SU1728484A1 - Device for determination of borehole zenith angle - Google Patents

Abstract

Usage: measurement of parameters of the curvature of exploration wells. SUMMARY OF THE INVENTION: The device consists of a housing 1 with holes 2 and 3 for the passage of washing liquid, a pilot 4 on a flexible suspension 5, which is fixed on the bowl 6. The holder 4 is provided with a stopper assembly consisting of a rod 7, a valve 8, a spring 9, a stopper 10. In the housing 1, a chamber 11 for distributing a flow of washing liquid with openings 14, 15, 16 is fixed to allow passage of the washing liquid. Under the chamber 11, a hydraulic turbine 18 is installed with a spool 19 and grooves 20. The hydraulic turbine 18 is kinematically connected to a cylindrical body 24, in which channels 25 and 26 are provided for the passage of washing liquid. 2 з, п.ф-л, 4 Il.

Description

The invention relates to geophysical downhole tools for measuring the parameters of a curvature of exploration wells.

A device for measuring the zenith angle of a well is known, comprising a housing with a lid, a spring-loaded stem with an annular locking groove, a plumb with a needle at the end, a measuring diagram, cylindrical locking elements and a locking sleeve.

The closest in technical essence of the present invention is a borehole annunciator, comprising a housing, a movable rod, a valve, a sleeve with stepped annular projections, an oil chamber, a compensator, a turbine, a casing with a side window, and a spool.

The disadvantage of these inventions is the impossibility of performing multiple measurements without carrying out lifting and lifting operations.

The purpose of the invention is to reuse the device without tripping.

This is achieved by the fact that the device is equipped with a flushing fluid distribution chamber rigidly mounted in the housing, provided with openings in a spherical bottom and a lid for passing the flushing fluid and located on the wafer along its axis inside the flushing fluid flow distribution chamber rod with a spring-loaded valve and a locking element, the spring-loaded valve is attached to the master with

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the possibility of blocking, when the rotor moves, the holes in the bottom of the chamber for the distribution of the flow of washing liquid.

FIG. 1 shows a device for determining the zenith angle of a well at a deviation angle from the vertical; in fig. 2 is a section along A-A in FIG. one; in fig. 3 is a section along BB in FIG. one; in fig. 4 - hydraulic turbine, top view.

A device for determining the zenith angle of a well consists of a housing 1 with holes 2 and 3 for the passage of flushing fluid, a pilot 4 on a flexible suspension 5 which is fixed to the bowl 6. The cylinder 4 is equipped with a stopper assembly consisting of a rod 7, a valve 8 spring 9, stopper 10. The housing 11 of the device 1 is rigidly fixed to the chamber 11 for distributing the flushing fluid flow, which is cylindrical with a spherical bottom 12 and a lid 13, which have openings for passage of the flushing fluid 14, 15, 16. Under the chamber 11 on the bearing 17 is installed hydra Foliage turbine 18 with spool 19 and grooves 20. Bearing 17 is mounted on barrel 21, which has channels for flushing fluid 22, 23. The barrel is rigidly fixed in a cylindrical body 24 connected by a threaded connection to the device body. In the cylindrical body 24, channels for flushing fluid are made: axial 25 and inclined 26. The axial channel is blocked by a plug 27. A ring 28 is rigidly fixed below the holes 3 on the device body 1.

In the process of drilling a well, a device for determining the zenith angle of a well is above the rock-destruction tool during coreless drilling. or over the core set during core drilling.

FIG. 1 shows the use of the device in a double-core de.

A device for determining the zenith angle of the well works as follows. To measure the zenith angle of the well, stop the rotation of the drill string and turn off the mud pump. In this case, the tandem 4, having a flexible suspension 5, together with the locking assembly, takes up a vertical position. In this case, the valve 8 of the stop assembly opens the hole 14 in proportion to the angle p of the deviation of the axis of the tandem from the axis of the device. A mud pump is also included with a fixed flush flow rate required for the measurement. The flow of flushing fluid, the passage in the annular space (between the drill pipe 29 and the device body 1), is divided into two parts: the first enters the spool chamber 30 through the holes 3 in the device body, the second enters

the spool chamber 30 through the holes 2 in the device case, the axial hole 14 in the bottom 12 of the chamber for distributing the flow of washing liquid, the holes 16 in the chamber lid 13, the slots 20 of the turbine 18 (the turbine under

the action of the washing liquid is rotated). From the spool chamber 29, the flow of flushing fluid through the channels 22,23,24,25 flows into the annular space and is fed to the rock-breaking tool.

When passing through the hole 1.4, the flushing fluid presses on the valve 8, as a result of which the stopper 10 fixes the fixed masterpiece. Thus, the size of the hole 14 formed by the valve 8 is proportional to the angle of curvature of the well (zenith angle). During the rotation of the hydraulic turbine 18, the spool 19 periodically closes the channels 22 of the barrel 21, which creates hydraulic impulses in the washing liquid column, the frequency of which is proportional to the flow rate of the washing liquid passing to the hydraulic

turbine through hole 14.

Hydraulic pulses are recorded and processed on the surface with special equipment that determines the value of the zenith angle of the well at the moment of

In the vertical position of the device (angle Ю), the opening 14 is completely blocked by the valve 8. In this case, the washing liquid passes through the opening 15, and the main part passes through the opening 3.

Thus, the proposed device makes it possible to perform multiple measurements of the zenith angles of a well during its drilling without carrying out down-lifting operations, which makes it possible to increase the efficiency of measurements and obtain an economic effect by reducing the costs of tripping and using special technical means. measurements (logging stations).

Claims (3)

Claim 1. Device for determining the zenith angle of a well, comprising a housing, a hydraulic turbine installed in it spool and master, characterized in that, for the purpose of repeated use without carrying out lifting and lifting operations, it is equipped with a chamber for distributing the flow of washing fluid, made cylindrical with holes in the bottom and the lid for passing the washing fluid and located on the tiller along its axis inside the chamber of distribution of the flow of the washing liquid with a stop assembly made in the form of a rod with a spring-loaded valve and a stop element, the spring-loaded valve being fixed flax on the tiller with the possibility of blocking the trough hole in the bottom 0 chambers distribution flow of washing liquid. 2. The device according to claim 1, wherein the bottom and lid of the chamber for distribution of the washing liquid flow are made spherical. 3. The device according to claim 1, that is, so that the locking element is designed as a hollow cylinder, and the valve is designed as a bowl with a spherical surface. FIG. one Fig.Z PhieA