SU1229308A1 - Hole-bottom anchor - Google Patents

Description

one

The invention relates to the fastening of injection wells for injection; hot agent in oil n, ttstay,

The purpose of the invention is to improve the reliability of the downhole core.

The drawing shows downhole measles, incision (transport position).

Downhole measles contains an upper sub 1 designed to be connected to the casing, the body 2 5 through which the finger 4 passes the longitudinal windows 3, which connects the sleeve 5 with the suspension 6, the sleeve 5 has a saddle for the throw ball, in the initial position of the window 3 to fastened inside it by a shear pin 7. On the case 2, the fastening unit is interoperable with the sleeve when it is moved, including: the articulated joint with the suspension 6 of the operating die 8, which are in state contact with the cone 9 , The fastener unit is mounted on the body with the possibility of limited axial movement relative to it due to the location between the cone 9 and the shoe 0 of the uprights 11, the lower end 5 in the code ydah in the longitudinal holes 32 of the shoe 10 and having shear thrust shoulders I3j allowing the specified distance the cone 9 and the shoe 10 when assembling the downhole core and lowering it into the well

The device works as follows

 When performing the work of attaching the borehole: the ccn with the casing string, the downhole measles is connected to the lower part of the casing by means of the sub 1.

12293082

and with it goes down the well. After descending the required length of the column, the ball valve is discharged into it, which closes sleeve 5. Subsequent creation of an overpressure inside the column of a given value leads to cutting off pin 7 and shifting sleeve 5 inside the barrel downwards. At the same time through the finger 4,

0 connecting the sleeve 5 with the suspension 6 and moving down along the longitudinal windows 3 of the barrel, the suspension 6 moves downwards, which leads to lowering of the working dies 8. As a result of movement of the dies 8 along the cone 9, the plates reach the wall of the well and jam the cone 9 inside the wellbore. After-. casing tension,

20 I act through the sub 1, the barrel, the shoe 10 and the stand P on the cone 9, prnvod51T to enhance the jamming of the cone in the borehole; kine, and when a certain value is reached - to cut off stubborn

25 piles 13 and pillars 11. As a result, pillars 11 are pushed into the longitudinal through holes of the shoe 10, and the barrel moves upward relative to the fixed in

30 bore, including the sleeve 5,. Fingers suspension 6, pivotally connected with it die B and cone 9. Moving the barrel 2 up by an amount equal to the height of the uprights 11, leads to

f: lifting the longitudinal windows 3 of the barrel to the same height above the upper end of sleeve 5 and forming a channel that connects the inner tube and annulus spaces necessary for

40 adjustment work carried out after tensioning the column by the required amount,

Compiled In, Homeland Editor O. Bugir Tehred.Hodan1gch Proofreader A.T. sko.

Order 2425/26 Tirad 548 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 13035, Moscow, Zh-35 (Raushsk nab, d. 4/5

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

Claims (1)

BOTTOM ANCHOR, comprising an upper sub for communicating with the casing string, a housing in which a sleeve with a saddle for a throw ball covering the radial windows of the housing mounted on a shear element is installed on a shear element and is located on the housing to interact with the sleeve when moving the release unit, characterized the fact that, in order to increase its reliability in operation, the release unit is installed with the possibility of limited axial movement relative to the housing and connected with it by shear elements, and the node p bond in the upper part is connected to the hub fingers arranged in the housing windows. £