RU2302510C1 - Guiding device for address drill string introduction in side well bore during well operation - Google Patents

Abstract

FIELD: oil industry, particularly means for setting the tools into, or removing the tools from, laterally offset landing nipples or pockets.

SUBSTANCE: guiding device comprises transporting tool with movement direction change mechanism including shaft. Connecting-rod with stem is suspended to the shaft by means of sleeve nut. Connecting-rod rotator having splined projections and annular groove is threadedly fastened to the shaft. Support washer is arranged between shaft end and splined projections of the rotator. Spring-loaded members brought into permanent contact with control-rod stem are installed in annular groove of the rotator. Control-rod is connected with ram-valve assembly by means of intermediate sub. Bush with fixing means, which provides tool entrance in side bore is arranged in ram-valve assembly body. The bush is retained in ram-valve assembly body with shear pin and terminates with partition having orifices and with pug secured to the partition and provided with fixer. Fixing means include body and die connected to inclined body surface with shear pin and fixer. Ram-valve assembly body and bush have common orifice.

EFFECT: increased efficiency.

2 dwg

Description

The invention relates to the oil industry and may find application in the operation of the well.

A device is known for delivering geophysical instruments to a horizontal well, which is equipped with clamps and additional load in the form of sections made with the possibility of stringing on a wireline cable. At the ends of the sections and clamps made locking elements. An additional load is placed above the top clamp on the wireline. Cargo sections are made tubular with a cut under the wireline cable. The sections of the cargo are made of locking elements. The descent of the geophysical instrument is carried out with the simultaneous collection of the required number of cargo sections. Dismantling of the load when lifting the logging tool is carried out in the reverse order. The locking elements are made in the form of nipples and couplings. The nipple has a locking protrusion, which is placed in a split groove of the coupling when they are joined together (RF Patent No. 2054539, publ. 1996.02.20).

The known device during the descent passes by the side wellbore.

Closest to the proposed invention in technical essence is a device for delivering an object to the lateral trunk of a multilateral well, including a transporting body with a mechanism for changing the direction of movement (RF Patent No. 2142559, publ. 1999.12.10 - prototype)

The known device does not provide reliable entry into the side wellbore.

The proposed device solves the problem of improving the reliability.

The problem is solved in that in the guide device for the targeted input of the technological tool into the side wellbore during its operation, including a transporting body with a mechanism for changing the direction of movement, according to the invention, a transporting body with a mechanism for changing the direction of movement consists of a barrel on which with a sleeve nut a connecting rod with a shank is suspended, a connecting rod rotator is attached to the barrel along the thread, having spline protrusions and an annular groove, between the barrel end and the spline a support washer is installed with the connecting rod rotary strings, spring elements are installed in the annular groove of the connecting rod rotor, which are in constant contact with the connecting rod end, the connecting rod is connected to the die-valve assembly via an intermediate sub, in the housing of which there is a sleeve with a mounted assembly for fixing the technological tool in the side the barrel, the sleeve is fixed in the housing by a ram-valve assembly with a shear pin, the sleeve ends with a baffle with holes and fixed to a burnout cork with a latch, and the fixation unit consists of a housing, on the inclined surface of which a die is fixed with a shear pin and a latch, while the housing of the fixation unit and the sleeve have a combined hole.

Figure 1 and 2 presents the claimed guide device for targeted input of a technological tool into the side wellbore during its operation.

The device consists of a barrel 1, on which, using a sleeve nut 2, the connecting rod 3 body 3 is suspended. A barrel 1 of the connecting rod rotator 4 is connected to the barrel 1 by a thread with splined protrusions from the bottom. A support washer 5 is installed between the end of the barrel 1 and the splined protrusions of the rotator 4 of the connecting rod 9. Springs 6 are mounted in the annular grooves of the rotator 4 of the connecting rod 9, mounted on rivets 7 and latches 8. The connecting rod 9 is fixed in the connecting rod body 3 through the ball bearing 9 and by intermediate sub 10 is connected to the housing 11 of the die-valve assembly of the device. A sleeve 12 is placed in the housing 11 of the ram-valve assembly, into which a mounting assembly for fixing the technological tool into the lateral wellbore is mounted, consisting of a housing 13, on the inclined surface of which the die 14 is fixed by means of a shear pin 15. A lock 16 is installed in the housing 13 of the fixing assembly preventing the exit of the die 14 beyond the body 13 of the fixation unit after passing through the lock of the side barrel. The housing 11 of the die-valve assembly and the sleeve 12 have a combined hole 17. When lowering into the well, the sleeve 12 is fixed in the housing 11 of the die-valve assembly with a shear pin 18. The sleeve 12 ends with a partition 19 with holes 20 and a direct-flow channel in which the plug 21 is located. The plug 21 closes the direct-flow channel in the partition 22 installed in the lower part of the housing 11 of the ram-valve assembly. A lock 23 is mounted on the plug 21, attached to the plug 21 by a bolt 24. A guide shoe or a mill 25 is screwed to the bottom of the housing 11, depending on the work being performed. The top of the device is connected to a tubing string (not shown).

The device operates as follows.

The guide device on the tubing string is lowered into the well. Not reaching 1.5-2 m before entering the side shaft, the washing fluid is circulated, continuing the descent of the device with rotation of the tubing string at an emergency rotor speed. The flushing fluid flowing out of the combined hole 17, due to the jet reactive force and the articulated suspension, presses the housing 11 against the opposite wall of the well. When passing in the nominal diameter of the borehole, the guiding device rotates together with the tubing string, overcoming friction against the borehole wall. The torque from the tubing string to the connecting rod 9 is transmitted by springs 6 in contact with the shank of the connecting rod 9. The springs 6 are able to stretch and slip along the shank of the connecting rod 9 without rotation. With a multiple increase in resistance to rotation when entering under the arch of the sidetrack, the tool pressed against the wall of the well without rotation enters the sidetrack.

At the entrance to the lateral barrel and at the rated load, the pin 18 is cut off and the assembly is lowered into the lateral barrel until the intermediate sub 10 stops against the end of the sleeve 12. Then the pin 15 is cut off, the die 14 is pushed up and locked with a spring-loaded latch 16.

In the process of landing of the sub 10 on the end face of the sleeve 12, the septum 22 converges from the plug 21, the fluid duct opens through the septum 22, and the combined side channel 17 is closed. The sleeve 12 is blocked from axial movements by the latch 23 on the partition 22.

The necessary technological operations are carried out in the sidetrack. The layout is raised from the well without any preliminary preparatory measures.

The application of the proposed device will improve the reliability of entry into the side wellbore.

Claims (1)

A guide device for targeted input of a technological tool into the side wellbore during its operation, including a transporting body with a mechanism for changing the direction of movement, characterized in that the transporting body with a mechanism for changing the direction of movement consists of a barrel on which a connecting rod with a shank is suspended using a sleeve nut , a connecting rod rotator is attached to the barrel by thread, having splined protrusions and an annular groove between the barrel end and the splined protrusions of the connecting rod rotator a supporting washer is installed, spring elements are installed in the annular groove of the connecting rod rotor, which are in constant contact with the connecting rod shank, the connecting rod is connected to the die-valve assembly by means of an intermediate sub, in the housing of which there is a sleeve with a mounted assembly for fixing the technological tool into the side shaft, sleeve fixed in the housing of the valve-valve assembly with a shear pin, the sleeve ends with a baffle with holes and a stopper fixed to the baffle, and the fixation unit consists of a housing, on the inclined surface of which a die is fixed with a shear pin and a retainer, while the housing of the ram-valve assembly and the sleeve have a combined hole.

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