SU442291A1 - A device for determining the location of the coupling joints of a pipe string in a well - Google Patents

Description

one

This invention relates to well testing devices.

A device is known for determining the location of the coupling joints of a pipe string in a well, including a housing, spring-loaded latches, and a mechanism for controlling latches.

The disadvantages of the known device are the impossibility of determining the locations of several joints of the casing string, the need for additional calculations, as well as its low reliability in operation, which reduces the efficiency of the device.

The proposed device differs from the known one in that the latch control mechanism is made in a vvde mounted on the body of a spring-loaded cylinder rigidly connected to the lock and provided with a pin interacting with the (| play groove made on the surface of the body. This increases

the effectiveness of the device. Figd depicts the proposed device; figure 2 - scan shaped slot housing; the position of the pin, in which the latch flush on the outer surface of the housing; Fig. 3 is the same, the position of the pin, in which the latches are released from the impact of the lock.

The device includes a housing I, to which an anvil 2 is attached. In the grooves of an anvil 2, spring 4 with rests 5, spring-loaded with the help of a spring 3, are installed. using

the springs 7 of the cylinder 8 with a coupling 9, connected to the latch, which interacts with its latches on its outer surface. Pin 9 interacts with the shaped groove

III, adpolished on the outside over

The bones of the housing I, and the cylinder 8, form with the latter a cavity 12 communicated with the central channel by an opening 13. In the central channel of the housing 1 there is a seat 14 for seating the valve 15.

The device works as follows.

A shank or packer 17 is attached to the lower end of housing I, and the assembly on the tubing string 18 is lowered into the well. recessed into the housing I. When the depth is reached, for example, when the packer 17 is installed in the skP, the valve 15, which sits in the saddle 14, is dropped into the pump-compressor column 18, closing the central channel. In the column 18, an overpressure of the fluid is created, which through the opening 13 penetrates into the cavity 12. The force generated by the pressure, overcoming the force of the spring 7, moves CYLINED 8 with the latch 10 and pin 9 upwards. At the same time, the pin end from position A goes to position B. After that, the pressure in the column of pump-compression pipes 18 is released, and the cylinder 8 with the xator 10 by pin 9 is moved down by the force of the spring 7. The end of the pin 9 occupies the position B 2, in which the latches 4 are free from the action of the latch 10, since after the last it is kept from further moving down by the pin 9, which occupies the position B2 in slot II of body I:. In this case, the latches 4 under the action of the force of the springs 3, turning on axles 6, are pressed against the inner surface of the casing column, i.e. tapwinter occupies the working position. Then the column is raised. In this case, the stops 5 of the latches 4, having met the joint, enter the gap 19 in the direction of the garden pipes 20 and abut the end of the upper pipe. According to the weight indicator, the interaction of the stops 5 of the latches 4 with the junction of the casing string 20 and the locations of the latter is judged. To determine the location of the underlying joint of the casing 20, tubing 18 is lowered to the appropriate depth.

To return the device from its working position to the static one for the purpose of determining the location of the overlying STYEOV of the casing 20 or retrieving it to the surface) in the tubing string 18 again create an overpressure followed by dropping it. as a result, the end of the pin 5 takes the AZ position (passes the VZG-B-A path), and the locking mechanism of the control mechanism under the action of the force of the spring 7 rotates the latches 4, having drowned the latter inside the housing.

INVENTIONS

A device for determining the location of coupling joints of a tubing string in a well, including a housing, spring-loaded latches and a control mechanism; with a lock and fitted with a pin, which cooperates with a shaped groove, is made on the surface of the housing.