CN206942727U - A kind of differential calker of down-hole string - Google Patents
A kind of differential calker of down-hole string Download PDFInfo
- Publication number
- CN206942727U CN206942727U CN201720520673.9U CN201720520673U CN206942727U CN 206942727 U CN206942727 U CN 206942727U CN 201720520673 U CN201720520673 U CN 201720520673U CN 206942727 U CN206942727 U CN 206942727U
- Authority
- CN
- China
- Prior art keywords
- central tube
- housing
- sealing shroud
- calker
- hole string
- 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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- Earth Drilling (AREA)
Abstract
The utility model is a kind of differential calker of down-hole string, it is mainly used in the brill sand washing in oil well repairing operation, in the construction such as slurry, milling, the circulation canal of down-hole string is opened during construction under differential pressure action, the circulation canal of down-hole string is by temporary closure during shut-down, prevent that well head workover fluid is excessive, realize the safely cleaning production of underground work.This calker includes housing, central tube and sealing shroud, central tube is provided with baffle plate and internal partition, partially unrolling hole is equipped with the baffle plate at central tube both ends, the body of internal partition both sides is provided with circulation port, central tube and sealing shroud are installed in housing, the both sides installation spring of sealing shroud and the circulation port for being fixed by a pin on housing, blocking central tube, housing both ends are connected with top connection and lower contact, realize clean manufacturing, the purpose of safety in production.Simultaneously because well head cleans, operating efficiency can be improved, safety hazards is eliminated, there is good using effect and economic benefit.
Description
Technical field
The utility model is the well workover aid of petroleum industry, especially a kind of differential calker of down-hole string,
In being mainly used in the brill sand washing in oil well repairing operation, being constructed for slurry, milling etc., downhole tubular is opened under differential pressure action during construction
The circulation canal of post, the circulation canal of down-hole string is prevented that well head workover fluid is excessive, is realized that underground is made by temporary closure during shut-down
The safely cleaning production of industry.
Background technology
Bore punching, for constructions such as mud be the normal process steps in oil well repairing operation, principle is by high-velocity fluid by pump truck
Inject into well, shaft bottom deposit etc. is carried out into ground.Oil jacket is uneven during due to construction, during lower oil tube well liquid from
Well head overflows, and causes well head pollution, miriness, is unfavorable for keeping the safety in production.To clean, keeping the safety in production, it is necessary to a kind of down-hole string
Calker, during lower oil tube can temporary closure well head, reach the purpose of clean and safe production.
The content of the invention
The purpose of this utility model is just to provide a kind of differential calker of down-hole string, is connected in operating tool string
Between, do not influence normal construction, by hydraulic open circulation canal during construction, during lower oil tube, temporary closure circulation canal, prevent
Well liquid is excessive, realizes cleaning, the purpose of safety in production.
What the purpose of this utility model was realized in：A kind of differential calker of down-hole string includes housing, center
Pipe and sealing shroud, central tube are provided with baffle plate and internal partition, partially unrolling hole, internal partition two are equipped with the baffle plate at central tube both ends
The body of side is provided with circulation port, and central tube and sealing shroud are installed in housing, and the both sides installation spring of sealing shroud simultaneously passes through
Pin is fixed on housing, blocked the circulation port of central tube, and housing both ends are connected with top connection and lower contact.
Remarkable result of the present utility model is：This instrument is under the working condition of normal lower oil tube, sealing shroud sealing
The circulation ports of central tube internal partition both sides, when boring sand washing, being constructed for slurry, milling etc., workover fluid is from the entrance of partially unrolling hole, bullet
Spring is compressed under differential pressure action, and central tube is moved down, the circulation port of side leaves sealing shroud, and the circulation for establishing down-hole string is led to
Road.When boring sand washing, stopping for constructions such as slurry, millings, under the action of the spring, central tube moves up, the circulation port of both sides temporarily seals
Stifled circulation canal, the pressure balance in oil pipe and sleeve pipe, now lower oil tube operation, well liquid would not overflow from well head, realization
Clean manufacturing, the purpose of safety in production.Simultaneously because well head cleans, operating efficiency can be improved, eliminates safety hazards, tool
There are good using effect and economic benefit.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
The utility model is described in detail below in conjunction with accompanying drawing, not limits the scope of protection of the utility model.It is as described below to be only
Preferred embodiment of the present utility model, it is not used to limit the scope of protection of the utility model, other are with of the present utility model etc.
Effect change, all should belong to the scope of protection of the utility model.
Referring to Fig. 1, a kind of differential calker of down-hole string includes housing 2, central tube 5 and sealing shroud 8, central tube 5
Provided with baffle plate 6 and internal partition, it is equipped with the body of partially unrolling hole 3, internal partition both sides and sets on the baffle plate 6 at the both ends of central tube 5
There is circulation port 9, central tube 5 and sealing shroud 8 are installed in housing 2, and the both sides installation spring 4 of sealing shroud 8 is simultaneously solid by pin 7
The circulation port 9 of central tube 5 is scheduled on housing 2, blocks, the both ends of housing 2 are connected with top connection 1 and lower contact 10.
The external diameter of the baffle plate 6 is less than the internal diameter 3mm-8mm of housing 2, can slide freely central tube 5.
The height of the sealing shroud 8 is more than the total height of internal partition both sides circulation port 9, all blocks circulation port 9.
The top connection 1 and lower contact 10 are respectively equipped with inner oil tube screw thread and outer oil pipe screw thread, are attached to oil pipe column
In；The internal diameter for the connection end that top connection 1 and lower contact 10 are connected with central tube 5 be respectively less than housing 2 internal diameter, centered on the shape of pipe 5
Into limited step.
In use, this instrument is connected among underground construction tubing string, when direct circulation is constructed, workover fluid is from partially unrolling hole
3 enter, and under hydraulic action, the spring 4 on top is compressed, and circulation port 9 is displaced downwardly to the bottom of sealing shroud 8 with central tube 5, builds
The circulation canal for boring the constructions such as sand washing is found；When stopping construction, central tube 5 moves up in the presence of spring 4, and sealing shroud 8 will follow
Annular distance 9 temporarily blocks up, closes circulation canal.When reacting cycle is constructed, under hydraulic action, the spring 4 of bottom is compressed, circulation port 9
With the top that sealing shroud 8 is moved on central tube 5, circulation canal is established；When stopping constructing in the presence of spring 4, central tube 5
Move down, circulation port 9 is temporarily blocked up, closes circulation canal by sealing shroud 8.
The embodiment described above is only exemplary embodiments, but the utility model is not limited only to these embodiments, ability
The technical staff in domain can make modification under without departing from spirit of the present utility model and enlightenment.Aspect disclosed herein may
In the presence of many changes, combination and modification, and all in the scope of the utility model, therefore, protection domain is not limited only to above
Explanation.
Claims (4)
1. a kind of differential calker of down-hole string, it is characterized in that, including housing, central tube and sealing shroud, central tube be provided with
Baffle plate and internal partition, are equipped with partially unrolling hole on the baffle plate at central tube both ends, the body of internal partition both sides is provided with circulation port,
Central tube and sealing shroud are installed in housing, and the both sides installation spring of sealing shroud is simultaneously fixed by a pin on housing, blocked
The circulation port of central tube, housing both ends are connected with top connection and lower contact.
2. a kind of differential calker of down-hole string as claimed in claim 1, it is characterized in that, the external diameter of the baffle plate is less than
The internal diameter 3mm-8mm of housing.
3. a kind of differential calker of down-hole string as claimed in claim 2, it is characterized in that, the height of the sealing shroud is big
Total height in internal partition both sides circulation port, circulation port all blocked.
4. a kind of differential calker of down-hole string as claimed in claim 1, it is characterized in that, the top connection and lower contact
It is respectively equipped with inner oil tube screw thread and outer oil pipe screw thread；The internal diameter for the connection end that top connection and lower contact are connected with central tube is respectively less than
The internal diameter of housing, centered on pipe formed limited step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720520673.9U CN206942727U (en) | 2017-05-11 | 2017-05-11 | A kind of differential calker of down-hole string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720520673.9U CN206942727U (en) | 2017-05-11 | 2017-05-11 | A kind of differential calker of down-hole string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206942727U true CN206942727U (en) | 2018-01-30 |
Family
ID=61361556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720520673.9U Expired - Fee Related CN206942727U (en) | 2017-05-11 | 2017-05-11 | A kind of differential calker of down-hole string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206942727U (en) |
-
2017
- 2017-05-11 CN CN201720520673.9U patent/CN206942727U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180130 Termination date: 20200511 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |