EA000285B1 - Method of pipe repair and preparation for use of threaded oil pipes and mobile repair complex thereof - Google Patents

Abstract

1. Method of pipe repair and preparation for use of threaded oil pipes comprising that according to the technological process first the pipe curvature of each pipe is checked their sorting and cleaning, then further a linear and non-destructive method of a pipe body is performed threaded elements are inspected and rethreaded by machining operations, if needed, after which the pipes are pressurized, anti-scratching coating is applied on the pipe threaded elements, anti-corrosion coating is applied and further dried, after which the pipes are marked and collect into pipe columns, characterized in that the least worn threaded elements are restored by ultrasonics after which the quality control of the threaded elements is performed and a single technological stream of pipe repair is separated into two technological substreams: the first of which repairs the pipes with least worn threaded elements, subjecting them to the ultrasonic treatment, followed by hydraulic pressure tests sand further applying anti-scratch coating on the pipe threaded elements and the second repairs the pipes by mechanical machining of the most worn pipe threaded elements and the lest worn pipe threaded elements which failed to repair after ultrasonic treatment undergone in the first technological substream, after which the pipes are sent back to the first technological substream to subject threaded elements to ultrasonic treatment and pipes to hydraulic pressure tests and further applying anti-scratch coating on the pipe threaded elements, wherein the hydraulic pressure tests are combined the non-destructive test of the pipe body, using a method of acoustic emission, and between the ultrasonic treatment of the threaded elements and applying the anti-scratch coating on the threaded element of each pipe time is kept of lesser period of metal relaxation on the contact surfaces of threads. 2. Mobile repair complex, comprising technological equipment installed along the technological process and having all required mechanisms, including rolling stand with a device for checking pipe curvature, a unit for pipe cleaning, an apparatus pipe body diagnosis, a means for controlling of the threaded elements quality, equipment for rethreading threaded elements, using machining operations, apparatus for hydraulic tests with fixed pressing head and movable pressing plug, a unit for applying of anti-scratching coating on piped threaded elements, a device for cleaning the inner pipe surfaces, a unit for applying anti-corrosion coating on the pipe inner surfaces, putting final marking on pipes and a sorting stand, characterized in that the mobile repair complex is additionally provided with a marking means, units for ultrasonic restoration of pipe and coupling threaded elements and an apparatus for non-destructive control of a pipe body, using a method of acoustic emission, wherein the technological equipment is stationary mounted in mobile functional module blocks and additional marking means is mounted in the module diagnostics block, module block of the thread quality control is provided with the pipe handling means, wherein a device for ultrasonic restoration of coupling thread element is mounted above the entry pipe handling equipment and movable pressing plug for hydraulic test is mounted above the exit pipe handling means, while the fixed pressing head for hydraulic test and the device for ultrasonic restoration of pipe threaded element are mounted in the generator module block, and a transportation module block is placed between the block of the thread quality control and the generator module block and equipped with the pipe handling means, intermediate stand, arranged between the entry and exit pipe handling means and carriages, movably mounted in the guides to handle pipes to the devices of the ultrasonic restoration of the coupling and pipe threaded elements and, correspondingly to the movable and fixed pressing plug and head, wherein the apparatus for non-destructive control of a pipe body, using a method of acoustic emission, is mounted on a carriage, adjacent to the movable pressing plug for hydraulic tests.

Description

The present invention relates to the oil and gas industry and can be used for the restoration, repair and preparation for operation of threaded oil and gas field pipes, including pump-compressor, casing and drill pipes.

There is a method of repair and preparation of oilfield pipes for operation [1], which consists in the fact that initially in a single process stream they control the curvature of each of the pipes, sort them out and clean, then carry out linear and non-destructive testing of the pipe body, monitor the quality of their threaded elements and carry out the repair of the latter by machining, after which they are subjected to hydraulic testing of the pipes, an anti-seize coating is applied to the pipe threaded elements, after which they are cleaned internally w pipe surface, it is applied to an anticorrosive coating, followed by drying, and then the tube and labeled complement to the tubular string. From the same source of information [1], a complex is known for implementing the method of repairing and preparing oilfield pipes for operation, containing a process equipment installed along the process and interconnected by mechanisms for moving pipes, including a loading device, a unrolling rack with a device for monitoring pipe curvature, installation of pipe cleaning, installation of pipe body diagnostics, installation of quality control of threaded elements, equipment for the repair of threaded elements by m Mechanical processing, installation of hydraulic testing of pipes with a stationary crimping head and a movable pressing joint, installation of anti-seize coating on pipe threaded elements, installation of cleaning the inner surface of pipes, installation of coating the internal surface of pipes with an anti-corrosion coating, installation of final marking of pipes and sorting rack.

Repair of threaded elements by a known method is carried out by machining on turning equipment. Recovery by re-cutting is often associated with a segment of pipe sections, which leads to an increase in the specific metal consumption of pipes per ton of mined products.

A common problem of preparing for the operation of threads of oil field pipes is the imperfection of the geometrical conjugation of threaded elements, which consists in carrying out their mutual break-in by lapping and leading to a decrease in their resistance to wear, fatigue failure, impact, loss of tightness. All this, in turn, leads to a decrease in the reliability of pipe columns, an increase in the accident rate and the environmental hazard of work; the reduced resource of oil field pipes increases the cost of the extracted oil and gas products.

In addition, the well-known complex, which carry out the repair and preparation of oil field pipes for operation [1] is stationary. Transportation of pipes from deposits to a stationary complex and back is an expensive and time-consuming operation.

The well-known complex occupies large production areas, mainly due to a large fleet of machines for the machining of threaded elements, which requires large capital and ongoing costs.

The invention is aimed at reducing the specific consumption of metal pipes and couplings, improving the reliability of threaded connections, reducing accidents and environmental risks of working with pipe columns by creating a more uniform stress state of the threaded connection (ultrasonic treatment) and increasing the actual contact area in it (coating the pipe threaded elements by detonation spraying). In addition, the invention is aimed at reducing the time to repair pipes due to the mobility of the organization of production (the equipment of the complex is mounted in functional modular units moved to the field).

This is achieved by the fact that the method of rehabilitation and preparation for operation of threaded oil and gas field pipes is that initially in a single process stream they control the curvature of each of the pipes, sort and clean them, then carry out linear and non-destructive testing of the pipe body, and control their quality. threaded elements and carry out the repair of the latter by machining, then subjected to pipe hydraulic testing, applied to pipe threaded elements anti-back The irregular coating, after which the inner surface of the pipes is cleaned, an anti-corrosion coating is applied on it, followed by drying, and then the pipes are marked and assembled into pipe columns.

The difference from the prototype according to the invention is that the repair of the least worn threaded elements is carried out by ultrasonic restoration, for which, after quality control of the threaded elements, a single technical flow of pipes is distributed to two process streams, the first of which is directed to the pipes with the least worn threaded elements, exposing the latter ultrasonic treatment, then carry out hydrotesting of pipes with the subsequent application of anti-seize coating on pipe threaded elements, and in the second the technological stream mechanically repairs the most worn threaded elements of pipes and the least worn threaded elements that have not recovered after ultrasonic treatment in the first process stream, then the pipes of the second process stream are sent to the first process stream, exposing their threaded elements to ultrasonic treatment, and hydrotesting pipes with subsequent application of anti-seize coating on pipe threaded elements, while hydrotesting pipes ovmeschayut with nondestructive pipe body control method of acoustic emission, and between ultrasonic treatment threaded elements and application of antifriction coatings on threaded tubular element of each of the tubes is maintained time period of minimal metal relaxation on the contact surfaces of the threads.

The task is also solved by the fact that the mobile complex for implementing the method contains installed along the process and interconnected mechanisms for moving pipes technological equipment, including a loading device, a roll-out rack with a device for monitoring the curvature of the pipes, a pipe cleaning installation, a diagnostic installation of the pipe body, installation of quality control of threaded elements, equipment for the repair of threaded elements by mechanical processing, installation of hydraulic tests of pipes with a fixed pressing head and a movable pressing plug, installation of applying an anti-seize coating on pipe threaded elements, installation of cleaning the inner surface of pipes, installation of applying an anti-corrosion coating on the internal surface of pipes, installing a final marking of pipes and sorting rack.

The difference from the prototype according to the invention is that the complex is equipped with an additional marking device, ultrasonic restoration installations for pipe and coupling threaded elements and a device for non-destructive testing of the pipe body by acoustic emission, while the process equipment is permanently mounted in mobile functional modular units, with the additional marking device installed in the modular diagnostic unit, modular thread quality control unit is equipped with an input The first and the output vehicle for moving the pipes, while above the input vehicle for moving the pipes of the specified unit, an ultrasonic recovery installation of the threaded coupling element is mounted, and above the output - a movable pressure test plug for the hydraulic test installation for pipes, while a fixed pressure test head for the hydraulic test installation and installation ultrasonic recovery pipe threaded element placed in the generator module unit, and the transport module The unit is installed between the thread quality control unit and the generator modular unit, equipped with inlet and outlet vehicles for moving pipes, an intermediate rack placed between the inlet and outlet vehicles, and carriages movably installed in guides to move the pipes to the ultrasonic recovery units of the coupling and pipe threaded elements and, respectively, to the movable and stationary crimping plug and the head of the installation of hydraulic testing, while The trio of non-destructive testing of the pipe body by the method of acoustic emission is mounted on the carriage closest to the movable crimping plug of the installation for hydraulic testing of pipes.

The invention is illustrated by drawings, where in FIG. 1 shows a general view of the complex that implements the method (top view); in fig. 2 — node A in FIG. one; in fig. 3 - section BB in FIG. 2

The complex contains installed along the process modular block 1 pipe cleaning with installation 2 pipe cleaning, for example gas-dynamic, modular unit 3 diagnostics with installation 4 diagnostics of the pipe body and an additional marking device 5 installed in the modular unit 3 along the axis of a permanently mounted vehicle 6 for the movement of pipes, for example, a drive roller conveyor.

In the modular unit 7 for quality control of threads, the installation 8 for quality control of threaded elements of pipes, the installation 9 of ultrasonic restoration of the coupling threaded element, located above the input vehicle 10, are installed to move the pipes, for example, a drive roller, and a hydraulic test fitting 11 pipe located above the output vehicle 12 to move the pipe, for example, roller.

In the modular unit 7 for quality control of threads, a panel 13 is installed to monitor and control the installation 14 of applying an anti-seize coating on pipe threaded elements, for example, by installing detonation spraying of an anti-seize coating.

This installation 14 is permanently installed in a modular block 15 applying an anti-seize coating connected to a modular thread quality control unit 7 via armored windows 16 and 17 belonging to, respectively, a modular thread quality control unit 7 and a modular anti-seize coating unit 15.

The modular block 15 for applying the anti-seize coating is connected to the ventilation module by the duller unit 18 by means of a flange connection 19.

Transport modular unit 20 contains stationary installed along its longitudinal axis, the input 21 and output 22 of the means for moving pipes, such as driven roller conveyors. At the same time between the input 21 and output 22 vehicles for moving pipes installed intermediate rack 23.

Transport modular unit 20 also contains located, respectively, at the inlet 21 and outlet 22 of the vehicle to move the pipe lifts 24 and 25 pipes. On the ceiling beam of the transport modular unit 20, guides 26 are mounted with movable carriages 27 and 28 equipped with pipe rotation mechanisms (not shown). The carriage 28 is equipped with a device for non-destructive testing of the pipe body by the method of acoustic emission (not shown). Transport modular unit 20 is connected to the modular unit 7 quality control threads flange connection 29.

The generator modular unit 30 comprises a stationary installation therein of an ultrasonic recovery unit 31 for a pipe threaded element.

The carriage 27 of the transport unit 20 is mounted for movement between the installation 9 of the ultrasonic restoration of the coupling threaded element and the installation 31 of the ultrasonic recovery of the pipe threaded element.

The generator modular unit 30 also mounted a stationary crimping head 32 of a pipe hydraulic test installation, a hydraulic unit 33 of a stationary pressing head 32, a computer 34 of the automatic process control system, and a unit 35 of ultrasonic generators of installations 9 and 31 of ultrasonic restoration of threaded elements.

The carriage 28 of the transport modular unit 20 is mounted for movement between the movable crimping plug 11 and the stationary crimping head 32 of a pipe hydraulic test installation.

The generator modular unit 30 is connected to the transport modular unit 20 by a flange connection 29.

The modular machining unit 36 comprises a pipe-cutting machine 37 and a socket-mounting unit 38 installed along the axis of the vehicle 39 for moving pipes, for example, a drive roller table.

Modular block 40 cleaning the inner surface of the pipe contains the installation 41 cleaning the inner surface of the pipe, such as a sucker rod installation gas-cleaning.

The modular inner coating application unit 42 comprises an anti-corrosion coating application installation 44 on the inner surface of the pipe, for example, pneumatic spraying, mounted along the axis of the vehicle 43 to move the pipes, for example, with a driving roller table.

In the modular drying unit 45, a drying chamber 46 with a vehicle for moving pipes, for example, a driven roller conveyor, is mounted.

In the modular technical control unit 48, a vehicle 49 is permanently installed to move pipes, for example, a drive roller conveyor, over which a tool control post 50 is located, and a computer communication console 51, 34 of the automatic process control system. The modular technical control unit 48 also includes a remote control 52 for controlling the installation of 2 gas-dynamic pipe cleaning of the modular pipe cleaning unit 1.

When deploying the complex on site, the modular units 1, 3, 7, 15, 36, 40, 42, 45, communicate with each other by means of mechanisms for moving the pipes 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, mainly driven roller conveyors, which are equipped with pipe transfer units, limit switches and pipe presence sensors (not shown), which ensure the operation of the complex in semi-automated and automated modes.

Vehicles to move the pipes 6, 10, 12, 39, 43, 47, 49 of each of the modular units 3, 7, 36, 42, 45, 48 are installed coaxially with the corresponding mechanisms for moving the pipes 53, 54; 57, 56; 55, 58; 60, 61; 61, 62; 62, 63.

The inlet 21 and outlet 22 vehicles for moving the pipes of the transport modular unit 20 are installed coaxially, respectively, with the inlet 10 and output 12 vehicles for moving the pipes of the modular thread quality control unit 7.

The complex contains a loading device 64, for example, a truck-mounted crane installed in the reach zone of a storage rack available in the field (not shown in Fig.) For storing pipes requiring repair, rolled rack 65, pipe inspection device 66 for curvature, for example, a drive roller table and camera 67 thermostating with stripping area for gross defects on the surface of pipes (not shown).

The complex contains cumulative racks 68, 69, 70, 71, 72 installed in the course of the technological process, designed for buffer storage of pipes in cases of interruptions in the rhythm of operation of individual functional modular units.

At the exit from the modular unit 48 of the technical control there is a sorting rack 73. The housing of each of the modular units 1, 3, 7, 15, 18, 20, 30, 40, 41, 42, 44, 48 can be performed, for example, on the basis of standard large-capacity containers, for example, types 1A and 1C GOST 18477-79.

The method using the proposed complex is as follows.

The proposed method can be processed as pipes that were in operation and accumulated at the field, as well as new pipes needed to replenish the fleet of pipes at the field, for example pipes NK 73 x 5.5 of different strength groups of GOST 63380.

First, on the roller table 66, the incoming inspection of the pipes to be processed for curvature is carried out and the presence of defects on the outer surface of the pipes is visually detected. Non-compliant pipes discard, and used pipes that have passed inlet control position at the same end and assemble into a package. Then the package of pipes is subjected to cleaning at installation 2 of hydrodynamic cleaning in a stream of gas heated to 180 ° <t <249 ° C, i.e. to a temperature higher than the melting point of deposits on the surface of pipes, including, in particular, tar-paraffins.

After cleaning, the package of tubes is disassembled, and the tubes are kept in the thermostating chamber 67 at t> 0 °, which is longer than the relaxation mode in order to eliminate the temperature inhomogeneities of the tube body.

Then carry out the cleaning of coarse defects on the outer surface of the nipple end of each of the pipes, for example defects of the type of burrs from the keys.

After that, each pipe in a single process stream is subjected to linear and non-destructive testing on the installation 4 diagnostics of the pipe body, namely: measure the thickness, length, perform a pipe body defectoscopy for the presence of discontinuities in the pipe body and expose eddy current testing to determine the strength of the pipe.

Then each pipe is pre-marked on the marking device 5 with an oil-resistant label, recording information about the pipe.

Non-fit body pipes are rejected.

After that, the threaded elements of each of the repairable pipes are pre-mechanically cleaned, quality control of the threaded elements is made, a conclusion is made about the maintainability of the pipes along the thread, and then the technology of further pipe repair is selected, distributing a single process stream of pipes to two process streams.

Pipes with the least worn threaded elements, which are subjected to ultrasonic treatment at installations 9 and 31 of ultrasonic restoration of threaded elements, are guided along the first technological stream.

The pipes are then subjected to hydrotesting on a movable and stationary pressure test plug 11 and the head 32 of the installation for hydraulic testing of pipes, combining them with non-destructive testing of the pipe body by the method of acoustic emission. Acoustic signals are recorded in the pipe, which allow predicting the development of hidden germs of defects in the pipe body in the early stages of hydrotesting, without leading the pipe body to fracture and determine the location of hidden germs of defects, including in places difficult to control for threading.

Pipes that have not undergone hydrotesting are rejected, and an anti-seize coating is applied to the pipe threaded elements using detonation spraying on the installation 14 of detonation spraying with anti-seize coating.

According to the second process stream, the pipes with the most worn threaded elements are guided, as well as the pipes, the least worn, whose threaded elements have not recovered after ultrasonic treatment in the first process stream.

In the pipes of the second process stream, the worn-out threaded element is trimmed and a new thread is cut by mechanical turning on a pipe-threading machine 37 with subsequent insertion of additional information about the length of the pipe into the marking label.

After that, the pipes of the second process stream are directed to the first process stream, where the threaded elements of each of the pipes are subjected to ultrasonic treatment in order to obtain the specified thread parameters at the ultrasonic recovery units 9 and 31, respectively, of the coupling and pipe threaded elements.

Then the pipes are subjected to hydrotesting, combining them with non-destructive testing by acoustic emission at the non-destructive testing installation of the pipe body by acoustic emission method (not shown). Pipes that have not passed the hydrotest, rejected.

After that, anti-seize coating is applied to the pipe threaded elements by detonation spraying on the installation 14 of detonation spraying anti-seize coating.

In this case, between the ultrasonic restoration of the threaded elements of the pipes and the detonation application of an anti-seize coating on the pipe threaded element of each of the pipes is maintained for a time that is chosen less than the relaxation period of the metal on the contact surfaces of the threads. This provides a higher-quality diffusion coupling of the sprayed anti-seize coating with the metal base of the pipe threaded element in view of the continuing non-uniform stress state of the contact surfaces of the thread.

Then the inner surface of the pipe is cleaned on the rod installation 41 gas series cleaning.

After that, an anticorrosion coating is applied to the inner surface of the pipes on the pneumatic spraying installation 44, which is then dried in the drying chamber 46.

Then the pipes are finally labeled, adding additional information on the length and grade of the pipe to the oil-resistant label, sorted by strength groups specified in the oil-resistant label with the possibility of forming pipe columns.

The complex works as follows.

As needed, accumulated pipes that were in operation and require repair, and new pipes needed to replenish the fleet of pipes, the complex of vehicles (not shown), such as container ships, is delivered to the site for production deployment. Functional modules 1, 3, 7, 15, 36, 40, 42, 45, 48 of the complex, and other equipment of the complex are placed on the ground in a given technological sequence, are interconnected by mechanisms for moving pipes 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63 for the implementation of repair and preparation of pipes for operation.

The truck crane 64 pipes from the storage rack (not shown in Fig.), Available on the field, are fed to the raskatochny rack 65.

On the roll table 66, moving in rotational-translational motion, they undergo visual input control and curvature control.

The rejected pipes are placed in the pocket of the marriage (not shown in Fig.) With a liner (not shown).

The pipes that have passed the incoming inspection are collected in packages and are fed by the crane 64 to the installation 2 of gas-dynamic cleaning of the pipes of the modular cleaning unit 1 ύ \ ίχό. where to make pre-cleaning of the outer and inner surface of the pipe.

The cleaned packages of pipes by truck crane 64 are fed to the thermostating chamber 67, where they are rolled out by the operator, and then kept at t °> 0 ° C for a time longer than the relaxation period in order to relieve temperature stresses in the pipe body.

It also removes coarse defects on the outer surface of the nipple end of each pipe. After that, the pipes are fed to the drive roller table 53 by a transfer device (not shown) in a single technological stream, which are transferred to the modular module 3 for pipe diagnostics on the drive roller table 6, which, in turn, are transported to installation 4 for the diagnosis of the pipe body. In the modular unit 3, pipe diagnostics are subjected to electromagnetic flaw detection, thickness gauging, structuroscopy, and length measurement in order to determine the strength group of the pipe and identify defective pipes. Pipes that have not passed the diagnosis with a positive result, the transferor (not shown) fit into the pocket of the marriage (not shown).

Pipes that have been diagnosed with a positive result, driven roller 6, are transmitted to an additional marking device 5 for marking the oil-resistant label with information on the pipe, namely: the input pipe number, pipe type, pipe length, pipe class according to the minimum wall thickness, pipe strength group, etc. in accordance with GOST 633-80.

Marked pipes from the modular diagnostics unit 3 are driven by the driven roller conveyor 54 to the accumulation rack 68, and from there a transfer device (not shown) is transferred to the driven roller conveyor 55 for transportation to the first post of the installation 8 for quality control of the threaded elements of the threaded quality control unit 7.

The first operator performs a mechanical cleaning of the worn-out pipe threaded elements of each pipe, monitors the thread of the pipe threaded element and instrumental diagnostics of its condition, puts an intermediate mark on the maintainability of the pipe threaded element, and then sends the pipe to the second post of installation 8 for quality control of the threaded elements of the modular unit 7 quality control threads. For this, the pipe is again fed to the drive roller 55, from there to the accumulator rack 69, and then driven roller conveyor 56 is transported to the second post of the quality control installation 8 of the threaded elements of the modular thread quality control unit 7. Entered pipe enters the drive roller 10 modular unit 7 quality control threads. The operator stops the entered pipe, reads the mark on the pipe threaded element and controls the coupling threaded element of the entered pipe. After that, the operator makes a decision on the choice of the technological route of processing the pipe according to the state of its threaded elements and distributes the single technological stream of pipes into two technological streams.

Pipes with the least worn threaded elements are guided along the first technological stream. From the drive roller table 10, the pipe enters the drive roller table 21, and then the lift 24 rises to the level of installations 9 and 31 of the ultrasonic restoration of threaded elements.

After that, the pipe is fixed in the carriages 27, it is attached to the rotation and the pipe is fed to the installation 31 of the ultrasonic restoration of the pipe threaded element, and then to the installation 9 of the ultrasonic recovery of the coupling threaded element.

If the threaded elements of the pipes are restored, which is determined by automation (not shown), then the pipe lift 24 is placed on the intermediate rack 23, from which by means of the lift 25 is loaded into the carriage 28.

Sensors for non-destructive testing using acoustic emission method (not shown) are brought into contact with the pipe body. Carriage 28 on the guides 26 pipe is fed to the stationary crimping head 32 and is screwed together with the latter. The movable compression plug 11 is moved along the guides 26 to the coupling threaded element of the pipe and is screwed with the latter.

The pipe from the hydraulic unit 33 is filled with pressing liquid and is tested at a given pressure for a specified time.

In this case, non-destructive testing of the pipe body by the method of acoustic emission is carried out.

Pipes that have not passed the hydraulic tests, for the drive roller table 57 are sent to the reject pocket (not shown).

The second process brook directs the pipes with the most worn-out threaded elements, rejected by the operator along the threads on the posts of installation 8 of the quality control of the threaded elements of the modular thread quality control unit 7, as well as pipes whose threaded elements have not recovered after ultrasonic treatment in the first technological stream.

The pipes rejected by the operator go through the drive roller table 10 in transit to the drive roller table 21, from which the lift 24 is shifted to the intermediate rack 23, onto which the pipe 24 also keeps the pipes, the threaded elements of which have not been restored on the ultrasonic restoration units 9 and 31.

From the intermediate rack 23, the pipe lifter 25 is shifted to the drive roller table 22, transported to the modular unit 7, whose drive roller table 12 is taken out of the modular unit 7, and then driven roller table 57 is fed to the accumulation rack 71.

Then the pipes in the single process stream of the second stream from the storage rack 71 through the drive roller table 58 arrive at the drive roller table 39 of the modular machining unit 36, in which the rejecting threaded pipe element is cut and the thread is cut at the pipe-cutting machine 37.

The operator of the modular unit 36 machining makes adjustments to the marking of the length of the pipe after it is cut.

If only the pipe threaded element required repair, then the pipe passes the clutch-mounting unit 38 through the drive roller table 39 and the driving roller table 55 is again supplied to the operator of the first post of the quality control unit 8 of the threaded elements.

If the coupling end of the pipe requires repair, then the pipe is sent by the operator from the modular unit 36 along the drive roller table 39 through the drive roller table 58 to the drive (not shown).

Using a truck crane 64, the pipes are removed from the accumulator, unrolled by the coupling end during the process, are placed in the storage rack 71 and re-inserted into the modular machining unit 36, where the coupling end of the pipe is cut and the pipe-cutting machine 37 is cut, and then tightening and securing the new coupling on the pipe by means of the coupling installation 38. After that, the pipe is removed from the modular unit 36 by the driven roller table 39 and the roller table 58, the truck crane is deployed m 64 nipple end in the course of the process and is fed into the cumulative rack 71, from there the pipe passes through the modular block 36 and enters the first post of installation 8 of the quality control of the threaded elements.

The operator of the modular unit 36 makes adjustments to the marking of the length of the pipe after it is trimmed.

After that, the pipes of the second process stream return to the first process stream, undergo ultrasonic treatment and hydrotestings similarly to the pipes of the first process stream.

All pipes passed ultrasonic processing and hydraulic tests are served in the accumulation rack 70, where the drive roller table 59 is transported in a modular block 15 applying anti-scuff coating to the installation 14 detonation spraying anti-seize coating on pipe threaded elements. From the panel 13 of the modular thread quality control unit 7, the operator follows the process through the armored windows 16 and 17.

The pipe coated with the drive roller table 59 is transported to the accumulation rack 72, from the storage rack 72 enters the drive roller table 60, through which it is put into the modular unit 40 for cleaning the inner surface, where the final cleaning of the inner surface of the pipes is performed at the gas jet cleaning unit 41.

Then, with a drive roller conveyor 60, the pipe is delivered to the modular block 42 for applying an internal coating, where an anti-corrosion coating is applied to the inner surface of the pipe at the pneumatic spraying installation 44.

The pipe for the drive roller table 43 leaves the modular block 42 for applying the inner coating and gets on the drive roller table 61, which is supplied to the drying module module 45, where it is dried in the drying chamber 46, and then driven by roller roller 47 is removed from the drying module module 45 to the drive roller table 62 which is transported to the modular unit 48 technical control. The operator at the station 50 instrumental control of threads controls the threaded elements and, if necessary, makes adjustments in the marking of pipes for height, profile, thread class.

All information about the control of the pipe is recorded in the computer memory of the modular unit 30 by means of the console 51 is holy with the computer 34 of the process control system.

The operator of the installation 2 of gas-dynamic cleaning of pipes provides its start and management of the process of work from the console 52 of the modular unit 48 of technical control.

Pipes that have undergone technical control by the drive roller table 49 are removed from the modular technical control block 48 and arrive at the drive roller table 63 for delivery to the sorting rack 73, where the pipes are distributed to order pockets (not shown in the figures) with the possibility of forming pipe columns.

The use of the invention allowed to increase the turnaround time of the pipe more than doubled (for restored pipes as compared to new ones), respectively, to increase the environmental reliability and safety of work with pipe columns. In addition, the invention allowed the delivery of a mobile complex to any oil-producing field and quickly launch production in the field.

Information sources:

1. RD 39-2-197-79 Typical technological processes of preparation for operation and repair of tubing. VNIITNEFT, Kuibyshev., 1980.

Claims (2)

CLAIM 1. The method of repair and preparation for operation of threaded oil and gas pipes, which consists in the fact that the curvature of each pipe is monitored, cleaned and cleaned, then linear and non-destructive testing of the pipe body is carried out, and the quality of their threaded elements is monitored and carry out the repair of the latter by machining, after that they are subjected to hydraulic testing of pipes, an anti-seize coating is applied to pipe threaded elements, after They clean the inner surface of the pipes, apply an anti-corrosion coating on it, followed by drying, and then mark and complete the pipes into pipe columns, characterized in that the repair of the least worn threaded elements is carried out by ultrasonic restoration, for which, after quality control of the threaded elements, a single process flow pipes are distributed to two process streams, the first of which is directed to pipes with the least worn threaded elements, subjecting the latter to ultrasonic treatment, Then they carry out hydrotesting of pipes with subsequent application of anti-seize coating on pipe threaded elements, and in the second process stream, the most worn-out threaded elements of pipes and the least worn-out threaded elements that have not recovered after ultrasonic treatment in the first process stream are repaired, after that the second process stream is sent to the first process stream, plunging their threaded elements with ultrasonic treatment, and pipes hydrotesting followed by applying an anti-seize coating on pipe threaded elements, while hydrotesting pipes are combined with non-destructive testing of the pipe body by acoustic emission, and between ultrasonic processing of the threaded elements and applying anti-seize coating on the pipe threaded element of each pipe, the time less than the metal relaxation period is maintained by contact surfaces of threads. 2. Mobile complex containing installed along the process and interconnected mechanisms for moving pipes technological equipment, including a boot device, roll-out rack with a device for monitoring the curvature of the pipes, installation of pipe cleaning, installation of diagnostics of the pipe body, installation of quality control of threaded elements, equipment for the repair of threaded elements by machining, installation of hydraulic testing of pipes with a fixed crimping head and a movable pressing plug, installation of anti-seize coating on pipe threaded elements, installation of cleaning the inner surface of pipes, installation of application of an anti-corrosion coating on the internal surface of pipes, installation of final marking of pipes and sorting rack, characterized in that the complex is equipped with an additional marking device, installations of ultrasonic restoration pipe and coupling thread are placed in the generator modular unit, and the first element and device of non-destructive trans the sports modular unit is installed by monitoring the body of the pipe by acoustic method; it is awaited by the thread quality and emission generation control unit, while the technological equipment of the modular unit is equipped with inlet and stationary mounted in mobile outgoing vehicles for nonfunctional modular units, and moving pipes, intermediate shelving, the marking device is placed between the inlet and the outlet in the modular diagnostic unit, motor vehicles, and carriages, The single-unit quality control unit for threads is equipped with vizhno mounted in guides for inlet and outlet vehicles — moving pipes to ultrasound units for moving pipes, while the coupling and pipe cutting means of moving vehicles and, accordingly, to the said pipe moving over the inlet the unit is mounted with a mounting and stationary crimping plug and ultrasonic recovery of the coupling head of the hydraulic test installation, threaded element nta, and above the output is the movement with a non-destructive testing device for pressing the pipe plug of the hydraulic installation of the pipe by acoustic emission testing of the pipes, while still mounted on the carriage closest to the floor pressing of the installation of the hydraulic pressing crimp of the installation for testing and installation of ultrasonic hydraulic test tubes. repair pipe threaded element