CN104314511B - A kind of compression underseal packer - Google Patents
A kind of compression underseal packer Download PDFInfo
- Publication number
- CN104314511B CN104314511B CN201410633636.XA CN201410633636A CN104314511B CN 104314511 B CN104314511 B CN 104314511B CN 201410633636 A CN201410633636 A CN 201410633636A CN 104314511 B CN104314511 B CN 104314511B
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- slips
- packer
- wiper block
- cone
- pole
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- 230000006835 compression Effects 0.000 title claims abstract description 17
- 238000007906 compression Methods 0.000 title claims abstract description 17
- 238000012856 packing Methods 0.000 claims abstract description 32
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000004576 sand Substances 0.000 description 25
- 239000012530 fluid Substances 0.000 description 11
- 238000005406 washing Methods 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003978 infusion fluid Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
- E21B33/1295—Packers; Plugs with mechanical slips for hooking into the casing actuated by fluid pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention belongs to production gas technology field, oil field, a kind of compression underseal packer of concrete offer, including the commutation righting mechanism, anchor mechanism and the sealing mechanism that are sequentially connected with from bottom to top, described commutation righting mechanism is made up of lower contact, guiding centre pipe, guide finger, guide finger carrier, wiper block, wiper block carrier and spring, described anchor mechanism is made up of slips box, slips, slips spring and cone, and described sealing mechanism is made up of lower side ring, outer packing element, central tube, interior packing element, interior center-pole, pressure cap.This invention is compared with conventional fracturing packer, and efficiency of construction is high, can meet packer and once go into the well the requirement of drag fracturing multistage, and overcome multiple trips increases operating cost and the problem of operating risk simultaneously.
Description
Technical field
The invention belongs to production gas technology field, oil field, be specifically related to a kind of compression underseal packer, it is adaptable to Oil/gas Well drags fracturing reform piecemeal.
Background technology
Oil field routine fracturing packer is used as during underseal pressure break to there are problems, is mainly manifested in following two aspect: one is that packer can exist pressure reduction up and down after pressure break, is unfavorable for that packing element bounce back, causes deblocking difficult；Two inevitably have fracturing sand when being pressure break deposits on packer, packer can be caused to be difficult to unseal, now need circulation well cleanup sand washing, but owing to packer top has fluid course (fracturing fluid outlet) can form short circuit, sand cleaning fluid involves the sand setting above less than packing element, causes sand washing effect undesirable.So conventional fracturing packer is when making underseal packer and using, efficiency of construction is the lowest, it is impossible to meeting packer and once go into the well the requirement of drag fracturing multistage, multiple trips not only can increase operating cost, and operating risk also can be made to increase.
Summary of the invention
It is an object of the invention to overcome in prior art conventional fracturing packer when making underseal packer and using, efficiency of construction is low, it is impossible to meets packer and once goes into the well the problem of drag fracturing multistage requirement.
To this end, the invention provides a kind of compression underseal packer, including the commutation righting mechanism, anchor mechanism and the sealing mechanism that are sequentially connected with from bottom to top；
Described commutation righting mechanism is by lower contact, guiding centre pipe, guide finger, guide finger carrier, wiper block, wiper block carrier and spring composition, described lower contact upper end is connected with guiding centre pipe lower end, described guiding centre pipe lower end outer wall is provided with " W " type commutation shallow slot, described guide finger carrier lower end is provided with an internal thread hole, described internal thread hole is corresponding with " W " type of guiding centre pipe commutation shallow slot position, described guide finger is fixed in the internal thread hole of guide finger carrier, described guide finger carrier upper end is connected with wiper block carrier lower end, described wiper block carrier outer wall is uniformly distributed four wiper block grooves vertically, described four wiper block grooves are respectively provided with a wiper block, it is provided with spring in the middle of described wiper block and wiper block groove；
Described anchor mechanism is made up of slips box, slips, slips spring and cone, described slips box lower end is connected with wiper block carrier upper end, described slips box upper end inwall is uniformly distributed four arc-shaped slots vertically, a slips respectively it is fixed with in described four arc-shaped slots, described slips upper end fits with cone lower end, and described slips spring is arranged on slips；
Described sealing mechanism is made up of lower side ring, outer packing element, central tube, interior packing element, interior center-pole, pressure cap, described lower side ring lower end is connected with cone upper end, described outer packing element is enclosed within central tube lower end outer wall, described outer packing element lower end fits with lower side ring upper end, described central tube lower end is connected with guiding centre pipe upper end, described interior center-pole is placed in central tube, and its lower end connects pressure cap, and described interior packing element is placed between interior center-pole and central tube.
Above-mentioned interior center-pole is cylindrical, and is from top to bottom divided into upper, middle and lower segment, and its external diameter diminishes successively, by taper seat gentle transition between stage casing and hypomere.
Above-mentioned interior center-pole epimere has centre bore in the most through two-stage, has a steel ball, interior center-pole epimere outer wall to be uniformly distributed 4 liquid flow holes connected with interior centre bore at interior centre bore reducing.
Above-mentioned central tube is cylinder, and its external diameter is up big and down small, and internal orifice dimension is up big and down small, and endoporus is by taper seat gentle transition.
The taper seat of above-mentioned interior center-pole is identical with the gradient of the taper seat of central tube endoporus.
Above-mentioned lower side ring is cylindrical shape, and its upper-end inner diameter is little, and bottom diameter is big and has internal thread to be connected with cone.
The groove width of the arc-shaped slot of above-mentioned slips box is consistent with slips width, and arc-shaped slot lower end connects with slips outer box wall.
Above-mentioned guiding centre pipe outer wall is distributed multiple equal diameter through hole.
Above-mentioned lower contact hypomere is for carrying externally threaded little cylinder, and stage casing is cone, and epimere is tapped great circle cylinder, and large cylinder is external is evenly equipped with 6 " u "-shaped guiding gutters vertically.
Above-mentioned cone upper end is cylindrical shape, and lower end is cone, and described slips 1 upper end is the conical surface, and the conical surface of cone is identical with the conical surface gradient of slips.
Beneficial effects of the present invention:
(1) present invention is when deblocking by upper lifting pipe post, makes interior packing element solution be honored as a queen, and fluid can be entered into below packer by the annular space of interior center-pole Yu central tube, so that packer two-way pressure balance, is beneficial to deblocking.
(2) when running into sand card situation, can be under conditions of closing oil jacket annular space, sand cleaning fluid is injected from oil pipe, sand cleaning fluid can enter into the annular space of itself and interior center-pole by the inlet opening from central tube, again from the sand washing passage of central tube out, thus the sand setting on packer is flushed to below packer, release packer sand card.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
Fig. 1 is compression underseal packer construction schematic diagram of the present invention.
Fig. 2 is the present invention " W " type commutation shallow slot schematic diagram.
Fig. 3 is slips box axial cross-sectional views in the present invention.
Fig. 4 is the generalized section in Fig. 3 along A-A direction.
Description of reference numerals: 1, interior center-pole；2, interior packing element；3, central tube；4, outer packing element；5, lower side ring；6, cone；7, slips spring；8, slips box；9, spring；10, wiper block carrier；11, guide finger carrier；12, guiding centre pipe；13, lower contact；14, pressure cap；15, slips；16, wiper block；17, guide finger；18, steel ball；19, interior centre bore；20, liquid flow hole；21, guiding gutter.
Detailed description of the invention
Embodiment 1:
In order to overcome in prior art conventional fracturing packer when making underseal packer and using, efficiency of construction is low, packer can not be met once go into the well the problem of drag fracturing multistage requirement, present embodiments provide a kind of compression underseal packer as shown in Figure 1, Figure 2, Figure 3 shows, including the commutation righting mechanism, anchor mechanism and the sealing mechanism that are sequentially connected with from bottom to top；
nullDescribed commutation righting mechanism is by lower contact 13、Guiding centre pipe 12、Guide finger 17、Guide finger carrier 11、Wiper block 16、Wiper block carrier 10 and spring 9 form，Described lower contact 13 upper end is connected with guiding centre pipe 12 lower end，Described guiding centre pipe 12 lower end outer wall is provided with " W " type commutation shallow slot，Described guide finger carrier 11 is cylinder，There is internal thread its upper end，Guide finger carrier 11 lower end is provided with an internal thread hole，Described internal thread hole is corresponding with " W " type of guiding centre pipe 12 commutation shallow slot position，Described guide finger 17 is fixed in the internal thread hole of guide finger carrier 11，Described guide finger carrier 11 upper end is connected with wiper block carrier 10 lower end，Described wiper block carrier 10 outer wall is uniformly distributed four wiper block grooves vertically，Described four wiper block grooves are respectively provided with a wiper block 16，Described wiper block 16 is provided with spring 9 in the middle of wiper block groove，Wiper block can be axially expanded and shrink；
Described anchor mechanism is made up of slips box 8, slips 15, slips spring 7 and cone 6, described slips box 8 lower end is connected with wiper block carrier 10 upper end, described slips box 8 upper end inwall is uniformly distributed four arc-shaped slots vertically, a slips 15 respectively it is fixed with in described four arc-shaped slots, described slips 15 upper end fits with cone 6 lower end, and described slips spring 7 is arranged on slips 15；
Described sealing mechanism is made up of lower side ring 5, outer packing element 4, central tube 3, interior packing element 2, interior center-pole 1, pressure cap 14, described lower side ring 5 lower end is connected with cone 6 upper end, described outer packing element 4 is enclosed within central tube 3 lower end outer wall, described outer packing element 4 lower end fits with lower side ring 5 upper end, described central tube 3 lower end is connected with guiding centre pipe 12 upper end, described interior center-pole 1 is placed in central tube 3, and its lower end connects pressure cap 14, and described interior packing element 2 is placed between interior center-pole 1 and central tube 3.
And wherein, described interior center-pole 1 is cylindrical, and from top to bottom it is divided into upper, middle and lower segment, its external diameter diminishes successively, and by taper seat gentle transition between stage casing and hypomere, described interior center-pole 1 epimere has centre bore 19 in the most through two-stage, a steel ball 18 is had at interior centre bore 19 reducing, interior center-pole 1 epimere outer wall is uniformly distributed the liquid flow hole 20 that 4 Φ 10mm connect with interior centre bore, and interior center-pole 1 lower end has external screw thread to be connected with pressure cap 14, and upper end has internal thread to be connected with oil pipe.
Described interior packing element 2 is cylindrical shape, and lower end falls 45 jiaos, and interior packing element 2 is enclosed within interior center-pole 1 stage casing, and fixes with industry adhesive with interior center-pole 1.
Described central tube 3 is cylinder, and its external diameter is up big and down small, and central tube 3 endoporus is divided into two sections, and internal orifice dimension is up big and down small, and endoporus is by taper seat gentle transition, and the taper seat of described interior center-pole 1 is identical with the gradient of the taper seat of central tube 3 endoporus；The liquid flow hole of described central tube 3 top axial 4 Φ 10mm of distribution.
Described lower side ring 5 is cylindrical shape, and its upper-end inner diameter is little, and bottom diameter is big and has internal thread to be connected with cone 6.
Described pressure cap 14 is cylinder, has internal thread, upper and lower two ends to fall 45 jiaos.
Described slips box 8 is cylindrical shape, and the groove width of the arc-shaped slot of slips box 8 is identical with slips 15 width, and for stationary slip 15, and arc-shaped slot lower end connects with slips box 8 outer wall.
Described wiper block carrier 10 is cylinder, and its upper end has external screw thread, lower end to have external screw thread and guide finger carrier 11 upper end to connect.
Joining a slips spring 7 on described slips 15, slips spring 7 is plain cylindrical form spring；Described cone 6 upper end is cylindrical shape, lower end is cone, described slips 15 upper end is the conical surface, and the conical surface of cone 6 is consistent with the conical surface gradient of slips 15, when transferring packer, cone 6 will be pushed slips 15 open, realize packer grappling, when carrying packer on when, cone 6 departs from slips 15, and grappling releases.
Described guiding centre pipe 12 outer wall is distributed multiple equal diameter through hole, is used for linking up guiding centre pipe 12 inside and outside wall, as sand washing passage and pilot passage.
Described lower contact 13 hypomere is for carrying externally threaded little cylinder, and stage casing is cone, and epimere is tapped great circle cylinder, and large cylinder is external is evenly equipped with 6 " u "-shaped guiding gutters 21 vertically.
Described guide finger 17 is cylinder, and there is external screw thread one end, is fixed on the little internal thread hole of guide finger carrier 11, and guide finger 17 can slide in " W " shape reversing groove, drives whole changement to shift one's position between elongated slot and short groove.
Embodiment 2:
On the basis of embodiment 1, the course of work of this compression underseal packer is as follows: the mode that sets of this packer is compression, employing puts put and sets, then on propose deblocking.
Set process:
When packer enters well, guide finger 17 is positioned at short track (D point) place of commutation shallow slot, now cone 6 does not contacts with slips 15, packer will not grappling, when down to predetermined setting depth, upper lifting pipe post 0.3m～0.4m, transfer tubing string again, guide finger 17 will be located in long track (A point) place of commutation shallow slot, slips is softened and bites casing wall, applying center-pole 1 in 10～35kN downforce (tubing string well head suspending weight alleviates) make packer and compress downwards interior packing element 2, interior center-pole 1 pushes central tube 3 to be continued to move downward the outer packing element 4 of compression, insulates oil sets annular space.
Deblocking process:
Upper lifting pipe post, in driving packer, center-pole 1 is up, interior packing element 2 first unseals, now, highly pressurised liquid is entered in central tube 3 by the gap between interior packing element 2 and central tube 3, and enters into packer bottom by the sand washing passage on guiding centre pipe 12 tube wall, packer two-way pressure is made to balance, when the pressure cap 14 being connected on interior center-pole 1 touches central tube 3 lower end, pressure cap 14 heads on central tube 3 and moves upward, and outer packing element 4 unseals.Continuing upper lifting pipe post, central tube 3 continues up, and cone 6 disengages with slips 15, and slips 15 bounces back.
Sand washing process:
If packer top has sand setting to cause the difficulty that pulls out of hole, so first reacting cycle, the sand backwash on fluid course top is gone out pit shaft, afterwards for sand setting a small amount of above outer packing element 4, can be under conditions of closing oil pipe gate, from annular space infusion fluid, fluid enters in central tube 3 from the gap between interior packing element 2 and central tube 3, and enter into packer bottom by the sand washing passage on guiding centre pipe 12 tube wall, and then sand setting is carried to below packer.
In sum, the present invention is compared with conventional packer, and the present invention passes through upper lifting pipe post when deblocking, interior packing element solution is made to be honored as a queen, fluid can be entered into below packer by the annular space of interior center-pole Yu central tube, so that packer two-way pressure balance, is beneficial to deblocking；Additionally when running into sand card situation, can be under conditions of closing oil jacket annular space, sand cleaning fluid is injected from oil pipe, sand cleaning fluid can enter into the annular space of itself and interior center-pole by the inlet opening from central tube, again from the sand washing passage of central tube out, thus the sand setting on packer is flushed to below packer, release packer sand card.
Exemplified as above is only the illustration to the present invention, is not intended that the restriction to protection scope of the present invention, within the every and same or analogous design of the present invention belongs to protection scope of the present invention.
Claims (7)
1. a compression underseal packer, it is characterised in that: include commutation righting mechanism, anchor mechanism and the sealing mechanism being sequentially connected with from bottom to top；nullDescribed commutation righting mechanism is by lower contact (13)、Guiding centre pipe (12)、Guide finger (17)、Guide finger carrier (11)、Wiper block (16)、Wiper block carrier (10) and spring (9) composition，Described lower contact (13) upper end is connected with guiding centre pipe (12) lower end，Described guiding centre pipe (12) lower end outer wall is provided with " W " type commutation shallow slot，Described guide finger carrier (11) lower end is provided with an internal thread hole，Described internal thread hole is corresponding with " W " type of guiding centre pipe (12) commutation shallow slot position，Described guide finger (17) is fixed in the internal thread hole of guide finger carrier (11)，Described guide finger carrier (11) upper end is connected with wiper block carrier (10) lower end，Described wiper block carrier (10) outer wall is uniformly distributed four wiper block grooves vertically，Described four wiper block grooves are respectively provided with a wiper block (16)，It is provided with spring (9) in the middle of described wiper block (16) and wiper block groove；
Described anchor mechanism is made up of slips box (8), slips (15), slips spring (7) and cone (6), described slips box (8) lower end is connected with wiper block carrier (10) upper end, described slips box (8) upper end inwall is uniformly distributed four arc-shaped slots vertically, a slips (15) respectively it is fixed with in described four arc-shaped slots, described slips (15) upper end fits with cone (6) lower end, and described slips spring (7) is arranged on slips (15)；
Described sealing mechanism is by lower side ring (5), outer packing element (4), central tube (3), interior packing element (2), interior center-pole (1), pressure cap (14) forms, described lower side ring (5) lower end is connected with cone (6) upper end, described outer packing element (4) is enclosed within central tube (3) lower end outer wall, described outer packing element (4) lower end fits with lower side ring (5) upper end, described central tube (3) lower end is connected with guiding centre pipe (12) upper end, described interior center-pole (1) is placed in central tube (3), its lower end connects pressure cap (14), described interior packing element (2) is placed between interior center-pole (1) and central tube (3)；
Described interior center-pole (1) is cylindrical, and is from top to bottom divided into upper, middle and lower segment, and its external diameter diminishes successively, by taper seat gentle transition between stage casing and hypomere；
Described interior center-pole (1) epimere has centre bore (19) in the most through two-stage, having a steel ball (18) at interior centre bore (19) reducing, interior center-pole (1) epimere outer wall is uniformly distributed 4 liquid flow holes connected with interior centre bore (20)；
Described central tube (3) is cylinder, and its external diameter is up big and down small, and internal orifice dimension is up big and down small, and endoporus is by taper seat gentle transition.
2. compression underseal packer as claimed in claim 1, it is characterised in that: the taper seat of described interior center-pole (1) is identical with the gradient of the taper seat of central tube (3) endoporus.
3. the compression underseal packer as described in claim 1, it is characterised in that: described lower side ring (5) is cylindrical shape, and its upper-end inner diameter is little, and bottom diameter is big and has internal thread to be connected with cone (6).
4. the compression underseal packer as described in claim 1, it is characterized in that: the groove width of the arc-shaped slot of described slips box (8) is consistent with slips (15) width, and arc-shaped slot lower end connects with slips box (8) outer wall.
5. the compression underseal packer as described in claim 1, it is characterised in that: described guiding centre pipe (12) outer wall is distributed multiple equal diameter through hole.
6. the compression underseal packer as described in claim 1, it is characterized in that: described lower contact (13) hypomere is for carrying externally threaded little cylinder, stage casing is cone, epimere is tapped great circle cylinder, and large cylinder is external is evenly equipped with 6 " u "-shaped guiding gutters (21) vertically.
7. the compression underseal packer as described in claim 1, it is characterized in that: described cone (6) upper end is cylindrical shape, lower end is cone, described slips (15) upper end is the conical surface, and the conical surface of cone (6) is identical with the conical surface gradient of slips (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410633636.XA CN104314511B (en) | 2014-11-12 | 2014-11-12 | A kind of compression underseal packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410633636.XA CN104314511B (en) | 2014-11-12 | 2014-11-12 | A kind of compression underseal packer |
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| Publication Number | Publication Date |
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| CN104314511A CN104314511A (en) | 2015-01-28 |
| CN104314511B true CN104314511B (en) | 2016-08-24 |
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| CN201410633636.XA Active CN104314511B (en) | 2014-11-12 | 2014-11-12 | A kind of compression underseal packer |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929562B (en) * | 2015-06-24 | 2017-12-22 | 安东石油技术（集团）有限公司 | Packer |
| CN106703740B (en) * | 2015-08-11 | 2019-04-16 | 中国石油化工股份有限公司 | Bi-directional compression packer inside and outside hydraulically-controlled type |
| CN115142811B (en) * | 2022-06-23 | 2024-04-12 | 中国石油天然气集团有限公司 | Non-rotary repeatable setting packer and setting and unsetting methods thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1465845A (en) * | 2002-07-06 | 2004-01-07 | 李原记 | Novel packer |
| CN103867159A (en) * | 2012-12-13 | 2014-06-18 | 中国石油化工股份有限公司 | Integrated mechanical clamp seal type packer of pump seal and method for preventing tubular column from being bent |
| CN104074487A (en) * | 2014-07-11 | 2014-10-01 | 中国石油大学(北京) | Packer |
| CN204113207U (en) * | 2014-11-12 | 2015-01-21 | 中国石油天然气股份有限公司 | A kind of compression underseal packer |
-
2014
- 2014-11-12 CN CN201410633636.XA patent/CN104314511B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1465845A (en) * | 2002-07-06 | 2004-01-07 | 李原记 | Novel packer |
| CN103867159A (en) * | 2012-12-13 | 2014-06-18 | 中国石油化工股份有限公司 | Integrated mechanical clamp seal type packer of pump seal and method for preventing tubular column from being bent |
| CN104074487A (en) * | 2014-07-11 | 2014-10-01 | 中国石油大学(北京) | Packer |
| CN204113207U (en) * | 2014-11-12 | 2015-01-21 | 中国石油天然气股份有限公司 | A kind of compression underseal packer |
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| CN104314511A (en) | 2015-01-28 |
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