SU1023075A1 - Sampler for formation tester - Google Patents

Abstract

PLASTIC EXAMINER SAMPLIFIER, including Khuraus, sampling chambers, and a stock that is located inside them, is equipped with (with a piston, installed on the safety circuit, in a dog with a reciprocating piston, and in order to hide a cam {nd on the Azovan ло and an odd piston; Narunn Ya1 poverHyost. f (f, which performed Yeni grooves, interacting with the dog, located in the housing.

Description

iNd

OQ O JV The invention relates to the mining industry, namely, devices for taking sealed samples of a reservoir when testing oil and gas wells. A well-known sampler LH is used in ppastov, consisting of a casing, inside of which is located a container with shut-off valves and a device for directing the flow of formation fluid. The container is made in the vice sections, communicating with each other to the internal cavity of the housing, and the device for directing the flow of reservoir fluid is made in the form of a sleeve with radial openings hydraulically connected with OTBBpUnnMJVlW, and nu, D .-- with a circulation valve t1 The disadvantage of such a sampler is that the closing of the valves and the sealing of the sampled sample is carried out by overpressure on the piston of the circulation valve. The high performance of the valves reflects on the quality of the sampled sample. Also, the shortage of these samplers includes the possibility of taking no more than one well into one well; one sample. Also known yrobotbornik flow type to | plastic tester, including body, sampling chamber and concentrically placed stem. This sampler has several hermetically closed flow sections 2. The disadvantage of this sampling is the impossibility of multiple samples at different fixed points in the flow time of the fluid from the reservoir, since its design provides only simultaneous sampling in all sections of the sampling station. A sampler for a reservoir tester is also known, which includes a body with sampling chambers with inlet orifices and a rod concentrically located with chambers, with inlet bushings overlapping with the inlet ports of the sampling chambers concentrically with it. Each inlet sleeve is secured with a shear element in the housing and has a retainer that secures the inner sleeve to the rod after cutting the sample into the appropriate sampling chamber .Sj. The disadvantages of this sampling are the complexity of its design and the reliability of ball locking devices, as well as the need to select the appropriate shear elements that, after they are cut, can jam the inlet sleeves, all this reduces the reliability of sampling when testing formations at different intervals. The circuit of the invention is to increase the reliability of sampling. This goal is achieved by the fact that the apr (b) is equipped with a system of pistons mounted on the rod, a nut and a dog with a spring-loaded piston, and the sampling chambers are formed by a sleeve and a system of massages, the upper piston having a brake ring and located in a sleeve mounted concentrically in the housing with the possibility of axial movement, on the outer surface of which the grooves are made interacting with the pawl located in the housing. FIG. 1 Poi: azan sampler, incision; in fig. 2 — node I in FIG. 1. (an example of a dog built into the body of the sampler). The sampler consists of the upper part 1 and the lower part 2, rigidly interconnected, in the upper part of the body there is an epiploon 3, through which the bar 4 with the coupling 5 passes. The bar is connected to the body 1 through the connector 6, the rod 7 is rigidly connected on which there are pistons 8 about seals 9 and valve devices 10. Pistons 8 are interconnected by intermediate rods 11, inside the housing. there is a chamber 12, which is mounted on the rod 7 due to the force tr & the brake ring 13 of the piston 14, located inside the chamber 12. In the wall of the housing 2 is mounted a retainer 15 consisting of a sleeve 16, a piston 17, a spring 18 and a pawl 19, which interacts with an I2O ring bushing on the outer surface of the camera 12, npo6ooT6qf the upper sleeve 5 is connected to the test system of the test paste, and the tweezers 21 to the packer. The sampler works as follows. After descending a kit of a test kit with a sampler to the bottom of a borehole when transferring compressive loads to the packer to the pressurized area of the pallet area, simultaneously the rod 4 moves inside the housing 1- until the end face of the coupling 5 is in the housing. The rod 7, pistons 8 and 14 and chamber 12 are moved to the same distance. After

open the inlet section of the formations inside the kefpus, the hydraulic pressure gauge © is reduced. The piston 17, under the action of a high gyrostatic opening in the well, takes place inside the housing, a spring 18, and the dog 19 enters the exit plate 20 of chamber 12, thereby fixing it. Fluid from the reservoir passes through.

cortus 1 and 2 up into the drain pipe. After closing the valve, the tester for converting the inflow to the extractor to restore the pump to tension the tool to remove the packer. At the same time, the rod 4, connected with the tester's nodes, goes upwards with respect to Kqpnyca, all the pistons 8 move along with it, ja chamber 12 remains stationary, held by the dog 19. In rezush: one piston enters inside the displacement chamber and meats the pores { I sew about. would be fluid. This moment fixes on the letterhead of the depth gauge, since the departure of the equalizer valve from the test station, which occurs after the test sample, results in pressure leveling inside the housing with the wellbore. The spring 18 retracts the piston 1 back to the down position.

When creating a new sample of the same stratum or a new one, the next piston is mixed into the chamber and hermetically sealed with the new piston 1foba, which was received during the new test cycle. Hoa rod 4 provides for the introduction of a single piston into the chamber.

Thus, in each cycle, the sample is sealed with a sample.

In case of accidental compression and stretching of the sampling sampler, the sample does not: 1: Fowers, since to activate the fixture (parts 16, 17, 18 and 19), the packer must be sealed and the tester's inlet valve opened, i.e. conducting a cycle of exploration of the reservoir on the npj flow. After removing the chamber with the samples from the body for transferring the samples, valve devices U are used. As the sampler compartments empty, the released piston with the rod 11 is disconnected and the others are moved to the edge of the chamber to transfer the next sample.

The application of the proposed sampler allows to increase the reliability of sampling from several products & t objects in a single trip to the well, 2 J6

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Claims (1)

Sampler for a ¹ ”LAYER TEST, including a body, sampling chambers and a * * rod that is meticulously placed in them, repelled by the fact that, in order to increase the reliability of sampling, it is equipped with a piston system mounted * on the rod, a sleeve and a dog with a spring-loaded piston, and the sampling chambers are formed by a sleeve and a piston system, the upper piston having a brake ring and located in a sleeve mounted axially in a case with axial movement on the outer surface. . which made grooves interacting with a dog located in the housing. _m SU, „. 102307 SI> 1023075 2 corresponding shear · elements, which, after their cutting, can jam inlet sleeves, all this reduces the reliability of sampling when testing 5 layers at different intervals. The purpose of the invention is to increase the reliability of sampling. This goal is achieved by the fact that the sampler is equipped with a piston system, 10 mounted on the stem, a sleeve and a dog with a spring-loaded piston, and the sampling chambers are formed by a sleeve and a piston system, and the upper piston has a brake ring and is located in the sleeve installed15. foam foam concentrically in the housing with the possibility of axial movement ^ on the outer surface of which grooves are made, interacting with a dog located in the housing. In FIG. 1 shows a sampler, 20.