SU33938A1 - Connector Coupling Switch for Casing - Google Patents

Description

To connect and disconnect the casing, in order to leave only the pipes in contact with the walls of the borehole in the well, a coupling sleeve is proposed, in which on the lower part of the pipe there are protrusions that fit into the corresponding bayonet cut-out in the pipe sleeve.

In FIG. 1 shows a bottom view of a switch insert; FIG. 2 - side view; FIG. 3 is a side view of the coupling; FIG. 4 shows a section along the line BC in FIG. 3; FIG. 5 shows a section along the line DE in FIG. 3; FIG. b - section along the line AB in FIG. 2; FIG. 7 is a sectional view of the coupling along line AB in FIG. 3; FIG. 8 is the same incision with the replacement of resistant thresholds with resistant pins.

The proposed coupling coupling for casing consists of a liner / switch (Fig. 1, 2 and 6) and a switch coupling (Fig. 3-7). The insert / switch is provided with protrusions on the lower part of the pipe, which fit into the corresponding bayonet t-b in the pipe sleeve.

Having established exactly where the column is to be put the coupling, properly fix the pipe on which it is necessary to screw the coupling; then take a switch with switch and screw it on the end

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pipes with a thread intended to be connected at this place with a column, and this pipe, and the entire column above, can be of the same diameter as the lower part of the column and the smaller diameter of the latter. Screwing of both these parts and all pipes of the column must be performed to failure. Then they take the properly prepared one, i.e., a pipe lifted on the lifting cable and placed vertically on weight with a liner switch and slowly, like with ordinary screwing of the pipes, lowered into the sleeve k, directing the liner switch so that it protrusions a, a ... stand against and enter vertical slots b, b ... of a switching clutch against the stop into a horizontal ring threshold c, c ... Both the liner and all the slots of the clutch must be abundantly lubricated with some kind of thick grease (autolom or grease). Making sure that the hub with its protrusions a, a ... has become on the threshold c, c ..., turns the casing from the right to the left by a quarter turn, slides the crests of the threshold until they stop the first into the thrust pillars d, d or the thrust pins g , g. Then, using one or another drilling hoist, slightly raise the pipe with an insert on the cable, whereby the projections a,

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but. they will be lifted along the horizontal groove and with their teeth I will enter the brake sockets t (Fig. 3), which should be two or three mm wider than the teeth mentioned above and the purpose of which is only to prevent the coupling from turning on the breaker insert the time of lowering the lower part of the string into the well, as well as during the excavation of the mentioned part of the string during extraction operations of all the working columns of the pipe at the end of drilling. Making sure that the teeth / entered into the sockets t, and therefore that the upper edge of the protrusions about closely coincides with the upper edge of the horizontal grooves k, freeing the lower pipe from fastening, lower the string into the well in the usual way, increasing it as needed by the pipes. When the clutch reaches its designated place in the well, i.e., to a depth of about 45 meters from the surface, the further landing of the column stops. Then, without waiting for the coupling to be inserted into this column, the second column is turned on and the entire part of it above the coupling is removed from the well together with the switch insert, leaving the coupling in the well.

To do this, turn this column on / 4 turns from left to right along the horizontal groove k to the stop protrusions a, and into stopgaps d or pins g (Fig. 7 and 8), gradually drawing it up with a lifting cable upwards, whereby the protrusions a, a the liner / switch /, when turned, rotates the position against the vertical slots b, b ..., will come out of the switch coupling n, which will immediately make you feel completely free of rotation of the column, which is removed from the well in the usual way, etc.

The subject matter of the invention.

A connecting sleeve-switch for casing, characterized in that to connect and disconnect pipes in order to leave only wells that are directly in contact with the walls of the well, there is a connection consisting of protrusions and on the lower part of the pipe cutout t-o in pipe coupling.