CN202117614U - Mechanical locking device for packer - Google Patents
Mechanical locking device for packer Download PDFInfo
- Publication number
- CN202117614U CN202117614U CN2011202035717U CN201120203571U CN202117614U CN 202117614 U CN202117614 U CN 202117614U CN 2011202035717 U CN2011202035717 U CN 2011202035717U CN 201120203571 U CN201120203571 U CN 201120203571U CN 202117614 U CN202117614 U CN 202117614U
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- lock
- piston
- bit
- cylinder sleeve
- packer
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Abstract
The utility model relates to the field of the acid fracturing operation of a deep well in an oil field, in particular to a mechanical locking device for a packer. The mechanical locking device for the packer is characterized in that the mechanical locking device comprises a locking block, a locking position piston, a locking position regulating sleeve, a locking position shear pin and a locking block fixing sleeve; an upper set piston cylinder sleeve, a lower set piston cylinder sleeve and a middle movable piston are connected into an integrated double piston surface acting set piston cylinder by screw threads; the locking position regulating sleeve is arranged between a lower center pipe and the lower set piston cylinder sleeve and is fixed on the lower center pipe through the locking position shear pin; the locking position piston is fixed in a cavity formed by the lower set piston cylinder sleeve, the locking position regulating sleeve and the lower center pipe; the locking position piston is provided with a boss surface and a sunken surface; a water passage is arranged at a lower middle joint; a lower set hydraulic cylinder sleeve, the locking position regulating sleeve, the lower center pipe and the lower middle joint are combined into one unlocking piston cavity; and an inner cavity of a pipe column in the packer is communicated with the unlocking piston cavity through the water passage. The mechanical locking device overcomes the defect of setting in the going-down process of the packer in the prior art.
Description
Technical field
The utility model relates to oil field deep well acid fracturing operation field, particularly a kind of mechanical locking that is used for packer.
Background technology
Existing Y344 type packer is a kind of packer commonly used in the operation of oil field deep well acid fracturing, possesses resistance to elevated temperatures and waits the use advantage well.But it can take place brill to set or sit the card problem midway in use at the scene successively.Packer is in case take place to set or to sit the card phenomenon midway, or can't continue to bore down, otherwise reluctantly down behind design attitude during construction packer do not set, this type of problem has a strong impact on construction quality and process.
In order to address this problem, in the construction of oil gas field acid fracturing, attempting promoting K type series packer successively, this packer than Y344 type packer have anti-brill down set midway effective, deblocking is easy etc. uses advantage.But because the backwardness of domestic rubber technology, the high temperature high voltage resistant performance of homemade compression packing element uses the external similar packing element cost of producing again than higher much larger than the expanding packing element.Like this, K type series packer uses limited in the operation of deep-well acid fracturing, still has good use prospect so Y344 type packer is current.Yet,, just must manage to solve or reduce its going down process to set risk midway if will continue to use smoothly Y344 type packer.
The utility model content
The technical problem that the utility model will solve provides a kind of mechanical locking that is used for packer, to overcome the defective that the packer that exists in the prior art sets at going down process midway.
The technical scheme of the utility model is: a kind of mechanical locking that is used for packer; Comprise setting piston rod cylinder sleeve, middle moving piston, setting piston rod cylinder sleeve, lower center tube and following transition joint down, it is characterized in that: comprise lock dog, lock-bit piston, lock-bit regulating sleeve, lock-bit shear pin and lock dog fixed cover; Set the piston rod cylinder sleeve on said, set the integral body that piston rod cylinder sleeve and middle moving piston utilize screwed connection to become the effect of a double-piston face down and set piston rod; Said lock-bit regulating sleeve be arranged at lower center tube and under set between the piston rod cylinder sleeve, and be fixed on the lower center tube through the lock-bit shear pin; Said lock-bit piston is fixed in the cavity that sets piston rod cylinder sleeve, lock-bit regulating sleeve and lower center tube formation down, and the lock-bit piston is provided with boss face and concave face; Said transition joint down is provided with hydrophthalmia, and setting hydraulic cylinder cylinder sleeve, lock-bit piston, lower center tube and following transition joint is combined into a release piston chamber down, and hydrophthalmia is connected the tubing string inner chamber in the packer with release piston chamber; Said lock dog fixed cover is arranged in the release piston chamber and is fixed in the transition joint down; Lock dog is arranged on the lock dog fixed cover and is stuck in down between the lock-bit limiting stand terrace and the boss face on the lock-bit piston that sets on the piston rod cylinder sleeve; Set relative fixed between piston rod cylinder sleeve and the lock-bit regulating sleeve under making; Wherein, lock dog can be in the spacing that sets the boss face on piston rod cylinder sleeve and the lock-bit piston down and is set down between the spacing of the concave face on piston rod cylinder sleeve and the lock-bit piston and move radially; Lower center tube is provided with release limiting stand terrace, and the descending maximum displacement of restriction lock-bit piston is avoided staggering relatively with the lower end that sets the piston rod cylinder sleeve down.
Said lock dog radially circumference uniform distribution on the lock dog fixed cover.
The lock dog of said radially circumference uniform distribution on the lock dog fixed cover is three.
The technique effect of the utility model is:
The packer setting piston rod is fixed in going down process all the time; Having avoided setting the piston rod accident that brill sets under action compresses packing element generation packer under the water machine differential pressure action midway takes place; Packer transfer to behind the precalculated position capable of using again in tubing string the pump fluid injection press the fixation of removing the packer setting piston rod, packer can normally set and use.
Description of drawings
Below in conjunction with the embodiment accompanying drawing the utility model is further specified:
Fig. 1 is the general structure sketch map of embodiment;
Fig. 2 is the local structure for amplifying sketch map of mechanical lock mechanism at lock-out state;
Fig. 3 is the local structure for amplifying sketch map of mechanical lock mechanism at released state;
Fig. 4 is the assembly structure sketch map of existing Y344 type packer.
Reference numeral is following:
1. set the piston rod cylinder sleeve on; 2. middle moving piston; 3. set the piston rod cylinder sleeve down; 4. mechanical lock mechanism; 5. hydrophthalmia; 6. lock dog; 7. lock-bit piston; 8. lock-bit regulating sleeve; 9. lock-bit shear pin; 10. lower center tube; 11. release limiting stand terrace; 12. following transition joint; 14. lock-bit limiting stand terrace; 15. lock dog fixed cover; 16. boss face; 17. concave face.
The specific embodiment
The utility model relates to oil gas field stimulation technology field, is one of underground work instrument commonly used in the operation of oil gas field deep-well acid fracturing.
The utility model is that a kind of mechanical lock mechanism has been added in design on packer original structure basis; Utilize mechanical lock mechanism 4, realize to by on set piston rod cylinder sleeve 1, middle moving piston 2 and set the link together integral body formed of piston rod cylinder sleeve 3 down and set the qualification of the athletic performance of piston rod.The utility model can be in going down process all the time with the setting mechanism locking of packer; Have only when under the packer behind the precalculated position, when pump was annotated highly pressurised liquid in tubing string, mechanical lock mechanism could release; Releasing normally sets packer to the locking of packer setting mechanism.
The structure of the utility model is:
Referring to Fig. 2 and Fig. 3; The utility model comprises and sets piston rod cylinder sleeve 1, middle moving piston 2, sets piston rod cylinder sleeve 3, lower center tube 10 and following transition joint 12 down, also comprises lock dog 6, lock-bit piston 7, lock-bit regulating sleeve 8, lock-bit shear pin 9 and lock dog fixed cover 15; Set piston rod cylinder sleeve 1 on said, set the integral body that piston rod cylinder sleeve 3 and middle moving piston 2 utilize screwed connection to become the effect of a double-piston face down and set piston rod; Said lock-bit regulating sleeve 8 be arranged at lower center tube 10 and under set between the piston rod cylinder sleeve 3, and be fixed on the lower center tube 10 through lock-bit shear pin 9; Said lock-bit piston 7 is fixed in the cavity that sets piston rod cylinder sleeve 3, lock-bit regulating sleeve 8 and lower center tube 10 formation down, and lock-bit piston 7 is provided with boss face 16 and concave face 17; Said transition joint 12 down is provided with hydrophthalmia 5, and setting hydraulic cylinder cylinder sleeve 3, lock-bit piston 7, lower center tube 10 and following transition joint 12 is combined into a release piston chamber down, and hydrophthalmia 5 is connected the tubing string in the packer with release piston chamber; Said lock dog fixed cover 15 is arranged in the release piston chamber and is fixed in the transition joint 12 down; Lock dog 6 is arranged on the lock dog fixed cover 15 and is stuck in down between the lock-bit limiting stand terrace 14 and the boss face 16 on the lock-bit piston 7 that sets on the piston rod cylinder sleeve 3; Set relative fixed between piston rod cylinder sleeve 3 and the lock-bit regulating sleeve 8 under making; Wherein, lock dog 6 can and time set between the spacing of the concave face 17 on piston rod cylinder sleeve 3 and the lock-bit piston 7 in the spacing that sets the boss face 16 on piston rod cylinder sleeve 3 and the lock-bit piston 7 down and move radially; Lower center tube 10 is provided with release limiting stand terrace 11.
Integral body sets piston rod and limits upper and lower two and set hydraulic cylinder and act on separately, makes that the utility model is that mechanical lock mechanism 4 can limit two actions that set that set piston rod simultaneously.Lock-bit piston 7 through lock-bit regulating sleeve 8, lock-bit shear pin 9 and lower center tube 10 relative fixed, has guaranteed that lock-bit piston 7 is in latched position all the time before release before release.The following of existing Y344 type packer set piston rod cylinder sleeve 3 lengthenings and be designed with lock-bit limiting stand terrace 14; In addition under set between piston rod cylinder sleeve 3 and the lower center tube 10 design and added mechanical lock mechanism 4; Can integral body be set hydraulic cylinder with lower center tube 10 relative fixed together; Mechanical lock mechanism 4 not releases, integral body set fixing between hydraulic cylinder and the lower center tube 10 and do not remove.Rely on transition joint 12 down and hydrophthalmia 5 above it, lower center tube 10, set that hydraulic cylinder cylinder sleeve 3, lock-bit piston 7 be combined into down can utilize the liquid release of tubing string inner high voltage and and wholely set hydraulic cylinder and set the opposite release piston chamber of traffic direction; Guaranteed the sequence of movement that sets after the first release; In case and release, just can not influence the operation that sets of packer again.
Lock dog 6 radially circumference uniform distribution on lock dog fixed cover 15, to realize lock function.
In order to realize fixed effect better, radially the lock dog 6 of circumference uniform distribution on lock dog fixed cover 15 is three.
Referring to Fig. 1; With existing two cylinder sleeves that set piston rod as shown in Figure 4 that can act on separately; Set hydraulic cylinder cylinder sleeve 1 promptly, set piston rod cylinder sleeve 3 down; And the integral body that middle moving piston 2 utilizes the metric system screwed connection to become the effect of a double-piston face sets piston rod, and added a mechanical lock mechanism as shown in Figure 24 setting between piston rod cylinder sleeve 3 and the lower center tube 10 design down.In the going down process; Lock-bit piston 7 is fixed on latched position shown in Figure 2 all the time through lock-bit regulating sleeve 8, lock-bit shear pin 9 and lower center tube 10; Integral body sets piston rod and is in the same place with lower center tube 10 relative fixed through lock dog 6, so just can guarantee that integral body sets piston rod in the going down process can under effects such as water attack pressure reduction, not cause packer to set card midway by up compression packer packing element.
The course of work of the utility model is following:
Referring to Fig. 2 and Fig. 3; After packer arrives the desired depth position down; Pump is annotated highly pressurised liquid in the tubing string, and high pressure liquid cognition is passed down transition joint hydrophthalmia 5 and acted on the lock-bit piston 7, and the downward active force that lock-bit piston 7 forms under hydraulic action passes to lock-bit shear pin 9 through lock-bit regulating sleeve 8; When this downward active force will be cut off lock-bit shear pin 9 during greater than the shear stress of lock-bit shear pin 9; Make lock-bit shear pin 9 remove the qualification to lock-bit piston 7, hydraulic coupling can continue to promote lock-bit piston 7 and come downwards to release limiting stand terrace 11 places, and release limiting stand terrace 11 restriction lock-bit pistons 7 continue descending; The effect of limiting stand terrace 11 is the descending maximum displacements that when release, accurately limit lock-bit piston 7; Avoid because of down line displacement is excessive, staggering relatively with the lower end that sets piston rod cylinder sleeve 3 down, (because at release and packer setting earlier in latter two process, lock-bit piston 7 and following sets between the piston rod cylinder sleeve and is relatively " opposing and go "; Be that lock-bit piston 7 moves down; Under set piston rod cylinder sleeve 3 and move up), the release piston chamber and the packer external space UNICOM that cause setting by transition joint 12 down, down hydraulic cylinder cylinder sleeve 3, lock-bit piston 7, lower center tube 10 and following transition joint 12 combinations, and packer inner chamber and external space when normal use are not allow UNICOM.The supporting surface of 7 pairs of lock dogs 6 of lock-bit piston this moment changes, and the supporting surface of 7 pairs of lock dogs 6 of lock-bit piston becomes concave face 17 by boss face 16, has abdicated locational space for lock dog 6 radially bounces back along packer.In addition, hydraulic pressure also sets piston rod to integral body and produces active force in the tubing string when lock-bit piston 7 is produced active force, but the direction of active force is different, and downward to the active force of lock-bit piston 7, the active force that integral body is set piston rod makes progress.When lock-bit piston 7 is not abdicated the space that radially bounces back for lock dog 6; When promptly not accomplishing lock-bit piston 7 and under hydraulic action, cutting off the action of lock-bit shear pin 9; Though hydraulic pressure sets the piston rod generation to integral body active force is upwards arranged; The upwards trend of motion is arranged, if but lock dog 6 does not radially bounce back the space, lock dog 6 will match with the following lock-bit limiting stand terrace 14 that sets design on the piston rod cylinder sleeve 3 that has extended; Firm integral body is set piston rod with lower center tube 10 relative fixed in together, restriction integral body sets piston rod and moves upward.When lock-bit piston 7 after behavior lock dog 6 abdicates the space that radially bounces back under earlier under the hydraulic action; Lock dog 6 will receive lock-bit limiting stand terrace 14 radial compression power; And in this radial compression power (under the hydraulic action; There is trend and the power that moves upward all the time in the lock-bit limiting stand terrace 14 that integral body sets on the piston rod, and lock-bit limiting stand terrace 14 produces the radial compression power to lock dog 6 all the time) effect under retraction radially.Under the effect of hydraulic pressure, lock-bit piston 7 continues to receive downward active force, and integral body sets piston rod and continues to receive active force upwards, only cut off under hydraulic action to lock-bit shear pin 9, thereby mechanical lock mechanism 4 releasings sets the fixing of piston rod to integral body.In case mechanical lock mechanism 4 releases, integral body set hydraulic cylinder and will under hydraulic action, move upward freely, the compression packer packing element is realized setting.The piston stroking upward compression packing element that sets after the release realizes that the principle that sets belongs to known technology, i.e. the inherent structure principle and the public technology of packer.
Claims (3)
1. mechanical locking that is used for packer; Comprise setting piston rod cylinder sleeve (1), middle moving piston (2), setting piston rod cylinder sleeve (3), lower center tube (10) and following transition joint (12) down, it is characterized in that: comprise lock dog (6), lock-bit piston (7), lock-bit regulating sleeve (8), lock-bit shear pin (9) and lock dog fixed cover (15); Set piston rod cylinder sleeve (1) on said, set the integral body that piston rod cylinder sleeve (3) and middle moving piston (2) utilize screwed connection to become the effect of a double-piston face down and set piston rod; Said lock-bit regulating sleeve (8) be arranged at lower center tube (10) and under set between the piston rod cylinder sleeve (3), and be fixed on the lower center tube (10) through lock-bit shear pin (9); Said lock-bit piston (7) is fixed in the cavity that sets piston rod cylinder sleeve (3), lock-bit regulating sleeve (8) and lower center tube (10) formation down, and lock-bit piston (7) is provided with boss face (16) and concave face (17); Said transition joint (12) down is provided with hydrophthalmia (5); Under set hydraulic cylinder cylinder sleeve (3), lock-bit piston (7), lower center tube (10) and following transition joint (12) and be combined into a release piston chamber, hydrophthalmia (5) is connected the tubing string inner chamber in the packer with release piston chamber; Said lock dog fixed cover (15) is arranged in the release piston chamber and is fixed in the transition joint (12) down, and lock dog (6) is arranged at lock dog fixed cover (15) and goes up and be stuck in down between the lock-bit limiting stand terrace (14) and the boss face (16) on the lock-bit piston (7) that sets on the piston rod cylinder sleeve (3).
2. a kind of mechanical locking that is used for packer according to claim 1 is characterized in that: said lock dog (6) radially circumference uniform distribution on lock dog fixed cover (15).
3. a kind of mechanical locking that is used for packer according to claim 2 is characterized in that: the lock dog (6) of said radially circumference uniform distribution on lock dog fixed cover (15) is three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202035717U CN202117614U (en) | 2011-06-16 | 2011-06-16 | Mechanical locking device for packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202035717U CN202117614U (en) | 2011-06-16 | 2011-06-16 | Mechanical locking device for packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202117614U true CN202117614U (en) | 2012-01-18 |
Family
ID=45458687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202035717U Expired - Fee Related CN202117614U (en) | 2011-06-16 | 2011-06-16 | Mechanical locking device for packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202117614U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114809976A (en) * | 2021-01-21 | 2022-07-29 | 中国石油天然气股份有限公司 | Soluble packer and multistage sliding sleeve fracturing string |
-
2011
- 2011-06-16 CN CN2011202035717U patent/CN202117614U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114809976A (en) * | 2021-01-21 | 2022-07-29 | 中国石油天然气股份有限公司 | Soluble packer and multistage sliding sleeve fracturing string |
| CN114809976B (en) * | 2021-01-21 | 2023-12-22 | 中国石油天然气股份有限公司 | Soluble packer and multistage sliding sleeve fracturing string |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120118 Termination date: 20150616 |
|
| EXPY | Termination of patent right or utility model |