RU2675277C1 - Automatic release - Google Patents

Abstract

FIELD: oil and gas industry.SUBSTANCE: invention relates to the field of oil and gas industry, in particular, to the stand-alone devices in the well installation devices, and can be used in the downhole processes studies. Device contains a cylindrical body, at which bottom a blind threaded hole for lowered devices is made, onto the body upper end a tip is screwed in. In the tip cavity wall transverse holes, balls are freely placed, on the tip a cap with the annular groove at the input to the internal cavity is put on, in the hole along the body longitudinal axis a rod is movably placed, on which from the lower end the grooves are made in the form of rack teeth, and on the upper end there is an annular groove. By the grooves in the form of rack teeth the rod has an engagement with at least two diametrically located levers, which one end is made in the form of gear teeth, and on the opposite one rollers with possibility of rotation are mounted, through the body grooves extending beyond the body outer contour. In each lever middle part there is a hole, through which the axis passes, movably connecting the lever and the body. Rod lower end passes through the hole in the button, which is placed in the body recess and has a spring-loaded displacement across the stem relative to the body. On one side hole in the button is made stepped, in the rod middle part there is an annular protrusion, against which attached to the stem from below and from above springs are resting, which hold the rod in the predetermined position relative to the body.EFFECT: increase in the device reliability and its operation convenience.1 cl, 4 dwg

Description

The invention relates to the field of the oil and gas industry, in particular, devices for installing stand-alone devices in the well and can be used in the study of downhole processes with stand-alone devices. The device is intended for lowering autonomous devices into the well, holding them at a given depth in the nearest coupling joint of tubing (hereinafter tubing), and lifting devices to the surface.

Known controlled clamping device for downhole tools (AS USSR No. 1328495, ЕВВ 47/00, 08/07/1987), comprising a housing, an electromechanical drive, a power rod associated with a clamping element mounted on an axis fixed in the housing, equipped with conical washers mounted on the axis, while the clamping element is installed in the housing with a gap, and the hole in the clamping element under the axis has a diameter greater than the diameter of the axis by the amount of clearance between the clamping element and the housing.

The disadvantage of an analogue is the presence of a built-in electric drive. In this regard, the design is complicated, a high degree of sealing of the electric drive is required, a cable and a power source are required, which in total complicates and increases the cost of production, as well as the operation of the clamping device.

There is also known a device for fixing the device in a well (AS USSR No. 1219793 Е21В 47/00, 03/23/1986), comprising a centering unit with clamping shoes, a traction system, a sleeve and a coupling, between which a compression spring is provided, which is rigidly fixed to the coupling with plates with balls, while the sleeve is made with longitudinal grooves and an annular recess with a conical recess, the balls being placed in longitudinal grooves with the possibility of longitudinal movement in them and interacting with the annular recess and a conical recess.

The disadvantages of the analogue are: the impossibility of holding the device on the walls of the pipe and releasing it without constant communication with the bar, on which the device is lowered into the pipe; the requirement of a complex drive to control the device: the movement and rotation of the rod, the presence of a rod system to create support for the housing of the device when moving the rod; multi-element and design complexity of the device; significant overall dimensions and low reliability of the device.

The closest in technical essence and the achieved result to the claimed is a device for installing devices in a well (RF patent for utility model No. 56472, ЕВВ 47/01, 09/10/2006), containing a housing with a tip in the upper part for installing and removing the device with a drive on cable and with a bayonet assembly in the lower part for hanging devices under the device, elements for interacting with the pipe coupling clearance in the well mounted on the housing, while elements for interacting with the pipe coupling clearance are made in the form of elastic erzhney on which end legs disposed to enter the gaps coupling tubes, while on the top legs configured to exit the bevel coupling gap when lifting the device out of the hole, and the diameter of the outer edges of the clutches is configured equal to the diameter of the largest diameter of the coupling hollows bottom clearances.

The disadvantages of the closest analogue adopted for the prototype are the lack of a mechanism for holding the elastic rods in a position that allows the device to be lowered into the tubing, since the paws will go into the nearest coupling gap when lowering and lock the device, the requirement for an electric drive on the cable to install and remove the device from the coupling gap complicating the operation of the device. The absence of a follow-up system for coupling clearances implies the release of the device from the electric drive in the tubing approximate in depth, as a result of which the device with the attached device will slide inside the pipes to the nearest lower coupling clearance. At the same time, the landing of the device on the coupling gap will occur with impact, which reduces the reliability of the design.

The tasks to be solved by the claimed invention are aimed at expanding the functionality of the device due to the use of one device for different tubing diameters, performing the function of tracking the coupling clearances, reducing shock loads on the device when landing on the coupling gap, reducing the lifting force of the ATC automatic chain cutter from pipes Tubing, as well as reducing the overall dimensions of the device.

The technical result of the invention is to increase the reliability of the device and increase the convenience of its operation.

The tasks are solved, and the technical result is achieved by the fact that in the device for installing devices in a well containing a cylindrical body, a blind threaded hole for connecting the descent devices is made at the bottom, and the tip, in contrast to the prototype, is screwed into the transverse holes in balls are freely placed on the wall of the tip cavity, a cap is fitted on the tip having an annular groove at the entrance to the internal cavity, w ok, on which grooves are made in the form of rack teeth from the lower end, an annular groove is provided at the upper end, and the rod with grooves in the form of rack teeth has gear engagement with at least two diametrically arranged levers, one end of which is made in the form of gear teeth, and on the opposite side, rollers are mounted for rotation, extending through the slots in the housing beyond the outer contour of the housing, in the middle of each lever there is an opening through which the axis resembles, movably linking the lever and the housing, lower the end of the stem passes through the hole in the button, which is placed in the recess of the housing and has a spring-loaded relative to the housing movement across the stem, the hole in the button being made stepwise on the one hand, in the middle of the stem there is an annular protrusion on which the springs mounted on the bottom and on top which hold the stem in position relative to the housing.

The design of the proposed device provides increased reliability by the fact that the landing of the device with the descent device on the coupling clearance of the tubing pipes occurs in shock-free mode, thereby eliminating shock loads on the elements of the device and the descent device. In the inventive device, the number of functions is reduced, and with it the number of parts due to the fact that tracking joints and holding the device at the joint is made by the same parts. Reducing the effort when lifting is achieved due to the fact that the levers are equipped with rollers, jerks of the wire on which the device is removed from the tubing pipe are reduced, since when passing pipe joints, the rollers roll out of the joints without meshing at the edges of the pipes.

Improving the usability of the device is achieved due to the fact that there is no electric drive and power supply cable, the number of operations to prepare the device for launching into the tubing is minimized and is done manually, without the use of specially designed tools and devices for this purpose. The reduction in size and weight is ensured by the implementation of the previous paragraph.

The use of one instance of the device for different tubing diameters is carried out through the use of interchangeable levers having an appropriate length.

The invention is illustrated by drawings. In FIG. 1 presents a schematic diagram of the proposed Auto-coupled ATsM, in FIG. 2 - the state of the elements of the device during descent, in FIG. 3 - the position of the device at the junction of pipes, in FIG. 4 - the state of the elements of the device when lifting.

The ATC auto-coupler consists of a housing 1, FIG. 1, from the bottom of which there is a hole for connecting the descent devices, and a tip 2 having an internal cavity in the form of a longitudinal blind hole is screwed onto the upper end. Balls 3 are freely placed in the transverse holes in the wall of the tip cavity, a cap 4 is put on the tip, having an internal transverse groove at the entrance to the internal cavity, a rod 5 is movably placed in the hole along the longitudinal axis of the body, on which grooves are made in the form of teeth , at the upper end there is an annular groove, and the rod grooves in the form of teeth of the rack has gear engagement with at least two diametrically located levers 6, one end of which is made in the form of gear teeth, and and the opposite rotatably mounted rollers 7, extending through the slots in the housing of the outer contour of the housing. In the middle part of each lever there is a hole through which the axis 8 resembles, movably linking the lever and the body, the lower end of the stem passes through the hole in the button 9, which is placed in the recess of the body and has a spring-loaded movement across the stem due to the spring 10, and the hole the button is made stepped on one side. In the middle part of the rod there is an annular protrusion 11, in which the spring 12 abuts against one end, resting on a groove in the body, and the spring 13, the second end resting on the inner ledge of the tip cavity.

Auto-ATCM operates as follows.

The first stage is preparation for the descent. In the blind threaded hole in the lower part of the housing 1, FIG. 1, attach a descent device (device not shown). The cap 4 is pre-fixed on the wire on which the device is lowered (the wire is not shown), and put on the tip 2, for which the levers 6 are pressed down. The rod 5 by means of a rack gear rises up, compressing the spring 13, the balls 3 are moved into the groove of the rod and allow the cap to be fully put on the tip. The lower end of the rod rises and releases the button 9. The button under the action of the spring 10 moves to the left until it stops with the wall of the stepped cutout in the rod. The position of the elements of the device in preparation for the descent is shown in FIG. 3. After putting on the cap, the levers release and press the button 9. The rod jumps off the step stop of the button, the spring 13 opens, moves the rod down, the balls are pushed out of the groove of the stem and move into the groove of the cap, fixing it from axial movement. The state of the device before descent is shown in FIG. one.

The second stage is the descent of the device into the pipe. At the entrance to the pipe, the levers rotate in the direction of travel, since they have a larger overall dimension in a swing than the inner diameter of the pipe, and the rollers 7 roll on the inner surface of the pipe, pressing against the surface under the action of the spring 12, FIG. 2.

The third step is to hold the device in the pipe. After the descent and the passage of the required pipe junction, the device begins to slowly lift up. Lever rollers fall into the coupling clearance of the tubing pipes, the spring 12 is opened, and the rollers are held by the edge of the end of the upper tubing pipe. With the further lifting of the device, the levers turn and raise the rod up, compressing the spring 13. The lower end of the rod releases the button, which is moved by a stepped cut under the rod under the action of the spring 10 and blocks the downward movement of the rod. With further movement of the rod, the balls 3 fall into the groove of the rod, freeing the cap, and the cap on the wire rises up. Gravity begins to lower the device down. After the rod stops in the button, the levers are not able to rotate on the axes, the device remains suspended in the coupling joint. Since the device sits on the edge of the lower tubing pipe at the junction almost unshocked due to small movements after releasing the cap, this reduces the shock loads on the elements of the device and the device. The position of the device in the coupling clearance is shown in FIG. 3.

The fourth stage is lifting the device. A catcher (not shown) is lowered on a wire, grab the device by the tip and lift up. The levers are rotated, the rollers come out of the joint and run in the inner contour of the pipe string, while the rod moves synchronously upward, compressing the spring 13. The position of the device elements when lifting is shown in FIG. four.

So, the claimed invention allows to expand the functionality of the device due to the use of one instance of the device for different diameters of tubing pipes, to reduce weight and size, and also to increase the reliability of the device and the convenience of its operation.

Claims (1)

A device for installing devices in a well, comprising a cylindrical body, at the bottom of which a blind threaded hole is made for connecting the descent devices, and a tip is screwed onto the upper end, characterized in that balls are freely placed in the transverse holes in the wall of the tip cavity, and a cap is fitted on the tip having an annular groove at the entrance to the internal cavity, in the hole along the longitudinal axis of the housing a rod is movably placed, on which grooves are made in the form of teeth of the rail from the lower end, on the upper m end there is an annular groove, and the rod grooves in the form of rack teeth has gear engagement with at least two diametrically arranged levers, one end of which is made in the form of gear teeth, and on the opposite side the rollers are installed, which rotate through the slots in the housing outside the diameter of the case, in the middle part of each lever there is a hole through which the axis resembles movably linking the lever and the case, the lower end of the rod passes through the hole in the button, which is placed in the recess of the case mustache and has a movement springing relative to the housing across the stem, the hole in the button being made stepwise on the one hand, in the middle part of the stem there is an annular protrusion, which are supported by springs placed on the rod from below and above, which hold the springs in a predetermined position relative to the housing.

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