RU101496U1 - DEVICE FOR OPENING THE INPUT CHANNEL OF THE RECEPTION CHAMBER OF THE DEPTH SUCTION SAMPLE - Google Patents

Abstract

 A device for opening the inlet channel of the intake chamber of the deep suction sampler, including a valve, a working piston, a spring, an adjusting bolt and a nut, the valve being connected to a working piston, which is loaded with a spring preloaded with an adjusting bolt and a nut.

Description

The utility model relates to the oil industry and is intended for the modernization of devices used in the selection of deep oil samples, prefabricated.

All well-known technical solutions implemented in the device for sampling in the well contain ballast and receiving chambers, control mechanisms for opening the shut-off valve and hydro-pneumatic resistance for braking the formation fluid taken into the receiving chamber.

A device for sampling formation fluid in a well, comprising at least two sampling units, each of which is made in the form of a ballast chamber and an associated receiver chamber adapter, which comprises a separation piston and a shut-off valve. In the adapters of the receiving chamber there is a safety needle valve made in the form of a locking needle, a calibrated spring and a pressure nut installed with the ability to control the locking force (RF patent No. 2078206, IPC ⁶ ЕВВ 49/08, publ. 04/27/1997).

The disadvantages of the device include the fact that during the descent, the shut-off valve of the receiving chamber remains open, as a result of which the borehole fluid begins to flow into the receiving chamber at a predetermined depth, thereby taking a sample that is not representative. The disadvantages of this device also include the fact that when the set pressure is reached, the needle valve of the receiving chamber sharply opens due to the lack of a restraining mechanism, and the piston located in the receiving chamber also starts a sharp upward movement, quickly displacing the working fluid into the ballast chamber. The pressure in the receiving chamber becomes lower than at the sampling point, and this leads to the degassing of the oil sample, which negatively affects its representativeness.

Known suction deep sampler BPP-300, which includes a device for opening the input channel of the receiving chamber, including a valve assembly with a valve and a pre-valve, a filter, a rod, a piston, a piezo actuator, hydraulic resistance, a ballast chamber, a tip (a sampler suction piston VPP-300: passport - Nefteavtomatika Plant).

The disadvantages of this sampler are a complex design that requires careful maintenance, a high percentage of device failure due to clogging of the piezoelectric drive capillary, which leads to additional time costs for re-sampling. The disadvantages include the time-limited mechanism of opening and subsequent closing of the shutoff valve, since the mechanism starts at the beginning of the device lowering into the well (when external pressure appears), and during the idle stroke of the piezoelectric actuator (time before the valve assembly opens), the sampler must be delivered to preset sampling depth. If an unexpected stop occurs during the descent of the device into the well, the valve assembly valve will not open at a predetermined depth, which will lead to the selection of a non-representative sample and, as a result, to the necessity of re-lowering the sampler.

The runway-300 operation is confirmed by the field data presented in table 1.

Table 1 Deep reservoir oil sampling at the South Sotchemyuy and North-Iraqi fields Number of descent of the device (camera) Runway-300 with piezo drive one Sample taken at 70% 2 Sample 100% 3 Sample 100% four Clogged capillary of piezoelectric drive. No sample taken

The objective of the claimed utility model is to create a device for sampling deep oil samples, which allows to improve the quality and reliability of sampling, reducing the total time spent on sampling by reducing its "idle" runs.

The task in the device for opening the input channel of the receiving chamber of the deep suction sampler is solved in that it contains a valve, a working piston, a spring, an adjusting bolt and a nut, while the valve is connected to a working piston, which is loaded with a spring, preloaded with an adjusting bolt and a nut .

The device for opening the input channel of the receiving chamber of the deep suction sampler is illustrated using graphic materials, where Fig. 1 shows the device itself, and Fig. 2 shows an example of a mounted device in the VPP-300 deep suction sampler.

A device for opening the input channel of the receiving chamber contains a valve 1 connected to a working piston 2, loaded with a spring 3, in contact through a plate 4 with an adjusting bolt 5 and a nut 6, mounted in the working chamber 7 with holes 8.

The operation of the claimed device is illustrated with the help of the VPP-300 deep suction sampler with a device mounted therein to open the receiving chamber channel of the deep suction sampler.

When preparing the deep suction sampler for sampling, place the device in the working chamber 7 of the sampler, matching valve 1 with inlet channel 10, adjust valve 1 to open at a given reservoir pressure of sampling. To this end, with the help of the adjusting bolt 5 and nut 6, the spring 3 is compressed by a strain value corresponding to a given opening pressure according to the calibration dependence presented in table 2. Spring 3 through the working piston 2 transfers force to the valve 1, which closes the input channel 10 of the receiving chamber 9.

table 2 No. / No. Spring deformation, mm * Valve opening pressure, MPa one 10 8.40 2 12 9.76 3 fourteen 11.81 four 16 13.34 5 eighteen 14.47 6 twenty 16.39 7 22 17.72 8 24 18.92 9 26 20.70 10 28 21.90 eleven thirty 23.75 12 32 25,20 * Screw with thread M12x1 (a full revolution of the screw compresses the spring by 1 mm); Spring characteristic: outer diameter - 20 mm, wire diameter - 3 mm, number of turns - 10 mm, spring length in loaded state - 73 mm.

When the sampler moves down the well through the openings 8, oil will enter the working chamber 7, creating pressure on the working piston 2, which will increase with increasing depth of descent. Upon reaching a given reservoir pressure at the sampling point, the working piston 2, overcoming the resistance of the spring 3, is shifted, and the valve 1 opens the inlet channel 10 of the receiving chamber 9 of the deep suction sampler. The reservoir oil enters the inlet channel 10 of the receiving chamber 9, creating pressure on the shut-off valve 11 of the receiving chamber 9 and pressing the calibrated spring 12. The shut-off valve 11 opens, and the oil enters under the dividing piston 13 of the receiving chamber 9. After filling the breakdown of the receiving chamber 9, when the separation piston 13 will reach the stop plug 14, the pressure outside and inside the intake chamber 9 is equalized, and the shut-off valve 11 closes under the action of the calibrated spring 12, locking the oil sample in the intake chamber 9.

The operation of the BPP-300 with the device mounted therein to open the inlet channel of the intake chamber of the deep suction sampler is confirmed by field data on the selection of deep samples of reservoir oil at the South Sotchemyu and North-Iraqi fields shown in table 3.

Table 3 Deep reservoir oil sampling at the South Sotchemyuy and North-Iraqi fields Number of descent of the device (camera) Runway-300 with a device for opening the input channel of the receiving chamber of the deep suction sampler one Sample 100% 2 Sample 100% 3 Sample 100% four Sample 100%

Claims (1)

A device for opening the inlet channel of the intake chamber of the deep suction sampler, comprising a valve, a working piston, a spring, an adjusting bolt and a nut, the valve being connected to a working piston, which is loaded with a spring preloaded with the adjusting bolt and a nut.