RU2573658C1 - Sampler for high-viscous oil - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: sampler comprises a tubular body with elements connected at ends and built-in samples taking and receiving facilities, a spring-loaded valve for receipt and drainage of taken sample to a reserve capacity and drive, at that the sampler body is composite - it consists of the upper and lower part connected by flanges; the upper part is equipped with hydraulic cylinder with spring-loaded piston, which rod is connected to spring-loaded drive bushing supported by plunger and its above-piston space is interconnected hydraulically with above-piston space of the drive hydraulic cylinder, which piston rod is pivoted to the rod of electrohydraulic pusher coupled electrically to the controller, which form in aggregate with the drive hydraulic cylinder drive of the sample, lower part of the body with guide tube installed inside is interconnected with cavity of the sampler body, inside the guide tube there is a hollow sample cutter with spring-loaded rolling pin, which is designed to move axially; the above sample cutter by pins is connected by its upper end via connecting link to the lower end of drive bushing and by its lower end it is connected to cavity of the flow stabiliser that concentrates flow through the whole cross-section of the pipeline in the sampling zone by the cutter; a body of sample receiving facility is made as a stepped cylinder with the central channel and mounted axially to a body of sample taking facility, its lesser step is equipped with spring-loaded bushing and sealing ring at outer surface and interconnected with cavity of the flow stabiliser, at that its diameter is made less than inner diameter of the sample cutter in order to interface them upon release of spring-loaded bushing by the cutter.

EFFECT: simplified design.

2 cl, 6 dwg

Description

The invention relates to the oil and gas industry, in particular to oilfield equipment for sampling well products in the form of a highly viscous gas-liquid mixture (GHS).

A known rod-type sampler (see patent for utility model No. 40763, IPC 7 ЕВВ 49/08, 01 No. 1/10, publ. September 27, 2004, bull. No. 27), containing a pipeline for the transportation of GHS, stuffing box, housing in the form of a pipe welded to the pipeline, a ball valve and a hollow rod made removable with the possibility of its descent and sampling of liquid from any level in the pipeline, contains a measuring scale installed in its lower part, and in the upper part of the hollow rod there are handles and a tap with valve for draining the sample.

A sampling device is also known (see the description of the patent No. 2151290, IPC 7 ЕВВ 49/08, 33/03, 47/00, 1/10 publ. 06/20/2000, bull. No. 17), comprising a housing, a manual drive , a sampling device with the possibility of rotation on rotary supports with a spring-loaded valve, a crane with a handle for draining the selected sample into the storage tank and a spring-loaded movable rod.

This device is in technical essence closer to the proposed one and can be adopted as a prototype.

A common drawback of the known analogues is poor sampling, since sampling is carried out from the pipeline when the GHS is in a heterogeneous state. It is known that GHS in the pressure pipe is stratified - the released gas occupies the upper part of the flow, the middle one - oil, and the heavier fraction - water occupies the lower part, so the information from the selected sample is distorted, unreliable due to the lack of means for homogenization. In addition, both devices are complex in design and low-maintenance.

The technical task of the present invention is to obtain reliable information in the selected sample about the parameters of the gas-liquid mixture using a device with a simpler design and less time-consuming to maintain due to the mechanized method of operating the sampler.

The stated technical problem is solved by the described sampler, comprising a tubular body with connecting elements at the ends and mounted sampling and receiving devices, a spring-loaded valve for receiving and discharging the selected sample into the storage tank and drive.

What is new is that the sampling device case is made integral — the upper and lower, connected by flanges, the upper of which is equipped with a hydraulic cylinder with a spring-loaded piston, the rod of which is connected to a spring-loaded drive sleeve resting on the plunger, and its over-piston space is hydraulically connected to the over-piston space of the drive hydraulic cylinder the piston rod of which is pivotally connected to the rod of an electro-hydraulic pusher electrically connected to the controller, which together form a drive cylinder, a sampler drive, a lower case with a guide tube installed inside, is connected to the sampler body cavity, a hollow sample cutter with a spring-loaded rolling pin inside is installed inside the guide tube, the said cutter is connected with the upper end with pins through the connecting link to the lower end of the drive sleeve, and the lower end communicates with the cavity of the body of the flow stabilizer concentrating the flow of the entire cross section of the pipeline in the sampling area by means of an element, the body of the sampling device is made in the form of a stepped cylinder with a central channel and mounted coaxially with the body of the sampling device, its smaller stage is equipped with a spring-loaded sleeve and a sealing ring on the outer surface and is in communication with the cavity of the flow stabilizer, while its diameter is chosen smaller than the inner diameter of the cutter samples to be able to dock with each other after the spring-loaded sleeve is pressed by the cutter.

Also new is the fact that the tubular body of the flow stabilizer is installed inside and in the center of the sampler body in the area of the sampling and receiving devices, with slots made on the inlet side of the stream, spaced at equal distances from each other, where the flow-guiding wings are mounted, communicated with them by their cavities made in the form of slits of a U-shaped cross section, and the conditional diameter of the circumscribed circle around the wings from the inlet side of the flow is equal to the inner diameter of the body to cover the whole cheniya flow.

Previously, patent research for novelty was carried out according to the patent fund of the TatNIPIneft Institute of OAO Tatneft to a depth of 20 years. An analysis of the known technical solutions in this technical field showed that the claimed technical solution has features that are not in the analogues, and their use in the claimed combination of essential features allows us to obtain a new technical result, therefore, we can assume that the claimed technical solution meets the conditions of patentability "novelty "And" inventive step ".

The above figures illustrate the essence of the claimed sampler, where in FIG. 1 shows a General view of the sampler, arranged with the drive, when the nodes and parts are in the initial position in the section, where you can see the tubular body of the sampler with a flow stabilizer inside and with mounted sampling and receiving devices and a drive containing an electrohydraulic pusher and a hydraulic drive cylinder, interconnected rods articulated.

In FIG. 2 - the lower part of the sampler, where a part of its body is visible with a flow stabilizer installed inside and a sample cutter connected with it with a rolling pin installed inside, when they are in the initial position, the sample receiving device is also seen in section.

In FIG. 3 is the same as in FIG. 2 is a sectional view of arrow A.

In FIG. 4 is the same as in FIG. 2, when the cutter, dropping down, passed through the tubular cavity of the flow stabilizer body, at which the sample was taken and reached the extreme lowest point, in a section.

In FIG. 5 is the same as in FIG. 4, when there was an extrusion of the selected sample by the cutter with a rolling pin, in a section.

In FIG. 6 is a flow stabilizer in partial section.

The sampler contains a tubular body 1 (see Fig. 1) with connecting elements at the ends in the form of flanges 2 and 3 with a GJS flow stabilizer installed inside the center, a sampling and receiving device, as well as a drive.

The sampling device contains a composite housing 4 and 5 (see Fig. 1) - the upper and lower, respectively, mounted vertically, connected by flanges 6 and 7. To the upper end of the housing 4 is attached a hydraulic cylinder 8 with a piston 9, preloaded by a spring 10 and provided with a rod 11, The drive sleeve 13 connected to the spring-loaded spring 12, supported by the plunger B. The under-piston space of the hydraulic cylinder 8 is communicated by a hydraulic line 14 with the over-piston space of the drive hydraulic cylinder 15, with a piston 16, the rod 17 of which is pivotally connected to the rod 18 of the electric hydra a pusher 19 electrically connected to a controller (not shown). The drive hydraulic cylinder 15, the electro-hydraulic pusher 19 and the controller together comprise the drive of the sampler.

Inside the lower case 5, a guide tube 20 is installed, in which, with the possibility of axial movement, a hollow sample cutter 21 is installed with a spring 22 pressed with a rolling pin 23. The lower case 5 is connected to the body cavity 1 through its opening 24, and the sample cutter 21 is the upper end using a pin (not shown) through a link 25 is connected to the lower end of the drive sleeve 13.

The sampling device (see Figs. 1 and 2) is made in the form of a stepped cylinder with a central channel 26 and is mounted at the bottom of the housing 1 coaxially to the housing 5 of the sampling device. Its smaller stage 27 is equipped with a spring-loaded spring 28, a sleeve 29 and a sealing ring 30 mounted in an annular groove made on its outer surface, and in a large stage 31 there is a ball valve 33 pressed by a spring 32, in communication with the central channel 26 and side drain channels 34 and 35, equipped with taps 36 and 37, respectively.

The flow stabilizer (see Figs. 1 and 6) is a tubular body 38 mounted inside the center of the sampler body 1, in the area of the sampling and receiving devices, which plays the role of a directing flow. On the inlet side of the flow, slots 39 are made in said body, spaced at equal distances from each other, with flow cavities 40 communicating with their cavities made in the form of U-shaped slots in the cross-section (see Fig. 6). The nominal diameter of the described the circumference around the mentioned wings from the inlet side of the stream is equal to the inner diameter of the body 1 to cover the entire cross section of the stream and concentrate it in the body 38 - the directing stream. The latter, on the flow exit side of the casing 38, is provided with a mounting ring 41. Coaxial to the openings 24 and 24a of the casing 1 in the casing 38 of the flow stabilizer are coaxially made openings 42 and 43 (see Fig. 2), with which the shut-off device 21 of the sampling device and the smaller stage 27 are connected sampler cylinder respectively. If necessary, the housing 1 can be equipped with a sampler 44 (see Fig. 1) with a manual drain valve 45.

The sampler works as follows.

It is assembled as shown in FIG. 1, mounted stationary on the flow line of the mouth of the producing well, preferably on the pressure line of the bypass line using a flange connection using the flanges 2 and 3 of the housing 1. Next, the over-piston cavity of the drive hydraulic cylinder 15 is connected by a hydraulic line 14 to the over-piston cavity of the hydraulic cylinder 8, after which this hydraulic system is filled machine technical oil. In this case, the details of the sampling and sampling devices are in the initial position, as shown in FIG. 1 and FIG. 2. Before starting work, the taps 36 and 37 of the sampler are opened, and the valve 45 of the manual sampling 44 is closed. At the command of the controller, the electrohydraulic pusher 19 is turned on. The latter, through its rod 18 and the rod 17 pivotally connected to it with the piston 16 of the drive hydraulic cylinder, begins to move upward, exerting pressure through the hydraulic line 14 on the piston 9 of the hydraulic cylinder 8, which comes in translational motion with its own rod 11 begins to move down the drive sleeve 13, and the associated sample cutter 21, compressing its return spring 12. Continuing downward movement, the cutter enters the cavity of the stabilizer body 38 through the opening 42 (see Fig. 4) and cuts off part of the GHS flow there, i.e., the sample is taken. Further, continuing to move downward, it passes through the hole 43 of the flow stabilizer and, squeezing the spring-loaded sleeve 29 of the lower stage 27 of the sampling device, sits with the locked sample on the o-ring 30 (see Fig. 5). In this case, the piston rod 11 of the piston 9 of the drive hydraulic cylinder 8, while continuing to move downward through the drive sleeve 13, moves the plunger B, which, having reached the brisk part of the rolling pin 23, moves it down, thereby squeezing the GWF sample from the cutter cavity under excessive pressure, under the action of which the bypass valve 33 is squeezed, opening the sample outlet for feeding it into the storage tanks 46 and 47 along the lateral channels 34 and 35. At the same time, having reached its highest position, the rod 18 of the electro-hydraulic pusher 19 and the associated rod 17 with the piston 16 Nogo cylinder, and a rod 11 with a hydraulic cylinder piston August 9, cutter 20 and the plunger 23 by the return springs 10, 12 and 22 are reset. If necessary, the cycle is repeated at the command of the controller according to the program.

The technical and economic advantage of the proposal is as follows.

Using the proposed sampler will provide reliable information on the composition of the reservoir products by improving the quality of the sample taken, which will improve the accuracy of the determined technological parameters and thereby ultimately allow optimal development of oil reservoirs.

Field tests of the sampler have yielded positive results.

Claims (2)

1. A sampler for highly viscous oil, comprising a tubular body with connecting elements at the ends and mounted sampling and receiving devices, a spring-loaded valve for receiving and discharging the selected sample into the storage tank and actuator, characterized in that the sampling device case is made integral - upper and lower, connected by flanges, the upper of which is equipped with a hydraulic cylinder with a spring-loaded piston, the rod of which is connected to a spring-loaded drive sleeve supported by a plunger, and its the piston space is hydraulically in communication with the piston space of the drive hydraulic cylinder, the piston rod of which is pivotally connected to the rod of the electro-hydraulic pusher electrically connected to the controller, which together with the drive hydraulic cylinder drive the sampler drive, the lower housing with the guide tube installed inside the cavity, connected to the cavity inside the sampler body, pipes with the possibility of axial movement mounted hollow sample cutter with spring-loaded rolling pin inside three, the said cutter with its upper end is connected by pins through the connecting link to the lower end of the drive sleeve, and the lower end is connected to the cavity of the flow stabilizer body, which concentrates the flow of the entire cross-section of the pipeline in the sampling area by the cutter, the sample receiving case is made in the form of a stepped cylinder with a central channel and mounted coaxial to the body of the sampling device, its smaller stage is equipped with a spring-loaded sleeve and a sealing ring on the outer surface and is in communication with the polo the flow stabilizer, while its diameter is chosen smaller than the inner diameter of the sample cutter for the possibility of joining with each other after the spring sleeve is pressed by the cutter. 2. The sampler according to claim 1, characterized in that the tubular body of the flow stabilizer is installed inside and in the center of the body of the sampler in the area of the sampling and receiving devices, with slots made on the inlet side of the stream, spaced at equal distances from each other, where the flow-guiding wings are mounted communicated with them by their cavities, made in the form of slits of a U-shaped cross section, and the conditional diameter of the circumscribed circle around the wings from the inlet side of the flow is equal to the inner diameter of the body for cover the entire flow area.

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