CN204002708U - A kind of shock resistance pressure bearing device - Google Patents
A kind of shock resistance pressure bearing device Download PDFInfo
- Publication number
- CN204002708U CN204002708U CN201420297941.1U CN201420297941U CN204002708U CN 204002708 U CN204002708 U CN 204002708U CN 201420297941 U CN201420297941 U CN 201420297941U CN 204002708 U CN204002708 U CN 204002708U
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- China
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- bearing device
- pressure bearing
- device body
- piston ring
- annular space
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Abstract
The utility model discloses a kind of shock resistance pressure bearing device, comprise pressure bearing device body, piston ring and lower contact; Pressure bearing device body is hollow tubular structure, and its bottom internal diameter shrinks to accept the blanking plug of taking a seat, and its upper end and waist arrange respectively screw thread, are used for connecting upper tube rod structure and lower contact, and lower contact lower end arranges screw thread to connect bottom tubing string; Pressure bearing device body lower outside and and the inner side of the lower contact middle and lower part tubular column structure that is connected of pressure bearing device body between form an annular space; Within the piston ring that is fixed on pressure bearing device body lower, outer perimeter by shear pin is positioned at described annular space, piston ring and the sealing of described annular space mineralization pressure; The position that pressure bearing device body is positioned on piston ring arranges multiple circulation ports, communicates with the annular space on piston ring.The utility model can be realized recycling in tubing string, and shock resistance, is not subject to circulation row quantitative limitation, also can avoid shear pin to shear in advance the problem that maybe can not shear.
Description
Technical field
The present invention relates to a kind of downhole tool of petroleum industry, be specifically related to a kind of shock resistance pressure bearing device.
Background technology
In oil exploitation site operation, often need to carry out liquid-circulating operation.In the pilot process of circulation, sometimes need to drop into ball or plug class blanking plug, be located in the pressure bearing device of certain position, down-hole, temporary plugging central tube endoporus, thus reach the object of utilizing hydraulic operation downhole tool.After EO, in order to reach the requirement that continues circulation, require pressure bearing device must be designed with movable pedestal, under certain hydraulic action, pressure bearing device can discharge, and realizes recycling.In construction, for horizontal well or other special wells, drop into after blanking plug at the scene, blanking plug can not lean on free gravity to fall or need and assist, and on-the-spot general by the way of turn on pump circulating fluid, i.e. pumping, sends to pressure bearing device by blanking plug.In the time that blanking plug arrives the pedestal of pressure bearing device, inner tube circulation moment closes, and the fluid column of whole interior tubing string can form a huge forward impact power (inertia force) to pressure bearing device.
Conventional pressure bearing device at present, mainly contains fixing pressure bearing device and two kinds of forms of activity pressure bearing device.Fixing pressure bearing device is to be fixedly connected on the structure between upper lower tubular column by screw thread, directly connect, after blanking plug is taken a seat, impact force suffered upper surface analysis can be transferred on tubing string, tubing string can sustain this strength, meets the requirement of anti-liquid-column impingement, once but blanking plug be seated in pressure bearing device, can not realize recycling, can not meet the construction requirement of recycling.
Existing activity pressure bearing device body is connected with upper lower tubular column by screw thread, then within pedestal being fixed on to the body construction of pressure bearing device by some shear pins, after being seated within pedestal by the blanking plug of gravity or pumping, the endoporus of temporary transient shutoff central tube; EO, applies downward hydraulic coupling shear pin is cut off and discharged pressure bearing device pedestal from ground.But there is following defect in such activity pressure bearing device: the 1. quantity of pressure bearing device design and installation shear pin is that the piston force producing according to the upper and lower differential static pressure of pressure bearing device calculates, and does not consider the dynamic impact forces of fluid column motion; 2. the enormous impact power that above-mentioned pressure bearing device occurs after taking a seat, may cause the shear pin of pedestal and body to be cut off in advance because bearing incessantly this impact force, pressure bearing device pedestal is discharged in advance, do not reach needed force value, the object that does not have shutoff central tube and carry out underground work; 3. ground is to judge to ground pressure table situation that blanking plug takes a seat by pressure-wave emission, because compression wave has certain spread speed (compressibility of liquid causes), if well is deep, in the time that the pressure rising of fluid column moment cut-off generation is not also delivered to ground pressure table, if shear pin moment is cut off, the pressure reduction producing due to cut-off disappears, ground pressure table will not have stress reaction, in construction, will show that blanking plug does not arrive the analysis conclusion of pressure bearing device, the erroneous judgement that brings blanking plug not take a seat to construction.For the above-mentioned defect of current activity pressure bearing device, if in order to improve activity pressure bearing device impact resistance, can sustain above-mentioned impact force by the quantity that increases shear pin in design.But because this impact force is instant impact, when liquid motion in tubing string is once stop causing that this impact force disappears, ground pump truck just need to improve liquid column hydrostatic pressure and shear pin could be cut off, will bring risk to safe construction if at this moment liquid column hydrostatic pressure is excessive, once reach safety margins so work as liquid column hydrostatic pressure, if shear pin can't be cut off, the problem that there will be pedestal to discharge, can not meet the construction requirement of recycling equally.
In sum, there is the deficiency of self in existing pressure bearing device, can not meet on-the-spot recycling and shock proof dual needs, is therefore necessary prior art to improve.
Summary of the invention
The deficiency existing in order to overcome prior art, the object of the present invention is to provide a kind of shock resistance pressure bearing device, not only can meet temporary plugging central tube in operation process and manage the needs of interior pressurization, and can shock resistance and recycling, can also accurately judge the situation that blanking plug is taken a seat.
In order to realize foregoing invention object, the technical solution used in the present invention is as follows:
A kind of shock resistance pressure bearing device, is characterized in that, comprises pressure bearing device body, piston ring and lower contact; Pressure bearing device body is hollow tubular structure, and its bottom internal diameter shrinks to accept the blanking plug of taking a seat, and its upper end and waist arrange respectively screw thread, are used for connecting upper tube rod structure and lower contact; Pressure bearing device body lower outside and and the inner side of the lower contact middle and lower part tubular column structure that is connected of pressure bearing device body between form an annular space; Within the piston ring that is fixed on pressure bearing device body lower, outer perimeter by shear pin is positioned at described annular space, piston ring and the sealing of described annular space mineralization pressure; The position that pressure bearing device body is positioned on piston ring arranges multiple circulation ports, to be communicated with the annular space on the intrinsic hollow tube of pressure bearing device and piston ring.
Further, described pressure bearing device body upper end screw thread is positioned at the inwall of described hollow tubular structure, is connected with upper tube male screw; Pressure bearing device body waist screw thread is positioned at the periphery of described hollow tubular structure, is threaded with lower contact upper end, and lower contact lower end is connected with bottom tubing string by screw thread.
Beneficial effect of the present invention comprise following some:
1) not only can realize recycling problem in tubing string, and shock resistance, be not subject to circulation row quantitative limitation.
2) the impact forces major part that while being located in the undergauge place of hollow tube lower end by blanking plug, moment causes acts on tubing string, pressure control valve is the impact that piston ring is not subject to instant impact, pressure precise control, can avoid shear pin to shear in advance the problem that maybe can not shear.
Brief description of the drawings
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Fig. 1: the activity pressure bearing device structural representation of prior art
Fig. 2: shock resistance pressure bearing device structural representation of the present invention.
In figure: 1-pressure bearing device body; 2-piston ring; 3-annular space; 4-shear pin; 5-circulation port; 6-pressure bearing device body upper end screw thread; 7-top tubing string; 8-pressure bearing device body waist screw thread; 9-lower contact; 10-bottom tubing string.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further illustrated.
As shown in Figure 2, shock resistance pressure bearing device provided by the present invention, comprises pressure bearing device body 1, piston ring 2 and lower contact 9; Pressure bearing device body 1 is hollow tubular structure, and its bottom internal diameter shrinks to accept the blanking plug of taking a seat, and its upper end and waist arrange respectively screw thread 6 and screw thread 8, are used for connecting upper tube rod structure 7 and lower contact; Pressure bearing device body 1 lower outside and and the inner side of the lower contact 9 middle and lower part tubular column structures that are connected of pressure bearing device body 1 between form an annular space 3; Within the piston ring 2 that is fixed on pressure bearing device body 1 lower, outer perimeter by shear pin 4 is positioned at described annular space 3, piston ring and the 3 mineralization pressures sealings of described annular space; The pipe wall position that pressure bearing device body 1 is positioned on piston ring 2 arranges multiple circulation ports 5, to be communicated with the annular space 3 on hollow tube and the piston ring 2 in pressure bearing device body 1.
Described pressure bearing device body 1 upper end screw thread 6 is positioned at the inner side of described hollow tubular structure, is threaded with top tubing string 7; Pressure bearing device body 1 waist screw thread 8 is positioned at the periphery of described hollow tubular structure, is threaded with lower contact 9 upper ends, and lower contact 9 lower ends are connected with bottom tubing string 10 by screw thread.
When construction, shock resistance pressure bearing device provided by the invention is connected to the appropriate location on tubing string, and is lowered into downhole designs installation site with tubing string, surface pump applies hydraulic coupling, can circulate.
Need turn on pump circulation time, the liquid in top tubing string 7 enters in bottom tubing string 10 by the hollow tube in pressure bearing device body 1 and lower contact 9, realizes pipeline circulation unimpeded.
When needs raise tubing string internal pressure while carrying out temporary plugging, drop into blanking plug, can pumping blanking plug while needs, in the time that blanking plug arrives the pressure bearing device of tubing string, blanking plug is by the hollow tube in pressure bearing device body 1, enter centre bore, be located in the pedestal undergauge place of hollow tube bottom, hollow tube bottom center hole is blocked, form sealing, in whole sleeve pipe, form enclosure space, reach the object of pressurization in tubing string, provide pressure support ventilation in managing.In the time taking a seat in blanking plug arrival undergauge place, hollow tube bottom, the cut-off of fluid column moment, fluid column forward impact power is converted into mechanical force by pressure bearing device body 1, be directly delivered on top tubing string 7, now hydraulic pressure is liquid column hydrostatic pressure in tubing string, and shear pin can sustain this liquid column hydrostatic pressure, because piston 2 and shear pin 4 are not subject to the impact of forward impact power, the problem of having avoided shear pin 4 to cut off in advance, has avoided construction erroneous judgement.
In the time of needs recycling, apply hydraulic coupling by surface pump, liquid column hydrostatic pressure in rising tubing string, hydraulic pressure is delivered on piston 2 by the circulation port 5 arranging on pressure bearing device body 1, and the pressure of piston 2 is delivered on shear pin 4 and pressure bearing device body 1; When slowly rising pressure is to design load, shear pin 4 is cut off, it is descending that pressure promotes piston 2, until the annular space 3 between pressure bearing device body 1 lower outside and lower contact inner side is unimpeded, liquid in top tubing string 7, by circulation port 5, annular space 3 and lower contact 9, enter in bottom tubing string 10, realize the recycling of pipeline.
The present embodiment object is to make professional and technical personnel in the field to understand technical scheme of the present invention and to be implemented according to it; can not limit with it protection domain of this patent; allly disclose according to the present invention the distortion that technology is done, within all falling into protection scope of the present invention.
Claims (2)
1. a shock resistance pressure bearing device, is characterized in that, comprises pressure bearing device body, piston ring and lower contact; Pressure bearing device body is hollow tubular structure, and its bottom internal diameter shrinks to accept the blanking plug of taking a seat, and its upper end and waist arrange respectively screw thread, are used for connecting upper tube rod structure and lower contact; Pressure bearing device body lower outside and and the inner side of the lower contact middle and lower part tubular column structure that is connected of pressure bearing device body between form an annular space; Within the piston ring that is fixed on pressure bearing device body lower, outer perimeter by shear pin is positioned at described annular space, piston ring and the sealing of described annular space mineralization pressure; The position that pressure bearing device body is positioned on piston ring arranges multiple circulation ports, to be communicated with the annular space on the intrinsic hollow tube of pressure bearing device and piston ring.
2. a kind of shock resistance pressure bearing device according to claim 1, is characterized in that, described pressure bearing device body upper end screw thread is positioned at the inwall of described hollow tubular structure, is connected with upper tube male screw; Pressure bearing device body waist screw thread is positioned at the periphery of described hollow tubular structure, is threaded with lower contact upper end, and lower contact lower end is connected with bottom tubing string by screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420297941.1U CN204002708U (en) | 2014-06-06 | 2014-06-06 | A kind of shock resistance pressure bearing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420297941.1U CN204002708U (en) | 2014-06-06 | 2014-06-06 | A kind of shock resistance pressure bearing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204002708U true CN204002708U (en) | 2014-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420297941.1U Expired - Fee Related CN204002708U (en) | 2014-06-06 | 2014-06-06 | A kind of shock resistance pressure bearing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204002708U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105019864A (en) * | 2014-06-06 | 2015-11-04 | 中国海洋石油总公司 | Shock resistant pressure bearing device |
-
2014
- 2014-06-06 CN CN201420297941.1U patent/CN204002708U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105019864A (en) * | 2014-06-06 | 2015-11-04 | 中国海洋石油总公司 | Shock resistant pressure bearing device |
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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: 20141210 Termination date: 20150606 |
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| EXPY | Termination of patent right or utility model |