CN114645693A - Horse head assembly for pumping unit - Google Patents
Horse head assembly for pumping unit Download PDFInfo
- Publication number
- CN114645693A CN114645693A CN202210500649.4A CN202210500649A CN114645693A CN 114645693 A CN114645693 A CN 114645693A CN 202210500649 A CN202210500649 A CN 202210500649A CN 114645693 A CN114645693 A CN 114645693A
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- CN
- China
- Prior art keywords
- horse head
- connecting rod
- hinged
- walking beam
- fixed
- 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.)
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- 241001023788 Cyttus traversi Species 0.000 title claims abstract description 89
- 238000005086 pumping Methods 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 239000010720 hydraulic oil Substances 0.000 claims description 13
- 230000007704 transition Effects 0.000 claims description 3
- 239000003129 oil well Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 10
- 241000283074 Equus asinus Species 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Transmission Devices (AREA)
Abstract
The invention belongs to the technical field of oil field operation devices, and provides a horse head assembly for a pumping unit, wherein the pumping unit is provided with a base, a support frame, a driving motor and a reduction gearbox are fixed on the base, the driving motor is connected with the reduction gearbox through a belt, an output shaft of the reduction gearbox is connected with a crank, a balance block is arranged on the crank, a connecting rod is hinged on the crank and is hinged with one end of a walking beam, the walking beam is rotatably supported on the support frame, the other end of the walking beam is fixedly provided with a horse head, a rope hanger is connected below the horse head, the walking beam is provided with a top plate, a bottom plate and two side plates, the two side plates are symmetrically arranged between the top plate and the bottom plate, the side plates are respectively welded with the top plate and the bottom plate, and a connecting seat is formed at one end of the walking beam and is used for hinging the horse head. Compared with the prior art, the invention has the following beneficial effects: when the oil well needs to be maintained, the horsehead above the oil well is rotated and moved away, and meanwhile, the problem that the horsehead deflects to one side to cause the torsion of the walking beam in the prior art can be solved.
Description
Technical Field
The invention belongs to the technical field of petroleum oil field operation devices, belongs to tools for pumping units, and particularly relates to a horse head assembly for a pumping unit.
Background
The beam-pumping unit is the pumping unit type that the oil field applied quantity is the most, distributes the widest, and the major structure includes: the oil pumping unit horse head is formed by assembling and welding steel plates and is matched with the front arm of the walking beam through a horse head pin.
The connection mode of horse head and walking beam among the prior art has three kinds: the horse head side rotating mechanism comprises a rotating shaft type horse head side rotating mechanism, a dismounting type horse head side rotating mechanism and three pin shafts. It can be seen from the above arrangement mode that the horse head is deviated to one side of the cross beam in the prior art, so that the tension borne by one side of the cross beam is large, and the connection stability between the horse head and the cross beam and between the cross beam and the supporting frame can be damaged.
Meanwhile, in the prior art, the steel wire rope is fixedly connected with the horse head, so that the steel wire rope is inconvenient to move normally.
Disclosure of Invention
In view of the above technical problems, the present invention is a horse head assembly for a pumping unit, which is intended to overcome the above problems occurring in the prior art.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a horse head assembly for an oil pumping unit is provided with a base 1, a support frame 2, a driving motor 3 and a reduction gearbox 5 are fixed on the base 1, the driving motor 3 is connected with a reduction gearbox 5 through a belt 4, an output shaft of the reduction gearbox 5 is connected with a crank 6, a balance weight 7 is arranged on the crank 6, a connecting rod 8 is hinged on the crank 6, the connecting rod 8 is hinged with one end of a walking beam 9, the walking beam 9 is rotatably supported on the supporting frame 2, a horse head 10 is fixed at the other end of the walking beam 9, a rope hanger 11 is connected below the horse head 10, the walking beam 9 is provided with a top plate 91, a bottom plate 92 and two side plates 93, the side plates 93 are provided with two, and are symmetrically arranged between the top plate 91 and the bottom plate 92, the side plates 93 are respectively welded with the top plate 91 and the bottom plate 92, a connecting seat 94 is formed at one end of the walking beam 9, and the connecting seat 94 is used for hinging the horse head 10.
Further, the horse head 10 comprises a left horse head 121 and a right horse head 131 which are symmetrically arranged, the rear side of the left horse head 121 forms a left connecting head 122, the left side of the left horse head 121 is fixed with a left first articulated seat 123, the left side of the walking beam 9 is fixed with a left second articulated seat 124, a left third hinge base 125 is fixed on the walking beam 9 between the left first hinge base 123 and the left second hinge base 124, the left first hinge base 123 is hinged with a left first connecting rod 126, the left second hinge base 124 is hinged with a left hydraulic oil cylinder 128, a left second connecting rod 127 is hinged to the left third hinge base 125, the end parts of the left first connecting rod 126, the left second connecting rod 127 and the left hydraulic oil cylinder 128 are hinged to a left connecting rod 129, the left connecting head 122 rotatably arranges the left horse head 121 on the left connecting head 122 through a left connecting column 1210, and a left rope fixing disc 1211 is fixed above the left horse head 121;
the rear side of right donkey head 131 forms right connector 132, the right side of right donkey head 131 is fixed with right first articulated seat 133, the right side of walking beam 9 is fixed with right second articulated seat 134 right first articulated seat 133 with be fixed with right third articulated seat 135 on the walking beam 9 between the second articulated seat 134 on the right side, it has right first connecting rod 136 to articulate on the first articulated seat 133 of the right side, it has right hydraulic cylinder 138 to articulate on the second articulated seat 134 of the right side, it has right second connecting rod 137 to articulate on the third articulated seat 135 of the right side, the tip of right first connecting rod 136, right second connecting rod 137 and right hydraulic cylinder 138 is articulated with right connecting rod 139, right connector 132 sets up right donkey head 131 rotatable on right 132 through right spliced pole 1310, the top of right donkey head 131 is fixed with right fixed rope dish 1311.
Further, the pumping unit is also provided with a brake device 18.
Further, the left rope fixing disc 1211 and the right rope fixing disc 1311 have the same structure and are provided with rope fixing disc bodies 15, curved arc-shaped holes 16 are formed in the rope fixing disc bodies 15, the arc-shaped holes 16 are through holes, clamping pieces 17 are symmetrically arranged on the steel wire rope 14, and the clamping pieces 17 can be clamped at openings of the arc-shaped holes 16 of the left rope fixing disc 1211 and the right rope fixing disc 1311 respectively to limit the rope hanger 11 to be located on the same horizontal plane.
Further, a transition arc is formed at the opening of the arc-shaped hole 16.
Further, joint spare 17 includes joint spare body 171, joint spare body 171 is the ellipsoid, follows through-hole 172 has been seted up to the major axis direction of joint spare body 171, the equipartition has recess 173 on the joint spare body 171, be provided with slide rail 174 along the major axis direction in the recess 173, the one end of slide rail 174 sets up stopper 175, and the other end sets up fixed block 176, slidable sets up slider 178 in the slide rail 174, slider 178 is fixed with fixed block 176 through spring 177, the articulated bracing piece 179 of lower extreme of recess 173, rotatable connection slide bar 1710 on the slider 178, the bracing piece 179 tip with the tip of slide bar 1710 articulates each other.
Compared with the prior art, the invention has the following beneficial effects:
the original horse head is provided with a left horse head and a right horse head which are bilaterally symmetrical, the left horse head and the right horse head are respectively arranged to rotate around a walking beam, and a device for driving the left horse head and the right horse head to rotate is formed by an oil cylinder and a connecting rod; according to the invention, the clamping piece is arranged on the steel wire rope, the steel wire rope is clamped at the opening of the arc-shaped hole through the clamping piece, the clamping piece is arranged to be capable of adjusting the position on the steel wire rope, and the rope hanger below the steel wire rope is convenient to adjust.
Drawings
FIG. 1 is a schematic diagram of a prior art pumping unit;
FIG. 2 is a first structural diagram of a front mechanism of the pumping unit of the present invention;
FIG. 3 is an enlarged view of the portion A of FIG. 2 according to the present invention;
FIG. 4 is a schematic structural diagram II of a front mechanism of the pumping unit of the present invention;
FIG. 5 is a top plan view of FIG. 2 of the present invention;
FIG. 6 is a schematic view of the horse head of FIG. 5 of the present invention opened;
FIG. 7 is an enlarged view of portion B of FIG. 5 in accordance with the present invention;
FIG. 8 is an open state view of the clip of the present invention;
FIG. 9 is a close-up view of the clip of the present invention;
in the figure, a base 1, a support frame 2, a driving motor 3, a belt 4, a reduction gearbox 5, a crank 6, a balance weight 7, a connecting rod 8, a walking beam 9, a top plate 91, a bottom plate 92, a side plate 93, a connecting seat 94, a horse head 10, a rope hanger 11, a rope hanger,
A left horse head 121, a left connector 122, a left first hinge seat 123, a left second hinge seat 124, a left third hinge seat 125, a left first connecting rod 126, a left second connecting rod 127, a left hydraulic oil cylinder 128, a left connecting rod 129, a left connecting column 1210, a left rope fixing disc 1211, a left connecting rod 124, a left first connecting rod 126, a left second connecting rod 127, a left hydraulic oil cylinder 128, a left connecting rod 129, a left connecting column 1210, a left rope fixing disc 1211, a left connecting rod 124, a left second connecting rod 125, a left second connecting rod, a left connecting rod, a right connecting rod, a left connecting rod, a right, a left connecting rod, a right connecting rod, a left connecting rod, a right connecting rod, a left connecting rod, a right connecting rod,
A right horse head 131, a right connector 132, a right first hinge seat 133, a right second hinge seat 134, a right third hinge seat 135, a right first connecting rod 136, a right second connecting rod 137, a right hydraulic oil cylinder 138, a right connecting rod 139, a right connecting column 1310, a right rope fixing disc 1311, a left connecting rod, a right connecting rod, a left connecting rod, a right connecting rod, a left connecting rod and a right connecting rod,
The brake device comprises a steel wire rope 14, a rope fixing disc body 15, an arc-shaped hole 16, a clamping piece 17, a clamping piece body 171, a through hole 172, a groove 173, a sliding rail 174, a limiting block 175, a fixing block 176, a spring 177, a sliding block 178, a supporting rod 179, a sliding rod 1710 and a brake device 18.
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.
In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "disposed," "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected or detachably connected; may be a mechanical connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
As shown in fig. 1, the oil pumping unit for the oil field is provided with a base 1, a support frame 2 is fixed on the base 1, a driving motor 3 and a reduction gearbox 5, the driving motor 3 is connected with the reduction gearbox 5 through a belt 4, an output shaft of the reduction gearbox 5 is connected with a crank 6, a balance weight 7 is arranged on the crank 6, a connecting rod 8 is hinged on the crank 6, the connecting rod 8 is hinged with one end of a walking beam 9, the walking beam 9 is rotatably supported on the support frame 2, a horse head 10 is fixed at the other end of the walking beam 9, a rope hanger 11 is connected below the horse head 10, and a brake device 18 is further arranged on the oil pumping unit.
As can be seen from fig. 2 and 4, the walking beam 9 has a top plate 91, a bottom plate 92 and two side plates 93, the two side plates 93 are symmetrically arranged between the top plate 91 and the bottom plate 92, the side plates 93 are respectively welded with the top plate 91 and the bottom plate 92, a connecting seat 94 is formed at one end of the walking beam 9, and the connecting seat 94 is used for hinging the horse head 10.
As shown in fig. 3, 5 and 6, the horse head 10 includes a left horse head 121 and a right horse head 131 which are symmetrically arranged, and a gap is left on a side plate at a junction of the left horse head and the right horse head through which the steel wire rope 14 passes, so as to facilitate the placement of the steel wire rope 14. The rear side of the left horse head 121 forms a left connecting head 122, a left first hinge seat 123 is fixed on the left side of the left horse head 121, a left second hinge seat 124 is fixed on the left side of the walking beam 9, a left third hinge seat 125 is fixed on the walking beam 9 between the left first hinge seat 123 and the left second hinge seat 124 and is arranged behind the connecting seat 94, a left first connecting rod 126 is hinged on the left first hinge seat 123, a left hydraulic oil cylinder 128 is hinged on the left second hinge seat 124, a left second connecting rod 127 is hinged on the left third hinge seat 125, the end parts of the left first connecting rod 126, the left second connecting rod 127 and the left hydraulic oil cylinder 128 are hinged with a left connecting rod 129, the left connecting head 122 rotatably arranges the left horse head 121 on the left connecting head 122 through the left connecting rod 1210, and a left rope fixing disc 1211 is fixed above the left horse head 121. As can be seen from fig. 5 and 6, the same opening device of the right horse head is the same as that of the left horse head, the rear side of the right horse head 131 forms a right connecting head 132, the right side of the right horse head 131 is fixed with a right first hinge seat 133, the right side of the walking beam 9 is fixed with a right second hinge seat 134, a right third hinge seat 135 is fixed to the walking beam 9 between the right first hinge seat 133 and the right second hinge seat 134, and the right third hinged seat is arranged at the rear of the connecting seat 94, the right first hinged seat 133 is hinged with a right first connecting rod 136, the right second hinged seat 134 is hinged with a right hydraulic oil cylinder 138, the right third hinged seat 135 is hinged with a right second connecting rod 137, the end parts of the right first connecting rod 136, the right second connecting rod 137 and the right hydraulic oil cylinder 138 are hinged with a right connecting rod 139, the right connecting head 132 rotatably arranges the right horse head 131 on the right connecting head 132 through the right connecting rod 1310, and a right rope fixing disc 1311 is fixed above the right horse head 131. According to the invention, the original horse head is provided with the left horse head and the right horse head which are bilaterally symmetrical, the left horse head and the right horse head are respectively arranged to rotate around the walking beam, and the device for driving the left horse head and the right horse head to rotate is formed by the oil cylinder and the connecting rod, so that when an oil well needs to be maintained, the horse head above the oil well is rotated and removed, and meanwhile, the problem that the walking beam is twisted due to the fact that the horse head deflects to one side in the prior art can be solved.
The left rope fixing disc 1211 and the right rope fixing disc 1311 are identical in structure, and as shown in fig. 6 and 7, both the left rope fixing disc 1211 and the right rope fixing disc 1311 are provided with a rope fixing disc body 15, a curved arc-shaped hole 16 is formed inside the rope fixing disc body 15, the arc-shaped hole 16 is a through hole, clamping pieces 17 are symmetrically arranged on the steel wire rope 14, the symmetrical clamping pieces 17 can be respectively clamped at openings of the arc-shaped holes 16 of the left rope fixing disc 1211 and the right rope fixing disc 1311 so as to limit the rope hanger 11 to be located on the same horizontal plane, and a transition arc is formed at the opening of the arc-shaped hole 16.
By fig. 8, 9 shows, joint 17 includes joint body 171, joint body 171 is the ellipsoid, through-hole 172 has been seted up along the major axis direction of joint body 171, the equipartition has recess 173 on the joint body 171, be provided with slide rail 174 along the major axis direction in the recess 173, the one end of slide rail 174 sets up stopper 175, the other end sets up fixed block 176, slidable sets up slider 178 in the slide rail 174, slider 178 is fixed with fixed block 176 through spring 177, the articulated bracing piece 179 of lower extreme of recess 173, rotatable connection slide bar 1710 on the slider 178, the tip of bracing piece 179 tip and the tip of slide bar 1710 articulate each other. According to the invention, the clamping piece is arranged on the steel wire rope 14, the steel wire rope 14 is clamped at the opening of the arc-shaped hole through the clamping piece, the clamping piece is arranged to be capable of adjusting the position on the steel wire rope 14, and the rope hanger 11 below the steel wire rope 14 is convenient to adjust.
The clamping pieces 17 are symmetrically arranged on the steel wire rope 14, namely the directions of the two clamping pieces 17 are opposite, the clamping pieces 17 are installed when the horse head is in the state shown in figure 5, meanwhile, the heights of the rope suspenders 11 are ensured to be the same, and in combination with figures 5 and 7, at the moment, the two clamping pieces 17 are respectively abutted against the openings of the left rope fixing disc and the right rope fixing disc, and the supporting rods 179 on the clamping pieces 17 are in an open state; when the steel wire rope 14 needs to be detached, the rope hanger 11 is detached firstly, then the support rod 179 is pressed manually, the clamping piece 17 is in the state shown in fig. 9, the clamping piece 17 is inserted into the arc-shaped hole, one end of the steel wire rope 14 is pulled, and the steel wire rope 14 is pulled out completely.
Finally, it should be noted that the oil cylinder, the motor and the like in the present invention all have accessories for driving the oil cylinder, the motor and the like to move normally, but the invention is not described in the technical scheme of the known means for highlighting the invention, so it should be clear to those skilled in the art that the control operation mode which is not described should be described in the prior art.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a horse head assembly for beam-pumping unit, the beam-pumping unit has base (1), be fixed with support frame (2), driving motor (3) and reducing gear box (5) on base (1), driving motor (3) pass through belt (4) and connect reducing gear box (5), output shaft crank (6) of reducing gear box (5), be provided with balancing piece (7) on crank (6), it has connecting rod (8) to articulate on crank (6), connecting rod (8) are articulated with the one end of walking beam (9), the rotatable support of walking beam (9) is on support frame (2), the other end of walking beam (9) is fixed with horse head (10), rope hanger (11), its characterized in that are connected to the below of horse head (10): walking beam (9) have roof (91), bottom plate (92) and curb plate (93), curb plate (93) have two, and the symmetry sets up between roof (91) and bottom plate (92), curb plate (93) weld with roof (91) and bottom plate (92) respectively the one end of walking beam (9) is formed with connecting seat (94), connecting seat (94) are used for articulated horse head (10).
2. A horse head assembly for a pumping unit according to claim 1, wherein: the horse head (10) comprises a left horse head (121) and a right horse head (131) which are symmetrically arranged,
the rear side of the left horse head (121) forms a left connector (122), the left side of the left horse head (121) is fixed with a left first hinge seat (123), the left side of the walking beam (9) is fixed with a left second hinge seat (124), a left third hinge seat (125) is fixed on the walking beam (9) between the left first hinge seat (123) and the left second hinge seat (124), a left first connecting rod (126) is hinged on the left first hinge seat (123), a left hydraulic oil cylinder (128) is hinged on the left second hinge seat (124), a left second connecting rod (127) is hinged on the left third hinge seat (125), the end parts of the left first connecting rod (126), the left second connecting rod (127) and the left hydraulic oil cylinder (128) are hinged with a left connecting rod (129), the left connector (122) can rotatably set the left horse head (121) on the left connector (122) through a left connecting column (1210), a left rope fixing disc (1211) is fixed above the left horse head (121);
the rear side of the right horse head (131) forms a right connector (132), the right side of the right horse head (131) is fixed with a right first hinged seat (133), the right side of the walking beam (9) is fixed with a right second hinged seat (134), a right third hinged seat (135) is fixed on the walking beam (9) between the right first hinged seat (133) and the right second hinged seat (134), a right first connecting rod (136) is hinged on the right first hinged seat (133), a right hydraulic oil cylinder (138) is hinged on the right second hinged seat (134), a right second connecting rod (137) is hinged on the right third hinged seat (135), the end parts of the right first connecting rod (136), the right second connecting rod (137) and the right hydraulic oil cylinder (138) are hinged with a right connecting rod (139), the right connector (132) can rotatably set the right horse head (131) on the right connector (132) through a right connecting rod (1310), a right rope fixing disc (1311) is fixed above the right horse head (131).
3. A horse head assembly for a pumping unit according to claim 2, wherein: and the pumping unit is also provided with a brake device (18).
4. A horse head assembly for a pumping unit according to claim 2, wherein: the left rope fixing disc (1211) and the right rope fixing disc (1311) are identical in structure and are provided with rope fixing disc bodies (15), curved arc-shaped holes (16) are formed in the rope fixing disc bodies (15), the arc-shaped holes (16) are through holes, clamping pieces (17) are symmetrically arranged on the steel wire ropes (14), and the clamping pieces (17) can be clamped at openings of the arc-shaped holes (16) of the left rope fixing disc (1211) and the right rope fixing disc (1311) respectively to limit a rope hanger (11) to be located on the same horizontal plane.
5. A horse head assembly for a pumping unit according to claim 4, wherein: transition arcs are formed at the openings of the arc-shaped holes (16).
6. A horse head assembly for a pumping unit according to claim 4, wherein: joint spare (17) are including joint spare body (171), joint spare body (171) are the ellipsoid, follow through-hole (172) have been seted up to the major axis direction of joint spare body (171), the equipartition has recess (173) on joint spare body (171), be provided with slide rail (174) along the major axis direction in recess (173), the one end of slide rail (174) sets up stopper (175), and the other end sets up fixed block (176), slidable sets up slider (178) in slide rail (174), slider (178) are fixed with fixed block (176) through spring (177), the articulated bracing piece (179) of lower extreme of recess (173), rotatable connection slide bar (1710) is gone up in slider (178), bracing piece (179) tip with the tip of slide bar (1710) articulates each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210500649.4A CN114645693A (en) | 2022-05-10 | 2022-05-10 | Horse head assembly for pumping unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210500649.4A CN114645693A (en) | 2022-05-10 | 2022-05-10 | Horse head assembly for pumping unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114645693A true CN114645693A (en) | 2022-06-21 |
Family
ID=81997676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210500649.4A Withdrawn CN114645693A (en) | 2022-05-10 | 2022-05-10 | Horse head assembly for pumping unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114645693A (en) |
-
2022
- 2022-05-10 CN CN202210500649.4A patent/CN114645693A/en not_active Withdrawn
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| PB01 | Publication | ||
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Application publication date: 20220621 |