RU172969U1 - LIFTING SELF-PROPELLED UNIT WITH HYDRAULIC WINCH DRIVE - Google Patents

Abstract

The utility model relates to the oil and gas industry and can be used for tripping during well repair. The technical result is to increase the reliability of the lifting unit. A self-propelled lifting device with a hydraulic winch drive is mounted on a chassis, to which the platform is attached, and contains an inclined mast with a tackle system and a hook block lifting limiter, mast lifting jacks, a main winch with a hydraulic drive, a control system, hydraulic pumps that feed the hydraulic winch drive. The control system consists of hydraulic, pneumatic and electrical systems. The hydraulic system is configured to raise and lower the mast. The pneumatic system is configured to control the main winch with a hydraulic drive. The electrical system in combination with hydraulic and pneumatic systems is configured to control the installation of the lifting unit in the well and the production of tripping operations. 16 s.p. f-ly, 3 ill.

Description

The utility model relates to the oil and gas industry and can be used for tripping during well repair.

A device for lowering and lifting a string of pipes into a well under pressure (as SU SU No. 1082928, IPC ЕВВ 19/00, published March 30, 1984) containing a tower installed on the wellhead, movable and stationary grippers for pipes, a transport platform and a winch located on it, a tackle system with forward and reverse gears for moving the column up and down, consisting of stationary blocks on the upper and lower bases of the tower and on the transport platform, equipped with a rigid brace, articulated with the upper base of the tower and trans ortnoy platform running rope ends snap forward and reverse directed along the strut and secured to a winch drum with an opposite direction of winding.

A well-known installation for repairing oil wells (patent RU No. 89592, IPC ЕВВ 19/00, published on December 10, 2009), comprising a car chassis with a platform, a mast with a hoist system, hydraulic mast jacks, load limiters, hoist block limiters, winch , outriggers, operator's cab, hydraulic and electrical control systems. At the same time, the rear outriggers contain a metal foundation, and the descent into the working position and the ascent to the transport position of the metal foundation is carried out using the hydraulic installation system.

A well-known installation for repairing oil wells (patent RU No. 11259, IPC Е21В 19/00, published on September 16, 1999), which is closest in technical essence to the claimed device and adopted as a prototype, containing a car chassis, to the frame of which a platform is attached, and installed on platform inclined mast with tackle system, electronic weight indicator and outriggers, hoist block limiter, mast jacks, winch, installation control system, operator’s cab, the winch is hydraulically driven, pumps feeding e hydraulic actuator, connected to the output shaft power take-chassis, and the system control is made by electro one lever.

The problem solved by the creation of a utility model is the insufficient reliability of the units during tripping operations (STR) at the well, the unreliable installation of units at the wellhead and high operating costs.

The task to which the utility model is directed is to create a device with an extended service life and increased reliability of its installation and operation.

The technical result, the achievement of which is directed by a utility model, is to increase the reliability of the lifting unit.

It also improves the reliability of the installation of the unit at the wellhead, the reliability of fixing the inclined mast, reducing operating costs.

The technical result is achieved due to the fact that the self-propelled lifting unit contains a control system consisting of three systems: hydraulic, pneumatic and electrical systems, the hydraulic system being configured to raise and lower the mast, the pneumatic system is configured to control the main winch, and the electrical system in combination with hydraulic and pneumatic systems it is made with the possibility of control when installing the lifting unit in the well and for the production of spu lifting operations.

Reliability of fixing the inclined mast is provided by the auxiliary winch of the extension of the upper mast section.

The inventive device is illustrated in the figures:

in FIG. 1 shows a general view of a lifting unit mounted on a chassis;

in FIG. 2 shows a kinematic diagram of a lifting unit;

in FIG. 3 shows the layout of the lifting unit in hoisting equipment during the STR.

The inventive device (Fig. 1, 2) consists of the following elements:

1 - chassis;

2 - platform;

3 - inclined mast;

4 - mast mast system;

5 - diesel drive;

6 - cardan shaft;

7 - pump gear;

8 - hydraulic pump right;

9 - hydraulic pump left;

10 - main winch hydraulic motor;

11 - main winch with hydraulic drive;

12 - auxiliary winch hydraulic motor;

13 - auxiliary winch to extend the upper section of the mast.

The self-propelled lifting unit with hydraulic winch drive 11 is a self-propelled oilfield machine and mounted on the chassis 1 of a two-axle trailer. The trailer can be automobile or tractor.

A platform 2 is attached to the chassis frame 1, on which an inclined mast 3 with a tackle system 4 and with a hook block lifting limiter, mast lifting jacks, a main winch 11 with a hydraulic drive, hydraulic pumps 8, 9 supplying a hydraulic drive of the winch 11 are mounted.

An inclined mast 3 with a tackle system 4 is mounted on the front and rear legs.

The lifting unit contains a control system consisting of three systems: hydraulic, pneumatic, electrical.

The lifting unit is located at the wellhead as part of the equipment for open source software (Fig. 3), consisting of the following elements:

14 - lifting unit.

15 - work site;

16 - spider key with hydraulic control panel;

17 - stand under the pedestal (tragus);

18 - a ladder;

19 - receiving bridges;

20 - chute receiving bridges;

21 - operator control panel.

The main winch 11 is single-drum, contains a reverse and a pinch roller.

The hydraulic drive of the main winch 11 is made with an oil cooler and is controlled by a hydraulic motor 10 through a planetary gearbox built into the main winch 7.

For braking, the main winch 11 is equipped with a brake valve made hydraulic and disk.

The auxiliary winch 13 of the extension of the upper section of the mast 3 is controlled by a hydraulic motor 12 through a worm gear built into the auxiliary winch 13.

The movement control of the drum of the winch 11 and 13 is carried out using valves. To do this, from the hydraulic pumps 8 and 9 through the control valves to the hydraulic motors 10 and 12, the working fluid is supplied, which then flows to the winch drums 11 and 13.

The selection of power to drive the hydraulic pumps 8 and 9 is carried out from the diesel drive 5 through the pump gear 7.

The output shaft of the diesel drive 5 with the driveshaft 6 is connected to the pump gear 3.

Mast 3 is made telescopic and two-section.

The mast 3 in the transport position is located horizontally above the lifting unit 14 on its front and rear supports, and in the working position - vertically, with a slope of 4 ° from the vertical to the side of the wellhead.

The mast 3 is raised from the transport position to the working position by a hydraulic jack, and the extension of the upper section by the auxiliary winch 13.

The lower part of the mast 3, being the rear support, is rigidly connected with the frame of the lifting unit 14.

The mast 3 of the lifting unit 14 is also equipped with a sound and light alarm, which allows you to safely install and fold it at any time of the day and a limiter for lifting the hook block, ensuring the safety of the STR.

Mast 3 control during STR is performed from a portable operator console.

Installation of the mast 3 in the working position is carried out from the manual control valve.

The control of the lifting unit 14 provides a combination of three systems: hydraulic, pneumatic, electrical.

The hydraulic system of the device provides the following operations:

extension (retraction) of the rear outriggers of the installation of the lifting unit 2;

lifting (lowering) of the mast 3;

raising (lowering) of the upper section of the mast 3;

lifting operations of the main winch 11;

hydraulic wrench operation.

The power supply of the hydraulic system provides the main winch 11.

The oil is supplied by hydraulic pumps 8, 9 through a control valve (controlled by a pneumocylinder) to an adjustable hydraulic motor 10.

The pressure gauge shows the pressure in the control circuit of the main winch 11.

The hydraulic system provides for the operation of the hydraulic key and the exposure of the lifting unit 2.

Raising (lowering) the mast 3 with a hydraulic cylinder is performed by controlling the valve spool.

A control pressure gauge is connected to the control valve. The emergency valve is designed to prevent the mast from falling in the event of a line break.

The brake valve provides a predetermined lowering speed of the mast 3.

The raising (lowering) of the upper section of the mast 3 is carried out by an auxiliary winch 13 with a hydraulic motor 12.

To ensure normal operation, the hydraulic system is charged with VMGZ oil.

The pneumatic system of the device provides the following operations:

spider cylinder control;

automatic locking of the main winch 11, which occurs:

upon triggering of the hoist restriction system;

when the load limit system is triggered.

The pneumatic system in combination with the electrical system can significantly facilitate, simplify and secure the control of the lifting unit 14 as a whole.

Compressed air is supplied to the pneumatic system from the chassis compressor, previously drained by a moisture-oil separator. The moisture-oil separator consists of a pressure regulator, a filter, a desiccant with an adsorbing element, an electric air heater (during operation in the winter season).

A pressure regulator with an adsorber is needed to maintain operating pressure and dry the air from the compressor. The regeneration receiver is designed to automatically purge settled moisture and oil on the absorbent element and filter. The receiver creates an additional supply of compressed air. The quick exhaust pneumatic valve allows you to instantly release air pressure into the atmosphere.

Pneumatic control of the main winch 11 is as follows.

The electropneumatic distributor in the working state of the pneumatic system is constantly energized, which allows you to control (electrically) the availability of the hoist restriction system 4 of the hoist system and the overload protection system.

The main winch 11 is controlled by a follow-up pressure regulator with a manual drive (on the remote operator panel). When the regulator is opened, pressure enters the pneumatic cylinder, thereby switching the valve.

The electrical system of the device in combination with hydraulic and pneumatic systems is designed to control mechanisms when installing the lifting unit 14 in the well, for the production of STR and for lighting the mast 3 and the working platform of the wellhead.

The electrical system is equipped with a hook block lift limiter with automatic shutdown of the main winch drive 11 when the hook block reaches the maximum permissible lift height.

The electrical system is self-healing after the start of lowering the hook block.

The power of the lifting unit 14 is carried out both from the on-board network of the unit, and from an external power source of alternating current voltage of 380 V, 50 Hz, followed by conversion to direct current voltage of 24 V.

Maximum power consumption is:

when powered by a 400 W engine generator;

when powered by an external source of 5400 watts.

In the production of STR, as well as when installing and lowering the mast 3, the power is supplied from the on-board network, and the lighting of the lifting unit 14, mast 3 and the working platform of the mouth can be carried out both from the on-board network and from an external power source.

The pneumatic system is powered by air and the electrical system is supplied with electric energy from a diesel drive 5.

The batteries are powered and recharged with the engine running (moving the unit, working near the well) from the generator or through a transformer from the 220 V network.

The tackle system of the device contains a snap, which is made by a rope with a diameter of 16.5 mm and a length of at least 80 m, wound on a drum. The running end of the hoist rope is attached to the drum of the main winch 11, the other end to the device for attaching the fixed end of the hoist rope located on the right side of the deck of the unit.

The load limiter of the hook block lift is suspended on the fixed branch of the hoist rope, coming from the crown block.

To ensure the stability of the mast during the production of STR, the lifting unit is equipped with a guy system.

The cargo and installation braces of the mast 3, the upper ends of which are attached to the upper parts of the upper and lower sections of the mast 3, respectively, are fastened to the ears welded to the front mast support through the lanyards (screw braces).

Preparing the device for use.

To mount the mast 3, removed during transportation by rail, perform the following operations:

remove the crossbars and remove the fingers from the forks located on the lower belt of the lower mast section, remove the crossbars and fingers with washers from the ears in the heads of the hydraulic jacks;

lifting the mast 3 with a crane, start its forks on the ears of the rear support, insert the removed fingers and fix them with bolts;

lead to the ears located on the 2nd belt of the lower mast section;

install washers on both sides of the spherical plain bearings;

insert the fingers and secure them with bolts;

lower the mast to the front support and fasten on it;

connect the hydraulic jack with high pressure sleeves to a pipeline located on the lower mast section;

connect the pneumatic conduit on the mast with the pneumatic conduit located on the rear support with a hose;

place the hook block in a nest located in the lower part of the upper mast section;

equip the hoist system with a rope, reeling it from the winch drum.

All auxiliary and working movements of the units and mechanisms of the lifting unit are controlled using hydraulic and pneumatic systems.

Placement of the device in the well.

The lifting unit 14 is placed in accordance with the technological scheme of equipment placement on the well (Fig. 3) when performing well repair, while

the lifting unit 14 is fed to the horizontal platform of the well being repaired in reverse so that its longitudinal axis coincides with the axis of the well, and the distance from the axis of the jacks of the rear mast support to the axis of the well is 1100 + 20 mm;

ground the lifting unit 14 with a ground cable to the ground loop;

crimping the hydraulic system;

create pressure in the hydraulic system equal to 16 MPa;

lower the legs of the hydro-leveling support onto the foundation beam using the control valve, ensuring the horizontal position of the unit;

set the front jacks in working position;

center the mast 3 relative to the wellhead;

raise the mast 3;

extend the upper section of the mast 3, and under the action of the springs, all the stops of the upper section of the mast 3 are advanced, and the upper section of the mast 3 lowers to its stops.

Before starting the production of STRs, condensate is released from the moisture separator and all air cylinders of the pneumatic system;

The operation of the hook block lifting limiter is checked, for which a three-fold lifting of the unloaded hook block is made before “operation”, while the main winch 11 is turned off and the brake is applied. In this case, the braking distance must be no more than 1.5 m, the distance from the axis of the crown block to the hook block must be at least 2.5 m;

Then produce open source software.

The inventive device is intended for

mobile movement from well to well with a tractor or car;

installation and dismantling at the well;

carrying out maintenance of wells with a hook load of up to 12 tons;

production of open source software during the ongoing repair of wells;

mechanized screwing and unscrewing of the tubing string and tubing rods using a hydraulic spider key;

well flushing;

SPO with sucker rods d = 16 ... 25 mm, L = 8.0-9.15 m;

carrying out open-ended fire with tubing d = 48 ... 89, L = up to 11 m.

Using for mounting the lifting unit 14 of the chassis 1 of the biaxial trailer allows the mobile transportation of the lifting unit 14 for repair work. The advantage of this chassis 1 is the ability to move multiple units with one tractor. Also, the trailer is more economical in maintenance and has the ability to select a tractor depending on weather conditions.

The lifting unit 14 can be transported by any type of transport suitable for carrying capacity, subject to the conditions and rules applicable to these modes of transport.

When transported by rail or water, the mast 3 is dismantled and secured.

Loading and unloading of the lifting unit 14 should ensure the safety of the unit and eliminate the possibility of damage.

The use of hydraulic, pneumatic and electrical systems in the lifting unit 14 makes it possible to greatly simplify and facilitate the control of its mechanisms.

The utility model allows to increase the stability of the mast 3 of the lifting unit 14 in working condition, while reducing the time for preparatory work during installation and dismantling of the lifting unit 14 at the wellhead.

Claims (17)

1. A self-propelled lifting unit with a hydraulic winch drive mounted on the chassis, to the frame of which a platform is attached, and containing an inclined mast mounted on the platform with a tackle system and a hook block lifting limiter, mast lifting jacks, a main winch with a hydraulic drive, control system, hydraulic pumps feeding the hydraulic drive of the winch, characterized in that the control system consists of hydraulic, pneumatic and electrical systems, and the hydraulic system ying with the possibility of raising and lowering the mast, the pneumatic system is adapted to control the main winch with a hydraulic drive, and electrical system in combination with hydraulic and pneumatic systems is configured to manage the installation of the hoisting machine on the well production and tripping operations. 2. The unit according to claim 1, characterized in that the main winch with a hydraulic drive is single-drum, contains a reverse and a pinch roller. 3. The unit according to claim 1, characterized in that the hydraulic drive of the main winch is made with an oil cooler. 4. The unit according to claim 1, characterized in that the hydraulic drive of the main winch is controlled by a hydraulic motor through a planetary gearbox built into the main winch. 5. The unit according to claim 1, characterized in that the main winch is equipped with a brake valve made of hydraulic and disk. 6. Unit under item 1, characterized in that it contains an auxiliary winch extending the upper section of the mast. 7. The unit according to claim 6, characterized in that the auxiliary winch is controlled by a hydraulic motor through a worm gear built into the auxiliary winch. 8. The unit according to claim 1, characterized in that the power is taken to the drive of the hydraulic pumps from the diesel drive through the pump gearbox. 9. The unit according to claim 1, characterized in that the output shaft of the diesel drive is connected to the pump gear by the driveshaft. 10. The unit according to claim 1, characterized in that the hydraulic pumps supply the working fluid to the hydraulic motors through the control valves. 11. Unit under item 6 or 10, characterized in that the control valves are configured to control the movement of the winch drum. 12. The unit under item 1, characterized in that to ensure the stability of the mast is equipped with a system of guy wires. 13. The unit under item 1, characterized in that the mast is made telescopic and two-section. 14. The assembly according to claim 1, characterized in that the mast is mounted on the front and rear support beams. 15. The unit according to claim 1, characterized in that the lower part of the mast is a rear support and is rigidly connected with the frame of the unit. 16. The unit under item 1, characterized in that the mast is equipped with sound and light alarms. 17. The unit according to claim 1, characterized in that the mast is made with the possibility of its control from a portable operator console.

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