CN103291240A - Packer central pipe unscrewing-resistant locking mechanism and packer with mechanism - Google Patents
Packer central pipe unscrewing-resistant locking mechanism and packer with mechanism Download PDFInfo
- Publication number
- CN103291240A CN103291240A CN2013102436881A CN201310243688A CN103291240A CN 103291240 A CN103291240 A CN 103291240A CN 2013102436881 A CN2013102436881 A CN 2013102436881A CN 201310243688 A CN201310243688 A CN 201310243688A CN 103291240 A CN103291240 A CN 103291240A
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- China
- Prior art keywords
- central tube
- lock ring
- packer
- connects
- inner chamber
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- Earth Drilling (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention provides a packer central pipe unscrewing-resistant locking mechanism and a packer with the mechanism. An upper locking ring which is used for connecting an upper connector of the packer and the upper end of a central pipe of the packer, a lower locking ring which is used for connecting the lower end of the central pipe and a lower connector of the packer, and non-taper threads which are arranged on the inner surface of the upper connector, the inner surface of the lower connector, the outer surface of the upper end of the central pipe and the outer surface of the lower end of the central pipe. The upper end and the lower end of the central pipe are respectively connected with the upper connector and the lower connector through the non-tape threads. The upper locking ring and the lower locking ring both comprise a large head ends which are blocked in periphery steps in the upper connector and the lower connector in a clamping mode, and small head ends which are connected with inner cavities of the central pipe through levorotation non-taper threads. The small head end of the upper locking ring is connected with an upper end inner cavity of the central pipe through levorotation non-taper threads, and the small head end of the lower locking ring is connected with a lower end inner cavity of the central pipe through levorotation non-taper threads. Unscrewing is avoided, falling off of a tubular column is avoided effectively, and using safety is improved.
Description
Technical field
The invention belongs to oil gas field stimulation technology field, is one of underground work instrument important in oil, gas field pressure break, the acidizing treatment operation, specifically is that packer central tube anti-back padlock is decided mechanism and contained the packer of this locking mechanism.
Background technology
Packer is most important a kind of conventional instrument in oil field compression fracture, the acidizing treatment.The upper and lower joint of a large amount of K344 type packers that use adopts the API tubing thread to connect with being connected of central tube at present.This connection has the defective that rigging error is big, the size of central tube is connected the button-type restriction, and this structure is not easy to move back button when tubing thread connection moment of torsion reaches designing requirement, causes tubing string to come off.
Summary of the invention
The objective of the invention is to overcome existing packer connects existing rigging error and occurs the problem of moving back mouth and causing tubing string to come off greatly, easily because adopting tubing thread to carry out central tube with upper and lower joint.
For this reason, the invention provides packer central tube anti-back padlock and decide mechanism, comprise last lock ring for the top connection that connects packer and the upper end of the central tube of packer, for the following lock ring of the lower contact of the lower end that connects this central tube and packer and be arranged on non-taper thread on the external surface of the inner surface of top connection, lower contact, the upper end that is arranged on central tube, lower end, the upper and lower end of central tube passes through this non-taper thread and connects with this top connection, lower contact respectively;
The little head end that last lock ring and following lock ring include the stub end in the circumferential step of block in top connection, lower contact and connect with the inner chamber of central tube by left-handed non-taper thread;
The little head end of last lock ring connects with the upper end inner chamber of central tube by left-handed non-taper thread; The little head end of following lock ring connects with the lower end inner chamber of central tube by left-handed non-taper thread.
A kind ofly contain the packer that central tube anti-back padlock is decided mechanism, comprise central tube, the top connection, the lower contact that connect with the upper and lower end of central tube respectively, central tube connects respectively at top connection, lower contact by non-taper thread, and the top connection inner chamber connects with central tube upper end inner chamber by last lock ring, and lock ring connected with central tube lower end inner chamber under the lower contact inner chamber passed through;
The upper end block of last lock ring is on the circumferential step of top connection inner chamber, and the lower end of last lock ring connects with the upper end of central tube by left-handed non-taper thread, and the upper end external diameter of last lock ring is greater than the lower end external diameter of last lock ring;
The lower end block of following lock ring is on the circumferential step of lower contact inner chamber, and the upper end of following lock ring connects with the lower end of central tube by left-handed non-taper thread, and the upper end external diameter of following lock ring is less than the lower end external diameter of following lock ring.
The packer that packer central tube anti-back padlock provided by the invention is decided mechanism and contained this locking mechanism has been avoided the rigging error problem of packer, and the generation that has prevented from moving back mouthful has effectively stoped the generation of the phenomenon that tubing string comes off, and has improved safety in utilization.
Description of drawings
Below with reference to accompanying drawing the present invention is described in further details:
Fig. 1 contains the schematic diagram that central tube anti-back padlock is decided the packer of mechanism.
Among the figure: 1, top connection; 2, go up lock ring; 3, central tube; 4, go up glue tube base; 5, cylinder base; 6, lower rubber cylinder seat; 7, lower contact; 8, following lock ring.
The specific embodiment
Carry out central tube and last in order to overcome existing packer because adopting tubing thread, it is big that lower contact connects existing rigging error, the problem that occurs easily moving back mouthful and cause tubing string to come off, in conjunction with Fig. 1 as seen, present embodiment provides a kind of packer central tube anti-back padlock to decide mechanism, comprise for the last lock ring 2 of the top connection 1 that connects packer with the upper end of the central tube 3 of packer, be used for to connect the lower end of this central tube 3 and packer lower contact 7 following lock ring 8 and be arranged on top connection 1, on the inner surface of lower contact 7, be arranged on the upper end of central tube 3, non-taper thread on the external surface of lower end is on the central tube 3, the lower end by this non-taper thread respectively with this top connection 1, lower contact 7 connects;
The little head end that last lock ring 2 and following lock ring 8 include the stub end in the circumferential step of block in top connection 1, lower contact 7 and connect with the inner chamber of central tube 3 by left-handed non-taper thread;
The little head end of last lock ring 2 connects with the upper end inner chamber of central tube 3 by left-handed non-taper thread; The little head end of following lock ring 8 connects with the lower end inner chamber of central tube 3 by left-handed non-taper thread.
Above-mentioned packer central tube anti-back padlock is decided mechanism to be applied in the packer, making existing tubing thread with tapering into non-taper thread, and by this non-taper thread realization upper and lower side of central tube 3 and connecting of top connection 1, lower contact 7, be not difficult to find out by Fig. 1, specifically be that external surface at the upper and lower side of central tube 3 arranges non-taper thread, at the inner surface of top connection 1 and lower contact 7 non-taper thread is set, bear axial tension and dextrorotation (dextrorotation) moment of torsion by non-taper thread.
Simultaneously, connecting of inner chamber by last lock ring 2 and the 8 realization top connections 1 of following lock ring, lower contact 8 and the upper and lower side of central tube 3, specifically be to go up the upper end block of lock ring 2 on the circumferential step of top connection 1 inner chamber, the lower end of last lock ring 2 connects with the upper end inner chamber of central tube 3 by left-handed non-taper thread, and the upper end of last lock ring 2 (stub end) external diameter is greater than lower end (following head end) external diameter of last lock ring 2; The lower end block of following lock ring 8 is on the circumferential step of lower contact 7 inner chambers, and the upper end of following lock ring 8 (little head end) connects with the lower end of central tube 3 by left-handed non-taper thread, and the upper end external diameter of following lock ring 8 is less than lower end (stub end) external diameter of following lock ring 8.Thus, when reactive torque appears in tubing string, suppose that this reactive torque acts on top connection 1, on the non-taper thread of lower contact 7 and central tube 3, the trend of button appears moving back in connecting thread, because last lock ring 2, following lock ring 8 is that left-hand thread connects with being connected of central tube 3, when central tube 3 and top connection 1, lower contact 8 counter-rotating occurs and moves back when detaining phenomenon, last lock ring 2, following lock ring 8 the button sign occurs going up with central tube 3, and last lock ring 2, the stub end of following lock ring 8 all hangs over, in the step of lower contact, limited last lock ring 2, moving axially of following lock ring 8, and then can stop top connection 1, the non-taper thread of lower contact 7 and central tube 3 moves back button, has stopped to keep a grip on the phenomenon that comes off.
More than exemplifying only is to illustrate of the present invention, does not constitute the restriction to protection scope of the present invention, and the every and same or analogous design of the present invention all belongs within protection scope of the present invention.
Claims (2)
1. packer central tube anti-back padlock is decided mechanism, it is characterized in that: comprise last lock ring (2) for the top connection (1) that connects packer and the upper end of the central tube (3) of packer, for the following lock ring (8) of the lower contact (7) of the lower end that connects this central tube (3) and packer and be arranged on non-taper thread on the external surface of top connection (1), the inner surface of lower contact (7), the upper end that is arranged on central tube (3), lower end, the upper and lower end of central tube (3) passes through this non-taper thread and connects with this top connection (1), lower contact (7) respectively;
The little head end that last lock ring (2) and following lock ring (8) include the stub end in the circumferential step of block in top connection (1), lower contact (7) and connect with the inner chamber of central tube (3) by left-handed non-taper thread;
The little head end of last lock ring (2) connects with the upper end inner chamber of central tube (3) by left-handed non-taper thread; The little head end of following lock ring (8) connects with the lower end inner chamber of central tube (3) by left-handed non-taper thread.
2. one kind contains the packer that central tube anti-back padlock is decided mechanism, comprise central tube (3), the top connection (1), the lower contact (7) that connect with the upper and lower end of central tube (3) respectively, it is characterized in that: central tube (3) connects respectively at top connection (1), lower contact (7) by non-taper thread, and top connection (1) inner chamber connects with central tube (3) upper end inner chamber by last lock ring (2), and lock ring (8) connected with central tube (3) lower end inner chamber under lower contact (7) inner chamber passed through;
The upper end block of last lock ring (2) is on the circumferential step of top connection (1) inner chamber, and the lower end of last lock ring (2) connects with the upper end of central tube (3) by left-handed non-taper thread, and the upper end external diameter of last lock ring (2) is greater than the lower end external diameter of last lock ring (2);
The lower end block of following lock ring (8) is on the circumferential step of lower contact (7) inner chamber, and the upper end of following lock ring (8) connects with the lower end of central tube (3) by left-handed non-taper thread, and the upper end external diameter of following lock ring (8) is less than the lower end external diameter of following lock ring (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310243688.1A CN103291240B (en) | 2013-06-19 | 2013-06-19 | Packer central tube anti-back button locking mechanism and the packer containing this locking mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310243688.1A CN103291240B (en) | 2013-06-19 | 2013-06-19 | Packer central tube anti-back button locking mechanism and the packer containing this locking mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103291240A true CN103291240A (en) | 2013-09-11 |
| CN103291240B CN103291240B (en) | 2016-03-16 |
Family
ID=49092703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310243688.1A Expired - Fee Related CN103291240B (en) | 2013-06-19 | 2013-06-19 | Packer central tube anti-back button locking mechanism and the packer containing this locking mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103291240B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2133327C1 (en) * | 1997-03-24 | 1999-07-20 | Научно-исследовательский и проектный институт "Севернипигаз" РАО "Газпром" предприятие "Севергазпром" | Interval packer |
| CN2695621Y (en) * | 2004-04-21 | 2005-04-27 | 中国石化胜利油田有限公司采油工艺研究院 | Jump ring lead sealing packer |
| CN201330579Y (en) * | 2009-01-15 | 2009-10-21 | 孔宪春 | Mechanical type bridging plug |
| CN201460806U (en) * | 2009-08-19 | 2010-05-12 | 孔宪春 | Mechanical bridge plug |
| CN101852070A (en) * | 2010-05-18 | 2010-10-06 | 何富全 | Pressure balancing inclined plane locking-type gradually deblocking packer |
| CN101942981A (en) * | 2010-10-23 | 2011-01-12 | 荆州市赛瑞能源技术有限公司 | Open hole packer with double rubber drums |
| CN202611655U (en) * | 2012-06-21 | 2012-12-19 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Ball-passing type control starting packer |
-
2013
- 2013-06-19 CN CN201310243688.1A patent/CN103291240B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2133327C1 (en) * | 1997-03-24 | 1999-07-20 | Научно-исследовательский и проектный институт "Севернипигаз" РАО "Газпром" предприятие "Севергазпром" | Interval packer |
| CN2695621Y (en) * | 2004-04-21 | 2005-04-27 | 中国石化胜利油田有限公司采油工艺研究院 | Jump ring lead sealing packer |
| CN201330579Y (en) * | 2009-01-15 | 2009-10-21 | 孔宪春 | Mechanical type bridging plug |
| CN201460806U (en) * | 2009-08-19 | 2010-05-12 | 孔宪春 | Mechanical bridge plug |
| CN101852070A (en) * | 2010-05-18 | 2010-10-06 | 何富全 | Pressure balancing inclined plane locking-type gradually deblocking packer |
| CN101942981A (en) * | 2010-10-23 | 2011-01-12 | 荆州市赛瑞能源技术有限公司 | Open hole packer with double rubber drums |
| CN202611655U (en) * | 2012-06-21 | 2012-12-19 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Ball-passing type control starting packer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103291240B (en) | 2016-03-16 |
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Granted publication date: 20160316 Termination date: 20170619 |