RU52903U1 - DEVICE FOR INPUT OF THE DEVICE ON A CABLE IN A WELL - Google Patents

Abstract

The utility model relates to the oil and gas industry and can be used to remove hydrate-paraffin formations by a heating device on the cable. It is possible to introduce devices into the annulus of wells equipped with sucker rod pumps and without holes in the flanges intended for input devices. The device contains a lubricator with an oil seal installed on the hole in the column at the wellhead, while the lubricator is mounted on the end face of the valve hole, the installation angle of the lubricator is selected from the condition of the device entering the well with the contact of the device body against the edge of the valve hole, and the length of the device is selected from conditions not exceeding the distance between the end face of the valve hole and the inner surface of the column along the axis of the device installed at the selected angle.

Description

The utility model relates to the oil and gas industry and can be used to remove hydrate-paraffin formations by a heating device on the cable.

There are various devices for introducing a device on a cable into a well when removing hydrate-paraffin formations, the most used of which is a lubricator with an oil seal (A.G. Molchanov, V.L. Chicherov. Oilfield machines and mechanisms. Second edition. M .: Nedra , 1983, - p. 161, fig. II.32; S. S. Intenberg., TD Dakhkilgov. Geophysical surveys in wells. M: Nedra, 1982, - p. 286-288, fig. 170) .

A disadvantage of the known devices is that they can only be used in wells with an electric centrifugal pump located in them, which allows the introduction of devices on the cable into the tubing. In this case, the heating device removes hydrate-paraffin formations both in the tubing and behind it in the annulus after sufficient heating in the pipe.

However, in wells with a sucker rod pump, there are rods in the tubing that do not allow devices to be lowered into these pipes. There is a need to lower the heating device in the annulus to remove hydrate-paraffin formations both in the annulus and through it and in the pipe.

But the known devices do not allow the introduction of devices on the cable into the annulus.

To eliminate this drawback allows the device, taken as a prototype. A device for introducing a device on a cable into a well according to the prototype comprises a lubricator with an oil seal mounted on an opening in the column at the wellhead (patent No. 39162, MHK ⁷ E 21 B 19/00, 03.03.2004, Bull. No. 20, 20.06.2004) . As a hole for installing the lubricator use a pre-inclined hole in the flange of the fountain valves at the wellhead. Devices are introduced into this hole in the annulus of wells with sucker rod pumps.

However, only 50% of the flanges in the wells are equipped with these holes. In the second half of the wells, on which there are no holes in the flanges, there is no possibility to introduce devices into the pipe or in the annulus.

The objective of the proposed utility model is to eliminate this drawback.

The technical result achieved by using the proposed utility model is the ability to introduce devices into the annulus of wells equipped with sucker rod pumps and having no holes in the flanges for inputting the devices.

The specified technical result is achieved by the fact that in the device for introducing the device on the cable into the well, containing a lubricator with an oil seal installed on the hole in the column at the wellhead, according to the utility model, the lubricator is installed on the end of the valve hole, the installation angle of the lubricator is selected from the input condition the device into the well with the contact of the device body about the edge of the valve hole, and the length of the device is selected so that the distance between the end of the valve hole and the inner surface of the column does not exceed axis of the instrument set at a selected angle.

Installing the lubricator on the end of the hole for the valve allows you to use this hole to enter the device on the cable, and the question of entering the device into the annulus of the well is successfully resolved. In this case, the valve must be removed, and the hole must be released for the installation of the lubricator.

The choice of the angle of installation of the lubricator from the condition of the device’s entry into the well with the contact of the device’s body about the edge of the valve hole allows the body to slide along the inner surface of the column and turn around the point of contact of the device with the hole’s edge, as a result of which the device is deployed parallel to the well axis and goes to the specified depth together with the descent cable,

The choice of the length of the device from the condition that the distance between the end of the hole for the valve and the inner surface of the column along the axis of the device, set at a selected angle, does not allow the device to turn around its point of contact with the edge of the hole and not to catch the edge of the hole in its opposite upper part, which prevented would turn the device and enter it into the well.

So, the device freely enters the well to a predetermined depth and also freely exits the well at the mouth along the descent path, but in the opposite direction.

As you can see, the planned technical result is successfully achieved.

A longitudinal section of the proposed device is shown in the attached drawing.

The device contains a lubricator 1 with an oil seal 2 mounted on the wellhead at the hole 3 for the valve. The angle α of the installation of the lubricator 1 is selected from the condition of entry of the device 4 into the well with the contact of the body of the device 4 about the edge 5 of the hole 3 for the valve. The length of the device 4 is selected so as not to exceed the distance between the end face 6

holes 3 for the valve and the inner surface of the column 7 along the axis 8 of the device 4, installed at a selected angle α.

The device operates as follows.

From the end 6 of the hole 3 remove the valve (not shown) and install on the end 6 the lubricator 1, located at the calculated angle α. Having removed the stuffing box 2, through the opening for the stuffing box 2 they lead into the hole 3 until the contact with the edge 5 and the inner surface 7 of the column device 4, mounted on the cable. The cut gland 2 is fixed in its place. After this, the cable begins to flow into the well. The cable pushes the device 4, which begins to slide down the inner surface 7 of the column and simultaneously rotate around the contact edge 5. The selected length of the device 4 allows the device 4 to turn around the edge 5 and not touch the edge of the hole 3 in the opposite edge 5 of the upper part of the hole 3. Device 4 freely rotates to a position when it is parallel to the axis of the well, which allows the device to achieve a given depth.

After completion of work, the device 4 is removed in the reverse order, removing the cable on which the device 4 is placed.

After finishing work, remove the lubricator 1 from the end face 6 of the hole 3 and put the valve on the end face 6.

The well is ready for oil production.

Thus, the planned technical result is successfully achieved.

Claims (1)

A device for introducing a device on a cable into a well containing a lubricator with an oil seal mounted on an opening in the column at the wellhead, characterized in that the lubricator is installed on the end of the valve hole, the installation angle of the lubricator is selected from the condition of the device entering the well with the contact of the device body about the edge of the hole for the valve, and the length of the device is selected so as not to exceed the distance between the end of the hole for the valve and the inner surface of the column along the axis of the device installed at a selected angle.