Lubricating system for wells

FIELD: oil and gas industry.

SUBSTANCE: lubricating system for wells consists of lubricator, lubricator substructure and rotation mechanism. Lubricator is designed as tubular housing with guide rollers, the housing base is provided with sealing element. On lubricator substructure there is mounting block fixed with rotation mechanism installed on it being a driving shaft. Attachment facilities for middle part of lubricator tubular housing are installed on the shaft, as well as segment of worm wheel connected to worm screw, which in its turn is connected to device providing rotation of worm screw. Worm screw is designed with narrow angle of spiral line elevation providing mode of worm-and-worm pair self-retention, and rotation axis of worm wheel segment is located perpendicular to rotation axis of worm screw and at a distance from axis of lubricator tubular housing exceeding 0.5 d, but not more than 1.5 d, where d is outer diameter of sealing element of lubricator tubular housing base.

EFFECT: simplifying the structure and its assembly, simplifying operation of lubricating system, improving its reliability.

2 dwg

 

The invention relates to the field of oil and gas production and can be used for lowering or lifting devices, and devices for special purposes in the well, including under excessive pressure gas or liquid.

Known the force feed system for wells, consisting of a lubricator, the support base of the lubricator, and the swivel mechanism is made of two lever arms connected to the worm screw (RF Patent 2279541, the patentee is Society with limited liability "Nadymgazprom", publ. 10.07.2006).

The disadvantages of the known technical solutions are insecurity complex, due to the uneven distribution of mass of the lubricator, the inability to use the lubricator long length and large diameter, the bulkiness of the swivel mechanism, as well as the structural complexity of the complex.

The technical result, which directed the present invention is to simplify the design and Assembly, which is carried out directly at the installation location before beginning work in wells, simplifying the operation of the lubricator complex, and increase its reliability.

The technical result of the invention is achieved due to the fact that the force feed system for wells, status of the t of the lubricator, the support base of the lubricator and the rotary mechanism, and the lubricator is made in the form of a tubular casing with guide rollers at the base of which is a sealing element, for supporting the base of the lubricator mounted to the mounting rack, which is equipped with a turning mechanism, a leading shaft attached to it by means of fixation of the middle part of the tubular body of the lubricator, as well as a segment of a worm wheel, paired with the worm screw, which, in turn, is associated with means enabling rotation of the worm screw, when the worm screw is made with a small elevation angle of helix, providing a mode-locking worm gear pair, and the axis of rotation of the worm wheel segment is perpendicular to the axis of rotation of the worm screw, and at a distance from the axis of the tubular body of the lubricator, greater than 0.5 d, but not more than 1.5 d, where d is the outer diameter of the sealing element of the Foundation of the tubular body of the lubricator.

The essence of the invention is illustrated by drawings, where figure 1 shows the force feed system for wells, and figure 2 - rotary mechanism lubrication of the complex.

The force feed system for wells consists of a lubricator 1, the support base Assembly 2 and the rotary mechanism 3. Lubr the indicator 1 is made in the form of a tubular body 4 with the upper and lower guiding rollers for the wire 5 and 6, respectively.

The tubular body 4 lubricator system is designed to accommodate depth of the equipment prior to its descent and before removing it from the well, placing the upper and lower guide rollers 5 and 6 for the wire, as well as devices for input wire 7. The tubular body 4 may be made of a single tube or multiple separate sections, connected to each other with quick couplings or clutches (not shown). The input device wire 7 lubricator complex is intended for entry of the wire into the tubular body 4, and for seals. The upper guide roller 5 is intended for a direction of movement of the wire along the tubular body 4 in the input device of the wire 7. The lower guide roller 6 is intended for a direction of movement of the wire from the winch (not shown) to the upper roller 5 and reduce bending effort on the tubular body 4 of the wire tension during the ascent.

The upper part of the tubular body 4 ends with thread or flange (not shown) for connection with the device input wire 7 in the tubular body 4 lubricator complex.

The lower part of the tubular body 4 is made in the form of a connecting element 8 (flange or threaded connection). At the base of the tubular body is a sealing element is 9 in the form of soft or hard strip. Flange or screw connections are used to connect the tubular body 4 with a support base of the lubricator 2.

Supporting the base of the lubricator 2 is a mounting coil, consisting of a coupling element in the form of upper and lower flanges 10 and 11, respectively, or a threaded connection (not shown). The support base Assembly 2 is intended for installation lubricator complex on the flange of the buffer x-Mas tree valves (not shown) and the mounting rack 12. The lower flange 10 of the mounting of the coil on the side surface has a hole for fitting and ball valve for connection showing the gauge and periodic, if necessary, bleed the gas from the cavity of the tubular housing 4 lubricator complex in operation.

The mounting bracket 12 serves as a support for rotation of the tubular body 4 lubricator complex (tipping tubular casing lubricator complex from a vertical to a horizontal position and Vice versa). The mounting bracket 12 is a structure made of metal profile, and has a bottom base (not shown)that is attached to the lower flange 10 or to the flange of the buffer valve (not shown), and an upper support platform for mounting of the swing mechanism 3.

The rotary mechanism 3 pre is scheduled for fastening the tubular body 4 and the deviation of its relatively vertical position. The rotary mechanism 3 is a drive shaft 13, which is fixed to fixation means 17 middle part of the tubular body of the lubricator, for example metal plates attached to them by the collar and the segment worm wheel 14 is mated with the worm screw 15, which, in turn, is associated with the tool 16, which provides the rotation of the worm screw. As a means 16 providing rotation of the worm screw may be used to arm or adjusting the key switch.

To use a lubricator remove the buffer from the buffer valves wellhead equipment of the well (not shown). Assemble blocks lubricator complex (lubricator, supporting the base of the lubricator and the mounting bracket with swivel mechanism). Install mounting the coil on the flange of the buffer valve. On the lower flange 10 of the coil mounting set mounting rack 12. At the top of the mounting rack 12 fixed pivot mechanism 3. Installing a tubular housing 4 flange (coupling element 8) on the top flange 11 of the mounting of the coil. Fix the tubular body 4 in the clip (the fixation device 17) of the rotary mechanism 3. Translate the tubular body 4 in an inclined or horizontal position, convenient for subsequent work by turning the handle or key of Cresotech the first rotary mechanism. Fixed on the tubular body 4 of the upper and lower guide rollers 5 and 6. Put the wire from the winch first through the bottom 6, and then through the upper guide rollers 5.

The end of the wire passed through the hole of the input device, the wire 7. Deep unit (not shown) is placed in the tubular body 4. The inclination of the tubular housing 4 by turning the handle or ratcheting wrench through the worm pair (worm screw worm wheel segment). Install the flange of the tubular body for mounting the coil. Using the winch lowered the instrument in the borehole to the desired depth. Upon completion of work, raise the device from the well. Block buffer gate valve, gate valve at the side strings of x-Mas tree, release the gas through the ball valve (not shown). Sever the flange connection of the tubular housing and the mounting of the coil. Translate the tubular body 4 in the horizontal position using the rotary mechanism 3 after disconnecting the flange 8 of the tubular housing from the mounting of the coil. Take a deep unit from the tubular housing. Disconnect the wire from the device, remove the device from the tubular body 4. Produce disassembly lubrication complex to the blocks in the reverse order of installation.

We offer the force feed complex is structurally simple. The implementation of the s complex in the form of separate blocks (lubricator, supporting the base of the lubricator and the mounting bracket with swivel mechanism) simplifies its Assembly, which can be done directly at the installation location before beginning work in wells, which, in turn, will simplify the operation of the lubricator complex.

Also the simplification of the operation of the system is through the use of a swivel mechanism to effect the worm gear, which allows us to reject the lubricator in a position convenient for placing devices, putting minimal stress on the tool that provides the rotation of the worm screw turning mechanism, for example, on the handle.

Thus the performance of the worm screw with a small elevation angle of the helical line (not more than 4.5), which provides the mode-locking worm pairs, allows the rotary mechanism to fix the lubricator in the deflected position without the use of additional mechanical clamps, which also simplifies the construction of the lubricator complex.

The use of the claimed lubricator complex with swivel mechanism, which unlike the prototype captures tubular diameter in its middle part, provides a balance relative to the center of gravity of the lubricator, which, in turn, will allow the use of the lubricator of any length and any diameter also the location of the axis of the tubular body of the lubricator at a distance from the axis of rotation of the segment worm wheel turning mechanism, greater than 0.5 d, but not more than 1.5 d, where d is the outer diameter of the sealing element of the Foundation of the tubular body of the lubricator, allows you to translate the tubular body of the lubricator in a vertical position, not touching this extreme part of the sealing element mounting the coil and smoothly without clearance to install the flange of the tubular body for mounting the coil. In the result, there is no need for bulky rotary mechanism that facilitates the construction of a lubricator complex, and more reliable lubrication of the complex.

The force feed system for wells, consisting of a lubricator, the support base of the lubricator and the rotary mechanism, wherein the lubricator is made in the form of a tubular casing with guide rollers at the base of which is a sealing element, for supporting the base of the lubricator mounted to the mounting rack, which is equipped with a turning mechanism, a leading shaft attached to it by means of fixation of the middle part of the tubular body of the lubricator, as well as a segment of a worm wheel, paired with the worm screw, which, in turn, the SOP is Agen tool, ensure the rotation of the worm screw, when the worm screw is made with a small elevation angle of helix, providing a mode-locking worm gear pair, and the axis of rotation of the worm wheel segment is perpendicular to the axis of rotation of the worm screw, and at a distance from the axis of the tubular casing lubricator is greater than 0.5 d, but not more than 1.5 d, where d is the outer diameter of the sealing element of the Foundation of the tubular body of the lubricator.



 

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