CN203716920U - Multifunctional packer with capacity of low-pressure repeated setting after first high-pressure setting - Google Patents
Multifunctional packer with capacity of low-pressure repeated setting after first high-pressure setting Download PDFInfo
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- CN203716920U CN203716920U CN201420080759.0U CN201420080759U CN203716920U CN 203716920 U CN203716920 U CN 203716920U CN 201420080759 U CN201420080759 U CN 201420080759U CN 203716920 U CN203716920 U CN 203716920U
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Abstract
The utility model relates to a multifunctional packer with capacity of low-pressure repeated setting after first high-pressure setting. The multifunctional packer is formed through threaded connection of an upper joint, a center pipe and a lower joint. According to the multifunctional packer, with the adoption of scheme that low-pressure repeated setting can be performed in the first high-pressure setting and normal working process, the expandable packer can be matched with a hydraulic clip tubular column anchoring tool and an insertion tube connector, the damage to a lower packer rubber sleeve by moving of an upper tubular column when pressure and temperature fluctuate can be fundamentally eliminated, and multiple functions such as bumping prevention, midway setting prevention, low-pressure repeated setting after first high-pressure setting, pressure relief setting of an oil tube, large-channel well washing, prolonging of effective sealing section, pull release and the like can be realized; the packer can effectively pack a casing deformation well, a casing corrosion well, a casing damage well, a barefoot well and particularly the ultra-deep barefoot well sections of a carbonate reservoir and can implement potential tapping measures of separated layer water injection, finding of water plugging, acid fracturing, gas injection, dilution and the like in the oilfield development process.
Description
Technical field
Multifunction packer that can low pressure restting after the utility model relates to a kind of high pressure first and sets, belongs to the downhole tool technical field in oilfield development process.
Background technology
For to casing deformation well, casing corrosion well, casing damage well and open hole well, particularly to carrying out effective packing between the super dark open hole well interval of Carbonate Reservoir, enforcement looks for water blockoff, acid fracturing, seperated layer water injection, gas injection to mix the well stimulations such as rare, requires packer to have following functions:
(1), can avoid occurring the phenomenon set, the safety of going into the well midway;
, can support the use with tubing string anchor tool, intubate connector, overcome the damage of ultradeep well string creep phenomenon to packing element;
, packing element effective sealing segment length, can carry out effective sealing to exceptional well section;
(4), packer deblocking not after oil pipe release;
(5), can meet the requirement of major path well-flushing;
(6), can meet the requirement of restting;
(7), can meet the requirement that safe deblocking trips out tubing string.
The packing element of conventional compression packer is short, well-flushing passage is little, and as Y341 packer, Y241 packer, the borehole wall of cannot tightly fitting in casing deformation well, casing corrosion well, casing damage well and open hole well is realized sealing, also cannot meet the requirement of major path well-flushing.
Self-expandable packer mainly contains meets that oil expands and two types of water-swellables, such packer can automatic expansion, construction technology is simple, because its expansion rate is high, thereby can realize gapless squash type and fill packing, be applicable to irregular borehole and open hole well, but this packer belong to permanent envelope every, tubing string cannot normally trip out, and brings hidden danger to the envelope of changing subsequently.
Conventional K344 inflatable packer, mainly by top connection, central tube, packing element and lower contact, formed, operating principle is to utilize the effect of packing element inside and outside differential pressure to realize to set, have advantages of that the pressure of setting is low, sealing segment length, well-flushing passage are large, can restting, weak point one is low owing to setting pressure, the phenomenon that easily occurring goes into the well sets midway; The 2nd, in ultradeep well when the startup operating pressure of tubing string anchor tool be greater than K344 set pressure time, K344 packer has just set before tubing string grappling, string creep easily damages packing element, well is darker, temperature difference pressure reduction is larger, damages more obvious; The 3rd, when tubing pressure is pressed in lower than packing element, packing element release deblocking, can not realize stabilized seal.
Once there is technician that one way valve is installed in the water inlet of K44 packing element, and can realize tubing pressure deblocking not when pressing in packing element, but also just because of the effect of one way valve, can not realize restting, also sacrificed the major path well-flushing function of K341.
Summary of the invention
The purpose of this utility model is, Multifunction packer that can low pressure restting after providing a kind of high pressure first to set, this Multifunction packer adopts high pressure to set mode when setting first, in course of normal operation, adopting can low pressure restting mode, guarantee that phenomenon does not appear setting midway in inflatable packer in the process of going into the well, also can guarantee inflatable packer and hydraulic slip class tubing string anchor tool, when intubate connector supports the use, after in the grappling of hydraulic slip class tubing string anchor tool, set, fundamentally eliminate and work as water injection pressure, the harm that during temperature fluctuation, top string creep causes lower packer packing element, and when normal water filling, during construction, packing element remains that under the effect that sets piston and spring expansion sets state, when well-flushing, packing element can release reclaim deblocking under the effect of well-flushing piston, carries out major path well-flushing, when recovering normal water filling, construction, packing element is under low pressure restting work again.
The utility model is to realize by the following technical solutions above-mentioned purpose:
Multifunction packer that can low pressure restting after a kind of high pressure first sets, it by top connection, anti-collision link, deblocking pin, upper connector, central tube, filter screen connector, well-flushing piston, lower connector, set piston, spring, set pin first, set sliding sleeve, packing element metallic pipe coupling, cartridge assembly, movable head and lower contact first and form, top connection, central tube and lower contact are threaded connection from top to bottom successively, form the carrying main body of instrument; The outside of top connection is set with connector, between top connection and upper connector, by deblocking pin, be connected and fixed, the bottom of upper connector is socketed with filter screen connector, lower connector, packing element metallic pipe coupling, cartridge assembly and movable head successively by screw thread, anti-collision link is installed in the upper end of top connection by screw thread, it is characterized in that:
The inwall of the outer wall of described central tube and lower connector forms an annular housing, on the inwall of lower connector, be manufactured with seal receptacle, seal receptacle is separated into upper and lower two parts by annular housing, upper part is in-built well-flushing piston, in lower part, be equipped with successively from top to bottom and set piston, spring and set first sliding sleeve, spring is placed in the annular housing that sets first sliding sleeve and central tube formation, set first sliding sleeve and lower connector by setting first pin location and installation, well-flushing piston and set on the central tube between piston and be manufactured with water inlet.
Special-shaped seal components, O RunddichtringO are equipped with in described setting on piston, set first on sliding sleeve O RunddichtringO is housed, and O RunddichtringO is housed on well-flushing piston, and the lower end system of well-flushing piston is ashamed well-flushing nib key.
This Multifunction packer that high pressure can low pressure restting after setting first adopts high pressure to set when setting first, in course of normal operation, adopts low pressure to set during restting.
The utility model beneficial effect is compared with prior art:
The utility model can realize high pressure first set in rear course of normal operation can low pressure restting function, thereby can guarantee that phenomenon does not appear setting midway in inflatable packer in the process of going into the well, also in the time of can guaranteeing that inflatable packer and hydraulic slip class tubing string anchor tool, intubate connector support the use, after in the grappling of hydraulic slip class tubing string anchor tool, set, fundamentally eliminate the harm that top string creep causes lower packer packing element when water injection pressure, temperature fluctuation.And, by when increase sets piston, increase well-flushing piston, changed the pressure distribution of conventional inflatable packer, make inflatable packer be greater than normal water filling, when construction of casing pressure at tubing pressure, packing element remains that under the effect that sets piston and spring expansion sets state; When casing pressure is greater than tubing pressure and is well-flushing, packing element can release reclaim deblocking under the effect of well-flushing piston, carries out major path well-flushing; When recovering tubing pressure and be greater than casing pressure and be normal water filling, construction, packing element is restting under low pressure again, has inherited the plurality of advantages of K44 packer.Simultaneously, this special pressure distribution mode, the situation lower packet that has larger pressure reduction in the time of can guaranteeing normal water filling between packer levels is deblocking not, avoids occurring that Y341, Y241 class well packer capable of flushing well well-flushing passage in the situation that there is larger pressure reduction between levels opens so that the phenomenon of inter-zone commununation.The utility model is applicable to effective packing of casing deformation well, casing corrosion well, casing damage well and open hole well, particularly to carrying out effective packing between the super dark open hole well interval of Carbonate Reservoir, implement seperated layer water injection, look for water blockoff, acid fracturing, gas injection to mix the measure of taping the latent power in the oilfield development process such as rare.
Accompanying drawing explanation
Fig. 1 is the structural representation of Multifunction packer that can low pressure restting after a kind of high pressure first sets;
Fig. 2 is the upper part-structure schematic diagram of Multifunction packer that can low pressure restting after a kind of high pressure first sets;
Fig. 3 is the lower part-structure schematic diagram of Multifunction packer that can low pressure restting after a kind of high pressure first sets.
In figure: 1, top connection, 1-1, limited step, 2, anti-collision link, 3, deblocking pin, 4, upper connector, 4-1, limited step, 5, central tube, 5-1, water inlet, 5-2, reducing release step, 6, filter screen connector, 6-1, well-flushing water inlet, 7, well-flushing piston, 7-1, O RunddichtringO, 7-2, well-flushing nib key, 8, lower connector, 8-1, seal receptacle, 9, set piston, 9-1, Special-shaped seal components, 9-2, O RunddichtringO, 10, spring, 11, set first pin, 12, set first sliding sleeve, 12-1, O RunddichtringO, 13, packing element metallic pipe coupling, 13-1, O RunddichtringO, 14, cartridge assembly, 14-1, upper metal joint, 14-2, packing element, 14-3, steel band, 14-4, lower metal joint, 15, movable head, 15-1, O RunddichtringO, 16, lower contact.
The specific embodiment
Below in conjunction with accompanying drawing, this Multifunction packer that high pressure can low pressure restting after setting being first specifically described as follows, is example for water injection well.
This Multifunction packer that high pressure can low pressure restting after setting is first by top connection 1, limited step 1-1, anti-collision link 2, deblocking pin 3, upper connector 4, limited step 4-1, central tube 5, water inlet 5-1, reducing release step 5-2, filter screen connector 6, well-flushing water inlet 6-1, well-flushing piston 7, sealing ring 7-1, well-flushing nib key 7-2, lower connector 8, seal receptacle 8-1, set piston 9, Special-shaped seal components 9-1, sealing ring 9-2, spring 10, set first pin 11, set first sliding sleeve 12, sealing ring 12-1, packing element metallic pipe coupling 13, sealing ring 13-1, cartridge assembly 14, upper metal joint 14-1, packing element 14-2, steel band 14-3, lower metal joint 14-4, movable head 15, sealing ring 15-1, lower contact 16 forms.Top connection 1, central tube 5 and lower contact 16 are threaded connection from top to bottom successively, form the carrying main body of instrument; The outside of top connection 1 is set with connector 4, between top connection 1 and upper connector 4, by deblocking pin 3, be connected and fixed, the bottom of upper connector 4 is socketed with filter screen connector 6, lower connector 8, packing element metallic pipe coupling 13, cartridge assembly 14 and movable head 15 successively by screw thread, and anti-collision link 2 is installed in the upper end of top connection 1 by screw thread.
The outer wall of described central tube 5 and the inwall of lower connector 8 form an annular housing, on the inwall of lower connector 8, be manufactured with seal receptacle 8-1, seal receptacle 8-1 is separated into upper and lower two parts by annular housing, upper part is in-built well-flushing piston 7, in lower part, be equipped with successively from top to bottom and set piston 9, spring 10 and set first sliding sleeve 12, spring 10 is placed in the annular housing that sets first sliding sleeve 12 and central tube 5 formations, set first sliding sleeve 12 and lower connector 8 by setting first pin 11 location and installation, well-flushing piston 7 and set on the central tube 5 between piston 9 and be manufactured with water inlet 5-1.Described setting is equipped with Special-shaped seal components 9-1, O RunddichtringO 9-2 on piston 9, set first O RunddichtringO 12-1 is housed on sliding sleeve 12, O RunddichtringO 7-1 is housed on well-flushing piston 7, and the lower end system of well-flushing piston 7 is ashamed has well-flushing nib key 7-2(referring to accompanying drawing 1～3).
The course of work of this Multifunction packer that high pressure can low pressure restting after setting is first as follows:
When instrument is gone into the well, top anti-collision link 2 and lower contact 16 can effectively prevent from touching the wound injury that extension causes packing element.
Under instrument when setting first after interval of interest, in oil pipe, suppress, the water inlet 5-1 of water under high pressure from central tube 5 enters in the cavity of central tube 5 and lower connector 8 formations, upwards promote that well-flushing piston 7 is up to be hampered, to next, promote to set piston 9 and set first sliding sleeve 12 descending, cut off and set first pin 11, simultaneously Compress Spring 10, water under high pressure enters in packing element subsequently, and packing element expansion sets; When oil pipe internal pressure declines, oil pressure is less than in packing element and presses, and under the effect of spring 10, sets the up seal receptacle 8-1 that is sitting in of piston 9 and goes up, and due to the sealing function of Special-shaped seal components 9-1, packing element is deblocking not; When well-flushing, casing pressure is greater than oil pressure, water under high pressure enters in the toroidal cavity of filter screen connector 6 and central tube 5 formations from well-flushing water inlet 6-1, promote well-flushing piston 7 and move down, under the impetus of well-flushing nib key 7-2, Special-shaped seal components 9-1 moves down disengaging seal receptacle 8-1 with setting piston 9, water under high pressure in packing element is let out oil pipe from water inlet 5-1, packing element shrinks deblocking, and oil sets annular space passage is opened, and can carry out major path high flow rate washover; When recovering tubing pressure and be greater than casing pressure and be normal water filling, the water inlet 5-1 of water under high pressure from central tube 5 enters in the cavity of central tube 5 and lower connector 8 formations, it is descending that promotion sets piston 9, Compress Spring 10, water under high pressure enters in packing element subsequently, packing element is again expanded and is set, differently when setting be first, need not overcome again the shearing force of deblocking pin, so, set first pressure higher than the pressure of restting, when setting first, adopt high pressure to set, in course of normal operation, adopt low pressure to set during restting; And according to actual needs, can design the size that sets first pressure, well-flushing pressure and restting pressure.
During deblocking, upper lifting pipe post, under the effect that sets packing element, top connection 1 drives central tube 5 to move up with respect to upper connector 4, cut off deblocking pin 3, until together with limited step 1-1 snaps into limited step 4-1, simultaneously, movable head 15 also moves down with upper connector 4, until the bottom of reducing release step 5-2, due to little than its top of the external diameter of reducing release step 5-2 lower central pipe, the O RunddichtringO 15-1 being at this moment placed on movable head 15 has just lost sealing function, packing element release deblocking.
The above is preferred embodiment of the present utility model, above-mentioned not illustrating done any pro forma restriction to flesh and blood of the present utility model, any simple modification or distortion that person of an ordinary skill in the technical field has done the above specific embodiment according to technical spirit of the present utility model after having read this manual, and the technology contents that may utilize above-mentioned announcement is changed or is modified to the equivalent embodiment of equivalent variations, all still belong in the scope of technical solutions of the utility model, and do not deviate from essence of the present utility model and scope.
Claims (3)
1. the Multifunction packer that high pressure can low pressure restting after setting first, it is by top connection (1), anti-collision link (2), deblocking pin (3), upper connector (4), central tube (5), filter screen connector (6), well-flushing piston (7), lower connector (8), set piston (9), spring (10), set first pin (11), set first sliding sleeve (12), packing element metallic pipe coupling (13), cartridge assembly (14), movable head (15) and lower contact (16) form, top connection (1), central tube (5) and lower contact (16) are threaded connection from top to bottom successively, the carrying main body of formation instrument, the outside of top connection (1) is set with connector (4), between top connection (1) and upper connector (4), by deblocking pin (3), be connected and fixed, the bottom of upper connector (4) is socketed with filter screen connector (6), lower connector (8), packing element metallic pipe coupling (13), cartridge assembly (14) and movable head (15) successively by screw thread, anti-collision link (2) is installed in the upper end of top connection (1) by screw thread, it is characterized in that:
The inwall of the outer wall of described central tube (5) and lower connector (8) forms an annular housing, on the inwall of lower connector (8), be manufactured with seal receptacle (8-1), seal receptacle (8-1) is separated into upper and lower two parts by annular housing, upper part is in-built well-flushing piston (7), in lower part, be equipped with successively from top to bottom and set piston (9), spring (10) and set first sliding sleeve (12), spring (10) is placed in the annular housing that sets first sliding sleeve (12) and central tube (5) formation, set first sliding sleeve (12) and lower connector (8) by setting first pin (11) location and installation, well-flushing piston (7) and set on the central tube (5) between piston (9) and be manufactured with water inlet (5-1).
2. the Multifunction packer that a kind of high pressure first according to claim 1 can low pressure restting after setting, it is characterized in that: described setting is equipped with Special-shaped seal components (9-1), O RunddichtringO (9-2) on piston (9), set first O RunddichtringO (12-1) is housed on sliding sleeve (12), O RunddichtringO (7-1) is housed on well-flushing piston (7), and the lower end of well-flushing piston (7) is manufactured with well-flushing nib key (7-2).
3. the Multifunction packer that a kind of high pressure first according to claim 1 can low pressure restting after setting, is characterized in that: when setting first, adopt high pressure to set, in course of normal operation, adopt low pressure to set during restting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420080759.0U CN203716920U (en) | 2014-02-25 | 2014-02-25 | Multifunctional packer with capacity of low-pressure repeated setting after first high-pressure setting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420080759.0U CN203716920U (en) | 2014-02-25 | 2014-02-25 | Multifunctional packer with capacity of low-pressure repeated setting after first high-pressure setting |
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| Publication Number | Publication Date |
|---|---|
| CN203716920U true CN203716920U (en) | 2014-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420080759.0U Withdrawn - After Issue CN203716920U (en) | 2014-02-25 | 2014-02-25 | Multifunctional packer with capacity of low-pressure repeated setting after first high-pressure setting |
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| CN (1) | CN203716920U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775022A (en) * | 2014-02-25 | 2014-05-07 | 荆州市翔龙石油科技有限公司 | Multifunctional packer capable of resealing under lower pressure after sealing under high pressure for the first time |
| CN108680314A (en) * | 2018-05-10 | 2018-10-19 | 安徽理工大学 | A kind of sliding sleeve of bushing thermal modeling test device |
| CN116556878A (en) * | 2023-05-24 | 2023-08-08 | 东营市福利德石油科技开发有限责任公司 | Packer capable of being set and unset repeatedly |
-
2014
- 2014-02-25 CN CN201420080759.0U patent/CN203716920U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775022A (en) * | 2014-02-25 | 2014-05-07 | 荆州市翔龙石油科技有限公司 | Multifunctional packer capable of resealing under lower pressure after sealing under high pressure for the first time |
| CN103775022B (en) * | 2014-02-25 | 2015-12-16 | 荆州市翔龙石油科技有限公司 | Can the Multifunction packer of low pressure restting after a kind of high pressure first sets |
| CN108680314A (en) * | 2018-05-10 | 2018-10-19 | 安徽理工大学 | A kind of sliding sleeve of bushing thermal modeling test device |
| CN116556878A (en) * | 2023-05-24 | 2023-08-08 | 东营市福利德石油科技开发有限责任公司 | Packer capable of being set and unset repeatedly |
| CN116556878B (en) * | 2023-05-24 | 2023-12-26 | 东营市福利德石油科技开发有限责任公司 | Packer capable of being set and unset repeatedly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140716 Effective date of abandoning: 20151216 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |