CN111706301A - A two-well and one-unit automatic reversing hydraulic pumping unit and its control system - Google Patents

Abstract

The invention belongs to the technical field of oil exploitation equipment, and discloses a two-well one-machine automatic reversing hydraulic pumping unit and a control system thereof, wherein the two-well one-machine automatic reversing hydraulic pumping unit is provided with a machine base, a frame main body and a tensioner are arranged on the machine base, a hydraulic oil cylinder and a guide wheel are arranged in the frame main body, a movable pulley block is arranged at the top of the hydraulic oil cylinder, and an automatic hydraulic control system is arranged between the movable pulley block and the machine base; the upper end of the frame main body is provided with an upper platform, the left side and the right side of the upper platform are respectively provided with a group of fixed pulley blocks, and the upper platform is also provided with a fixed pulley block telescopic hydraulic oil cylinder. The production operation is simultaneously carried out on two wells by one oil pumping unit, and the energy conservation, the stroke frequency speed and the stroke length are convenient to adjust by adopting a hydraulic scheme.

Description

A two-well and one-unit automatic reversing hydraulic pumping unit and its control system

technical field

The invention belongs to the technical field of petroleum exploitation equipment, in particular to a two-well and one-machine automatic reversing hydraulic pumping unit and a control system thereof.

Background technique

At present, in the oil extraction equipment, one oil pumping equipment is generally used to correspond to one oil well, which makes the steel consumption during the manufacture of the pumping unit large, the capital investment when the oil well is put into production and the installation of the pumping unit, and the corresponding electricity consumption in the later production operation. , maintenance and other high costs, environmental protection and energy saving are quite unfavorable.

Through the above analysis, the existing problems and defects in the prior art are:

The existing oil pumping equipment can only perform oil well production operations one-to-one, with large manufacturing consumables, high energy consumption, complicated maintenance and high cost, heavy parts and heavy strokes and difficulty in stroke adjustment, and a large area.

The difficulty of solving the above problems and defects is as follows:

(1) To realize two wells and one machine, it is necessary to overcome that when one well needs to stop operating, it cannot affect the normal operation of the other well.

(2) Use one piece of equipment to perform production operations on two wells at the same time.

The significance of solving the above problems and defects is:

The hydraulic system, movable pulley block, fixed pulley block, steel wire belt, and a spare counterweight box are used to cooperate with each other to overcome various technical difficulties in realizing two wells and one machine.

SUMMARY OF THE INVENTION

In order to solve the problems existing in the prior art, the present invention provides an automatic reversing hydraulic pumping unit with two wells and one unit.

The present invention is realized in this way, a two-well and one-unit automatic reversing hydraulic pumping unit is provided with a machine base, a frame body and a tensioner are installed on the machine base, and a hydraulic oil cylinder and a guide wheel are installed inside the frame body. , a movable pulley block is installed on the top of the hydraulic cylinder, and an automatic hydraulic control system is installed between the movable pulley block and the base;

An upper platform is installed on the upper end of the frame main body, a set of fixed pulley sets are installed on the left and right sides of the upper platform, and a telescopic hydraulic cylinder of the fixed pulley set is also installed on the upper platform.

Further, the fixed pulley group is slidably arranged on the upper platform through the telescopic hydraulic oil cylinder of the fixed pulley group, and a tensioner is installed in the middle of the platform.

Further, the two-well-one-unit automatic reversing hydraulic pumping unit is also provided with an accumulator, and the accumulator is connected to the hydraulic cylinder.

Further, the two-well and one-machine automatic reversing hydraulic pumping unit is also provided with a steel wire belt, which is fixed on the sucker rod holder of Well A to bypass the fixed pulley block on the upper platform and the guide pulley and movable pulley block on the base. , and finally fixed on the tensioner;

The steel wire belt is fixed on the sucker rod holder of Well B, bypassing the fixed pulley block and movable pulley block of the upper platform, and finally fixed on the tensioner.

Further, the hydraulic oil cylinder is connected to the hydraulic oil pump through the upward pipeline interface, and the hydraulic oil pump is connected to the motor; the piston rod of the hydraulic oil cylinder is extended and arranged, and the movable pulley block is connected to the sucker rod through a steel wire belt.

Further, an automatic hydraulic control system is installed at the bottom of the movable pulley block.

Further, if any one of the wells needs maintenance operations and other factors, in order not to affect the normal production operations of the other well, the invention is also equipped with a counterweight box. Install a counterweight box on the sucker rod holder at one end of the well that requires maintenance, etc. to keep the equipment running.

Another object of the present invention is to provide a control system for realizing the automatic reversing hydraulic pumping unit of two wells and one unit. The control system includes: an induction switch, an induction switch height adjustment and fixer, a flow control valve, an induction switch contact rod.

Combined with all the above-mentioned technical solutions, the advantages and positive effects possessed by the present invention are:

First, use one pumping unit to carry out production operations on two wells at the same time, and adopt the hydraulic scheme to achieve energy saving, and it is easy to adjust the stroke speed and stroke length.

Second, the pumping unit has a small footprint and low weight, and the equipment production consumables are 30% of the current oil pumping equipment on the market, which greatly reduces resources in equipment production. It is convenient for maintenance and operation, and the power consumption is 20% of the existing two oil pumping equipment. The length of the stroke only needs to adjust the height of the induction switch of the automatic hydraulic control system. The speed adjustment of the stroke only needs to adjust the flow valve of the variable pump, and the operation is convenient and simple. It solves the technical problems of one oil well and one oil pumping equipment in the current oil field, the large capital investment when the oil well is put into production and the installation of the pumping unit equipment, the corresponding electricity consumption in the later production operation, the complex maintenance operation and the high cost.

Third, the two-well and one-unit automatic reversing hydraulic pumping unit cleverly uses the lever principle, cancels the design of the counterweight box, and uses the wire belt of well A to bypass the movable pulley block from the upper end to be fixed on the tensioner, and the well B is fixed on the tensioner. The steel wire belt bypasses the movable pulley block from the lower end and is fixed on the tensioner. By realizing the up and down movement of the movable pulley block, the two wells move up and down alternately. use. The pumping unit is between the two wells AB, and the weights of the sucker rods in the two wells are equal to each other (the oil wells in a well site are almost the same in depth, so the weight of the sucker rods is almost the same), and the force exerted by the hydraulic cylinder is only It becomes an auxiliary force, and the pumping unit can operate normally with a small kinetic energy (like a seesaw). So as to achieve a very high energy saving effect.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the following briefly introduces the drawings that need to be used in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a top-view structural view of a two-well and one-unit automatic reversing hydraulic pumping unit according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of the front structure of the two-well and one-unit automatic reversing hydraulic pumping unit provided by the embodiment of the present invention.

In the figure: 1. Sucker rod holder; 2. Steel wire belt A; 3. Steel wire belt B; 4. Fixed pulley block A; 5. Fixed pulley block B; 6. Hydraulic cylinder; 7. Automatic hydraulic control system; 8. Guidance Wheel; 9. Frame main body; 10. Machine base; 11. Upper platform; 12. Telescopic hydraulic cylinder for fixed pulley block; 13. Moving pulley block; 14. Tensioner B; 15. Tensioner A; 16. Sucker rod A ; 17, sucker rod B; 18, upward hydraulic pipeline interface; 19, downward hydraulic pipeline interface; 20, belt centralizer.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

In view of the problems existing in the prior art, the present invention provides an automatic reversing hydraulic pumping unit with two wells and one unit. The present invention will be described in detail below with reference to the accompanying drawings.

A two-well and one-machine automatic reversing hydraulic pumping unit is realized by installing a two-well and one-machine automatic reversing hydraulic pumping unit between two oil wells. The two-well and one-unit automatic reversing hydraulic pumping unit is provided with a machine base, a frame body and a tensioner are installed on the machine base, a hydraulic oil cylinder and a guide wheel are installed inside the frame body, and a moving pulley block is installed on the top of the hydraulic oil cylinder. An automatic hydraulic control system is installed between the machine bases, an upper platform is installed on the upper end of the frame body, a set of fixed pulley blocks are installed on the left and right of the upper platform, and a telescopic hydraulic cylinder for the fixed pulley block is also installed on the upper platform. As shown in Figure 2), the fixed pulley block can slide back and forth on the upper platform through the telescopic hydraulic cylinder of the fixed pulley block in the platform, so as to adjust the distance between the outer ends of the two fixed pulley blocks to achieve the same vertical distance as the two wells, and at the same time It is convenient to retract the fixed pulley block during workover operations (as shown by the arrow in Figure 1). A tensioner is installed in the middle of the platform (used to adjust the tightness of the steel belt). Because the pumping unit utilizes the hydraulic system and cooperates with the movable pulley block and the belt, the oil pump does not intervene in the work in the shutdown state, and the braking system is automatically formed, which greatly improves the safety factor for maintenance and repair.

The invention also adds an accumulator to the hydraulic system. After the accumulator works for ten minutes, the accumulator can replace the motor to supply oil to the hydraulic cylinder for ten minutes. At this time, the motor stops working without power consumption. After a few minutes, the energy of the accumulator is released and the motor works again, and so on. Because the power of the hydraulic power unit motor is less than 20% of other pumping units.

The steel wire belt 2 is fixed on the sucker rod holder 1 of Well A, bypasses the fixed pulley block 4 on the upper platform and the guide pulley 8 and movable pulley block 13 on the base, and is finally fixed on the tensioner 15; the steel wire belt 3 is fixed on the well B The sucker rod holder 1 bypasses the fixed pulley block 5 and the movable pulley block 13 of the upper platform, and is finally fixed on the tensioner 14.

The motor provides kinetic energy to drive the hydraulic oil pump, and the hydraulic oil enters the hydraulic oil cylinder 6 through the upward pipeline interface 18, so that the piston rod of the hydraulic oil cylinder 6 extends so that the movable pulley block 13 rises, and the steel wire belt 2 is pulled up to lift the sucker rod 16. A The well does the upward stroke, the movable pulley block 13 lifts and relaxes the steel wire belt 3 at the same time, the B well relies on the weight of the sucker rod 17 to pull the steel wire belt 3 to lower itself, and the B well does the downward stroke (at the same time, the weight of the sucker rod in the B well is its own). For well A as a counterweight), when the upper sensor of the automatic hydraulic control system 7 is in contact when the piston rod of the hydraulic cylinder 6 rises to the top, the hydraulic oil enters the hydraulic cylinder 6 through the downward pipeline interface 19, and the piston rod of the hydraulic cylinder 6 It starts to shrink again, and the movable pulley block 13 is lowered to relax the wire belt 2. Well A relies on the weight of the sucker rod 16 to pull the wire belt 2 to descend by itself, and the well A makes a downstroke (while the weight of the sucker rod in Well A is the same as that in Well B) counterweight), when the movable pulley block 13 descends, the steel wire belt 3 is stretched to make the sucker rod 17 rise. At this time, the B well does an upward stroke, and when the movable pulley block 13 descends to the bottom, the lower sensor of the automatic hydraulic control system 7 When contacted, the hydraulic oil enters the hydraulic cylinder 6 through the upward pipeline 18 again, and the movable pulley block 13 starts to make an upward stroke of the upward well A, and the downward stroke of the B well, and so on. In the process of work, when well A is doing upstroke, well B is doing downstroke, and the weight of the sucker rod of well B is used as a counterweight; when well B is doing upstroke, well A is doing downstroke and the weight of the sucker rod of well A is again counterweight.

If any one of the wells needs maintenance operations and other factors, in order not to affect the normal production operation of the other well, the invention is also equipped with a counterweight box. Install a counterweight box on the sucker rod holder at one end of the well that requires maintenance, etc. to keep the equipment running.

The change of the length of the stroke can adjust the height of the induction switch of the automatic hydraulic control system. The adjustment of the stroke speed only needs to adjust the flow valve of the variable pump, and the operation is simple.

The working principle of the hydraulic system is: the motor drives the oil pump to inhale the hydraulic oil through the filter, and then transports the hydraulic oil through the check valve to the accumulator, adjusts the flow through the flow control valve to realize the stroke speed, and connects the pipeline to the automatic changer. To the hydraulic control device, and then enter the hydraulic cylinder 6 to raise or lower the cylinder. The automatic control system also starts and stops the motor and the accumulator alternately to make the two work alternately. A radiator is installed on the hydraulic circuit. In summer, the hydraulic oil can be dissipated through the radiator. In winter, the reversing valve can be closed and returned to the oil tank directly. The hydraulic system is also equipped with a pressure sensor. If the pressure of the hydraulic system increases when the oil well fails, the system will stop working. Protect all parts of the pumping unit.

In the description of the present invention, unless otherwise stated, "plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer" The orientation or positional relationship indicated by , "front end", "rear end", "head", "tail", etc. are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, not An indication or implication that the referred device or element must have a particular orientation, be constructed and operate in a particular orientation, is not to be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Any person skilled in the art is within the technical scope disclosed by the present invention, and all within the spirit and principle of the present invention Any modifications, equivalent replacements and improvements made within the scope of the present invention should be included within the protection scope of the present invention.

Claims (8)

1. The two-well one-machine automatic reversing hydraulic pumping unit is characterized in that the two-well one-machine automatic reversing hydraulic pumping unit is provided with a base, a frame main body and a tensioner are installed on the base, a hydraulic oil cylinder and a guide wheel are installed inside the frame main body, a movable pulley block is installed at the top of the hydraulic oil cylinder, and an automatic hydraulic control system is installed between the movable pulley block and the base;

the upper end of the frame main body is provided with an upper platform, the left side and the right side of the upper platform are respectively provided with a group of fixed pulley blocks, and the upper platform is also provided with a fixed pulley block telescopic hydraulic oil cylinder.

2. The two-well one-machine automatic reversing hydraulic pumping unit according to claim 1, wherein the fixed pulley block is slidably arranged on the upper platform through a fixed pulley block telescopic hydraulic oil cylinder, and the tensioner is arranged in the middle of the platform.

3. The two-well one-machine automatic reversing hydraulic pumping unit according to claim 1, further comprising an energy accumulator, wherein the energy accumulator is connected to the hydraulic oil cylinder.

4. The two-well one-machine automatic reversing hydraulic pumping unit according to claim 1, further comprising a steel wire belt fixed on a sucker rod holder of the well a, bypassing the upper platform fixed pulley block and the guide pulley and the movable pulley block on the base, and finally fixed on the tensioner;

the steel wire belt is fixed on a sucker rod fixer of the well B, bypasses the fixed pulley block and the movable pulley block of the upper platform and is finally fixed on the tensioner.

5. The two-well one-machine automatic reversing hydraulic pumping unit according to claim 1, wherein the hydraulic cylinder is connected with a hydraulic oil pump through an uplink pipeline interface, and the hydraulic oil pump is connected with a motor; the piston rod of the hydraulic oil cylinder extends out, and the movable pulley block is connected with the sucker rod through a steel wire belt.

6. The two-well one-machine automatic reversing hydraulic pumping unit according to claim 1, wherein an automatic hydraulic control system is installed at the bottom of the movable pulley block.

7. The two-well one-machine automatic reversing hydraulic pumping unit according to claim 1, characterized in that the two-well one-machine automatic reversing hydraulic pumping unit is further provided with a weight box.

8. A control system for implementing a two-well, one-machine, automatic reversing hydraulic pumping unit according to any one of claims 1 to 7, the control system comprising: the inductive switch, inductive switch altitude mixture control and fixer, flow control valve, response contact lever.

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