CN202381007U - Floating piston - Google Patents
Floating piston Download PDFInfo
- Publication number
- CN202381007U CN202381007U CN 201120554750 CN201120554750U CN202381007U CN 202381007 U CN202381007 U CN 202381007U CN 201120554750 CN201120554750 CN 201120554750 CN 201120554750 U CN201120554750 U CN 201120554750U CN 202381007 U CN202381007 U CN 202381007U
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- CN
- China
- Prior art keywords
- piston
- mounting groove
- steel ball
- piston rod
- spring
- 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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Abstract
The utility model relates to the technical field of a piston device for petroleum drilling, in particular to a floating piston, comprising a piston body, a piston rod, a piston cap, a pressure regulating ball seat, a compression spring and a spring centralizing head, wherein at least one pressure relief hole is arranged in the middle of the piston cap; the inner sided of the upper end of the piston rod and the outer side of the lower part of the piston cap are fixedly mounted; the inner side of lower end of the piston rod and the outer side of the upper part of the piston body are fixedly mounted; the pressure regulating ball seat is of a step shape with a wider upper part and a narrower lower part; the outer side of the pressure regulating ball seat and the inner side of the upper part of the piston rod are fixedly mounted through a screw thread; and a first steel ball installation groove is arranged on the upper part of the pressure regulating ball seat; the floating piston has a reasonable and compact structure, is convenient to use, and regulates spring force of the compression spring by changing installation position of the pressure regulating ball seat in the piston rod so as to avoid too high pressure of the inner cylinder, reduce rock core resistance when entering the cylinder and safety risk when leaving the core, and improve coring recovery rate.
Description
Technical field
the utility model relates to oil drilling and uses the piston apparatus technical field, is a kind of floating piston.
Background technology
Along with the exploitation day by day in oil field, the stratum that runs into of coring also becomes increasingly complex
, and deep-well, ultradeep well are cored, and high-pressure oil-gas well is cored, unconsolidated formation is cored etc., and the complex situations that in the process of coring, occur are also more and more.When core in deep-well or the higher stratum of strata pressure, rock core inner core pressure is very big, if complex situations such as the stifled hearts, inner core phenomenon will occur building the pressure at well head, forms very big security risk; During sealing core drilling, in case interior tube bottom fills up rock core, sealing fluid will flow out in addition, because sealing fluid has Incoercibility, rock core can not cement out sealing fluid, and follow-up rock core just can't be gone into tube, occurs grinding the heart, influences core recovery.
Summary of the invention
the utility model provides a kind of floating piston; Overcome the deficiency of above-mentioned prior art; Tube bottom fills up rock core and causes follow-up rock core can't go into tube occurring grinding a heart, influence the problem of core recovery in when it can effectively solve the stifled heart of existing apparatus inner core and phenomenon and sealing core drilling occur building the pressure.
The technical scheme of
the utility model realizes through following measure: a kind of floating piston comprises that piston body, piston rod, piston cap, pressure regulate ball seat, compression spring and spring and set upright head; At the middle part of piston cap at least one relief hole is arranged; The outside, bottom inboard and piston cap, the upper end of piston rod is fixedly installed togather; The inboard upper outside with piston body in the lower end of piston rod is fixedly installed togather, and pressure is regulated ball seat and is wide at the top and narrow at the bottom step-like, and the outside of pressure adjusting ball seat and the upper inner of piston rod are fixedly installed togather through screw thread; The first steel ball mounting groove is arranged at the top of regulating ball seat at pressure; In the first steel ball mounting groove, first steel ball is installed, the through hole that communicates with the first steel ball mounting groove is arranged vertically at the bottom of regulating ball seat at pressure, and spring is set upright head and is up-narrow and down-wide step-like; Spring is set upright the lower inside that headgear is contained in piston rod; The top and bottom that are the compression spring that compresses shape are fixedly set in the top that bottom that pressure regulates ball seat and spring are set upright head respectively, and mounting groove on second steel ball is arranged at the bottom of setting upright head at spring, the top that spring is set upright have vertically with second steel ball on the through hole that communicates of mounting groove; Spring is set upright between head and the piston rod has spacing; On the top of piston body mounting groove under second steel ball is arranged, fluted in the bottom of piston body, have vertically on the piston body with second steel ball under the through hole that communicates of mounting groove and groove; Between the mounting groove second steel ball is being installed under the mounting groove on second steel ball and second steel ball, spring is set upright between head and the piston body has spacing.
Be to the further optimization of above-mentioned utility model technical scheme below or/and improve:
The bottom of
above-mentioned first steel ball mounting groove is hexagon wide at the top and narrow at the bottom.
The curved sphere of mounting groove on
above-mentioned second steel ball, the curved sphere of mounting groove under second steel ball, the curved sphere of groove.
above-mentioned piston rod and piston cap can be fixedly installed togather through screw thread, and piston rod and piston body are fixedly installed togather through screw thread.
above-mentioned outside, bottom at piston body can be symmetrically distributed with at least two sealing ring mounting grooves, in each sealing ring mounting groove, sealing ring is installed.
the utility model reasonable and compact in structure; Easy to use; Through the change of the installation site of pressure adjusting ball seat in piston rod, regulate the elastic force size of compression spring, thereby avoided the inner core hypertonia; Reduced and gone into a rock core resistance and go out heart process safe risk, improved core recovery.
Description of drawings
accompanying drawing 1 is looked the sectional structure sketch map for the master of the utility model most preferred embodiment.
Coding in
accompanying drawing is respectively: 1 is piston body, and 2 is piston rod, and 3 is piston cap, and 4 are pressure adjusting ball seat; 5 are the compression spring, and 6 set upright head for spring, and 7 is relief hole, and 8 is the first steel ball mounting groove; 9 is first steel ball, and 10 is through hole, and 11 is mounting groove on second steel ball, and 12 is mounting groove under second steel ball; 13 is groove, and 14 is second steel ball, and 15 is sealing ring.
The specific embodiment
the utility model does not receive the restriction of following embodiment, can confirm concrete embodiment according to the technical scheme and the actual conditions of the utility model.
are in the utility model; For the ease of describing; The description of the relative position relation of each parts all is to describe according to the Butut mode of Figure of description, as: the position relation of forward and backward, upper and lower, left and right etc. is what to confirm according to the Butut direction of Figure of description.
Below in conjunction with embodiment and accompanying drawing the utility model is further described:
shown in accompanying drawing 1, this floating piston comprises that piston body 1, piston rod 2, piston cap 3, pressure regulate ball seat 4, compression spring 5 and spring and set upright 6; At least one relief hole 7 is arranged at the middle part of piston cap 3; The outside, bottom inboard and piston cap 3, the upper end of piston rod 2 is fixedly installed togather; The inboard upper outside with piston body 1 in the lower end of piston rod 2 is fixedly installed togather, and pressure is regulated ball seat 4 and is wide at the top and narrow at the bottom step-like, and the outside of pressure adjusting ball seat 4 and the upper inner of piston rod 2 are fixedly installed togather through screw thread; The first steel ball mounting groove 8 is arranged at the top of regulating ball seat 4 at pressure; First steel ball 9 is installed in the first steel ball mounting groove 8, and the through hole 10 that communicates with the first steel ball mounting groove 8 is arranged vertically at the bottom of regulating ball seat 4 at pressure, and spring is set upright 6 and is up-narrow and down-wide step-like; Spring set upright 6 be sleeved on piston rod 2 lower inside; The top and bottom that are the compression spring 5 that compresses shape are fixedly set in pressure respectively and regulate bottom and the spring of ball seat 4 and set upright 6 top, and setting upright a bottom of 6 at spring has mounting groove 11 on second steel ball, spring set upright 6 top have vertically with second steel ball on the through hole 10 that communicates of mounting groove 11; Spring set upright 6 and piston rod 2 between spacing is arranged; On the top of piston body 1 mounting groove 12 under second steel ball is arranged, fluted 13 in the bottom of piston body 1, have vertically on the piston body 1 with second steel ball under the through hole 10 that communicates of mounting groove 12 and groove 13; Second steel ball 14 is being installed between the mounting groove 12 under the mounting groove 11 on second steel ball and second steel ball, spring set upright 6 and piston body 1 between spacing is arranged.Like this, pressure is regulated the appropriate location that ball seat 4 can be fixedly mounted on piston rod 2 upper inner, regulates the elastic force size of compression spring 5.During use, pressure is regulated ball seat 4 be fixedly mounted on the appropriate location in the piston rod 2 through screw thread, pressure is regulated ball seat 4 extruding compression springs 5; Compression spring 5 extrusion springs set upright 6 make second steel ball 14 and pressing spring set upright 6 and piston body 1 between seal, thereby inner core external and internal pressure difference is controlled at the scope of setting through elastic force, avoid the inner core hypertonia; Reduce the risk in the heart process, the sealing fluid behind the stifled simultaneously heart flows out from relief hole 7, reduces and goes into a rock core resistance; Reduce core grinding; Reach the purpose that ensures core recovery, piston body 1 has the core function of ball seat of routine simultaneously, can use separately.
Can according to actual needs above-mentioned floating piston be done further to optimize or/and improve:
shown in accompanying drawing 1, as required, the bottom of the first steel ball mounting groove 8 is hexagon wide at the top and narrow at the bottom.
shown in accompanying drawing 1, mounting groove 11 curved spheres on second steel ball, mounting groove 12 curved spheres under second steel ball, groove 13 curved spheres.Like this, be convenient to and 14 sealings of second steel ball.
Shown in accompanying drawing 1, piston rod 2 and piston cap 3 are fixedly installed togather through screw thread
, and piston rod 2 and piston body 1 are fixedly installed togather through screw thread.Like this, be convenient to installation and removal.
are symmetrically distributed with at least two sealing ring mounting grooves in the outside, bottom of piston body 1 shown in accompanying drawing 1, in each sealing ring mounting groove, sealing ring 15 is installed.Like this, be convenient to sealing.
above technical characterictic has constituted the most preferred embodiment of the utility model, and it has stronger compliance and best implementation result, can increase and decrease non-essential technical characterictic according to actual needs, satisfies the demand of different situations.
Claims (9)
1. floating piston is characterized in that comprising that piston body, piston rod, piston cap, pressure regulates ball seat, compression spring and spring and set upright head; At the middle part of piston cap at least one relief hole is arranged; The outside, bottom inboard and piston cap, the upper end of piston rod is fixedly installed togather; The inboard upper outside with piston body in the lower end of piston rod is fixedly installed togather, and pressure is regulated ball seat and is wide at the top and narrow at the bottom step-like, and the outside of pressure adjusting ball seat and the upper inner of piston rod are fixedly installed togather through screw thread; The first steel ball mounting groove is arranged at the top of regulating ball seat at pressure; In the first steel ball mounting groove, first steel ball is installed, the through hole that communicates with the first steel ball mounting groove is arranged vertically at the bottom of regulating ball seat at pressure, and spring is set upright head and is up-narrow and down-wide step-like; Spring is set upright the lower inside that headgear is contained in piston rod; The top and bottom that are the compression spring that compresses shape are fixedly set in the top that bottom that pressure regulates ball seat and spring are set upright head respectively, and mounting groove on second steel ball is arranged at the bottom of setting upright head at spring, the top that spring is set upright have vertically with second steel ball on the through hole that communicates of mounting groove; Spring is set upright between head and the piston rod has spacing; On the top of piston body mounting groove under second steel ball is arranged, fluted in the bottom of piston body, have vertically on the piston body with second steel ball under the through hole that communicates of mounting groove and groove; Between the mounting groove second steel ball is being installed under the mounting groove on second steel ball and second steel ball, spring is set upright between head and the piston body has spacing.
2. floating piston according to claim 1 is characterized in that the bottom of the first steel ball mounting groove is hexagon wide at the top and narrow at the bottom.
3. floating piston according to claim 1 and 2 is characterized in that the curved sphere of mounting groove on second steel ball, the curved sphere of mounting groove under second steel ball, the curved sphere of groove.
4. floating piston according to claim 1 and 2 is characterized in that piston rod and piston cap are fixedly installed togather through screw thread, and piston rod and piston body are fixedly installed togather through screw thread.
5. floating piston according to claim 3 is characterized in that piston rod and piston cap are fixedly installed togather through screw thread, and piston rod and piston body are fixedly installed togather through screw thread.
6. floating piston according to claim 1 and 2 is characterized in that the outside, bottom of piston body is symmetrically distributed with at least two sealing ring mounting grooves, in each sealing ring mounting groove, sealing ring is installed.
7. floating piston according to claim 3 is characterized in that the outside, bottom of piston body is symmetrically distributed with at least two sealing ring mounting grooves, in each sealing ring mounting groove, sealing ring is installed.
8. floating piston according to claim 4 is characterized in that the outside, bottom of piston body is symmetrically distributed with at least two sealing ring mounting grooves, in each sealing ring mounting groove, sealing ring is installed.
9. floating piston according to claim 5 is characterized in that the outside, bottom of piston body is symmetrically distributed with at least two sealing ring mounting grooves, in each sealing ring mounting groove, sealing ring is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120554750 CN202381007U (en) | 2011-12-27 | 2011-12-27 | Floating piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120554750 CN202381007U (en) | 2011-12-27 | 2011-12-27 | Floating piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202381007U true CN202381007U (en) | 2012-08-15 |
Family
ID=46629520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120554750 Expired - Fee Related CN202381007U (en) | 2011-12-27 | 2011-12-27 | Floating piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202381007U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952405A (en) * | 2016-06-30 | 2016-09-21 | 中国石油集团西部钻探工程有限公司 | Floating piston device for coring |
| CN108266146A (en) * | 2018-01-03 | 2018-07-10 | 中国石油集团西部钻探工程有限公司 | The quick coring apparatus of oil drilling |
-
2011
- 2011-12-27 CN CN 201120554750 patent/CN202381007U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952405A (en) * | 2016-06-30 | 2016-09-21 | 中国石油集团西部钻探工程有限公司 | Floating piston device for coring |
| CN105952405B (en) * | 2016-06-30 | 2018-06-26 | 中国石油集团西部钻探工程有限公司 | It cores and uses float piston device |
| CN108266146A (en) * | 2018-01-03 | 2018-07-10 | 中国石油集团西部钻探工程有限公司 | The quick coring apparatus of oil drilling |
| CN108266146B (en) * | 2018-01-03 | 2024-03-12 | 中国石油天然气集团有限公司 | Quick coring device for petroleum drilling |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120815 Termination date: 20201227 |