CN101165310A - One-way slip hydraulic base sealed packer - Google Patents
One-way slip hydraulic base sealed packer Download PDFInfo
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- CN101165310A CN101165310A CNA2006101371004A CN200610137100A CN101165310A CN 101165310 A CN101165310 A CN 101165310A CN A2006101371004 A CNA2006101371004 A CN A2006101371004A CN 200610137100 A CN200610137100 A CN 200610137100A CN 101165310 A CN101165310 A CN 101165310A
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Abstract
The present invention is one packer with hydraulically sealed oneway slips seat. The slips seat has one lower sleeve with installation hole for locking blocks, and one locking sleeve to push locking blocks into the locking holes of the conic connecting sleeve for the rigid locking between the slips seat and the conic connecting sleeve. The locking sleeve is provided with one unlocking slot, and may be unlocked when the push tube pushes the locking sleeve upwards for the unlocking slot to correspond to the locking block installation hole. The packer has flexibly set shearing force of the shearing nail in slips seat to ensure no creep of the pipe column in various well job, has job success rate and accuracy rate, and capacity of completing flushing job.
Description
Technical field
The present invention relates to the packing device of each oil reservoir of packing oil gas well in a kind of exploration of oil and gas field, the development process or casing tube, especially can in oil well, stop the operating tool string wriggling, implement the one-way slip hydraulic base sealed packer of unidirectional grappling.
Background technology
At present, known one-way slip hydraulic base sealed packer the seat sealing mechanism as shown in Figure 8, slips mechanism comprises one-way slip 13, slip spider 14, slips spring 15, spring base 17, upper cone 12.When packer is hydraulic base sealed, piston 22 is up, it is up to promote spring base 17, the pushing cylinder that fuses with spring base 17 23 is up cuts off the shear pin 40 that slip spider 14 is connected with piston bush 19, slips spring 15 opens, slip spider 14 moves under the effect of slips spring 15, and makes slips 13 open grappling, and seat is sealed up piston 22 and promoted cone adapter sleeve 27 and upper cone 12 up enforcements seat envelopes jointly with a seat envelope lower piston then.The major defect of its existence: when packer is gone into the well, because the friction and the collision of packer and sleeve pipe, cut off slip spider shear pin 40 midway easily and make slips open grappling and cause the hair fastener phenomenon, if eliminate the problems referred to above, then can produce bigger piston effect because of required seat seal pressure is bigger by the shearing that increases shear pin, cause the operating tool string elongation, tubing string shrank when present seal pressure was removed, and caused packer to move, and very easily destroyed packing element; In addition, packer is separated and is honored as a queen, and slips still is in and opens the grappling state, runs into the also easy hair fastener in irregular places such as pipe box box cupling, casing wall burr.
Summary of the invention
For solve above-mentioned one-way slip hydraulic base sealed packer seat be honored as a queen the tubing string wriggling easily takes place, the easy deficiency of hair fastener in the way of going into the well, the invention provides a kind of one-way slip hydraulic base sealed packer, the slip spider of this one-way slip hydraulic base sealed packer and cone adapter sleeve rigidity locking, slips opens grappling packer and the friction of sleeve pipe, influence of collision when whether not gone into the well, and is difficult for hair fastener in the way of going into the well; It is less that slips opens the required pressure of grappling, thereby can guarantee that demonstrate,proving operating tool string does not wriggle.
The present invention solves like this: it comprises top connection, lower contact, central tube, packing element sealing mechanism, slips mechanism and seat sealing mechanism, and the seat sealing mechanism comprises seat envelope piston, piston bush and cone adapter sleeve; Slips mechanism comprises one-way slip, slip spider, slips spring, spring base and upper cone; There is the sleeve that cooperates with the cone adapter sleeve slip spider lower end, and the slips spring housing is contained in the sleeve outside, and the sleeve of slip spider lower end is provided with the latch installing hole, and corresponding site is provided with and cooperates locking hole or groove with latch on the cone adapter sleeve; Between slips spring and slip spider sleeve, also be provided with a slip spider lock tube that is sleeved on the slip spider sleeve, the latch that this slip spider lock tube will be contained in the slip spider sleeve is pressed into to the locking hole or groove of cone adapter sleeve, realizes slip spider and cone adapter sleeve rigidity locking; Described slip spider lock tube is provided with the locked groove of separating that cooperates with latch, when seat seals, move on the pushing cylinder promote the slip spider lock tube when the slip spider sleeve goes upward to slip spider step place the described position of locked groove of separating corresponding to the latch installing hole position on the sleeve.
Above-mentioned slip spider lock tube is connected with the slip spider sleeve by shear pin.Can be implemented on the slip spider sleeve and locate, its shear pin shearing can be provided with less.
When the seat envelope is initial, when seat is sealed up piston stroking upward and is promoted the slip spider lock tube and go upward to slip spider step place by pushing cylinder, slip spider opens grappling exercising slips on the release of cone adapter sleeve under the effect of slips spring, and seat is sealed up then, lower piston promotes jointly that the cone adapter sleeve is up finishes the action of seat envelope.The friction of packer and sleeve pipe when going into the well, the impact force that collision produces is passed on the slip spider, and the slip spider rigidity is locked on the cone adapter sleeve, can not cause release, the up required pressure of pushing cylinder is less, be that less pressure slips is an expansible, pressure hour, the piston effect that produces is also less, owing between seat tube sealing post and sleeve very big frictional force is arranged, himself can overcome less piston effect, therefore, can guarantee that operating tool string do not wriggle, thereby the construction of having avoided tubing string to move being brought is unsuccessful, the construction accuracy is not high, the problems such as pollution that the stratum is unnecessary; Slips opens grappling and the hair fastener phenomenon in also can avoiding going into the well on the way simultaneously.
During deblocking, slips is difficult to be shunk and the easy hair fastener problem of lift pipe string in order to remove, the present invention also is being provided with a following top cover that slips is shunk and pin during at deblocking between the metal baffle ring of packing element sealing mechanism and the upper cone, cover lower end, described top down is enclosed within the upper cone epimere and connects by lockable mechanism, described lockable mechanism comprises separates lock tube and lock pin, the tube wall of upper cone epimere is provided with the pin-and-hole that lock pin is installed, cover lower end, following top inner cylinder face has a cone step that cooperates with the lock pin outer end, the interior radius of circle of step lower end is greater than the interior radius of circle of step upper end, and separating lock tube, to be located at lock pin inner and be fixed on the upper cone inwall by shear pin; Central tube is provided with when moving up can promote the boss that release puts the radial projection of moving; The length of following top cover makes that its lower end can promote the slips radial contraction at least under the return effect of when deblocking packing element.During deblocking, move on the moving central tube of upper lifting pipe cornice, boss on the central tube is up, it is up to promote the release cover, promoting lock pin at the following top of the reaction force of packing element cover by cone step moves and release to the axle center, the screen resilience of packing element further will descend the top cover to push away along the upper cone external cylindrical surface is counter downwards, and following top is overlapped descending and pushed back the downward return of slips.
The present invention also comprises a spring base lockable mechanism, comprise locking steel ball, release pull bar, described pushing cylinder is located between spring base and the cone adapter sleeve and with spring base and is slidingly connected, and axially sealing up between piston and the slip spider lock tube at seat, the cone adapter sleeve is provided with the snap ring spacing to the pushing cylinder lower end; The pushing cylinder inboard has axial groove, the thick diameter of axial groove diapire less than the locking steel ball, have the lockhole that matches with the locking steel ball on the diapire of axial groove, be provided with lock groove with the spring base of described lockhole relevant position, release pull bar one end is arranged in the inboard axial groove of described pushing cylinder, the locking steel ball is limited in the lockhole of pushing cylinder and partly embeds in the lock groove of spring base, spring base is locked on the cone adapter sleeve; The upper end of described release pull bar is hinged with separating lock tube, has groove or hole that the release pull bar is passed through on slip spider and the upper cone.During deblocking, it is up to separate lock tube drive release pull bar, and release pull bar lower end breaks away from the locking steel ball position of pushing cylinder, under the effect of slips spring, the locking steel ball is embedded in the release pull bar axial groove, makes spring base and pushing cylinder separate, spring base is descending, and the pretightning force of slips spring can further discharge.
The boss of described central tube upper process be enclosed within on the central tube can radial contraction elastic opening ring, split ring is provided with the location snap ring that is connected with central tube in two ends up and down, the taper seat that the release set upper side has the compressing split ring to shrink, the position of split ring are located at before the packer set and seat is honored as a queen separates the middle part of lock tube two positions of living in.Present envelope open front ring is positioned at the release set upper side, and it is up that upper cone drives the release cover during seat envelope, and release set upper side taper seat extruding split ring makes its contraction, separates lock tube and continues to go upward to the split ring upper end; Seat is honored as a queen and is separated lock tube and be positioned at split ring upper end certain distance, and described distance is for dwindling as possible under the situation that guarantees flow channels, and deblocking can shorten the length of packer apart from shortening like this, is convenient to the tubing string construction, the generation of minimizing accident.
Between upper cone of the present invention and central tube, cone adapter sleeve and the central tube annular gap is arranged, this gap is the flushing fluid flow channels, offers liquid pass hole on spring base and the pushing cylinder, can implement clean-out service.
The invention has the advantages that: the impact force of the friction of packer and sleeve pipe or collision is applied on the slip spider when 1, going into the well, slip spider and cone adapter sleeve rigidity locking, easy hair fastener problem in the way of therefore can avoiding going into the well; Simultaneously, the shear pin that is provided with on the slip spider lock tube only is used for slip spider lock tube location, so the shear pin shearing can carry out freely setting according to the requirement of oil well situation and construction, can guarantee that working string does not produce wriggling in the every job execution of oil gas well, thereby can realize the success rate of every operation and accuracy rate 2 better, when lower tubular column or packer deblocking lift pipe string, one-way slip is in stable gathering lockup state all the time, thereby easy construction has reduced the accident generation; 3, be provided with the well-flushing flow channels, be convenient to clean-out service, because one-way slip is located at the top of packer lower end well-flushing passage, do not take the well-flushing flow channels simultaneously, pollutant stops up the possibility of slips and slips hair fastener when having avoided well-flushing simultaneously.4, the packer set of this kind structure is stable, and deblocking is reliable.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is along A-A line sectional drawing among Fig. 1.
Fig. 3 is along B-B line sectional drawing among Fig. 1.
Fig. 4 is an empty frame C portion enlarged diagram among Fig. 1.
Fig. 5 is an empty frame D portion enlarged diagram among Fig. 1.
Fig. 6 is the structural representation of the present envelope state of the present invention.
Fig. 7 is the structural representation of the present invention at the deblocking state.
Fig. 8 is existing packer construction schematic diagram.
Fig. 9 is another embodiment of the present invention structural representation.
Among the figure, 1, top connection, 2, shear pin, 3, the well-flushing piston bush, 4, packing element, 5, the metal baffle ring, 6, regulating sleeve, 7, the lock ring seat, 8, lock ring, 9, following top cover, 10, spacer pin, 11, lock pin, 12, upper cone, 13, slips, 14, slip spider, 15, the slips spring, 16, latch (locking steel ball), 17, spring base, 18, the locking steel ball, 19, piston bush, 20, seat envelope lower piston, 21, lower contact, 22, seat is sealed up piston, 23, pushing cylinder, 24, snap ring, 25, the release pull bar, 26, the slip spider lock tube, 27, the cone adapter sleeve, 28, central tube, 29, flow channels, 30, release pull bar upper end, 31, separate lock tube, 32, following snap ring, 33, shear pin, 34, split ring, 35, last snap ring, 36, valve seat, 37, the throttling spring, 38, shear pin, 39, outer core pipe, 40, shear pin, 41, sleeve pipe, 42, voussoir, 43, liquid pass hole, 44, the gathering sill upper wall, 45, the side Ji, 46, skewed slot, 47, lock groove, 48, lockhole, 49, sleeve, 50, separate locked groove, 51, cotter slot (liquid pass hole), 52, internal conical surface, 53, step, 54, pin, 55-56, liquid pass hole.
The specific embodiment
Extremely shown in Figure 7 as Fig. 1, the present invention includes top connection 1, lower contact 21, central tube 28, packing element sealing mechanism, slips mechanism and seat sealing mechanism, a seat sealing mechanism comprises that seat is sealed up piston 22, seat seals lower piston 20, piston bush 19, cone adapter sleeve 28.Slips mechanism comprises one-way slip 13, slip spider 14, slips spring 15, spring base 17, upper cone 12 and pushing cylinder 23.Well-flushing piston bush 3 is connected in the top connection 1 by shear pin 2.Spring base 17 lower ends are provided with cotter slot 51, and piston bush 19 is slidingly connected by pin 54 and cotter slot 51 and spring base 17, make can to slide relatively between piston bush and the spring base.
Lockable mechanism between following top cover 9 and the upper cone 12 comprises separates lock tube 31, split ring 34 and lock pin 11, upper cone 12 epimeres have the cylindrical shell that stretches into down in the top cover 9, barrel wall is provided with the pin-and-hole that lock pin 11 is installed, lock pin adopts the face of cylinder with the contact surface of separating lock tube, on the lower end inwall of following top cover 9 cone step 53 that cooperates with lock pin 11 is arranged, the lock pin outer end closely cooperates on the face of cylinder about in the of 53 with following top cover cone step.Separate that lock tube 31 is installed in the cylindrical shell by shear pin 33 and with lock pin 11 retainings in pin-and-hole.Split ring 34 is enclosed within on the central tube 28, its position is located at separates lock tube 31 upper ends, and after packer set, be positioned at and separate the lock tube lower end, and make to separate between lock tube and the split ring and keep certain distance, form the gap as the well-flushing passage, split ring about in the of 34 two ends be provided be connected with central tube 28 on, under locate snap ring 35,32, the contact portion of separating lock tube 31 upper ends and split ring 34 lower ends is respectively equipped with the internal conical surface 52 that cooperatively interacts, outer conical surface, the outer conical surface of internal conical surface 52 extruding split rings 34 lower ends by the upper end when separating the present envelope of lock tube 31 make split ring pressurized and radial contraction.During deblocking, central tube drives on the split ring 34 and moves, and it is up that split ring 34 promotes to separate the radially straight step in lock tube 31 lower ends, and cut off deblocking shear pin 33, implements release.Split ring 34 lower end internal conical surfaces are provided with the contact surface that cooperatively interacts with the upper end outer conical surface of locating snap ring 32 down, as shown in Figure 7, during deblocking, split ring 34 bears downward power, when promoting to separate the radially straight step in lock tube 31 lower ends when stressed, under the effect of the upper end outer conical surface of locating snap ring 32 down, split ring 34 external cylindrical surfaces with separate lock tube 31 lower end inner cylinder faces and combine closely, promote simultaneously to separate radially directly moving on the step of lock tube 31, implement release, release is reliable and stable.
The upper end 30 of release pull bar is hinged with separating lock tube 31, has groove or the hole that release pull bar 30,25 is passed through on slip spider 14 and the upper cone 12.
Seat is honored as a queen separates between lock tube 31 and the central tube 28, the gap of formation is the flushing fluid flow channels between upper cone 12 and the split ring 34, between cone adapter sleeve 27 and the central tube 28 annular gap is arranged, this gap is a flushing fluid flow channels 29, offer liquid pass hole 43 on the pushing cylinder 23, pinning groove on the spring base 17 is a liquid pass hole, provides well-flushing to cross the liquid passage.The present invention is provided with the well-flushing flow channels, is convenient to clean-out service, because one-way slip 13 is located at the top of packer lower end well-flushing passage, has increased the well-flushing flow channels simultaneously, and pollutant stops up the possibility of slips and slips hair fastener when having avoided well-flushing simultaneously.
Its operating principle is as follows: during the seat envelope, referring to Fig. 6, seat envelope piston stroking upward, seat is sealed up piston 22 and is promoted pushing cylinder 23, slips spring base 17 and slip spider lock tube 26 move up, withstand on slip spider 14 bottoms after cutting off the shear pin 40 that slip spider lock tube 26 is connected with slip spider, at this moment, separate locked groove corresponding to position, locking steel ball place on the slip spider lock tube 26, under the effect of slips spring 15, the locking steel ball is extruded to separating in the locked groove 50 of slip spider lock tube 26, slip spider 14 releases, the slips spring 15 of pretension promote to exercise on the slip spiders 14 slips 13 and open that to be anchored on the borehole wall be on the sleeve pipe 41; Simultaneously, seat seals up piston 22 and seat envelope lower piston 20 continues up, promote cone adapter sleeve 27, upper cone 12 and push up cover 9 down up, cut off the seat envelope shear pin 38 on the regulating sleeve 6, it is up to promote metal baffle ring 5 by regulating sleeve, make packing element 4 compression mounts envelope, the annular tooth (not showing among Fig. 1) of upper cone 12 upper ends is realized the seat envelope with the tooth snap-lock of lock ring 8 simultaneously. Part 36,37 is a well-flushing choke valve assembly among Fig. 1.
During deblocking, referring to Fig. 7, move on the moving central tube 28 of upper lifting pipe cornice, central tube drives on the split ring 34 and moves, split ring 34 promotes to separate the radially straight step in lock tube 31 lower ends and cuts off deblocking shear pin 33, separate in lock tube 31 continuation and move to spacer pin 10, separate lock tube 31 and break away from lock pin 11 positions, lock pin 11 loses support, the screen resilience of packing element makes down the top overlap the 9 anti-lock pins 11 that push away downwards, and lock pin 11 pushes up the cone step of cover 9 lower ends under breaking away from sliding to axis direction, and following top is overlapped 9 releases and moved down along upper cone, it is descending and shrink to promote slips 13 when continuing to move down, remove slips 13 grapplings, and the upper surface of slips 13 all enters down the inner cylinder face of cover 9 lower ends, top when coming downwards to terminal point, make slips 13 can't open grappling again, implement to stablize locking; Separating lock tube 31 also is with release pull bar 25 up up the time, release pull bar 25 lower ends break away from locking steel ball 18 positions of pushing cylinder 23, locking steel ball 18 breaks away from spring base 17 and is embedded in the release pull bar axial groove under the back-pressure of slips spring 15, make spring base 17 and pushing cylinder 23 separate and release, the pretightning force of slips spring 15 further discharges, and makes slips 13 and the slip spider 14 can be easily descending.
Piston bush is collided to drive on the spring base when moving and is moved in going into the well on the way, because the internal diameter of spring base is greater than the external diameter of pushing cylinder and slip spider lock tube, only power is delivered on the slip spider of locking when moving on the spring base by the slips spring, and pushing cylinder and slip spider lock tube are moved, therefore, easy hair fastener problem in can avoiding going into the well on the way.
Figure 9 shows that spring base of the present invention and pushing cylinder fuse forms the embodiment of a member.The lockable mechanism of slip spider among the figure, identical in lockable mechanism and the last example of top cover down, no longer description.Piston bush in this example is enclosed within the spring base outside, when moving on the piston bush when contacting with slip spider, separated by a distance between piston bush and the spring base, piston bush is collided to move and is acted on slip spider in the way of going into the well like this, does not make the slip spider release and can not drive to move on the spring base.Spring base and piston bush upper end are provided with the liquid pass hole 55,56 that is used for well-flushing.During the seat envelope, seat is sealed up piston and is directly promoted the up release of slip spider lock tube.
Claims (6)
1. one-way slip hydraulic base sealed packer, comprise top connection [1], lower contact [21], central tube [28], packing element sealing mechanism, slips mechanism and seat sealing mechanism, a seat sealing mechanism comprises that seat is sealed up, lower piston [20,22], piston bush [19], cone adapter sleeve [27]; Slips mechanism comprises one-way slip [13], slip spider [14], slips spring [15], spring base [17], upper cone [13]; It is characterized in that: there is the sleeve [49] that cooperates with cone adapter sleeve [27] slip spider [14] lower end, slips spring [15] is sleeved on sleeve [49] outside, the sleeve of slip spider lower end [49] is provided with latch [16] installing hole, and cone adapter sleeve [27] is gone up corresponding site and is provided with and cooperates locking hole or groove with latch; Between slips spring and slip spider sleeve, also be provided with a slip spider lock tube [26] that is sleeved on the slip spider sleeve, this slip spider lock tube will be contained in latch in the slip spider sleeve [16] and be pressed into to the locking hole or groove of cone adapter sleeve [27], realize slip spider and cone adapter sleeve rigidity locking; Described slip spider lock tube [26] be provided with cooperate with latch [16] separate locked groove [50], when seat seals, move on the pushing cylinder promote slip spider lock tube [26] when slip spider sleeve [49] goes upward to slip spider step place the described position of locked groove [50] of separating corresponding to the latch on the sleeve [16] installing hole position.
2. one-way slip hydraulic base sealed packer according to claim 1, it is characterized in that: also be provided with a following top cover [9] that can forced slip during at deblocking shrinks between the metal baffle ring [5] of packing element sealing mechanism and the upper cone [12], cover [9] lower end, described top down is enclosed within upper cone [12] and upward and by lockable mechanism connects, described lockable mechanism comprises separates lock tube [31] and lock pin [11], the tube wall of upper cone [12] epimere is provided with the pin-and-hole that lock pin [11] is installed, cover [9] lower end, following top inner cylinder face has a cone step [53] that cooperates with lock pin [11] outer end, the interior radius of circle of step [53] lower end is greater than the interior radius of circle of step upper end, and separating lock tube [31], to be located at lock pin [11] inner and be fixed on upper cone [12] inwall by shear pin [33]; Central tube [28] is provided with when moving up and can promotes the boss that release puts the radial projection of moving; The length of following top cover makes that its lower end can promote the slips radial contraction at least under the resilience of when deblocking packing element.
3. one-way slip hydraulic base sealed packer according to claim 2, it is characterized in that: also comprise a spring base lockable mechanism, comprise locking steel ball [18], release pull bar [25], described pushing cylinder [23] is located between spring base [17] and the cone adapter sleeve and with spring base and is slidingly connected, and axially be positioned at the seat seal up between piston [20] and the slip spider lock tube [26], cone adapter sleeve [27] is provided with the snap ring [24] spacing to pushing cylinder [23] lower end; The pushing cylinder inboard has axial groove, the bottom wall thickness of axial groove is less than the diameter of locking steel ball [18], have the lockhole that matches with the locking steel ball on the diapire of axial groove, be provided with lock groove [47] with the spring base [17] of described lockhole relevant position, release pull bar [25] one ends are arranged in the described axial groove, be limited in the locking steel ball in the lockhole of pushing cylinder [23] and partly embed in the lock groove [47] of spring base [17], spring base [17] is locked on the cone adapter sleeve [27]; The upper end of described release pull bar [30] is hinged with separating lock tube [31], has groove or the hole that the release pull bar is passed through on slip spider [14] and the upper cone [13].
4. according to claim 2 or 3 described one-way slip hydraulic base sealed packers, it is characterized in that: the boss of described central tube [28] upper process for be enclosed within on the central tube [28] can radial contraction split ring [34], split ring is provided with the upper and lower location snap ring [35,32] that is connected with central tube [28] in two ends up and down, separate the internal conical surface [52] that lock tube [31] upper end has the compressing split ring to shrink, the position of split ring [34] is located at before the packer set and seat is honored as a queen separates the middle part of lock tube two positions of living in.
5. according to claim 1 or 2 or 3 described one-way slip hydraulic base sealed packers, it is characterized in that: between cone adapter sleeve [27] and the central tube [28] annular gap is arranged, this gap is flushing fluid flow channels [29], offers liquid pass hole [43] and [51] respectively on pushing cylinder [26] and the spring base [17].
6. according to claim 1 or 2 or 3 described one-way slip hydraulic base sealed packers, it is characterized in that: slip spider lock tube [26] is connected with slip spider sleeve [49] by shear pin [40].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101371004A CN101165310B (en) | 2006-10-18 | 2006-10-18 | One-way slip hydraulic base sealed packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101371004A CN101165310B (en) | 2006-10-18 | 2006-10-18 | One-way slip hydraulic base sealed packer |
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| Publication Number | Publication Date |
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| CN101165310A true CN101165310A (en) | 2008-04-23 |
| CN101165310B CN101165310B (en) | 2011-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101371004A Expired - Fee Related CN101165310B (en) | 2006-10-18 | 2006-10-18 | One-way slip hydraulic base sealed packer |
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|---|---|
| CN101165310B (en) | 2011-08-03 |
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