SU1470948A1 - Formation tester - Google Patents

Abstract

The invention relates to well logs and is intended for sampling of fluid and gas from a formation. The goal is to increase the reliability of the sealing of the inflow hole when examining wells of various diameters. The tester includes a housing 1, a sealing shoe, made in the form of an elastic sheath 4 with a liquid, having a passageway. The latter informs the inlet hole of the well with the sampling unit 5. In the flow channel there is an insert made composite in the form of a fixed sleeve 6 fixed to the housing 1 with a removable conical tip 7 and a movable sleeve 8. It is fixed on the shell 4 and is put on the sleeve 6. The tester has a clamping system with drive 2, compensator with spring-loaded spring 10 piston 9. The cavity of the shell communicates with the external environment through the compensator. The casing 4 together with the bushing 8 displaces a certain volume of fluid from the cavity under the piston 9 and receives the curvature of the well, flowing into small cavities and skirting irregularities. The tip 7 on the sleeve 6 is inserted into the crust, destroying it. 2 Il.

Description

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The invention relates to well logging, in particular to devices for sampling fluid and gas from a formation.

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The purpose of the invention is to improve the reliability of sealing the inflow hole when examining wells of various diameters.

Figure 1 shows the reservoir tester in the initial position, common B; e} in Figure 2 is part of the tester with a liner when taking a sample from the borehole wall,

; The reservoir tester contains icopnyc 1 (fig.), Electric drive 2, clamping lever with piston 3, sealing baaimak, made in the form of an elastic shell 4 with a cavity,

1470948.2

This elastic sheath 4 together with the movable sleeve 8 displaces a certain volume of fluid from the cavity under the separating piston 9 and accepts the curvature of the well, flowing into small cavities and curvature irregularities, and pressing the entire contact area evenly, all directions are the same. The conical nut 7 on the cylindrical sleeve 6 is inserted into the mud cake, destroying it. When working in solid and cemented collectors, the removable conical tip 7 is removed and work is carried out without it. At the end of the sealing valve 11 is activated and occurs

15

A, filled with a liquid. In a gertizis-, 20, the filling of the sampler with a reservoir shoe, a passage channel is formed with an input telling the inflow-. there is a hole with a sampling box 5. The insert is made in the form of a fixed 25 sleeve 6 fixed to the case with a removable conical tip NICK 7 and a movable sleeve 8 fixed on the elastic shell 4 and put on the stationary sleeve 6. | The reservoir tester is also provided with a 30 compensator with a piston 9, a spring loaded 10 relative to the housing 1, and equipped with a valve 1, which communicates the bore of the shoe with the sampler 5. The cavity is elastic. 35 shell communicated with the external environment through the compensator. The presence of the latter is due to the need for a part of the fluid to flow from cavity A when sealing the test area 40 to ensure that the conical tip 7 is inserted into the mudcake in order to destroy it,

The tester works in the following 45 ways.

Upon reaching the test point, the electric drive 2 is turned on, and the clamping lever with the piston 3 deflects the tester to the wall of the skvlzkka. With

fluid. After filling the sampler, the drive reverses, all actuators return to their original position and the tester rises to the surface.

Claims (1)

The claims of the reservoir tester, comprising a housing that seals the shoe, with an I passage channel that communicates an exact hole of the well with a sampler, an insert located in: this channel, and a pressure driven system, characterized in that , in order to improve the reliability of sealing the supply hole when examining wells of various diameters, it is equipped with a compensator with a piston spring-loaded relative to the body, with the sealing shoe made in the form of an elastic shell filled with liquid, and The joint is made in the form of a fixed sleeve fixed to the body with a removable conical tip and a single sleeve fixed on the elastic shell and put on the fixed sleeve, while the cavity of the elastic shell is communicated by the external medium through the compensator. with ten , 70948.2 This elastic sheath 4 together with the movable sleeve 8 displaces a certain volume of fluid from cavity A under the separator piston 9 and accepts the curvature of the well, flows into small cavities and curvature irregularities, and pressing the entire contact area evenly, because the fluid has the ability to transmit pressure in all directions are the same. The conical nut 7 on the cylindrical sleeve 6 is inserted into the mud cake, destroying it. When working in solid and cemented collectors, the removable conical tip 7 is removed and work is carried out without it. At the end of the sealing valve 11 is activated and occurs 15 filling the sampler with reservoir lyuidom. After the sampler is filled, the drive reverses, all of the executive elements are returned to their original position and the tester rises to the surface. The claims of the reservoir tester, comprising a housing, sealing the shoe, with a passage channel that communicates the inflow hole of the well with a sampling hole, an insert located in this channel, and a pressure system with a drive, characterized in that To increase the reliable sealing of the inflow hole when examining wells of various diameters, it is equipped with a compensator with a piston spring-loaded relative to the body, and the sealing shoe is made in the form of an elastic shell filled with liquid, and adsh vsholnen compound as a sleeve mounted on the fixed casing with a removable tapered tip and rootstock xoy sleeve fixed on an elastic sheath fitted on and fixed a sleeve, wherein the elastic shell cavity communicates with the outside through the compensator.