SU1541408A1 - Long-stroke sucker-rod pump - Google Patents

Abstract

The invention makes it possible to increase the efficiency of operation of the balancing-type pumping unit. Motor 2 and gearbox 3 are mounted on frame 1 and are interconnected. On the output shaft 4 of the gearbox 3, cranks 5 are placed, connected by means of fingers to rods 7, to-rye through traverse 8 are connected to a two-arm balance bar (B) 9. B 9 is mounted on a rack 10 located on frame 1. Head 12 B 9 has rollers 13 with passing through them a flexible link 14 in the form of ropes 15. The ends 16 of the ropes 15 are connected to the suspension 17 of a polished rod, the free ends 18 are connected to the ends 19 of the ropes 20 by means of the crosspiece 21 and are installed with the possibility of passing through the pulleys 11. The ends the ropes 20 are connected with cranks 5 by hinges 22. Pulleys 11 are mounted on three day shoulder 24 B9 to-Roe 25 is provided with a mechanism controlling the stroke length reciprocates the moving element. The element is connected with the pulley 11. The mechanism 25 is made in the form of a screw-nut transfer. The nut is mounted with the possibility of reciprocating movement, the screw is movable and is located in the supports 29. The supports 29 are made in the form of sleeves fixed at the ends of the shoulder 24. Traverse 21 is located between the shoulder 24 and the cranks 5. The fingers are provided with slats 31, -yry installed hinges 23. 3 Cp. f-ly, 4 ill.

Description

25

3

3

The invention relates to drives for 20 well sucker-rod pumps, in particular, to long-stroke rocking machines of balance type, and can be used in the oil and gas industry.

The purpose of the invention is to increase operational efficiency,

FIG. 1 is a schematic representation of a long stroke rocking machine, general view; in fig. 2 - the same, top view; in fig. j-mechanism for adjusting the stroke of the polished rod; in fig. - the dependence of the suspension point of the rod column on the angle of rotation of the crank (1 - basic rocking machine; 2 - the proposed long stroke rocking machine with the extreme left position of the mechanism for adjusting the stroke of the polished rod; 3 the same, / with the extreme right position of the mechanism for adjusting the stroke length polished rod).

The long-wheeling pumping unit contains electric motors 2 and gearbox 3 mounted on frame 1 and connected to each other on output shaft k of gearbox 3 cranks 5, connected by means of fingers 6 to rods 7 which are connected to two shoulders balancer 9 mounted on rack 10 located on frame 1, pulleys 11, balancehead head 12 having rollers 13 with flexible connection 1 passing through them in the form of ropes 15, one ends 16 of which are connected to suspension 17 of polished rod (not shown), and free ends 18 - with one of ATCs 19 of Additional ropes 20 by

five

five

thirty

35

0

- oh

50

additional spreader bar 21 and mounted for passage through pulleys 11, with the other ends 22 of additional ropes 20 being connected to cranks 5 by means of hinges 23. Pulleys 11 are mounted on the rear arm 2 of balance bar 9, which is equipped with a mechanism for adjusting the length of the polished Itok with returnable - an accessory movable element 26, the latter being connected with pulleys 11. The stroke adjustment mechanism 25 of the polished rod is made in the form of a transfer screw 27, a nut 28, the nut 28 of which is installed with the possibility of returning atno translational movement, and the screw 27 ™ rotatably located in the supports 29, the supports are made in the form of sleeves 30 fixed on the rear ends of the rocker arm 2k. Additional yoke 21 is located between the rear shoulder 2k of the balancer and the cranks 5. The fingers 6 are provided with strips 31 in which the hinges 23 are mounted.

Long-stroke pumping unit works as follows.

The torque is transmitted from the electric motor 2 through a V-belt transmission (not shown) to the drive shaft (not shown) of the gearbox 3 and then through its output shaft k to the cranks 5 and the connecting rods 7 connected to it, thereby driving the two shoulders balance bar its head 12. In turn, the additional ropes 20 set in motion an additional yoke 21 and the main ropes 15 of the flexible coupling 14 connected to it, connected to the suspension 17 of the polished rod. Relocate515414

The main ropes lj of the flexible coupling 14 relative to the two-arm balancer 9 are carried out along the pulleys 11 and the rollers 13.

With the leftmost position of the nut 28, the transmission screw-nut of the mechanism 25 for adjusting the stroke of the polished rod together with the pulleys 11 is the stroke of the polished itok doubled (Fig. K), which is provided by the bars 31 that are angled to the cranks 5 in the range 80-85 ° In this case, the distance between the axis of the hinge 23 and the axis of the finger 6 is 10

J5

pin 5 is determined from the ratio a - b. jj,

where a is the distance between the axis of the hinge 23 and the axis of the finger 6 of the crank 5;

B is the distance from the nut 28 with the pulleys 11 to the traverse axis 8; g - the radius of the crank 5; d is the distance from the axis of the output shaft 4 of the gearbox 3 to the axis of the crosspiece 8.

When moving the nut 28 of the transmission screw - nut mechanism 25 adjusting the stroke of the polished rod to the extreme right position by means of the screw 27 provides a smooth reduction of the stroke of the polished rod (Fig. 4) to the same values as with conventional pumping machines, however, the suspension point the borehole pump plunger (not shown) rises to a height equal to the movement of the nut 28 of the extremely

left to the extreme right position, and the stroke length of the polished rod is determined from the ratio J (if the arms of the two shoulders are equal, 9):

2g

4r + (k-b) (1-),

with.

S is the stroke length of the polished rod;

g is the radius of the crank;

k is the length of the rear arm 2k balance 9;

B is the distance from the nut 28 with the pulleys 11 to the axis of the traverse 8.

Claims (4)

1. Long-wheeling pumping unit containing an electric motor and a gearbox mounted on the frame and interconnected by a crank on the output shaft of the gearbox, connected by means of fingers to a connecting rod, which are connected to the two-shouldered balancer mounted on the frame , pulleys and the balancer head, having rollers with a flexible bond passing through them in the form of ropes, one ends of which are connected to the suspension of a polished rod, and their free ends are connected to one of the ends of additional ropes An additional cross member is installed with the possibility of passing through the pulleys, and the other ends of the additional ropes are connected to the cranks by means of hinges, characterized in that, in order to increase the efficiency of operation, the pulleys are mounted on the rear shoulder of the balancer, which has a polished stroke length adjustment mechanism. rod with reciprocating moving element, the latter being connected with pulleys. 2. The rocking-machine, as set forth in claim 1, is described in that the mechanism for adjusting the stroke length of the polished rod is made in the form of a screw-nut transfer, the nut of which is installed with the possibility of reciprocating movement, and the screw rotatably and located in the supports, while the supports are made in the form of sleeves attached to the ends of the rear axle of the balancer. 3. The rocking machine in accordance with claim 1, in connection with the fact that the additional traverse is located between the rear shoulder of the balance bar and the cranks. 4. A rocking-machine, as claimed in Claim 1, characterized in that the fingers are provided with slats in which hinges are mounted, N FIG. one Editor I. Shmakov Compiled by J. Ginzburg Tehred L. Oliynyk Proofreader A.Obruchar Order Circulation kS7 8NIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 4/5, Moscow, Zh-35, Raushsk nab. 113035 Production and Publishing Combine Patent, Uzhgorod, st. Gagarin, 101 Fig.Z Subscription