CN202249941U - Layering acidification drain valve - Google Patents
Layering acidification drain valve Download PDFInfo
- Publication number
- CN202249941U CN202249941U CN 201120295380 CN201120295380U CN202249941U CN 202249941 U CN202249941 U CN 202249941U CN 201120295380 CN201120295380 CN 201120295380 CN 201120295380 U CN201120295380 U CN 201120295380U CN 202249941 U CN202249941 U CN 202249941U
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- China
- Prior art keywords
- central tube
- sealing
- restrictor ring
- sealing shroud
- ring
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- Expired - Fee Related
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Abstract
The utility model relates to a layering acidification drain valve. A peripheral sliding sleeve of a central pipe along the length direction of the central pipe is provided with a throttle ring for controlling entrance of acidification liquid into an acidification layer from the central pipe; the peripheries of the pipe wall of the central pipe above and below the throttle ring are provided with an upper stop member and a lower stop member for axial limitation of the throttle ring along the central pipe; a spring is pressed against between the throttle ring and the upper stop member; the acidification drain valve also comprises a sealing sleeve which is fixedly connected with the periphery of the central pipe and covers the periphery of the spring; the peripheral surface of the sealing sleeve is provided with a circulating hole for slowly circulating fluid between the sealing sleeve and the central pipe; the sealing sleeve, the upper stop member, the throttle ring and the central pipe form a hydraulic buffer chamber; the two ends of the hydraulic buffer chamber in the length direction of the hydraulic buffer chamber are provided with an upper sealing structure and a lower sealing structure for sealing the hydraulic buffer chamber respectively; and the fit relation between the sealing sleeve and the throttle ring is sliding and sealing fit. Through the drain valve, the problem of over-high pressure instantly born by the spring during work of the conventional layering acidification drain valve is solved.
Description
Technical field
The utility model relates to the downhole tool that recovers the oil in a kind of oil field, relates in particular to a kind of separate layer acid treatment tapping valve that acidifying solution under the oil well acidation process control well is discharged in the tubing string that is used for.
Background technology
Along with the passing of oil field later development, in developing, the remaining oil of hyposmosis interval, need carry out the acidification to dispel block measure to oil well; At present the acidifying means that adopt of acidifying tubing string be through the separate layer acid treatment tapping valve to the laminated distributor under well acidifying, according to Chinese patent CN2758460 disclosed a kind of " separate layer acid treatment tapping valve ", this separate layer acid treatment tapping valve comprises central tube; The upper and lower side of said central tube spiral shell is respectively joined to be connected with and is used for top connection and the lower contact that the acidifying tubing string connects, and along its length direction slidable fit ball seat is arranged in the centre bore of said central tube, is provided with between said ball seat and the central tube to be used for the fixing pin of ball seat; The central tube periphery of said lower contact top is provided with down steel bushing along its length direction slip cap, and the central tube periphery of said top connection below is connected through pin and is arranged with steel bushing, and the top is furnished with helical spring between described upward steel bushing and the following steel bushing; Described upward steel bushing has played the effect of block member in this position, be provided with fluid passage between described steel bushing down and the central tube, and described pin below has on the central tube tube wall between following steel bushing and the ball seat and is used for acidifying solution is got into fluid passage by central tube outage; Described steel bushing down contacts with the conical surface with lower contact, and described steel bushing has down played and has been used to control the effect that acidifying solution gets into the restrictor ring of acidifying layer by central tube, when carrying out acidifying; Need steel ball be positioned on the ball seat through the acidifying tubing string, acidifying solution injects to the acidifying tubing string under the effect of force (forcing) pump, makes when acid solution arrives certain pressure; Pin is cut off; Ball seat moves down, and acidifying solution gets into fluid passage by outage, and acidifying solution promotes following steel bushing and compresses spring; Acidifying solution is by the outflow of the conical surface between steel bushing and the lower contact down; Get into the acidifying layer, because acidifying solution gets into moment of fluid passage by outage, following steel bushing produces powerful shock loading to spring; The pressure that spring moment bears is excessive; Spring can be broken through normal off, causes the damage of equipment, not only increases cost of production but also finally possibly cause the acidification technique failure.
Summary of the invention
The purpose of the utility model is to provide a kind of separate layer acid treatment tapping valve, and spring moment is born the excessive problem of pressure when solving existing separate layer acid treatment tapping valve work.
In order to address the above problem, the technical scheme of the utility model is:
The separate layer acid treatment tapping valve; Comprise central tube; Described central tube is provided with along the periphery slip cap of its length direction and is used to control acidifying solution is got into the acidifying layer by central tube restrictor ring; The central tube tube wall periphery of described restrictor ring upper and lower is provided with and is used for the upper and lower block member of restrictor ring along the central tube axial limiting; The top is furnished with spring between described restrictor ring and the last block member; Described acidifying tapping valve comprises that also the central tube periphery is connected and covers at the sealing shroud of spring periphery, offers the slowly opening of circulation of the liquid that is used between sealing shroud and the central tube on the side face of described sealing shroud, described sealing shroud, goes up block member, restrictor ring and central tube and forms the hydraulic cushion chamber; Described hydraulic cushion chamber is respectively equipped with last hermetically-sealed construction and the lower seal structure that is used for the sealing of hydraulic cushion chamber along the two ends of its length direction, described sealing shroud is that slipper seal cooperates with matching relationship between the restrictor ring.
The upper and lower end of described central tube is joined adapter sleeve through spiral shell respectively and is provided with the upper and lower joint that is used for the connection of acidifying tubing string; The described block member of going up is top connection; The periphery of described top connection is provided with and is used for the screw fit section that the sealing shroud spiral shell is joined connection; Described sealing shroud pass through the periphery that threaded engagement is sheathed on the screw fit section; The described enclosed construction of going up is for being arranged at the top connection sealing ring between sealing shroud and the top connection and between central tube and the top connection respectively; Described block member down is lower contact, and described enclosed construction down is to be arranged at the place of being slidingly matched of sealing shroud and restrictor ring and the restrictor ring sealing ring that is slidingly matched and locates of restrictor ring and central tube respectively.
Along central tube length direction slidable fit ball seat is arranged in the centre bore of said central tube; Be provided with between said ball seat and the central tube and be used for the fixing pin of ball seat; Be provided with fluid passage between described restrictor ring and the central tube, described pin below has on the central tube tube wall between restrictor ring and the ball seat and is used for acidifying solution is got into fluid passage by central tube outage.
The place of being slidingly matched of described ball seat and central tube is provided with the ball seat sealing ring.
Have on the contact end face of described restrictor ring and lower contact and be used for the annular groove that the lower contact inserting is connected.
Be provided with the lower contact sealing ring between described lower contact and the central tube.
The beneficial effect of the utility model is: the utility model passes through sealing shroud, upward block member, restrictor ring and central tube form the hydraulic cushion chamber; When the separate layer acid treatment tapping valve is not worked; Liquid is got in the hydraulic cushion chamber by the sealing shroud outside through opening; When spring received the powerful shock loading of restrictor ring, some pressure was shared by the hydraulic pressure in the hydraulic cushion chamber, had reduced the pressure that spring bore in moment; Effectively play the effect of protection spring, solved the problem of the frequent fracture of spring of existing separate layer acid treatment tapping valve.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
The specific embodiment
Embodiment is as shown in Figure 1: a kind of separate layer acid treatment tapping valve; Comprise central tube 5; The upper and lower end of described central tube 5 is joined adapter sleeve through spiral shell respectively and is provided with the top connection 1 and lower contact 14 that is used to connect the acidifying tubing string; Described central tube 5 is provided with along the periphery slip cap of its length direction and is used to control acidifying solution is got into the acidifying layers by central tube 5 restrictor ring 8; The central tube 5 tube wall peripheries of described restrictor ring 8 upper and lowers are provided with and are used for the upper and lower block member of restrictor ring 8 along central tube 5 axial limitings; The top is furnished with spring 4 between described restrictor ring 8 and the last block member; Described acidifying tapping valve comprises that also central tube 5 peripheries are connected and cover at the sealing shroud 6 of spring 4 peripheries; Offer the opening 3 of the slow circulation of liquid that is used between sealing shroud 6 and the central tube 5 on the side face of described sealing shroud 6; In the present embodiment, the described block member of going up is top connection 1, and described block member down is lower contact 14; Have on the contact end face of described restrictor ring 8 and lower contact 14 and be used for the annular groove 15 that lower contact 14 insertings are connected; Described sealing shroud 6, go up block member, restrictor ring 8 and central tube 5 and form hydraulic cushion chambeies 17, described hydraulic cushion chamber 17 is respectively equipped with last hermetically-sealed construction and the lower seal structure that is used for 17 sealings of hydraulic cushion chamber along the two ends of its length direction, and described sealing shroud 6 is that slipper seal cooperates with matching relationship between the restrictor ring 8; Sealing shroud 6 is joined the periphery that is connected in street corner 1 through the screw fit section spiral shell of top connection 1 periphery setting; The described enclosed construction of going up is for to be arranged between sealing shroud 6 and the top connection 1 respectively and the top connection sealing ring 2 between central tube 5 and the top connection 1, and described enclosed construction down is the place of being slidingly matched and the restrictor ring sealing ring 7 of restrictor ring 8 with the place that is slidingly matched of central tube 5 that is arranged at sealing shroud 6 and restrictor ring 8 respectively, and the side face of described sealing shroud 6 radially is provided with the steam vent 3 of the gas slowly release that is used between sealing shroud 6 and the central tube 5; Along central tube length direction slidable fit ball seat 13 is arranged in the centre bore of said central tube 5; Be provided with between said ball seat 13 and the central tube 5 and be used for the fixing pin 10 of ball seat 13, be provided with fluid passage 16 between described restrictor ring 8 and the central tube 5, described pin 10 belows have on central tube 5 tube walls between restrictor ring 8 and the ball seat 13 and are used for the outage 11 of acidifying solution by central tube 5 entering fluid passages 16; Described ball seat 13 is provided with ball seat sealing ring 12 with the place of being slidingly matched of central tube 5; In other embodiment of the utility model, described sealing shroud 6 can not be wholely set through threaded engagement with top connection 1 yet, and described upward block member can also be to be sheathed on other fixed cover on the central tube 5 or to be located at the bit-stopping structure of topping bar on central tube 5 outer tube walls; Described block member down can also be other fixed cover on the sheathed central tube 5 or be located at the bit-stopping structure of getting out of a predicament or an embarrassing situation on central tube 5 outer tube walls that part 9 is the lower contact sealing ring among the figure.
During use, behind the design attitude, in the acidifying tubing string, drop into steel ball in the well under the separate layer acid treatment tapping valve; Steel ball arrives 13 last times of ball seat, pressures of in the acidifying tubing string, slowly buying oil, ball seat 13 pin 10 block after; Acidifying tubing string pressure moves up through outage 11 promotion restrictor rings 8 and compresses spring 4, and containment member and central tube 5 are formed a hydraulic cushion chamber 17, and a part of power of spring 4 has been shared in hydraulic cushion chamber 17; The speed that restrictor ring 8 moves up is slow, greatly reduces the moment impact load of 8 pairs of springs 4 of restrictor ring, and spring 4 is easy fracture not; Even spring 4 is disconnected broken, because sealing shroud 6 protections can not cause down-hole accident yet; Restrictor ring 8 seals through annular groove 15 with lower contact 14 in addition, and good sealing effect is easy to process.
Claims (6)
1. separate layer acid treatment tapping valve; Comprise central tube; Described central tube is provided with along the periphery slip cap of its length direction and is used to control acidifying solution is got into the acidifying layer by central tube restrictor ring; The central tube tube wall periphery of described restrictor ring upper and lower is provided with and is used for the upper and lower block member of restrictor ring along the central tube axial limiting; The top is furnished with spring between described restrictor ring and the last block member; It is characterized in that: described acidifying tapping valve comprises that also the central tube periphery is connected and covers at the sealing shroud of spring periphery, offers the slowly opening of circulation of the liquid that is used between sealing shroud and the central tube on the side face of described sealing shroud, described sealing shroud, goes up block member, restrictor ring and central tube and forms the hydraulic cushion chamber; Described hydraulic cushion chamber is respectively equipped with last hermetically-sealed construction and the lower seal structure that is used for the sealing of hydraulic cushion chamber along the two ends of its length direction, described sealing shroud is that slipper seal cooperates with matching relationship between the restrictor ring.
2. separate layer acid treatment tapping valve according to claim 1; It is characterized in that: the upper and lower end of described central tube is joined adapter sleeve through spiral shell respectively and is provided with the upper and lower joint that is used for the connection of acidifying tubing string; The described block member of going up is top connection; The periphery of described top connection is provided with and is used for the screw fit section that the sealing shroud spiral shell is joined connection; Described sealing shroud pass through the periphery that threaded engagement is sheathed on the screw fit section; The described enclosed construction of going up is the top connection sealing ring that is arranged at respectively between sealing shroud and the top connection and between central tube and the top connection, and described block member down is lower contact, and described enclosed construction down is to be arranged at the place of being slidingly matched of sealing shroud and restrictor ring and the restrictor ring sealing ring that is slidingly matched and locates of restrictor ring and central tube respectively.
3. separate layer acid treatment tapping valve according to claim 1; It is characterized in that: along central tube length direction slidable fit ball seat is arranged in the centre bore of said central tube; Be provided with between said ball seat and the central tube and be used for the fixing pin of ball seat; Be provided with fluid passage between described restrictor ring and the central tube, described pin below has on the central tube tube wall between restrictor ring and the ball seat and is used for acidifying solution is got into fluid passage by central tube outage.
4. separate layer acid treatment tapping valve according to claim 1 is characterized in that: the place of being slidingly matched of described ball seat and central tube is provided with the ball seat sealing ring.
5. separate layer acid treatment tapping valve according to claim 1 is characterized in that: have on the contact end face of described restrictor ring and lower contact and be used for the annular groove that the lower contact inserting is connected.
6. separate layer acid treatment tapping valve according to claim 1 is characterized in that: be provided with the lower contact sealing ring between described lower contact and the central tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120295380 CN202249941U (en) | 2011-08-15 | 2011-08-15 | Layering acidification drain valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120295380 CN202249941U (en) | 2011-08-15 | 2011-08-15 | Layering acidification drain valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202249941U true CN202249941U (en) | 2012-05-30 |
Family
ID=46111200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120295380 Expired - Fee Related CN202249941U (en) | 2011-08-15 | 2011-08-15 | Layering acidification drain valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202249941U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500079A (en) * | 2019-09-19 | 2019-11-26 | 中国石油化工股份有限公司 | More formation acidizing water injection strings |
| CN117231167A (en) * | 2023-11-09 | 2023-12-15 | 四川圣诺油气工程技术服务有限公司 | Releasing structure of acid liquid dumping cylinder |
-
2011
- 2011-08-15 CN CN 201120295380 patent/CN202249941U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500079A (en) * | 2019-09-19 | 2019-11-26 | 中国石油化工股份有限公司 | More formation acidizing water injection strings |
| CN117231167A (en) * | 2023-11-09 | 2023-12-15 | 四川圣诺油气工程技术服务有限公司 | Releasing structure of acid liquid dumping cylinder |
| CN117231167B (en) * | 2023-11-09 | 2024-02-02 | 四川圣诺油气工程技术服务有限公司 | Releasing structure of acid liquid dumping cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20170815 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |