RU41488U1 - WELL MOUNT SEALER - Google Patents

Abstract

The utility model relates to equipment used in the underground repair of oil and gas wells, and is used to seal the wellhead during geophysical surveys with the help of downhole tools that are lowered into the well on a cable through a lubricator with excessive wellhead pressure in the well. The technical problem solved by the utility model is to seal the wellhead during geophysical surveys with the help of downhole tools, lowered into the well on a cable through a lubricator with excessive wellhead pressure in the well. The problem is solved in that the wellhead sealant containing a hollow cylindrical body with flanges and with a seating seat made in the form of either a cone or a combined surface of the cylinder with a cone, a replaceable sealing insert in contact with the landing seat is made so that the sealing insert has two channels connected to each other, longitudinal through and radial, each channel being equipped with a removable locking element, for example, a ball valve. The ability to seal the wellhead at the time of geophysical surveys with excessive wellhead pressure significantly expands the technological capabilities of the device as a whole.

Description

The utility model relates to equipment used in the underground repair of oil and gas wells, and is used to seal the wellhead during geophysical surveys with the help of downhole tools that are lowered into the well on a cable through a lubricator with excessive wellhead pressure in the well.

A device for sealing the wellhead, comprising a housing made in the form of a coil with flanges for connection with wellhead equipment, screw clamps for fixing the conical sleeve in the housing [1]. A disadvantage of the known device is the inability to seal the wellhead during geophysical surveys with the help of downhole tools, lowered into the well on a cable through a lubricator with excessive wellhead pressure in the well.

Known sealant wellhead containing a housing made in the form of a coil with flanges for connection with wellhead equipment, screw clamps for fixing a cylindrical coupling in the housing [2]. A disadvantage of the known device is the inability to seal the mouth during geophysical

research using deep instruments lowered into the well on a cable through a lubricator at overhead wellhead pressure in the well.

The technical problem solved by the utility model is to seal the wellhead during geophysical surveys with the help of downhole tools, lowered into the well on a cable through a lubricator with excessive wellhead pressure in the well.

The problem is solved in that the wellhead sealant containing a hollow cylindrical body with flanges and with a seating seat made in the form of either a cone or a combined surface of the cylinder with a cone, a replaceable sealing insert in contact with the landing seat is made so that the sealing insert has two channels connected to each other: longitudinal through and radial, while each of the channels is equipped with a removable locking element, for example, a ball valve.

The utility model is illustrated by drawings, which depict:

The figure 1 is a vertical section of the sealant before installing a removable sealing insert in the landing seat of the housing.

In figure 2 is a vertical section of the sealant at the time of installation of the replaceable sealing insert in the landing seat of the housing.

Figure 3 is a top view of A on the sealant.

In figure 4 is a section along BB of the sealant in the plane of the location of the clamps in their original position.

The sealant of the wellhead comprises a hollow cylindrical body 1 with a landing seat made, for example, in the form of a cone 2, a lower flange 3 for connecting to the reinforcement of the wellhead and an upper flange 4 for installing technological equipment, a replaceable sealing insert

5, which, in turn, contains a conical sleeve 6 with sealing elements 7 and connected by thread to the process pipes 8 (Fig. 1; 2). The conical sleeve 6 has two channels connected between each other: a longitudinal through 9 and a radial 10, while each of the channels is equipped with a removable locking element, for example, a ball valve 11 and 12. To fix the replaceable sealing insert 5, the housing 1 is equipped with latches made in the form of movable sliders 13 (figure 4).

The device operates as follows. Install a removable sealing insert 5 in the housing 1 and fix it with movable sliders 13 (figure 4). On the ball valve 11 install a lubricator with a geophysical instrument inside (not shown). The device is lowered into the well to a predetermined depth and research is carried out. If necessary, to create excess pressure in the well, the required amount of fluid is pumped through the ball valve 12 and further research work is carried out.

The ability to seal the wellhead at the time of geophysical surveys with excess wellhead pressure significantly expands the technological capabilities of the sealant as a whole.

Sources of information:

1.SU 1836541 A3, 09/17/1991

2. SU 861552 A3, 05/07/1979

Claims (1)

A wellhead sealant comprising a hollow cylindrical body with flanges and with a seating seat made in the form of either a cone or a combined surface of the cylinder with a cone, a replaceable sealing insert in contact with the landing seat, characterized in that the replaceable sealing insert has two communicated between a channel, longitudinal through and radial, while each of the channels is equipped with a removable locking element, for example, a ball valve.