CN211173988U - Sucker rod string stop device - Google Patents
Sucker rod string stop device Download PDFInfo
- Publication number
- CN211173988U CN211173988U CN201921926048.XU CN201921926048U CN211173988U CN 211173988 U CN211173988 U CN 211173988U CN 201921926048 U CN201921926048 U CN 201921926048U CN 211173988 U CN211173988 U CN 211173988U
- Authority
- CN
- China
- Prior art keywords
- rod string
- sucker rod
- screw pump
- string
- sucker
- 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
Links
Images
Abstract
The utility model discloses a rod string stop device, the main part is a stop gear: one side is provided with a bolt, a gland and a thrust ball bearing; the other side is provided with a bolt, a gland and a cylindrical roller bearing. The device needs to be used in pairs, oil pipe couplings are respectively arranged on oil pipes close to a well head end and a screw pump end, thrust ball bearings on the two devices are respectively arranged close to the well head end and the screw pump end, and cylindrical roller bearings are arranged face to face; when the sucker rod string is installed, the sucker rod string is subjected to axial pretension force by the action of the two pairs of thrust ball bearings; the limiting device at the lower part is connected with the rzeppa universal coupling through a flat key, and the lower part of the rzeppa universal coupling is connected with a screw pump rotor; the whole rigidity of the sucker rod string is improved by applying axial pretension force to the sucker rod string, the gyroscopic effect of the sucker rod string during working is weakened, the transverse displacement of the sucker rod string is limited by using the cylindrical roller bearing, the collision times of the rod pipe can be reduced in the two aspects, and the service life of the sucker rod string is prolonged.
Description
Technical Field
The utility model relates to an oil field oil pumping system, in particular to reduce the sucker rod string stop device in the aspect of sucker rod and the oil pipe friction.
Background
The ground driving screw pump oil production system has the advantages of simple structure, less initial equipment investment, good energy-saving effect, wide application range and the like, thereby being widely applied to oil fields at home and abroad. Compared with a pumping unit lifting system, the pump detection period of the ground driving screw pump oil extraction system is relatively short, the main reason is failure of a sucker rod string, and the breakage of the sucker rod string caused by eccentric wear of a sucker rod and an oil pipe is a main failure mode.
The collision between the sucker rod and the oil pipe is mainly caused by two reasons: on one hand, most of the oil fields are inclined wells without absolute vertical wells, so that the rod string can generate a gyro effect during working, and the collision frequency of the rod string and an oil pipe is increased; on the other hand, the connecting position of the bottom end of the sucker rod column and the screw pump rotor of the currently adopted ground driving screw pump oil production system is not provided with a limiting device, and the screw pump rotor does planetary motion during normal work, so that transverse vibration excitation is applied to the sucker rod column at the bottom end, and the collision frequency of the sucker rod and an oil pipe is increased.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem of the existence, improve the life of screw pump oil production system sucker-rod string, the utility model provides a sucker-rod string stop device.
The utility model discloses a following technical scheme realizes:
the utility model discloses a stop gear (11), it has the groove of installation spare part and produces liquid passageway (8) to open on it, stop gear (11) link together through oil pipe coupling (3) and oil pipe (2), install thrust ball bearing (9) and last gland (7) in one side of stop gear (11), it installs on gland (7) and goes up sealing washer (6) in order to protect thrust ball bearing (9), it fixes on stop gear (11) through positioning bolt (5) then to go up gland (7), cylindrical roller bearing (10) and lower gland (12) are installed to the opposite side of stop gear (11), lower gland (12) are also fixed on stop gear (11) through positioning bolt, and install lower sealing washer (13) on lower gland (12) in order to protect cylindrical roller bearing (10), prevent the destruction of bearing such as external impurity; the upper part of the sucker rod string limiting device close to the wellhead end upwards supports the sucker rod string (1) through a sucker rod coupling (4), the sucker rod string limiting device close to the screw pump end acts on the sucker rod string through a connecting rod (16) to exert downward tension, the connecting rod (16) is connected with the ball cage type universal coupling (15) through a flat key (14), the lower part of the ball cage type universal coupling (15) is connected with a screw pump rotor at the bottom end, the structure of the sucker rod string limiting device, the parts assembled on the sucker rod string limiting device and the assembly relation between the parts are the same as that of the sucker rod string limiting device close to the wellhead end, the sucker rod string limiting device is used in pairs during specific installation, the two devices are respectively assembled on oil pipes close to the wellhead end and the screw pump end through oil pipe coupling rings (3), and the positions after the specific installation are ensured to be thrust ball bearings, cylindrical roller bearings and thrust ball bearings from top to bottom.
Through the assembling relation of the thrust ball bearing (9) of the sucker rod string limiting device at the upper end and the lower end, the upper gland (7), the sucker rod coupling (4) and the connecting rod (16) respectively generate a relation between the two pairs of thrust ball bearings (9) and the sucker rod string which enables the movement displacement of the sucker rod string along the axial position to be limited, so that the sucker rod string between the two sucker rod string limiting devices is subjected to certain axial pretension force, the rigidity of the sucker rod string is improved, the gyroscopic effect of the sucker rod string during working and running is weakened, the collision times of the sucker rod and an oil pipe are reduced, and the service life of the sucker rod string is prolonged.
Because the lateral displacement of the connecting rod (16) close to the screw pump end is limited, in order to not influence the screw pump rotor connected with the lower end to do planetary motion, the connecting rod (16) is connected with the ball cage type universal coupling (15) through a flat key (14), and the screw pump rotor at the lower end is connected with the ball cage type universal coupling (15), so that the torque of the screw pump rotor at the lower end is transmitted by the connecting rod (16).
Through the assembly relation of the cylindrical roller bearing (10), the lower pressing cover (12) and the sucker rod, the cylindrical roller bearing (10) has the effect of limiting the transverse displacement of the sucker rod string, and particularly near the screw pump end, the transverse excitation applied to the sucker rod string by a screw pump rotor due to planetary motion can be weakened by the device, so that the transverse vibration of the sucker rod string is weakened, the collision frequency of the sucker rod and an oil pipe is reduced, and the service life of the sucker rod string is prolonged.
The sucker rod string limiting device is generally used as an assembly body and fixed on a tubing through a tubing coupling (3), and the assembly relation can enable the spatial position of the device to be more stable and can better bear the reaction force from the sucker rod string.
The utility model has the advantages that: on one hand, the utility model can apply an axial pretension force to the sucker rod string (1) through the two sucker rod string limiting devices at the upper and lower ends, thereby improving the rigidity of the sucker rod string, weakening the gyro effect, reducing the collision times of the sucker rod and the oil pipe and prolonging the service life of the sucker rod string; on the other hand, through the assembly relation of the cylindrical roller bearing (10), the lower pressing cover (12), the sucker rod (1) and the connecting rod (16), the cylindrical roller bearing (10) has the effect of limiting the transverse displacement of the sucker rod string, particularly near the screw pump end, and the transverse excitation applied to the sucker rod string by the screw pump rotor due to planetary motion can be weakened by the device, so that the transverse vibration of the sucker rod string is weakened, the collision frequency of the sucker rod and an oil pipe is reduced, and the service life of the sucker rod string is prolonged.
Drawings
FIG. 1 is a schematic diagram of the assembly of a sucker rod string retainer in a surface driven progressive cavity pump production system.
FIG. 2 is a cross-sectional view of the upper sucker rod string retainer assembled in a surface drive progressive cavity pump production system.
FIG. 3 is a cross-sectional view of the lower sucker rod string retainer assembled in a surface drive progressive cavity pump production system.
FIG. 4 is a cross-sectional view and a top view of a front view of a sucker rod string retainer.
Fig. 5 is a sectional view and a plan view of a front view of the stopper mechanism (11).
FIG. 6 is a perspective view of the upper gland (7) of the thrust ball bearing end of the sucker rod string retainer.
FIG. 7 is a perspective view of the lower gland (12) of the cylindrical roller bearing end of the sucker rod string retainer.
In the figure: 1. a sucker rod string; 2. an oil pipe; 3. a tubing coupling; 4. a sucker rod coupling; 5. positioning the bolt; 6. an upper sealing ring; 7. a gland is arranged; 8. a fluid producing channel; 9. a thrust ball bearing; 10. a cylindrical roller bearing; 11. a limiting mechanism; 12. a lower gland; 13. a lower seal ring; 14. a flat bond; 15. a rzeppa universal coupling; 16. a connecting rod; 17. a disconnecting connector;
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
as shown in fig. 2, the rod string limiting device (a device close to the wellhead end) comprises a limiting mechanism (11) connected with an oil pipe (2) through an oil pipe coupling (3), a thrust ball bearing (9) and an upper gland (7) are installed on one side of the limiting mechanism (11), an upper sealing ring (6) is installed on the upper gland (7) to protect the bearing, the upper gland (7) is fixed on the limiting mechanism (11) through a positioning bolt (5), a cylindrical roller bearing (10) and a lower gland (12) are installed on the other side of the limiting mechanism, the lower gland (12) is also fixed on the limiting mechanism (11) through a positioning bolt, and a lower sealing ring (13) is installed on the lower gland (12) to protect the cylindrical roller bearing (10) and prevent the bearing from being damaged by external impurities and the like; the rod string retainer (the device near the screw pump end) shown in fig. 3 is constructed and assembled with the same components and in the same relationship as the retainer near the wellhead end, and the entire retainer is secured to tubing (2) as an assembly by two tubing collars (3). The cylindrical roller bearings (10) of the two sucker rod string limiting devices are arranged face to face.
The method comprises the following specific implementation steps: connecting rod (16) and ball cage universal coupling (15) are connected through flat key (14) first (as shown in figure 3), and the lower end of the coupling is directly connected with the rotor of screw pump, the rotor and stator of screw pump are assembled on the ground and the stator is fixed on the bottom of oil pipe, then the device is assembled with connecting rod (16) according to the position that thrust ball bearing (9) is down and cylindrical roller bearing (10) is up as shown in figure 3, and two oil pipe couplings (3) are used to fix the limiting device on the lower part of the whole oil pipe system, and the connecting rod (16) is connected with upper sucker rod string with disconnecting device (17) by sucker rod coupling (4). The assembled device and the whole underground oil pipe are put into the underground, then the residual sucker rod string is put into the underground, and the two sections of sucker rod strings are connected through a disconnecting connector (17). In order to enable the sucker rod string to bear pre-calculated pretension force, the upper sucker rod string limiting device is fixed at an appointed position at the upper part of an oil pipe by two oil pipe couplings (3) (the appointed position is determined by calculation according to oil well parameters), acting force is applied to the top end of the sucker rod string to enable the sucker rod string to achieve proper axial pretension force, the section of the sucker rod string is connected with the upper sucker rod string through a sucker rod coupling (4), the purpose of increasing the rigidity of the sucker rod string is achieved, the gyroscopic effect of the sucker rod string during working is weakened, the number of times of collision between the sucker rod string and the oil pipe is reduced, and the service life of the sucker.
The sucker rod string limiting device (a device close to a screw pump end) and the connecting rod (16) are assembled as shown in fig. 3, the connecting rod (16) is connected with the ball cage type universal coupling (15) through the flat key (14), when the sucker rod string limiting device works, the torque is transmitted to the ball cage type universal coupling (15) through the flat key (14) by the connecting rod (16), and then the screw pump rotor is transmitted with the torque by the ball cage type universal coupling (15), so that the oil extraction function is realized. However, the influence on the sucker rod string is weakened due to the existence of the ball-cage universal coupling (15) and the sucker rod string limiting device, so that the collision frequency of the sucker rod and an oil pipe is reduced, and the service life of the sucker rod is prolonged.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that what has been described in the foregoing examples and description is illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are intended to be included within the scope of the invention as claimed.
Claims (5)
1. A sucker rod string limiting device is characterized in that: the device comprises a limiting mechanism (11), wherein grooves for mounting parts and a liquid production channel (8) are formed in the limiting mechanism (11), the limiting mechanism (11) is connected with an oil pipe (2) through an oil pipe coupling (3), a thrust ball bearing (9) and an upper gland (7) are mounted on one side of the limiting mechanism (11), an upper sealing ring (6) is mounted on the upper gland (7) to protect the thrust ball bearing (9), the upper gland (7) is fixed on the limiting mechanism (11) through a positioning bolt (5), a cylindrical roller bearing (10) and a lower gland (12) are mounted on the other side of the limiting mechanism (11), the lower gland (12) is also fixed on the limiting mechanism (11) through the positioning bolt, and a lower sealing ring (13) is mounted on the lower gland (12) to protect the cylindrical roller bearing (10), so that the bearing is prevented from being damaged by external impurities and the like; the upper part of the pumping rod string limiting device close to the wellhead end upwards supports the pumping rod string (1) through a pumping rod coupling (4), the pumping rod string limiting device close to the screw pump end acts on the pumping rod string through a connecting rod (16) to exert downward tension, the connecting rod (16) is connected with a ball cage type universal coupling (15) through a flat key (14), the lower part of the ball cage type universal coupling (15) is connected with a screw pump rotor, the structure of the sucker rod string limiting device, the parts assembled on the sucker rod string limiting device and the assembly relation between the parts are the same as that of the sucker rod string limiting device close to the wellhead end, the sucker rod string limiting device is used in pairs during specific installation, the two devices are respectively assembled on oil pipes close to the wellhead end and the screw pump end through oil pipe coupling rings (3), and the positions after the specific installation are ensured to be thrust ball bearings, cylindrical roller bearings and thrust ball bearings from top to bottom.
2. The rod string retention device of claim 1, wherein: through the assembling relation of the thrust ball bearing (9) of the sucker rod string limiting device at the upper end and the lower end, the upper gland (7), the sucker rod coupling (4) and the connecting rod (16) respectively generate a relation between the two pairs of thrust ball bearings (9) and the sucker rod string which enables the movement displacement of the sucker rod string along the axial position to be limited, so that the sucker rod string between the two sucker rod string limiting devices is subjected to certain axial pretension force, the rigidity of the sucker rod string is improved, the gyroscopic effect of the sucker rod string during working and running is weakened, the collision times of the sucker rod and an oil pipe are reduced, and the service life of the sucker rod string is prolonged.
3. The rod string retention device of claim 1, wherein: because the lateral displacement of the connecting rod (16) close to the screw pump end is limited, in order to not influence the screw pump rotor connected with the lower end to do planetary motion, the connecting rod (16) is connected with the ball cage type universal coupling (15) through a flat key (14), and the screw pump rotor at the lower end is connected with the ball cage type universal coupling (15), so that the torque of the screw pump rotor at the lower end is transmitted by the connecting rod (16).
4. The rod string retention device of claim 1, wherein: through the assembly relation of the cylindrical roller bearing (10), the lower pressing cover (12) and the sucker rod string (1), the cylindrical roller bearing (10) has the effect of limiting the transverse displacement of the sucker rod string, particularly near the screw pump end, and the device can weaken the transverse excitation of a screw pump rotor applied to the sucker rod string due to planetary motion, so that the transverse vibration of the sucker rod string is weakened, the collision frequency of a sucker rod and an oil pipe is reduced, and the service life of the sucker rod string is prolonged.
5. The rod string retention device of claim 1, wherein: the sucker rod string limiting device is generally used as an assembly body and fixed on a tubing (2) through a tubing coupling (3), and the assembly relation can enable the spatial position of the device to be more stable and can better bear the reaction force from the sucker rod string.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921926048.XU CN211173988U (en) | 2019-11-08 | 2019-11-08 | Sucker rod string stop device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921926048.XU CN211173988U (en) | 2019-11-08 | 2019-11-08 | Sucker rod string stop device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211173988U true CN211173988U (en) | 2020-08-04 |
Family
ID=71805472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921926048.XU Expired - Fee Related CN211173988U (en) | 2019-11-08 | 2019-11-08 | Sucker rod string stop device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211173988U (en) |
-
2019
- 2019-11-08 CN CN201921926048.XU patent/CN211173988U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101512099B (en) | A top drive apparatus for drilling a bore hole | |
| US20080029304A1 (en) | Mandrel and bearing assembly for downhole drilling motor | |
| EP2623707B1 (en) | Method and system for improving drilling speed by using drill string vibration | |
| CN206111149U (en) | There is pole oil jack and oil recovery mechanism thereof | |
| WO2018132915A1 (en) | Sucker rod centralizer | |
| CN211173988U (en) | Sucker rod string stop device | |
| CN105317372A (en) | One-way bypass screw drilling tool | |
| CN107893754B (en) | A kind of application method of electric submersible screw pump | |
| CN211900493U (en) | High-yield coated sucker rod with centralizer | |
| US8714935B2 (en) | Method of running a down hole rotary pump | |
| CN115111146A (en) | Anti-abrasion load-shedding oil pumping device of three-dimensional curved well and using method thereof | |
| CN114876395A (en) | Cement sheath eccentric rolling extrusion crushing tool with long service life and recovery assistance of sleeve | |
| CN201671801U (en) | Hydraulic driving screw pump with balance device | |
| CN202900073U (en) | High-inclination well hollow sucker rod self-righting device | |
| CN108105388B (en) | Improved sealing structure for hydraulic motor | |
| RU84442U1 (en) | PUMP ROD CENTER | |
| CN201568271U (en) | Efficient low-leakage across bridge pump | |
| CN108825133A (en) | A kind of hydraulic auxiliary brake device | |
| CN212225136U (en) | Composite rod pump protector | |
| CN106837218B (en) | Hydraulic pushing type rubber sealing washpipe assembly of drilling top driving device | |
| CN212774138U (en) | Hydraulic oscillator | |
| CN212774141U (en) | High-amplitude hydraulic oscillator | |
| CN204200071U (en) | The helicoid hydraulic motor of unidirectional bypass | |
| CN211008484U (en) | Longitudinal vibration damping short joint of underground sucker rod | |
| CN203175426U (en) | Oil sucking rod provided with detachable centralizer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20200804 Termination date: 20211108 |