CN203035176U - Negative pressure flowback converter - Google Patents
Negative pressure flowback converter Download PDFInfo
- Publication number
- CN203035176U CN203035176U CN 201220701201 CN201220701201U CN203035176U CN 203035176 U CN203035176 U CN 203035176U CN 201220701201 CN201220701201 CN 201220701201 CN 201220701201 U CN201220701201 U CN 201220701201U CN 203035176 U CN203035176 U CN 203035176U
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- CN
- China
- Prior art keywords
- piston
- central tube
- converter
- negative pressure
- piston bush
- 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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- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Abstract
The utility model discloses a negative pressure flowback converter which comprises a central tube and a piston bush which are mutually sleeved in an inside-outside mode. A piston cavity is formed between the central tube and the piston bush after the central tube and the piston bush are mutually sleeved. A piston is arranged in the piston cavity. The central tube is provided with a through hole used for communicating the piston cavity and the interior of the central tube. The piston bush is also provided with a through hole used for communicating the piston cavity and the outer side of the piston bush. The upper end of the central tube is connected with the inner side of an upper joint, and the upper end of the piston bush is connected with the outer side of the upper joint. A spring is arranged at the upper end of the piston, and the upper end face of the spring abuts against the lower end face of the upper joint. A lower joint is connected with the lower portion of the through hole which is formed in the piston bush. The upper end of the inner circumference of the lower joint is a circular conical surface. A sealing ring with a circular conical surface is arranged at the lower end of the piston. The two circular conical surfaces are the same in conical degree. The negative pressure flowback converter can achieve the purpose that high-pressure power liquid enters a lower concentric dual-pipe mechanism through an oil jacket in an annulus mode, opens the piston of the converter under lower pressure, reduces invalid throttling losses, effectively isolates the high-pressure power liquid and the low-pressure mixed liquor, and achieves conventional acid liquor injection and examining seal.
Description
Technical field
The utility model relates to oil exploitation underground work instrument, specifically a kind of be applicable to shake out, negative pressure that the general negative pressure in oil-water well stratum of acidizing treatment is returned among the row returns row's converter.
Background technology
Easily the sand output well stratum is loose, and the free sand of conventional sand control treatment is detained the stratum, easily spues and sand pipe laying post after the operation; The residual acid in stratum can not effectively be discharged behind the acidizing treatment, and inactivation easily reacts the generation sediment, and secondary pollution is caused on the stratum.The discharge method that returns commonly used has mixed gas to return row and pumping method.Mixed gas returns to be lined up higherly, and has potential safety hazard; Pumping method efficient is low and pumping capacity is low.
Nowadays, anti-circulation hydraulic negative pressure returns that row's technology pumping capacity is strong, safe and reliable, operation is simple, and the important component part that negative pressure is returned the comb post is converter, but present converter effect is undesirable.
In view of this, at the problems referred to above, propose a kind of negative pressure reasonable in design and that effectively improve above-mentioned disappearance and return row's converter.
Summary of the invention
The purpose of this utility model is to provide negative pressure to return row's converter, it is the important component part that negative pressure is returned the comb post, connection and the partition of oil pipe interior or exterior space by the switch of pressure control converter are realized turning to of power fluid, auxiliaryly finish anti-circulation hydraulic negative pressure and return row and annotate acid and test envelope.
In order to reach above-mentioned purpose, the utility model has adopted following technical scheme, negative pressure is returned row's converter, the central tube that is nested inside and outside comprising and piston bush, and form annular space after being nested between the two, this annular space is as plunger shaft, the piston of packing in the plunger shaft, described central tube is offered the plunger shaft that through hole is communicated with central tube inside and piston top, and described piston bush is also offered through hole and is communicated with the plunger shaft of piston below and the space of the oil well casing outside the piston bush.
Be connected the inboard of top connection on the described central tube by engage thread, described piston bush upper end is connected the outside of top connection by engage thread.
Described piston upper end is provided with spring, and the upper surface of this spring withstands on the lower surface of top connection.
The lower position that described piston bush is offered through hole is connected with lower contact, and this lower contact inner periphery upper end is designed for taper seat, and described piston lower end is provided with the joint ring of band taper seat, and above-mentioned two taper seat taperings are identical.
Described piston lower end also is provided with pressure ring, and described seal ring set is in the pressure ring outside.
Inboard, described central tube lower end is connected with inner central tube downwards.
Described inner central tube passes lower contact downwards until connecting to live packer always.
Compared to prior art, the utlity model has following beneficial effect:
This converter is that high voltage power liquid changes the also isolated high voltage power liquid of bottom concentric double pipe mechanism over to by the oil jacket annular space and negative pressure is returned the pith that row forms the low pressure mixed liquor, plays a part to connect and carrying 1.900TBG oil pipe weight.According to energy-conservation principle, design designs elastic force than little spring, the piston that lifting surface area is big than the valve piston opening pressure for this reason.The inner central tube design length is longer, directly passes during installation and the direct-connected packer of converter, has avoided the 1.900TBG tubing nipple to form little annular space in packer and has held back area and increase the local hydraulic loss.
1, realizes that high voltage power liquid enters bottom concentric double pipe mechanism by the oil jacket annular space; 2, low opening pressure is opened the converter piston, reduces invalid restriction loss; 3, effectively isolated high voltage power liquid and low pressure mixed liquor; 4, auxiliary realization is just being annotated acid solution and is being tested envelope.
Description of drawings
Fig. 1 returns the structural representation of row's converter for the utility model negative pressure;
Fig. 2 returns row's converter application is returned the comb post in negative pressure application schematic diagram for the utility model negative pressure.
Among the figure: the 1-top connection; The 2-piston bush; The 3-central tube; The 4-spring; The 5-piston; The 6-pressure ring; The 7-joint ring; The 8-lower contact; The 9-inner central tube;
The 100-converter; The 200-packer; The 300-negative pressure is returned row's instrument; The 400-plug.
The specific embodiment
Relevant detailed description of the present utility model and technology contents, conjunction with figs. is described as follows, however accompanying drawing only provides the usefulness of reference with explanation, and the utility model is limited.
Referring to accompanying drawing 1, negative pressure is returned row's converter, and top connection 1 is connected with the top oil pipe.Spring 4 promotes piston 5 and guarantees the initial closed condition that is in of converter.Piston bush 2, central tube 3, lower contact 8 form unidirectional hydraulic control system with piston 5, joint ring 7, and the conversion of symmetrical distribution hole is arranged on the piston bush 2.Central tube 3 be connected inner central tube 9 tapered threads and connect, outer fluid also plays and hangs bottom little oil pipe effect in the isolated oil pipe, inner central tube 9 design lengths are longer, directly pass during installation and the direct-connected packer of converter.Lower contact 8 links to each other with lower tool.
Fluid diversion: it is up and open converter that anti-circulation time conversion hole pressure transmission promotes piston 5, high voltage power liquid enters the annular space that 1.900TBG oil pipe and instrument (3 1/2TBG oil pipe) form through the conversion hole, finally enter negative pressure and return row's instrument nozzle generation underbalance effect, the pumping formation fluid enters the 1.900TBG oil pipe and returns through converter inner central tube 9, top oil pipe and drain into ground, realizes that negative pressure returns row.
Auxiliary acidifying: on the central tube 3 pressure transmission hole is arranged, downforce on the dummy piston 5 when just suppressing guarantees that converter is in to close that acid solution is just annotated during acidizing treatment, enters negative pressure through oil pipe, converter inner central tube 9 and returns row's instrument, flows into the stratum.
Assist and test envelope: open sleeve valve, inject with the clear water forward, converter is in closed condition, observes sleeve valve and whether returns liquid, illustrate that packer setting is not good if do not return liquid, otherwise packer loses efficacy.
As accompanying drawing 2, this tool performance is described, the tubing string chief component of this tool applications is: converter 100; Packer 200; Negative pressure is returned row's instrument 300; Plug 400.Instrument connected mode from bottom to top is: plug connects negative pressure and returns row's instrument (guarantee that negative pressure return row's instrument intake and be fit to the position at the purpose reservoir) lower contact, negative pressure is returned the top connection of row's instrument and is connected the 3 1/2TBG tubing nipples of adjusting the degree of depth, and tubing nipple top connects the high pressure packer; Negative pressure is returned row's instrument sealing plug and is connected the 1.900TBG tubing nipple that is fit to length, and pipe nipple top is connected with the converter inner central tube, guarantees that sealing plug puts in place, connects converter lower contact and packer top connection.The converter top connection connects oil pipe to well head.
The above only is preferred embodiment of the present utility model, and non-in order to limit claim of the present utility model, other use the equivalence of patent spirit of the present utility model to change, and all should all belong to claim of the present utility model.
Claims (7)
1. negative pressure is returned row's converter, it is characterized in that, the central tube that is nested inside and outside comprising and piston bush, and form annular space after being nested between the two, this annular space is as plunger shaft, the piston of packing in the plunger shaft, described central tube are offered through hole and are communicated with the inner plunger shaft with the piston top of central tube, and described piston bush is also offered the space of the oil well casing outside plunger shaft that through hole is communicated with the piston below and the piston bush.
2. negative pressure according to claim 1 is returned row's converter, it is characterized in that, is connected the inboard of top connection on the described central tube by engage thread, and described piston bush upper end is connected the outside of top connection by engage thread.
3. negative pressure according to claim 2 is returned row's converter, it is characterized in that, described piston upper end is provided with spring, and the upper surface of this spring withstands on the lower surface of top connection.
4. negative pressure according to claim 1 is returned row's converter, it is characterized in that the lower position that described piston bush is offered through hole is connected with lower contact, this lower contact inner periphery upper end is designed for taper seat, described piston lower end is provided with the joint ring of band taper seat, and above-mentioned two taper seat taperings are identical.
5. negative pressure according to claim 4 is returned row's converter, it is characterized in that, described piston lower end also is provided with pressure ring, and described seal ring set is in the pressure ring outside.
6. negative pressure according to claim 1 is returned row's converter, it is characterized in that, inboard, described central tube lower end is connected with inner central tube downwards.
7. negative pressure according to claim 6 is returned row's converter, it is characterized in that, described inner central tube passes lower contact downwards until connecting to live packer always.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220701201 CN203035176U (en) | 2012-12-18 | 2012-12-18 | Negative pressure flowback converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220701201 CN203035176U (en) | 2012-12-18 | 2012-12-18 | Negative pressure flowback converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203035176U true CN203035176U (en) | 2013-07-03 |
Family
ID=48687309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220701201 Expired - Fee Related CN203035176U (en) | 2012-12-18 | 2012-12-18 | Negative pressure flowback converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203035176U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105672976A (en) * | 2014-11-20 | 2016-06-15 | 中国石油化工股份有限公司 | Acidizing, negative-pressure and flowback integrated equipment and technology |
-
2012
- 2012-12-18 CN CN 201220701201 patent/CN203035176U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105672976A (en) * | 2014-11-20 | 2016-06-15 | 中国石油化工股份有限公司 | Acidizing, negative-pressure and flowback integrated equipment and technology |
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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: 20130703 Termination date: 20151218 |
|
| EXPY | Termination of patent right or utility model |