CA2322407C - Curved-beam pumping unit - Google Patents
Curved-beam pumping unit Download PDFInfo
- Publication number
- CA2322407C CA2322407C CA 2322407 CA2322407A CA2322407C CA 2322407 C CA2322407 C CA 2322407C CA 2322407 CA2322407 CA 2322407 CA 2322407 A CA2322407 A CA 2322407A CA 2322407 C CA2322407 C CA 2322407C
- Authority
- CA
- Canada
- Prior art keywords
- curved
- pumping unit
- walking beam
- crank
- speed reducer
- 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.)
- Expired - Lifetime
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- Reciprocating Pumps (AREA)
- Vehicle Body Suspensions (AREA)
- Motorcycle And Bicycle Frame (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
A curved-beam pumping unit is provided, in which a support and a speed reducer are both affixed to a base, a beam seat is mounted on an upper end of the support, and a coupler assembly is connected at one end to a crossbeam fixed on a walking beam and connected at the other end to a crank which connecting the speed reducer with a crank balance, characterized in that the rear end of the walking beam is formed as curved shape and having a balance weight mounted on its tail part.
Description
Curved-beam Pumping Unit The present invention relates to a pumping apparatus for oil production.
This apparatus belongs to a kind of curved-beam pumping unit.
At present, for non-flowing oil wells, it is generally exploited with mechanical pumping units, such as the most widely used curved-beam pumping units. In a curved-beam pumping unit, a walking beam is pivotally supported on a support via a beam seat, a horsehead is installed on a front end of the walking beam and connected with a pumping rod though a cable suspension, a rear end of walking beam is pivoted on a crank and coupler mechanism by a crossbeam, and a motor drives the crank and coupler mechanism via a speed reducer. The walking beam is driven by the crank and coupler mechanisms through the crossbeam, to swings reciprocally in a vertical plane. Therefore, the horsehead and the cable suspension can drive the pumping rod moving up and down reciprocally, to pumping oil. The walking beam type pumping unit has the advantages of working reliably, being sturdy and durable, easy to maintain, and working in open fields perennially without inspected especially. However, in the past more than 100 years, walking beam type pumping units have been affected by the four-bar linkage, so that the load acting on the crank which is resulted from the load at suspension point of pumping unit does not vary sinuously.
Furthermore, being affected by additional loads during operating, including the inertial load at suspension point, the loading torque curve would deform.
Therefore, the crank balancing torque, which varies sinuously, could not balance with the load torque. In addition, the net output torque of the crank in one turn would arises a relatively high peak value and a relatively low valley (negative) value, so that the energy consumption of the pumping unit is increased and the efficiency of the pumping unit is decreased. Meanwhile, the lifetime of the speed reducer would be sacrificed from the negative torque.
With the development of oil wells, the liquid level of oil well lowers gradually, the number of flowing wells decreases progressively, and more and more pumping units are put into use. As a result, the problems about long stroking and deep pumping, the increasing of efficiency of pumping unit, and the lowering of energy consumption, etc., appear to be more significant.
It is an object of the present invention to provide a curved-beam pumping unit which can avoid the disadvantages in the prior art, and to provide an energy-economized pumping unit with long stroke, low energy consumption and high efficiency, and being sturdy and durable and easy to operate.
The above object has been obtained by a curved-beam pumping unit, in which a support and a speed reducer are both affixed to a base, a beam seat is mounted on an upper end of the support, and a coupler assembly is connected at one end to a crossbeam fixed on a walking beam and connected at the other end to a crank which connecting the speed reducer with a crank balance, characterized in that the rear end of the walking beam is formed as curved shape and having a balance weight mounted on its tail part.
The number and position of the balance weight mounted on the rear end of the walking beam are adjustable.
The beam seat may be installed diametrically at the fulcrums on the upper, lower or middle part of the walking beam, and the walking beam may be formed as staggered or zigzag shape.
The present invention has the advantages as follows:
This apparatus belongs to a kind of curved-beam pumping unit.
At present, for non-flowing oil wells, it is generally exploited with mechanical pumping units, such as the most widely used curved-beam pumping units. In a curved-beam pumping unit, a walking beam is pivotally supported on a support via a beam seat, a horsehead is installed on a front end of the walking beam and connected with a pumping rod though a cable suspension, a rear end of walking beam is pivoted on a crank and coupler mechanism by a crossbeam, and a motor drives the crank and coupler mechanism via a speed reducer. The walking beam is driven by the crank and coupler mechanisms through the crossbeam, to swings reciprocally in a vertical plane. Therefore, the horsehead and the cable suspension can drive the pumping rod moving up and down reciprocally, to pumping oil. The walking beam type pumping unit has the advantages of working reliably, being sturdy and durable, easy to maintain, and working in open fields perennially without inspected especially. However, in the past more than 100 years, walking beam type pumping units have been affected by the four-bar linkage, so that the load acting on the crank which is resulted from the load at suspension point of pumping unit does not vary sinuously.
Furthermore, being affected by additional loads during operating, including the inertial load at suspension point, the loading torque curve would deform.
Therefore, the crank balancing torque, which varies sinuously, could not balance with the load torque. In addition, the net output torque of the crank in one turn would arises a relatively high peak value and a relatively low valley (negative) value, so that the energy consumption of the pumping unit is increased and the efficiency of the pumping unit is decreased. Meanwhile, the lifetime of the speed reducer would be sacrificed from the negative torque.
With the development of oil wells, the liquid level of oil well lowers gradually, the number of flowing wells decreases progressively, and more and more pumping units are put into use. As a result, the problems about long stroking and deep pumping, the increasing of efficiency of pumping unit, and the lowering of energy consumption, etc., appear to be more significant.
It is an object of the present invention to provide a curved-beam pumping unit which can avoid the disadvantages in the prior art, and to provide an energy-economized pumping unit with long stroke, low energy consumption and high efficiency, and being sturdy and durable and easy to operate.
The above object has been obtained by a curved-beam pumping unit, in which a support and a speed reducer are both affixed to a base, a beam seat is mounted on an upper end of the support, and a coupler assembly is connected at one end to a crossbeam fixed on a walking beam and connected at the other end to a crank which connecting the speed reducer with a crank balance, characterized in that the rear end of the walking beam is formed as curved shape and having a balance weight mounted on its tail part.
The number and position of the balance weight mounted on the rear end of the walking beam are adjustable.
The beam seat may be installed diametrically at the fulcrums on the upper, lower or middle part of the walking beam, and the walking beam may be formed as staggered or zigzag shape.
The present invention has the advantages as follows:
1. The balancing effect of the pumping unit is improved, and the peak and valley values of net output torque of the crank are decreased.
2. The stress of four-bar linkage is reduced, the swing angle increased, a long stroke can be obtained, the reliability of the components is raised, and the features of normal beam pumping unit, such as structural simplicity, reliability and durability, can be possessed.
2. The stress of four-bar linkage is reduced, the swing angle increased, a long stroke can be obtained, the reliability of the components is raised, and the features of normal beam pumping unit, such as structural simplicity, reliability and durability, can be possessed.
3. The energy consumption of the pumping unit is decreased, so as to increasing the overall efficiency.
The present invention is to be explained with exemplary embodiments and in connection with the drawings, in which:
Fig. 1 is a schematic drawing of the structure of a curved-beam pumping unit.
Fig. 2 is a schematic drawing of a walking beam and a beam seat of the curved-beam pumping unit.
Fig. 3 is a schematic drawing of a walking beam and a beam seat of the curved-beam pumping unit.
As shown in Fig. 1, a support 2 and a speed reducer 12 are both affixed to a base 1, and a beam seat 3 is mounted on an upper end of the support 2. A
walking beam 6, which is formed as curved shape, is diametrically connected to the beam seat 3 at an optimum fulcrum and attached to the beam seat 3. A
horsehead 5 and a suspension 4 are mounted on the front end of the walking beam 6, a beam balance 8 is mounted on the rear end of the walking beam 6, and a crossbeam 7 is mounted on a curved portion of the walking beam 6 by bearings.
A coupler assembly 9 is connected at one end to the crossbeam 7, and attached at the other end to a crank 11 which connecting a crank balance 10 and the speed reducer 12. When the crank and coupler mechanism is brought into operating by the speed reducer 12, the walking beam 6 is driven by the crank 11 and the coupler assembly 9 through the crossbeam 7, so as to move reciprocally in a vertical plane. The suspension 4 is acted by the horsehead S, so as to move up and down, to pumping oil.
The walking beam 6 may also be formed as staggered or zigzag shape, as shown in Figs. 2 and 3. The beam seat 3 may also mounted on the lower or middle part of the walking beam 6 at the optimum fulcrum.
The present invention is to be explained with exemplary embodiments and in connection with the drawings, in which:
Fig. 1 is a schematic drawing of the structure of a curved-beam pumping unit.
Fig. 2 is a schematic drawing of a walking beam and a beam seat of the curved-beam pumping unit.
Fig. 3 is a schematic drawing of a walking beam and a beam seat of the curved-beam pumping unit.
As shown in Fig. 1, a support 2 and a speed reducer 12 are both affixed to a base 1, and a beam seat 3 is mounted on an upper end of the support 2. A
walking beam 6, which is formed as curved shape, is diametrically connected to the beam seat 3 at an optimum fulcrum and attached to the beam seat 3. A
horsehead 5 and a suspension 4 are mounted on the front end of the walking beam 6, a beam balance 8 is mounted on the rear end of the walking beam 6, and a crossbeam 7 is mounted on a curved portion of the walking beam 6 by bearings.
A coupler assembly 9 is connected at one end to the crossbeam 7, and attached at the other end to a crank 11 which connecting a crank balance 10 and the speed reducer 12. When the crank and coupler mechanism is brought into operating by the speed reducer 12, the walking beam 6 is driven by the crank 11 and the coupler assembly 9 through the crossbeam 7, so as to move reciprocally in a vertical plane. The suspension 4 is acted by the horsehead S, so as to move up and down, to pumping oil.
The walking beam 6 may also be formed as staggered or zigzag shape, as shown in Figs. 2 and 3. The beam seat 3 may also mounted on the lower or middle part of the walking beam 6 at the optimum fulcrum.
Claims (5)
1. A curved-beam pumping unit, in which a support and a speed reducer are both affixed to a base, a beam seat is mounted on an upper end of the support, and a coupler assembly is connected at one end to a crossbeam fixed on a walking beam and connected at the other end to a crank which connecting the speed reducer with a crank balance, characterized in that the rear end of the walking beam is formed as curved shape and having a balance weight mounted on its tail part.
2. The curved-beam pumping unit as claimed in claim 1, wherein the number and position of the balance weight mounted on the rear end of the walking beam are adjustable.
3. The curved-beam pumping unit as claimed in claim 1, wherein the beam seat is installed diametrically at the fulcrums on an upper, lower or middle part of the walking beam.
4. The curved-beam pumping unit as claimed in claim 1, wherein the walking beam is formed as staggered or zigzag shape.
5
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99248371 CN2391028Y (en) | 1999-10-13 | 1999-10-13 | Meander ridge pumping well |
| CN99248371.9 | 1999-10-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2322407A1 CA2322407A1 (en) | 2001-04-13 |
| CA2322407C true CA2322407C (en) | 2005-02-01 |
Family
ID=5322615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2322407 Expired - Lifetime CA2322407C (en) | 1999-10-13 | 2000-10-05 | Curved-beam pumping unit |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN2391028Y (en) |
| CA (1) | CA2322407C (en) |
| ID (1) | ID27632A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8240221B2 (en) * | 2010-08-09 | 2012-08-14 | Lufkin Industries, Inc. | Beam pumping unit for inclined wellhead |
| CN103115108B (en) * | 2012-09-20 | 2015-02-04 | 钟新 | Electric balancer of beam-pumping unit |
| CN104912521A (en) * | 2015-04-15 | 2015-09-16 | 吕传庆 | Novel pumping unit convenient to integrally seal |
| CN106948796B (en) * | 2017-03-20 | 2023-04-25 | 中国石油天然气股份有限公司 | Intermittent pumping control device and method for pumping unit without stopping |
| US10760386B2 (en) | 2018-04-27 | 2020-09-01 | Weatherford Technology Holdings, Llc | Slant well pumping unit |
| CN109339744B (en) * | 2018-10-26 | 2023-08-15 | 中国石油化工股份有限公司 | Automatic balance adjusting device and method for non-driving beam pumping unit |
| CN112412403B (en) * | 2020-11-20 | 2022-06-03 | 沈岩 | Automatic control method for intermittent pumping period amplitude swing operation of pumping unit by using disc motor |
| CN118273688B (en) * | 2024-05-30 | 2024-08-06 | 华运隆腾机械制造有限公司 | High-stability double-horsehead oil pumping machine |
-
1999
- 1999-10-13 CN CN 99248371 patent/CN2391028Y/en not_active Expired - Lifetime
-
2000
- 2000-10-05 CA CA 2322407 patent/CA2322407C/en not_active Expired - Lifetime
- 2000-10-12 ID IDP20000884D patent/ID27632A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CA2322407A1 (en) | 2001-04-13 |
| CN2391028Y (en) | 2000-08-09 |
| ID27632A (en) | 2001-04-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20201005 |