SU1305303A1 - Rod-fishing tool - Google Patents

Abstract

The invention is intended for underground repair of oil wells and allows improving the reliability of the catcher operation. For this, it contains a hollow body (K) 1 with a sub 2 and an emphasis 3 in its upper part. The inner surface of K 1 in the lower part is made conical. Inside the K 1 is installed the pipe 4 with the upper 5 and lower 6 collet grips (C). Between the petals C 5, the ribs 7 are installed with a guide ring 8. When the catcher C 6 is in operation, reach the emergency rod coupling, together with the ring 8 and C 5 move up to the stop 3. Here the ring 8 limits the stroke of the socket 4 and prevents damage (L co o ate co

Description

C 5. At the same time, C 5 and 6 are unclenched and the coupling passes through them. After lifting the rods out of the well, the coupling rests on C 5 and puts C 6 into the cone K 1. The invention relates to the oil industry, in particular, tools for the underground repair of oil wells.

The purpose of the invention is to increase the reliability of the device operation.

The drawing shows the safety device, a general view.

 The sucker rod comprises a hollow body 1 with a sub 2 and an emphasis 3 in the upper part. The inner part of the housing I in the lower part is made conical. Inside the housing 1 there is a nozzle 4 with an upper 5 and lower 6 collet grips. Between the petals of the upper collet 5, ribs 7 are installed with a guide ring 8.

Shtangovy catcher works as follows.

The safety device is connected to the column rods using the sub 2 and lowered into the well to the accident site.

The collet grip 6, reaching the first coupling or the emergency boom head, together with the guide ring 8 and the upper collet grip 5, begin to move upwards to the stop 3, where the guide ring 8 limits the stroke of the collet 4 and prevents damage to the collet 5. At the same time the collet 5 and 6, the coupling or the boom head passes through them.

Editor N.Lazarenko

Compiled by V.Rodin

Tehred V. Kadar Corrector. Shekmar

Order 1393/27 Circulation 533. Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

By pressing the catcher upwards from the weight of the rod C 5 is unclenched. The clutch slips inside the nozzle 4 and is retained in C 6, 1, or 10 sludge.

When the rod string is being lifted from the well, the coupling or the emergency boom head abuts against the collet 5 and sets the collet 6 into the cone of the housing 1. Further movement of the catch upward from the weight of the emergency collet collet 5 opens and the coupling or the boom head slides inside the nozzle 4 and is delayed in the collet 6.

Thus, the forced fit of the collet into the body cone ensures reliable catch of the collars 1 of the emergency rod for lifting the latter out of the well.

Claims (1)

Formula from Gain A rod catcher containing a hollow body with a sub, an internal stop in the upper part, an inner conical surface in the lower part and installed inside the case with the possibility of limited axial movement of the nozzle with a collet grip in the lower part, characterized in that the device, the nozzle is provided with an additional collet gripper installed in its upper part and a guide ring with ribs, the latter being located between the petals of the collets additional gripping a.