RU2677503C1 - Device for delivery of devices to horizontal well based on borehole torpedo - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas industry and can be applied for delivery to horizontal wells. Means of moving devices has the shape of a borehole torpedo, the body of which contains a chamber divided into hermetic compartments. Propellers are installed at opposite ends of the casing of the borehole torpedo, protected by a casing, each driven by its own electric motor through its own shaft. Cable passes through the equipment unit, in which the devices are placed, the drive hollow shaft of the rear electric motor to the front electric motor. Sealed compartments of the chamber are filled with liquid in the volume necessary to give the device a given buoyancy. Centralizers are installed on the means of moving devices.

EFFECT: technical result consists in increasing the speed and reliability of the delivery of devices to a horizontal well.

3 cl, 1 dwg

Description

The invention relates to the oil and gas industry, in particular, to devices for delivering devices to a horizontal well.

A device is known for delivering geophysical instruments to a horizontal well, comprising a geophysical cable and a delivery means made in the form of a casing, inside of which a hydraulic propeller is made, made in the form of two screws rotating in one direction, and a drive made in the form of an electric motor. The hydraulic drive is installed in the housing with a gap. SU 1208199 A1, publ. 01/30/1986.

The disadvantage of this device is the twisting of the geophysical cable due to the action of reactive torque on the device due to the fact that both screws rotate in the same direction.

The closest analogue of the proposed technical solution is a device for the delivery of geophysical instruments into the well, containing a geophysical cable and means for moving the geophysical instruments in the well, made in the form of a casing, inside which a hydraulic propeller is made in the form of two propellers connected to the drive, and the drive is made in the form of an electric motor with a transmission mechanism, for example a gearbox or a multiplier, is located in a geometric housing and placed in a casing with an annular the gap, and two propellers are made to rotate in opposite directions, located outside the housing and protected by a casing. RU 2363831 C1, publ. 08/10/2009.

The disadvantage of this invention is that the traction created by two screws located on the front end of the device and powered by one electric motor is not always sufficient for the movement of the "traction device - geophysical instruments" complex on the horizontal section of the well.

The technical problem to be solved by the claimed invention is directed is the development of a device for delivering devices to a horizontal well based on a borehole torpedo, which increases the actual thrust of the device.

The technical result from the implementation of the invention is to increase the speed and reliability of the delivery of devices in a horizontal well.

The specified technical result is achieved by the fact that in the device for delivering devices to a horizontal well, including a cable, a unit of equipment in which the devices are located, and a means of moving devices, inside a cylindrical sealed enclosure of which an electric motor is placed, and two propellers rotatably opposed the sides are located outside the housing and protected by a casing, according to the invention, the means for moving the devices has the form of a borehole torpedo, the housing of which contains py, broken into leakproof compartments, wherein propellers are mounted on opposite ends of a downhole torpedo hull, each driven by its own electric motor via its own shaft, and the cable passes through the equipment unit, and a drive motor a hollow shaft to the rear of the front motor.

These distinguishing features are significant.

The achievement of the technical result also contributes to the following.

The compartments of the chamber are filled with liquid in the amount necessary to give the device a given buoyancy.

Centralizers are installed on the instrument transfer device.

The equipment block has the shape of a cylinder.

In a borehole dashboard using a chamber consisting of sealed compartments that are filled with fluid, for example, drilling fluid, depending on the density of the medium in the borehole, the required buoyancy is provided, and the borehole torpedo itself contains two propulsors located at its opposite ends. Each propeller is a propeller connected to a direct-drive electric motor. Electric motors are connected to the ground control point of the cable. The propellers rotate in opposite directions to compensate for the torque acting on the borehole torpedo body. The front screw is a pulling and protected by a casing that does not allow large particles of rock to fall on the screw and jam it. The rear screw is pushing and is also protected by a casing. The cable passes through the equipment unit and the drive hollow shaft of the rear motor to the front motor.

In FIG. a diagram of the proposed device illustrates the essence of the invention.

The means for moving devices in the form of a borehole torpedo contains a chamber 1, consisting of sealed compartments that are filled with fluid, for example, drilling fluid, depending on the density of the medium in the borehole 2, providing the required buoyancy. The propellers 3 and 4 are connected to electric motors 5 and 6, the shaft 7 and the hollow shaft 8, providing direct transmission, located at opposite ends of the borehole torpedo. A cable 10 passes through the hollow shaft 8, which also passes through the rear screw 4 and the hollow rotor of the electric motor 6. The motors are controlled from a ground control station 9, for example, from frequency converters connected by a cable 10.

Delivery to the horizontal well of devices located in the unit of equipment 11 using this delivery vehicle is as follows.

A downhole torpedo connected through a cable 10 passing through a unit of equipment 11, a drive hollow shaft of the rear electric motor to the front electric motor, is lowered into the well. When the borehole torpedo reaches the horizontal section of the borehole, from the control point 9, electric motors 5 and 6 are turned on, which drive the propellers 3 and 4, which create, respectively, pulling and pushing forces applied to the body 12 of the borehole torpedo. The propellers rotate in opposite directions to compensate for the torque acting on the housing 12 of the downhole torpedo. In this case, the front screw 3 is a pulling and protected by a casing 13, which does not allow large particles to fall on the screw and jam it. The rear screw 4 is pushing and is also protected by a casing 14. The downhole torpedo is equipped with centralizers 15.

Raising a borehole torpedo with devices can be carried out by pulling with cable 10, and with a large weight, propellers 3 and 4 operating in reverse mode can be used.

An increase in the delivery speed is ensured by controlling the buoyancy of the borehole torpedo together with the devices and is realized by filling the sealed chamber compartments with a liquid, for example, drilling mud, depending on the density of the medium in the well. The increase in traction of the torpedo is ensured by the separation of two propellers, each driven by its own electric motor.

Improving the reliability of delivering devices to a horizontal well is ensured both by using direct transmissions from electric motors to propellers, and by increasing traction, which allows you to overcome complex sections of the well with a given set of devices.

Claims (3)

1. A device for delivering devices to a horizontal well, including a cable, a unit of equipment in which the devices are located, and a device moving device, inside the sealed enclosure of which an electric motor is placed, two propellers with the possibility of rotation in opposite directions, located outside the case and protected casing, characterized in that the means of moving the devices has the form of a borehole torpedo, the body of which contains a camera, broken into airtight compartments, and the propellers The s at the opposite ends of the borehole torpedo housing are each driven by their own electric motor through their own shaft, and the cable passes through the equipment unit and the drive hollow shaft of the rear electric motor to the front electric motor. 2. The device according to claim 1, characterized in that the sealed compartments of the chamber are filled with liquid in the amount necessary to give the device a given buoyancy. 3. The device according to claim 1, characterized in that centralizers are installed on the means for moving the devices.

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