SU1236098A1 - Arrangement for running logging instrument into hole - Google Patents

Description

This invention relates to tools for delivering logging tools to gently sloping and horizontal wells.

The purpose of the invention is to increase the reliability of work in conditions of varying cross section sk :: axins.

The drawing shows a diagram of the device.

The device contains two identical self locking pairs of supports 1 and 2, between which the mechanism 3 of reciprocating movements is located. Each of the supports, for example, 1, is formed by the shoes 4 and 5, which are pivotally connected to the levers 6–9 with the shoulders and the friction segments 10 mounted on them, and springs (not shown) are placed inside each pair of levers 6–9 that create a constant clamping levers or shoes against the borehole 11.

The hinge 12 with a thrust 13, a clutch 14 and a second thrust 15 with an emphasis 16 is connected to the mechanism 3. A hinge assembly 18 of the support 2 is also connected to the latter by means of a slider 17. This is a thrust assembly 19, the coupling 20 with a collet chuck 21 and a ball pin 22, a rod 23 with an anvil 24 and a shank 25 serves to secure and tighten a cable or a downhole tool (not shown), and a hook 26 is attached to the hinge 13 of the hinge 12, which transmits the force to the transported skvzkin device,

In the actuator 3, an electric motor 27 is placed, the rotational moment of which is through the gearbox 28, the screw pair 29 is transferred to the slider 17 by means of the link 30. The nut 31 and the stop lug 32 serve to adjust the collet chuck 21.

The device works as follows.

The drive is introduced into the well 11 by pressing on the shank 25 and pushing the supports 1 and 2 in the direction of the bottom. In doing so, the walls of the borehole 11, acting through the friction segments 10 of the levers 6 and 7, bring together the shoes 4 and 5. The movable hinge of the support 1 slides over 15 and the entire support 1 contracts. The contact with the rock of the well 11 alternately presses the friction segments 10 and the shoes 4 and 5 o In the same way fold

five

0

five

0

h

0

five

0

five

with and the levers of support 2 with the introduction of the device into the well 11.

When the electric motor 27 of the actuator 3 is turned on, the rotational moment is transmitted through the gearbox 28, the worm gear pair 29 and the slide 30 to the slider 17. The rocker mechanism alternately pushes each other and pushes the supports 1 and 2 by means of the thrusters 15 and 23 and the slide 17. The occurrence of the expansion force from the slide 17 is transmitted to the hinge 18, the movement of which is blocked by the levers 6 and 7 of the support 2 by choosing a wedge angle and additional force of the springs (not shown) of the levers 6-9 of the supports 1 and 2.

Since the hinge assembly 18 is blocked, the expansion force pushes the hinge assembly 12 forward through the thru 15, since the levers 6 and 7 with the friction segments 10 do not impede this movement to the face (the resulting friction force does not split, but folds the levers).

When a tightening force occurs between the body of the mechanism 3 and the slider 17, the hinge assembly 12 is blocked, since the friction force between the segments 10 of the levers 6 and 7 and the borehole wall 11 contributes to the wedging of the knot 12. The force is transmitted to the hinge 18, which is pulled to the mechanism 3 , since the resulting friction force contributes only to the wedging of the support arms 2. Reaching of the latter occurs as long as the tightening force acts. When an expansion force occurs between the slider 17 and the casing of the mechanism 3, the support 2 is blocked and the support 1 moves forward, pulling along a downhole tool (not shown) attached to the shank 25.

To remove the device from the well, a force must be created on the shank 25, which exceeds the actuation force of the sleeves 14 and 20. The amount of force is adjusted by varying the stiffness of the split collet clamp 215 by rotating the nut 31, which acts on the thrust 32 of the collet 21.

Before the new work cycle, the ball pins 22 of the sleeves 14 and 20 are re-inserted into the collet clamps 21.

Editor M.Blanar

Compiled by V. Strelchenko

Tehred L. Serdyukova Proofreader G. Reshetnik

3073/33

Circulation 548 Subscription

VNII11I State Committee of the USSR

for inventions and discoveries 113035, Moscow, F-33, Raushsk nab., 4/5

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

Claims (1)

1. DEVICE FOR DELIVERY OF A LOGGING DEVICE TO A WELL, containing two pairs of supports with articulated spring levers and shoes, two pairs of mechanical rods connected by means of couplings with a reciprocating drive, characterized in that, in order to increase the reliability of operation in a changing cross section wells, it is equipped with collet clamps, spherical fingers and friction segments, moreover, articulated spring-loaded levers are knee-shaped with shoulders and friction segments mounted on them, they are pivotally connected to the shoes, and the couplings are made in the form of a pair of collet clamp - ball pin with the ability to adjust the collet clamp.