CN204327039U - Setting deblocking pressure break packer can be repeatedly repeated at horizontal well - Google Patents

Setting deblocking pressure break packer can be repeatedly repeated at horizontal well Download PDF

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Publication number
CN204327039U
CN204327039U CN201420762088.6U CN201420762088U CN204327039U CN 204327039 U CN204327039 U CN 204327039U CN 201420762088 U CN201420762088 U CN 201420762088U CN 204327039 U CN204327039 U CN 204327039U
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packing element
center tube
upper center
packer
central tube
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CN201420762088.6U
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Chinese (zh)
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鲁延瑞
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Jinhu County Fulcrum Petroleum Science And Technology Co Ltd
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Jinhu County Fulcrum Petroleum Science And Technology Co Ltd
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Abstract

The utility model discloses one can repeatedly repeat setting deblocking pressure break packer at horizontal well, it comprises: top connection, upper center tube, single current valve seat, be threaded with upper center tube and compress the single current valve bonnet of single current valve seat, be enclosed within the upper back of the body cap outside upper center tube, anti-compacted spring, the spring housing that upper end is connected with upper back of the body cap thread, be arranged on upper center tube lower outside and by the spacing wear-resistant black box of spline, the packing element central tube be connected with spring housing lower end, cover hangs over the cone cover and cone that the outer and screw thread of packing element central tube is connected, be enclosed within outer and at least two the interconnective packing elements of packing element central tube, and the lower center tube to be threaded with packing element central tube.The utility model can in horizontal well volume fracturing process pipe string, meet large volume, high discharge capacity, the sleeve pipe infusion of Gao Hansha ratio, reacting cycle and open flow operation, the setting mechanism of particular design there is sand prevention function and repeatedly can set at net horizontal section, deblocking, meet the requirement of multiple fracturing.

Description

Setting deblocking pressure break packer can be repeatedly repeated at horizontal well
Technical field
The utility model discloses one can repeatedly repeat setting deblocking pressure break packer at horizontal well.
Background technology
Along with deepening continuously of oilfield exploitation, the continuous lifting of stimulation technology, the continuous exhaustion of stratum energy, horizontal well and high angle hole volume fracturing workload increasing.Volume fracturing is different from common formation fracturing, and its maximum feature is that fracturing fluid consumption is large, discharge capacity is high, many containing Sha Bi great, processing layer, injects discharge capacity much at 6m 3/ more than min, because oil pipe overflow section is long-pending relatively little, blank tubing injects and has been difficult to the infusion requirement meeting volume fracturing, and it is imperative that sleeve pipe injection or oil jacket inject simultaneously.The common fault that the packer that uses in horizontal well exists sets difficulty at net horizontal section exactly, and the conventional packer of the mechanical anchor formula mechanism that switches tracks is directly exposed to high containing in the fluid of solid phase, the flexibility that switches tracks reduction.
Utility model content
The technology blind area that the packer used in view of existing level well volume fracturing exists, the utility model object is exactly propose one can repeatedly repeat setting deblocking pressure break packer at horizontal well to overcome above-mentioned technological deficiency.
For achieving the above object, the utility model adopts following technical scheme: one can repeatedly repeat setting deblocking pressure break packer at horizontal well, and it comprises: the top connection of built-in oil pipe internal thread, the upper center tube that upper end is connected with top connection screw thread, be positioned at the single current valve seat of upper center tube inner chamber, be threaded with upper center tube and compress the single current valve bonnet of single current valve seat, be enclosed within the upper back of the body cap outside upper center tube, one end is connected with upper center tube and the anti-compacted spring be pre-compressed, the spring housing that upper end is connected with upper back of the body cap thread, be arranged on upper center tube lower outside and by the spacing wear-resistant black box of spline, be connected with spring housing lower end and the packing element central tube adjacent with the anti-compacted spring other end, cover hangs over the cone cover and cone that the outer and screw thread of packing element central tube is connected, be enclosed within outer and at least two packing elements be connected of packing element central tube, the lower center tube be threaded with packing element central tube, to be positioned at below cone and the cell body be positioned at outside packing element central tube, be installed on several slips on cell body and circumferential uniform, clip in the middle part of restriction slips, slips is inner by the support spring compressed, slips bottom by radial direction spacing and through be threadedly connected to cell body lower outer and cap, the track sheath be connected with cell body thread in inner cavity, getting on the right track of being connected with track sheath lumen threaded upper ends is managed, the lower railway pipe be threaded with track sheath lumen lower end, be arranged on gap and rotatable pin ring that lower center tube is connected with packing element central tube, and be connected to the guide head of lower center tube lower end, wherein anti-compacted spring is positioned at the annular space of upper center tube and spring housing, and wear-resistant black box comprises the stacking balanced seal circle of multiple axis, and be balanced the axial bracing ring surrounded of sealing ring, described upper center tube, upper back of the body cap, spring housing, anti-compacted spring, wear-resistant black box, spline composition hydraulic resistance balance unit, the described pipe that gets on the right track, lower railway pipe, pin ring form the unit that switches tracks, and described cell body is provided with sand discharge hole.
On the basis of technique scheme, comprise following attached technical scheme further:
Have steel ball in described single current valve bonnet, upper back of the body cap is hung by the step of upper center tube, and wherein the cross sectional shape of balanced seal circle is in " shape, and the cross sectional shape of bracing ring is hexagon.
It comprises cell body further, be installed on several slips on cell body and circumferential uniform, clip in the middle part of restriction slips, slips is inner by the external bracing spring supported, slips bottom by radial direction spacing and through be threadedly connected to cell body lower outer and cap, the track sheath be connected with cell body thread in inner cavity, getting on the right track of being connected with track sheath lumen threaded upper ends is managed, the lower railway pipe be threaded with track sheath lumen lower end, be arranged on gap and rotatable pin ring that lower center tube is connected with packing element central tube, and be connected to the guide head of lower center tube lower end.
Described upper center tube, upper back of the body cap, spring housing, anti-compacted spring, wear-resistant black box, spline composition hydraulic resistance balance unit, at unset state or make a trip in process, the pre-compression force of anti-compacted spring is greater than the frictional force of packer and sleeve pipe; And spring housing, upper center tube are all processed with multiple by-pass prot, form anti-flushing well passage with single current valve seat, sand discharge hole is positioned at the outside of track sheath.
The described pipe that gets on the right track, lower railway pipe, pin ring form the unit that switches tracks, the pipe that gets on the right track defines hollow " J " shape track with the hollow space on lower railway pipe, to be sleeved on packing element central tube and bossing on rotatable pin ring is freely retreated in this " J " shape track, and to change the duty of packer; Upper center tube, get on the right track pipe and lower railway Guan Shangjun are provided with the sand prevention back-up ring of slight interference.
Hemispherical is made in described guide head lower end, and longitudinal direction machined multiple circumference uniform chute and multiple by-pass prot excessively, chute of crossing on wherein multiple by-pass prots of guide head, lower center tube inner chamber, packing element central tube inner chamber, spline is communicated with and forms fluid path passage, when packer is in unset state, the high liquid containing solid phase can be passed through this passage upwards row of returning.
It is outer and comprise upper and lower part packing element that described packing element is sleeved on packing element central tube, and bottom packing element hardness is higher, suppressed range is less, auxiliary seal is played after compression, and top packing element hardness is slightly low, suppressed range is comparatively large, plays main seal, and be auxiliary seal after the compression of bottom packing element, and be main seal after the compression of top packing element.
The utility model, compared with prior art has following advantage:
1, oil field volume fracturing is met from the injection of sleeve pipe huge discharge, well-flushing, process requirements from oil pipe huge discharge open flow;
2, the system of switching tracks of relative closure makes packer also normally can switch tracks and set in the fluid of height containing solid phase, is applicable to fracturing work;
3, the anti-creep design of hydraulic resistance balance unit makes hydraulic resistance balance system be in opening all the time in a lower tubular column process, extends hydraulic resistance balance system lifetim;
4, special packing element modular design, the unidirectional pressure reduction that packer is born (upper pressure reduction) is higher.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further described:
Fig. 1 is partial sectional view of the present utility model;
Fig. 2 is the sectional view of the utility model when to be applied in oil pipe and to be in the first state;
Fig. 3 is the sectional view of the utility model when to be applied in oil pipe and to be in the second state.
Detailed description of the invention
As Figure 1-3, the utility model provides one can repeatedly repeat setting deblocking pressure break packer at horizontal well, and it comprises: the top connection 1 of built-in oil pipe internal thread, the upper center tube 4 that upper end is connected with top connection 1 screw thread, be positioned at the single current valve seat 3 of upper center tube 4 inner chamber, be threaded with upper center tube 4 and compress single current valve seat 3 to form the single current valve bonnet 2 of ball-and-seat, be enclosed within the upper back of the body cap 5 outside upper center tube 4, one end is connected with upper center tube 4 and the anti-compacted spring 7 be pre-compressed, the spring housing 6 that upper end is threaded with upper back of the body cap 5, be arranged on upper center tube 4 lower outside and by the spacing wear-resistant black box 8 of spline 9, the packing element central tube 10 be connected with spring housing 6 lower end, cover hangs over the cone cover 12 and cone 13 that the outer and screw thread of packing element central tube 10 is connected, be enclosed within outer and at least two the interconnective packing elements 11 of packing element central tube 10, the lower center tube 28 be threaded with packing element central tube 10, to be positioned at below cone 13 and the cell body 19 be positioned at outside packing element central tube 10, be installed on several slips 15 on cell body 19 and circumferential uniform, clip 16 in the middle part of restriction slips 15, slips 15 inside by the external bracing spring 17 supported, slips 15 bottom by radial direction spacing and through be threadedly connected to cell body 19 lower outer and cap 24, the track sheath 25 be connected with cell body 19 thread in inner cavity, the pipe 14 that gets on the right track be connected with track sheath 25 inner chamber threaded upper ends, the lower railway pipe 26 be threaded with track sheath 25 inner chamber lower end, be arranged on gap and rotatable pin ring 27 that lower center tube 28 is connected with packing element central tube 10, and be connected to the guide head 29 of lower center tube 28 lower end.Wherein have steel ball in single current valve bonnet 2, upper back of the body cap 5 is hung by the step of upper center tube 4, and anti-compacted spring 7 is positioned at the annular space of upper center tube 4 and spring housing 6.The upper bore passages 40 be connected with ball-and-seat is had in upper center tube 4.Wear-resistant black box 8 can adopt one or more groups sealing ring, all in scope of patent protection of the present utility model.Wear-resistant black box 8 preferably includes the stacking balanced seal circle of multiple axis and is balanced the axial bracing ring surrounded of sealing ring.Pin ring 27 is single unitary components and is formed by linear cutter, and bossing is cylindric.
Upper center tube 4, upper back of the body cap 5, spring housing 6, anti-compacted spring 7, wear-resistant black box 8, spline 9 form hydraulic resistance balance unit, and at unset state or make a trip in process, the pre-compression force of anti-compacted spring 7 is greater than the frictional force of packer and sleeve pipe; And upper center tube 4 is all processed with the multiple upper by-pass prot 42 be connected with upper bore passages 40, spring housing 6 is processed with the multiple spring housing by-pass prots 60 be connected with upper by-pass prot 42, and these by-pass prots and single current valve seat 3 form anti-flushing well passage, huge discharge when its enough large area of passage meets volume fracturing (is greater than 10m 3/ min) requirement of anti-flushing well.
Get on the right track pipe 14, lower railway pipe 26, pin ring 27 composition switches tracks unit, the pipe 14 that gets on the right track defines hollow " J " shape track with the hollow space on lower railway pipe 26, to be sleeved on packing element central tube 10 and bossing on rotatable pin ring 27 is freely retreated in this " J " shape track, and change the duty of packer, namely set or deblocking; Due in the middle of get on the right track pipe 14 and lower railway pipe 26 through track sheath 25 screw thread bridge joint, and all screw threads have all done anti-rotation process, hollow " J " shape track that pipe 14 and lower railway pipe 26 surround so get on the right track can not deform, with normally carrying out of ensureing that packer switches tracks; Upper center tube 4, get on the right track pipe 14 and lower railway pipe 26 are all provided with the sand prevention back-up ring 30 of slight interference; especially upper center tube 4 and on carry on the back between cap 5, between upper center tube 4 and spring housing 6, between upper center tube 4 and cone 13, packing element central tube 10 and get on the right track between pipe 14, between packing element central tube 10 and lower railway pipe 26 and be provided with sand prevention back-up ring 30; thus solid phase particles cannot enter the system inner chamber that switches tracks, and packer also can normally be switched tracks under the adverse circumstances of height containing solid phase particles.
Hemispherical is made in guide head 29 lower end, and longitudinal direction machined multiple circumference uniform chute and multiple guide head by-pass prot 290 excessively, spline on the lower inner cavity passage 280 of wherein multiple by-pass prots 290 of guide head 29, lower center tube 28, the packing element bore passages 100 of packing element central tube 10, spline 9 is crossed chute 90 and is communicated with and forms fluid path passage, when packer is in unset state, the high liquid containing solid phase can be passed through this fluid path passage upwards row of returning, to alleviate the high solid phase liquid that contains to the erosive wear of packer outside appurtenances.
It is outer and comprise upper and lower part packing element that packing element 11 is sleeved on packing element central tube 10, upper and lower part packing element directly contacts mutually, spacer ring does not exist, its hardness difference to some extent, the present embodiment middle and lower part packing element hardness is higher, and suppressed range is less, auxiliary seal is played after compression, and top packing element hardness is slightly low, suppressed range is comparatively large, plays main seal.Under the brute force of bottom packing element supports, even if bear very large portion pressure, top packing element also can not turn up, and thus whole packer can bear very high upper pressure reduction.
As shown in Figure 2, the utility model is connected to bottom oil pipe string, under enter sleeve pipe, in sleeve pipe, slips 15 is close to sleeve pipe under contained spring 17 supports, and can produce enough frictional force for packer setting.During lower tubular column, the bossing on pin ring 27 is positioned at the short track of hollow " J " shape track that get on the right track pipe 14 and lower railway pipe 26 surround, and slips 15 and cone 13 remain certain distance, and instrument can not set, and instrument is in unset state.Due to precommpression when anti-compacted spring 7 is installed, its elastic force is enough to the frictional force overcoming packer and sleeve pipe, upper center tube 4 can not insert the lower lumen of spring housing 6 all the time, and the cross chute of lower lumen through spline 9 place of packer is communicated with oil jacket annular space with the oil pipe on top all the time.
As shown in Figure 3, when arriving design attitude under pipe string, upper lifting pipe string certain distance, transfer pipe string again, slips 15 is because of friction sleeve pipe, and the short rail of " J " shape track that the projection on pin ring 27 is made up of get on the right track pipe 14 and lower railway pipe 26 slides into long track, and cone 13 extrudes slips 15 and is engaged sleeve pipe and formed and support, top connection 1 presses down the back of the body cap 5, spring housing 6, packing element central tube 10 successively, final compression packing element 11 Expansion sealing casing annulus; Meanwhile, the wear-resistant black box 8 of upper center tube 4 lower end and spline 9 insert the inner chamber of spring housing 6 bottom, and rely on the interference fit of wear-resistant black box 8 and spring housing 6 lower lumen to form sealing, the pent hydraulic resistance balance system in the upper and lower space of packer separately; When injecting fracturing fluid or reacting cycle well-flushing from sleeve pipe huge discharge, the top high pressure acted on packing element 11 contributes to the sealing of packer.
Again shown in composition graphs 2, when upper lifting pipe string deblocking, the inner chamber of spring housing 6 bottom extracted out by the wear-resistant black box 8 of upper center tube 4 lower end and spline 9, the longitudinal flow channels of the upper and lower space of packer through spline 9 place is communicated with, the pressure in the upper and lower space of packer is balanced rapidly, and packer is carried on continuing and is easy to deblocking.
Additional information: described pipe string refers to all oil pipes of G.I.H and the summation of instrument; The boundary in the upper and lower space of packer is the seal section of wear-resistant black box 8 and spring housing 6 lower lumen; About this packer other parts or principle, belong to the known technology of traditional packer, do not repeat them here.It should be noted that those skilled in the art can carry out expanding or equivalent transformation according to structure of the present utility model or feature, but all belong to protection domain of the present utility model.
Certain above-described embodiment, only for technical conceive of the present utility model and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit protection domain of the present utility model with this.All equivalent transformations of doing according to the Spirit Essence of the utility model main technical schemes or modification, all should be encompassed within protection domain of the present utility model.Basic structure, the principle of Y211 type packer belong to known technology, not in the protection domain of this patent, do not repeat them here.

Claims (6)

1. one kind can repeatedly be repeated setting deblocking pressure break packer at horizontal well, it is characterized in that it comprises: the top connection (1) of built-in oil pipe internal thread, the upper center tube (4) that upper end is connected with top connection (1) screw thread, be positioned at the single current valve seat (3) of upper center tube (4) inner chamber, be threaded with upper center tube (4) and compress the single current valve bonnet (2) of single current valve seat (3), be enclosed within upper center tube (4) upper back of the body cap (5) outward, one end is connected with the upper end of upper center tube (4) and the anti-compacted spring (7) be pre-compressed, the spring housing (6) that upper end is threaded with upper back of the body cap (5), be arranged on upper center tube (4) lower outside and by the spacing wear-resistant black box (8) of spline (9), be connected with spring housing (6) lower end and the packing element central tube (10) adjacent with anti-compacted spring (7) other end, cover hangs over packing element central tube (10) and screw thread the cone cover (12) and the cone (13) that are connected outward, be enclosed within packing element central tube (10) and at least two interconnective packing elements (11) outward, the lower center tube (28) be threaded with packing element central tube (10), be positioned at cone (13) below and the cell body (19) be positioned at outside packing element central tube (10), be installed on several slips (15) that cell body (19) is upper and circumferential uniform, the clip (16) at restriction slips (15) middle part, slips (15) is inner by the support spring (17) compressed, slips (15) bottom by radial direction spacing and through be threadedly connected to cell body (19) lower outer and cap (24), the track sheath (25) be connected with cell body (19) thread in inner cavity, getting on the right track of being connected with track sheath (25) inner chamber threaded upper ends is managed (14), the lower railway pipe (26) be threaded with track sheath (25) inner chamber lower end, be arranged on gap and rotatable pin ring (27) that lower center tube (28) is connected with packing element central tube (10), and be connected to the guide head (29) of lower center tube (28) lower end, wherein anti-compacted spring (7) is positioned at the annular space of upper center tube (4) and spring housing (6), wear-resistant black box (8) comprises the stacking balanced seal circle of multiple axis, and be balanced the axial bracing ring surrounded of sealing ring, described upper center tube (4), upper back of the body cap (5), spring housing (6), anti-compacted spring (7), wear-resistant black box (8), spline (9) composition hydraulic resistance balance unit, the described pipe (14) that gets on the right track, lower railway pipe (26), pin ring (27) form the unit that switches tracks, and described cell body (19) is provided with sand discharge hole (32).
2. one according to claim 1 can repeatedly repeat setting deblocking pressure break packer at horizontal well, it is characterized in that: in described single current valve bonnet (2), have steel ball, upper back of the body cap (5) is hung by the step of upper center tube (4), wherein the cross sectional shape of balanced seal circle is in " shape, and the cross sectional shape of bracing ring is hexagon.
3. one according to claim 2 can repeatedly repeat setting deblocking pressure break packer at horizontal well, it is characterized in that: described hydraulic resistance balance unit is at unset state or make a trip in process, the pre-compression force of anti-compacted spring (7) is greater than the frictional force of packer and sleeve pipe; And spring housing (6), upper center tube (4) are all processed with multiple by-pass prot, form anti-flushing well passage with single current valve seat (3), sand discharge hole (32) are positioned at the outside of track sheath (25).
4. one according to claim 3 can repeatedly repeat setting deblocking pressure break packer at horizontal well, it is characterized in that: described in the hollow space got on the right track on pipe (14) and lower railway pipe (26) define hollow " J " shape track, be sleeved on the upper and bossing on rotatable pin ring (27) of packing element central tube (10) freely to retreat in this " J " shape track, and change the duty of packer; Upper center tube (4), get on the right track pipe (14) and lower railway pipe (26) are all provided with the sand prevention back-up ring (30) of slight interference.
5. one according to claim 4 can repeatedly repeat setting deblocking pressure break packer at horizontal well, it is characterized in that: hemispherical is made in described guide head (29) lower end, and longitudinal direction machined multiple circumference uniform chute and multiple by-pass prot excessively, chute of crossing on wherein multiple by-pass prots of guide head (29), lower center tube (28) inner chamber, packing element central tube (10) inner chamber, spline (9) is communicated with and forms fluid path passage, when packer is in unset state, the high liquid containing solid phase can be passed through this passage upwards row of returning.
6. one according to claim 5 can repeatedly repeat setting deblocking pressure break packer at horizontal well, it is characterized in that: described packing element (11) is sleeved on packing element central tube (10) and comprise upper and lower part packing element outward, and be auxiliary seal after the compression of bottom packing element, and be main seal after the compression of top packing element.
CN201420762088.6U 2014-12-07 2014-12-07 Setting deblocking pressure break packer can be repeatedly repeated at horizontal well Active CN204327039U (en)

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Application Number Priority Date Filing Date Title
CN201420762088.6U CN204327039U (en) 2014-12-07 2014-12-07 Setting deblocking pressure break packer can be repeatedly repeated at horizontal well

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420762088.6U CN204327039U (en) 2014-12-07 2014-12-07 Setting deblocking pressure break packer can be repeatedly repeated at horizontal well

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104929562A (en) * 2015-06-24 2015-09-23 安东石油技术(集团)有限公司 Packer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104929562A (en) * 2015-06-24 2015-09-23 安东石油技术(集团)有限公司 Packer
CN104929562B (en) * 2015-06-24 2017-12-22 安东石油技术(集团)有限公司 Packer

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