CN207420484U - The differential elastic centralizer of big orifice - Google Patents
The differential elastic centralizer of big orifice Download PDFInfo
- Publication number
- CN207420484U CN207420484U CN201721601311.9U CN201721601311U CN207420484U CN 207420484 U CN207420484 U CN 207420484U CN 201721601311 U CN201721601311 U CN 201721601311U CN 207420484 U CN207420484 U CN 207420484U
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- piston
- central tube
- water
- piston bush
- water nozzle
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Abstract
The utility model belongs to oilfield downhole operation apparatus field, more particularly to a kind of differential elastic centralizer of big orifice, including central tube, piston bush, piston and reed, piston bush is fixedly connected on central tube, piston is mounted in piston bush, water hole is provided on central tube, after being suppressed in central tube, high pressure water enters plunger shaft by water hole and promotes piston, then actuating spring makes reed prop outward, it is provided on the piston bush and sets pin for fixed piston, pin is set to be threadedly attached on piston bush, water nozzle is provided at the water hole, water nozzle is threadedly attached in the outside of central tube, the center of water nozzle is provided with runner, filter screen is pressed between the end of water nozzle and central tube.The utility model is provided with and sets pin, and setting pin can ensure that centralizer will not open during going into the well, and can effectively avoid the unnecessary abrasion of centralizer, can also make tubing string decentralization more smooth.
Description
Technical field
The utility model belongs to oilfield downhole operation apparatus field more particularly to a kind of differential elastic righting of big orifice
Device.
Background technology
Tubing centrilizer is common a kind of downhole tool in oilfield downhole operation work progress, in use, by centralizer
Being connected on oil pipe column can make oil pipe in casing in.Hydraulic jet perforation is a kind of perforation new process, in the process,
It is required that oil pipe and the latus rectum in casing off and centralizer are larger (the preferably equal to latus rectum of oil pipe), meanwhile, pressurization in oil pipe
When centralizer prop (rise centralizing function), centralizer is packed up and (does not play centralizing function) when being not pressurized in oil pipe.However, at present not
There is the tubing centrilizer for meeting this requirement.But the utility model patent that notification number is CN206309302U discloses
A kind of hydraulic casing pipe centering device for well cementation, this centralizer can meet tubing centrilizer in hydraulic jet perforation by transformation
Requirement.
The content of the invention
The utility model provides a kind of differential elastic centralizer of big orifice, to solve mentioned above in the background art ask
Topic.
The technical issues of the utility model solves is realized using following technical scheme：The utility model provides a kind of big
The differential elastic centralizer of latus rectum, including central tube, piston bush, piston and reed, piston bush is fixedly connected on central tube, living
Plug is mounted in piston bush, water hole is provided on central tube, after being suppressed in central tube, high pressure water is entered plunger shaft by water hole and pushed away
Piston, then actuating spring reed is made to prop outward, be provided on the piston bush and set pin for fixed piston
Nail, sets pin and is threadedly attached on piston bush, water nozzle is provided at the water hole, during water nozzle is threadedly attached in
The outside of heart pipe, the center of water nozzle are provided with runner, filter screen are pressed between the end of water nozzle and central tube.
Thread locking adhesive is scribbled at the connection screw thread for setting pin and piston bush.The filter screen is by bulk
Steel wire is made.
The beneficial effects of the utility model are：
1st, the utility model is provided with and sets pin, and setting pin can ensure that centralizer will not open during going into the well, can
The unnecessary abrasion of centralizer is effectively avoided, can also make tubing string decentralization more smooth.
2nd, in abrasive perforating technique, added with substantial amounts of quartz sand in the high pressure water in oil pipe, the utility model is in water
Filter screen is provided at hole, the quartz sand in water can be effectively filtered out, prevent quartz sand from entering plunger shaft, avoid piston by quartz sand
It is stuck.
3rd, filter screen is made of the steel wire of bulk, and service life is long, and without cleaning.
Description of the drawings
Fig. 1 is the structure diagram of the utility model；
Fig. 2 is the partial enlarged view at A in Fig. 1.
In figure：1- central tubes, 2- reeds, 3- pistons, 4- set pin, 5- piston bush, 6- water nozzles, 7- runners, 8- filterings
Net.
Specific embodiment
The utility model is described further below in conjunction with attached drawing：
The present embodiment includes central tube 1, piston bush 5, piston 3 and reed 2, and piston bush 5 is fixedly connected on central tube 1,
Piston 3 is mounted in piston bush 5, water hole is provided on central tube 1, after being suppressed in central tube 1, high pressure water enters piston by water hole
Chamber simultaneously promotes piston 3, and then actuating spring 2 makes reed 2 prop outward.It is above already existing structure in the prior art,
Details are not described herein.
It is provided on the piston bush 5 and sets pin 4 for fixed piston 3, set pin 4 and be threadedly attached in
On piston bush 5.Setting pin 4 can ensure that centralizer will not open during going into the well, and can effectively avoid the unnecessary mill of centralizer
Damage can also make tubing string decentralization more smooth.
Water nozzle 6 is provided at the water hole, water nozzle 6 is threadedly attached in the outside of central tube 1, the center of water nozzle 6
Runner 7 is provided with, filter screen 8 is pressed between the end of water nozzle 6 and central tube 1.In abrasive perforating technique, the height in oil pipe
It presses added with substantial amounts of quartz sand in water, the utility model is provided with filter screen 8 at water hole, can effectively filter out the quartz in water
Sand prevents quartz sand from entering plunger shaft, avoids piston 3 stuck by quartz sand.
Described sets pin 4 with scribbling thread locking adhesive at the connection screw thread of piston bush 5, it is ensured that threaded connection place
Sealing, so as to ensure the sealing of plunger shaft.
Filter screen 8 is made of the steel wire of bulk, and service life is long, and without cleaning.
Claims (3)
1. a kind of differential elastic centralizer of big orifice, living including central tube (1), piston bush (5), piston (3) and reed (2)
Plug sleeve (5) is fixedly connected on central tube (1), and piston (3) is mounted in piston bush (5), and central tube is provided with water hole on (1),
After being suppressed in central tube (1), high pressure water enters plunger shaft by water hole and promotes piston (3), and then actuating spring (2) makes reed
(2) prop outward, it is characterised in that：It is provided on the piston bush (5) and sets pin (4) for fixed piston (3),
It sets pin (4) to be threadedly attached on piston bush (5), water nozzle (6) is provided at the water hole, water nozzle (6) passes through spiral shell
Line is connected to the outside of central tube (1), and the center of water nozzle (6) is provided with runner (7), the end and central tube (1) of water nozzle (6) it
Between be pressed with filter screen (8).
2. a kind of differential elastic centralizer of big orifice according to claim 1, it is characterised in that：Described sets pin
(4) with scribbling thread locking adhesive at the connection screw thread of piston bush (5).
3. a kind of differential elastic centralizer of big orifice according to claim 1, it is characterised in that：The filter screen
(8) it is made of the steel wire of bulk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721601311.9U CN207420484U (en) | 2017-11-24 | 2017-11-24 | The differential elastic centralizer of big orifice |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721601311.9U CN207420484U (en) | 2017-11-24 | 2017-11-24 | The differential elastic centralizer of big orifice |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207420484U true CN207420484U (en) | 2018-05-29 |
Family
ID=62302943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721601311.9U Active CN207420484U (en) | 2017-11-24 | 2017-11-24 | The differential elastic centralizer of big orifice |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207420484U (en) |
-
2017
- 2017-11-24 CN CN201721601311.9U patent/CN207420484U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |