Rotary table for pipe string

FIELD: oil and gas industry.

SUBSTANCE: invention relates to rotary drilling, namely to a pipe string suspension facility. The rotary table is fitted with the pipe string suspension facility and contains the rotary ring installed with a possibility of rotation around the central axis of the rotary table, meanwhile the rotary table is supported by the contact surface located perpendicular to the rotary table central axis. The rotary ring is formed by two or more sections of the ring, each of which is connected with the system containing the bearing housing section implemented with a possibility of rotation with reference to the base section. On the base contact surface of the bearing housing section the bearing housing groove is made. The corresponding base groove is made on the opposite surface of the bearing housing in the base section. The named grooves form curvilinear guide for a rolling body and have the centre of curvature coinciding with the central axis of the rotary table, the rolling diameter of the rolling body exceeds the total depth of the named grooves. In section of the bearing housing the channel is made which connects the ends of the groove of the bearing housing which contains transitional parts, each of which is fitted with a guiding part fitting into a base groove.

EFFECT: improvement of reliability of the device operation is provided.

1 cl, 5 dwg

 

The technical field to which the invention relates

Described rotary table provided with means for hanging tubing and containing a rotating ring mounted rotatably around the Central axis of the turntable, which, more specifically, is made of two or more ring sections, each of which are connected to a system containing a section of a bearing housing mounted rotatably relative to the base section, the base of the contact surface sections of the bearing housing is made a groove, and a corresponding base groove is formed on the opposite contact surface of the bearing in the base section, and wherein said groove has a curvature center coinciding with the Central axis of the rotary table, the rolling diameter of the rolling element exceeds the total depth of the specified groove, wherein the body section of the bearing is formed with a channel connecting the ends of the groove of the bearing housing.

The level of technology

When using a rotary table for suspension and rotation of the column of pipes, in particular a drill string, when the rotary table is usually a drive element of the drilling machine is installed in the derrick or the like is movable so that the drilling machine is moved vertically with the deepening of drill number�, are put into the well, there is a need to release the rotary table, to be able to take the drilling machine from the column pipe and move it vertically to prepare for the other operation. This especially refers to the process of continuous drilling, where multiple drilling machines interact to build and rotation of casing string. Such a division is difficult to ensure a sufficiently powerful and functional collapsible support a rotary table on a folding base, if the turntable needs to withstand the weight of the column of pipes, amounting to several hundred tons.

# 323330 known driven pipe wrench comprising two pivoting relative to each other of the housing halves, wherein the halves of the housing can be rotated between closed active open position and an inactive position, and a radially split drive ring, is provided with a gripper with hydraulic control, directed towards the Central axis of the drive Tong, is located in the halves of the casing, with drive ring rests on the drive motor and connected to rotate the drive ring around a specified axis and wherein the drive ring is provided with at least one stopper, which can connect the parts of the drive ring together with the ability to lock.

Races�the freight of the invention

Object of the invention is to eliminate or reduce at least one of the drawbacks of the prior art or at least provide a useful alternative to the prior art.

This problem is solved with the help of the device are presented below in this description and the attached claims.

According to the invention provided with a rotary table, comprising two essentially identical sections of the turntable, each of which is attached to the frame pivotally supported on an axis of rotation parallel to the Central axis, which passes through the center hole in the rotary table. When the turntable is connected sections turntable combine to form a ring-shaped body, and when the rotary table is open, is formed an opening extending from the center of the turntable to its periphery, said hole being suitable for radial displacement of the pipe relative to the center hole of the turntable at the entrance to the rotary table and exits.

Each section of the rotary table includes a base section, an annular section, and also section of the bearing housing. On the end surface sections of the bearing housing facing the base of the section, provided one or more horizontal, is provided with a continuous chamfer groove, ima�ing an arcuate shape and the center of curvature, which coincides with the Central hole of the rotary table, and passing through the bulk of the sector formed by the annular section. Similarly, the corresponding one or more of rolling guides formed on opposite surfaces in the base of the section. Together two contrasting form a groove guide bearings for the rolling elements, usually for the ball, wherein said guide roller has a profile corresponding to the shape of the rolling elements. Similarly, one or more of the respective return channels made in the body section of the bearing and each end connected with said grooves when the first and second vertical arcuate transition channel so that the grooves of the transition channel and the return channel form a continuous loop of the guide roller, designed for the passage of a number of rolling elements, when they when rotating section of the bearing housing relative to the base section rolled through the opposite grooves of the base section and the bearing housing as long as there is a groove and go into the first transition channel in the return channel and back into the groove through the second transition channel, wherein the rolling elements during the return movement pushed forward as needed following them rolling elements in� the time of their displacement from the groove in the return channel. The number of rolling guides depends on the size of the rolling elements and the magnitude of the load, which must withstand the rotary table.

More specifically, the invention relates to a rotary table device, provided with means for hanging tubing, wherein said rotary table comprises a rotary ring mounted rotatably around the Central axis of the turntable, and is characterized in that the slewing ring consists of two or more sections, each of which are connected to a system containing a section of the bearing housing, made with the possibility of rotation relative to the base section, the base of the contact surface sections of the bearing housing is made a groove of the bearing housing, and a corresponding base groove is formed on the opposite contact surface of the bearing in the base section, and wherein said groove forms an arcuate guide for the rolling elements, the specified guide rail has a center of curvature coinciding with the Central axis of the turntable, the diameter of the rolling element exceeds the total depth of the specified groove and in section of the bearing housing is formed with a channel connecting the ends of the groove of the bearing housing.

This channel may have a guide part that sticks down into the base groove. Thanks to it, body rolling�I easier going into a return channel.

Body rolling can be performed in the form of a ball. With the same size of the rolling element can be used regardless of the distance between the grooves and the Central axis of the rotary table.

At least one annular section and the corresponding base section may form a section of a rotary table, which can move between a first position in which the turntable is connected in the radial direction, and a second position in which the turntable is formed by a radial hole for tubing.

Each annular section can have its own drive coupled with it. In this section of the ring during rotation experience more uniform load.

The rotary table may contain two sections, installed in the chassis with the possibility of rotation. Because of this, it is easy to obtain the radial hole of casing string.

Section turntable can rely on the contact surface, mounted in a frame perpendicular to the Central axis of the rotary table. Thus, the supporting function is provided, essentially, a static element, so the elements forming the hole in the sections of the rotary table, and performing the functions of a circuit of the table can be made smaller.

The element that is in contact with the contact surface of the frame and/or frame is supplied lagomorph sliding shoes, in the absence of load on the rotary table provide a gap between the contact surface and the opposite end surface of the base section, each sliding Shoe is mounted with the spring loading in the recess in the specified element, or in a frame, and protrudes from the end surface of the element or, respectively, from the contact surface.

Section of the bearing housing can be placed over the base section. Alternative this section of the bearing housing may be located under the basic section. This provides more flexibility, in particular when the rotary table is equipped with systems with multiple bearings, for example, in order to make it possible to switch to manual control of the movement of a column of tubes during the rotation.

Brief description of the drawings

The following is an example description of a preferred embodiment with reference to the accompanying drawings, in which:

Fig.1 is a top view of the turntable according to the invention in an open position;

Fig.2 is a top view of the turntable in the closed position;

Fig.3 is a side view of the turntable in the closed position;

Fig.4 is a vertical sectional view along the axis IV-IV of figure 1 of part of the section of the bearing housing and the base section on an enlarged scale; and

Fig.5 - side view of the rotary table� in the closed position, wherein the bearing housing is mounted under the base.

The implementation of the invention

In the drawings, reference number 1 designates a turntable, which is attached to the frame 2 and is based on her. Frame 2 is attached to a vertical drilling rig 3, usually protruding from the drilling platform (not shown) in the drilling rig (not shown). Frame 2 is connected to the tower 3 by means of a plurality of connectors 22 and can be moved in the vertical direction along the surfaces 31 of the slide provided on the tower. The turntable 1 is provided with an axial bore 18 for tubing that is intended for transmission of 4 columns of pipes, essentially, of a known type.

The rotary table 1 contains, in the first example embodiment (see in particular, figures 1 and 2) two sections 1A, 1b of the rotary table, each of which is provided with a base section 11 attached to the frame by a hinge 114, sections 1A, 1b of the rotary table can be rotated around the axes 114a of rotation with a rotary pneumatic or hydraulic cylinder 115. The base section can be moved in the direction of the axis 114a of the turn.

The base section 11 rests on the contact surface 21 that is located perpendicular to the axis 114a of the turn. A number of sliding shoes 116 installed in the recesses 118 in the base section 11, however, they are popped from the end surface 112 in �the direction of the contact surface 21 by means of springs 117. In the unloaded position of the sections 1A, 1b of the rotary table are based on a frame 2 by means of sliding shoes 116, wherein the end surface 112 of the base section 11 is lifted from the contact surface 21 due to the sliding shoes 116 and a spring 117. When sections 1A, 1b of the rotary table is loaded, the end surface 112 of the base section 11 is based on an underlying contact surface 21, as sliding shoes 116 retract into corresponding recesses 118.

The contact surface 21 is provided with a recess 211 (see figure 1) extending from outer edge inward to the center of the turntable and forming together with sections 1A, 1b of the rotary table radial bore 17 for column pipes, when sections 1A, 1b of the rotary table away from each other.

The contact surface 111 of the bearing is a recess in the upper portion of the base section 11 and is limited to the side wall 119 and a Central opening (not shown), which is part of the axial hole 18 for tubing. The surface 111 of the bearing base section 11 of the two sections 1A, 1b of the rotary plate and the adjacent side wall 119, if they are brought together, form a cylindrical recess, in which are placed two semi-cylindrical section 13 of the bearing housing radially based on many supporting bearings 136, located at the sides�x wall 119.

Section 13 of the housing of the bearing has an annular shape and being brought together, they form part of the axial hole 18 to the column pipe in the rotary table 1.

Section 13 of the bearing housing attached to each of the ring sections 12A and 12b, respectively, which, when brought together, form a cylindrical rotary ring 12 which forms part of the axial hole 18 to the column pipe in the rotary table 1.

Each section 12A, 12b of the ring is provided with a recess 122 that includes a wedge support 15 and the portion 16 of the V-belt.

In a base contact surface 131 on the sections 13 of the bearing housing, a plurality of parallel arcuate grooves 132, concentric with the Central axis of the sections 13 of the bearing housing. The ends of grooves 132A 132 are located at a distance from the radial side edges of the base contact surfaces 131. Parallel to the grooves 132 section 13 of the bearing housing passes the return flow channel 133, which has a cross section larger than the cross section of the body 14 of the roller, each end of which connects with said groove 132 through an arcuate transition portion 134, which is in the ends of the respective grooves 132.

On contact surface 111 of the bearing base section 11 is provided by the grooves 113, complementary to the grooves 132 on the opposite base of the contact surfaces 131 with�functions 13 of the bearing housing. The grooves are radially spaced side edges of the contact surfaces 111 of the bearing.

The guide part 135 protrudes down into the groove 113 of the base section 11, forming a continuation of the periphery of the transition portion 134.

The grooves 113, 132 form a guide roller for a number of bodies 14 rolling, the total depth of the grooves is smaller than the diameters of the bodies 14 of rolling. When several bodies 14 are rolling in their respective grooves 113, 132, section 13 of the bearing housing has a clearance with the base section 11 and the roll body 14 rolling when you reach the end of the groove 113 in the base section 11 is sent to the return channel 133 via a transition portion 134. Body 14 rolling describe a continuous line in the grooves 113, 132 and the return channel 133 when moving in the grooves 113, 132 during rotation of the section 13 of the bearing housing relative to the base section 11, and then they fall into the guide portion 135 and sent to the transition portion 134 and the return flow channel 133, and they are pushed continuously arriving new bodies 14 rolling.

Each section 1A, 1b of the rotary table 19 is provided with a drive rotation, which is meshed with section 121 of the gear, made in the sections 12A, 12b of the ring.

In occlusion (see figure 2) of section 13 of the bearing housing forming a cylindrical body, can continuously rotate, because the base of the CE�tion 11 form a continuous annular grooves 113, the body 14 of the rolling head into the return flow channel 133 through the transition portion 134 after they are included in the guide part 135, projecting into the base groove 113.

When the rotary table 1 need to unlock in order to withdraw from column 4 of the pipe sections 12A, 12b of the ring rotated to the initial position where they are flush with their respective base sections 11, thus, sections 1A, 1b of the rotary table to form essentially a planar interface, as shown in figure 1. It is obvious that the rotary table 1 according to the invention must be provided with a device which prevents displacement of the sections 1A, 1b of the turntable relative to each other until such time as sections 12A, 12b of the ring are in their original positions.

The above description applies to the bodies 14 of the rolling element has a spherical shape, however, this does not preclude the application of the rolling elements of other forms, in particular, conical rollers having a cone angle corresponding to the radius of the guide 113, 132 rolling.

Sliding shoes 116 is shown mounted in the base section 11, however, it is obvious that installing them in the frame 2, where the sliding shoes 116 will act up towards the base sections 11, will provide the same elastic support, as described above.

It is obvious that the surface 21, 112, which moves�Xia sliding shoes, can be provided with a replaceable sliding guides (not shown).

In the example described above, in the embodiment shown the ring formed by two cylindrical sections 12A, 12b with corresponding base sections 11, which are mounted rotatably around the vertical axis 114a of rotation, however, the radial bore 17 for column pipes can be obtained in other ways, for example, by closing and opening the C-shaped ring section (not shown) to form a complete annular section (not shown) by means of its displacement in the radial direction to the hole formed by the C-shaped annular partition, and then from the branch hole at the periphery of the C-shaped ring section.

In the example implementation described above with reference to figures 1-4, section 13 of the bearing housing installed on the base section 11. However, this does not exclude the possibility to swap these elements so that the base section 11 relied on section 13 of the bearing housing, as shown in figure 5. In this embodiment, the implementation of these sliding shoes 116 are mounted in the recesses 118 on the support surface 137 provided in the sections 13 of the bearing housing and facing the contact surface 21 of the frame 2.

For specialists in the art it is also obvious that the rotary table 1 and according to�finding can be equipped with a second bearing system (not shown), which is mirrored with respect to the system described above for the rotary table 1 and related, to column 4 of the pipe will exert a force acting downward in the axial direction when the pipe string you want to move deeper into the borehole when lowering the pipe under pressure.

1. Rotary table (1), provided with means (15, 16, 122) for hanging column (4) pipes and containing a rotary ring (12) mounted rotatably around the Central axis of the turntable (1) and the turntable (1) rests on the contact surface (21) located perpendicular to the Central axis (114a) of the turntable, characterized in that the rotary ring (12) is formed by two or more sections (12A, 12b) rings, each of which are connected to a system containing section (13) the bearing housing is arranged to rotate relative to the base section (11) and the base contact surface (131) of section (13) of the bearing housing is made a groove (132) of the bearing housing and the base of the groove (113) formed on opposite surfaces (111) of the bearing housing to the base section (11), and these grooves (113, 132) to form a curved guide body (14) of the rolling element, the said grooves (113, 132) have a curvature center coinciding with the Central axis of the rotary table (1), the diameter of the lid is�Oia body (14) of the rolling element is greater than the total depth of these grooves (113, 132), section (13) of the bearing housing is formed with a channel (133) connecting the ends (132A) of the groove (132) of the bearing housing, and channels (133) contain transitional portion (134), each of which is provided with a guide part (135), which is the base of the groove (113).

2. The device according to claim 1, characterized in that the body of the rolling element has a spherical shape.

3. The device according to claim 1, characterized in that at least one ring section (12A, 12b) and the corresponding base section (11) forming section (1A, 1b) of a rotary table adapted to move between a first position in which the turntable (1) is connected in the radial direction, and a second position in which the turntable (1) is formed by the radial bore (17) for column pipes.

4. The device according to claim 1, characterized in that each of the ring sections (12A, 12b) is connected to the actuator (19) which is meshed with the toothed section of the wheel (121) that is installed in sections (12A, 12b) of the ring.

5. The device according to claim 1, characterized in that the turntable (1) comprises two sections (1A, 1b) rotary table installed in a frame (2) rotatably.

6. The device according to claim 5, characterized in that the sections (1A, 1b) of the turntable based on the contact surface (21), performed in the frame (2) perpendicular to the Central axis of the rotary table (1).

7. The device according to claim 6, featured�occurring, what base section (11) or section (13) of the bearing housing adjacent to the contact surface (21) of the frame (2), and/or a frame (2) provided with a number of elastic sliding shoes (116), with no load on the turntable (1) provide a gap between the contact surface (21) and an opposite end surface (112, 137) of the base section (11), each sliding Shoe (116) set with spring loading in the recess (118) in the specified element (11, 13) or in a frame (2) and protrudes from the end surface (112, 137) of the element (11, 13) or from the contact surface (21), respectively.

8. The device according to claim 1, characterized in that the section (13) of the bearing housing installed on the base section (11).

9. The device according to claim 1, characterized in that the section (13) of the bearing housing is installed under the base section (11).



 

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2 cl, 3 dwg

FIELD: mechanical engineering, particularly drilling string and casing pipe connection equipment.

SUBSTANCE: method involves stopping one pipe and rotating another pipe for screwing and unscrewing of above pipes with the use of hydraulic drive and braking system to transmit differently directed torques with the same data along with reactive moment reduction by drive and braking system. Device comprises two coaxial power tongs. Each power tong includes body and pipe squeezing mechanism. The power tongs have common drive including high-speed reducer and differential block kinematically connected one to another. Differential block comprises body with outer and inner toothed crowns, planet carrier with three satellites installed on the carrier, the first tong arranged in body, driven gear kinematically connected to planet carrier and the second tong installed in the body and adapted to cooperate with corresponding gears of pipe squeezing mechanisms. Pipe squeezing mechanism of the first tong is fixedly secured to braking pulley of braking system installed on the first tong body. The braking system comprises four pressing shoes and cylindrical case with hydraulic cylinder for shoe pressing arranged so that cylindrical case may rotate with pulley and pipe squeezing mechanism of the first tong relative pipe squeezing mechanism axis. The cylindrical case is additionally provided with two rests. One rest is fixedly connected with cylindrical case and cooperates with two hydraulic cylinders, which are adapted for thread tightening/unfastening. Another rest is connected with cylindrical case by hinged axis and also cooperates with two other hydraulic cylinders, adapted for thread tightening/unfastening, which provides elimination of reverse reaction and increase of pipe squeezing mechanism torque and locking moment.

EFFECT: possibility to use one drive provided with differential gear to perform screwing/unscrewing operations.

2 cl, 2 dwg

FIELD: mechanical engineering, particularly means for connecting or disconnecting pipe couplings or joints.

SUBSTANCE: pipe wrench comprises body with openable flaps and locking mechanism, releasing rotor with jaws, braking means to provide automatic pipe clamping, hydraulic motor and tooth gears with satellites. The rotor comprises central and two side sectors. One side sector end has threaded orifice to receive regulator, which adjusts mutual sector location. The regulator is made as spherical threaded thrust having spherical part cooperating with end part of central rotor sector. Rotor-satellite spacing setting device, which specifies space between rotor and satellite axes is installed in wrench body. The spacing setting device is made as three cylindrical fingers cooperating with basic rotor surface and installed in threaded orifices formed in wrench body along longitudinal axis thereof. The fingers are also arranged in each openable flap at an angle to longitudinal axis.

EFFECT: increased operational reliability.

5 dwg

Tubular key // 2293837

FIELD: tubular keys.

SUBSTANCE: tubular key contains jaws with through grooves of "dovetail" type on end surface, replacement dies mounted therein, holders. On side surfaces of jaws, grooves of "dovetail" type are made, into which sliders are inserted for holding replacement dies along end surfaces. Through apertures are made in jaws, wherein spring-loaded holders for fastening sliders are inserted.

EFFECT: increased reliability of assembly for holding replacement dies of tubular key.

5 dwg

Machine spanner // 2295624

FIELD: deep drilling and maintenance of oil and gas wells.

SUBSTANCE: machine spanner contains greater and lesser jaws, jointly connected to handle-lever, which is provided with swivels for holding traction and insurance cables, holding toothed dies on aforementioned jaws, mounted in die holders, latch, jointly connected to larger jaw and adapted for interaction with lesser jaw. Larger jaw is made in form of one- or multi-layered (multi-row) packet of flexible resilient elements, on which a row of die holders is located. A packet of flexible resilient elements is made in form of highly durable ribbons or ropes, provided with eyes for connection of jaws to each other by means of fingers, and also with slit and handle-lever.

EFFECT: increased comfort of operation, decreased hazard of injury and increased lifetime.

4 cl, 7 dwg

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