SU717295A1 - Deep-well pumping unit - Google Patents

Description

(54) DEEP-PUMP INSTALLATION.

The invention relates to the production of oil, namely, devices for the simultaneous separate operation of two layers through one well.

 A well-known submersible installation for the simultaneous separate operation of two layers, comprising tubing and rod columns, a packer and a submersible pump, the selection of formation production being controlled by fittings. Production of the layers is mixed After fittings and, through the suction valve into the pump, is pumped out to. surface 1.

/ ...,

The disadvantage of this setup is the difficulty of determining the flow rates of each of the exploited formations, and hence the difficulty of adjusting the selections.

Closest to the invention is a pumping unit for simultaneous separate operation of two layers through one well, comprising tubing and rod columns, a packer and a pump with a suction valve 2.

The disadvantage of this setup is that when one of the strata is disconnected, the established selection mode of the other is broken.

The purpose of the invention is to provide a certain quantitative ratio of fluid withdrawals from the formations, by eliminating the hydrodynamic influence of one formation on another.

This is achieved by the fact that the suction

the valve is made in the form of a housing with a clamp, seal and radial channels made on both sides of the seal, which is placed in the housing of a spring-loaded spool with a figured groove on the side surface for

placing a retainer in it, and when the spool moves axially, the latter forms channels with the body, which alternately connect each of the layers with the pump intake.

20

FIG. 1 is a schematic representation of a depth pumping installation; in fig. .2 shows the suction valve; in fig. 3 - - scanning the side surface of the spool. The depth pumping installation has a tubing string 1, a string of booms 2, a packer 3, a pump 4, a support 5 and a suction valve 6. The suction valve b has a housing 7 with a retainer 8, a seal 9 and radial channels 10 on both sides of the seal 9 ; And spool spring loaded 12. On the side surface of spool 11 there is a figurine groove 13, the shape of which is determined by the number of required swing cycles depending on the produced fluid from each layer (see Fig. 3). Figurn groove 13 is designed to accommodate the latch 8. Spool 11 through nakr. The spider 14 and the cup 15 are connected to a switching unit, which consists of nipples 16, bushings 17 and sealing elements 18. At the upper end of the nipples 16 are mounted a saddle 19, a crater 20 and a cage 21. In the middle part of the cup 15 there are windows 23 designed for flow fluid into the pump (see fig. 2). The installation works as follows. The suction valve 6 is screwed onto the lower end of the cylinder of the pump 4 instead of the conventional suction valve. Suppose that the retainer 8 is located at point 23. At this point, the plunger of the pump 4 begins to move downward, i.e. the injection process begins, the ball 20 closes the saddle 19, and takes on the load from the weight of the liquid column. When this happens, the spool 11 in the housing 7 moves together with the switching unit down until the stop 24 ends into the surface 25 - the spring 12 is compressed and the latch 8 goes to point 26. When the plunger moves up (during the suction process), the load from the ball 20 is relieved and the spool 11, together with the switching unit, is moved upward by a small distance under the action of the spring 12 and the latch 8 takes a position in step 27. At the same time, the switching unit connects the lower group of holes 10 to the pump intake and the suction takes place from the lower layer ( Since the hole on the glass 15 coincides with the lower apertures 10 on the housing 7). ; .. During the subsequent downward movement, i.e., the next cycle of the injection process, the spool 11 moves down again and the retainer 8 from point 27 moves to point 28, and during the plunger stroke upwards again under the action of the spring 12, the spool 11 together with the switching unit rises to its original position and the latch 8 is placed in step 23. In this case, the switching node connects the upper group of holes 10 to the pump and the suction from the upper layer (as the holes in the cup 15 coincide with the upper holes 10 on the housing 7). In one way, two pumpings are sucked into the pump cylinder alternately: once - from the bottom and once - from the upper layer. Well-pumping program-production can be set to almost anyone. For example, one suction from the top, the reservoir, one. from the bottom. The ratio will be - | - 1.0 or one from the top, two from the bottom -g-0.5, two from the top, one from the bottom - 2.0. If you install a theoretical pumping capacity for a deep-well installation, equal to the total theoretical performance of two layers, then, by performing a suction valve, it is possible to pump out the production of two layers simultaneously and separately by adjusting the number of swings for each object. So, with the theoretical performance of the upper object, and the lower QH 10, the ratio of the number of swings will be 2.0, i.e. it is necessary to install a program with two swings on top and one on the bottom. Obviously, the dynamometer diagram of the installation with the data for performing the suction valve will have two load lines due to the weight of the fluid (except for the case when the pressure at the pump intake in both layers is the same, which is rarely encountered). Based on the dynamogram of the actual theoretical performance, the Reservoir rates are set. The presence of the fluid weight line on the dynamogram, individually for each layer, makes it possible to determine the dynamic level for each object and carry out relevant studies. Thus, the deep pumping installation with this suction valve allows determining the flow rate (of each layer) and the dynamic level of each of the layers during steady state operation of the installation. Knowing the flow rates of the layers under a certain mode, it is possible to regulate the flow rate of each of them with the help of replaceable spools. Periodic absorption of products from each layer. Depending on the installed program allows

to establish control over the supply from each of the two operated facilities by dynamitating.

The presence of two fluid load sensing lines on the dynamogram allows us to determine the location of the dynamic level of each of the layers separately.

Data on flow rates and dynamic level and the possibility of establishing virtually any program by replacing the spool make it possible to adjust the formations. The economic effect of the use of the invention in the shtangol method, the depth-pumping method, due to the research possibilities outlined above, will be to establish the optimum mode of operation, i.e., to obtain maximum production at the lowest possible cost.

Claims (2)

Invention Formula Deep pumping unit for simultaneous separate operation of two layers through one well, containing columns of tubing pipes and rods, a packer and a pump with a suction valve, characterized in that, for the purpose of tank, the liver has a certain quantitative ratio of fluid withdrawals from the layers by eliminating hydrodynamic the influence of neither layer on the other, the suction valve is made in the form of a housing with a clamp, a seal and radial channels made on both sides of the seal, concentric Nogo spring loaded spool on the side surface for receiving therein the retainer, wherein upon axial movement of the spool with the latter forms a channel body, reporting alternately each of the reservoirs to the pump intake. j Sources of information taken into account in the examination 1. R. Maksutov et al. Simultaneous separate exploitation of multilayer oil fields. M., “Nedra, 1974, e. 104. 2. Experience of simultaneous separate operation of several layers through one well (thematic scientific and technical reviews). Seri Extraction, M., VNIIOENG, 1971, p. 66-67 (prototype). 18 I U vx -y Th fi tb 4 717295