CN114575788A - Hydraulic brake system of oil pumping unit - Google Patents
Hydraulic brake system of oil pumping unit Download PDFInfo
- Publication number
- CN114575788A CN114575788A CN202210364401.XA CN202210364401A CN114575788A CN 114575788 A CN114575788 A CN 114575788A CN 202210364401 A CN202210364401 A CN 202210364401A CN 114575788 A CN114575788 A CN 114575788A
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- Prior art keywords
- pumping unit
- sets
- bearing
- brake
- shaft
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- 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.)
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- 238000005086 pumping Methods 0.000 title claims abstract description 53
- 230000007246 mechanism Effects 0.000 claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000002146 bilateral effect Effects 0.000 claims description 2
- 210000003127 knee Anatomy 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
- E21B43/127—Adaptations of walking-beam pump systems
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
Abstract
The invention relates to the technical field of a hydraulic brake system of a pumping unit, in particular to a hydraulic brake system of a pumping unit, which comprises a pumping unit base, wherein a brake device with a driving function is arranged on the pumping unit base; through the settlement of actuating mechanism, when the hydraulic stem pulling guide block when moving back, will remove the braking to the beam-pumping unit, but the gyro wheel does not roll the inclined plane, makes the motor circular telegram before the guide block return, and the motor drives the drive wheel simultaneously, and the rotation of drive wheel makes the main shaft rotate, and the main shaft passes through the master gear messenger and follows the gear revolve, and follow gear makes two sets of actuating levers rotate through the driven shaft to make beam-pumping unit work once more, until the sucker rod of beam-pumping unit is located appropriate position, thereby the workman of being convenient for overhauls the sucker rod.
Description
Technical Field
The invention relates to the technical field of a hydraulic brake system of a pumping unit, in particular to a hydraulic brake system of a pumping unit.
Background
The beam pumping unit, also called beam pumping unit, beam crank balance pumping unit, refers to the pumping unit which contains the beam, and through the link mechanism switching-over, the crank weight is balanced, commonly called the machine of knocking head, in the former oil production process, the oil well pumping unit needs to frequently carry on the maintenance, repair the well operation, and adjust the stroke, the frequency of stroke. The brake is a mode for controlling the state of the pumping unit after the pumping unit stops.
The hydraulic brake system of the oil pumping unit is used for solving the problems that an existing oil pumping unit is inconvenient to quickly overhaul an oil rod due to the fact that an existing brake mode is inconvenient for workers to overhaul the oil rod.
Disclosure of Invention
The invention aims to provide a hydraulic brake system of an oil pumping unit, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a hydraulic brake system of a pumping unit comprises a pumping unit base, wherein a brake device with a driving function is arranged on the pumping unit base, two groups of driving rods are symmetrically arranged on two sides of the brake device, a crank balance block is arranged on each driving rod, a connecting rod is arranged on each crank balance block, and a walking beam is arranged on each connecting rod;
brake equipment includes the shell, sets up the master gear in the shell, and the main gear middle part is connected the main shaft, and the master gear meshing is followed the gear, connects the driven shaft from the gear middle part, and main shaft one end sets up brake mechanism, sets up actuating mechanism on the brake mechanism, and shell one side sets up the rectangular hole, and shell one side fixed connection hydraulic stem sets up bearing three on the main shaft, and three embedding shells of bearing, driven shaft both ends set up two sets of bearings four, and four embedding shells of bearing.
Preferably, actuating mechanism includes the drive block, and the guide block is connected to the drive block, and drive block bilateral symmetry sets up two sets of knee levers, and the knee lever both ends set up two sets of mounting grooves, and the connecting axle is one in the middle part of the knee lever, sets up the drive wheel in a set of mounting groove, sets up the pulley in another set of mounting groove.
Preferably, the driving wheel comprises a roller, an anti-skid sleeve is sleeved on the roller, a second roller is connected with a shaft in the middle, two ends of the second shaft are provided with two groups of bearings, and the bearings are embedded into the curved rod.
Preferably, the brake mechanism includes the braked wheel, and the main shaft is connected at the braked wheel middle part, and the braked wheel internal symmetry sets up two sets of arc pieces, sets up the brake block on the arc piece, sets up drive mechanism between two sets of arc pieces, and arc piece one side fixed connection accepts the board, accepts board sliding connection guide pillar, overlaps on the guide pillar and establishes the spring.
Preferably, the transmission mechanism comprises a cam, a third shaft is connected to the middle of the cam, one end of the third shaft is connected with a pinion, the pinion is meshed with an L-shaped rack, one end of the L-shaped rack is fixedly connected with a guide block, one end of the third shaft is provided with a bearing, and the bearing is embedded into the shell.
Preferably, the pulley middle part connecting shaft is four, the pulley sliding connection driving block, two ends of the shaft are provided with two sets of bearings I, the bearings I are embedded into the bent rod, one ends of the shaft are provided with bearings II, the bearings II are embedded into the shell, the guide block is in sliding connection with the rectangular hole, and the guide block is fixedly connected with the hydraulic rod.
Preferably, the brake wheel is rotatably connected with two groups of driving wheels, the guide post is provided with an upright bearing, and the upright bearing is embedded into the bearing plate.
Compared with the prior art, the invention has the beneficial effects that:
1. the hydraulic rod pushes the guide block to move along the rectangular hole, the guide block drives the L-shaped rack to move, the L-shaped rack is meshed with the pinion along with the movement of the L-shaped rack, the pinion rotates, the pinion enables the cam to rotate through the third shaft, the cam rotates to enable the two groups of protrusions on the cam to extrude the two groups of arc-shaped blocks, the arc-shaped blocks drive the bearing plates to rotate along the guide posts, the bearing plates compress the springs until the arc-shaped blocks push the brake pads to extrude the inner rings of the brake wheels, friction force is formed on the brake pads to enable the brake wheels to stop, the brake wheels cannot rotate, and the main shaft stops rotating at the same time, so that the pumping unit stops working;
2. the guide block is clamped to drive the drive block to move simultaneously, the drive block moves to enable the roller to rotate along the inclined plane arranged at the end part of the drive block, the roller is extruded by the drive block while rotating, so that the drive wheel at the other end of the curved rod continuously extrudes the brake wheel, the anti-skid sleeve is pressed and deformed until the roller misses the inclined plane, therefore, when the hydraulic rod pulls the guide block to move back, the brake on the pumping unit can be released, but the roller does not roll to the inclined plane, the motor is powered on before the return of the guide block, meanwhile, the motor drives the drive wheel, the rotation of the drive wheel enables the main shaft to rotate through the main gear, the main shaft enables the two groups of drive rods to rotate through the driven shaft through the gear, so that the pumping unit works again until the pumping rod of the pumping unit is located at a proper position, and therefore, the overhaul of a worker on the pumping rod is facilitated.
Drawings
FIG. 1 is a front view of the structure of the present invention;
FIG. 2 is a schematic view of a structural braking device of the present invention;
FIG. 3 is a first cross-sectional view of the brake apparatus of the present invention;
FIG. 4 is a second cross-sectional view of the structural brake apparatus of the present invention;
FIG. 5 is an enlarged view taken at A in FIG. 4;
FIG. 6 is a schematic view of the assembly of the crank, the driving wheel and the pulley according to the present invention;
FIG. 7 is an assembly diagram of the main shaft, the brake wheel, the arc block and the transmission mechanism of the structure of the invention.
In the figure: 1. a pumping unit base; 2. a brake device; 3. a drive rod; 4. a crank balance weight; 5. a connecting rod; 6. a walking beam; 201. a housing; 202. a main gear; 203. a slave gear; 204. a driven shaft; 205. a main shaft; 206. a drive mechanism; 207. a brake mechanism; 208. a rectangular hole; 209. a hydraulic lever; 2061. a drive block; 2062. a guide block; 2063. a curved bar; 2064. a first shaft; 2065. mounting grooves; 2066. a drive wheel; 2067. a pulley; 26. an anti-slip sleeve; 27. a roller; 28. a second shaft; 2071. a brake wheel; 2072. an arc-shaped block; 2073. a brake pad; 2074. a transmission mechanism; 2075. a bearing plate; 2076. a guide post; 2077. a spring; 29. a cam; 30. a pinion gear; 31. a third shaft; 32. an L-shaped rack.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 7, the present invention provides a technical solution: a hydraulic brake system of an oil pumping unit comprises an oil pumping unit base 1, wherein a brake device 2 with a driving function is arranged on the oil pumping unit base 1, two groups of driving rods 3 are symmetrically arranged on two sides of the brake device 2, a crank balance block 4 is arranged on each driving rod 3, a connecting rod 5 is arranged on each crank balance block 4, and a walking beam 6 is arranged on each connecting rod 5; the brake device 2 comprises a shell 201, a main gear 202 is arranged in the shell 201, the middle of the main gear 202 is connected with a main shaft 205, the main gear 202 is meshed with a driven gear 203, the middle of the driven gear 203 is connected with a driven shaft 204, two groups of driving rods 3 are fixedly connected with two ends of the driven shaft 204, the main shaft 205 is driven by a power device on the pumping unit, therefore, when the main shaft 205 rotates, the main shaft 205 rotates the driven gear 203 through the main gear 202, and the driven gear 203 rotates the two groups of driving rods 3 through the driven shaft 204, thereby enabling the pumping unit to work;
one end of a main shaft 205 is provided with a brake mechanism 207, the brake mechanism 207 is provided with a driving mechanism 206, one side of a shell 201 is provided with a rectangular hole 208, one side of the shell 201 is fixedly connected with a hydraulic rod 209, a third bearing is arranged on the main shaft 205 and is embedded into the shell 201, two groups of fourth bearings are arranged at two ends of a driven shaft 204 and are embedded into the shell 201, the brake mechanism 207 comprises a brake wheel 2071, the middle part of the brake wheel 2071 is connected with the main shaft 205, two groups of arc-shaped blocks 2072 are symmetrically arranged in the brake wheel 2071, a brake pad 2073 is arranged on each arc-shaped block 2072, a transmission mechanism 2074 is arranged between the two groups of arc-shaped blocks 2072, one side of each arc-shaped block 2072 is fixedly connected with a bearing plate 2075, the bearing plate 2075 is slidably connected with a guide post 2076, a spring 2077 is sleeved on each guide post 2076, the transmission mechanism 2074 comprises a cam 29, a connecting shaft three 31 is arranged at the middle part of the cam 29, one end of the shaft three 31 is connected with a pinion 30, the pinion 30 is engaged with an L-shaped rack 32, one end of the L-shaped rack 2062 is fixedly connected with a guide block 2062, one end of the third shaft 31 is provided with a bearing which is embedded into the shell 201, the brake wheel 2071 is rotationally connected with two sets of driving wheels 2066, the guide post 2076 is provided with an upright bearing which is embedded into the bearing plate 2075, the guide block 2062 is slidably connected with the rectangular hole 208, the guide block 2062 is fixedly connected with the hydraulic rod 209, when the pumping unit needs to be braked, the hydraulic rod 209 pushes the guide block 2062 to move along the rectangular hole 208, the guide block 2062 drives the L-shaped rack 32 to move, the L-shaped rack 32 is engaged with the pinion 30 along with the movement of the L-shaped rack 32 to enable the pinion 30 to rotate, the pinion 30 enables the cam 29 to rotate through the third shaft 31, the cam 29 rotates to enable two sets of bulges on the cam 29 to extrude the two sets of arc blocks 2072, the arc blocks 2072 drives the bearing plate 2075 to rotate along the guide post 2076, and the bearing plate 2075 compresses the spring 2077 until the arc blocks 2072 push the brake plate 2073 to extrude the inner ring of the brake wheel 2071, so as to form friction force on the brake plate 2073, stopping the brake wheel 2071, stopping the main shaft 205 while the brake wheel 2071 cannot rotate, and further stopping the oil pumping unit;
the driving mechanism 206 comprises a driving block 2061, the driving block 2061 is connected with a guide block 2062, two groups of curved rods 2063 are symmetrically arranged at two sides of the driving block 2061, two groups of mounting grooves 2065 are arranged at two ends of the curved rods 2063, the middle part of the curved rods 2063 is connected with a shaft I2064, a driving wheel 2066 is arranged in one group of the mounting grooves 2065, a pulley 2067 is arranged in the other group of the mounting grooves 2065, the driving wheel 2066 comprises a roller 27, an anti-skidding sleeve 26 is sleeved on the roller 27, the middle part of the roller 27 is connected with a shaft II 28, two groups of bearings are arranged at two ends of the shaft II, the bearings are embedded in the curved rods 2063, two groups of bearings are arranged at two ends of the shaft II, the bearings are embedded in the shell 201, two groups of inclined planes are symmetrically arranged at the end parts of the driving block 1, the roller 27 is rotatably connected with the inclined planes, the anti-skidding sleeve 26 is made of 207elastic rubber, anti-skidding threads are arranged on the outer ring of the braking wheel 1, the friction force between the anti-skid sleeve 26 and the brake wheel 2071 is increased, one end of the second shaft 28 is connected with a motor, the motor is not electrified, when the hydraulic rod 209 pushes the guide block 2062 to move, the guide block 2062 simultaneously drives the drive block 2061 to move, the drive block 2061 moves to enable the roller 27 to rotate along the inclined plane arranged at the end part of the drive block 2061, the roller 27 is simultaneously extruded by the drive block 2061 when rotating, so that the drive wheel 2066 at the other end of the curved rod 2063 continuously extrudes the brake wheel 2071 to enable the anti-skid sleeve 26 to be pressed and deformed, the friction force between the anti-skid sleeve 26 and the brake wheel 2071 is increased until the roller 27 misses the inclined plane, therefore, when the hydraulic rod 209 pulls the guide block 2062 to move back, the braking on the pumping unit is released, but the roller 27 does not roll to the inclined plane, the motor is electrified before the guide block 2062 returns, the rotation of the drive wheel 2066 is driven by the motor simultaneously, the rotation of the drive wheel 2066 enables the main shaft 205 to rotate, the main shaft 205 enables the secondary gear 203 to rotate through the main gear 202, the two groups of driving rods 3 are rotated by the driven shaft 204 from the gear 203, so that the pumping unit works again until the sucker rod of the pumping unit is in a proper position, and the sucker rod is convenient to overhaul by workers.
The working principle is as follows: in the using process, when the pumping unit needs to be braked, the hydraulic rod 209 pushes the guide block 2062 to move along the rectangular hole 208, the guide block 2062 drives the L-shaped rack 32 to move, the L-shaped rack 32 is meshed with the pinion 30 along with the movement of the L-shaped rack 32, the pinion 30 rotates the pinion 30, the cam 29 is rotated by the pinion 30 through the shaft three 31, the cam 29 rotates, two sets of protrusions on the cam 29 extrude two sets of arc blocks 2072, the arc blocks 2072 drive the bearing plate 2075 to rotate along the guide post 2076, the bearing plate 2075 compresses the spring 2077 until the arc blocks 2072 push the brake pads 2073 to extrude the inner ring of the brake wheel 2071, friction force is formed on the brake pads 2073 to stop the brake wheel 2071, when the hydraulic rod 209 pushes the guide block 2062 to move, the guide block 2061 simultaneously drives the driving block 2061 to move, the driving block 2061 moves to make the roller 27 rotate along the inclined plane arranged at the end of the driving block 2061, the roller 27 is extruded while being rotated by the driving block 2061, before the guide block 2062 is reset, the motor is electrified, the motor drives the driving wheel 2066, the main shaft 205 is rotated by the rotation of the driving wheel 2066, the main shaft 205 rotates the driven gear 203 through the main gear 202, and the driven gear 203 rotates the two groups of driving rods 3 through the driven shaft 204, so that the pumping unit works again.
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 beam-pumping unit hydraulic braking system, includes beam-pumping unit base (1), its characterized in that: the oil pumping unit is characterized in that a brake device (2) with a driving function is arranged on the oil pumping unit base (1), two groups of driving rods (3) are symmetrically arranged on two sides of the brake device (2), a crank balance block (4) is arranged on each driving rod (3), a connecting rod (5) is arranged on each crank balance block (4), and a walking beam (6) is arranged on each connecting rod (5);
brake equipment (2) includes shell (201), set up master gear (202) in shell (201), main gear (202) middle part is connected main shaft (205), and master gear (202) meshing is followed gear (203), connect driven shaft (204) from gear (203) middle part, main shaft (205) one end sets up brake mechanism (207), set up actuating mechanism (206) on brake mechanism (207), shell (201) one side sets up rectangular hole (208), shell (201) one side fixed connection hydraulic stem (209), set up bearing three on main shaft (205), bearing three imbeds shell (201), driven shaft (204) both ends set up two sets of bearings four, and bearing four imbeds shell (201).
2. The hydraulic brake system of the oil pumping unit according to claim 1, characterized in that: actuating mechanism (206) is including drive block (2061), guide block (2062) is connected in drive block (2061), and drive block (2061) bilateral symmetry sets up two sets of curved bars (2063), curved bar (2063) both ends set up two sets of mounting grooves (2065), and curved bar (2063) middle part connecting axle one (2064), a set of set up drive wheel (2066) in mounting groove (2065), another group set up pulley (2067) in mounting groove (2065).
3. The hydraulic brake system of the oil pumping unit according to claim 2, characterized in that: the driving wheel (2066) comprises a roller (27), an anti-skidding sleeve (26) is sleeved on the roller (27), the middle of the roller (27) is connected with a second shaft (28), two groups of bearings are arranged at two ends of the second shaft (28), and the bearings are embedded into a curved rod (2063).
4. The hydraulic brake system of the oil pumping unit according to claim 1, characterized in that: brake mechanism (207) are including braked wheel (2071), main shaft (205) is connected at braked wheel (2071) middle part, and the symmetry sets up two sets of arc piece (2072) in braked wheel (2071), set up brake block (2073) on arc piece (2072), it is two sets of set up drive mechanism (2074) between arc piece (2072), arc piece (2072) one side fixed connection accepts board (2075), accept board (2075) sliding connection guide pillar (2076), spring (2077) are established to the cover on guide pillar (2076).
5. The hydraulic brake system of the oil pumping unit according to claim 4, characterized in that: the transmission mechanism (2074) comprises a cam (29), the middle of the cam (29) is connected with a shaft III (31), one end of the shaft III (31) is connected with a pinion (30), the pinion (30) is meshed with an L-shaped rack (32), one end of the L-shaped rack (32) is fixedly connected with a guide block (2062), one end of the shaft III (31) is provided with a bearing, and the bearing is embedded into the shell (201).
6. The hydraulic brake system of the oil pumping unit according to claim 2, characterized in that: pulley (2067) middle part connecting axle four, pulley (2067) sliding connection drive block (2061), four both ends of axle set up two sets of bearings one, and bearing one imbeds curved bar (2063), axle one (2064) one end sets up bearing two, and bearing two imbeds shell (201), guide block (2062) sliding connection rectangular hole (208), guide block (2062) fixed connection hydraulic stem (209).
7. The hydraulic brake system of the oil pumping unit according to claim 4, characterized in that: the brake wheel (2071) is rotatably connected with two groups of driving wheels (2066), the guide post (2076) is provided with an upright bearing, and the upright bearing is embedded into the bearing plate (2075).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210364401.XA CN114575788B (en) | 2022-04-08 | 2022-04-08 | Hydraulic brake system of oil pumping unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210364401.XA CN114575788B (en) | 2022-04-08 | 2022-04-08 | Hydraulic brake system of oil pumping unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114575788A true CN114575788A (en) | 2022-06-03 |
| CN114575788B CN114575788B (en) | 2023-12-15 |
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ID=81784468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210364401.XA Active CN114575788B (en) | 2022-04-08 | 2022-04-08 | Hydraulic brake system of oil pumping unit |
Country Status (1)
| Country | Link |
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| CN (1) | CN114575788B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114809994A (en) * | 2022-06-18 | 2022-07-29 | 山东金周石油装备开发有限公司 | Oil pumping machine with automatic detection device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1792617A (en) * | 1929-06-01 | 1931-02-17 | Emsco Derrick & Equip Co | Screw-type brake-operating mechanism for draw works |
| CN207195503U (en) * | 2017-12-27 | 2018-04-06 | 大庆市天德忠石油科技有限公司 | Brake gear assembly on beam pumping unit |
| CN109098697A (en) * | 2018-09-26 | 2018-12-28 | 西安鹏瑞石油科技有限公司 | oil well intelligent brake control system |
| CN114017451A (en) * | 2021-09-29 | 2022-02-08 | 大庆师范学院 | Beam-pumping unit braking system based on computer control |
-
2022
- 2022-04-08 CN CN202210364401.XA patent/CN114575788B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1792617A (en) * | 1929-06-01 | 1931-02-17 | Emsco Derrick & Equip Co | Screw-type brake-operating mechanism for draw works |
| CN207195503U (en) * | 2017-12-27 | 2018-04-06 | 大庆市天德忠石油科技有限公司 | Brake gear assembly on beam pumping unit |
| CN109098697A (en) * | 2018-09-26 | 2018-12-28 | 西安鹏瑞石油科技有限公司 | oil well intelligent brake control system |
| CN114017451A (en) * | 2021-09-29 | 2022-02-08 | 大庆师范学院 | Beam-pumping unit braking system based on computer control |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114809994A (en) * | 2022-06-18 | 2022-07-29 | 山东金周石油装备开发有限公司 | Oil pumping machine with automatic detection device |
| CN114809994B (en) * | 2022-06-18 | 2023-06-06 | 山东金周石油装备开发有限公司 | Pumping unit with automatic detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114575788B (en) | 2023-12-15 |
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