CN216866599U - Movable joint for butt joint of polished rod and sucker rod - Google Patents
Movable joint for butt joint of polished rod and sucker rod Download PDFInfo
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- CN216866599U CN216866599U CN202221399956.XU CN202221399956U CN216866599U CN 216866599 U CN216866599 U CN 216866599U CN 202221399956 U CN202221399956 U CN 202221399956U CN 216866599 U CN216866599 U CN 216866599U
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Abstract
The utility model relates to the technical field of oilfield pipe fittings, in particular to a movable joint for butt joint of a polish rod and a sucker rod, which comprises an upper joint and a lower joint, wherein a sleeve and an anti-falling shaft sleeve which are coaxially arranged are arranged between the upper joint and the lower joint; the anti-falling shaft sleeve is positioned in the cavity of the sleeve, and the top of the inner cavity of the sleeve is provided with an annular step for limiting the anti-falling shaft sleeve; the bottom of the upper joint penetrates into a cavity of the anti-falling shaft sleeve through an inner hole of the annular step, pin holes corresponding to the anti-falling shaft sleeve and the bottom of the upper joint are formed in the anti-falling shaft sleeve and the bottom of the upper joint, and pin shafts for connecting the anti-falling shaft sleeve and the upper joint are inserted into the pin holes; the top of the lower joint is connected with the bottom of the sleeve, and the anti-falling shaft sleeve is sealed in the cavity of the sleeve. The upper end and the lower end of the utility model can freely rotate, and when one end of the utility model is twisted, the other end of the utility model can not be affected, thus being convenient for connecting with the sucker rod and the polished rod.
Description
Technical Field
The utility model relates to the technical field of oilfield pipe fittings, in particular to a movable joint for butting a polished rod and a sucker rod.
Background
The pumping unit is connected with the oil well pump through a rod column, the power of the pumping unit is transmitted to the oil well pump, and the pumping unit is generally divided into a polish rod, a common sucker rod and a weighting rod according to the action of each part in the rod column.
Along with the continuous deepening of oil field development, the small pump is deep-pumped, and long stroke is low stroke frequency, more and more generally, along with flexible long polished rod overlength stroke beam-pumping unit also develops for the use that matches carbon fiber sucker rod.
After the operation of the wellhead is finished, the sucker rod is fixed on the wellhead through the elevator and cannot rotate, the flexible long polished rod is different from a common steel polished rod with the length of 11 meters, the length of the flexible long polished rod is generally 30-50 meters, one end of the flexible long polished rod is also fixed on the oil pumping unit, and the flexible long polished rod cannot freely rotate like the common polished rod during connection.
The conventional connecting structure is as follows: patent No. 202021640271.0 discloses a sucker rod coupling and sucker rod coupling connection structure, when connecting sucker rod and flexible polished rod, the shortcoming that this kind of structure type mainly has several following aspects leads to unable adaptation:
1. because the connecting structure is an integrated rigid structure, the upper part and the lower part can not rotate freely, and the connecting structure can be connected in sequence only from bottom to top;
2. the thread turning directions of the two ends of the connecting structure are consistent, and when the sucker rod is twisted, the other end of the connecting structure is easy to fall off;
3. when the flexible long polished rod is installed, the upper end of the flexible long polished rod is fixed at first and then connected with the sucker rod at the lower end, and if a coupling of the rotary connection structure is rotated, the flexible long polished rod at the upper end is twisted, and self-twisting is generated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a movable joint for butt joint of a polish rod and a sucker rod, aiming at overcoming the defects in the prior art, wherein the upper end and the lower end of the movable joint can freely rotate, and when one end of the movable joint is twisted, the other end of the movable joint cannot be influenced, so that the movable joint is conveniently connected with the sucker rod and the polish rod.
The technical scheme of the utility model is as follows:
a movable joint for butt joint of a polish rod and a sucker rod comprises an upper joint and a lower joint, wherein the upper end of the upper joint and the lower end of the lower joint are respectively provided with a threaded part;
a sleeve and an anti-falling shaft sleeve which are coaxially arranged are arranged between the upper joint and the lower joint;
the anti-falling shaft sleeve is positioned in the cavity of the sleeve, and the top of the inner cavity of the sleeve is provided with an annular step for limiting the anti-falling shaft sleeve;
the bottom of the upper joint penetrates into a cavity of the anti-falling shaft sleeve through an inner hole of the annular step, pin holes corresponding in position are formed in the anti-falling shaft sleeve and the bottom of the upper joint, and a pin shaft for connecting the anti-falling shaft sleeve and the upper joint is inserted into the pin holes;
the top and the telescopic bottom of lower clutch are connected to seal the anticreep axle sleeve in telescopic intracavity, the anticreep axle sleeve can be at sleeve intracavity rotation, and connect through anticreep axle sleeve and top connection bottom, can make top connection and the relative free rotation of lower clutch.
Preferably, the thread part of the upper joint is opposite to the thread line of the thread part of the lower joint.
Preferably, one end of the pin shaft is provided with a countersunk head, and one side of the pin hole in the anti-falling shaft sleeve is provided with a countersunk head groove for accommodating the countersunk head.
Preferably, the top of the lower joint is welded with the bottom of the sleeve.
Preferably, the top of the outer circumferential surface of the lower joint is provided with a welding slope, and a welding seam is formed between the welding slope and the sleeve.
Preferably, a positioning boss which is inserted into the inner cavity of the sleeve and is matched with the inner cavity of the sleeve is arranged at the center of the circle at the top of the lower joint.
Compared with the prior art, the utility model has the following advantages:
the joint structures at the upper end and the lower end of the flexible long polished rod can rotate freely, one end of the flexible long polished rod can not influence the other end when being twisted, the flexible long polished rod and the sucker rod are not required to be connected in sequence from bottom to top when the flexible long polished rod and the sucker rod are connected, the mounting mode is more flexible, and particularly, when the flexible long polished rod is connected, the flexible long polished rod at the upper end cannot be twisted to generate self torque because the upper end of the flexible long polished rod is fixed.
The anti-falling shaft sleeve and the upper joint are connected through the pin shaft, and the split parts are connected into an integrated structure through the welded lower joint and the welded sleeve, so that the anti-falling shaft sleeve is reasonable in structure and convenient to assemble.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic illustration of an explosive structure according to the present invention;
FIG. 3 is a schematic cross-sectional view of the present invention;
in the figure: 1. the anti-dropping device comprises an upper connector, a sleeve, a lower connector, a sleeve, a pin shaft, a welding line, a thread part of the upper connector, a thread part of the lower connector, a pin shaft, a welding line, a pin shaft, a.
Detailed Description
The utility model is further illustrated below with reference to the figures and examples.
Example 1
Referring to fig. 1 to 3, the movable joint for butt joint of a polish rod and a sucker rod comprises an upper joint 1 and a lower joint 3, wherein the upper end of the upper joint 1 and the lower end of the lower joint 3 are respectively provided with a threaded part.
Wherein, the screw thread portion 8 of lower clutch can adopt the structural style of sucker rod standard internal thread, and the screw thread portion 7 of top connection adopts left-handed external screw thread to be connected with flexible long polished rod, also can match according to the helicitic texture of specific polished rod and sucker rod.
A sleeve 2 and an anti-dropping shaft sleeve 4 which are coaxially arranged are arranged between the upper joint 1 and the lower joint 3.
The bottom of the upper joint 1 passes through the inner hole of the annular step 201 and penetrates into the cavity of the anti-falling shaft sleeve 4.
The anti-dropping shaft sleeve 4 is provided with a first pin hole 401, the bottom of the upper joint 1 is provided with a second pin hole 101 corresponding to the first pin hole 401, and a pin 5 for connecting the anti-dropping shaft sleeve 4 and the upper joint 1 is inserted into the first pin hole 401 and the second pin hole 101.
The top of the lower joint 3 is welded with the bottom of the sleeve 2, and the anti-dropping shaft sleeve 4 is sealed in the cavity of the sleeve 2 through the upper joint 1.
The specific welding structure is that the top of the outer peripheral surface of the lower joint 3 is provided with a first welding slope 302, a welding seam 6 for welding is formed between the first welding slope 302 and the sleeve 2, and the bottom of the sleeve 2 can also be provided with an additional welding slope structure.
In addition, the top centre of a circle department of lower clutch 3 is equipped with and inserts 2 inner chambers of sleeve to with the location boss 301 of 2 inner chambers of sleeve adaptation, through increasing location boss 301, be convenient for lower clutch 3 and 2 axial positioning of sleeve, in order to guarantee that lower clutch 3 and sleeve 2 weld the back on same axis.
The joint structures at the upper end and the lower end of the flexible long polished rod can rotate freely, one end of the flexible long polished rod can not influence the other end when being twisted, the flexible long polished rod and the sucker rod are not required to be connected in sequence from bottom to top when the flexible long polished rod and the sucker rod are connected, the mounting mode is more flexible, and particularly, when the flexible long polished rod is connected, the flexible long polished rod at the upper end cannot be twisted to generate self torque because the upper end of the flexible long polished rod is fixed.
The anti-falling shaft sleeve 4 and the upper joint 1 are connected through the pin shaft 5, and the split parts are connected into an integrated structure through the welded lower joint 3 and the sleeve 2, so that the structure is reasonable and convenient to assemble.
In addition, the material of the utility model adopts 35CrMo alloy steel, and each component is subjected to nondestructive inspection after annealing and tempering treatment, and finally is subjected to galvanizing antiseptic treatment.
Example 2
The embodiment is further optimized on the basis of embodiment 1, and specifically comprises the following steps:
referring to fig. 3, the thread portion 7 of the upper joint is opposite in helix to the thread portion 8 of the lower joint.
The sucker rod and the flexible long polished rod are all fixed in the connection process, the free rotation function of the movable joint is achieved, the sucker rod and the flexible long polished rod can be tightened with the sucker rod and the flexible long polished rod on the upper side and the lower side respectively, the butt joint operation is more convenient, the upper part and the lower part of the joint adopt different screwing threads, and the phenomenon that the threads are loosened and disengaged to fall off at the other end can be avoided when one end is rotated.
Example 3
The embodiment is further optimized on the basis of embodiment 1, and specifically comprises the following steps:
referring to fig. 1, one end of the pin 5 is provided with a countersunk head 501, and one side of the pin hole on the anti-slip shaft sleeve 4 is provided with a countersunk groove for accommodating the countersunk head 501.
Through the design that increases countersunk head 501 and countersunk head groove, be convenient for more guide and install round pin axle 5 in place, hide countersunk head 501 through the countersunk head groove simultaneously, avoid countersunk head 501 to stand out and appear the friction between the surface of anticreep axle sleeve 4 and sleeve 2 inner wall.
In addition, fastening glue can be smeared between the pin shaft 5 and the pin hole, so that the connection reliability is improved.
The present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention, and the contents of the changes still fall within the scope of the present invention.
Claims (6)
1. The utility model provides a movable joint for polished rod and sucker rod butt joint, includes top connection and lower clutch, the upper end of top connection and the lower extreme of lower clutch are equipped with screw portion, its characterized in that respectively:
a sleeve and an anti-falling shaft sleeve which are coaxially arranged are arranged between the upper joint and the lower joint;
the anti-falling shaft sleeve is positioned in the cavity of the sleeve, and the top of the inner cavity of the sleeve is provided with an annular step for limiting the anti-falling shaft sleeve;
the bottom of the upper joint penetrates into a cavity of the anti-falling shaft sleeve through an inner hole of the annular step, pin holes corresponding in position are formed in the anti-falling shaft sleeve and the bottom of the upper joint, and a pin shaft for connecting the anti-falling shaft sleeve and the upper joint is inserted into the pin holes;
the top and the telescopic bottom of lower clutch are connected to seal the anticreep axle sleeve in telescopic intracavity, the anticreep axle sleeve can be at sleeve intracavity rotation, and connect through anticreep axle sleeve and top connection bottom, can make top connection and the relative free rotation of lower clutch.
2. The movable joint for the butt joint of the polish rod and the sucker rod according to claim 1, wherein: the thread part of the upper joint is opposite to the thread line of the thread part of the lower joint.
3. The movable joint for the butt joint of the polish rod and the sucker rod according to claim 1, wherein: one end of the pin shaft is provided with a countersunk head, and one side of the pin hole in the anti-falling shaft sleeve is provided with a countersunk groove for accommodating the countersunk head.
4. The movable joint for the butt joint of the polish rod and the sucker rod according to claim 1, wherein: the top of the lower joint is welded with the bottom of the sleeve.
5. The movable joint for the butt joint of the polish rod and the sucker rod as claimed in claim 4, wherein: and a welding slope is arranged at the top of the peripheral surface of the lower joint, and a welding seam is formed between the welding slope and the sleeve.
6. The movable joint for the butt joint of the polish rod and the sucker rod as claimed in claim 4, wherein: and a positioning boss which is inserted into the inner cavity of the sleeve and is matched with the inner cavity of the sleeve is arranged at the center of the circle at the top of the lower joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221399956.XU CN216866599U (en) | 2022-06-07 | 2022-06-07 | Movable joint for butt joint of polished rod and sucker rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221399956.XU CN216866599U (en) | 2022-06-07 | 2022-06-07 | Movable joint for butt joint of polished rod and sucker rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216866599U true CN216866599U (en) | 2022-07-01 |
Family
ID=82124318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221399956.XU Active CN216866599U (en) | 2022-06-07 | 2022-06-07 | Movable joint for butt joint of polished rod and sucker rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216866599U (en) |
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2022
- 2022-06-07 CN CN202221399956.XU patent/CN216866599U/en active Active
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