CN87103481A

CN87103481A - Long stroke beam-pumping unit with chain without sliding beam

Info

Publication number: CN87103481A
Application number: CN87103481.6A
Authority: CN
Inventors: 兆文清; 李志良; 严增寿
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-05-15
Filing date: 1987-05-15
Publication date: 1988-11-23
Also published as: CN1007997B

Abstract

The utility model relates to a beamless chain extended-range long-stroke pumping unit, which belongs to oil exploitation production equipment. The whole machine of the present invention is small in size and low in height, with a total weight of 18 tons and a total height of 9 meters; the range-extending mechanism adopts chain transmission, which has high working reliability and durability; The block pulls the reversing mechanism, the reversing acceleration is small, and the operation is stable and reliable. Its suspension point load is 12 tons, the stroke length is 6 meters, and the stroke rate is 2.5-6.5 meters per minute. It is not only suitable for oil production in general oil wells, but also suitable for high viscosity, rich gas, sandy, heavy wax, and water flooding. And deep well mining or strong mining. Its structure is simple, the technology is advanced, and it is easy to repair and build.

Description

Non-beam chain extended-range long-stroke oil pumping machine

The invention relates to a long-stroke oil pumping machine without a walking beam and with a chain stroke-increasing mechanism, belonging to oil exploitation production equipment.

At present, the beam-free type long-stroke pumping units used in oil field exploitation in China have various defects respectively including a CN86102979 track chain type pumping unit and a CN85103185 steel rope distance-increasing type pumping unit with long stroke. If the track chain type pumping unit has a plurality of wearing parts and poor working reliability and durability, the reversing special chain links, the cylinder balance seal and the like are all wearing parts, the track chain generates large acceleration at the upper dead point and the lower dead point, and the suspension point is under stable reversing. The steel cable distance-increasing type long-stroke oil pumping machine has the advantages that the distance-increasing steel cable is subjected to fatigue failure due to small bending radius, the service life is short, eccentric wear and bending clamping are generated on the counterweight guide rail under the action of the traction torque of the common quick rope of the distance-increasing slide rail set, the appearance size is high, the weight is large, the diameter of a head sheave is up to 4.5 meters, the weight is high, and the overall stability is poor. The pumping unit is affected by the shell or the height and has the problems of inconvenient maintenance and repair, and troublesome stroke adjustment and frequency of stroke.

The invention aims to provide a non-beam chain extended-range long-stroke oil pumping machine, overcomes the defects of the existing non-beam long-stroke oil pumping machine, and provides a novel oil pumping machine which is simple in structure, advanced in technology, easy to manufacture and repair and used for oil exploitation. The whole machine has small overall size, low height, total weight of 18 tons and total height of 9 meters. The distance-increasing mechanism adopts chain transmission, has high working reliability and durability, the suspension point reversing is realized by pulling the reversing mechanism by the crank-connecting rod mechanism and pulling the slide block, the reversing acceleration is small, the operation is stable and reliable, and a suspension rope chain balance system is adopted, and the two ends of the suspension rope chain are directly hung with the balance weight and the polished rod, wherein the balance weight is in a support-free sinking type, and the balance weight sinks underground, so that the work is safe. The whole machine has low requirements on the field working environment, the pumping unit has no easily-damaged parts and no protective cover, the stroke and the stroke frequency are adjusted on the ground, and the operation and the maintenance are convenient.

The invention has small moving mass, thus having small inertia load and low energy loss. Because the impulse number is low by 2.5 times/min to 6.5 times/min, the load of the suspension point is 12 tons, and the movement speed of the suspension point is low by 15 meters/min to 39 meters/min, the suction filling of the pump is realized, and the pump efficiency is improved. Because the stroke is long and is 6 meters, the relative stroke loss is small, and the pumping liquid amount is large. It is suitable for oil exploitation of common oil well, high viscosity, rich gas, sand, heavy wax, water flooding, deep well oil exploitation or powerful exploitation. The pump has wide use performance, can realize long stroke, large displacement or deep pumping under the same suspension point load, can realize deep pumping or small pump diameter and small load under the same displacement, and can realize the working characteristics of large pump diameter, long stroke and large displacement under the same pumping depth.

The main structure of the invention is as follows: the device comprises a base, a frame, a motor, a V-belt pulley, a reduction gearbox and a slide block traction mechanism, wherein the slide block traction mechanism comprises: the device comprises a crank connecting rod mechanism, a slide block, a slide rail, a reversing chain, an upper reversing chain wheel and a lower reversing chain wheel, and a range extending mechanism, wherein the range extending mechanism comprises: the device comprises a range-extending chain wheel, a range-extending chain, a chain wheel type head sheave and a suspension rope chain type balance system, wherein the suspension rope chain type balance system comprises: a suspension rope chain, a balance weight, a guide wheel, a suspension point and the like.

The attached drawing is a structural schematic diagram of a non-beam chain extended-range long-stroke oil pumping machine.

The following detailed description is made with reference to the accompanying drawings: the base 24 is connected with the frame 23, and other structures of the oil pumping unit are respectively arranged on the base 24 and the frame 23. The motor (1) is connected with a reduction gearbox (3) through a V-belt (2) and a V-belt pulley (25), a crank (4) is arranged on an output shaft of the reduction gearbox, one end of the crank (4) is connected with a connecting rod (5) to form a crank-link mechanism, a slide block (7) in a slide rail (22) is connected with a reversing chain (8) and one end of the connecting rod (5), the reversing chain (8) is supported on reversing sprockets (6) and (9), and the rotary motion of the motor (1) is converted into vertical reciprocating linear motion of the slide block (7) and the reversing chain (8) in the slide rail (22) through the crank-link mechanism. The reverse chain wheel (9) and the range-extending chain wheel (10) are mounted on a chain wheel shaft (20), the range-extending chain wheel (14) and the chain wheel type head sheave (15) are mounted on a chain wheel shaft (21), and the range-extending chain wheel (10) and the range-extending chain wheel (14) are connected through a range-extending chain (12). The pitch diameters of the reversing sprocket wheel 9, the range-increasing sprocket wheel 10, the range-increasing sprocket wheel 14 and the sprocket type head sheave 15 are increased by a fixed ratio of 2 to 4 times to form a chain range-increasing mechanism, which amplifies the stroke of the slide block. The chain wheel of the range-extending mechanism rotates around the chain wheel shaft in a reciprocating manner along the clockwise direction during work. The rope-suspending chain 13 is directly hung on the gear teeth on the upper edge of the chain wheel type head sheave 15 and the upper edge of the guide pulley 16 through the chain wheel type head sheave 15 and the guide pulley 16, one end of the rope-suspending chain is fixedly connected with a suspension point 11 and is connected with a polished rod, and the other end is directly hung with a sinking type balance weight 17.

Example (b): when the invention is put into oil production, the whole machine is placed on a foundation, the stroke and the stroke frequency are adjusted, the crank link mechanism pulls the slide block ' 7 ' and the reversing chain ' 8 ' in the slide rail ' 22 ' to do vertical reciprocating motion, the stroke of the slide block ' 7 ' is amplified by the range extending mechanism, and the chain wheel type head sheave ' 15 ' rotates in a reciprocating way along the clockwise direction, so that the suspension rope chain ' 13 ' reciprocates on the chain wheel type head sheave ' 15 ' and the guide through sheave ' 16 ' to transmit power, meanwhile, the balance weights 17 ' at the two ends of the suspension rope chain ' 13 ' and the polish rods fixedly connected on the suspension points ' 11 ' vertically reciprocate at the two sides of the rack, and finally, the long-stroke oil pumping is realized through the reciprocating motion of the suspension rope chain ' 13 '. The rotation speed of the motor (1) or the triangular belt pulley (25) can be changed by adjusting the stroke and the radius of the crank (4).

Claims

1. A non-beam long-stroke pumping unit composed of a base, a frame, a motor and a reducer is characterized in that a chain range-extending mechanism composed of a reversing chain wheel 9, a range-extending chain wheel 10, a chain wheel 14, a chain wheel type head sheave 15 and a range-extending chain 12 is adopted; adopts a slide block pulling and reversing mechanism composed of a crank "" 4 "", a connecting rod "" 5 "", a slide rail "" 22 "", a slide block "" 7 "", a reversing chain "" 8 "", a reversing sprocket "" 6 "", and a "" 9 ""; a rope-suspension chain balance system composed of a rope-suspension chain (13), a balance weight (17), a suspension point (11) and a guide wheel (16) is used.

2. The pumping unit of claim 1, wherein the reversing sprocket "9" and the range-extending sprocket "10" are mounted on a sprocket shaft "20", the range-extending sprocket "14" and the sprocket head sheave "15" are mounted on a sprocket shaft "21", and the range-extending chain "12" is connected to the range-extending sprockets "10" and "14".

3. The pumping unit of claim 1, wherein the crank-link mechanism comprising the crank "4" and the link "5" connects the slide "7" and the direction-changing chain "8" in the slide rail "22", and the direction-changing chain "8" is supported by the direction-changing sprockets "6" and "9".

4. The pumping unit of claim 1, wherein the balance weight 17 is directly hung on one end of the rope-hanging chain 13, the balance weight 17 is sunk to the ground, the other end of the rope-hanging chain is fixed on the hanging point 11 and is connected with the polished rod, and the rope-hanging chain balance system is hung on the gear teeth on the upper edge of the chain wheel head 15 and the upper edge of the guide wheel 16. And reciprocates on the two wheels.

5. The pumping unit of claim 1 or 2, wherein pitch diameters of the reversing sprocket "9" and the range-extending sprocket "10", and the range-extending sprocket "14" and the sprocket head sheave "15" are increased by a fixed ratio of 2 to 4 times.

6. The pumping unit of claim 1 or 3, wherein the sliding block "7" is fixed on the reversing chain "8" and vertically reciprocates in the sliding rail "22".