CA3220841A1 - Large stroke beam pumping unit - Google Patents
Large stroke beam pumping unit Download PDFInfo
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- CA3220841A1 CA3220841A1 CA3220841A CA3220841A CA3220841A1 CA 3220841 A1 CA3220841 A1 CA 3220841A1 CA 3220841 A CA3220841 A CA 3220841A CA 3220841 A CA3220841 A CA 3220841A CA 3220841 A1 CA3220841 A1 CA 3220841A1
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- pumping unit
- bracket
- large stroke
- walking beam
- base
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- 238000005086 pumping Methods 0.000 title claims abstract description 58
- 230000005540 biological transmission Effects 0.000 claims description 11
- 241000283074 Equus asinus Species 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000005094 computer simulation Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008094 contradictory effect Effects 0.000 description 2
- 230000037078 sports performance Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
- F04B47/02—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level
- F04B47/022—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level driving of the walking beam
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
- F04B47/02—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level
- F04B47/026—Pull rods, full rod component parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
- F04B47/02—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level
- F04B47/028—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level details of the walking beam
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Transmission Devices (AREA)
- Manipulator (AREA)
Abstract
A large-stroke walking beam-type oil pumping unit, comprising a base (1) and a driving mechanism (2) fixedly installed at one end of the base (1), wherein a walking beam (4) is arranged at the other end of the base (1) by means of a support mechanism (3) to form a walking beam type structure, a horsehead (5) is installed at a front end of the walking beam (4), a rear end of the walking beam (4) is connected to the driving mechanism (2) by means of a connecting rod (6) to form a crank connecting rod (6) structure, a middle base (7) is installed on the walking beam (4), the support mechanism (3) comprises a front support (301) and a rear support (302), wherein top ends of the front support and the rear support are connected to each other, and the other end of the front support (301) and the other end of the rear support (302) are installed on two sides of the base (1). By means of the oil pumping unit, the included angle between the oil pumping unit and a connecting line of a hinge member and a projection point is adjusted by adjusting the component dimensions and optimizing the support mechanism (3), such that stress concentration is reduced, thereby providing a service for use of the crank connecting rod (6) structure in the large-stroke walking beam-type oil pumping unit.
Description
LARGE STROKE BEAM PUMPING UNIT
CROSS REFERENCE TO THE RELATED APPLICATIONS
This application is the continuation application of International Application No.
PCT/CN2022/074870, filed on January 29, 2022, which is based upon and claims priority to Chinese Patent Application No. 202120653404.6, filed on March 31, 2021, the entire contents of which are incorporated herein by reference.
TECHNICAL FIELD
The present disclosure relates to the technical field of pumping units, and in particular to a large stroke beam pumping unit.
BACKGROUND
As one of the major energy sources in the world, the demand for petroleum products is increasing with the development of automobile and other manufacturing industries.
Therefore, the demand for oil extraction equipment is also increasing.
However, there are thousands of geological differences around the world, so different performance requirements are put forward for the oil extraction equipment.
At present, the oil extraction equipment in the world is mainly divided into a beam pumping unit and a tower pumping unit. The beam pumping unit is mainly used in the medium and small stroke (240in. or less), and the tower pumping unit is used in the long stroke (above 240in.). Therefore, there is no beam-type application in long-stroke pumping units, mainly tower-type.
However, in practical applications, it has been found that the reliability of beam pumping units is fifty percent higher than that of the tower pumping units, and the manufacturing cost of the beam pumping units is thirty to fifty percent lower than that of the tower pumping units. Therefore, there is a need for a beam pumping unit with practicality to achieve large stroke operation.
SUMMARY
An object of the present disclosure is directed to provide a large stroke beam pumping unit to solve the technical problems in the prior art.
In order to solve the above technical problems, the present disclosure specifically provides the following technical solutions.
A large stroke beam pumping unit comprises a base and a driving mechanism fixedly mounted at one end of the base, wherein a walking beam is provided at the other end of the base via a bracket mechanism, a donkey head is mounted at the front end of the walking beam, and the rear end of the walking beam is connected to the driving mechanism via a connecting rod; and a middle seat is mounted on the walking beam, the bracket mechanism includes a front bracket and a rear bracket connected at top ends, and the other ends of the front bracket and the rear bracket are mounted on both sides of the base; setting: A is a distance from the donkey head to the middle seat; C is a distance from the middle seat to the rear end of the walking beam; and the A
=
5791-7395 mm and the C = 3050-3611 mm.
Further, it is set that I is a distance between the rotation center of the driving mechanism and the projection of the middle seat on the base; P is a length of the connecting rod; H is a distance between the middle seat and the base; G is a distance from the rotation center of the driving mechanism to the base; R is a rotation radius of the driving mechanism; and the I = 3050-3569 mm, the P = 5759-7386 mm, the H =
8636-10838 mm, the G = 2819-3643 mm, and the R = 1524-2047 mm.
Further, the beam pumping unit adjusts the distance, the length and the rotation radius by the cut-and-trial, and a dynamic characteristic curve of the beam pumping unit is output by the dynamic simulation calculation; and the distance, the length and the rotation radius are adjusted again according to feedback of the dynamic characteristic curve until the dynamic characteristic curve is optimal.
Further, the walking beam is connected to a crank of the driving mechanism via the connecting rod to form a crank-connecting rod structure; the walking beam and the bracket mechanism form a large-stroke beam structure by adjusting the distance, the length and the rotation radius; the connecting rod includes a bottom rod hinged to the walking beam and a transmission rod hinged to the driving mechanism, respectively;
and the transmission rod is connected to the bottom rod via a telescopic rod built in the transmission rod, and the telescopic rod and the bottom rod are also hinged.
Further, an extension column is provided on both sides of a hinge; the front bracket and the rear bracket are respectively sleeved on the extension column on both sides of the hinge; and the front bracket and the rear bracket are movably mounted on the base along the long axis direction of the walking beam so as to adjust an included angle between the front bracket and the rear bracket.
Further, the vertical line of the middle seat is set as a center line, the included angle between the front bracket and the center line is 0-10 and the angle between the rear bracket and the center line is 0-16 .
CROSS REFERENCE TO THE RELATED APPLICATIONS
This application is the continuation application of International Application No.
PCT/CN2022/074870, filed on January 29, 2022, which is based upon and claims priority to Chinese Patent Application No. 202120653404.6, filed on March 31, 2021, the entire contents of which are incorporated herein by reference.
TECHNICAL FIELD
The present disclosure relates to the technical field of pumping units, and in particular to a large stroke beam pumping unit.
BACKGROUND
As one of the major energy sources in the world, the demand for petroleum products is increasing with the development of automobile and other manufacturing industries.
Therefore, the demand for oil extraction equipment is also increasing.
However, there are thousands of geological differences around the world, so different performance requirements are put forward for the oil extraction equipment.
At present, the oil extraction equipment in the world is mainly divided into a beam pumping unit and a tower pumping unit. The beam pumping unit is mainly used in the medium and small stroke (240in. or less), and the tower pumping unit is used in the long stroke (above 240in.). Therefore, there is no beam-type application in long-stroke pumping units, mainly tower-type.
However, in practical applications, it has been found that the reliability of beam pumping units is fifty percent higher than that of the tower pumping units, and the manufacturing cost of the beam pumping units is thirty to fifty percent lower than that of the tower pumping units. Therefore, there is a need for a beam pumping unit with practicality to achieve large stroke operation.
SUMMARY
An object of the present disclosure is directed to provide a large stroke beam pumping unit to solve the technical problems in the prior art.
In order to solve the above technical problems, the present disclosure specifically provides the following technical solutions.
A large stroke beam pumping unit comprises a base and a driving mechanism fixedly mounted at one end of the base, wherein a walking beam is provided at the other end of the base via a bracket mechanism, a donkey head is mounted at the front end of the walking beam, and the rear end of the walking beam is connected to the driving mechanism via a connecting rod; and a middle seat is mounted on the walking beam, the bracket mechanism includes a front bracket and a rear bracket connected at top ends, and the other ends of the front bracket and the rear bracket are mounted on both sides of the base; setting: A is a distance from the donkey head to the middle seat; C is a distance from the middle seat to the rear end of the walking beam; and the A
=
5791-7395 mm and the C = 3050-3611 mm.
Further, it is set that I is a distance between the rotation center of the driving mechanism and the projection of the middle seat on the base; P is a length of the connecting rod; H is a distance between the middle seat and the base; G is a distance from the rotation center of the driving mechanism to the base; R is a rotation radius of the driving mechanism; and the I = 3050-3569 mm, the P = 5759-7386 mm, the H =
8636-10838 mm, the G = 2819-3643 mm, and the R = 1524-2047 mm.
Further, the beam pumping unit adjusts the distance, the length and the rotation radius by the cut-and-trial, and a dynamic characteristic curve of the beam pumping unit is output by the dynamic simulation calculation; and the distance, the length and the rotation radius are adjusted again according to feedback of the dynamic characteristic curve until the dynamic characteristic curve is optimal.
Further, the walking beam is connected to a crank of the driving mechanism via the connecting rod to form a crank-connecting rod structure; the walking beam and the bracket mechanism form a large-stroke beam structure by adjusting the distance, the length and the rotation radius; the connecting rod includes a bottom rod hinged to the walking beam and a transmission rod hinged to the driving mechanism, respectively;
and the transmission rod is connected to the bottom rod via a telescopic rod built in the transmission rod, and the telescopic rod and the bottom rod are also hinged.
Further, an extension column is provided on both sides of a hinge; the front bracket and the rear bracket are respectively sleeved on the extension column on both sides of the hinge; and the front bracket and the rear bracket are movably mounted on the base along the long axis direction of the walking beam so as to adjust an included angle between the front bracket and the rear bracket.
Further, the vertical line of the middle seat is set as a center line, the included angle between the front bracket and the center line is 0-10 and the angle between the rear bracket and the center line is 0-16 .
2 Further, the middle seat and the bracket mechanism is connected at a connection by a stress arc patch.
Further, the stress arc patch extends arcuately along the long axis of the walking beam towards both ends.
Further, the stroke of the large stroke beam pumping unit is above 6.1 meters.
Further, the driving mechanism comprises an electric motor connected to a speed reducer via a belt, the speed reducer having a connecting rod connected via a crankshaft.
Further, the middle seat is slidably mounted on the walking beam; the top ends of the front bracket and the rear bracket are connected to each other via a hinge;
the other ends of the front bracket and the rear bracket are slidingly mounted on both sides of the base.
The present disclosure has the following advantageous effects compared to the prior art. The present disclosure achieves the goal of achieving both large strokes and reducing the weight and volume of the equipment by providing a specific A\C
size design. Preferably, the present disclosure also reduces stress concentrations by providing the stress arc patch and optimizing the out-of-sync sliding of the bracket mechanism to adjust its included angle to the line connecting the hinge and the projection point, which serves the application of the crank-connecting rod mechanism to the large stroke beam pumping unit.
BRIEF DESCRIPTION OF THE DRAWINGS
In order to more clearly illustrate the embodiments of the present disclosure or technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art It is obvious that the drawings in the following description are only exemplary and that a person skilled in the art, without involving any inventive effort, can derive other implementation figures from the provided drawings.
FIG. 1 is a schematic structural diagram of an embodiment according to the present disclosure;
FIG. 2 is a schematic structural diagram of a beam pumping unit according to the present disclosure;
FIG. 3 is a schematic structural diagram of a stress arc patch according to the present disclosure;
FIG. 4 is a schematic view of an included angle of a bracket mechanism and the
Further, the stress arc patch extends arcuately along the long axis of the walking beam towards both ends.
Further, the stroke of the large stroke beam pumping unit is above 6.1 meters.
Further, the driving mechanism comprises an electric motor connected to a speed reducer via a belt, the speed reducer having a connecting rod connected via a crankshaft.
Further, the middle seat is slidably mounted on the walking beam; the top ends of the front bracket and the rear bracket are connected to each other via a hinge;
the other ends of the front bracket and the rear bracket are slidingly mounted on both sides of the base.
The present disclosure has the following advantageous effects compared to the prior art. The present disclosure achieves the goal of achieving both large strokes and reducing the weight and volume of the equipment by providing a specific A\C
size design. Preferably, the present disclosure also reduces stress concentrations by providing the stress arc patch and optimizing the out-of-sync sliding of the bracket mechanism to adjust its included angle to the line connecting the hinge and the projection point, which serves the application of the crank-connecting rod mechanism to the large stroke beam pumping unit.
BRIEF DESCRIPTION OF THE DRAWINGS
In order to more clearly illustrate the embodiments of the present disclosure or technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art It is obvious that the drawings in the following description are only exemplary and that a person skilled in the art, without involving any inventive effort, can derive other implementation figures from the provided drawings.
FIG. 1 is a schematic structural diagram of an embodiment according to the present disclosure;
FIG. 2 is a schematic structural diagram of a beam pumping unit according to the present disclosure;
FIG. 3 is a schematic structural diagram of a stress arc patch according to the present disclosure;
FIG. 4 is a schematic view of an included angle of a bracket mechanism and the
3 center line according to the present disclosure.
Reference numerals in the drawings denote the followings, respectively.
1-base; 2-driving mechanism; 3-bracket mechanism; 4-walking beam; 5-donkey head;
6-connecting rod; 7-middle seat; 8-stress arc patch; 9-extension column; 301-front bracket; 302-rear bracket; 601-bottom rod; 602-transmission rod.
DETAILED DESCRIPTION OF THE EMBODIMENTS
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, but not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by a person skilled in the art without involving any inventive effort are within the scope of protection of the disclosure.
As shown in FIG. 1, this particular embodiment provides a large stroke beam pumping unit, including a base 1 and a driving mechanism 2 fixedly mounted at one end of the base 1, wherein a walking beam 4 is provided at the other end of the base 1 via a bracket mechanism 3 to form a beam structure, a donkey head 5 is mounted at the front end of the walking beam 4, and the rear end of the walking beam 4 is connected to the driving mechanism 2 via a connecting rod 6 to form a crank-connecting rod structure.
In the present embodiment, a beam structure is formed by providing a walking beam 4 at the other end of the base 1 via a bracket mechanism 3, and a crank-connecting rod structure is formed by connecting the rear end of the walking beam 4 with the driving mechanism 2 via the connecting rod 6. Namely, for the first time, the principle of the crank-connecting rod mechanism (a four-connecting rod) is applied to a walking beam pumping unit with a large stroke (240in, namely, above 6.1 m).
Wherein the driving mechanism includes an electric motor connected to a speed reducer via a belt, and the speed reducer is connected to a connecting rod 6 via a crankshaft.
In the prior art, the beam pumping unit is mainly used in the medium and small stroke (240in. or less), and the tower pumping unit is used in the long stroke (above 240in.).
Therefore, there is no beam-type application in long-stroke pumping units, mainly tower-type.
The main reasons for this are as follows: the stroke size of the beam pumping unit is
Reference numerals in the drawings denote the followings, respectively.
1-base; 2-driving mechanism; 3-bracket mechanism; 4-walking beam; 5-donkey head;
6-connecting rod; 7-middle seat; 8-stress arc patch; 9-extension column; 301-front bracket; 302-rear bracket; 601-bottom rod; 602-transmission rod.
DETAILED DESCRIPTION OF THE EMBODIMENTS
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, but not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by a person skilled in the art without involving any inventive effort are within the scope of protection of the disclosure.
As shown in FIG. 1, this particular embodiment provides a large stroke beam pumping unit, including a base 1 and a driving mechanism 2 fixedly mounted at one end of the base 1, wherein a walking beam 4 is provided at the other end of the base 1 via a bracket mechanism 3 to form a beam structure, a donkey head 5 is mounted at the front end of the walking beam 4, and the rear end of the walking beam 4 is connected to the driving mechanism 2 via a connecting rod 6 to form a crank-connecting rod structure.
In the present embodiment, a beam structure is formed by providing a walking beam 4 at the other end of the base 1 via a bracket mechanism 3, and a crank-connecting rod structure is formed by connecting the rear end of the walking beam 4 with the driving mechanism 2 via the connecting rod 6. Namely, for the first time, the principle of the crank-connecting rod mechanism (a four-connecting rod) is applied to a walking beam pumping unit with a large stroke (240in, namely, above 6.1 m).
Wherein the driving mechanism includes an electric motor connected to a speed reducer via a belt, and the speed reducer is connected to a connecting rod 6 via a crankshaft.
In the prior art, the beam pumping unit is mainly used in the medium and small stroke (240in. or less), and the tower pumping unit is used in the long stroke (above 240in.).
Therefore, there is no beam-type application in long-stroke pumping units, mainly tower-type.
The main reasons for this are as follows: the stroke size of the beam pumping unit is
4 mainly related to A value and H value. The larger the stroke, the larger the A
value and H value. Under the same wellhead load, according to the existing design teaching, the size of beam pumping unit constructed according to the traditional size model based on the mutual influence of various parameters of beam pumping unit will be very large when the stroke exceeds 240in., which not only brings difficulties in transportation, but mainly because of the increase of structural weight, the force requirements of various parts will be completely different from that of beam pumping unit with small strokes. This makes it difficult for the beam pumping unit to operate in an environment with a stroke above 240in.
Ideally, it can not only make the force transmission relatively high and stable, but also meet the sports performance (complete a large stroke), and also the structural strength can be satisfied and economical. Because of the characteristics of the crank-connecting rod mechanism, these requirements are contradictory, which limits the development of beam pumping unit in the long stroke direction.
As shown in FIG. 2, in the present embodiment, the walking beam 4 is connected to a crank of the driving mechanism 2 via the connecting rod 6 to form a crank-connecting rod structure; the walking beam 4 and the bracket mechanism 3 form a large-stroke beam structure by adjusting the distance, the length and the rotation radius;
and the crank-connecting rod structure, the stress arc patch 8 and the bracket mechanism 3 cooperate with the large-stroke beam structure. The crank connecting rod mechanism is applied in the large stroke beam pumping unit to improve reliability thereof and reduce manufacturing costs. Specifically, the beam pumping unit adjusts the distance, the length and the rotation radius by the cut-and-trial, and a dynamic characteristic curve of the beam pumping unit is output by the dynamic simulation calculation; and the distance, the length and the rotation radius are adjusted again according to feedback of the dynamic characteristic curve until the dynamic characteristic curve is optimal.
Specifically, in one preferred embodiment of the present embodiment, it is set that:
A is a distance from the donkey head 5 to the middle seat 7;
C is a distance from the middle seat 7 to the rear end of the walking beam 4;
I is a distance from the rotation center of the driving mechanism 2 to the projection of the middle seat 7 on the base 1;
P is a length of the connecting rod 6;
H is a distance between the middle seat 7 and the base 1;
G is a distance from the rotation center of the driving mechanism 2 to the base 1; and R is a rotation radius of the driving mechanism 2.
The stroke size of beam pumping unit is mainly related to A value and H value.
The larger the stroke is, the larger the A value and H value are. Thus, the force of all structural parts is less ideal in the case of the same wellhead load (the force is greater than the material strength, or the stress concentration occurs, which causes the structural parts to crack). If the force state is improved by changing other values, the motion characteristics will be poor (low force transfer ratio, and low efficiency).
Therefore, it can not only make the force transmission relatively high and stable, but also meet the sports performance (complete a large stroke), and also the structural strength can be satisfied and economical. Because of the characteristics of the crank-connecting rod mechanism, these requirements are contradictory, which thus limits the development of beam pumping unit in the long stroke direction.
In the present embodiment, the respective size values are optimized as follows.
A(mm) C(mm) 1(mm) P(mm) H(mm) G(mm) R(mm) In this embodiment, in order to enable the connecting rod 6 to adapt to changes in the length and angle of the bracket mechanism 3, the length of the connecting rod 6 can be adapted according to actual requirements. Specifically, the connecting rod includes a bottom rod 601 hinged to the walking beam 4 respectively and a transmission rod 602 hinged to the driving mechanism 2; and the transmission rod 602 is connected to the bottom rod 601 via a telescopic rod built in the transmission rod 602, and the telescopic rod and the bottom rod 601 are also hinged. The telescopic rod is a conventional telescopic structure, such as a telescopic structure of a double-set rod, but it needs to be stated that the telescopic structure needs to be used in combination with a locking structure, namely, the telescopic rod can be locked at any length when adjusting the length.
In the present embodiment, the crank connecting rod mechanism is applied to a large stroke beam pumping unit according to optimization of parameters. Further, as shown in FIGS. 1 and 3, a middle seat 7 is slidably mounted on the walking beam 4.
The middle seat 7 and the bracket mechanism 3 is connected at a connection by a stress arc patch 8, and the bracket mechanism 3 includes a front bracket 301 and a rear bracket 302 connected via a hinge at the top ends, and the other ends of the front bracket 301 and the rear bracket 302 are both slidably mounted on both sides of the base 1.
A stress arc patch 8 is used to connect the middle seat 7 and the bracket mechanism 3, so as to reduce the stress on the middle seat 7 and improve the fatigue strength. In particular, the stress arc device 8 includes a bearing seat 801 connected to the bracket mechanism 3 and a patch body 802 connected to the middle seat 7.
The cross section of the bearing seat 801 is trapezoidal, and the bearing seat 801 and the patch body 802 are connected via an arc-shaped extension body 803. The bearing seat 801, the arc-shaped extension body 803 and the patch body 802 are of an integrated structure. The main reason is that a large stroke beam pumping unit would cause a large value of A, and therefore the walking beam would have a poor stress state. A stress concentration would occur, and the service life of the structure would be greatly reduced. In this particular embodiment, a stress arc structure is used to release the stress concentration. According to the experimental results, the stress is reduced from 310 M pa to 98 Mpa.
In a second aspect, an extension column 9 is provided on both sides of a hinge; the front bracket 301 and the rear bracket 302 are respectively sleeved on the extension column 9 on both sides of the hinge; and the front bracket 301 and the rear bracket 302 are movably mounted on the base 1 along the long axis direction of the walking beam 4 so as to adjust an included angle between the front bracket 301 and the rear bracket 302. It is set that the vertical line of the middle seat 7 is a center line. The angles of the front and rear legs of the support are optimized, improving the stress state of the support and the reliability, and continuously adjusting the angles of the front and rear legs by the cut-and-trial for dynamic and finite element analysis until the strength requirements are met. As shown in FIG. 4, the angle between the front bracket 301 and the center line is 100, and the angle between the rear bracket 302 and the center is 16 .
In view of the above, it is essential in this embodiment to provide a range of the walking beam sizes to achieve long strokes and reduce the overall mass of the equipment. In addition to this, the stress arc patch 8 is provided and the out-of-sync sliding of the front bracket 301 and the rear bracket 302 is optimized to adjust the included angle thereof with the center line of the line connecting the hinge and the projection point to reduce stress concentration, thereby serving the application of the crank-connecting rod mechanism to a large stroke beam pumping unit.
The above examples are merely illustrative examples of the present application and are not intended to limit the present application, the scope of which is defined by the claims. Various modifications and equivalent arrangements within the spirit and scope of the present application may be devised by those skilled in the art, which should be considered as falling within the scope of the present application.
value and H value. Under the same wellhead load, according to the existing design teaching, the size of beam pumping unit constructed according to the traditional size model based on the mutual influence of various parameters of beam pumping unit will be very large when the stroke exceeds 240in., which not only brings difficulties in transportation, but mainly because of the increase of structural weight, the force requirements of various parts will be completely different from that of beam pumping unit with small strokes. This makes it difficult for the beam pumping unit to operate in an environment with a stroke above 240in.
Ideally, it can not only make the force transmission relatively high and stable, but also meet the sports performance (complete a large stroke), and also the structural strength can be satisfied and economical. Because of the characteristics of the crank-connecting rod mechanism, these requirements are contradictory, which limits the development of beam pumping unit in the long stroke direction.
As shown in FIG. 2, in the present embodiment, the walking beam 4 is connected to a crank of the driving mechanism 2 via the connecting rod 6 to form a crank-connecting rod structure; the walking beam 4 and the bracket mechanism 3 form a large-stroke beam structure by adjusting the distance, the length and the rotation radius;
and the crank-connecting rod structure, the stress arc patch 8 and the bracket mechanism 3 cooperate with the large-stroke beam structure. The crank connecting rod mechanism is applied in the large stroke beam pumping unit to improve reliability thereof and reduce manufacturing costs. Specifically, the beam pumping unit adjusts the distance, the length and the rotation radius by the cut-and-trial, and a dynamic characteristic curve of the beam pumping unit is output by the dynamic simulation calculation; and the distance, the length and the rotation radius are adjusted again according to feedback of the dynamic characteristic curve until the dynamic characteristic curve is optimal.
Specifically, in one preferred embodiment of the present embodiment, it is set that:
A is a distance from the donkey head 5 to the middle seat 7;
C is a distance from the middle seat 7 to the rear end of the walking beam 4;
I is a distance from the rotation center of the driving mechanism 2 to the projection of the middle seat 7 on the base 1;
P is a length of the connecting rod 6;
H is a distance between the middle seat 7 and the base 1;
G is a distance from the rotation center of the driving mechanism 2 to the base 1; and R is a rotation radius of the driving mechanism 2.
The stroke size of beam pumping unit is mainly related to A value and H value.
The larger the stroke is, the larger the A value and H value are. Thus, the force of all structural parts is less ideal in the case of the same wellhead load (the force is greater than the material strength, or the stress concentration occurs, which causes the structural parts to crack). If the force state is improved by changing other values, the motion characteristics will be poor (low force transfer ratio, and low efficiency).
Therefore, it can not only make the force transmission relatively high and stable, but also meet the sports performance (complete a large stroke), and also the structural strength can be satisfied and economical. Because of the characteristics of the crank-connecting rod mechanism, these requirements are contradictory, which thus limits the development of beam pumping unit in the long stroke direction.
In the present embodiment, the respective size values are optimized as follows.
A(mm) C(mm) 1(mm) P(mm) H(mm) G(mm) R(mm) In this embodiment, in order to enable the connecting rod 6 to adapt to changes in the length and angle of the bracket mechanism 3, the length of the connecting rod 6 can be adapted according to actual requirements. Specifically, the connecting rod includes a bottom rod 601 hinged to the walking beam 4 respectively and a transmission rod 602 hinged to the driving mechanism 2; and the transmission rod 602 is connected to the bottom rod 601 via a telescopic rod built in the transmission rod 602, and the telescopic rod and the bottom rod 601 are also hinged. The telescopic rod is a conventional telescopic structure, such as a telescopic structure of a double-set rod, but it needs to be stated that the telescopic structure needs to be used in combination with a locking structure, namely, the telescopic rod can be locked at any length when adjusting the length.
In the present embodiment, the crank connecting rod mechanism is applied to a large stroke beam pumping unit according to optimization of parameters. Further, as shown in FIGS. 1 and 3, a middle seat 7 is slidably mounted on the walking beam 4.
The middle seat 7 and the bracket mechanism 3 is connected at a connection by a stress arc patch 8, and the bracket mechanism 3 includes a front bracket 301 and a rear bracket 302 connected via a hinge at the top ends, and the other ends of the front bracket 301 and the rear bracket 302 are both slidably mounted on both sides of the base 1.
A stress arc patch 8 is used to connect the middle seat 7 and the bracket mechanism 3, so as to reduce the stress on the middle seat 7 and improve the fatigue strength. In particular, the stress arc device 8 includes a bearing seat 801 connected to the bracket mechanism 3 and a patch body 802 connected to the middle seat 7.
The cross section of the bearing seat 801 is trapezoidal, and the bearing seat 801 and the patch body 802 are connected via an arc-shaped extension body 803. The bearing seat 801, the arc-shaped extension body 803 and the patch body 802 are of an integrated structure. The main reason is that a large stroke beam pumping unit would cause a large value of A, and therefore the walking beam would have a poor stress state. A stress concentration would occur, and the service life of the structure would be greatly reduced. In this particular embodiment, a stress arc structure is used to release the stress concentration. According to the experimental results, the stress is reduced from 310 M pa to 98 Mpa.
In a second aspect, an extension column 9 is provided on both sides of a hinge; the front bracket 301 and the rear bracket 302 are respectively sleeved on the extension column 9 on both sides of the hinge; and the front bracket 301 and the rear bracket 302 are movably mounted on the base 1 along the long axis direction of the walking beam 4 so as to adjust an included angle between the front bracket 301 and the rear bracket 302. It is set that the vertical line of the middle seat 7 is a center line. The angles of the front and rear legs of the support are optimized, improving the stress state of the support and the reliability, and continuously adjusting the angles of the front and rear legs by the cut-and-trial for dynamic and finite element analysis until the strength requirements are met. As shown in FIG. 4, the angle between the front bracket 301 and the center line is 100, and the angle between the rear bracket 302 and the center is 16 .
In view of the above, it is essential in this embodiment to provide a range of the walking beam sizes to achieve long strokes and reduce the overall mass of the equipment. In addition to this, the stress arc patch 8 is provided and the out-of-sync sliding of the front bracket 301 and the rear bracket 302 is optimized to adjust the included angle thereof with the center line of the line connecting the hinge and the projection point to reduce stress concentration, thereby serving the application of the crank-connecting rod mechanism to a large stroke beam pumping unit.
The above examples are merely illustrative examples of the present application and are not intended to limit the present application, the scope of which is defined by the claims. Various modifications and equivalent arrangements within the spirit and scope of the present application may be devised by those skilled in the art, which should be considered as falling within the scope of the present application.
Claims (11)
1. A large stroke beam pumping unit comprising a base and a driving mechanism fixedly mounted at a first end of the base, wherein a walking beam is provided at a second end of the base via a bracket mechanism, a donkey head is mounted at a front end of the walking beam, and a rear end of the walking beam is connected to the driving mechanism via a connecting rod; a middle seat is mounted on the walking beam; and the bracket mechanism comprises a front bracket and a rear bracket, wherein a top end of the front bracket and a top end of the rear bracket are connected, and a bottom end of the front bracket and a bottom end of the rear bracket are mounted on both sides of the base;
setting: A is a distance from the donkey head to the middle seat; C is a distance from the middle seat to the rear end of the walking beam; and the A = 5791-7395 mm and the C = 3050-3611 mm.
setting: A is a distance from the donkey head to the middle seat; C is a distance from the middle seat to the rear end of the walking beam; and the A = 5791-7395 mm and the C = 3050-3611 mm.
2. The large stroke beam pumping unit according to claim 1, wherein l is a distance between a rotation center of the driving mechanism and a projection of the middle seat on the base; P is a length of the connecting rod; H is a distance between the middle seat and the base; G is a distance from the rotation center of the driving mechanism to the base; R is a rotation radius of the driving mechanism;
and the l = 3050-3569 mm, the P = 5759-7386 mm, the H = 8636-10838 mm, the G
= 2819-3643 mm, and the R = 1524-2047 mm.
and the l = 3050-3569 mm, the P = 5759-7386 mm, the H = 8636-10838 mm, the G
= 2819-3643 mm, and the R = 1524-2047 mm.
3. The large stroke beam pumping unit according to claim 2, wherein the large stroke beam pumping unit adjusts the distance, the length and the rotation radius by a cut-and-trial, and a dynamic characteristic curve of the large stroke beam pumping unit is output by a dynamic simulation calculation; and the distance, the length and the rotation radius are adjusted again according to feedback of the dynamic characteristic curve until the dynamic characteristic curve is optimal.
4. The large stroke beam pumping unit according to claim 3, wherein the walking beam is connected to a crank of the driving mechanism via the connecting rod to form a crank-connecting rod structure; the walking beam and the bracket mechanism form a large-stroke beam structure by adjusting the distance, the length and the rotation radius; the connecting rod comprises a bottom rod hinged to the walking beam and a transmission rod hinged to the driving mechanism, respectively;
and the transmission rod is connected to the bottom rod via a telescopic rod built in the transmission rod, and the telescopic rod and the bottom rod are hinged.
and the transmission rod is connected to the bottom rod via a telescopic rod built in the transmission rod, and the telescopic rod and the bottom rod are hinged.
5. The large stroke beam pumping unit according to claim 1, wherein an extension column is provided on both sides of a hinge; the front bracket and the rear bracket are respectively sleeved on the extension column on both sides of the hinge;
and the front bracket and the rear bracket are movably mounted on the base along a long axis direction of the walking beam to adjust a first included angle between the front bracket and the rear bracket.
and the front bracket and the rear bracket are movably mounted on the base along a long axis direction of the walking beam to adjust a first included angle between the front bracket and the rear bracket.
6. The large stroke beam pumping unit according to claim 5, wherein a vertical line of the middle seat is set as a center line, a second included angle between the front bracket and the center line is 0-10 , and a third angle between the rear bracket and the center line is 0-16 .
7. The large stroke beam pumping unit according to any one of claims 1-6, wherein the middle seat and the bracket mechanism is connected at a connection by a stress arc patch.
8. The large stroke beam pumping unit according to claim 7, wherein the stress arc patch extends arcuately along a long axis of the walking beam towards both ends.
9. The large stroke beam pumping unit according to claim 1, wherein a stroke of the large stroke beam pumping unit is above 6.1 meters.
10. The large stroke beam pumping unit according to claim 4, wherein the driving mechanism comprises an electric motor, wherein the electric motor is connected to a speed reducer via a belt, and the speed reducer is connected to a connecting rod via a crankshaft.
11. The large stroke beam pumping unit according to any one of claims 1-10, wherein the middle seat is slidably mounted on the walking beam; the top end of the front bracket and the top end of the rear bracket are connected to each other via a hinge; and the bottom end of the front bracket and the bottom end of the rear bracket are slidingly mounted on both sides of the base.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120653404.6 | 2021-03-31 | ||
| CN202120653404.6U CN214035623U (en) | 2021-03-31 | 2021-03-31 | Large-stroke beam-pumping unit |
| PCT/CN2022/074870 WO2022206167A1 (en) | 2021-03-31 | 2022-01-29 | Large-stroke walking beam-type oil pumping unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA3220841A1 true CA3220841A1 (en) | 2022-10-06 |
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ID=77348408
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3220841A Pending CA3220841A1 (en) | 2021-03-31 | 2022-01-29 | Large stroke beam pumping unit |
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| Country | Link |
|---|---|
| US (1) | US20230043079A1 (en) |
| CN (1) | CN214035623U (en) |
| CA (1) | CA3220841A1 (en) |
| WO (1) | WO2022206167A1 (en) |
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| CN214035623U (en) * | 2021-03-31 | 2021-08-24 | 德瑞石油装备（青岛）有限公司 | Large-stroke beam-pumping unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2526345C (en) * | 2005-10-13 | 2011-03-01 | Pumpwell Solutions Ltd. | Method and system for optimizing downhole fluid production |
| CA2744324C (en) * | 2011-06-27 | 2018-10-16 | Pumpwell Solutions Ltd. | System and method for determination of polished rod position for reciprocating rod pumps |
| BR102014001322A2 (en) * | 2014-01-20 | 2014-06-24 | Omar Pereira Gurgel | DYNAMIC OIL EXTRACTION PUMP UNIT |
| CN110608014A (en) * | 2019-09-17 | 2019-12-24 | 德瑞石油装备（青岛）有限公司 | Beam-pumping unit of super large stroke and load |
| CN110566163A (en) * | 2019-09-17 | 2019-12-13 | 德瑞石油装备（青岛）有限公司 | beam-pumping unit of super large stroke and load |
| CN113027388B (en) * | 2021-03-31 | 2022-03-04 | 德瑞石油装备（青岛）有限公司 | Large-stroke beam-pumping unit |
| CN214035623U (en) * | 2021-03-31 | 2021-08-24 | 德瑞石油装备（青岛）有限公司 | Large-stroke beam-pumping unit |
-
2021
- 2021-03-31 CN CN202120653404.6U patent/CN214035623U/en active Active
-
2022
- 2022-01-29 CA CA3220841A patent/CA3220841A1/en active Pending
- 2022-01-29 WO PCT/CN2022/074870 patent/WO2022206167A1/en active Application Filing
- 2022-10-03 US US17/958,454 patent/US20230043079A1/en active Pending
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| Publication number | Publication date |
|---|---|
| CN214035623U (en) | 2021-08-24 |
| WO2022206167A1 (en) | 2022-10-06 |
| US20230043079A1 (en) | 2023-02-09 |
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