CN212079268U - Gear ring type non-beam pumping unit - Google Patents

Gear ring type non-beam pumping unit Download PDF

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Publication number
CN212079268U
CN212079268U CN201921670871.9U CN201921670871U CN212079268U CN 212079268 U CN212079268 U CN 212079268U CN 201921670871 U CN201921670871 U CN 201921670871U CN 212079268 U CN212079268 U CN 212079268U
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China
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tower
rope
gear
pumping unit
fixed
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CN201921670871.9U
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Inventor
卞和满
胡俊成
邢福林
闫俊
胡子斌
唐光亮
张文峰
杜宏伟
吴春勇
赵冰云
翁添天
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RONGSHENG MACHINERY MANUFACTURE Ltd OF HUABEI OILFIELD
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RONGSHENG MACHINERY MANUFACTURE Ltd OF HUABEI OILFIELD
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Abstract

The utility model relates to a gear ring type non-beam pumping unit, which comprises a base, a hinge seat is connected on the base; the bottom of the tower is detachably connected with the top of the base, and the side surface of the bottom of the tower is hinged with the hinge seat; one end of the hydraulic oil cylinder is connected with the hinge base, and the other end of the hydraulic oil cylinder is connected with the side surface of the tower; the tower frame is erected or laid down by extending or contracting the hydraulic oil cylinder; the speed reducer can be disassembled at the top of the tower frame; the input end of the speed reducer is in power connection with the output end of the motor; the gear mechanism comprises a gear and a gear ring which are meshed with each other, the gear is installed at the output end of the speed reducer, and the gear ring is fixed at the top end of the tower frame through a shaft seat; a rope wheel is fixed on the gear ring, and a lifting rope is wound on the rope wheel; the rope hanger assembly is connected with one end of the lifting rope; the other end of the lifting rope is connected with a counterweight component, and the counterweight component is fixed on the side surface of the tower frame. The utility model has the advantages of simple structure, light weight, low energy consumption, low cost, long service life of the steel wire rope and the like, and the pumping unit is moved and is convenient to install.

Description

Gear ring type non-beam pumping unit
Technical Field
The utility model relates to a beam-pumping unit technical field, more specifically the gear ring formula does not have beam-pumping unit that says so relates to.
Background
More than 80% of oil-gas field development is performed by using pumping units, and the pumping units in the oil field at present mainly comprise two types, namely beam pumping units and non-beam pumping units. The beam-pumping unit is dragged by an AC asynchronous motor to rotate a reduction gearbox, a crank and a connecting rod to drive the beam to swing up and down and drive a pumping rod and an underground oil well pump to do periodic reciprocating motion so as to realize the pumping, discharging and extracting functions of the beam-pumping unit. The beam pumping unit system has heavy equipment weight, large volume and large floor area, and also causes great resource waste. The common walking-beam-free pumping unit is also called a tower-type pumping unit (mainly has the types of mechanical reversing, electric control reversing and the like, the mechanical reversing has the defect of complicated structure, the electric control reversing type adopts a special motor, the cost of electric control equipment is high), for example, a permanent magnet type outer rotor motor with larger consumption is used for dragging, the dragging torque of the motor is related to the radius of a rotor, and therefore, the volume of the outer rotor motor is larger than that of a motor with the same power, and the manufacturing cost is high. Because the torque of the steel wire rope fixedly wound on the motor outer rotor roller is small, the load requirement of the oil pumping unit cannot be met, and the traction force of the steel wire rope needs to be increased through the pulley block. Therefore, the volume of the tower type pumping unit is relatively increased, the structural complexity is increased, and the operation reliability of the equipment is reduced.
At present, in oil and gas field exploitation, a plurality of low-permeability wells or wells with insufficient liquid supply amount exist, and an intermittent exploitation mode is required. If the pumping unit is installed on a well site, the exploitation cost is increased and the benefit is reduced due to low yield and the like. If the existing pumping unit needs to be transported to a wellhead needing drainage and production operation, the pumping unit needs to be disassembled, hoisted and transported to a new wellhead, and then reinstalled. The two types of pumping units are required to be installed on a fixed foundation, and the installation period is long and the cost is high. Is not suitable for moving and mounting back and forth. In view of the current situation, how to provide an oil pumping unit with a simple structure and convenient transportation and installation is an urgent problem to be solved by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the above-mentioned technical problem among the prior art to a certain extent at least.
Therefore, an object of the utility model is to provide a ring gear formula does not have beam-pumping unit, has solved the difficult installation of well exploitation beam-pumping unit that low infiltration well or supply liquid volume are not enough among the prior art, problem of installation cycle length.
The utility model provides a ring gear formula does not have beam-pumping unit, include:
the base is connected with a hinge seat;
the bottom of the tower is detachably connected with the top of the base, and the side surface of the bottom of the tower is hinged with the hinge seat;
one end of the hydraulic oil cylinder is connected with the hinge base, and the other end of the hydraulic oil cylinder is connected with the side face of the tower; the tower frame is erected or laid down by extending or contracting the hydraulic oil cylinder;
the speed reducer is detachably arranged at the top of the tower;
the input end of the speed reducer is in power connection with the output end of the motor;
the gear mechanism comprises a gear and a gear ring which are meshed with each other, the gear is installed at the output end of the speed reducer, and the gear ring is fixed at the top end of the tower frame through a shaft seat; a rope wheel is fixed on the gear ring, and a lifting rope is wound on the rope wheel;
the rope hanger assembly is connected with one end of the lifting rope;
the other end of the lifting rope is connected with the counterweight assembly, and the counterweight assembly is fixed on the side face of the tower frame.
According to the technical scheme, compared with the prior art, the utility model discloses a ring gear formula does not have beam-pumping unit, because the utility model discloses a motor switching-over, drive reducing gear box ware, gear engagement ring gear do just, reverse switching-over rotation, realize the suction row of beam-pumping unit and adopt the function, gear, ring gear and gear drive are adopted in this application, compare with ordinary pylon formula beam-pumping unit, have reduced reducing gear box overall dimension, saved external rotor motor and the assembly pulley of big moment of torsion, have advantages such as simple structure, light in weight, the energy consumption is low, the cost is low, wire rope long service life; because the base is provided with the hinge base, one end of the hydraulic oil cylinder is connected with the hinge base, and the other end of the hydraulic oil cylinder is connected with the side surface of the tower; the tower frame is erected or laid down by extending or contracting the hydraulic oil cylinder; the pumping unit is convenient to move and install.
Preferably, the tower is a truss structure formed by welding section steel and steel plates.
Preferably, an oil cylinder lug seat is arranged on the side face of the tower frame, and the other end of the hydraulic oil cylinder is connected to the oil cylinder lug seat through a pin shaft.
Preferably, the rope pulley comprises a left rope pulley and a right rope pulley, and the left rope pulley and the right rope pulley are integrally fixed with the gear ring; all have the grooving on it, have rope fastening clip on the grooving, in the lifting rope fag end is fixed in rope fastening clip, and twine on the rope sheave that corresponds. The rope sheave is fixed together with the gear ring, and the motor reversing operation drives the gear, and the gear drives the gear ring, and the gear ring drives the rope sheave, and the rope sheave drives the lifting rope reciprocating motion, has realized the suction row of beam-pumping unit and has adopted, has reduced the energy consumption.
Preferably, the counterweight assembly comprises a plurality of counterweights, a suspender, a quick-assembly suspender chuck and a bracket;
the first counterweight is fixed with a fast-assembly suspender chuck;
one end of the suspender is connected with the fast-assembly suspender chuck, and the other end of the suspender is connected with the lifting rope;
the support is used for supporting the balance weight and is connected with the tower.
Preferably, two groups of guide rails are arranged on the side surface of the tower, and the support is a roller frame on which rollers sliding along the guide rails are arranged. The guide rail is formed by welding steel pipes and section steel.
Preferably, a plurality of balanced weights are connected through the member that both ends have the whorl, have realized inserting fast and the effect of quick detach, and the quantity of balanced weight increases according to the load size of sucker rod in the pit, guarantees that power is balanced.
Preferably, a braking assembly for braking the counterweight assembly is also included. In order to prevent the sucker rod from breaking off and causing the rapid sliding down of the balance weight to damage equipment.
Preferably, the brake assembly comprises an electromagnetic brake disc, an auxiliary electromagnetic caliper disc and a caliper disc seat; the electromagnetic brake disc and the gear are coaxially fixed, the electromagnetic brake disc and the auxiliary electromagnetic caliper disc are electrically connected with an electric control system of the oil pumping unit to be matched for braking, the electromagnetic brake disc is fixed on the caliper disc seat, and the caliper disc seat is fixed on the tower. The auxiliary electromagnetic clamp disc can be 1 pair or more than 2 pairs, the auxiliary electromagnetic clamp disc is fixed on the clamp disc seat, and when the electric control system detects signals of the conditions of breaking and falling of the sucker rod and other sudden changes of load, the electromagnetic disc brake immediately loses power and brakes to enable the balance block to stop or slowly move downwards. The electromagnetic caliper disc adopts electric power failure for braking.
Preferably, the rope sheave pulley device further comprises a shield which covers the gear, the gear ring and the rope sheave in a closed space. The bottom of the protective cover can contain lubricating oil to lubricate components, so that the abrasion of the gear is reduced, and meanwhile, the protective cover can keep the lubricating oil clean.
The hinge base is fixedly connected to the pumping unit base, the tower is hinged to the hinge base through the supporting lug base on the side face, the hinge lug hole for mounting the hydraulic oil cylinder (or the spiral screw rod) is formed in the lower portion of the hinge base, and one end of the hydraulic oil cylinder (or the spiral screw rod) is connected with the hinge base. The other end of the oil cylinder is connected with an oil cylinder lug on the side surface of the tower frame, when the oil pumping unit needs to move to a new wellhead, the piston of the hydraulic oil cylinder retracts, and the tower frame of the oil pumping unit can be integrally placed on the base, so that the integral hoisting and transportation are facilitated. When a well needs to be repaired, a piston cylinder (or a screw lead screw) of the hydraulic oil cylinder slightly retracts, and the large gear ring and the rope pulley tilt backwards for a certain angle, so that the position of a well head can be kept away, and the well repairing operation is facilitated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic perspective view of a ring gear type non-beam pumping unit according to the present invention;
fig. 2 is a partial view of a ring gear type walking beam-free pumping unit according to the present invention, showing a reducer, a gear mechanism and a counterweight assembly;
FIG. 3 is a side view of the drawing of FIG. 2 showing the retarder, motor, gear assembly and brake assembly.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" 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. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The embodiment of the utility model discloses ring gear formula does not have beam-pumping unit has solved the difficult installation of well exploitation beam-pumping unit that low infiltration well or supply liquid volume are not enough among the prior art, the problem of installation cycle length.
Referring to the attached figure 1, the utility model provides a ring gear formula does not have beam-pumping unit, include:
a base 100, a hinge seat 101 is connected on the base 100;
the bottom of the tower 200 is detachably connected with the top of the base 100, and the side surface of the bottom of the tower 200 is hinged with the hinge seat 101;
one end of the hydraulic oil cylinder 300 is connected with the hinge base 101, and the other end of the hydraulic oil cylinder 300 is connected with the side face of the tower frame 200; the extension or retraction of hydraulic rams 300 causes the tower 200 to be erected or laid down;
the speed reducer 400, wherein the speed reducer 400 can be detached from the top of the tower 200;
the input end of the speed reducer 400 is in power connection with the output end of the motor 500;
the gear mechanism 600 comprises a gear 601 and a gear ring 602 which are meshed with each other, the gear 601 is installed at the output end of the speed reducer 400, and the gear ring 602 is fixed at the top end of the tower frame 200 through a shaft seat; a rope wheel 603 is fixed on the gear ring 602, and a lifting rope 604 is wound on the rope wheel 603;
the rope hanger assembly 700 is connected with one end of a lifting rope 604;
the counterweight assembly 800 is connected to the other end of the lifting rope 604, and the counterweight assembly 800 is fixed on the side surface of the tower frame 200.
The utility model discloses a gear ring type walking beam-free pumping unit, because the utility model discloses a motor switching-over, drive reducing gear box ware, gear engagement ring gear do the rotation of just, anti-reversing, realize the suction of beam-pumping unit and arrange the function of adopting, this application adopts gear, ring gear and gear drive, compares with the general tower pumping unit, has reduced reducing gear box overall dimension, has saved external rotor motor and the assembly pulley of big moment of torsion, has advantages such as simple structure, light in weight, the energy consumption is low, the cost is low, wire rope long service life; because the base is provided with the hinge base, one end of the hydraulic oil cylinder is connected with the hinge base, and the other end of the hydraulic oil cylinder is connected with the side surface of the tower; the tower frame is erected or laid down by extending or contracting the hydraulic oil cylinder; the pumping unit is convenient to move and install.
Advantageously, tower 200 is a truss structure formed by welding steel sections and plates.
More advantageously, a cylinder ear seat 201 is provided on the side of the tower 200, and the other end of the hydraulic cylinder 300 is connected to the cylinder ear seat 201 through a pin.
In an embodiment of the present invention, referring to fig. 3, the rope pulley 603 includes a left rope pulley 6031 and a right rope pulley 6032, and both the left rope pulley 6031 and the right rope pulley 6032 are integrally fixed to the ring gear 602; all have the grooving on it, have rope fastening clip on the grooving, the lifting rope 604 rope end is fixed in the rope fastening clip, and twine on corresponding rope sheave 603. The rope sheave is fixed together with the gear ring, and the motor reversing operation drives the gear, and the gear drives the gear ring, and the gear ring drives the rope sheave, and the rope sheave drives the lifting rope reciprocating motion, has realized the suction row of beam-pumping unit and has adopted, has reduced the energy consumption.
In one embodiment provided by the present invention, referring to fig. 2, a counterweight assembly 800 includes a plurality of counterweights 801, a boom 802, a quick-mount boom clamp 803, and a support 804;
the multiple balancing weights 801 are detachably connected, and a fast-assembling suspender chuck 803 is fixed on the first balancing weight 801;
one end of the suspender 802 is connected with the fast-assembling suspender chuck 803, and the other end is connected with the lifting rope 604;
the support 804 is used to support the counterweight 801 and is connected to the tower 200.
In other embodiments provided by the present invention, the tower 200 is provided with two sets of rails 202 on the sides thereof, and the support 804 is a roller frame on which rollers 805 sliding along the rails 202 are provided. The guide rail is formed by welding steel pipes and section steel.
Specifically, a plurality of counterweights 801 are connected by rods 806 having threads on both ends. The quick-inserting and quick-disassembling effects are realized, the number of the balance weights is increased according to the load of the underground sucker rod, and the power balance is ensured.
In other embodiments provided herein, a brake assembly 900 for braking the counterweight assembly 800 is also included. In order to prevent the sucker rod from breaking off and causing the rapid sliding down of the balance weight to damage equipment.
Specifically, referring to fig. 3, the brake assembly 900 includes an electromagnetic brake disc 901, a sub-electromagnetic caliper disc 902, and a caliper disc seat 903; the electromagnetic brake disc 901 and the gear 601 are coaxially fixed, the side of the shaft close to the electromagnetic brake disc is connected with a bearing seat 904 of the reduction gearbox, the electromagnetic brake disc 901 and the auxiliary electromagnetic caliper disc 902 are electrically connected with an electric control system of the pumping unit to be matched for braking, the electromagnetic brake disc 901 is fixed on the caliper disc seat 903, and the caliper disc seat 903 is fixed on the tower frame 200. The auxiliary electromagnetic clamp disc can be 1 pair or more than 2 pairs, the auxiliary electromagnetic clamp disc is fixed on the clamp disc seat, and when the electric control system detects signals of the conditions of breaking and falling of the sucker rod and other sudden changes of load, the electromagnetic disc brake immediately loses power and brakes to enable the balance block to stop or slowly move downwards. The electromagnetic caliper disc adopts electric power failure for braking.
In other embodiments provided by the present invention, the present invention further comprises a protective cover, which covers the gear 601, the ring gear 602, and the rope wheel 603 in a closed space. The bottom of the protective cover can contain lubricating oil to lubricate components, so that the abrasion of the gear is reduced, and meanwhile, the protective cover can keep the lubricating oil clean.
The hinge base is fixedly connected to the pumping unit base, the tower is hinged to the hinge base through the supporting lug base on the side face, the hinge lug hole for mounting the hydraulic oil cylinder (or the spiral screw rod) is formed in the lower portion of the hinge base, and one end of the hydraulic oil cylinder (or the spiral screw rod) is connected with the hinge base. The other end of the oil cylinder is connected with an oil cylinder lug on the side surface of the tower frame, when the oil pumping unit needs to move to a new wellhead, the piston of the hydraulic oil cylinder retracts, and the tower frame of the oil pumping unit can be integrally placed on the base, so that the integral hoisting and transportation are facilitated. When a well needs to be repaired, a piston cylinder (or a screw lead screw) of the hydraulic oil cylinder slightly retracts, and the large gear ring and the rope pulley tilt backwards for a certain angle, so that the position of a well head can be kept away, and the well repairing operation is facilitated.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. A ring gear type walking-beam-free oil pumping machine is characterized by comprising:
the base (100), the hinge seat (101) is connected to the base (100);
the bottom of the tower (200) is detachably connected with the top of the base (100), and the bottom side of the tower (200) is hinged with the hinge base (101);
one end of the hydraulic oil cylinder (300) is connected with the hinge base (101), and the other end of the hydraulic oil cylinder (300) is connected with the side face of the tower (200); the tower (200) is erected or laid down by the extension or contraction of the hydraulic oil cylinder (300);
a speed reducer (400), the speed reducer (400) being detachable from the top of the tower (200);
the input end of the speed reducer (400) is in power connection with the output end of the motor (500);
the gear mechanism (600) comprises a gear (601) and a gear ring (602) which are meshed with each other, the gear (601) is installed at the output end of the speed reducer (400), and the gear ring (602) is fixed at the top end of the tower (200) through a shaft seat; a rope wheel (603) is fixed on the gear ring (602), and a lifting rope (604) is wound on the rope wheel (603);
a hanger assembly (700), one end of the lifting rope (604) being connected to the hanger assembly (700);
and the other end of the lifting rope (604) is connected with the counterweight assembly (800), and the counterweight assembly (800) is fixed on the side surface of the tower frame (200).
2. The ring gear type walking beam-free oil pumping machine according to claim 1, wherein the tower (200) is a truss structure formed by welding section steel and steel plates.
3. The ring gear type walking beam-free oil pumping machine according to claim 1, wherein a cylinder lug seat (201) is arranged on the side surface of the tower (200), and the other end of the hydraulic cylinder (300) is connected to the cylinder lug seat (201) through a pin shaft.
4. The ring gear type walking-beam-free oil pumping machine according to claim 1, wherein the rope pulley (603) comprises a left rope pulley (6031) and a right rope pulley (6032), and the left rope pulley (6031) and the right rope pulley (6032) are both fixed integrally with the ring gear (602); all have the grooving on it, have the rope fastening clip on the grooving, lifting rope (604) rope fastening in the rope fastening clip, and twine on corresponding rope sheave (603).
5. The ring gear type walking beam-free pumping unit of claim 1, wherein the counterweight assembly (800) comprises a plurality of counterweights (801), a boom (802), a quick-mount boom clamp (803), and a bracket (804);
the balance weights (801) are detachably connected, and the quick-assembly suspender chuck (803) is fixed on the first balance weight (801);
one end of the suspender (802) is connected with the fast-assembling suspender clamping head (803), and the other end is connected with the lifting rope (604);
the bracket (804) is used for supporting the balance weight (801) and is connected with the tower (200).
6. A ring gear type walking beam-free oil pumping machine according to claim 5, wherein the side of the tower (200) is provided with two sets of guide rails (202), and the bracket (804) is a roller frame on which rollers (805) sliding along the guide rails (202) are arranged.
7. A ring gear type walking beam-free pumping unit according to claim 5, wherein a plurality of said balance weights (801) are connected by a rod member having screw threads at both ends.
8. A ring gear walking beam-free pumping unit according to any one of claims 1-7, further comprising a brake assembly (900) for braking the counterweight assembly (800).
9. The ring gear type walking beam-free oil pumping unit according to claim 8, wherein the brake assembly (900) comprises an electromagnetic brake disc (901), a secondary electromagnetic caliper disc (902) and a caliper disc seat (903); the electromagnetic brake disc (901) and the gear (601) are coaxially fixed, the electromagnetic brake disc (901) and the auxiliary electromagnetic caliper disc (902) are electrically connected with an electric control system of the oil pumping unit to be matched for braking, the electromagnetic brake disc (901) is fixed on the caliper disc seat (903), and the caliper disc seat (903) is fixed on the tower frame (200).
10. A ring gear walking beam-free pumping unit according to any of claims 1-7 and 9, further comprising a shield covering the gear (601), the ring gear (602) and the rope sheave (603) in a closed space.
CN201921670871.9U 2019-10-08 2019-10-08 Gear ring type non-beam pumping unit Active CN212079268U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921670871.9U CN212079268U (en) 2019-10-08 2019-10-08 Gear ring type non-beam pumping unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921670871.9U CN212079268U (en) 2019-10-08 2019-10-08 Gear ring type non-beam pumping unit

Publications (1)

Publication Number Publication Date
CN212079268U true CN212079268U (en) 2020-12-04

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Country Status (1)

Country Link
CN (1) CN212079268U (en)

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Date Code Title Description
GR01 Patent grant
GR01 Patent grant
PE01 Entry into force of the registration of the contract for pledge of patent right
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of utility model: A ring gear type beam less pumping unit

Effective date of registration: 20211229

Granted publication date: 20201204

Pledgee: China Construction Bank Corporation North China Petroleum Branch

Pledgor: RONGSHENG MACHINERY MANUFACTURE Ltd. OF HUABEI OILFIELD

Registration number: Y2021980017013