EA029822B1 - Balance-beam drive for a sucker-rod pumping unit - Google Patents

Abstract

The invention is related to the field of the petroleum-producing industry, in particular, to means for liquid medium pumping from process wells. Reduction of time expenditures for transportation and maintenance, convenience of maintenance, the possibility of smooth adjustment of the mast height, improvement of reliability and increase in service life of the wire-line string-up rope are achieved by provision of a balance-beam drive for a sucker-rod pumping unit comprising a base, a power drive with a counterweight and a crank-and-rod mechanism provided with a balance beam; a mast deflectable from the well mouth by a position regulator in the form of a pipe with ties having threads of opposite directions at its ends, the mast being provided with a crown block frame at its top end; at least two-line string-up of overturned design provided with an additional roller for suspension of the polished rod of the string of rods and with a drum with a reserve of a flexible element, wherein the drive includes two tackle systems arranged in parallel and equipped with a single flexible element embracing said additional roller to which the polished rod is suspended. In a particular case of the embodiment, both ends of the flexible element are wound with a reserve and fixed in individual drives, which makes it possible, if necessary, to let pass the flexible element of the wire-line string-up as some of its portions become worn-out, in order to improve reliability and to extend service life. The paired tackle system consisting of one single-piece rope and suspension of the polished rod by means of a pulley ensure uniformity of tensions and of effective loads in each branch of parallel tackle systems, their high reliability, easy installation and operation.

Description

The invention relates to the field of oil industry, in particular to the means of pumping a liquid medium from process wells. Reducing the time spent on transportation and maintenance, ease of maintenance, the ability to smoothly adjust the height of the mast, increase the reliability and service life of the tackle cable rope due to the fact that the balance pump drives a pumping unit containing a base, a power drive with a counterweight and a crank-connecting rod converter with the balancer, the mast, installed with the possibility of deviation from the wellhead by the position controller in the form of a pipe with rods having at the ends of the thread opposite to boards, and equipped with a crown frame on the upper end, at least a two-stringed tackle tool of an overturned structure, equipped with an additional suspension roller for a polished rod of a rod string and a drum with a reserve of a flexible element, there are two parallel talley systems arranged in parallel, equipped with one flexible element covering the above-mentioned additional roller, which is hung on a polished rod. In the particular case of performance, both ends of the flexible element are wound with a margin and fixed in individual drums, which allows, if necessary, to bypass the flexible element of the pulley attachment as its individual parts wear out to increase reliability and service life. The paired pulley system from a single solid rope and the suspension of a polished rod through the block ensure uniform tension and operating loads on each branch of parallel pulley systems, their high reliability, ease of installation and operation.

029822 Β1

029822

The invention relates primarily to the field of oil industry and can be used in the extraction of liquid minerals by submersible plunger pumps.

Known drive submersible pump installation [E. Bukhalenko, V. E. Bukhalenko. Equipment and tools for well repair. - M .: Nedra, 1991, p.23, fig.2.4], containing a base, an electric motor with a gearbox and an external single-stage gear, a balance weight with a head and a cable suspension, located on the supporting mast and connected to the drive crank by means of a connecting rod.

The main disadvantages of the known balancer drive include the fact that its design does not allow to change the stroke of the rod string over a wide range, which would improve in many cases the efficiency of the plunger pump. If it is necessary to create a long-stroke drive, its height multiplies by several times, which significantly increases its weight and dimensions, makes it difficult to transport and reduces stability in areas with strong winds.

The balancing drive of the pumping unit is known (Patent of the Republic of Kazakhstan No. 26175 MPK R 04B 47/02, published on September 14, 2012, bulletin No. 9), which contains a base, a power drive with a counterweight, a crank-connecting rod converter and a balance bar, a mast with a crown block frame on the upper end, installed with the possibility of deviation from the wellhead using a position controller in the form of a pipe with rods having threads of opposite direction and at least a two-string round-end tooling of an overturned design, one end of which is rooted An additional counterweight positioned on the side of the balance bar, equipped with an additional block, enclosed by a flexible element, thrown over the blocks of the above-mentioned crown-frame, the ends of which are fixed on the standard suspension device of a polished rod of the rod of the rods; the other end of the said pulley attachment is fixed on the base or the drum with a supply of flexible element.

The disadvantages of the known balancing drive should be attributed to the fact that its design is complicated by the suspension on the mast of an additional counterweight, and its pulley system is made in the form of two consecutive pulley rigs. At the same time, the first rigging (from the drum with the reserve of the rope to the counterweight and which is the main one) is equipped with a single branch of the pulley rope, which reduces its reliability and also complicates the installation and adjustment of the actuator stroke.

While the second pulley attachment, which is a continuation of the first (from the polished rod suspension to the counterweight block on the mast), has already paired branches of the rope on the polished rod suspension. Such a tooling scheme of a pulley system in a known drive also implies the need for two separate sections of the rope and, taking into account the above, possibly different diameters.

To eliminate these shortcomings in the balancer drive, the pumping unit contains a base, an actuator with a counterweight, a crank connecting rod converter and a balancer, a mast with a crown-block frame at the upper end, installed with the possibility of deviating from the wellhead using a position controller in the form of a connecting piece with rods , having at the ends of the thread of the opposite direction and at least a two-string pulley tooling of an overturned structure, equipped with an additional block of polished suspension About the stem of the rod string and the drum with a reserve of the flexible element, there are two parallel taleted systems arranged in parallel, equipped with one flexible element, covering the above-mentioned additional block located above the polished rod. In the particular case of execution, the drive has one more additional drum with a reserve of a flexible element, which allows you to bypass the flexible element of the pulley attachment as its individual parts wear out to increase reliability and service life.

The paired pulley system of one solid rope and the location of the block on the polished rod suspension ensure uniform tension and operating loads on each branch of parallel pulley systems, their high reliability, ease of installation and operation.

The invention is illustrated by graphic applications, where in FIG. 1 shows the design of the balancing drive of the pumping unit; in fig. 2 - suspension block of polished rod with the possibility of balancing the loads and tensions of parallel branches of the pulley systems; in fig. Figure 3 shows diagrams of possible variants of a pulley attachment for a three- or four-string construction (side view). For convenience of explanation, paired blocks of parallel track systems are designated by numbers on the figures with the index (a) and without.

The balancing drive of the pumping unit (see Fig. 1) consists of the base 1, on which the power drive 2 is mounted with a crank connecting rod torque converter of the electric motor to oscillatory movement of the balance weight 3, pivotally mounted on the balance weight support 4. The drive has a telescopic mast consisting of a support 5 and a sliding 6 parts with a position lock 7. The pull-out part of the mast 6 has a crown-shaped frame 8. The mast is equipped with a deflecting device 9 (hereinafter, the regulator 9), having a traction element, with standing out of the socket 10 with threads cut on the opposite ends of. On the one hand, the pipe 11 is screwed into the pipe 10, and on the other hand, the rod 12, which has a cavity 13, which may include the rod of the rod 11. The length of the screw thread of the rod 11 exceeds that of the rod 12. The rod 11 may be equipped with a worm gear 14 for braking and independent rotation. The regulator 9 has a coupling 15, covering the support part 5 of the mast.

Through the paired blocks 16 (16a) and 17 (17a) of the crown-frame frame 8 (Fig. 2), branches 18 (18a) of the gib-1 029822 are thrown

This element covers an additional block 19, which serves to suspend the polished rod 20 and equalize the tension and loads of parallel flexible branches of the pulley attachment 18 (18a).

From the crown block, the parallel branches of the flexible element successively cover paired blocks 21 (21a) at the base of the drive, paired blocks 22 (22a) fixed on the left side of the balance bar 3, paired blocks 23 (23a) at the base of the drive and are wound with a margin on the drums 24 (24a ) and locked by a worm drive 26. After completion of rigging with a rope of a pulley system, a polished rod 20 is suspended to block 19. If necessary, smooth variation of the stroke of the polished rod 20 is partially reloaded (or wound) from the drum 24 or 24a with worm gears 26

After connecting to a power source (not shown in graphic applications), the drive is ready for operation. Due to the impact of the connecting rod 27 on the right shoulder of the balancer 3, its left shoulder, with the block 22 (22a) mounted on it, begins to rise to the upper position, dragging the ropes of tackle accessories.

As a consequence, the branches 18 (18a) of the cable suspension are shortened and lift the polished rod 20 with the column rods by a set amount of lift. The counterweight 28, which occupies the upper position during the descent of the rod column, also helps to perform this operation.

Thus, a plunger pump (not shown in the figures of graphic materials) pumps out a liquid medium.

FIG. Figure 3 shows the layout of elements of a parallel tackle tooling, which also makes it possible to obtain three- or four-string systems with a multiple increase in the stroke length of the polished rod of standard pumping units by three or four times, respectively. To do this, on the left end of the balance bar next to the paired blocks 22 (22a) additional paired blocks 25 (25a) are installed.

To increase the stroke length of the polished rod three times, a three-stringed pulley tool with strings B, C, D is required. For this, the ends of the flexible element are fixed in blocks 25 and 25a with clamps 27 and 27a on the left end of the balance bar 3.

To increase the stroke length four times, a four-stringed tackle equipment with strings B, C, D, E is needed. For this, the ends of the flexible element encompass blocks 25 and 25a, are wound on drums 24 and 24a and fixed by a stopper 26.

The installation and operation of the balancer drive pump unit installation (hereinafter drive) is as follows. The drive is mounted on a foundation in accordance with FIG. 1. Then from one of the reels 24 or 24a secured on the base 1, on which the entire stock of the flexible element is pre-wound, one end of the flexible element 18 (hereinafter the rope) is successively transferred, depending on the rigging (for example, with four string), through appropriate blocks 25, 23, 22, 21, 17, 16, and then, after covering an additional block 19, through the corresponding blocks 16a, 17a, 21a, 22a, 23a, 25a, and is attached to the drum 24a, forming two parallelly spaced tackles.

Thus, the described drive allows within wide limits to change the stroke of the pump plunger both by changing the position of the connecting rod on the crank, and by the number of strings in parallel talley toolings of the drive.

Claims (2)

CLAIM 1. Balancing drive pumping unit containing base, power drive with counterweight, crank converter and balance bar, mast installed with the possibility of deviation from the wellhead position regulator in the form of a pipe with rods having at the ends of the thread in the opposite direction, and equipped with crown-block a frame at the upper end, at least a two-stringed pulley tooling of an overturned structure, equipped with an additional suspension unit of a polished rod of a rod string and a drum with ace, characterized in that it is arranged parallel to the two tackle system equipped with a one-piece flexible member spanning said further roller, articulated suspension polished rod. 2. Balanced drive according to claim 1, characterized in that it has an additional drum at the other end of the flexible element. - 2 029822