O-shaped Sealing ring 13, prevents liquid crossfire, it is ensured that using effect of the present utility model.

Wherein it is preferred to, between upper center tube 2 and top connection 1, between lower rubber cylinder seat 10 and exterior central tube 6, second balance Between piston bush 73 and top connection 1, the first dummy piston set 71 and second dummy piston set 73 between, the first dummy piston set 71 Between upper glue tube base 8, between pressure cap 75 and exterior central tube 6, first set between piston bush 111 and lower rubber cylinder seat 10, in upper Between heart pipe 2 and lower center tube 3, second set piston bush 113 and first set between piston bush 111, lower center tube 3 be connected Between joint 4, lock tube 116 and second set between piston bush 113 and connected by screw thread between lock tube 116 and jointing 4 Fixation is connect, simple structure is easy to assembly and disassembly.

And as shown in figure 1, in this utility model embodiment, it is spiral recessed that the outer wall of lower contact is provided with least one Groove 51.

In this utility model embodiment, during the top of lower contact is cylinder, middle part be it is coniform, lower end be it is cylindric, At least one spiral groove 51 is set on the outer wall on the top and middle part of lower contact, on the premise of it can cross liquid, by under Joint carries out righting to this utility model.Wherein, it is solid with the oil pipe of lower floor's oil well that external screw thread is set on the lower end outer wall of lower contact It is fixed to connect.

Preferred embodiment of the present utility model is the foregoing is only, it is not to limit this utility model, all in this practicality Within new spirit and principle, any modification, equivalent substitution and improvements made etc. should be included in guarantor of the present utility model Within the scope of shield.

Claims (10)

1. a kind of packer, it is characterised in that the packer include top connection, upper center tube, lower center tube, jointing, Lower contact, exterior central tube, balanced controls, upper glue tube base, at least one packing element, lower rubber cylinder seat and set solution sealing mechanism；

The upper center tube is arranged on inside the lower end of the top connection, and is sealed between the upper center tube and the top connection Connection, the lower center tube are fixed on outside the lower end of the upper center tube, and the jointing is fixed on the lower center tube Lower end outside, the lower contact is fixed on outside the lower end of the union joint, and the balanced controls are fixed on the top connection Lower end outside, the exterior central tube is arranged between the balanced controls and the upper center tube, and the exterior central tube from The lower end of the balanced controls is stretched out, and forms first annular space between the exterior central tube and the upper center tube, it is described on Glue tube base is fixed on the lower end of the balanced controls, and at least one packing element is sequentially sleeved in the exterior central tube from top to bottom On, the lower rubber cylinder seat is fixed on outside the lower end of the exterior central tube, and the solution sealing mechanism that sets is fixed on the lower glue Outside the lower end of cylinder base；

Process is set, the solution sealing mechanism that sets drives the lower rubber cylinder seat up and compresses at least one packing element；

Deblocking process, the solution sealing mechanism that sets drive the lower rubber cylinder seat descending and discharge at least one packing element；

After the packer setting, by acting on that the balanced controls balance upper glue tube base and the lower rubber cylinder seat are subject to Power, to prevent at least one packing element up or move down.

2. packer according to claim 1, it is characterised in that the balanced controls include the first dummy piston set and the One dummy piston；

First dummy piston is set on outside the lower end of the top connection, and the first dummy piston set with it is described on It is tightly connected between joint, first dummy piston puts and is provided with the first inlet opening, first inlet opening connection described the Outside the upper end of one dummy piston set inside and the packer；

First dummy piston is arranged between the first dummy piston set and the exterior central tube, and is located at described first The top of inlet opening, sealing between first dummy piston and first dummy piston set and the exterior central tube coordinate；

The outer wall of the exterior central tube is provided with the first outer lug boss, and the radial direction in first outer lug boss along the exterior central tube sets Have the second inlet opening, second inlet opening connect inside the first dummy piston set on first dummy piston The space and the first annular space of side, and the lower rubber cylinder seat or the solution sealing mechanism that sets are provided with the 3rd inlet opening, 3rd inlet opening connect outside the lower end of the packer with the first annular space；

After the packer setting, the first inlet opening described in the liquid Jing outside the packer upper end is into the described first balance Inside piston bush in the space below first dummy piston, the liquid outside the packer lower end is by described The three inlet openings position that first annular space described in Jing and second inlet opening are entered inside first dummy piston set successively In the space above first dummy piston；

If the fluid pressure outside the packer upper end is more than the fluid pressure outside its lower end, first dummy piston First dummy piston described in the liquid-driving in the space below first dummy piston inside set is up, and described the One dummy piston is withstood in first outer lug boss, to prevent the lower rubber cylinder seat descending；

If the fluid pressure of the packer lower outer holds greatly the fluid pressure of outside, first dummy piston thereon First dummy piston described in the liquid-driving in the space above first dummy piston inside set is descending and withstand on On the upper glue tube base, to prevent the upper glue tube base up.

3. packer according to claim 2, it is characterised in that the balanced controls also include the second dummy piston set, Second dummy piston and pressure cap；

The second dummy piston set is fixed on outside the upper end of the first dummy piston set, and the second dummy piston set Upper end be fixed on outside the lower end of the top connection, the lower end of second dummy piston set is provided with the 4th inlet opening, described 4th inlet opening is connected outside the internal upper end with the packer of the second dummy piston set；

Second dummy piston is arranged between the second dummy piston set and the exterior central tube, and is located at the described 4th Above inlet opening, sealing between second dummy piston and second dummy piston set and the exterior central tube coordinates；

The pressure cap is fixed on the upper end of the exterior central tube, balancing positioned at described second inside the second dummy piston set Space above piston is connected with the first annular space.

4. packer according to claim 3, it is characterised in that the upper end of the first dummy piston set with it is described it is outer in Between heart pipe, between first dummy piston and first dummy piston set, the first dummy piston set it is outer with described Between central canal, between the top connection and second dummy piston set, second dummy piston and the exterior central tube Between and second dummy piston and second dummy piston set between be equipped with O-ring seal.

5. packer according to claim 1, it is characterised in that the solution sealing mechanism that sets includes：First sets piston Set, first set piston, second set piston bush, second set piston, startup set pin, lock tube, set pin, support Ring, lock ring conciliate offset nail；

First upper end for setting piston bush is fixed on outside the lower end of the lower rubber cylinder seat, and described first sets piston setting Set between piston bush and the upper center tube described first, and positioned at the upper end of the lower center tube, described first sets Piston and described first sets sealing cooperation between piston bush and the upper center tube, and the lower end of the upper center tube is provided with the 5th Inlet opening, the 5th inlet opening connect inside the upper center tube and described first set inside piston bush positioned at described the One sets the space below piston, and described second sets piston bush is fixed on described first and sets outside the lower end of piston bush, institute State second and set piston and be arranged on described second and set between piston bush and the lower center tube, and positioned at the jointing Top, the side wall of the lower center tube are provided with the 6th inlet opening, and the 6th inlet opening connects the inside of the exterior central tube And described second set in piston bush and set space below piston positioned at described second, the startup sets pin by described the Piston bush is set through described second on the two side walls for setting piston bush piston is set with described second be fixedly connected, the lock tube It is fixed on described second to set inside the lower end of piston bush, the lock tube is provided with internal tooth, and the support ring is by the deblocking Pin is fixed on the lateral wall of the jointing, and the lock ring is fixed on the jointing by the support ring, The lock ring is provided with the external tooth coordinated with the internal tooth on the lock tube；

Process is set, liquid the 6th inlet opening by described in Jing inside the lower center tube sets position in piston bush into described second The space below piston is set in described second, promotes described second to set piston stroking upward, described second sets piston stroking upward mistake Make the startup set pin to cut off in journey, described second sets piston continues up to promote described first to set on piston bush OK, described first set piston bush and drive described second to set piston bush up, described second sets piston bush drives the lock Set is up, make during the lock tube is up it is described set pin and cut off, when the lock tube goes upward to the position with the lock ring Internal tooth on lock tube during correspondence is engaged with the external tooth on the lock ring and is locked described second and piston bush is set with the company The relative position of joint, and when described first set piston bush it is up during, liquid is by Jing institutes inside the upper center tube State the 5th inlet opening and set in piston bush into described first and space below piston is set positioned at described first, promote described the One sets piston stroking upward, described first set piston stroking upward during promote the lower rubber cylinder seat up and at least one described in compressing Individual packing element；

Pressure release in deblocking process, the upper center tube and the lower center tube, above proposes the top connection, top connection band successively The dynamic upper center tube, the lower center tube and the jointing are up, and the solution is made during the jointing is up Offset nail is cut off, and the support ring comes off, and the lock tube drives the lock ring to separate with the jointing, and described second sets Piston bush, described first set piston bush and the lower rubber cylinder seat is descending, discharge at least one packing element.

6. packer according to claim 5, it is characterised in that the solution sealing mechanism that sets also includes closing piece, described the Two inwalls for setting piston bush are provided with inner convex platform, and the upper end inwall of the jointing is provided with step, the jointing Upper surface withstand on the inner convex platform, second lower end for setting piston be sitting in the jointing upper end formed On step, and the described second outer wall for setting piston is fitted with the inwall of the jointing, and described second sets piston bush Inwall is provided with groove, and the upper end side wall of the jointing is provided with through hole, and one end of the closing piece is arranged on the groove Interior, the other end withstands on described second through the through hole and sets on the lateral wall of piston；

Described second when setting piston stroking upward to predeterminated position, and the closing piece is by coming off in the through hole.

7. packer according to claim 6, it is characterised in that described first sets piston sets piston with described first Between set, described first set between piston and the upper center tube, the lower center tube with described first set piston bush it Between, described second set piston and described second set between piston bush, described second set piston and the lower center tube it Between and the jointing and described second set.

8. packer according to claim 1, it is characterised in that the outer wall of the lower contact is provided with least one spiral The groove of shape.

9. packer according to claim 1, it is characterised in that the packer also includes two spacer rings, it is described at least The quantity of one packing element is three, and two packing elements in three packing elements are end packing element, and described two end packing elements are respectively provided with On described on glue tube base and the lower rubber cylinder seat, another packing element in three packing elements is middle packing element, the middle packing element It is arranged between described two end packing elements, described two spacer rings are separately positioned on the two ends of the middle packing element.

10. the packer according to claim 1-9 any one claim, it is characterised in that the upper center tube and institute State between top connection, between the upper glue tube base and the exterior central tube and between the lower rubber cylinder seat and the exterior central tube It is equipped with O-ring seal.