CA2802876A1 - Tower-style double cylinder hydraulic oil pumping unit - Google Patents
Tower-style double cylinder hydraulic oil pumping unit Download PDFInfo
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- CA2802876A1 CA2802876A1 CA 2802876 CA2802876A CA2802876A1 CA 2802876 A1 CA2802876 A1 CA 2802876A1 CA 2802876 CA2802876 CA 2802876 CA 2802876 A CA2802876 A CA 2802876A CA 2802876 A1 CA2802876 A1 CA 2802876A1
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Abstract
' Tower-style Double Cylinder Hydraulic Oil Pumping Unit' ('the Unit') is an integrated electromechanical product developed for viscous oil well production needs, which adopts hydraulic technique to provide efficiency and reduce energy consumption. The Unit is composed of a Frame section ('tower') and a hydraulic pumping system. The Frame section includes: a Main frame; two oil Cylinders (A and B, see (17) and (18) in Graphic 2 for details), each of which includes a Tank ((2) in Graphic 1, same with below) and a Piston Rod (4); movable pulley group; Oxbow (Beam Hanger); counterweight fixed pulley groups; rim fixed pulley groups; top fixed pulley groups; lid; Sucker Rod pulling rope (steel wire); counterweight pulling ropes(steel wire); two triangular frames; counterweight steel wire ropes; fixed supporting frame; pulley fixer frame; counterweight; and mobile supporting-guiding frames and rails which move with the movable pulley groups. The Unit features two oil Cylinders in turn make telescopic movements, downward when stretching out (oil comes in) and upward when retracting (oil pumped out). A driving oil pump with electronic motor constantly pumps out high pressure hydraulic oil that drives the movements of the Cylinders. One Cylinder drives the Sucker Rod to make the upstroke and another drives the counterweight to make the down stroke. By adjusting the counterweight to make the loads of 2 Cylinders equal, the electronic motor operates with constant load and in single direction, therefore the Unit could realize high efficiency, save a significant part of power consumption, while also have a lighter, simpler structure than existing oil pumping units.
Description
Hydraulic Oil Pumping Unit - Patent Application - Description Tower-style Double Cylinder Hydraulic Oil Pumping Unit Patent Description Hydraulic Oil Pumping Unit - Patent Application - Description I. Field of invention:
"Tower-style Double Cylinder Hydraulic Oil Pumping Unit ("the Unit") is an integrated electromechanical product which adopts hydraulic technique to provide efficiency and reduce energy consumption in viscous oil well production.
II. Applying of the patent in other countries:
The patent for "Tower-style Double Cylinder Hydraulic Oil Pumping Unit" was first applied at the patent governing authority in China ¨ the "Intellectual Property Office of the People's Republic of China" on Aug 02, 2012. The Chinese application number is 201220379013Ø Main applicant: Guofeng Zhou, Xinsheng Qiao. Secondary Applicant: Shuang Zhou. By the date of this application, the Chinese patent application has been accepted, while the final approval is expected in 3-6 months. A copy of the patent application reception document from the "Intellectual Property Office of the People's Republic of China" is attached (with translation).
Ill. Background of the invention:
The basic framework of modern oil and gas drilling equipments is often referred to as "3 pieces" model, which includes an oil pump, a sucker rod and an electronic motor. The traditional oil pump design - walking-beam pumping unit, was developed using this model and have been in use across the world for several decades.
As the oil level of developed oil fields declines, and deeper, higher density oil fields are being exploited, oil pumping units need to reach deeper into the well, and with stronger lift forces. Therefore, the traditional walking-beam pumping unit has been facing declining efficiency and increasing energy waste, thus no longer fit for oil production in many cases.
More than that, most existing oil pumps have maximum stroke over 5 meters.
However under current "3 pieces" model, only part of the stroke ¨ about 3 meters ¨ is frequently used. Which means wear and tear only occurs in this area, causes more frequent inspection and replacement than should have been needed, while the rest of the capacity is wasted.
Last but not least, the useful life of a sucker rod is decided by number of strokes.
The less the number of strokes in a given time, the longer the sucker rod could function.
In conclusion, oil drilling operation nowadays calls for oil pumping unit that satisfies the following three criteria: long stroke, low stroke frequency, and Hydraulic Oil Pumping Unit- Patent Application - Description stronger lift. In recent years, many improved models have been developed to increase oil pumping units' stroke, examples include "Hauling-Pulling motor oil pumping unit", "3D multiple magnetic motor oil pumping unit", "Integrated digital control oil pumping unit", etc. The common weaknesses of these improved models are that their motors have to work reciprocally, thus needs complex control system, and usually involve frequency conversion techniques.
The same team (Shuang Zhou, Guofeng Zhou, Xinsheng Qiao) has developed "WCY JY12-8 tower type gravity balance hydraulic pumping unit", which is the first oil pumping unit design that doesn't needs reciprocate motor operation.
A
patent was granted by the Chinese "Intellectual Property Office of the People's Republic of China" in 2005, patent number 200510051096.5 (Shuang Zhou, Guofeng Zhou and Xinsheng Qiao). The disadvantage of this design is that it couldn't achieve gravity balance, therefore needs an additional hydraulic tank to accumulate energy. A copy of the patent search result on the "Intellectual Property Office of the People's Republic of China" website is attached.
IV. Description of the Patent:
The Unit builds on the previous Chinese Patent # 200510051096.5 "WCY JY12-8 tower type gravity balance hydraulic pumping unit", with significant improvement in gravity balance, further enhanced efficiency and stability, while simplified structure, thus is a significantly enhanced, completed model of oil hydraulic long stroke oil pumping unit.
The Unit is composed of a Frame section (Graphic 1) and a hydraulic pumping system (Graphic 2).
i. The Unit's Frame includes:
"Tower-style Double Cylinder Hydraulic Oil Pumping Unit ("the Unit") is an integrated electromechanical product which adopts hydraulic technique to provide efficiency and reduce energy consumption in viscous oil well production.
II. Applying of the patent in other countries:
The patent for "Tower-style Double Cylinder Hydraulic Oil Pumping Unit" was first applied at the patent governing authority in China ¨ the "Intellectual Property Office of the People's Republic of China" on Aug 02, 2012. The Chinese application number is 201220379013Ø Main applicant: Guofeng Zhou, Xinsheng Qiao. Secondary Applicant: Shuang Zhou. By the date of this application, the Chinese patent application has been accepted, while the final approval is expected in 3-6 months. A copy of the patent application reception document from the "Intellectual Property Office of the People's Republic of China" is attached (with translation).
Ill. Background of the invention:
The basic framework of modern oil and gas drilling equipments is often referred to as "3 pieces" model, which includes an oil pump, a sucker rod and an electronic motor. The traditional oil pump design - walking-beam pumping unit, was developed using this model and have been in use across the world for several decades.
As the oil level of developed oil fields declines, and deeper, higher density oil fields are being exploited, oil pumping units need to reach deeper into the well, and with stronger lift forces. Therefore, the traditional walking-beam pumping unit has been facing declining efficiency and increasing energy waste, thus no longer fit for oil production in many cases.
More than that, most existing oil pumps have maximum stroke over 5 meters.
However under current "3 pieces" model, only part of the stroke ¨ about 3 meters ¨ is frequently used. Which means wear and tear only occurs in this area, causes more frequent inspection and replacement than should have been needed, while the rest of the capacity is wasted.
Last but not least, the useful life of a sucker rod is decided by number of strokes.
The less the number of strokes in a given time, the longer the sucker rod could function.
In conclusion, oil drilling operation nowadays calls for oil pumping unit that satisfies the following three criteria: long stroke, low stroke frequency, and Hydraulic Oil Pumping Unit- Patent Application - Description stronger lift. In recent years, many improved models have been developed to increase oil pumping units' stroke, examples include "Hauling-Pulling motor oil pumping unit", "3D multiple magnetic motor oil pumping unit", "Integrated digital control oil pumping unit", etc. The common weaknesses of these improved models are that their motors have to work reciprocally, thus needs complex control system, and usually involve frequency conversion techniques.
The same team (Shuang Zhou, Guofeng Zhou, Xinsheng Qiao) has developed "WCY JY12-8 tower type gravity balance hydraulic pumping unit", which is the first oil pumping unit design that doesn't needs reciprocate motor operation.
A
patent was granted by the Chinese "Intellectual Property Office of the People's Republic of China" in 2005, patent number 200510051096.5 (Shuang Zhou, Guofeng Zhou and Xinsheng Qiao). The disadvantage of this design is that it couldn't achieve gravity balance, therefore needs an additional hydraulic tank to accumulate energy. A copy of the patent search result on the "Intellectual Property Office of the People's Republic of China" website is attached.
IV. Description of the Patent:
The Unit builds on the previous Chinese Patent # 200510051096.5 "WCY JY12-8 tower type gravity balance hydraulic pumping unit", with significant improvement in gravity balance, further enhanced efficiency and stability, while simplified structure, thus is a significantly enhanced, completed model of oil hydraulic long stroke oil pumping unit.
The Unit is composed of a Frame section (Graphic 1) and a hydraulic pumping system (Graphic 2).
i. The Unit's Frame includes:
Hydraulic Oil Pumping Unit - Patent Application - Description a a la u 12 13 ip.rxriciAmemai 7 _ 1 -. -411 _______________________ f / ________________________ r :4 3' I-i o f\AI
_MI µ
po 7 16 _l________,------'---------------------41.-- I I I
1) Frame; the entire frame includes a main frame (1) (as in Graphic 1, same below) and two triangular frames (12);
2) Two oil Cylinders (A and B, see (17) and (18) in Graphic 2) with tanks;
3) Movable pulley groups, including movable supporting frames and rail;
4) Piston rod;
_MI µ
po 7 16 _l________,------'---------------------41.-- I I I
1) Frame; the entire frame includes a main frame (1) (as in Graphic 1, same below) and two triangular frames (12);
2) Two oil Cylinders (A and B, see (17) and (18) in Graphic 2) with tanks;
3) Movable pulley groups, including movable supporting frames and rail;
4) Piston rod;
5) Oxbow (Beam Hanger);
6) Counterweight fixed pulley groups;
7) Rim fixed (pulling) pulley group;
8) Lid;
9) Sucker Rod pulling ropes (steel wire);
10) Top fixed pulley groups;
11) Counterweight pulling ropes (steel wire);
12) Triangular frames;
13) Counterweight steel wire ropes;
14) Fixed supporting frame;
Hydraulic Oil Pumping Unit - Patent Application - Description 15) Pulley fixer frame;
Hydraulic Oil Pumping Unit - Patent Application - Description 15) Pulley fixer frame;
16) Counterweight.
Two oil Cylinders mounted vertically on each side of the main frame (1). Each oil Cylinder includes a cylinder tank (2) with piston, and a piston rod (4); the pistons and cylinder tanks move in opposite directions, which enables the cylinder tanks to move downward when stretching out (oil comes in) and pushing the rod (4) upward, or upward when retracting (oil pumped out);
The movable pulley groups (3) are attached to the bottom of each oil cylinder tank (2) and moves with the tanks; the other end of both piston rods (4) are fixed to the bottom of the Lid (8), which is mounted at the upper center of the Main Frame (1);
On the other(upper) side of the Lid (8) were installed two Top fixed pulley groups(10); two triangular frames(12) were mounted at both sides of the top of the Main Frame(1), and are connected to the Main Frame(1) with pivot pins;
another three pulley groups(6) and (7) are installed on the upper surface of each triangular frame (12), including two Counterweight fixed pulley groups (6), and a Rim fixed (pulling) pulley group (7) in the middle;
Counterweight steel wire rope (13) connects the Counterweight (16) at its right end with the Oxbow (Beam Hanger) (5), by going up around Counterweight fixed pulley group (6) on the right triangle frame (12), turning left around the other Counterweight fixed pulley group (6) on the left triangle frame (12) and going down to the Oxbow (5);
The Sucker Rod pulling rope (9) connects the Oxbow (5) on its left end to the Pulley fixer frame (15) by going up around the Rim fixed (pulling) pulley group (7) on the left triangle frame (12), turning right around the left Top fixed pulley group (10), then turning down around the left Movable pulley group (3), coming back up to the Pulley fixer frame (15);
The Counterweight pulling rope (11) connects the Counterweight (16) at its right end to the Pulley fixer frame (15) by going up around the Rim fixed (pulling) pulley group (7) on the right triangle frame (12), turning left around the right Top fixed pulley group (10), going down around the right Movable pulley group (3), coming back up to the Pulley fixer frame (15).
ii. Working Principles of the Frame section:
Oil Cylinder A and oil Cylinder B are vertically mounted on both sides of the Main Frame. Pistons and cylinders move in opposite directions. Cylinders make telescopic movement, downward when stretching out (oil comes in) and upward when retracting (oil pumped out). Both cylinders alternately stretch and retract Hydraulic Oil Pumping Unit - Patent Application - Description and the pumping action is realized through traction of the piston rods and movements of the counterweight basket, pulled with steel wire ropes.
In the rising process of the sucker rod, the sucker rod is lifted through thrust of Oil Cylinder A on the right and potential energy of the counterweight basket;
in the declining process of the sucker rod, the counterweight basket is lifted through thrust of oil cylinder B on the left and potential energy of the sucker rod to save the counter potential energy required for the next lifting of the sucker rod. The design balances the sucker rod with the weight of the counterweight basket, so that the cylinders' working loads are constant, therefore the driving electronic motor could work with stable current through the pumping cycle and achieve efficiency.
iii. The Unit's hydraulic oil pumping system includes:
20 Lj , 17) Right oil Cylinder (A);
Two oil Cylinders mounted vertically on each side of the main frame (1). Each oil Cylinder includes a cylinder tank (2) with piston, and a piston rod (4); the pistons and cylinder tanks move in opposite directions, which enables the cylinder tanks to move downward when stretching out (oil comes in) and pushing the rod (4) upward, or upward when retracting (oil pumped out);
The movable pulley groups (3) are attached to the bottom of each oil cylinder tank (2) and moves with the tanks; the other end of both piston rods (4) are fixed to the bottom of the Lid (8), which is mounted at the upper center of the Main Frame (1);
On the other(upper) side of the Lid (8) were installed two Top fixed pulley groups(10); two triangular frames(12) were mounted at both sides of the top of the Main Frame(1), and are connected to the Main Frame(1) with pivot pins;
another three pulley groups(6) and (7) are installed on the upper surface of each triangular frame (12), including two Counterweight fixed pulley groups (6), and a Rim fixed (pulling) pulley group (7) in the middle;
Counterweight steel wire rope (13) connects the Counterweight (16) at its right end with the Oxbow (Beam Hanger) (5), by going up around Counterweight fixed pulley group (6) on the right triangle frame (12), turning left around the other Counterweight fixed pulley group (6) on the left triangle frame (12) and going down to the Oxbow (5);
The Sucker Rod pulling rope (9) connects the Oxbow (5) on its left end to the Pulley fixer frame (15) by going up around the Rim fixed (pulling) pulley group (7) on the left triangle frame (12), turning right around the left Top fixed pulley group (10), then turning down around the left Movable pulley group (3), coming back up to the Pulley fixer frame (15);
The Counterweight pulling rope (11) connects the Counterweight (16) at its right end to the Pulley fixer frame (15) by going up around the Rim fixed (pulling) pulley group (7) on the right triangle frame (12), turning left around the right Top fixed pulley group (10), going down around the right Movable pulley group (3), coming back up to the Pulley fixer frame (15).
ii. Working Principles of the Frame section:
Oil Cylinder A and oil Cylinder B are vertically mounted on both sides of the Main Frame. Pistons and cylinders move in opposite directions. Cylinders make telescopic movement, downward when stretching out (oil comes in) and upward when retracting (oil pumped out). Both cylinders alternately stretch and retract Hydraulic Oil Pumping Unit - Patent Application - Description and the pumping action is realized through traction of the piston rods and movements of the counterweight basket, pulled with steel wire ropes.
In the rising process of the sucker rod, the sucker rod is lifted through thrust of Oil Cylinder A on the right and potential energy of the counterweight basket;
in the declining process of the sucker rod, the counterweight basket is lifted through thrust of oil cylinder B on the left and potential energy of the sucker rod to save the counter potential energy required for the next lifting of the sucker rod. The design balances the sucker rod with the weight of the counterweight basket, so that the cylinders' working loads are constant, therefore the driving electronic motor could work with stable current through the pumping cycle and achieve efficiency.
iii. The Unit's hydraulic oil pumping system includes:
20 Lj , 17) Right oil Cylinder (A);
18) Left oil Cylinder (B);
19) 4 way switching valve;
20) Overflow/unloading controller;
21) Oil pump (connected to the electronic motor);
22) Switch sensor A;
23) Switch sensor B;
The hydraulic pumping system (Graphic 2) is installed partially outside, partially onto the main frame, and drives the movement of both cylinders by pumping in Hydraulic Oil Pumping Unit - Patent Application - Description high pressure liquid oil (hydraulic oil).
iv. Working Principles of the hydraulic pumping system:
The hydraulic pumping system is an open hydraulic circuiting system. An electronic motor drives the oil pump to spin, pumping out high pressure hydraulic oil. The high pressure hydraulic oil flows through the 4 way switching valve (19) into oil cylinder B (18) on the left side of the Main Frame(the process is the same if starts with oil Cylinder A on the right, (17)). The tank ((2) in Graphic 1) of oil Cylinder B moves downward to switch sensor B (23), which, upon sensing the tank in a certain range, sends signal to switch the 4 way switching valve. Upon switching the tank of the other oil cylinder, Cylinder A (17), starts to move downward to switch sensor A (22). Switch sensor A then sends signal to switch the 4 way switching valve again when the tank of Cylinder A reaches its range, thus completes a circle. The overflow/unloading controller (20) protects both cylinders during movements, while also release the load during launching phase and when the oil pump is spinning but the cylinders are stopped.
V. Installation of the machine Main Frame (1) is a welded structure using square cut hollow steel beams;
Triangle frames are welded using square cut hollow steel beams or channel beams; Lid (8), Oxbow (5), Fixed supporting frame (14) and Pulley fixer frame (15), together with the bases of various pulley groups are all made by steel slates, using welding techniques; Counterweight (16) is welded mainly using rectangle steel beams.
When installing, use anchor slate to fix Main Frame (1) to a concrete ground, use steel pivot pins to connect the two triangle frames (12) to both sides of the upper Main Frame, and then connect 3 pulley groups ¨ two counterweight pulley groups(6) and one Rim fixed pulley group (7) onto the upper surface of each triangular frame (12). The two Counterweight fixed pulley groups (6) are installed on both sides of the triangular frames, with the Rim fixed (pulling) pulley group (7) sits between (6). The Lid (8) is screwed to the center of the top of the Main Frame (1); two Top fixed pulley groups (10) are installed, symmetrically, on both sides of the upper surface of the Lid (8); the two oil Cylinders (17) and (18) are inside the Main Frame (1), with a steel rod fixed on top of each; the other end of the Piston rods (4) are fixed, symmetrically, to the bottom of the Lid (8); a movable pulley group (3) is installed to the bottom of each of the oil Cylinder tanks.
As shown in Graphic (1), use Counterweight steel wire ropes (13) and two steel pulling ropes (9) and (11) to connect Oxbow (5) all the way to Counterweight basket (16); the oil pump station is outside the Main Frame, using two oil pipes to connect to the two oil Cylinders (17) and (18). Hydraulic oil is then pumped into oil Cylinders A and B alternatively, driving them to move downward, which Hydraulic Oil Pumping Unit - Patent Application - Description in turn pulling Oxbow (5) (connected to the sucker rod) or the Counter weight basket (16) to move up, though the connection of Piston rods (4) and steel pulling ropes (9) and (11). Due to the design of two movable pulley groups, the travel distance of Oxbow (5) or the Counterweight basket (16) are twice of the travel distance of the oil Cylinder tanks. The setup of two switch sensors (22) and (23) decides the maximum travelling distance and timing to switch between oil Cylinders A and B.
VI. Working Cycle When the 4 way switching valve (19) is at neutral position, the oil intake of both oil Cylinders (17) and (18) are closed, the two Piston Rods (4) are stationary, and the sucker rod could stay at random position; when the 4 way switching valve turns left, hydraulic oil flows into the left oil Cylinder (18), pushing its tank (2) downward; at the same time the right oil Cylinder (17) expels oil out, retracting its tank upward, thus, through the steel pulling ropes, pulls the Oxbow (15) (connected to the sucker rod) up while the Counterweight basket (16) moves down; when the 4 way switching valve turns right, hydraulic oil flows into the right oil Cylinder (17), pushing its tank (2) downward; at the same time the left oil Cylinder (18) expels oil out, retracting its tank upward, thus, through the steel pulling ropes, pulls the Counterweight basket (16) up while the Oxbow (15) (connected to the sucker rod) moves down. When either tank of the oil Cylinders moves down close enough to the switch sensors (22) or (23), the switch sensor sends signal to the 4 way switching valve (19) to switch the direction.
VII. Feature The features of this new Tower-style Double Cylinder Hydraulic Oil Pumping Unit, which gives it significant advantages over existing oil pumping designs or technologies, include:
1. Larger hanging strength (over 280kN); long strike distance (over 8m); lower strike frequency(minimum frequency lower than 0.5/minute); strike distance/frequency could be adjusted to suit different needs;
2. Triangle frames could be switched to sideways and make room for drilling wells, therefore no need to uninstall/reinstall the machine when adjusting the location in a small range;
3. Could be easily equalized, current balance could be adjusted over 95%;
4. Electric motor runs consistently in the same direction; positive/negative cycle affords similar loads, therefore the electronic motor's load is stable;
5. The Electronic motor's required capacity is about 1/3 of that is required for current conventional pumping units;
6. Lighter, smaller, easier for transportation and installment;
7. Simply structure that is enduring, reliable and easy for maintenance.
Hydraulic Oil Pumping Unit - Patent Application - Specification Tower-style Double Cylinder Hydraulic Oil Pumping Unit Patent Application Specification Patent for "Tower-style Double Cylinder Hydraulic Oil Pumping Unit" (the Unit) has been files at the patent governing authority in China ¨ the "Intellectual Property Office of the People's Republic of China" on Aug 02, 2012. The Chinese application number is 201220379013Ø Main applicant: Guofeng Zhou, Xinsheng Qiao.
Secondary Applicant: Shuang Zhou. By the date of this application, the Chinese patent application has been accepted and waiting for approval.
The hydraulic pumping system (Graphic 2) is installed partially outside, partially onto the main frame, and drives the movement of both cylinders by pumping in Hydraulic Oil Pumping Unit - Patent Application - Description high pressure liquid oil (hydraulic oil).
iv. Working Principles of the hydraulic pumping system:
The hydraulic pumping system is an open hydraulic circuiting system. An electronic motor drives the oil pump to spin, pumping out high pressure hydraulic oil. The high pressure hydraulic oil flows through the 4 way switching valve (19) into oil cylinder B (18) on the left side of the Main Frame(the process is the same if starts with oil Cylinder A on the right, (17)). The tank ((2) in Graphic 1) of oil Cylinder B moves downward to switch sensor B (23), which, upon sensing the tank in a certain range, sends signal to switch the 4 way switching valve. Upon switching the tank of the other oil cylinder, Cylinder A (17), starts to move downward to switch sensor A (22). Switch sensor A then sends signal to switch the 4 way switching valve again when the tank of Cylinder A reaches its range, thus completes a circle. The overflow/unloading controller (20) protects both cylinders during movements, while also release the load during launching phase and when the oil pump is spinning but the cylinders are stopped.
V. Installation of the machine Main Frame (1) is a welded structure using square cut hollow steel beams;
Triangle frames are welded using square cut hollow steel beams or channel beams; Lid (8), Oxbow (5), Fixed supporting frame (14) and Pulley fixer frame (15), together with the bases of various pulley groups are all made by steel slates, using welding techniques; Counterweight (16) is welded mainly using rectangle steel beams.
When installing, use anchor slate to fix Main Frame (1) to a concrete ground, use steel pivot pins to connect the two triangle frames (12) to both sides of the upper Main Frame, and then connect 3 pulley groups ¨ two counterweight pulley groups(6) and one Rim fixed pulley group (7) onto the upper surface of each triangular frame (12). The two Counterweight fixed pulley groups (6) are installed on both sides of the triangular frames, with the Rim fixed (pulling) pulley group (7) sits between (6). The Lid (8) is screwed to the center of the top of the Main Frame (1); two Top fixed pulley groups (10) are installed, symmetrically, on both sides of the upper surface of the Lid (8); the two oil Cylinders (17) and (18) are inside the Main Frame (1), with a steel rod fixed on top of each; the other end of the Piston rods (4) are fixed, symmetrically, to the bottom of the Lid (8); a movable pulley group (3) is installed to the bottom of each of the oil Cylinder tanks.
As shown in Graphic (1), use Counterweight steel wire ropes (13) and two steel pulling ropes (9) and (11) to connect Oxbow (5) all the way to Counterweight basket (16); the oil pump station is outside the Main Frame, using two oil pipes to connect to the two oil Cylinders (17) and (18). Hydraulic oil is then pumped into oil Cylinders A and B alternatively, driving them to move downward, which Hydraulic Oil Pumping Unit - Patent Application - Description in turn pulling Oxbow (5) (connected to the sucker rod) or the Counter weight basket (16) to move up, though the connection of Piston rods (4) and steel pulling ropes (9) and (11). Due to the design of two movable pulley groups, the travel distance of Oxbow (5) or the Counterweight basket (16) are twice of the travel distance of the oil Cylinder tanks. The setup of two switch sensors (22) and (23) decides the maximum travelling distance and timing to switch between oil Cylinders A and B.
VI. Working Cycle When the 4 way switching valve (19) is at neutral position, the oil intake of both oil Cylinders (17) and (18) are closed, the two Piston Rods (4) are stationary, and the sucker rod could stay at random position; when the 4 way switching valve turns left, hydraulic oil flows into the left oil Cylinder (18), pushing its tank (2) downward; at the same time the right oil Cylinder (17) expels oil out, retracting its tank upward, thus, through the steel pulling ropes, pulls the Oxbow (15) (connected to the sucker rod) up while the Counterweight basket (16) moves down; when the 4 way switching valve turns right, hydraulic oil flows into the right oil Cylinder (17), pushing its tank (2) downward; at the same time the left oil Cylinder (18) expels oil out, retracting its tank upward, thus, through the steel pulling ropes, pulls the Counterweight basket (16) up while the Oxbow (15) (connected to the sucker rod) moves down. When either tank of the oil Cylinders moves down close enough to the switch sensors (22) or (23), the switch sensor sends signal to the 4 way switching valve (19) to switch the direction.
VII. Feature The features of this new Tower-style Double Cylinder Hydraulic Oil Pumping Unit, which gives it significant advantages over existing oil pumping designs or technologies, include:
1. Larger hanging strength (over 280kN); long strike distance (over 8m); lower strike frequency(minimum frequency lower than 0.5/minute); strike distance/frequency could be adjusted to suit different needs;
2. Triangle frames could be switched to sideways and make room for drilling wells, therefore no need to uninstall/reinstall the machine when adjusting the location in a small range;
3. Could be easily equalized, current balance could be adjusted over 95%;
4. Electric motor runs consistently in the same direction; positive/negative cycle affords similar loads, therefore the electronic motor's load is stable;
5. The Electronic motor's required capacity is about 1/3 of that is required for current conventional pumping units;
6. Lighter, smaller, easier for transportation and installment;
7. Simply structure that is enduring, reliable and easy for maintenance.
Hydraulic Oil Pumping Unit - Patent Application - Specification Tower-style Double Cylinder Hydraulic Oil Pumping Unit Patent Application Specification Patent for "Tower-style Double Cylinder Hydraulic Oil Pumping Unit" (the Unit) has been files at the patent governing authority in China ¨ the "Intellectual Property Office of the People's Republic of China" on Aug 02, 2012. The Chinese application number is 201220379013Ø Main applicant: Guofeng Zhou, Xinsheng Qiao.
Secondary Applicant: Shuang Zhou. By the date of this application, the Chinese patent application has been accepted and waiting for approval.
Claims (16)
1. 'Tower-style Double Cylinder Hydraulic Oil Pumping Unit' ('the Unit') is a new energy-saving double cylinder long stroke hydraulic oil pump designed for viscous oil well production needs. The unit is composed of a Frame section, as described in
Claim 2, and a hydraulic pumping system, as described in Claim 3.
2, The Unit's Frame section, as described in Claim 1, is characterized as follows:
The Frame section includes:
1) Frame; the entire frame includes a main frame (1) (as in Graphic 1, same below) and two triangular frames (12) on both sides;
2) Two oil Cylinders (A and B, see (17) and (18) in Graphic 2);
2, The Unit's Frame section, as described in Claim 1, is characterized as follows:
The Frame section includes:
1) Frame; the entire frame includes a main frame (1) (as in Graphic 1, same below) and two triangular frames (12) on both sides;
2) Two oil Cylinders (A and B, see (17) and (18) in Graphic 2);
3) Movable pulley groups, including movable supporting frames and rail;
4) Piston rod;
5) Oxbow (Beam Hanger);
6) Counterweight fixed pulley groups;
7) Rim fixed (pulling) pulley group;
8) Lid;
9) Sucker Rod pulling ropes (steel wire);
10) Top fixed pulley groups;
11) Counterweight pulling ropes (steel wire);
12) Triangular frames;
13) Counterweight steel wire ropes;
14) Fixed supporting frame;
15) Pulley fixer frame;
16) Counterweight.
The Frame section features:
1) 2 oil Cylinders mounted vertically on each side of the Main frame (1).
Each oil Cylinder includes a cylinder tank (2) with piston, and a piston rod (4); the pistons and cylinder tanks move in opposite directions, which enables the cylinders tanks to move downward when stretching out (oil comes in) and pushing the rod (4) upward, or upward when retracting (oil pumped out);
2) the movable pulley groups (3) are attached to the bottom of each oil tank (2) and moves with the tanks; the other end of both piston rods (4) are fixed to the bottom of the Lid (8), which is mounted at the upper center of the Main Frame (1);
3) on the other(upper) side of the Lid (8) were installed two Top fixed pulley groups(10); two triangular frames(12) were mounted at both sides of the top of the Main Frame(1), and are connected to the Main Frame(1) with pivot pins; another three pulley groups(6) and (7) are installed on the upper surface of each triangular frame (12), including two Counterweight fixed pulley groups (6), and a Rim fixed (pulling) pulley group (7) in the middle;
4) Counterweight steel wire rope (13) connects the Counterweight (16) at its right end with the Oxbow (Beam Hanger) (5), by going up around Counterweight fixed pulley group (6) on the right triangle frame (12), turning left around the other Counterweight fixed pulley groups (6) on the left triangle frame (12) and going down to the Oxbow (5);
5) the Sucker Rod pulling rope (9) connects the Oxbow (5) on its left end to the Pulley fixer frame (15) by going up around the Rim fixed (pulling) pulley group (7) on the left triangle frame (12), turning right around the left Top fixed pulley group (10), then turning down around the left Movable pulley group (3), coming back up to the Pulley fixer frame (15);
6) the Counterweight pulling rope (11) connects the Counterweight (16) at its right end to the Pulley fixer frame (15) by going up around the Rim fixed (pulling) pulley group (7) on the right triangle frame (12), turning left around the right Top fixed pulley group (10), going down around the right Movable pulley group (3), coming back up to the Pulley fixer frame (15).
3, The hydraulic pumping system, as described in Claim 1 and 2, is mounted on and beside the main frame. The hydraulic system drives the movement of both cylinders by pumping in high pressure liquid oil (hydraulic). The hydraulic pumping system characterized as:
1) The design of using electronic motor to drive oil pump to send high pressure liquid oil to flow through the pumping system. The high pressure hydraulic oil flows through the 4 way switching valve into oil cylinders (as described in Claim 2), one at a time, and drives their movements.
2) The design of using two switch sensors, which, upon sensing the tank of one oil cylinder has moved into a certain range, sends signal to switch the 4 way switching valve to send the high pressure oil to the other oil cylinder to realize circular movements.
3) Design of an overflow/unloading controller to protects both cylinders during movements, while also release the load during launching phase and when the oil pump is spinning but the cylinders are stopped.
4) The oil pumping system adopts open return circuit. Three oil pipes are connected to the machine, of which two are high pressure oil pipes that leads to the entrance of the two oil Cylinders (17) and (18), and the third one serves as discharging oil pipe that collects leaked hydraulic oil.
The Frame section features:
1) 2 oil Cylinders mounted vertically on each side of the Main frame (1).
Each oil Cylinder includes a cylinder tank (2) with piston, and a piston rod (4); the pistons and cylinder tanks move in opposite directions, which enables the cylinders tanks to move downward when stretching out (oil comes in) and pushing the rod (4) upward, or upward when retracting (oil pumped out);
2) the movable pulley groups (3) are attached to the bottom of each oil tank (2) and moves with the tanks; the other end of both piston rods (4) are fixed to the bottom of the Lid (8), which is mounted at the upper center of the Main Frame (1);
3) on the other(upper) side of the Lid (8) were installed two Top fixed pulley groups(10); two triangular frames(12) were mounted at both sides of the top of the Main Frame(1), and are connected to the Main Frame(1) with pivot pins; another three pulley groups(6) and (7) are installed on the upper surface of each triangular frame (12), including two Counterweight fixed pulley groups (6), and a Rim fixed (pulling) pulley group (7) in the middle;
4) Counterweight steel wire rope (13) connects the Counterweight (16) at its right end with the Oxbow (Beam Hanger) (5), by going up around Counterweight fixed pulley group (6) on the right triangle frame (12), turning left around the other Counterweight fixed pulley groups (6) on the left triangle frame (12) and going down to the Oxbow (5);
5) the Sucker Rod pulling rope (9) connects the Oxbow (5) on its left end to the Pulley fixer frame (15) by going up around the Rim fixed (pulling) pulley group (7) on the left triangle frame (12), turning right around the left Top fixed pulley group (10), then turning down around the left Movable pulley group (3), coming back up to the Pulley fixer frame (15);
6) the Counterweight pulling rope (11) connects the Counterweight (16) at its right end to the Pulley fixer frame (15) by going up around the Rim fixed (pulling) pulley group (7) on the right triangle frame (12), turning left around the right Top fixed pulley group (10), going down around the right Movable pulley group (3), coming back up to the Pulley fixer frame (15).
3, The hydraulic pumping system, as described in Claim 1 and 2, is mounted on and beside the main frame. The hydraulic system drives the movement of both cylinders by pumping in high pressure liquid oil (hydraulic). The hydraulic pumping system characterized as:
1) The design of using electronic motor to drive oil pump to send high pressure liquid oil to flow through the pumping system. The high pressure hydraulic oil flows through the 4 way switching valve into oil cylinders (as described in Claim 2), one at a time, and drives their movements.
2) The design of using two switch sensors, which, upon sensing the tank of one oil cylinder has moved into a certain range, sends signal to switch the 4 way switching valve to send the high pressure oil to the other oil cylinder to realize circular movements.
3) Design of an overflow/unloading controller to protects both cylinders during movements, while also release the load during launching phase and when the oil pump is spinning but the cylinders are stopped.
4) The oil pumping system adopts open return circuit. Three oil pipes are connected to the machine, of which two are high pressure oil pipes that leads to the entrance of the two oil Cylinders (17) and (18), and the third one serves as discharging oil pipe that collects leaked hydraulic oil.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220379013 CN202990977U (en) | 2012-08-02 | 2012-08-02 | Tower-type double cylinder push-pull hydraulic long stroke pumping unit |
| CN201220379013.0 | 2012-08-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2802876A1 true CA2802876A1 (en) | 2014-02-02 |
| CA2802876C CA2802876C (en) | 2015-05-12 |
Family
ID=48562168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2802876A Expired - Fee Related CA2802876C (en) | 2012-08-02 | 2012-12-10 | Tower-style double cylinder hydraulic oil pumping unit |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN202990977U (en) |
| CA (1) | CA2802876C (en) |
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2012
- 2012-08-02 CN CN 201220379013 patent/CN202990977U/en not_active Expired - Lifetime
- 2012-12-10 CA CA2802876A patent/CA2802876C/en not_active Expired - Fee Related
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| CN109488257A (en) * | 2018-12-26 | 2019-03-19 | 沈阳人和机电工程设备有限公司 | A kind of hydraulic pumping unit of pressure complementation |
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Also Published As
| Publication number | Publication date |
|---|---|
| CA2802876C (en) | 2015-05-12 |
| CN202990977U (en) | 2013-06-12 |
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