CN2740777Y - Layered fracturing tubular column - Google Patents
Layered fracturing tubular column Download PDFInfo
- Publication number
- CN2740777Y CN2740777Y CN 200420096775 CN200420096775U CN2740777Y CN 2740777 Y CN2740777 Y CN 2740777Y CN 200420096775 CN200420096775 CN 200420096775 CN 200420096775 U CN200420096775 U CN 200420096775U CN 2740777 Y CN2740777 Y CN 2740777Y
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- CN
- China
- Prior art keywords
- ring
- separate stratum
- packer
- stratum fracfturing
- bear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model discloses a layered fracturing tubular column used in oil industry, and the utility model is suitable for the fracturing engineering of the oil layer improvement. The utility model is connected with a fracturing hydraulic anchor, an upper and lower packer, a constant pressure ball seat and an abrasion blasting flow controller from top to bottom orderly through a fuel tube. The upper and the lower packers are arranged on the upper and lower part of one oil layer. Two packers are flushing packers totally. A layered fracturing control device is installed between the upper packer and the lower packer. Because the utility model adopts the flushing packer and the layered fracturing control device, when in construction if sand blocking occurs, the sand blocking can be removed through a backwashing well, or the utility model implements the stepped-depacking packer and removes the sand sealing by the layered fracturing control device. Therefore, the utility model solves the problem that depacking can not be conducted simultaneously by the two packers. The utility model can save operation cost largely.
Description
Technical field
The utility model relates to the formation fracturing tubing string in oilfield exploitation field, and it relates to a kind of separate stratum fracfturing tubing string or rather, is applicable to the fracturing engineering in the oil formation improvement.
Technical background
In petroleum industry, the fracturing technique in the oil formation improvement is to utilize high-pressure fluid that oil reservoir is pressed off a crack earlier, and then with the proppant pack of carrying in the load fluid among the crack, thereby form a high band that oozes, to improve the production capacity of oil well.General pressure break all is once only to press off one deck, and running into a bite oil well has two-layerly when needing pressure break, generally adopts the way of pressure break at twice.The separate stratum fracfturing technology is exactly the technology with one-stop operation pressure break multilayer, and wherein based on two-layer.The present employed packer of separate stratum fracfturing down-hole string all is a washing well not, because pressure break risk height, in case sand plug occurs, separate stratum fracfturing just the problem of sand pipe laying post occurs easily in the construction, and follow-up workover cost can rise significantly.
Summary of the invention
The purpose of this utility model provides a kind of separate stratum fracfturing tubing string, overcome above-mentioned the deficiencies in the prior art, invent a kind of can be in the separate stratum fracfturing work progress in case can remove the tubing string of sand plug by well-flushing when sand plug take place, thereby reach the raising job success ratio, reduce the purpose of operating cost.
The utility model is realized by following proposal: a kind of separate stratum fracfturing tubing string, by oil pipe be linked in sequence pressure break hydraulic anchor, two packers, level pressure ball seat and sandblast restriction chokes up and down, upper and lower packer is placed the above and below of oil reservoir one from top to bottom.Two packers all are the washing well packers, and the separate stratum fracfturing control device is installed between the upper and lower packer.
Owing to adopted washing well packer and separate stratum fracfturing control device, compared with prior art, the utlity model has following advantage:
1, when construction, in a single day runs into sand plug, can remove sand plug by anti-flushing well, if it is obstructed to run into the sand plug anti-flushing well at oil reservoir one, also can be by deblocking top packer, anti-circulation canal on the separate stratum fracfturing control device is removed sand setting gradually, so just reduce the risk of sand pipe laying post, can save operating cost greatly.
2, owing to have the flexible compensation structure in the separate stratum fracfturing control device, therefore can the substep deblocking packer, thus reduce by two of the deblockings problem of not separating envelope that packer brought simultaneously.
Description of drawings
Fig. 1 is the structural representation of the separate stratum fracfturing control device that uses in the utility model;
Fig. 2 is an A-A sectional drawing among Fig. 1;
Fig. 3 is that install down-hole of the present utility model, structural representation.
Among the figure: top connection 1, ball 2, top connection sealing ring 3, shear pin 4, lock dog 5, on bear ring 6, central tube 7, outer telescopic tube 8, hole 9, flexible in pipe 10, bear ring 11, choke valve 12, choke valve sealing ring 13, spring 14, lower contact 15, sealing ring 16, oil pipe 17, pressure break hydraulic anchor 18, upper packer 19, separate stratum fracfturing control device 20, lower packet 21, level pressure ball seat 22, sandblast restriction choke 23 down
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.As shown in Figure 3, a kind of separate stratum fracfturing tubing string, from top to bottom by oil pipe 17 be linked in sequence pressure break hydraulic anchor 18, upper packer 19, lower packet 21, level pressure ball seat 22 and sandblast sandblast sandblast restriction choke 23, upper packer 19 and lower packet 21 place the above and below of oil reservoir one, and separate stratum fracfturing control device 20 is installed between upper and lower packer 19 and 21.Separate stratum fracfturing control device 20 can be direct connection with being connected of lower packet 21, also can be directly not connect, and directly is connected to best with the two.Upper packer 19 is installed in oil reservoir more than one, lower packet 21 is installed between oil reservoir one and the oil reservoir two, the two all is the washing well packer, and wherein upper packer 19 is a kind of no support hydraulic pressure set packers, and lower packet 21 is a kind of one-way slip support hydraulic pressure set packers.
Separate stratum fracfturing control device 20 wherein is made up of telescoping mechanism, throttle mechanism, sealing mechanism and upper and lower joint 1 and 15 as shown in Figure 1.Wherein, outer telescopic tube 8, flexible in pipe 10, on bear ring 6, bear ring 11 down and lock dog 5 is formed telescoping mechanisms; Choke valve 12, sealing ring 13 and spring 14 are formed throttle mechanism; Ball 2, top connection sealing ring 3, shear pin 4, central tube 7 and sealing ring 16 are formed sealing mechanism.Its connected mode is: connected telescoping mechanism between top connection 1 and lower contact 15, sealing mechanism be installed on telescoping mechanism with interior and with top connection 1 and lower contact 15 each self seals, throttle mechanism is placed in beyond the telescoping mechanism, under bear the ring 11 and lower contact 15 between.
Connected mode with regard to separate stratum fracfturing control device 20 each mechanisms is described in further detail below, referring to Fig. 1 and Fig. 2, telescoping mechanism connects in the following manner: outer telescopic tube 8 lower ends with under bear ring and 11 link to each other, in flexible pipe 10 upper ends with on bear ring 6 and link to each other, back two-piece-dress is in preceding two, on bear ring and 6 be placed in the outer telescopic tube 8, bear down ring 11 be placed in flexible in beyond the pipe 10; On bear ring 6 external diameter greater than the internal diameter that bears ring 11 down; Lock dog 5 is installed in and bears on the ring 6, and the inwall of lock dog 5 leans against on the outer wall of central tube 7, and outer wall has a cross section to be trapezoidal projection to be embedded in the corresponding groove of outer telescopic tube 8 inwalls, bears ring 6 and with outer telescopic tube 8 relative displacement can not take place thereby make; Bearing down on ring 11 the inner surface has two symmetrical projectioies, the corresponding with it axial notch in two roads is arranged on the external surface of pipe 10 in flexible, and projection embeds in the groove and can endwisely slip along groove.Outer telescopic tube 8 upper ends link to each other with top connection 1, and flexible interior pipe 10 lower ends link to each other with lower contact 15.Throttle mechanism connects in the following manner: throttle mechanism is enclosed within outside the flexible interior pipe 10; Spring 14 lower ends are pressed in lower contact 15 upper ends, and the upper end withstands on choke valve 12 lower ends; The top of choke valve 12 is an outer cone, cooperates with the internal conical surface that bears ring 11 lower ends down, plays throttling action under the compressing of spring 14; Between the pipe 10 sealing ring 13 is installed at choke valve 12 and in stretching.Sealing mechanism connects in the following manner: shear pin 4 one ends are installed in and bear on the ring 6, and the other end stretches in the annular groove of central tube 7 external surfaces central tube 7 location; Between top connection 1 and central tube 7, install joint sealing circle 3, sealing ring 16 is installed between lower contact 15 and central tube 7; Ball 2 matches with the internal conical surface of central tube 7 upper ends and plays sealing function, and ball 2 drops in oil pipe in operation process.
Be mode of occupation of the present utility model below:
With separate stratum fracfturing tubing string G.I.H of the present utility model, drop into level pressure ball seat steel ball according to the tubular column structure of Fig. 3 then in oil pipe 17, this ball drops on the level pressure ball seat 22.In oil pipe 17, beat hydraulic setting upper packer 19 and lower packet 21, boost then and destroy the fuse of level pressure ball seat 22.Begin oil reservoir two pressing crack constructions, fracturing fluid and proppant enter oil reservoir two by sandblast restriction choke 23.
After oil reservoir two pressure breaks are finished, drop into ball 2 in oil pipe 17, ball 2 drops on the upper end and the sealing with it of the central tube 7 of separate stratum fracfturing control device 20, beats hydraulic pressure and cut off to shear pin 4 in oil pipe 17, and central tube 7 is descending, and expose in the hole 9 on the central tube 7.Begin oil reservoir one pressing crack construction, fracturing fluid and proppant are through via hole 9, and be descending along the annular space that stretches interior pipe 10 and outer telescopic tube 8 and bear between the ring 11 down, pushes choke valve 12 open and enter oil reservoir one.Shear pin 4 is cut off, after central tube 7 was descending, lock dog 5 had just lost interior constraint, can move to the center, during separate stratum fracfturing control device 20 tensions, shift out from the inside groove of outer telescopic tube 8 outer end of its trapezoid cross section, at this moment, on bear ring 6 and relative displacements take place with outer telescopic tube 8, telescoping mechanism plays a role, separate stratum fracfturing control device 20 is elongated, its retractable thereafter, and this has three effects:
The one, deblocking upper packer 19 and lower packet 21 reduce the deblocking difficulty step by step.
The 2nd, after separate stratum fracfturing control device 20 drew back, oil jacket was communicated with, and can wash out the proppant of lower packet more than 21 by well-flushing.
The 3rd, can up and down tubing string make proppant loose and progressively remove sand plug.
Owing to adopted two washing well packers, in a single day in the construction sand plug appears, can at first remove sand plug by anti-flushing well, if unsuccessful, also can solve by following step.
1, if sand plug occurs in oil reservoir two constructions, the upper and lower packer 19 of deblocking and 21 trips out tubing string step by step.
2, if sand plug occurs in oil reservoir one construction, can first deblocking upper packer 19, remove sand plug by separate stratum fracfturing control device 20 well-flushings.The deblocking lower packet 21 again, trip out tubing string.
Level pressure ball seat 22 of the present utility model can unite two into one with sandblast restriction choke 23, is made of one.Other link can be removed or use instead to lower contact 15 also.The lower end screw thread of pipe 10 directly links to each other with lower packet 21 in flexible, and sealing ring 16 is installed between the endoporus of central tube 7 and lower packet 21.
Claims (7)
1, a kind of separate stratum fracfturing tubing string, from top to bottom by oil pipe (17) be linked in sequence pressure break hydraulic anchor (18), upper packer (19), lower packet (21), level pressure ball seat (22) and sandblast restriction choke (23), upper packer (19) and lower packet (21) place the above and below of oil reservoir one, it is characterized in that: upper packer (19) and lower packet (21) all are the washing well packers, and separate stratum fracfturing control device (20) is installed between upper packer (19) and the lower packet (21).
2. a kind of separate stratum fracfturing tubing string according to claim 1, the upper packer (19) that it is characterized in that oil reservoir one top is no support hydraulic pressure set packer, the lower packet (21) of oil reservoir one below is an one-way slip support hydraulic pressure set packer.
3. a kind of separate stratum fracfturing tubing string according to claim 1 is characterized in that the separate stratum fracfturing control device (20) and the best connected mode of lower packet (21) are directly to link together.
4, a kind of separate stratum fracfturing tubing string according to claim 1, it is characterized in that separate stratum fracfturing control device (20) is made up of telescoping mechanism, throttle mechanism, sealing mechanism, top connection (1) and lower contact (15), between top connection (1) and lower contact (15), connected telescoping mechanism, sealing mechanism be installed on telescoping mechanism with interior and with top connection (1) and each self seals of lower contact (15), throttle mechanism is placed in beyond the telescoping mechanism, bears under being positioned between ring (11) and the lower contact (15).
5. a kind of separate stratum fracfturing tubing string according to claim 4, it is characterized in that telescoping mechanism by outer telescopic tube (8), flexible in pipe (10), on bear ring (6), bear ring (11) down and lock dog (5) is formed, outer telescopic tube (8) lower end with under bear ring (11) and link to each other, in flexible pipe (10) upper end with on bear ring (6) and link to each other, on bear ring (6) and be placed in the outer telescopic tube (8), bear ring (11) down and be placed in and manage (10) in addition in flexible; On bear the external diameter of ring (6) greater than the internal diameter that bears ring (11) down; Lock dog (5) is installed in and bears on the ring (6), and its inwall leans against on the outer wall of central tube (7), and outer wall has a cross section to be trapezoidal projection to be embedded in the corresponding groove of outer telescopic tube (8) inwall; Bearing down on the inner surface of ring (11) has two symmetrical axial projection, the corresponding with it axial notch in two roads is arranged on the external surface of pipe (10) in flexible, and projection embeds in the groove and can endwisely slip along groove.
6. a kind of separate stratum fracfturing tubing string according to claim 4, it is characterized in that throttle mechanism is made up of choke valve (12), sealing ring (13) and spring (14), spring (14) is installed on below the choke valve (12), the top of choke valve (12) is an outer cone, cooperates with the internal conical surface that bears ring (11) lower end down.
7. a kind of separate stratum fracfturing tubing string according to claim 4, it is characterized in that sealing mechanism is made up of ball (2), sealing ring (3), shear pin (4), central tube (7) and sealing ring (16), shear pin (4) one ends are installed in and bear on the ring (6), and the other end stretches in the annular groove of central tube (7) external surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420096775 CN2740777Y (en) | 2004-09-30 | 2004-09-30 | Layered fracturing tubular column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420096775 CN2740777Y (en) | 2004-09-30 | 2004-09-30 | Layered fracturing tubular column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2740777Y true CN2740777Y (en) | 2005-11-16 |
Family
ID=35351068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420096775 Expired - Fee Related CN2740777Y (en) | 2004-09-30 | 2004-09-30 | Layered fracturing tubular column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2740777Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926704A (en) * | 2012-12-03 | 2013-02-13 | 中国石油集团川庆钻探工程有限公司井下作业公司 | Pressure-balancing one-way valve for coiled-tubing layering fracturing |
| CN101638982B (en) * | 2009-08-20 | 2013-06-19 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Multi-formation fracturing device and process of release tubular column |
| CN110359894A (en) * | 2019-06-26 | 2019-10-22 | 天地科技股份有限公司 | A kind of hydraulic fracturing pressure releasing method and device |
-
2004
- 2004-09-30 CN CN 200420096775 patent/CN2740777Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101638982B (en) * | 2009-08-20 | 2013-06-19 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Multi-formation fracturing device and process of release tubular column |
| CN102926704A (en) * | 2012-12-03 | 2013-02-13 | 中国石油集团川庆钻探工程有限公司井下作业公司 | Pressure-balancing one-way valve for coiled-tubing layering fracturing |
| CN102926704B (en) * | 2012-12-03 | 2015-05-27 | 中国石油集团川庆钻探工程有限公司井下作业公司 | Pressure-balancing one-way valve for coiled-tubing layering fracturing |
| CN110359894A (en) * | 2019-06-26 | 2019-10-22 | 天地科技股份有限公司 | A kind of hydraulic fracturing pressure releasing method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051116 Termination date: 20091030 |