CN202250018U - Underground separate-layer fracturing technical tubular column and drillable packer thereof - Google Patents
Underground separate-layer fracturing technical tubular column and drillable packer thereof Download PDFInfo
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- CN202250018U CN202250018U CN 201120397045 CN201120397045U CN202250018U CN 202250018 U CN202250018 U CN 202250018U CN 201120397045 CN201120397045 CN 201120397045 CN 201120397045 U CN201120397045 U CN 201120397045U CN 202250018 U CN202250018 U CN 202250018U
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- central tube
- tapered sleeve
- packer
- slips
- wall
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Abstract
The utility model discloses an underground separate-layer fracturing technical tubular column and a drillable packer thereof. The drillable packer comprises a central pipe, wherein an inserting hole matched with the inserting end of a sealing inserting device in sealing way is mounted in the central pipe; a medium rubber barrel is glidingly sleeved on the external wall of the middle of the central pipe; an upper tapered sleeve and a lower cone are respectively glidingly sleeved on the external walls of the central pipes placed at two ends of the medium rubber barrel; an upper tapered sleeve and a lower tapered sleeve are respectively provided with annular tapered faces, wherein the annual tapered faces are gradually reduced from oppositely closed bases to related end; the upper tapered sleeve and the lower tapered sleeve are respectively glidingly sleeved with upper and lower slips through the annular tapered face thereon; the upper and lower cones and the relatively sleeved upper and lower slips are mounted at two ends of the central pipe, respectively; and a baffling ring matched with the bottom of the lower slip in blocking way is fixedly sleeved on the external wall of the lower end of the central pipe. The underground separate-layer fracturing technical tubular column disclosed by the utility model has simple structure and low manufacturing cost, and is capable of ensuring the drillable packer to be completely drilled by a flat grind shoe, as well as solving the effects of existing technique.
Description
Technical field
The utility model belongs to mining Technology Underground field, oil field, and definite saying so relates to the drillable packer that uses on a kind of laminated distributor under well fracturing technology tubing string and this tubing string.
Background technology
For the low porosity and low permeability heterogeneous reservoir, pressure break is one of major measure means that improve oil well output, and for the multi-section multi-layer heterogeneous reservoir, a plurality of intervals of one-trip string pressure break are to improve pressure break timeliness and the important means that reduces the pressure break cost.Present domestic separate stratum fracfturing tubing string has hydraulic anchor+Y111 packer+sliding sleeve sandblaster+hydraulic anchor+Y221 packer, hydraulic anchor+Y241 packer+sliding sleeve sandblaster+hydraulic anchor+Y241 packer+sliding sleeve to set various separate stratum fracfturing tubing strings such as device; Analyze from these tubular column structures; It is how good no matter packers at different levels are separated sealing property; The problem that always has sand card packer; From not eliminating sand card problem in essence, still can not cause heavy repair task down-hole accident on the tubing string, so just restricting separate stratum fracfturing tubing string application scale.Chinese patent open file CN201031679Y discloses a kind of deep gas well separate stratum fracfturing tool string; This tool string be in the oil pipe lower end successively attachment security joint, abrasionproof protector, hydraulic anchor, compression packer, flow nipple, gradual footpath device, sliding sleeve sandblaster, can bore packer, insert seal section and outreach tool tube; Wherein, Can bore packer and adopt conventional Y443 type packer; During construction; Carrying the Y443 type with oil pipe earlier can bore under packer and the special-purpose setting tool to the precalculated position, down-hole; Let the Y443 type can bore packer setting and realize giving up, carry by safety joint, abrasionproof protector, hydraulic anchor, compression packer, flow nipple, gradual footpath device, sliding sleeve sandblaster, can bore packer, insert the tubing string that seal section forms and go into the well with oil pipe then, the insertion seal section is inserted into the Y443 type and can bores and carry out fracturing work in the packer.According to circumstances trip out tubing string after operation is intact, the Y443 type can be bored packer stay the down-hole.If desired oil well is carried out other operation, then need descend flat junk mill that this Y443 type can be bored the packer brill and grind off.The structure of packer is comparatively complicated, manufacturing cost and use cost is higher but the Y443 type can bore; And can bore packer in this Y443 type and also extend axially in its slips bottom and be provided with one section long being used to and insert the jack section that seal section inserts; When it can bore packer in this Y443 type of brill mill; After the slips that can bore packer when the Y443 type is ground off by brill; Be positioned at slips below the jack section can drop to the shaft bottom because losing the support of slips, very difficult to the salvaging of this part jack section of dropping, if this oil well is carried out repeatedly separate stratum fracfturing operation; The Y443 type of bottommost can bore packer and bored the jack section that drops behind the mill and accumulate over a long period and can increase gradually, thereby stopping that tubing string is gone into the well causes oil well to scrap.
The utility model content
The purpose of the utility model is: a kind of laminated distributor under well fracturing technology tubing string is provided, can't all bores the problem that grinds off with the bored packer that solves existing separate stratum fracfturing tubing string bottom.
The technical scheme of the laminated distributor under well fracturing technology tubing string of the utility model is: a kind of laminated distributor under well fracturing technology tubing string; Comprise oil pipe, high-pressure hydraulic anchor, pressure break packer, sliding sleeve sandblaster, sealing inserter and can bore packer; The described packer that bores comprises central tube; Be provided with and seal the jack that the insertion end of inserter is sealed and matched in the central tube; Packing element in the middle of slip cap is equipped with on the outer wall of the middle part of central tube; Tapered sleeve and hypocentrum on slip cap is equipped with respectively on the central tube outer wall at the two ends of packing element in the middle of be positioned at, described upper and lower tapered sleeve be respectively equipped with by relatively near base portion to the diminishing annular conical surface in the end of correspondence, on upper and lower tapered sleeve, through the annular conical surface slip cap on it upper and lower slips is housed respectively; The upper and lower slips of described upper and lower centrum and corresponding suit is divided into the two ends of central tube, on the outer wall of central tube lower end, goes back fixed cover the baffle ring that cooperates with the bottom surface block of lower slips is housed.
The shop bolt that described upper and lower tapered sleeve is provided for when setting, being cut off through correspondence respectively is fixed on the central tube outer wall, and the two ends up and down of said middle packing element are gripped by the upper and lower tapered sleeve of correspondence respectively.
On the circumferential exterior surface of said upper and lower slips, be respectively equipped with the helical teeth that is used for the internal surface of sleeve pipe interlock, the helical teeth between the upper and lower slips is towards opposing setting.
The utility model also provides a kind of packer that bores simultaneously; This technical scheme that can bore packer is: a kind of packer that bores; Comprise central tube; Be provided with and seal the jack that the insertion end of inserter is sealed and matched in the central tube, packing element in the middle of slip cap is equipped with on the outer wall of the middle part of central tube, tapered sleeve and hypocentrum on slip cap is equipped with respectively on the central tube outer wall at the two ends of packing element in the middle of being positioned at; Described upper and lower tapered sleeve be respectively equipped with by relatively near base portion to the diminishing annular conical surface in the end of correspondence; On upper and lower tapered sleeve, through the annular conical surface slip cap on it upper and lower slips is housed respectively, the upper and lower slips of described upper and lower centrum and corresponding suit is divided into the two ends of central tube, on the outer wall of central tube lower end, goes back fixed cover the baffle ring that cooperates with the bottom surface block of lower slips is housed.
The shop bolt that described upper and lower tapered sleeve is provided for when setting, being cut off through correspondence respectively is fixed on the central tube outer wall, and the two ends up and down of said middle packing element are gripped by the upper and lower tapered sleeve of correspondence respectively.
On the circumferential exterior surface of said upper and lower slips, be respectively equipped with the helical teeth that is used for the internal surface of sleeve pipe interlock, the helical teeth between the upper and lower slips is towards opposing setting.
The bored packer that adopts in the separate stratum fracfturing tubing string of the utility model simple in structure; Cheap for manufacturing cost, it will be used for setting up separately at its two ends with the last lower slips of sleeve pipe clamping, make it in boring the mill process; Lower slips can provide effective support to packer; Thereby guaranteed that this can bore packer and can have been ground by flat junk mill brill basically, brill can be cleared the packer chip out through well-flushing after grinding, thereby has overcome the defective of prior art.
Description of drawings
Fig. 1 is the structural representation sketch of laminated distributor under well fracturing technology tubing string specific embodiment in the utility model;
Fig. 2 is for boring the structural representation of packer in the utility model;
Fig. 3 is the structural representation in the time of can boring packer setting in the utility model;
Fig. 4 is for boring the structural representation behind the packer setting in the utility model.
The specific embodiment
The specific embodiment of laminated distributor under well fracturing technology tubing string is as shown in Figure 1 in the utility model; It is mainly by being serially connected in high-pressure hydraulic anchor 101, upper strata pressure break packer 102, sliding sleeve sandblaster 103, the sealing inserter 105 on the oil pipe 100 successively and can boring packer 104 and form; Wherein, Upper strata pressure break packer adopts Y111 type packer, and this Y111 type packer and high-pressure hydraulic anchor 101, sliding sleeve sandblaster 103 and sealing inserter 105 are prior art, repeat no more here.The concrete structure that can bore packer 104 is as shown in Figure 2; This can bore packer 104 and be made up of upper slips 1, last tapered sleeve 2, middle packing element 4, central tube 5, following tapered sleeve 6, lower slips 8 and baffle ring 9; Wherein, Axially offer and seal the jack that the insertion end of inserter 105 is sealed and matched in the central tube 5; Middle packing element 5 slip caps are contained in the outer wall middle part of central tube 5, last tapered sleeve 2 and down tapered sleeve 6 be slidedly assemblied in respectively on central tube 5 outer walls of middle packing element 4 upper and lowers and with the both ends of the surface contact matching of middle packing element 4, simultaneously.Shop bolt 3,7 positioning and fixing that worn by correspondence respectively of tapered sleeve 2,6 are on the outer wall of central tube 5 up and down; Be respectively equipped with on the external surface of tapered sleeve 2,6 up and down by each other near base portion to the diminishing annular conical surface in its end; Annular conical surface slip cap on the top of last tapered sleeve 2 through the correspondence setting is equipped with upper slips 1; Annular conical surface slip cap in the bottom of descending tapered sleeve 6 through the correspondence setting is equipped with lower slips 8, on the outer wall of the lower end of central tube 5, also is fixed with the baffle ring 9 that cooperates with lower slips 8 bottom surface blocks through the external screw thread spinning.
During construction, set tubing string under the elder generation, as shown in Figure 3; At first with setting tool with can bore packer and connect, will break ring 10 again and connect with setting tool, be lowered to 100 li of sleeve pipes with oil pipe; After can boring packer arrival desired location, in oil pipe, throw steel ball in setting tool, in oil pipe, suppress 16Ma again; The part 13 of setting tool is pushed to slips 1 downwards, and the annular conical surface slip spreading of the last tapered sleeve 2 in upper slips 2 edges and promotion are simultaneously gone up tapered sleeve 2 and cut off shop bolt 3 to lower slider, the middle packing element 4 of extruding; Tapered sleeve 6 under middle packing element 4 moves down under last tapered sleeve 2 promotes and promotes, following tapered sleeve 6 slides through the crowded lower slips 8 of opening of annular conical surface downwards after cutting off shop bolt 7, and setting tool part 12 is broken ring 10 through center-pole 11 and is kept transfixion; When upper slips 1, go up tapered sleeve 2, middle packing element 4, central tube 5, offer packing element 4 in the middle of the compression after tapered sleeve 6 and lower slips 8 are stopped by baffle ring 9 down, upper slips 1, lower slips 8 expand and sting on the inwall of sleeve pipe 100 simultaneously, realization can be bored setting of packer; Continue to improve tubing pressure to 25Ma; Make and break ring 10 by being broken, completion is given up, and plays flowline and setting tool; Can bore packer and stay the down-hole, as shown in Figure 4.
Second time following operating tool string: will be serially connected in high-pressure hydraulic anchor 101 under the oil pipe, Y111 pressure break packer 102, sliding sleeve sandblaster 103, sealing inserter 105 successively according to concrete design attitude and link together and form under the operating tool string lower going-into-well; Postpone puts in place under the operating tool string; The insertion end of sealing inserter 105 is inserted in the central tube 5 that can bore packer 104; 8 tons of loads of downward pressurization, the good fracture well head of seat is waited for construction.During construction, first pressure break lower floor after lower floor's pressure break finishes, opens the sliding sleeve of sliding sleeve sandblaster 103, pressure break upper strata again through pitching.After pressure break finishes to stop spray; Carry oil pipe directly hydraulic anchor 101, Y111 pressure break packer 102, sliding sleeve sandblaster 103, sealing inserter 105 are tripped out ground; Stay (like Fig. 4) in the well and can bore packer 104; Flat junk mill again can bore grinding off of packer 104, through well-flushing chip cleared up away in well at last.
The concrete structure of the bored packer of the utility model is existing in the above-described embodiments to be described in detail, repeats no more here.
Claims (6)
1. laminated distributor under well fracturing technology tubing string; Comprise oil pipe, high-pressure hydraulic anchor, pressure break packer, sliding sleeve sandblaster, sealing inserter and can bore packer; The described packer that bores comprises central tube; Be provided with and seal the jack that the insertion end of inserter is sealed and matched in the central tube; Packing element in the middle of slip cap is equipped with on the outer wall of the middle part of central tube, tapered sleeve and hypocentrum on slip cap is equipped with respectively on the central tube outer wall at the two ends of packing element in the middle of be positioned at, described upper and lower tapered sleeve be respectively equipped with by relatively near base portion to the diminishing annular conical surface in the end of correspondence; On upper and lower tapered sleeve, through the annular conical surface slip cap on it upper and lower slips is housed respectively; It is characterized in that the upper and lower slips of described upper and lower centrum and corresponding suit is divided into the two ends of central tube, on the outer wall of central tube lower end, go back fixed cover the baffle ring that cooperates with the bottom surface block of lower slips is housed.
2. laminated distributor under well fracturing technology tubing string according to claim 1; It is characterized in that; The shop bolt that described upper and lower tapered sleeve is provided for when setting, being cut off through correspondence respectively is fixed on the central tube outer wall, and the two ends up and down of said middle packing element are gripped by the upper and lower tapered sleeve of correspondence respectively.
3. laminated distributor under well fracturing technology tubing string according to claim 1 is characterized in that, on the circumferential exterior surface of said upper and lower slips, is respectively equipped with the helical teeth that is used for the internal surface of sleeve pipe interlock, and the helical teeth between the upper and lower slips is towards opposing setting.
4. one kind can be bored packer; Comprise central tube; Be provided with and seal the jack that the insertion end of inserter is sealed and matched in the central tube; Packing element in the middle of slip cap is equipped with on the outer wall of the middle part of central tube, tapered sleeve and hypocentrum on slip cap is equipped with respectively on the central tube outer wall at the two ends of packing element in the middle of be positioned at, described upper and lower tapered sleeve be respectively equipped with by relatively near base portion to the diminishing annular conical surface in the end of correspondence; On upper and lower tapered sleeve, through the annular conical surface slip cap on it upper and lower slips is housed respectively; It is characterized in that the upper and lower slips of described upper and lower centrum and corresponding suit is divided into the two ends of central tube, on the outer wall of central tube lower end, go back fixed cover the baffle ring that cooperates with the bottom surface block of lower slips is housed.
5. the packer that bores according to claim 4; It is characterized in that; The shop bolt that described upper and lower tapered sleeve is provided for when setting, being cut off through correspondence respectively is fixed on the central tube outer wall, and the two ends up and down of said middle packing element are gripped by the upper and lower tapered sleeve of correspondence respectively.
6. the packer that bores according to claim 4 is characterized in that, on the circumferential exterior surface of said upper and lower slips, is respectively equipped with the helical teeth that is used for the internal surface of sleeve pipe interlock, and the helical teeth between the upper and lower slips is towards opposing setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120397045 CN202250018U (en) | 2011-10-18 | 2011-10-18 | Underground separate-layer fracturing technical tubular column and drillable packer thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120397045 CN202250018U (en) | 2011-10-18 | 2011-10-18 | Underground separate-layer fracturing technical tubular column and drillable packer thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202250018U true CN202250018U (en) | 2012-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120397045 Expired - Lifetime CN202250018U (en) | 2011-10-18 | 2011-10-18 | Underground separate-layer fracturing technical tubular column and drillable packer thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202250018U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777139A (en) * | 2012-07-20 | 2012-11-14 | 中国石油化工股份有限公司 | Method for downhole coat transferring |
| CN105863554A (en) * | 2016-05-05 | 2016-08-17 | 中国石油集团渤海钻探工程有限公司 | Embedded sealing unit |
-
2011
- 2011-10-18 CN CN 201120397045 patent/CN202250018U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777139A (en) * | 2012-07-20 | 2012-11-14 | 中国石油化工股份有限公司 | Method for downhole coat transferring |
| CN102777139B (en) * | 2012-07-20 | 2015-03-25 | 中国石油化工股份有限公司 | Method for downhole coat transferring |
| CN105863554A (en) * | 2016-05-05 | 2016-08-17 | 中国石油集团渤海钻探工程有限公司 | Embedded sealing unit |
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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 |
Granted publication date: 20120530 |
|
| CX01 | Expiry of patent term |