Subsurface sampler

FIELD: petroleum industry.

SUBSTANCE: invention relates to the mining industry and can be used for taking subsurface samples of oil in production and exploration wells, mainly operating by the natural flow production method. The subsurface sampler contains the receiving chamber, the upper and the lower valves, the piston, sealing assemblies, valve rods for retaining samples in the sampler, the locking mechanism, the upper head and the lower tail piece with a hole for passing the fluid; the sampler is also provided with a stirrer located in the receiving chamber between the upper and the lower valves. The piston is of cylindrical form with axial boring, in which a spring-loaded valve is accommodated. The retaining and restricting nuts are provided in the bottom of the piston. The subsurface sampler is made so that it can be connected with the valve control mechanism in the upper and in the lower parts of the sampler.

EFFECT: increased strength of the sampler and operational reliability.

2 cl, 3 dwg

 

The invention relates to the mining industry and can be used for selection of deep oil samples in operating and exploration wells, mainly working fountain method.

Famous deep sampler flow-type containing accommodated in the housing locking mechanism that interacts with the control and the controlled valve nodes and the relay device, when the valves are made with all-rubber taper angles equal to 30°and as the relay device applied butt relay, consisting of a body with holes for the pin pusher, interacting with the control valve hub and sleeve with holes for the passage of fluid, and butt relays are equipped with antennae to toe with connection tubing when moving the sampler down. (See RF patent №2265123, IPC EV 49/08, publ. 20.01.2005,).

A disadvantage of the known depth of the sampler flow type is in contact with the working fluid, which has a negative effect on the quality of the selected depth of the sample.

The closest in technical essence and the achieved result to the stated us deep sampler is a device for sampling formation fluids in the well, the piston sampler deep BCP-3, including the tip, the lower and upper valves,piston, the collet, spacer ball, lever pushers, spring, pin (see Ashalii, Kvinesdal Determining saturation pressure of the reservoir oil directly on the borehole bottom" of the Azerbaijan state publishing petroleum and scientific-technical literature. Baku, 1960, p.45-47).

A disadvantage of the known device, taken as a prototype, is the design complexity, low reliability, due to the large dead volume and the availability of "extra" parts in the camera, such as a cable, a loose collet and valve fixed ball.

The present invention is to simplify the design of the sampler and reliability in operation.

The task in the deep sampler that includes receiving chamber, the upper and lower valves, piston, seal assemblies, valve stems to hold the sample in the sampler, the locking mechanism, the upper head and the lower tip with holes for the passage of fluid, is solved in that deep sampler equipped with a mixing device located between the upper and lower valves, and the piston is made in the form of a cylindrical body with an axial groove in which is placed a spring-loaded valve, and the piston in the lower part of the holding and restrictive nuts, with deep probate the nick is made with the possibility of its connection with the mechanism control valves, as in the lower and in the upper part of the sampler.

The task is also solved by the fact that the mixing device is designed as a sleeve, the mating parts which the diameter of the holes, and made a hole in the Central part, while on the outer side of the sleeve at the same distance from each other made the slits.

The main features of the declared our invention are:

the piston is made in the form of a cylindrical body with an axial groove in which is placed a spring-loaded valve, and the piston in the lower part of the holding and restrictive nuts;

- deep sampler made with the possibility of its connection with the control mechanism of the valves, as in the lower and in the upper part of the sampler;

- deep sampler equipped with a mixing device located in the inlet chamber between the top and bottom flaps;

- mixing device made in the form of a sleeve, the mating parts which the diameter of the holes, and made a hole in the Central part, while on the outer side of the sleeve at the same distance from each other made the slits.

The above salient characteristics were not known from the sources of patent and scientific and technical and the formation and therefore are "new", which corresponds to the condition of patentability "novelty".

Declared significant features in conjunction with the known can achieve the technical result is not obvious to a person skilled in this field of knowledge that contributes to the condition of patentability "inventive step".

The claimed technical solution successfully passed field tests, which allows us to conclude that the technical solution meets the condition of patentability "industrial applicability".

Figure 1 shows the declared us deep sampler in the cut. Figure 2 shows a mixing device in section, and figure 3 shows a top view of the mixing device.

Deep sampler includes receiving chamber 1 (see figure 1), in which is placed a piston 2 o-rings 3. In the axial groove 4 piston placed the rod 5 with the lock nut 6 at the bottom and spring loaded by the spring 7, the valve 8. In the lower part of the piston 2 has a restrictive nut 9 to limit the movement of the piston 2 downward in the receiving chamber 1 and the piston 2 provided with a retaining nut 10 to prevent movement of the piston 2 in the selection process of the sample fluid.

The upper part of chamber 1 deep sampler connected to the valve hub 11, which includes SEB the rod 12 with the spring 13, sealing rings 14 and valve 15.

In the upper part of the valve, the node 11 is connected to the cylinder 16 to attach the deep sampler using wire to the winch at the deep descent of the sampler in the well (figne shown).

In the lower part of the receiving chamber 1 (see figure 1) is connected with a lug 17, which is made openings 18 for the passage of fluid.

The receiving chamber 1 between the upper valve node 11 and the piston 2 is posted mixing device 19, which includes a sleeve 20, the mating cylindrical part 21, in which the diameter of the holes 22 and hole 23 in the Central part of the fitting cylindrical part 21 (see figure 2 and 3).

On the outside of the sleeve 20 (see figure 2 and 3) performed at the same distance as the slots 24.

In the process of working with the deep sampler use the mechanisms of control valves (Fig. not shown).

Deep sampler works as follows:

Before descending "deep sampler in the well for sampling depth sample fluid it equip mechanisms control valve (MUK), for this sbencivu head 16 and tip 17 in figure 1, these places we have identified POS. When the screw mechanism control valves (MUK) in the upper part of the sampler POS pusher MUK (Fig. not showing the but) acts on the rod 12 and opens the valve 15 of the sampler. In the same way, when the screw MUK (Fig. not shown), the plunger MUK (Fig. not shown) acts on the rod 5 and opens the valve 8 of the sampler. Then the sampler with open valves 8 and 15 down into the well. The sampler at this moment works as a running. At a given point sampling depth of the sample in the well trimmed and bagged pins ANGUISH and the plunger MUK (Fig. not shown) moves up in the glass (Fig. not shown). The valves 8 and 15 under the action of pressure in the well is closed and the springs 7 and 13 of the sampler firmly hold the valves sampler 8 and 15 in the closed state. The sampler with the selected breakdown extracted from wells. After lifting the deep sampler to the surface Unscrew the ring mechanisms control valve of the sampler in the upper and lower parts (see POS figure 1), then Unscrew too restrictive nut 9 and in its place screw up the cover (Fig. not shown) to prevent the opening of the valve and hit the buffer fluid in the receiving chamber 1 of the sampler in the translation process of the deep samples in research equipment. Next at the top and bottom of the sampler screw head with valves for translation samples (Fig. not shown) in the research instrument. On the sampler wear thermostatic shirt, connect with those whom moschatum and pressure (Fig. not shown). Then create the pressure and temperature of the sampling point depth of the sample in the well and by swinging the sampler mixing device 19 is moved in the chamber 1 of the sampler and the sample of oil passing through the hole 22 of the mixing device, is mixed in the chamber 1. Then head for translation samples (Fig. not shown) of the buffer fluid creates pressure on the flap (Fig. not shown)installed instead of the restrictive nuts 9. The cap testing pressure buffer fluid moves the piston 2 with the valves 8 up and displaces selected a sample of oil, which, passing through the hole 22 of the mixing device 19, and mixed perelavlivaet through the press and the buffer fluid in the research instrument (Fig. not shown).

1. Deep sampler that includes receiving chamber, the upper and lower valves, piston, seal assemblies, valve stems to hold the sample in the sampler, the locking mechanism, the upper head and the lower tip with a hole for passage of a fluid, characterized in that deep sampler equipped with a mixing device located in the inlet chamber between the upper and lower valves, and the piston is made in the form of a cylindrical body with an axial groove in which is placed modplugin the config valve, as the piston in the lower part of the holding and restrictive nuts, with deep sampler made with the possibility of its connection with the control mechanism of the valves, as in the lower and in the upper part of the sampler.

2. Deep sampler according to claim 1, characterized in that the mixing device is made in the form of a sleeve, the mating parts which the diameter of the holes, and made a hole in the Central part, while on the outer side of the sleeve at the same distance from each other made the slits.



 

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2 cl, 1 dwg

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