CN201037393Y - Small-diameter expanding type squeeze packer - Google Patents
Small-diameter expanding type squeeze packer Download PDFInfo
- Publication number
- CN201037393Y CN201037393Y CNU2007200901412U CN200720090141U CN201037393Y CN 201037393 Y CN201037393 Y CN 201037393Y CN U2007200901412 U CNU2007200901412 U CN U2007200901412U CN 200720090141 U CN200720090141 U CN 200720090141U CN 201037393 Y CN201037393 Y CN 201037393Y
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- CN
- China
- Prior art keywords
- piston
- diameter expanding
- steel bushing
- central tube
- minor diameter
- 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 - Lifetime
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Abstract
The utility model relates to a small-diameter expanding squeezing and injecting packer, comprising a center pipe, wherein, the upper end and the lower end of the center pipe are respectively connected with an upper joint and a lower joint through screws; the middle part outside the center pipe is encased in an expanding rubber tube; an upper steel sleeve and a lower steel sleeve are respectively fixed at the upper end and the lower end of the expanding rubber tube; the upper steel sleeve is connected with the upper joint through screws, while the lower steel sleeve is fixed with a piston. The utility model is characterized in that: the lower part of the piston is fixed with an up-down limiting device; the lower part of the up-down limiting device is fixed on the lower joint through pins. The utility model can prevent advanced seat sealing during downhole process, prevents a seat sealing piston from overly squeezing the expanding rubber tube and damaging the rubber tube so as to avoid difficult lifting of pipe columns, and prevents that the packer cannot pass through deformed parts of a casing pipe or a subsidy reinforced well in unsealing process.
Description
Technical field
The utility model belongs to the oilfield machinery technical field, relates to a kind of oil field expanding squeeze packer.
Technical background
After sleeve in oil field distortion, subsidy are reinforced, local casing inner diameter dwindles, form local undergauge passage aisle, casing deformation, subsidy well are when carrying out high-voltage layering injection, separate layer acid treatment hierarchical squeeze note technology, need to adopt minor diameter expanding squeeze packer, packer requires to go into the well by casing deformation, subsidizes the local undergauge section after reinforcing, and plays the layering sealing function at normal sleeve pipe, after construction finishes, also to take out by the local undergauge section of sleeve pipe smoothly.During using, original minor diameter expanding squeeze packer has following problem: 1, because the through hole of packer pressure transmission water flowing is located at central tube top, there is plastic strain after the packing element expansion work, inside retains residual water, when carrying on the packer by local sleeve shrinking diameter passage aisle, packing element inside retains residual water can't reclaim the packing element lower expansion, and packer can't pass through local sleeve shrinking diameter passage aisle.2, the anti-setting mechanism of packer, minor diameter expanding squeeze packer are gone into the well and are bumped extension in the process and set in advance easily by mistake; 3, packer does not have position-limit mechanism, and it is unrestricted to set piston stroke, occurs the unconfined extruding of packing element easily, and the packing element excessive deformation can't pass through local sleeve shrinking diameter passage aisle.Above situation all influences removing smoothly of tubing string, can not satisfy the basic demand of minor diameter expanding squeeze packer " under tight, the going out of rising that go, seal ".
Summary of the invention
The purpose of this utility model overcomes above-mentioned deficiency exactly, provide a kind of prevent the packing element excessive deformation, can not premature setting, remove minor diameter expanding squeeze packer smoothly.
The technical solution adopted in the utility model is: minor diameter expanding squeeze packer, comprise central tube, central tube is bolted with upper and lower joint in two ends up and down, the outer middle side part of central tube is set with the expansion packing element, expansion packing element (5) upper and lower side is fixedly connected with upper and lower steel bushing, and last steel bushing and top connection are spirally connected, and following steel bushing is fixedly connected with piston, the piston bottom is fixedly connected with up and down stopping means, up and down the stopping means bottom by dowel fixes in lower contact.
Stopping means comprises the tubulose stop collar that is sleeved on the piston and the lower contact outside up and down, the stop collar upper end is spirally connected with piston, the interior convex edge that its bottom is provided with overlaps mutually to cooperate with the outer convex edge that the lower contact upper end is provided with and forms spacing that piston moves upward, be fixed with retaining ring on the lower contact outer wall of stop collar bottom, retaining ring forms spacing that piston moves downward.
Last steel bushing portion, be respectively equipped with the pressure transmission through hole on the central tube of steel bushing portion correspondence down.
The retaining ring top is the plane, and its underpart is outer inclined-plane.
The interior convex edge that stop collar of the present utility model bottom is provided with overlaps mutually to cooperate with the outer convex edge that the lower contact upper end is provided with and forms spacing that piston moves upward, be fixed with retaining ring on the lower contact outer wall of stop collar bottom, form spacing that piston moves downward, after piston stroke is spacing, prevented that the expansion packing element from setting unrestrictedly to expand outwardly or separate to seal up and lift the excessive deformation of stretching generation, reduce setting pressure, can be smoothly by the passage aisle section after local sleeve shrinking diameter, the subsidy; By pin stop collar is fixed, prevent that piston from moving in the process of going into the well causes packer to set midway by mistake, only after the water filling pressurization, pin is cut off, move on piston and the stop collar, the expansion packing element just can expand outwardly, and retaining ring prevents in addition that packer from going into the well to be subjected to bumping and hangs pin and cut off and the effect of premature setting; Central tube top has last pressure transmission through hole, bottom that following pressure transmission through hole is arranged, can guarantee that pressure release is reliable, even the slight plastic strain of expansion packing element, minor diameter expanding squeeze packer still can emptying inner chamber liquid, force to reclaim, smoothly by the passage aisle section after local sleeve shrinking diameter, the subsidy, deblocking is reliable, and the pressure transmission through hole is arranged on the central tube of steel bushing portion, following steel bushing portion correspondence up and down, can play the effect of filtration, impurity such as the grains of sand during filling can not enter in the expansion packing element, and influence sets and deblocking.
Description of drawings
Fig. 1 is the structural representation of minor diameter expanding squeeze packer.
The specific embodiment
As shown in Figure 1, minor diameter expanding squeeze packer comprises central tube 4, central tube is bolted with at two ends about in the of 4, lower contact 1,12, top connection 1 is provided with internal thread, lower contact 12 is provided with external screw thread, central tube 4 outer middle side parts are set with expansion packing element 5, expansion packing element 5 upper and lower sides respectively with last steel bushing 3, following steel bushing 6 sulfurations are combined into one, last steel bushing 3 is spirally connected with top connection 1, following steel bushing 6 bottoms are bolted with piston 8, piston 8 bottoms are fixedly connected with stopping means up and down, stopping means comprises the tubulose stop collar 9 that is sleeved on the piston 8 and lower contact 12 outsides up and down, stop collar 9 upper ends and piston 8 bottoms are spirally connected, convex edge 9` overlapped cooperate the formation piston to move upward spacing mutually with the outer convex edge 12` that lower contact 12 upper ends are provided with in its bottom was provided with, stop collar 9 is fixed on the outer convex edge 12` of lower contact 12 by pin 10, pin evenly is provided with 3～6 along circumference, be fixed with retaining ring 11 on lower contact 12 outer walls of stop collar 9 bottoms, retaining ring 11 forms spacing that piston moves downward, retaining ring 11 tops are the plane, its underpart is outer inclined-plane, last steel bushing 3 tops, be respectively equipped with pressure transmission through hole 2 on the central tube 4 of following steel bushing 6 bottom correspondences, 7, pressure transmission through hole 2,7 manage along circle center 4 uniform.
Minor diameter expanding squeeze packer common and restriction choke or the supporting application of injection well downhole flow regulator; tubing string is gone into the well by local sleeve shrinking diameter; passage aisle section after the subsidy; because retaining ring 11 protections; packer can premature setting; enter the desired depth of normal big sleeve pipe in the well; oil pipe builds the pressure; liquid is by the last pressure transmission through hole 2 on central tube 4 tops; the following pressure transmission through hole 6 of bottom; enter central tube 4 and expansion packing element 5 place seal chambers; behind the pressurized, expansion packing element 5 begins to expand, and pin is cut off; it is up that pulling sets piston 7; expansion packing element 5 expands and is adjacent to big sleeve pipe, realizes setting when reaching the sealing requirement of withstand voltage, at this moment; exercise its inner convex platform 9` on the stop collar 9 and snap on the lower contact 12 outer lug boss 12`, set piston 7 and no longer continue up.After the pressure release, expansion packing element 5 reclaims, and 7 times horizontal resets of piston can carry out anti-flushing well.When minor diameter expanding squeeze packer deblocking trips out, the upper lifting pipe post, because expansion packing element 5 slight plastic strain, by the passage aisle section after local sleeve shrinking diameter, the subsidy time, expansion packing element 5 is forced to push interior receipts, and the liquid in the expansion packing element 5 is discharged by the following pressure transmission through hole 6 of central tube 4 bottoms, and because the position-limiting action of retaining ring, expansion packing element 5 can not rub to form excessively and stretch, and the tubing string deblocking is smooth.
Claims (4)
1. minor diameter expanding squeeze packer, comprise central tube (4), central tube is bolted with upper and lower joint in two ends up and down, the outer middle side part of central tube is set with the expansion packing element, expansion packing element (5) upper and lower side is fixedly connected with upper and lower steel bushing, and last steel bushing and top connection are spirally connected, and following steel bushing is fixedly connected with piston, it is characterized in that: the piston bottom is fixedly connected with up and down stopping means, up and down the stopping means bottom by dowel fixes in lower contact.
2. minor diameter expanding squeeze packer according to claim 1, it is characterized in that: stopping means comprises the tubulose stop collar that is sleeved on the piston and the lower contact outside up and down, the stop collar upper end is spirally connected with piston, the interior convex edge that its bottom is provided with overlaps mutually to cooperate with the outer convex edge that the lower contact upper end is provided with and forms spacing that piston moves upward, be fixed with retaining ring on the lower contact outer wall of stop collar bottom, retaining ring forms spacing that piston moves downward.
3. minor diameter expanding squeeze packer according to claim 2 is characterized in that: upward be respectively equipped with the pressure transmission through hole on the central tube of steel bushing top, following steel bushing bottom correspondence.
4. minor diameter expanding squeeze packer according to claim 3 is characterized in that: the retaining ring top is the plane, and its underpart is outer inclined-plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200901412U CN201037393Y (en) | 2007-04-23 | 2007-04-23 | Small-diameter expanding type squeeze packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200901412U CN201037393Y (en) | 2007-04-23 | 2007-04-23 | Small-diameter expanding type squeeze packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201037393Y true CN201037393Y (en) | 2008-03-19 |
Family
ID=39209909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200901412U Expired - Lifetime CN201037393Y (en) | 2007-04-23 | 2007-04-23 | Small-diameter expanding type squeeze packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201037393Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003158A (en) * | 2010-11-20 | 2011-04-06 | 中国石油集团西部钻探工程有限公司 | Base tube expandable packer capable of secondarily expanding at time of meeting medium |
| CN107420066A (en) * | 2017-08-19 | 2017-12-01 | 大庆吉庆雨科技开发有限公司 | A kind of solvable drawing packer |
| CN107702901A (en) * | 2017-09-12 | 2018-02-16 | 中国石油天然气股份有限公司 | K344 packer deblocking capability test device and method under horizontal well repeated transformation working condition |
-
2007
- 2007-04-23 CN CNU2007200901412U patent/CN201037393Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003158A (en) * | 2010-11-20 | 2011-04-06 | 中国石油集团西部钻探工程有限公司 | Base tube expandable packer capable of secondarily expanding at time of meeting medium |
| CN102003158B (en) * | 2010-11-20 | 2014-01-08 | 中国石油集团西部钻探工程有限公司 | Base tube expandable packer capable of secondarily expanding at time of meeting medium |
| CN107420066A (en) * | 2017-08-19 | 2017-12-01 | 大庆吉庆雨科技开发有限公司 | A kind of solvable drawing packer |
| CN107702901A (en) * | 2017-09-12 | 2018-02-16 | 中国石油天然气股份有限公司 | K344 packer deblocking capability test device and method under horizontal well repeated transformation working condition |
| CN107702901B (en) * | 2017-09-12 | 2019-07-05 | 中国石油天然气股份有限公司 | K344 packer deblocking capability test method under horizontal well repeated transformation working condition |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080319 |