RU85188U1 - DEVICE FOR LIFTING AND LIFTING OF GEOPHYSICAL INSTRUMENTS ON A CABLE UNDER A PRIMARY PUMP - Google Patents

Abstract

A device for lowering and lifting geophysical instruments on a cable under a production pump, in which the devices are suspended on a cable under a production pump, characterized in that a mechanism is fixed under the production pump, consisting of an electric motor connected on one side to the production pump and, on the other hand, to the drum with a cable wound thereon, and a chain hoist containing an upper block and a lower block having the possibility of lowering and lifting by means of a cable, while the devices are suspended on a cable under the lower block of the chain block.

Description

The utility model relates to the oil and gas industry and can be used for lowering and lifting geophysical instruments in hydrodynamic and geophysical studies.

A device for lowering and lifting instruments from vertical and deviated wells is known, comprising a logging winch with a cable, on which a string of geophysical instruments, protected from wear by friction against the borehole walls by safety adapters, is suspended (Patent RU No. 20057555, IPC 5 Е21В 47/00).

The disadvantage of this device is that after the descent of the production pump, it is impossible to perform geophysical surveys in the well due to the inability to lower the instruments below the pump, which has gaps with a column of only a few millimeters.

The closest analogue to the proposed device is a device for installing geophysical instruments in a well under a production pump (see Grachev Yu.V. et al. Automatic control in wells during drilling and operation. M: Nedra, 1986, p.286-310).

The prototype device allows downhole research only at a certain point in the reservoir interval, specified by the length of the cable on which the geophysical instruments are suspended. However, to control the production process, information is required on the dynamic state of the fluid and on well processes occurring at different depths.

The objective of the utility model is to create a device devoid of this drawback.

The technical result achieved by using the proposed technical solution is to conduct downhole research in a significant depth range to obtain information about real dynamic processes in the well.

The specified technical result is achieved by the fact that in the device for lowering and lifting geophysical instruments on the cable under the production pump, in which the devices are suspended on the cable under the production pump, according to the utility model, a mechanism is fixed under the production pump, consisting of an electric motor connected on one side to a production pump, and on the other hand to a drum with a cable wound thereon, and a tackle comprising a top block and a lower block having the possibility of lowering and lifting by means of a cable, while the devices are suspended on cable under the lower pulley block unit.

The fact that an electric motor is fixed under the extraction pump, which is connected on one side to the extraction pump and, on the other hand, to the drum with a cable wound around it, allows the drum to rotate, which translates into translational movement of the cable.

The fact that under the production pump a chain hoist is fixed, containing the upper block and the lower block, on which the devices are suspended on the cable, it allows to reduce the tension in the drum cable, since the mass of devices on the cable is distributed over several of its branches, to obtain a gain in force when lifting devices equal to the number of cables on which the lower pulley block hangs. Reducing the tension in turn allows you to reduce the diameter of the cable, the winch drum and blocks and get a more compact device as a whole.

The fact that the lower pulley block has the possibility of lowering and lifting by means of a cable allows you to lower the devices on the cable while lowering the lower pulley block under the influence of the weight of the devices, and to lift the devices while lifting the lower pulley block with a power consumption depending on the weight of the lifted devices. At the same time, downhole studies are carried out in a significant depth range with obtaining information about real dynamic processes in the well.

As you can see, the planned technical result is really achieved due to the proposed design of the device for lowering and lifting devices on the cable under the working mining pump.

The proposed device for lowering and lifting devices on a cable under a production pump is shown in the drawing, which shows a longitudinal section thereof.

The device comprises a production pump 1, under which a mechanism is fixed, consisting of an electric motor 2 and a chain block with the upper block 3 and the lower block 4. The electric motor 2 is connected to the production pump 1 through a power cable (not indicated by the position) and receives signals from the control panel located on surface, about changing the depth of research. On the same axis with the electric motor 2 there is a drum 5 with a wound cable 6. A cable 6 is wound with the other end onto the upper block 3 of the chain hoist through the capture of the lower block 4. Under the lower block 4 of the chain block, geophysical instruments 8 are suspended from the cable 7.

The device operates as follows.

Before lowering the production pump 1 into the well, a mechanism is fixed as part of an electric motor 2 designed to rotate the drum 5 with the cable 6 and the chain hoist with the upper 3 and lower 4 blocks. Devices 8 are fixed at the end of the cable 7 under the lower 4 pulley block.

In the production process, depending on the production tasks, the devices 8 are lowered or hoisted on cable 7 to a predetermined point in the formation interval as follows. From the control panel located on the surface, a signal is sent to change the depth of the research through the power cable to the electric motor 2. The electric motor 2 sets the direction of rotation of the drum 5, and by means of the cable 6 the lower unit 4 either launches or lifts the devices 8 in the well.

The descent of the devices 8 on the cable 7 is performed during the lowering of the lower 4 pulley block under the influence of the weight of the devices 8.

The lifting of the devices 8 on the cable 7 is performed during the lifting of the lower 4 pulley block with a power consumption depending on the weight of the lifted devices 8.

Claims (1)

A device for lowering and lifting geophysical instruments on a cable under a production pump, in which the devices are suspended on a cable under a production pump, characterized in that under the production pump there is a mechanism consisting of an electric motor connected on one side to the production pump and, on the other hand, to the drum with a cable wound on it, and a chain hoist containing the upper block and the lower block, which has the possibility of lowering and lifting by means of a cable, while the devices are suspended on a cable under the lower block of the chain block.