SU823564A1 - Device for measuring well inclination angle - Google Patents

Description

(54) DEVICE FOR MEASURING AN HOLE TILT ANGLE

one

The invention relates to the drilling of oil and gas wells, and is related to devices for measuring the angles of inclination of boreholes with non-electromagnetic devices.

Devices are known in which the angle of inclination of the well is determined by the position of the ball fixed between the spherical surfaces of the spring-loaded piston and the cap 1

This device is installed in the drill pipe for all the slotting, and the amount of curvature is determined only after the slotting and lifting of the bit. When drilling on a chisel for several tens of meters, it is necessary to make bowls, e, in order not to gain greater curvature.

The tilt angle can only be observed visually before disassembling the device. After disassembly, this angle is not fixed by anything, whereas each curvature measurement should be documented.

It is also known a device comprising a housing in which a plumb with a piercer is mounted on a hinge, a cassette with a register, and a tape reciprocating to it, transmitted by a spring-loaded piston when the pumps are switched off. Each upward movement causes the perforation of the tape to be punched. The position of the hole formed by the punch indicates the angle of inclination. The measuring part of the device is filled with oil 2.

The drawbacks of the device are the difficulty of consuming, especially the tape mechanism, that it is installed in the drill pipe, the circulation of the drilling fluid goes through it, creating additional resistance. In addition, the device can be raised and lowered from the pipes only by using some kind of lifting mechanism.

The purpose of the invention is to improve the reliability of the device by simplifying 5 design.

The goal is achieved by the fact that in a known device for measuring the angle of inclination of a well, including a housing, a plumb with a needle, a measuring diagonal ;, and a separating spring-loaded piston forming a cavity with an oil with the housing, a plumb with a needle is mounted on a spring-loaded piston, and the diagram is fixed in the housing, and in the housing there is a channel blocked by a valve, indicating a cavity filled with oil, with a well space.

FIG. 1 shows the device in the charged state, a slit; in fig. 2 - the device at the time of measuring the angle of inclination.

In the housing 1 there is a spring-loaded piston 2 and a plumb 3 pivotally attached to it with a needle at the end. The slit 2 has a thread for assembly and an O-ring 4. To the case 1, a guide adapter 5 is fastened to the bottom, in which the sleeves 6 and 7 with end slots are located, between which the measuring diagram 8 is fixed, made of a material to be punctured (for example, paper, foil and etc.) and having concentric circles on its surface with a certain distance. between them.

A sleeve 9 is screwed into the adapter 5 from below, into which the hammer valve 10 is inserted. Between the inner surface of the sleeve 9 and the outer surface of the hammer valve 10 there is a calibrated gap covered by a rubber seal of the hammer valve. A washer 11 with internal slits restricts the movement of the shock valve 10 upwards. The adapter 12 is attached to the housing 1 from above with openings connecting the piston space with the external medium. For a more accurate measurement of the angle of inclination of the well, an extension 13 is attached to the device.

The device works as follows.

Charged device is thrown into drill pipes before lifting the bit. (If necessary, it can be lowered on the cable). The drilling fluid enters the piston space and equalizes the hydraulic pressure of the oil under pressure 2, eliminating some excess oil pressure due to the action of spring 14. When the device reaches the landing site, the hammer valve 10 rises up and opens the annular clearance for oil exit. Porschen 2 under the influence of the spring 14 moves down to the stop in the protrusion of the housing 1. If the device has a slope (bent hole), then a plumb 3, which occupies a vertical position, makes a needle puncture in the measuring diagram 8 on the circle corresponding to the angle of inclination of the device.

The economic effect of using the present invention is to reduce the cost of the device, eliminate the time and cost involved in eliminating complications and defects in work caused by the curvature of the wellbore.

In connection with the simplicity of manufacture and construction, each device can be equipped with a crew, as a result of which it is possible to increase control over the state of the well bore and prevent

his curvature. The lack of proper control in a number of cases leads to a sharp curvature of the barrel, which necessitates corrective work by re-drilling the well. A large amount of time and money is spent on correctional labor.

The annual economic effect only from preventing curvature is more than 180 thousand rubles.

Claims (2)

Invention Formula A device for measuring the angle of inclination of a well, comprising a housing, a plumb line with a needle, a measuring diagram and a separating spring loaded formation of a cavity filled with oil with the housing, characterized in that, in order to increase the reliability of the device by simplifying the design, the plumb line with the needle is mounted on the separating spring-loaded surface, and the measuring diagram is fixed in the housing, and in the housing there is a channel blocked by a valve, which communicates a cavity filled with oil, with a borehole space anism. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 638716, cl. 21 21 47/2, 1977. 5 2. US patent No. 3710448, cl. 33-306 1975. FIG. one ) Hchul at 15 Yu FIG. 2