CN214532881U - Non-contact gear sealing rod anti-breaking wellhead sealing device - Google Patents
Non-contact gear sealing rod anti-breaking wellhead sealing device Download PDFInfo
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- CN214532881U CN214532881U CN202120977270.3U CN202120977270U CN214532881U CN 214532881 U CN214532881 U CN 214532881U CN 202120977270 U CN202120977270 U CN 202120977270U CN 214532881 U CN214532881 U CN 214532881U
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Abstract
The utility model discloses a well head sealing device is prevented breaking off by non-contact gear seal pole, its characterized in that: the device comprises a broken rod blowout prevention unit, an offset adjusting guide unit, a temporary sealing unit and a packing sealing unit; the broken rod blowout prevention unit comprises a lower joint, a lower pressing cap, a positioning block, a lower pressing pad and a blowout prevention ball; the deviation adjusting guide unit comprises a deviation adjusting ball sleeve, a deviation adjusting ball head and a guide sleeve; the temporary sealing unit comprises a sleeve type sealing shell, a rack pressing sleeve and a well plugging device gear shaft; the packing sealing unit comprises a sleeve type packing shell, and a packing sealing cavity is arranged in the packing shell. The sealing device has good sealing effect, has the function of deviation adjustment and sealing, can add sealing materials without stopping, and has the function of breaking and separating a seam.
Description
Technical Field
The utility model belongs to the technical field of the well head sealing device, concretely relates to well head sealing device is prevented breaking off by non-contact gear seal pole.
Background
The wellhead sealing device is a sealing device arranged between a wellhead and the pumping unit, and the wellhead sealing device seals the polish rod moving up and down to prevent the ejection of oil vapor in the environment. At present, because of the dislocation between the pumping unit and the well head or the misalignment problem of the well head, the polished rod and the sealing device generate eccentric wear, and the sealing device can easily lose efficacy. On the other hand, traditional well head sealing device must shut down the beam-pumping unit and just can carry out the work of sealing packing, influences equipment work efficiency. Thirdly, once the polished rod breaks off, the sealing effect of the traditional wellhead sealing device fails, and great potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
To solve the problems set forth in the background art described above. The utility model provides a well head sealing device is prevented breaking off by non-contact gear seal pole has sealed effectual, has the sealed function of tuningout, can add sealed material without shut down, and has the seam function of breaking off.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a well head sealing device is prevented breaking off by non-contact gear seal pole which characterized in that: the device comprises a broken rod blowout prevention unit, an offset adjusting guide unit, a temporary sealing unit and a packing sealing unit; the broken rod blowout prevention unit comprises a lower joint, a lower pressing cap, a positioning block, a lower pressing pad and a blowout prevention ball, the lower joint is a tubular joint, a circumferential groove is formed in the inner side of the upper portion of the lower joint, the positioning block is arranged in the circumferential groove, the positioning block is provided with a U-shaped groove, the blowout prevention ball is arranged in the U-shaped groove, the lower pressing pad is pressed on the upper portion of the positioning block, the lower circumferential surface of the lower pressing pad is a wedge-shaped inclined surface, and the lower pressing cap is arranged on the upper portion of the lower joint and covers the lower pressing pad; the deviation adjusting guide unit comprises a deviation adjusting ball sleeve, a deviation adjusting ball head and a guide sleeve, the deviation adjusting ball sleeve is provided with a ball groove with an opening at the lower part, the deviation adjusting ball head is assembled in the ball groove, the guide sleeve is installed in the deviation adjusting ball head, and the lower part of the deviation adjusting ball head is fixed with the lower pressing cap; the temporary sealing unit comprises a sleeve type sealing shell, a rack pressing sleeve and a blowout preventer toothed shaft, wherein the rack pressing sleeve is installed in the sealing shell, an upper sealing ring surface is arranged on the inner side of the upper part of the sealing shell, a lower sealing ring surface corresponding to the upper sealing ring surface is arranged at the upper end part of the rack pressing sleeve, an annular sealing member is installed between the lower sealing ring surface and the upper sealing ring surface, a vertical rack part is arranged at the side part of the rack pressing sleeve, and the axis of the blowout preventer toothed shaft is transversely arranged and meshed with the rack part of the rack pressing sleeve; the packing sealing unit comprises a sleeve type packing shell, and a packing sealing cavity is arranged in the packing shell.
Preferably, the upper part of the lower joint is combined with the lower pressing cap through threads, and a sealing ring is arranged between the lower joint and the lower pressing cap; the wedge-shaped inclined plane of the lower pressure pad is a high circumferential inclined plane in the outsole.
Preferably, the lower end of the deviation adjusting ball head is welded with the lower pressing cap, the deviation adjusting ball head is provided with a through hole coaxial with the lower joint, and the guide sleeve is assembled in the through hole of the deviation adjusting ball head; a sealing ring is arranged between the deviation adjusting ball head and the deviation adjusting ball sleeve, a deviation adjusting pressure cap is installed on the lower portion of the deviation adjusting ball sleeve through threads, and deviation adjusting gaps are formed among the deviation adjusting ball sleeve, the deviation adjusting pressure cap and the deviation adjusting ball head.
Preferably, the upper and lower seal ring surfaces are wedge ring surfaces, and the annular seal is press-fitted in the annular cavity formed between the upper and lower seal ring surfaces.
Preferably, a gear shaft outer sleeve is mounted on the side portion in the seal housing, the blowout preventer gear shaft is mounted in the gear shaft outer sleeve through a bearing, and the outer end portion of the blowout preventer gear shaft extends out of the gear shaft outer sleeve.
Preferably, the gear shaft outer sleeve is provided with a locking shaft, the axis of the locking shaft is perpendicular to the axis of the blowout preventer gear shaft, and the blowout preventer gear shaft is provided with a locking circumferential groove combined with the end part of the locking shaft.
Preferably, the inboard installation seal cover in upper end of packing casing, gland is gone up in the upper end of packing casing through threaded installation, the lateral part of packing casing is equipped with the communicating charge door main part in the packing sealed chamber with the packing casing, the charge door main part has the charge door, the control is installed to the charge door main part the switch axle of charge door switching, the outer tip installation plug of charge door main part's charge door.
Compared with the prior art, the beneficial effects of the utility model are that:
this sealing device mainly can solve because of the beam-pumping unit dislocation or the well head sinks to lead to polished rod and well head misalignment to cause the eccentric wear problem through the design of tuningout guide unit, rights polished rod through tuningout guide unit simultaneously, and original static friction is changed into the sliding friction between tuningout bulb and the tuningout sliding sleeve, when greatly reducing the wearing resistance, has increased the tuningout angle. On the other hand, this device can realize not stopping the well and adding the packing function when giving consideration to ordinary packing. The temporary sealing unit adopts a gear transmission process, can realize the well stopping sealing function through one-way control, is convenient and reliable to operate, wastes time and labor compared with the two-way adjustment of a common packing box, and has great superiority. The broken rod blowout prevention unit realizes the blowout prevention function by utilizing the automatic setting principle of the blowout prevention ball and the throat hole part at the middle lower end of the sealing shell, does not influence the normal production of an oil well, and can avoid environmental pollution and production accidents caused by broken and broken polished rods.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the blowout preventing unit of the present invention;
FIG. 3 is a schematic structural view of the positioning block of the present invention;
fig. 4 is a schematic structural view of the center deflection adjusting guide unit of the present invention;
fig. 5 is a schematic structural diagram of a temporary sealing unit in the present invention;
fig. 6 is a schematic structural diagram of the packing sealing unit of the present invention.
In the figure: 1. a broken rod blowout prevention unit; 1-1, lower joint; 1-2, pressing the cap; 1-3, positioning blocks; 1-4, pressing pad; 1-5, blowout prevention balls; 2. a deviation adjustment guide unit; 2-1, adjusting the deviation ball sleeve; 2-2, adjusting the offset bulb; 2-3, a guide sleeve; 2-4, adjusting a bias cap; 3. a temporary sealing unit; 3-1, sealing the shell; 3-2, pressing and sleeving the rack; 3-3, a well plugging device gear shaft; 3-4, an annular seal; 3-5, a gear shaft sleeve; 3-6, pressing a cap by a gear; 3-7, a locking shaft; 3-8, locking the shaft sleeve; 3-9, locking the shaft cap; 4. a packing sealing unit; 4-1, packing shell; 4-2, sealing sleeve; 4-3, pressing a cover; 4-4, a feed inlet main body; 4-5, a switch shaft; 4-6, and plugging with a plug.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides the following technical solutions: the utility model provides a well head sealing device is prevented breaking off by non-contact gear seal pole which characterized in that: the device comprises a broken rod blowout prevention unit 1, an offset guide unit 2, a temporary sealing unit 3 and a packing sealing unit 4.
Referring to fig. 2 and 3, the broken rod blowout prevention unit 1 comprises a lower joint 1-1, a lower pressure cap 1-2, a positioning block 1-3, a lower pressure pad 1-4 and a blowout prevention ball 1-5. The lower joint 1-1 is a tubular joint, namely a sleeve. The inner side of the upper part of the lower joint 1-1 is provided with a circumferential groove, the positioning block 1-3 is a circular ring-shaped block body, the middle of the positioning block 1-3 is provided with a hole for a polished rod to pass through, the positioning block 1-3 is provided with a U-shaped groove, the U-shaped groove is formed by extending the hole at the center of the positioning block 1-3 to one side, and the positioning block 1-3 is arranged in the circumferential groove. In the embodiment, the bottom surface of the circumferential groove is a wedge-shaped ring surface, and the lower end surfaces of the positioning blocks 1-3 are wedge-shaped ring surfaces matched with the wedge-shaped ring surfaces. The upper end surface of the positioning block 1-3 is a wedge-shaped ring surface with the lower end surface, and the inner part is higher than the outer part. The polish rod penetrates through the central through hole of the lower joint and passes through the holes of the positioning blocks 1-3.
The blowout prevention balls 1-5 are arranged in the U-shaped groove, the upper portion of the positioning block 1-3 presses the lower pressure pad 1-4, the lower circumferential surface of the lower pressure pad 1-4 is a wedge-shaped inclined surface, the wedge-shaped inclined surface is matched and combined with the upper end surface of the positioning block 1-3, and the upper end surface of the lower pressure pad 1-4 is a circular ring-shaped plane. The lower pressing cap 1-2 is installed on the upper portion of the lower joint 1-1 and covers the lower pressing pad 1-4. Specifically, the upper part of the lower joint 1-1 is combined with the lower pressing cap 1-2 through threads, and a sealing ring is arranged between the lower joint 1-1 and the lower pressing cap 1-2. The wedge-shaped slope of the lower pressure pads 1-4 is a high circumferential slope in the outsole.
Referring to fig. 4, the deviation-adjusting guiding unit 2 includes a deviation-adjusting ball sleeve 2-1, a deviation-adjusting ball 2-2 and a guiding sleeve 2-3. The deviation-adjusting ball sleeve 2-1 is provided with a ball groove with an opening at the lower part, the deviation-adjusting ball head 2-2 is assembled in the ball groove, the deviation-adjusting ball head 2-2 is internally provided with a guide sleeve 2-3, and the guide sleeve 2-3 is a nylon sleeve. The lower part of the deviation-adjusting ball head 2-2 is fixed with the lower pressing cap 1-2. In the embodiment, the lower end of the deviation-adjusting ball head 2-2 is welded with the lower pressing cap 1-2. The deviation adjusting ball head 2-2 is provided with a through hole coaxial with the lower joint 1-1, and the guide sleeve 2-3 is assembled in the through hole of the deviation adjusting ball head 2-2. A sealing ring is arranged between the deviation adjusting ball head 2-2 and the deviation adjusting ball sleeve 2-1, a deviation adjusting cap 2-4 is arranged at the lower part of the deviation adjusting ball sleeve 2-1 through threads, and deviation adjusting gaps are arranged among the deviation adjusting ball sleeve 2-1, the deviation adjusting cap 2-4 and the deviation adjusting ball head 2-2. A sealing gasket is arranged between the bias adjusting cap 2-4 and the bias adjusting ball sleeve 2-1, and the sealing ring is an O-shaped ring.
Referring to fig. 5, the temporary sealing unit 3 comprises a sleeve type sealing housing 3-1, a rack pressing sleeve 3-2 and a blowout preventer pinion shaft 3-3. The rack pressing sleeve 3-2 is arranged in the sealing shell 3-1, the inner side of the upper part of the sealing shell 3-1 is provided with an upper sealing ring surface, the upper end part of the rack pressing sleeve 3-2 is provided with a lower sealing ring surface corresponding to the upper sealing ring surface, and an annular sealing element 3-4 is arranged between the lower sealing ring surface and the upper sealing ring surface. The upper sealing ring surface and the lower sealing ring surface are wedge-shaped ring surfaces, and the annular sealing elements 3-4 are pressed between the upper sealing ring surface and the lower sealing ring surface to form an annular cavity. The annular sealing element 3-4 is a wax hanging packing.
The side part of the rack pressing sleeve 3-2 is provided with a hollow hole, the side wall of the hollow hole is provided with a vertical rack part, and the axis of the well sealer toothed shaft 3-3 is transversely arranged and meshed with the rack part of the rack pressing sleeve 3-2. The gear shaft 3-3 of the blowout preventer rotates around the axis to drive the rack pressing sleeve 3-2 to press the annular sealing element 3-4 upwards. In the embodiment, a gear shaft outer sleeve 3-5 is arranged on the side part of a sealing shell 3-1, a blowout preventer gear shaft 3-3 is assembled in the gear shaft outer sleeve 3-5 through a bearing, the bearing is a thrust bearing, and a gear pressure cap 3-6 for locking and limiting the axial direction of the blowout preventer gear shaft 3-3 is installed at the outer end part of the gear shaft outer sleeve 3-5 through threads. The outer end part of the well sealer toothed shaft 3-3 extends out of the outer sleeve of the toothed shaft and is a driving end. The gear shaft outer sleeve 3-5 is provided with a locking shaft 3-7, namely the upper part of the gear shaft outer sleeve 3-5 is welded with a locking shaft sleeve 3-8, the upper end of the locking shaft sleeve 3-8 is provided with a locking shaft cap 3-9 through threads, the axis of the locking shaft 3-7 is vertical to the axis of the gear shaft 3-3 of the blowout preventer, and the gear shaft 3-3 of the blowout preventer is provided with a locking circumferential groove combined with the end part of the locking shaft 3-7. The locking shaft 3-7 is combined with the locking shaft cap screw thread 3-9, the locking shaft 3-7 is rotated, and the locking shaft 3-3 can be tightly propped against the well plugging device gear shaft through the end part of the locking shaft 3-7, so that the locking is realized.
The novel temporary sealing unit adopts the standard gear rack transmission principle, designs and produces a novel high-efficiency practical gear shaft and rack pressing sleeve pressing mechanism, can realize the well stopping sealing function through single control, is more reliable in operation, wastes time and energy compared with the bidirectional adjustment of a common packing box, and has great superiority.
Referring to fig. 6, the packing unit 4 includes a sleeve-type packing housing 4-1, the lower end of the packing housing 4-1 is connected to the sealing housing 3-1 by a screw, and a sealing ring is installed between the two. A packing sealing cavity is arranged in the packing shell 4-1. In the embodiment, a sealing sleeve 4-2 is installed on the inner side of the upper end of a packing shell 4-1, an upper gland 4-3 is installed on the upper end of the packing shell 4-1 through threads, a charging opening main body 4-4 communicated with a packing sealing cavity of the packing shell 4-1 is arranged on the side portion of the packing shell 4-1, the charging opening main body 4-4 is provided with a charging hole, a switch shaft 4-5 for controlling the charging hole to be opened and closed is installed on the charging opening main body 4-4, and a plug 4-6 is installed at the outer end portion of the charging hole of the charging opening main body 4-4. The switch shaft 4-5 is a shaft body with a radial through hole, and the radial through hole and the feed hole can be staggered or communicated by rotating the switch shaft, so that the feed hole can be controlled to be opened and closed. The plug 4-6 is installed at the outer end of the charging hole main body 4-4 through threads.
When the sealing device is installed at a wellhead, the lower joint is connected with the wellhead through threads, and the polish rod penetrates through the lower joint. Then a positioning block is installed, the blowout prevention ball is placed into the U-shaped groove of the positioning block from the side face of the polished rod, a lower pressing pad is installed, and finally a lower pressing cap is screwed. And finishing the installation of the broken rod blowout prevention unit. After the polish rod is broken and taken off, the blowout prevention ball can quickly move upwards from the U-shaped groove of the positioning block along the inclined direction of the upper lower pressure pad under the pressure action of liquid at the bottom of the well, and quickly reaches the open hole at the middle lower end of the sealing shell, namely the throat hole part is blocked, so that the blowout of the plugging liquid is realized, and the blowout prevention purpose is achieved. The blowout prevention ball is a solid ball, so that the service life is long, and the blowout prevention effect is reliable.
The polished rod deviates from the angle stored by the axis of the lower joint, the polished rod runs through the deviation adjusting guide unit, the deviation adjusting guide unit adjusts the radial deviation angle through the deviation adjusting ball head, the deviation direction of the polished rod or a wellhead can be self-adapted, the deviation of the polished rod is prevented from being adjusted by artificial external force, the deviation adjusting function is realized, the effective deviation angle of the polished rod running through the deviation adjusting guide unit can reach about 21 degrees, and due to improvement, the installation efficiency is improved, and the application range is further expanded.
Through the coordination of the deviation adjusting ball head and the built-in nonmetal centering sleeve (namely the guide sleeve), the friction coefficient is greatly reduced, and the radial friction force of the polished rod is reduced, particularly, the current mechanical deviation adjustment is realized, the deviation amount of the polished rod is forcibly increased by external force (the maximum value is 19mm, and the maximum deviation angle is about 10 degrees), and the problem of centering cannot be well solved due to the fact that the direction of the deviation angle is not uniform with the displacement direction of the polished rod. But the deviation-adjusting guide unit with any angle not only reduces radial wear resistance and radial offset but also increases the deviation-adjusting angle to about 21 degrees under the combined action of the deviation-adjusting ball head and the guide sleeve centering sleeve.
Due to the action of the deviation-adjusting guide unit, the sealing device can prolong the sealing period by more than 3-5 times by adding the packing for the common oil field, can improve the packing period by more than 6 times by using special sealing materials such as particles and the like at most, and can realize the function of adding the packing without stopping the well.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a well head sealing device is prevented breaking off by non-contact gear seal pole which characterized in that: the device comprises a broken rod blowout prevention unit (1), an offset adjusting guide unit (2), a temporary sealing unit (3) and a packing sealing unit (4);
the broken rod blowout prevention unit (1) comprises a lower joint (1-1), a lower pressure cap (1-2), a positioning block (1-3), a lower pressure pad (1-4) and a blowout prevention ball (1-5), the lower joint (1-1) is a tubular joint, the inner side of the upper part of the lower joint (1-1) is provided with a circumferential groove, the positioning blocks (1-3) are arranged in the circumferential grooves, the positioning blocks (1-3) are provided with U-shaped grooves, the blowout prevention balls (1-5) are arranged in the U-shaped groove, the upper part of the positioning block (1-3) presses the lower pressure pad (1-4), the lower circumferential surface of the lower pressure pad (1-4) is a wedge-shaped inclined surface, and the lower pressure cap (1-2) is arranged at the upper part of the lower joint (1-1) and covers the lower pressure pad (1-4);
the deviation-adjusting guide unit (2) comprises a deviation-adjusting ball sleeve (2-1), a deviation-adjusting ball head (2-2) and a guide sleeve (2-3), the deviation-adjusting ball sleeve (2-1) is provided with a ball groove with an opening at the lower part, the deviation-adjusting ball head (2-2) is assembled in the ball groove, the guide sleeve (2-3) is installed in the deviation-adjusting ball head (2-2), and the lower part of the deviation-adjusting ball head (2-2) is fixed with the lower pressing cap (1-2);
the temporary sealing unit (3) comprises a sleeve-type sealing shell (3-1), a rack pressing sleeve (3-2) and a blowout preventer toothed shaft (3-3), the rack pressing sleeve (3-2) is installed in the sealing shell (3-1), an upper sealing ring surface is arranged on the inner side of the upper portion of the sealing shell (3-1), a lower sealing ring surface corresponding to the upper sealing ring surface is arranged at the upper end portion of the rack pressing sleeve (3-2), an annular sealing member (3-4) is installed between the lower sealing ring surface and the upper sealing ring surface, a vertical rack portion is arranged on the side portion of the rack pressing sleeve (3-2), and the axis of the blowout preventer toothed shaft is transversely arranged and is meshed with the rack portion of the rack pressing sleeve (3-2);
the packing sealing unit (4) comprises a sleeve type packing shell (4-1), and a packing sealing cavity is arranged in the packing shell (4-1).
2. The non-contact gear seal rod anti-break wellhead sealing device according to claim 1, characterized in that: the upper part of the lower joint (1-1) is combined with the lower pressing cap (1-2) through threads, and a sealing ring is arranged between the lower joint (1-1) and the lower pressing cap (1-2); the wedge-shaped inclined plane of the lower pressure pad (1-4) is a high circumferential inclined plane in the outsole.
3. The non-contact gear seal rod anti-break wellhead sealing device according to claim 1, characterized in that: the lower end of the deviation adjusting ball head (2-2) is welded with the lower pressing cap (1-2), the deviation adjusting ball head (2-2) is provided with a through hole coaxial with the lower joint (1-1), and the guide sleeve (2-3) is assembled in the through hole of the deviation adjusting ball head (2-2); a sealing ring is arranged between the deviation adjusting ball head (2-2) and the deviation adjusting ball sleeve (2-1), a deviation adjusting cap (2-4) is installed on the lower portion of the deviation adjusting ball sleeve (2-1) through threads, and deviation adjusting gaps are formed among the deviation adjusting ball sleeve (2-1), the deviation adjusting cap (2-4) and the deviation adjusting ball head (2-2).
4. The non-contact gear seal rod anti-break wellhead sealing device according to claim 1, characterized in that: the upper sealing ring surface and the lower sealing ring surface are wedge-shaped ring surfaces, and the annular sealing elements (3-4) are pressed between the upper sealing ring surface and the lower sealing ring surface to form an annular cavity.
5. The non-contact gear seal rod anti-break wellhead sealing device according to claim 4, characterized in that: a gear shaft outer sleeve (3-5) is arranged on the side of the sealing shell (3-1), the blowout preventer gear shaft (3-3) is assembled in the gear shaft outer sleeve (3-5) through a bearing, and the outer end part of the blowout preventer gear shaft (3-3) extends out of the gear shaft outer sleeve (3-5).
6. The non-contact gear seal rod anti-break wellhead sealing device according to claim 5, characterized in that: the gear shaft outer sleeve (3-5) is provided with a locking shaft (3-7), the axis of the locking shaft (3-7) is perpendicular to the axis of the blowout preventer gear shaft (3-3), and the blowout preventer gear shaft (3-3) is provided with a locking circumferential groove combined with the end part of the locking shaft (3-7).
7. The non-contact gear seal rod anti-break wellhead sealing device according to claim 1, characterized in that: the packing device is characterized in that a sealing sleeve (4-2) is mounted on the inner side of the upper end of the packing shell (4-1), an upper gland (4-3) is mounted on the upper end of the packing shell (4-1) through threads, a charging opening main body (4-4) communicated with a packing sealing cavity of the packing shell (4-1) is arranged on the side portion of the packing shell (4-1), the charging opening main body (4-4) is provided with a charging hole, an opening and closing shaft (4-5) for controlling the charging hole to be opened and closed is mounted on the charging opening main body (4-4), and a plug (4-6) is mounted at the outer end portion of the charging hole of the charging opening main body (4-4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120977270.3U CN214532881U (en) | 2021-05-08 | 2021-05-08 | Non-contact gear sealing rod anti-breaking wellhead sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120977270.3U CN214532881U (en) | 2021-05-08 | 2021-05-08 | Non-contact gear sealing rod anti-breaking wellhead sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214532881U true CN214532881U (en) | 2021-10-29 |
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ID=78283738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120977270.3U Active CN214532881U (en) | 2021-05-08 | 2021-05-08 | Non-contact gear sealing rod anti-breaking wellhead sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214532881U (en) |
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2021
- 2021-05-08 CN CN202120977270.3U patent/CN214532881U/en active Active
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