CN204627523U - Open hole packer - Google Patents

Open hole packer Download PDF

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Publication number
CN204627523U
CN204627523U CN201520264873.3U CN201520264873U CN204627523U CN 204627523 U CN204627523 U CN 204627523U CN 201520264873 U CN201520264873 U CN 201520264873U CN 204627523 U CN204627523 U CN 204627523U
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CN
China
Prior art keywords
packing
piston
central tube
sliding sleeve
connection
Prior art date
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Withdrawn - After Issue
Application number
CN201520264873.3U
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Chinese (zh)
Inventor
韩福柱
田野
吕孝明
李鹏日
由春坤
刘世伟
任龙
刘畅
高小婷
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Petrochina Co Ltd
China Petroleum and Natural Gas Co Ltd
Original Assignee
China Petroleum and Natural Gas Co Ltd
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Application filed by China Petroleum and Natural Gas Co Ltd filed Critical China Petroleum and Natural Gas Co Ltd
Priority to CN201520264873.3U priority Critical patent/CN204627523U/en
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Publication of CN204627523U publication Critical patent/CN204627523U/en
Withdrawn - After Issue legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The application discloses a kind of open hole packer, comprising: central tube, and its one end is connected with top connection, and the other end is connected with lower contact; The wall of described central tube is provided with open-work; Packing element unit, it comprises the first packing element connecting described top connection and the second packing element connecting described lower contact; Fluid cylinder cover, it has fluid cylinder cover first end and fluid cylinder overlaps the second end; First piston, it can move to compress described first packing element to described top connection; Sliding sleeve, it has sliding sleeve first end and sliding sleeve second end; Locking member, it can make described sliding sleeve only can move to described top connection; The second piston be connected by setting pin with described sliding sleeve second end, it can move to compress described second packing element to described lower contact; Be provided with pressure space between described second piston and described first piston, described pressure space is connected by the inside of described open-work with described central tube.The open hole packer that the application provides can improve the problem easily occurring packing element seal failure in fracturing process.

Description

Open hole packer
Technical field
The application relates to the downhole tool field of Oil/gas Well wellbore operations, particularly relates to a kind of open hole packer.
Background technology
Along with deepening continuously of oil field development, the exploitation difficulty in oil field is also in continuous increase.Horizontal well bore hole staged fracturing completion technique is widely used as a kind of oilfield stimulation measure.Horizontal well bore hole staged fracturing completion technique is by completion tubular column and fracturing string being merged into together with one-trip string in lower going-into-well, and adopt the instrument G.I.Hs together such as open hole packer, sand blast sliding sleeve and setting ball seat, then open hole packer packing horizontal segment is used, realize carrying out staged isolation to transverse horizontal well section alternative, carry out staged fracturing according to packing hop count, and then realize the complete fracturing work of net horizontal section.
In carrying out horizontal well bore hole staged fracturing completion technique process, adopt open hole packer to carry out segmentation to net horizontal section, modification measures targetedly can be taked to each well section after forming some well sections, finally reach the effect of volume increase.Can find out, open hole packer is one of instrument important in whole horizontal well bore hole staged fracturing completion technique, serves the key effect of packing bore hole Reservoir Section.
In the face of down-hole complex environment, the packing element performance of open hole packer is that can determine one of the key factor of effective packing.Existing open hole packer mostly is single packing element, in the fracturing process of carrying out horizontal well bore hole staged fracturing completion technique, described packing element needs the pressure bearing separately its adjacent two net horizontal sections come, and then it is comparatively strict to the performance requirement of packing element, if there is packing element seal failure, just effectively can not carry out packing to the reservoir of net horizontal section, and then impact is produced.Because frac pressure in fracturing process is very huge, existing open hole packer relies on its single packing element to bear the pressure of adjacent two net horizontal sections, than being easier to the problem occurring packing element seal failure.
Utility model content
In view of the deficiencies in the prior art, the application provides a kind of open hole packer, can improve the problem that packing element seal failure easily appears in open hole packer in fracturing process.
For achieving the above object, the application provides a kind of open hole packer, comprising:
Central tube, its one end is connected with top connection, and the other end is connected with lower contact; The wall of described central tube is provided with open-work;
Packing element unit, it comprises the first packing element connecting described top connection and the second packing element connecting described lower contact;
Be sheathed on the fluid cylinder cover outside described central tube, it can sliding axially along described central tube; Described fluid cylinder cover has opposing right fluid cylinder cover first end and fluid cylinder overlaps the second end;
Be sheathed on described central tube outer and seal the first piston of fitting with the outer wall of described central tube, it can move to compress described first packing element to described top connection;
Fixing seal is sheathed on the outer and sliding sleeve between described fluid cylinder cover with described central tube of described first piston, its have back to sliding sleeve first end and sliding sleeve second end; Described sliding sleeve and described fluid cylinder overlap to seal fits;
The locking member be connected with described fluid cylinder cover, it can make described sliding sleeve only can move to described top connection; Described locking member together can move with described fluid cylinder cover;
The second piston be connected by setting pin with described sliding sleeve second end, it is outer and seal with the outer wall of described central tube and fit that it is sheathed on described central tube; Described second piston and described fluid cylinder overlap the second end fixed seal connection, and it can move to compress described second packing element to described lower contact; Be provided with pressure space between described second piston and described first piston, described pressure space is connected by the inside of described open-work with described central tube.
Preferably, be provided with in described pressure space and be sheathed on outside described central tube and the locking tube be fixedly connected with described second piston, the wall of described locking tube is provided with the hole slot run through, and described hole slot is built with lock dog; The position that described central tube closes on described open-work is provided with the sawtooth that can engage with described lock dog; Part or all of described open-work blocks by described lock dog; Described slide over the state of not setting under make described lock dog and described engagement.
Preferably, described locking member is sheathed on outside described sliding sleeve, and its inwall is provided with the first buckle teeth tilted to described top connection; Described sliding sleeve first end is provided with second buckle teeth that to be interlocked with described first buckle teeth; The inwall of described fluid cylinder cover first end is provided with the groove holding described locking member.
Preferably, described locking member is sheathed on outside described sliding sleeve, and its inwall is provided with the 3rd buckle teeth tilted to described top connection, and its outer wall is provided with the 4th buckle teeth; Described sliding sleeve first end is provided with the 5th buckle teeth be interlocked with described 3rd buckle teeth; Described fluid cylinder cover first end is provided with the 6th buckle teeth be interlocked with described 4th buckle teeth, and described 4th buckle teeth can forbid that described 6th buckle teeth produces relative motion.
Preferably, described first packing element comprises the first rubber cylinder pressing cap, the first rubber cylinder part that connect described top connection; Described first rubber cylinder part is pressed on described central tube by described first rubber cylinder pressing cap; Described second packing element comprises the second rubber cylinder pressing cap, the second rubber cylinder part that connect described lower contact; Described second rubber cylinder part is pressed on described central tube by described second rubber cylinder pressing cap.
Preferably, described first rubber cylinder part and described second rubber cylinder part include main packing element and are located at the auxiliary packing element of main packing element both sides; Be provided with spacer ring between described main packing element and described auxiliary packing element, be arranged with metal coating ring outside described auxiliary packing element, described main packing element is provided with metal gasket ring.
Preferably, described first rubber cylinder pressing cap and described top connection are threaded connection, and described second rubber cylinder pressing cap and described lower contact are threaded connection.
Preferably, described first rubber cylinder pressing cap and described top connection are also connected by the first anti-rotation pin, and described second rubber cylinder pressing cap and described lower contact are also connected by the second anti-rotation pin.
Preferably, described sliding sleeve first end and described first piston are threaded connection, and, be provided with sealing ring between described sliding sleeve and described first piston.
Preferably, described second piston and described locking tube and described fluid cylinder overlap the second end and are threaded connection, and described second piston and described fluid cylinder overlap between the second end and be provided with sealing ring.
By describing above and can finding out, the technical scheme that the application provides is by being provided with described first packing element and described second packing element, and be provided with and described first packing element and described second packing element can be compressed the described first piston and described second piston that set, make the first packing element described in the fracturing process after setting and described second packing element can bear the pressure of next adjacent level well section respectively, and then be not easy the situation occurring seal failure, so the open hole packer adopting the application to provide can improve the problem that packing element seal failure easily appears in open hole packer in fracturing process.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those skilled in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the open hole packer structural representation that a kind of embodiment of the application provides;
Fig. 2 is the 5th buckle teeth structural representation of the sliding sleeve of open hole packer shown in Fig. 1;
Fig. 3 is the 6th buckle teeth structural representation of the fluid cylinder cover of open hole packer shown in Fig. 1;
Fig. 4 is the structural representation of the locking member of open hole packer described in Fig. 1.
Detailed description of the invention
Technical scheme in the application is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all should belong to the scope of the utility model protection.
Refer to Fig. 1, a kind of embodiment of the application provides a kind of open hole packer, and comprising: central tube 1, its one end is connected with top connection 11, and the other end is connected with lower contact 12; The wall of described central tube 1 is provided with open-work 13; Packing element unit, it comprises the first packing element 2 connecting described top connection 11 and the second packing element 3 connecting described lower contact 12; Be sheathed on the fluid cylinder cover 6 outside described central tube 1, it can sliding axially along described central tube 1; Described fluid cylinder cover 6 have back to fluid cylinder overlap first end 61 and fluid cylinder overlaps the second end 62; Be sheathed on described central tube 1 outer and seal the first piston 4 of fitting with the outer wall of described central tube 1, it can move to compress described first packing element 2 to described top connection 11; Fixing seal is sheathed on the outer and sliding sleeve 5 between described fluid cylinder cover 6 and described central tube 1 of described first piston 4, its have back to sliding sleeve first end 51 and sliding sleeve second end 52; Described sliding sleeve 5 and described fluid cylinder overlap 6 and seal and fit; Overlap 6 locking members be connected 9 with described fluid cylinder, it can make described sliding sleeve 5 only can move to described top connection 11; Described locking member 9 together can move with described fluid cylinder cover 6; The second piston 7 be connected by setting pin 10 with described sliding sleeve second end 52, it is outer and seal with the outer wall of described central tube 1 and fit that it is sheathed on described central tube 1; Described second piston 7 overlaps the second end 62 fixed seal connection with described fluid cylinder, and it can move to compress described second packing element 3 to described lower contact 12; Be provided with pressure space between described second piston 7 and described first piston 4, described pressure space is connected by the inside of described open-work 13 with described central tube 1.
When using above-mentioned open hole packer, described open hole packer makes its both sides connect centralizer respectively by described top connection 11 and described lower contact 12, and then G.I.H is to design attitude, then carries out suppressing work.Hydraulic pressure enters into described pressure space through described central tube 1 through described open-work 13, and then hydraulic action promotes described first piston 4 and described second piston 7 moves dorsad in described first piston 4 and described second piston 7, described first piston 4 moves to described top connection 11 and then is compressed by described first packing element 2, and described second piston 7 moves to described lower contact 12 and then compressed by described second packing element 3.Meanwhile, owing to there is described locking member 9, described first piston 4 and described second piston 7 are locked mutually by described locking member 9, and then the compressive state making described first piston 4 and described second piston 7 keep described first packing element 2 and described second packing element 3.Along with proceeding until described packing element unit is compressed completely of suppressing, and then complete and set.
By describing above and can finding out, the technical scheme that present embodiment provides is by being provided with described first packing element 2 and described second packing element 3, and be provided with and described first packing element 2 and described second packing element 3 can be compressed the described first piston 4 and described second piston 7 that set, make the first packing element 2 and described second packing element 3 described in the fracturing process after setting can bear the pressure of next adjacent level well section respectively, and then be not easy the situation occurring seal failure, so the open hole packer adopting present embodiment to provide can improve the problem that packing element seal failure easily appears in open hole packer in fracturing process.
Simultaneously, at described open hole packer, there is described first packing element 2 and described second packing element 3 simultaneously, and when described first packing element 2 and described second packing element 3 set all completely, if there is seal failure problem in wherein said first packing element 2 or described second packing element 3, its another reservoir can also be continued to separate, and then can double insurance be played, the open hole packer that described present embodiment provides effectively can also ensure the normal sustained service of whole open hole packer.
Please continue to refer to Fig. 1, the body that described central tube 1 extends for lengthwise, its two ends connect described top connection 11 and described lower contact 12 respectively by tubing thread, and can connect the downhole tools such as centralizer by described top connection 11 and described lower contact 12.Described central tube 1 can be used for described first piston 4, described second piston 7 and described fluid cylinder cover 6 to slide axially along it, and then described first packing element 2 and described second packing element 3 is compressed.
Described packing element whole unit is set in outside described central tube 1, and it can be protruding and then set at predeterminated position by compression.Described packing element unit comprises described first packing element 2 and described second packing element 3.Described first packing element 2 connects described top connection 11, described second packing element 3 connects described lower contact 12, described first packing element 2 and described second packing element 3 can bear the frac pressure of next adjacent level well section respectively, and then ensure that the packing effect of described first packing element 2 and described second packing element 3 is not destroyed, and then be difficult to produce Problem of Failure.
Concrete, as shown in Figure 1, described first packing element 2 can comprise the first rubber cylinder pressing cap 21, first rubber cylinder part 22 connecting described top connection 11.Described first rubber cylinder part 22 is pressed on described central tube 1 by described first rubber cylinder pressing cap 21, and its entirety is set in outside described first rubber cylinder part 22.Described first rubber cylinder pressing cap 21 is threaded connection with described top connection 11, can be regulated the elasticity of described packing element by described first rubber cylinder pressing cap 21 when assembling.Rotate described first packing element 2 elasticity is changed to prevent from entering the first rubber cylinder pressing cap 21 described in process under instrument, described first rubber cylinder pressing cap 21 can also be connected by the first anti-rotation pin 211 with described top connection 11.
Described second packing element 3 can comprise the second rubber cylinder pressing cap 31, second rubber cylinder part 32 connecting described lower contact 12.Described second rubber cylinder part 32 is pressed on described central tube 1 by described second rubber cylinder pressing cap 31, and its entirety is set in outside described second rubber cylinder part 32.Described second rubber cylinder pressing cap 31 is threaded connection with described lower contact 12, can be regulated the elasticity of described packing element by described second rubber cylinder pressing cap 31 when assembling.Rotate described second packing element 3 elasticity is changed to prevent from entering the second rubber cylinder pressing cap 31 described in process under instrument, described second rubber cylinder pressing cap 31 is also connected by the second anti-rotation pin 311 with described lower contact 12.
Further, described first rubber cylinder part 22 all can comprise main packing element 221 with described second rubber cylinder part 32 and be located at the auxiliary packing element 222 of main packing element 221 both sides.Be provided with spacer ring 223 between described main packing element 221 and described auxiliary packing element 222, outside described auxiliary packing element 222, be arranged with metal coating ring 224, in described main packing element 221, be provided with metal gasket ring 225.
Described first piston 4 is sheathed on outside described central tube 1, and it is the actuating unit of whole open hole packer.As shown in Figure 1, described first packing element 2 is between described first piston 4 and described first rubber cylinder pressing cap 21, described first rubber cylinder pressing cap 21 is fixed in described top connection 11, and then can compress described first packing element 2 by the movement of described first piston 4 and set to complete.Described first piston 4 seals with the outer wall of described central tube 1 and fits, to prevent the pressure leakage in described pressure space.Concrete, sealing ring can be provided with between described first piston 4 and described central tube 1, and then sealing ring described in moving at described first piston 4 can ensure the sealing state of described first piston 4 and described central tube 1, certainly, also can take other seal approach, the application is not as limit.
Described sliding sleeve 5 fixed cover is located at outside described first piston 4, concrete, and described sliding sleeve first end 51 is threaded connection with described first piston 4, and, be provided with sealing ring between described sliding sleeve 5 and described first piston 4.Once enter, described sealing ring can relative to described sliding sleeve first end 51 with described first piston 4 connection of thread away from described top connection 11.Described sliding sleeve 5 is located at described first piston 4 and described fluid cylinder overlaps between 6, and itself and described fluid cylinder are similarly sealing fit-state between overlapping 6, concrete, and described sliding sleeve 5 and described fluid cylinder also can be provided with described sealing ring between overlapping 6.Set pin 10 described in described sliding sleeve second end 52 passes through to be connected with described second piston 7, the described pin 10 that sets is a shear pin, when hydraulic pressure in described pressure space is greater than its shear pressure, the described pin 10 that sets is cut off by described sliding sleeve 5, and then described first piston 4 pulls described sliding sleeve 5 to move and compressed by described first packing element 2.
For ensureing that described first packing element 2 is locked after setting, described sliding sleeve 5 and described fluid cylinder are provided with described locking member 9 between overlapping 6, and described locking member 9 entirety is an opening annulus, and then has certain reduced diameter recovery capability.Described locking member 9 overlaps 6 with described fluid cylinder and links together, and can with described fluid cylinder cover 6 sliding axially along described central tube 1.Described locking member 9 can make described sliding sleeve 5 only can move to described top connection 11.
Concrete, in the application one preferably embodiment, described locking member 9 can be sheathed on outside described sliding sleeve 5, and its inwall is provided with the first buckle teeth tilted to described top connection 11.Described sliding sleeve first end 51 is provided with second buckle teeth that to be interlocked with described first buckle teeth.The inwall of described fluid cylinder cover first end 61 is provided with the groove holding described locking member 9.Can find out, because described locking member 9 is positioned at the described groove of described fluid cylinder cover 6, and then it can move with described fluid cylinder cover 6.Simultaneously, because locking member 9 has described first buckle teeth, and then make described sliding sleeve 5 only when moving to described top connection 11, described second buckle teeth could move along the teeth directional of described first buckle teeth, make described locking member 9 reduce certain external diameter, and then described first buckle teeth and described second buckle teeth just can produce relative motion.Otherwise described second buckle teeth cannot retreat under the effect of described first buckle teeth.
Further, refer to Fig. 2, Fig. 3 and Fig. 4, the application another preferably in embodiment, described locking member 9 can be sheathed on outside described sliding sleeve 5, as shown in Figure 4, the inwall of described locking member can be provided with the 3rd buckle teeth 91 tilted to described top connection 11, and its outer wall can be provided with the 4th buckle teeth 92.As shown in Figure 2, described sliding sleeve first end 51 is provided with the 5th buckle teeth 511 be interlocked with described 3rd buckle teeth 91.As shown in Figure 3, described fluid cylinder cover first end 61 is provided with the 6th buckle teeth 611 be interlocked with described 4th buckle teeth 92.Described 4th buckle teeth 92 can forbid that described 6th buckle teeth 611 produces relative motion.The teeth directional of described 4th buckle teeth 92 no requirement (NR), it has larger tooth depth relative to described first buckle teeth, and then after described 4th buckle teeth 92 fastens with described 6th buckle teeth 611, no matter described locking member 9 how reduced outside diameter, described 6th buckle teeth 611 all keeps buckling state with described 4th buckle teeth 92, and then cannot produce relative motion.
Described fluid cylinder cover 6 is sheathed on outside described central tube 1, and its entirety is tubulose.Described fluid cylinder cover 6 together can move with described second piston 7, and meanwhile, it provides reaction force for described first piston 4 maintains described first packing element 2 compression.Annular space between described fluid cylinder cover 6 and described central tube 1 is provided with described sliding sleeve 5, and the part of described first piston 4 and described second piston 7 also stretches into the annular space between described fluid cylinder cover 6 and described central tube 1.Concrete, in the annular space of described pressure space also between described fluid cylinder cover 6 and described central tube 1.
Described second piston 7 is sheathed on outside described central tube 1, and it is similarly the actuating unit of described open hole packer, and it provides pressure for described second packing element 3 of described compression.As shown in Figure 2, described second packing element 3 is between described second piston 7 and described second rubber cylinder pressing cap 31, and described in when described second piston 7 moves to described lower contact 12, described second packing element 3 has compressed to set by the second piston 7.Described second piston 7 seals with the outer wall of described central tube 1 fits, and overlaps the second end 62 fixed seal connection with described fluid cylinder, and then ensures that the pressure in described pressure space is not leaked.Concrete, be provided with sealing ring between described second piston 7 and the outer wall of described central tube 1, described second piston 7 and described fluid cylinder overlap the second end 62 for being threaded, and are provided with sealing ring equally.When described second piston 7 moves to described lower contact 12, described second piston 7 pulls described fluid cylinder to overlap 6 and moves together, simultaneously, described fluid cylinder cover 6 pulls described locking member 9 to move, in described pressure space hydraulic pressure effect under, described second piston 7 and described sliding sleeve 5 can be motionless or continue described first packing element 2 of compression.
Please continue to refer to Fig. 1, in the embodiment that the application one is feasible, can be provided with in described pressure space and be sheathed on outside described central tube 1 and the locking tube 8 be fixedly connected with described second piston 7.The wall of described locking tube 8 is provided with the hole slot run through.Described hole slot is built with lock dog 81.The position that described central tube 1 closes on described open-work 13 is provided with the sawtooth that can engage with described lock dog 81.Part or all of described open-work 13 blocks by described lock dog 81.Described sliding sleeve 5 to make described lock dog 81 and described engagement not setting under state.Described lock dog 81 can just to described open-work 13 and with described engagement, but not by the shutoff of described open-work 13.As shown in Figure 1, described lock dog 81 is positioned at described hole slot, side and described engagement, sliding sleeve 5 described in opposite side contact.Described lock dog 81 can move radially along described central tube 1 in described hole slot, and after described sliding sleeve 5 moves, described lock dog 81 can be backed down by hydraulic pressure.
Can find out, enter in process under described open hole packer G.I.H, may the situations such as pressure oscillation be there is in well, when owing to there is described locking tube 8 and described lock dog 81, make described first packing element 2 and described second packing element 3 there will not be the situation of premature setting.Meanwhile, due to the existence of described lock dog 81, described second piston 7 just can must move after the up segment distance of described sliding sleeve 5, and then carrying out smoothly of ensure that whole open hole packer sets.More than show and describe general principle of the present utility model, principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and manual just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims (10)

1. an open hole packer, is characterized in that, comprising:
Central tube, its one end is connected with top connection, and the other end is connected with lower contact; The wall of described central tube is provided with open-work;
Packing element unit, it comprises the first packing element connecting described top connection and the second packing element connecting described lower contact;
Be sheathed on the fluid cylinder cover outside described central tube, it can sliding axially along described central tube; Described fluid cylinder cover has opposing right fluid cylinder cover first end and fluid cylinder overlaps the second end;
Be sheathed on described central tube outer and seal the first piston of fitting with the outer wall of described central tube, it can move to compress described first packing element to described top connection;
Fixing seal is sheathed on the outer and sliding sleeve between described fluid cylinder cover with described central tube of described first piston, its have back to sliding sleeve first end and sliding sleeve second end; Described sliding sleeve and described fluid cylinder overlap to seal fits;
The locking member be connected with described fluid cylinder cover, it can make described sliding sleeve only can move to described top connection; Described locking member together can move with described fluid cylinder cover;
The second piston be connected by setting pin with described sliding sleeve second end, it is outer and seal with the outer wall of described central tube and fit that it is sheathed on described central tube; Described second piston and described fluid cylinder overlap the second end fixed seal connection, and it can move to compress described second packing element to described lower contact; Be provided with pressure space between described second piston and described first piston, described pressure space is connected by the inside of described open-work with described central tube.
2. open hole packer as claimed in claim 1, it is characterized in that: be provided with in described pressure space and be sheathed on outside described central tube and the locking tube be fixedly connected with described second piston, the wall of described locking tube is provided with the hole slot run through, and described hole slot is built with lock dog; The position that described central tube closes on described open-work is provided with the sawtooth that can engage with described lock dog; Part or all of described open-work blocks by described lock dog; Described slide over the state of not setting under make described lock dog and described engagement.
3. open hole packer as claimed in claim 1, it is characterized in that: described locking member is sheathed on outside described sliding sleeve, its inwall is provided with the first buckle teeth tilted to described top connection; Described sliding sleeve first end is provided with second buckle teeth that to be interlocked with described first buckle teeth; The inwall of described fluid cylinder cover first end is provided with the groove holding described locking member.
4. open hole packer as claimed in claim 1, it is characterized in that: described locking member is sheathed on outside described sliding sleeve, its inwall is provided with the 3rd buckle teeth tilted to described top connection, and its outer wall is provided with the 4th buckle teeth; Described sliding sleeve first end is provided with the 5th buckle teeth be interlocked with described 3rd buckle teeth; Described fluid cylinder cover first end is provided with the 6th buckle teeth be interlocked with described 4th buckle teeth, and described 4th buckle teeth can forbid that described 6th buckle teeth produces relative motion.
5. open hole packer as claimed in claim 1, is characterized in that: described first packing element comprises the first rubber cylinder pressing cap, the first rubber cylinder part that connect described top connection; Described first rubber cylinder part is pressed on described central tube by described first rubber cylinder pressing cap; Described second packing element comprises the second rubber cylinder pressing cap, the second rubber cylinder part that connect described lower contact; Described second rubber cylinder part is pressed on described central tube by described second rubber cylinder pressing cap.
6. open hole packer as claimed in claim 5, is characterized in that: described first rubber cylinder part and described second rubber cylinder part include main packing element and be located at the auxiliary packing element of main packing element both sides; Be provided with spacer ring between described main packing element and described auxiliary packing element, be arranged with metal coating ring outside described auxiliary packing element, described main packing element is provided with metal gasket ring.
7. open hole packer as claimed in claim 5, it is characterized in that: described first rubber cylinder pressing cap and described top connection are threaded connection, described second rubber cylinder pressing cap and described lower contact are threaded connection.
8. open hole packer as claimed in claim 7, it is characterized in that: described first rubber cylinder pressing cap and described top connection are also connected by the first anti-rotation pin, described second rubber cylinder pressing cap and described lower contact are also connected by the second anti-rotation pin.
9. open hole packer as claimed in claim 1, is characterized in that: described sliding sleeve first end and described first piston are threaded connection, and, be provided with sealing ring between described sliding sleeve and described first piston.
10. open hole packer as claimed in claim 2, is characterized in that: described second piston and described locking tube and described fluid cylinder overlap the second end and be threaded connection, and described second piston and described fluid cylinder overlap between the second end and be provided with sealing ring.
CN201520264873.3U 2015-04-28 2015-04-28 Open hole packer Withdrawn - After Issue CN204627523U (en)

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Application Number Priority Date Filing Date Title
CN201520264873.3U CN204627523U (en) 2015-04-28 2015-04-28 Open hole packer

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Application Number Priority Date Filing Date Title
CN201520264873.3U CN204627523U (en) 2015-04-28 2015-04-28 Open hole packer

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CN204627523U true CN204627523U (en) 2015-09-09

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CN201520264873.3U Withdrawn - After Issue CN204627523U (en) 2015-04-28 2015-04-28 Open hole packer

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104847301A (en) * 2015-04-28 2015-08-19 中国石油天然气股份有限公司 Open hole packer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104847301A (en) * 2015-04-28 2015-08-19 中国石油天然气股份有限公司 Open hole packer
CN104847301B (en) * 2015-04-28 2017-12-05 中国石油天然气股份有限公司 Open hole packer

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