CN203847058U - Lifting type oil tube plugging device - Google Patents
Lifting type oil tube plugging device Download PDFInfo
- Publication number
- CN203847058U CN203847058U CN201420239624.4U CN201420239624U CN203847058U CN 203847058 U CN203847058 U CN 203847058U CN 201420239624 U CN201420239624 U CN 201420239624U CN 203847058 U CN203847058 U CN 203847058U
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- piston cylinder
- plugging device
- shell
- piston
- packing element
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Abstract
The utility model belongs to the technical field of low-permeability oil and gas field reservoir reformation, and particularly provides a lifting type oil tube plugging device. The device comprises an upper tubular shell and a lower tubular shell, the upper end of the upper shell is connected with an upper connector, the lower end of the upper shell is connected with a lower piston cylinder, an upper piston and a rubber cylinder are arranged in the upper shell, the upper end face of the upper piston is connected with the rubber cylinder and fixes the rubber cylinder to the upper end of the upper shell, the lower end face of the upper piston is connected with an upper piston cylinder, the upper piston cylinder is arranged in the lower piston cylinder in a sleeved mode, the lower end of the lower shell is connected with a lower connector, a lower piston is arranged inside the lower shell, the lower piston cylinder is inserted into the upper end of the lower shell and is connected into the lower shell in a sleeved mode, and the lower end of the lower piston cylinder is connected with the upper end face of the lower piston. The lifting type oil tube plugging device has the advantages that the device is expanded and deforms by compressing the rubber cylinder, the technical requirement of plugging an inner cavity of an oil tube is met, the process programs of oil tube plugging and salvage are omitted, and the technological requirement of accelerating construction progress is met.
Description
Technical field
The utility model belongs to hypotonic oil gas field stimulation technology field, is specifically related to a kind of top uncoupling type tubing plugging device.
Background technology
With pressure to drag continuous Fracturing Technology be that the conventional hydraulic jetting fracturing operation of a kind of ratio is more superior, reliable new technology, can realize one-trip string multistage and drag continuous construction operation.This technology can reduce the engineering time of controlling open flow, recoil to greatest extent, reduces well control risk, improves operating efficiency.
Tubing string chamber pressure control technology is to realize the prerequisite that drags operation with pressure, if do not carry out the control of oil pipe internal pressure, cannot lay down well head and carry out oil pipe and drag.At present, oil pipe internal pressure control device is for by throwing in retrievable bridge plug or waterpower pump injection type bridging plug with shutoff oil pipe chamber in tubing string, and these means exist easy sand card, set, deblocking difficulty and throw stifled after tubing plug salvage the shortcoming that difficulty maybe cannot be salvaged.
Utility model content
The purpose of this utility model is to overcome in prior art with pressurely while dragging successive fracture treatment, and tubing plug is salvaged the problem that difficulty maybe cannot be salvaged.
For this reason, the utility model provides a kind of top uncoupling type tubing plugging device, comprises the lower casing of the upper outside shell-and-tube shape of tubulose; The upper end of described upper shell connects top connection, lower end connects lower piston cylinder, in upper shell, be provided with upper piston and packing element, the upper surface of upper piston connects packing element and is fixed in the upper end of shell, the lower surface of upper piston is connected with upper piston cylinder, and described upper piston jacket casing is in described lower piston cylinder; Described lower casing lower end connects lower contact, and lower casing inside is provided with lower piston, and described lower piston cylinder inserts and is socketed in lower casing from the upper end of lower casing, and the lower end of lower piston cylinder is connected with the upper surface of lower piston.
Between the outer wall bottom of described upper piston cylinder and lower piston cylinder inwall, be provided with O-ring seal.
Described sealing ring has two.
On the barrel of described lower piston cylinder, offer and unload oilhole; On the tube wall of described lower casing, offer oil filler point and steam vent.
The described oilhole that unloads has two, is symmetricly set on the sidewall of lower piston cylinder.
Between described packing element and top connection, be sealed with a circle vulcanized rubber.
Described packing element is compression type glue barrel, and the external diameter of packing element is 100-114mm, and internal diameter is 50-55mm, and length is 650-900mm.
The tensile strength of described packing element is 70KN, anti-interior pressure as 70MPa, anti-outer squeezing as 50MPa, 120 DEG C of heatproofs, seal and pressure bearing 35MPa.
The upper end of described top connection, the lower end of lower contact are respectively by 2
7/
8" strengthen tubing thread and be connected with oil pipe, described 2
7/
8" strengthening tubing thread is EUE button-type.
The beneficial effects of the utility model: this top uncoupling type tubing plugging device utilization compression packing element that the utility model provides makes its dilatancy, reach the technical requirements of shutoff oil pipe inner chamber, save the process of oil pipe blocking and salvaging, save the on-the-spot fracturing work time, reached the technological requirement of accelerating construction progress.
Below with reference to accompanying drawing, the utility model is described in further details.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is tool pipe string structure schematic diagram.
Description of reference numerals: 1, top uncoupling type tubing plugging device; 2, vulcanized rubber; 3, upper shell; 4, packing element; 5, upper piston; 6, upper piston cylinder; 7, interior fluid cylinder; 8, lower casing; 9, lower piston cylinder; 10, outer fluid cylinder; 11, oil filler point; 12, sealing ring; 13, lower piston; 14, top connection; 15, unload oilhole; 16, steam vent; 17, lower contact; 18, oil pipe; 19, safety joint; 20, pipe nipple; 21, spray gun; 22, centralizer; 23, ball-and-seat; 24, equalizing valve; 25, rail mounted packer; 26, guiding plug.
Detailed description of the invention
Existing with pressure while dragging successive fracture treatment for solving, adopt to be lowered to tubing plug and to stop up oil pipe, exist throw stifled after tubing plug salvage that difficulty maybe cannot be salvaged, input and the fishing time is long, the problem that takies the on-the-spot fracturing work time.As shown in Figure 1, the utility model provides a kind of top uncoupling type tubing plugging device, comprises the upper shell 3 of tubulose and the lower casing 8 of tubulose; The upper end of described upper shell 3 connects top connection 14, and as shown in Figure 2, the upper end of top connection 14 is by 2
7/
8" strengthen tubing thread and be connected with oil pipe 18,2
7/
8" strengthening tubing thread is EUE button-type; the lower end of upper shell 3 connects lower piston cylinder 9; in upper shell 3, be provided with upper piston 5 and packing element 4; upper surface of upper piston 5 connects packing element 4 and is fixed in the upper end of shell 3; lower surface of upper piston 5 is connected with upper piston cylinder 6, and described upper piston cylinder 6 is enclosed within described lower piston cylinder 9;
Described lower casing 8 lower ends connect lower contact 17, and the lower end of lower contact 17 is by 2
7/
8" strengthen tubing thread and be connected with oil pipe 18,2
7/
8" strengthening tubing thread is EUE button-type.Lower casing 8 inside are provided with lower piston 13, and described lower piston cylinder 9 inserts and is socketed in lower casing 8 from the upper end of lower casing 8, and the lower end of lower piston cylinder 9 is connected with the upper surface of lower piston 13.
Between packing element 4 and top connection 14, be sealed with a circle vulcanized rubber 2, the toughness of vulcanized rubber 2 is large, and packing element 4 is had to protective effect.Described packing element 4 is compression type glue barrel, and the external diameter of packing element 4 is 100-114mm, and internal diameter is 50-55mm, and length is 650-900mm.The tensile strength of packing element 4 is 70KN, anti-interior pressure as 70MPa, and anti-outer squeezing as 50MPa, 120 DEG C of heatproofs, seal and pressure bearing 35MPa, packing element 4 passes through compression-expansion, reaches the object of shutoff oil pipe 18 inner chambers.
Between the outer wall bottom of described upper piston cylinder 6 and lower piston cylinder 9 inwalls, be provided with O-ring seal 12, sealing ring 12 has two, is distributed in up and down the lower end of upper piston cylinder 6.The space that upper piston 5, upper piston cylinder 6, lower piston cylinder 9, upper shell 3 and sealing ring 12 form is interior fluid cylinder 7, on the two side of interior fluid cylinder 7, on the barrel of lower piston cylinder 9, offer and unload oilhole 15, described in unload oilhole 15 and have two, be symmetricly set on the barrel of lower piston cylinder 9.The space that described lower piston cylinder 9, lower casing 8 and lower piston 13 form is outer fluid cylinder 10, and the hydraulic oil in inside and outside fluid cylinder passes in and out by unloading oilhole 15.
On the tube wall of lower casing 8, offer oil filler point 11, when construction, first by oil filler point 11 to injection liquid force feed in inside and outside fluid cylinder, then the upper lower contact of this device is joined with oil pipe 18 respectively.For the ease of hydraulic oil being filled in inside and outside fluid cylinder, on the tube wall of lower casing 8, offer steam vent 16, before injection liquid force feed, the gas of draining in inside and outside fluid cylinder by steam vent 16.
When Specific construction, this top uncoupling type tubing plugging device 1 need use with the assembly of horizontal well drag fracturing drilling tool with pressure, as shown in Figure 2, the tool string combining is oil pipe 18+ top uncoupling type tubing plugging device 1+ oil pipe 18+ safety joint 19+ pipe nipple 20+ spray gun 21+ centralizer 22+ ball-and-seat 23+ equalizing valve 24+ rail mounted packer 25+ guiding plug 26.This top uncoupling type tubing plugging device 1 is lowered in horizontal well together with drilling tool, wherein this device is lowered to straight well place, transferring after track packer 25 sets successfully, now transfers tubing string again and could allow this install not bearing tension, its internal channel is opened completely, reached the requirement of construction.
Carry out after first paragraph construction, upper lifting pipe post, lower casing 8 moves downward under oil pipe 18 Gravitative Loads, hydraulic oil in the outer fluid cylinder 10 of lower piston 13 compression, hydraulic oil enters interior fluid cylinder 7 by unloading oilhole 15, and hydraulic oil produces thrust upwards to upper piston 5, and upper piston 5 compresses packing element 4, inside expansion plugging oil pipe 18 inner chambers of packing element 4, reach the object of shutoff oil pipe 18.
While transferring tubing string, because tubing string lower end is connected with rail mounted packer 25, this rail mounted packer 25 sets under rail effect, therefore lower casing 8 is motionless, upper shell 3 moves down, and promotes lower piston 13 and moves down, hydraulic oil enters in outer fluid cylinder 10 by unloading oilhole 15, upper piston 5 moves downward, and packing element 4 resets, inner chamber deblocking.
This top uncoupling type tubing plugging device 1 that the present embodiment provides, when construction, make device two ends be subject to certain pulling force, pulling force acts on piston compression hydraulic oil and promotes another piston, and the inside dilatancy of this piston compression packing element 4, reaches the technical requirements of shutoff oil pipe 18 inner chambers; Save oil pipe blocking and fishing process program, reached the technological requirement of accelerating construction progress.
The present embodiment does not have specifically described part all to belong to common practise and the known technology of the art, and if needed, we can provide reference!
Claims (9)
1. a top uncoupling type tubing plugging device, is characterized in that: comprise the upper shell (3) of tubulose and the lower casing (8) of tubulose;
The upper end of described upper shell (3) connects top connection (14), lower end connects lower piston cylinder (9), in upper shell (3), be provided with upper piston (5) and packing element (4), the upper surface of upper piston (5) connects packing element (4) and is fixed in the upper end of shell (3), the lower surface of upper piston (5) is connected with upper piston cylinder (6), and described upper piston cylinder (6) is enclosed within described lower piston cylinder (9);
Described lower casing (8) lower end connects lower contact (17), and lower casing (8) inside is provided with lower piston (13), above-mentioned lower piston cylinder (9) inserts and is socketed in lower casing (8) from the upper end of lower casing (8), and the lower end of lower piston cylinder (9) is connected with the upper surface of lower piston (13).
2. a kind of top uncoupling type tubing plugging device as claimed in claim 1, is characterized in that: between the outer wall bottom of described upper piston cylinder (6) and lower piston cylinder (9) inwall, be provided with O-ring seal (12).
3. a kind of top uncoupling type tubing plugging device as claimed in claim 2, is characterized in that: described sealing ring (2) has two.
4. a kind of top uncoupling type tubing plugging device as claimed in claim 1, is characterized in that: on the barrel of described lower piston cylinder (9), offer and unload oilhole (15); On the tube wall of described lower casing (8), offer oil filler point (11) and steam vent (16).
5. a kind of top uncoupling type tubing plugging device as claimed in claim 4, is characterized in that: described in unload oilhole (15) and have two, be symmetricly set on the barrel of lower piston cylinder (9).
6. a kind of top uncoupling type tubing plugging device as claimed in claim 1, is characterized in that: between described packing element (4) and top connection (14), be sealed with a circle vulcanized rubber (2).
7. a kind of top uncoupling type tubing plugging device as claimed in claim 6, is characterized in that: described packing element (4) is compression type glue barrel, and the external diameter of packing element (4) is 100-114mm, and internal diameter is 50-55mm, and length is 650-900mm.
8. a kind of top uncoupling type tubing plugging device as described in claim 6 or 7, is characterized in that: the tensile strength of described packing element (4) is 70KN, anti-interior pressure as 70MPa, anti-outer squeezing as 50MPa, 120 DEG C of heatproofs, seal and pressure bearing 35MPa.
9. a kind of top uncoupling type tubing plugging device as claimed in claim 1, is characterized in that: the upper end of described top connection (14), the lower end of lower contact (17) are respectively by 2
7/
8" strengthen tubing thread and be connected with oil pipe (18), described 2
7/
8" strengthening tubing thread is EUE button-type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420239624.4U CN203847058U (en) | 2014-05-12 | 2014-05-12 | Lifting type oil tube plugging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420239624.4U CN203847058U (en) | 2014-05-12 | 2014-05-12 | Lifting type oil tube plugging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203847058U true CN203847058U (en) | 2014-09-24 |
Family
ID=51560092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420239624.4U Withdrawn - After Issue CN203847058U (en) | 2014-05-12 | 2014-05-12 | Lifting type oil tube plugging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203847058U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967443A (en) * | 2014-05-12 | 2014-08-06 | 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 | Upward lifting type oil pipe plugging device |
-
2014
- 2014-05-12 CN CN201420239624.4U patent/CN203847058U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967443A (en) * | 2014-05-12 | 2014-08-06 | 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 | Upward lifting type oil pipe plugging device |
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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: 20140924 Effective date of abandoning: 20160413 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |