CN203730457U - Liquid-locking-resisting piston mechanism - Google Patents
Liquid-locking-resisting piston mechanism Download PDFInfo
- Publication number
- CN203730457U CN203730457U CN201420038061.2U CN201420038061U CN203730457U CN 203730457 U CN203730457 U CN 203730457U CN 201420038061 U CN201420038061 U CN 201420038061U CN 203730457 U CN203730457 U CN 203730457U
- Authority
- CN
- China
- Prior art keywords
- piston
- axle
- liquid lock
- liquid
- piston mechanism
- 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.)
- Withdrawn - After Issue
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Abstract
The utility model relates to a liquid-locking-resisting piston mechanism which is characterized in that a mandrel, a piston, a lower sleeve, a spring and an end cap are included, the piston is arranged outside the mandrel in a sleeved mode, the lower end of the piston is connected with the upper end of the lower sleeve, the lower end of the lower sleeve is connected with the lower end of the mandrel, a cavity and a spring are arranged between the lower sleeve and the mandrel, a plurality of sealing rings which achieve sealing of a piston mechanism inner cavity and outer space are arranged between the upper end of the piston and the mandrel, a middle sealing ring is arranged between the upper end of the lower sleeve and the lower end of the piston, and the sealing size between the upper end of the piston and the mandrel and the sealing size of the lower end of the piston and the lower sleeve are equal. The liquid-locking-resisting piston mechanism has the advantages that during a piston-up-down-motion process, the risk of piston liquid locking cannot happen, piston liquid-locking-resisting capacity can be greatly improved, effectiveness of up-down moving of the piston is guaranteed, and working potential safety hazards are avoided.
Description
Technical field
The utility model belongs to oil gas drilling technical field, particularly relates to a kind of anti-liquid lock piston mechanism.
Background technique
At present, most of downhole petroleum instrument, need to suppress realize action substantially all adopt inner-cavity structure in the form of piston, this structure exists security risk, once will there is the phenomenon of liquid lock in physical dimension the problems in the design, make the piston structure in instrument cannot move or move not in place.In order to make up above-mentioned deficiency, common way is the object that relief hole, equalizing orifice are set on piston cylinder outer wall reach balance pressure.But the mode of taking to arrange relief hole, equalizing orifice on piston cylinder outer wall not only can affect the intensity of instrument itself, but also likely cause solid particle entering tool part inner chamber in well, cause piston mechanism cannot move or move the potential safety hazard such as not in place.
Model utility content
The utility model is for solving the technical problem existing in known technology and provide a kind of and improve the anti-liquid lock of piston ability, ensure piston and move up and down validity and can realize the anti-liquid lock piston mechanism of safe and reliable operation.
The technological scheme that the utility model is taked for the technical problem existing in solution known technology is:
Anti-liquid lock piston mechanism, it is characterized in that: comprise axle, piston, trap, spring and plug, described axle outer cover is equipped with piston, Yu Xia set upper side, described piston lower end suit connects, the described lower end of trapping is connected with axle lower end, described trap and axle between be provided with cavity, spring is housed in cavity, the seal ring of realizing the sealing of piston mechanism inner chamber and the external space is housed between described piston upper end and axle; The middle part seal ring of realizing piston mechanism inner chamber and external space sealing is housed between described lower set upper side and piston lower end; Closure size between described piston upper end and axle equates with the closure size between trapping with piston lower end.
The utility model can also adopt following technological scheme:
Between described piston lower end and axle, be provided with at piston and move up and down the wear-resistant belt that can play righting and wear-resisting effect in process.
Described piston lower end be shaped with for link up the space between piston and axle and trap and axle between space can realize the through hole of hydraulic oil circulation.
Under described, put the oil hole that is provided with mechanism's inner chamber oiling after ease of assembly, plug is installed after oiling, described oil hole is by plug shutoff.
In described axle, be shaped with the step for moving mechanical position limitation on piston.
Advantage and the good effect that the utlity model has are: because the utility model adopts technique scheme, anti-liquid lock piston mechanism by being equipped with the seal ring of realizing piston mechanism inner chamber and external space sealing between piston upper end and axle, the middle part seal ring of realizing piston mechanism inner chamber and external space sealing is housed between lower set upper side and piston lower end, and the closure size between piston upper end and axle and piston lower end equate with the closure size between trapping, and then can be in the process of the upper and lower action of piston, can there is not the risk of piston liquid lock.In the time moving on piston, the hydraulic oil between piston and axle by through hole flow into trap and axle between space, can not occur because liquid lock piston cannot on the situation of moving; In the time that piston moves down, trap and axle between hydraulic oil flow into the space between piston and axle by through hole, can not occur because the situation that liquid lock piston cannot move down.Can increase substantially the anti-liquid lock of piston ability, ensure the validity that piston moves up and down, avoid occurring job safety hidden danger.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model; (shown in figure, being piston raised state)
Fig. 2 is that piston of the present utility model moves down status architecture schematic diagram.
In figure: 1, upper sealing gasket; 2, piston; 2-1, manhole; 3, middle part seal ring; 4, wear-resistant belt; 5, trap; 6, plug; 7, spring; 8, axle; 8-1, step.
Embodiment
For further understanding model utility content of the present utility model, Characteristic, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1 and Fig. 2, anti-liquid lock piston mechanism, comprises axle 8, piston 2, traps 5, spring 7 and plug 6, described axle outer cover is equipped with piston, and Yu Xia set upper side, described piston lower end suit connects, described in the lower end of trapping be connected with axle lower end by screw thread.Described trap and axle between be provided with cavity, spring 7 is housed in cavity, piston is withstood in spring upper end, spring lower end is withstood and is trapped.
The upper sealing gasket 1 of realizing piston mechanism inner chamber and external space sealing is housed between described piston upper end and axle; The middle part seal ring 3 of realizing piston mechanism inner chamber and external space sealing is housed between described lower set upper side and piston lower end; Closure size between described piston upper end and axle equates with the closure size between trapping with piston lower end.Like this can be in the process of the upper and lower action of piston, solved generation liquid lock risk, when move on piston, the hydraulic oil between piston and axle by through hole flows into trap and axle between space, avoid occurring because of liquid lock piston cannot on the situation of moving; In the time that piston moves down, trap and axle between hydraulic oil flow into the space between piston and axle by through hole, place and occur because the situation that liquid lock piston cannot move down.
In the present embodiment, described piston lower end be shaped with for link up the space between piston and axle and trap and axle between space realize the through hole of hydraulic oil circulation, described through hole is preferably manhole 2-1.
In the present embodiment, put the oil hole that is provided with mechanism's inner chamber oiling after ease of assembly under described, plug 6 is installed after oiling.
In the present embodiment, be provided with at piston and move up and down the wear-resistant belt 4 that can play righting and wear-resisting effect in process between described piston lower end and axle, described wear-resistant belt adopts polythene material to make.
In the present embodiment, in described axle, be shaped with the step 8-1 for moving mechanical position limitation on piston.
Adopt the operating method of anti-liquid lock piston mechanism:
As shown in Figure 1, in the time that piston 2 upper-end surface external force do not exist, spring 7 resets and expands, when piston moves under the effect of spring force, between piston upper end and axle 8, realize the sealing of piston mechanism inner chamber and the external space by upper sealing gasket 1, realize the sealing of piston mechanism inner chamber and the external space simultaneously by the middle part seal ring 3 between lower set upper side and piston lower end.
In the time that piston starts upper movement and does, because the closure size between piston upper end and axle equates with the closure size between trapping with piston lower end, on piston, move the volume space of causing between piston and axle reducing and trap and axle between the volume that increases of space equate, now the hydraulic oil between piston and axle by through hole flow into trap and axle between space, therefore can not occur because liquid lock piston cannot on the situation of moving, in the time moving on to axle step on piston, on it, mobile work stops.
As shown in Figure 2, in the time that piston upper-end surface is tried hard to recommend the situation under trend outside, spring is compressed, between piston upper end and axle, realize the sealing of piston mechanism inner chamber and the external space by upper sealing gasket, descend the sealing that realizes piston mechanism inner chamber and the external space between set upper side and piston lower end by middle part seal ring simultaneously.
When piston starts to move down action, because the closure size between piston upper end and axle equates with the closure size between trapping with piston lower end, piston move down cause trap and axle between space reduce volume and piston and axle between space increase volume equate, now trap and axle between hydraulic oil flow into the space between piston and axle by through hole, can not occur because the situation that liquid lock piston cannot move down.In the time that spring-compressed power is consistent with downward thrust, piston stops moving down action.
In 20 DEG C of situations of normal temperature, because closure size and piston lower end between this anti-liquid lock piston mechanism piston upper end and axle equate with the closure size between trapping, therefore can be in the process of the upper and lower action of piston, can there is not liquid lock risk, can increase substantially the anti-liquid lock of piston ability, ensure the validity that piston moves up and down.
The embodiment that the utility model accompanying drawing is described is exemplary, only for explaining the utility model, and can not be interpreted as restriction of the present utility model.
Claims (5)
1. an anti-liquid lock piston mechanism, it is characterized in that: comprise axle, piston, trap, spring and plug, described axle outer cover is equipped with piston, Yu Xia set upper side, described piston lower end suit connects, the described lower end of trapping is connected with axle lower end, described trap and axle between be provided with cavity, spring is housed in cavity, the seal ring of realizing the sealing of piston mechanism inner chamber and the external space is housed between described piston upper end and axle; The middle part seal ring of realizing piston mechanism inner chamber and external space sealing is housed between described lower set upper side and piston lower end; Closure size between described piston upper end and axle equates with the closure size between trapping with piston lower end.
2. anti-liquid lock piston mechanism according to claim 1, is characterized in that: between described piston lower end and axle, be provided with at piston and move up and down the wear-resistant belt that can play righting and wear-resisting effect in process.
3. anti-liquid lock piston mechanism according to claim 1, is characterized in that: described piston lower end be shaped with for link up the space between piston and axle and trap and axle between space can realize the through hole of hydraulic oil circulation.
4. anti-liquid lock piston mechanism according to claim 1, is characterized in that: under described, put the oil hole that is provided with mechanism's inner chamber oiling after ease of assembly, described oil hole is by plug shutoff.
5. anti-liquid lock piston mechanism according to claim 1, is characterized in that: in described axle, be shaped with the step for moving mechanical position limitation on piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420038061.2U CN203730457U (en) | 2014-01-21 | 2014-01-21 | Liquid-locking-resisting piston mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420038061.2U CN203730457U (en) | 2014-01-21 | 2014-01-21 | Liquid-locking-resisting piston mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203730457U true CN203730457U (en) | 2014-07-23 |
Family
ID=51200535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420038061.2U Withdrawn - After Issue CN203730457U (en) | 2014-01-21 | 2014-01-21 | Liquid-locking-resisting piston mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203730457U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790893A (en) * | 2014-01-21 | 2014-05-14 | 中国海洋石油总公司 | Anti-liquid-locking piston mechanism |
-
2014
- 2014-01-21 CN CN201420038061.2U patent/CN203730457U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790893A (en) * | 2014-01-21 | 2014-05-14 | 中国海洋石油总公司 | Anti-liquid-locking piston mechanism |
| CN103790893B (en) * | 2014-01-21 | 2016-03-30 | 中国海洋石油总公司 | liquid-proof lock piston mechanism |
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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: 20140723 Effective date of abandoning: 20160330 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |