Rotary table for petroleum drilling

Abstract

The utility model belongs to the technical field of petroleum drilling equipment, and particularly relates to a rotary table for petroleum drilling. The rotary table is arranged in the cast-weld base and connected with the cast-weld base through a bearing; wherein a plurality of clamping positions which are arranged in a circular array are arranged on the peripheral side of the rotary table; the input shaft is arranged in the cast-weld base and connected with a cast-weld base bearing, and one end of the input shaft is meshed with a rotary table gear; when the input shaft rotates, the input shaft is suitable for driving the rotary table to rotate synchronously. The two groups of limiting assemblies are symmetrically arranged in the cast-weld base; each limiting assembly comprises a limiting block hinged with the cast-weld base; according to the rotary table for petroleum drilling, through the matched design of the limiting blocks and the clamping positions, the stability of the rotary table in the stop state is ensured, accidental rotation caused by external force is prevented, safety accidents caused by accidental rotation of a drill rod are avoided, and the safety of drilling operation is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of petroleum drilling equipment, concretely relates to a rotary table for petroleum drilling. BACKGROUND

[0002] The rotary table for drilling is actually a rotating disc, which can transmit the torque and gravity of the drill rod, so that the drill rod can smoothly enter the wellhead. The power of the rotary table is derived from the motor, and the power is transmitted to the input shaft through the chain wheel or the shaft coupling, and then transmitted to the small bevel gear at the other end of the input shaft. Through the bevel gear transmission and speed reduction, the power is transmitted to the rotary table to drive the rotary table to rotate. The rotary table drives the square drill rod to rotate through the square tile and square compensator, and then drives the drill rod string and drill bit to rotate. Since the drill rod can axially slide, the drill rod can be rotated and fed at the same time. When handling downhole accidents, drilling or casing, the drill rod string or casing string can be clamped on the drilling platform for collaborative operation.

[0003] During the operation of petroleum drilling, when replacing the drill bit, handling downhole accidents, drilling or casing, etc., the rotary table needs to be stopped. The traditional rotary table stopping method mainly relies on the motor, small bevel gear and gear ring. Due to the complex drilling operation environment, when the drill bit accidentally rotates slightly, the strong torque will forcibly drive the rotary table to rotate, which not only easily breaks the teeth of the gear ring at the time of stopping, but also may damage the motor. This unstable stopping method not only affects the normal operation of drilling, increases the maintenance cost and time, but also may cause more serious safety accidents, threatening the life safety of the operator, and also brings great inconvenience and economic loss to the oil exploitation work.

[0004] Therefore, in order to solve the above problems, it is necessary to design a rotary table for petroleum drilling. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing a rotary table for petroleum drilling to solve the technical problems mentioned in the background art.

[0006] In order to solve the above technical problems, the utility model provides a rotary table for petroleum drilling, which comprises:

[0007] A cast-weld base;

[0008] A rotary table is arranged inside the cast-weld base and connected with the cast-weld base bearing; wherein

[0009] The rotary table is provided with a plurality of clamping positions arranged in a circular array on the side;

[0010] An input shaft is arranged in the cast-weld base and connected with the cast-weld base bearing, and one end is engaged with the rotary table gear; wherein

[0011] When the input shaft rotates, it is suitable to drive the rotary table to rotate synchronously;

[0012] The two sets of limiting components symmetrically arranged in the cast-weld base comprise: limiting blocks hinged to the cast-weld base;

[0013] When it is necessary to limit the rotation of the rotating table, the two limiting blocks are adapted to be respectively clamped into the corresponding clamping positions on the rotating table to limit the rotation of the rotating table.

[0014] Further, the limiting components further comprise: an L-shaped connecting plate connected to the inner wall of the cast-weld base, a connecting plate hinged to the limiting blocks, and a hinge connected to the connecting plate; wherein

[0015] the limiting blocks are hinged to the L-shaped connecting plate; and

[0016] the hinge is adapted to drive the limiting blocks to be clamped into the corresponding clamping positions on the rotating table through the connecting plate.

[0017] Further, the limiting components further comprise: a limiting plate connected to the L-shaped connecting plate;

[0018] the bottom of the connecting plate is provided with a limiting protrusion;

[0019] the limiting protrusion is adapted to abut against one end of the limiting plate to limit the limiting blocks, the connecting plate and the hinge.

[0020] Further, the cast-weld base comprises: a first placement through portion located in the middle of the cast-weld base; wherein

[0021] the first placement through portion is provided with a ball bearing;

[0022] the rotating table is arranged in the ball bearing and in contact with the top of the ball bearing; and

[0023] the rotating table is adapted to rotate in the ball bearing.

[0024] Further, the first placement through portion is provided with a support portion;

[0025] the first placement through portion is provided with a retaining ring;

[0026] the retaining ring comprises: a circular side lug located at the top of the outer side of the retaining ring, and an inner stepped portion located at the bottom of the inner side of the retaining ring;

[0027] the bottom of the circular side lug is in contact with the support portion;

[0028] the top of the circular side lug is in contact with the ball bearing;

[0029] the inner stepped portion is in contact with the bottom of the rotating table.

[0030] Further, the bottom of the retaining ring is provided with a lower seat ring; wherein

[0031] The lower seat ring is located at the end of the first placement through part; and

[0032] The lower seat ring and the circle side ear are suitable for limiting the position of the check ring.

[0033] Further, the cast-weld base further comprises a second placement through part located at the side of the cast-weld base;

[0034] The outer side of the input shaft is sleeved with a shaft sleeve; wherein

[0035] The shaft sleeve is arranged in the second placement through part; and

[0036] The input shaft is suitable for rotating in the shaft sleeve.

[0037] Further, the input shaft is sleeved with a bevel gear at one side;

[0038] The outer side of the rotary table is sleeved with a big gear ring; wherein

[0039] The big gear ring is located below the clamping position;

[0040] The bevel gear is meshed with the big gear ring.

[0041] Further, the other end of the input shaft is connected with a shaft coupling; wherein

[0042] The shaft coupling is suitable for being connected with the motor.

[0043] Further, the top of the cast-weld base is provided with a top cover; wherein

[0044] The top cover is provided with an avoiding through part and two avoiding parts;

[0045] The top cover is suitable for limiting the rotary table; and

[0046] The avoiding through part is suitable for avoiding the middle part of the rotary table;

[0047] The two avoiding parts are suitable for avoiding the movement of the connecting plate and the hinged piece.

[0048] The beneficial effects of the utility model are:

[0049] (1) the input shaft drives the rotary table to rotate synchronously through gear meshing, the rotary table drives the drill pipe to rotate through the structure of the square tile and the square backup ring, and drilling operation is carried out; when it is needed to stop the rotary table from rotating, the input shaft stops rotating, the rotary table slowly stops under the action of inertia, the limiting block is moved, the limiting block rotates around the hinged point, the limiting block is clamped into the clamping position on the rotary table, and the rotary table is prevented from rotating; through the cooperation design of the limiting block and the clamping position, the stability of the rotary table in the stop state is ensured, accidental rotation caused by external force is prevented, safety accidents caused by accidental rotation of the drill pipe are avoided, and the safety of drilling operation is improved.

[0050] The other features and advantages of the present application will be described in the following description and become apparent from the description, or can be learned from practice of the present application. The objectives and other advantages of the present application can be achieved and obtained by means of the structures particularly pointed out in the description and the accompanying drawings.

[0051] In order to make the above objectives, features and advantages of the present application more apparent, the following preferred embodiments are specifically described, and the accompanying drawings are referred to for detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0052] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0053] Figure 1 is a perspective view of a preferred embodiment of part of the present application Figure One ;

[0054] Figure 2 is a perspective view of a preferred embodiment of part of the present application Figure Two ;

[0055] Figure 3 is an explosion of a preferred embodiment of the whole of the present application Figure One ;

[0056] Figure 4 is an explosion of a preferred embodiment of the whole of the present application Figure Two ;

[0057] Figure 5 is a sectional view of a preferred embodiment of the whole of the present application;

[0058] Figure 6 is a perspective view of a preferred embodiment of part of the present application Figure Three ;

[0059] Figure 7 is a perspective view of a preferred embodiment of the whole of the present application.

[0060] In the drawings:

[0061] Cast welding base 1, first placement through part 101, support part 1011, second placement through part 102;

[0062] Rotary table 2, clamping position 201, input shaft 3;

[0063] Limiting assembly 4, limiting block 401, L-shaped connecting plate 402, connecting plate 403, limiting protrusion 4031, hinged piece 404, limiting plate 405;

[0064] Ball bearing 5, retainer 6, circle side ear 601, inner step portion 602;

[0065] Lower seat ring 7, shaft sleeve 8, bevel gear 9, large gear ring 10, shaft coupling 11;

[0066] Top cover 12, avoiding through portion 1201, avoiding portion 1202. DETAILED DESCRIPTION

[0067] To make the purpose, technical scheme and advantages of the embodiments of the utility model more clear, the technical scheme of the utility model will be described clearly and completely below in conjunction with the drawings, and obviously, the described embodiments are a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model. Embodiment 1

[0068] As Figures 1 to 7 Indicated, this embodiment provides a kind of rotary table for petroleum drilling, including:

[0069] Cast weld base 1;Rotary table 2, is set inside cast weld base 1, with cast weld base 1 bearing connection;Wherein the circumferential side of rotary table 2 is equipped with several circular array setting engagement sites 201;Input shaft 3, is set in cast weld base 1, with cast weld base 1 bearing connection, one end is engaged with rotary table 2 gear;Wherein when the input shaft 3 rotates, it is suitable to drive rotary table 2 synchronous rotation;Two groups of symmetrically arranged limiting assembly 4 in cast weld base 1, it includes: with the hinge of cast weld base 1 limiting block 401;When needing to limit the rotation of rotary table 2, two limiting blocks 401 are suitable for being respectively clamped into corresponding engagement sites 201 on rotary table 2, to limit the rotation of rotary table 2;Wherein by circular array setting several engagement sites 201, so that rotary table 2 can be rotated to multiple angles and be matched with limiting block 401, realize rotation limit.

[0070] In the embodiment, the input shaft 3 drives the rotary table 2 to rotate synchronously through gear engagement, the rotary table 2 drives the drill pipe to rotate through the structure such as square tile and square compensator, and drilling operation is performed; when it is needed to stop the rotary table 2 from rotating, the input shaft 3 stops rotating, the rotary table 2 slowly stops under the action of inertia, the limiting block 401 is moved, the limiting block 401 is rotated around the hinge point, the limiting block 401 is clamped into the clamping position 201 on the rotary table 2, and the rotary table 2 is prevented from rotating; through the cooperation design of the limiting block 401 and the clamping position 201, the stability of the rotary table 2 in the stopped state is ensured, the accidental rotation caused by external force is prevented, the safety accident caused by the accidental rotation of the drill pipe is avoided, and the safety of drilling operation is improved.

[0071] The limiting assembly 4 further comprises an L-shaped connecting plate 402 connected with the inner wall of the cast-weld base 1, a connecting plate 403 hinged with the limiting block 401, and a hinge 404 connected with the connecting plate 403; wherein the limiting block 401 is hinged with the L-shaped connecting plate 402; and the hinge 404 is adapted to clamp the limiting block 401 into the corresponding clamping position 201 on the rotary table 2 through the connecting plate 403.

[0072] In the embodiment, when it is needed to stop the rotary table 2 from rotating, the hinge 404 is pushed to drive the connecting plate 403 to move, the movement of the connecting plate 403 causes the limiting block 401 to rotate around the hinge point of the L-shaped connecting plate 402, the limiting block 401 is rotated to the clamping position 201 and clamped therein, and the rotation limiting of the rotary table 2 is realized; when it is needed to restore the rotation of the rotary table 2, the hinge 404 is reversely operated to reversely drive the connecting plate 403 to move, the reverse movement of the connecting plate 403 causes the limiting block 401 to reversely rotate around the hinge point, the limiting block 401 is released from the clamping position 201, and the rotary table 2 restores the rotation ability.

[0073] The limiting assembly 4 further comprises a limiting plate 405 connected with the L-shaped connecting plate 402; the bottom of the connecting plate 403 is provided with a limiting protrusion 4031; the limiting protrusion 4031 is adapted to abut against one end of the limiting plate 405 to limit the limiting block 401, the connecting plate 403 and the hinge 404; wherein the limiting plate 405 and the limiting protrusion 4031 at the bottom of the connecting plate 403 are arranged to prevent the limiting block 401 from accidentally rotating or loosening under the action of external force.

[0074] The cast-weld base 1 comprises a first placement through portion 101 located in the middle of the cast-weld base 1; wherein the first placement through portion 101 is provided with a ball bearing 5; the rotary table 2 is arranged in the ball bearing 5 and in contact with the top of the ball bearing 5; and the rotary table 2 is adapted to rotate in the ball bearing 5; wherein the ball bearing 5 is arranged to provide stable support for the rotary table 2 and enable the cast-weld base 1 to rotate smoothly.

[0075] The first placement pass part 101 is internally provided with a support part 1011; the first placement pass part 101 is internally provided with a check ring 6; the check ring 6 comprises: a circle side ear 601 located at the top of the outer side of the check ring 6 and an inner step part 602 located at the bottom of the inner side of the check ring 6; the bottom of the circle side ear 601 is in contact with the support part 1011; the top of the circle side ear 601 is in contact with the ball bearing 5; the inner step part 602 is in contact with the bottom of the rotary table 2; wherein the support part 1011 is arranged to ensure that the check ring 6 can be stably installed in the first placement pass part 101 and prevent the check ring 6 from moving downward; the inner step part 602 is arranged to support the rotary table 2.

[0076] The bottom of the check ring 6 is provided with a lower seat ring 7; wherein the lower seat ring 7 is located at the end of the first placement pass part 101; and the lower seat ring 7 and the circle side ear 601 are adapted to limit the check ring 6; the lower seat ring 7 is arranged to prevent the check ring 6 from moving upward.

[0077] The cast-weld base 1 further comprises: a second placement pass part 102 located at the side of the cast-weld base 1; the outer side of the input shaft 3 is sleeved with a shaft sleeve 8; wherein the shaft sleeve 8 is arranged in the second placement pass part 102; and the input shaft 3 is adapted to rotate in the shaft sleeve 8; the second placement pass part 102 is arranged to ensure that the shaft sleeve 8 can be stably installed in the cast-weld base 1; wherein the shaft sleeve 8 is arranged to reduce the friction between the input shaft 3 and the cast-weld base 1.

[0078] One side of the input shaft 3 is sleeved with a bevel gear 9; the outer side of the rotary table 2 is sleeved with a large gear ring 10; wherein the large gear ring 10 is located below the clamping position 201; the bevel gear 9 is in gear meshing with the large gear ring 10; wherein the bevel gear 9 and the large gear ring 10 are arranged to facilitate the input shaft 3 to drive the rotary table 2 to rotate; at the same time, the rotary table 2 can also transmit larger torque and rotational speed to meet the needs of drilling operations.

[0079] The other end of the input shaft 3 is connected with a shaft coupling 11; wherein the shaft coupling 11 is adapted to be connected with a motor; the shaft coupling 11 is arranged to facilitate the transmission of power from the motor to the input shaft 3.

[0080] The top of the cast-weld base 1 is provided with a top cover 12; wherein the top cover 12 is provided with an avoiding through part 1201 and two avoiding parts 1202; the top cover 12 is suitable for limiting the rotary table 2; and the avoiding through part 1201 is suitable for avoiding the middle part of the rotary table 2; and the two avoiding parts 1202 are suitable for avoiding the movement of the connecting plate 403 and the hinged part 404; wherein the top cover 12 and the avoiding through part 1201 are arranged, so that the rotary table 2 is limited, and the rotary table 2 is prevented from moving upwards; and the avoiding parts 1202 are arranged, so that the hinged part 404 is conveniently connected with other components, and the movement of the connecting plate 403 and the hinged part 404 is conveniently avoided.

[0081] The various devices (parts without specific structure) selected in the application are all general standard parts or parts known to those skilled in the art, and their structures and principles can be known by the skilled person through a technical manual or through a conventional experimental method.

[0082] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0083] In the description of the present application, it should be pointed out that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0084] Based on the above ideal embodiments according to the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the contents in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A rotary table for oil drilling, characterized in that, include: Cast-welded base (1); The turntable (2) is set inside the cast and welded base (1) and is connected to the bearing of the cast and welded base (1); in The turntable (2) is provided with several circular array of locking positions (201) around its periphery. The input shaft (3) is located inside the cast-welded base (1) and connected to the bearing of the cast-welded base (1). One end of the shaft meshes with the gear of the turntable (2). When the input shaft (3) rotates, it is suitable for driving the turntable (2) to rotate synchronously; Two sets of limiting components (4) are symmetrically arranged in the cast and welded base (1), including: a limiting block (401) hinged to the cast and welded base (1). When it is necessary to restrict the rotation of the turntable (2), the two limiting blocks (401) are adapted to be respectively engaged in the corresponding engagement positions (201) on the turntable (2) to limit the rotation of the turntable (2).

2. The rotary table for oil drilling as described in claim 1, characterized in that, The limiting component (4) further includes: an L-shaped connecting plate (402) connected to the inner wall of the cast-welded base (1), a connecting plate (403) hinged to the limiting block (401), and a hinge member (404) connected to the connecting plate (403); wherein The limiting block (401) is hinged to the L-shaped connecting plate (402); and The hinge (404) is adapted to drive the limiting block (401) to engage in the corresponding engagement position (201) on the turntable (2) via the connecting plate (403).

3. The rotary table for oil drilling as described in claim 2, characterized in that, The limiting component (4) further includes: a limiting plate (405) connected to the L-shaped connecting plate (402); The bottom of the connecting plate (403) is provided with a limiting protrusion (4031). The limiting protrusion (4031) is adapted to abut against one end of the limiting plate (405) to limit the limiting block (401), the connecting plate (403) and the hinge (404).

4. A rotary table for oil drilling as described in claim 3, characterized in that, The cast-welded base (1) includes: a first placement passage (101) located in the middle of the cast-welded base (1); wherein The first placement passage (101) is provided with a ball bearing (5); The turntable (2) is disposed inside the ball bearing (5) and is in contact with the top of the ball bearing (5); and The turntable (2) is adapted to rotate within the ball bearing (5).

5. A rotary table for oil drilling as described in claim 4, characterized in that, The first placement passage (101) is provided with a support (1011). A retaining ring (6) is provided inside the first placement passage (101); The retaining ring (6) includes: a circular side ear (601) located at the top of the outer side of the retaining ring (6) and an inner step portion (602) located at the bottom of the inner side of the retaining ring (6). The bottom of the circular side ear (601) is in contact with the support (1011); The top of the circular side lug (601) is in contact with the ball bearing (5); The inner step (602) is in contact with the bottom of the turntable (2).

6. A rotary table for oil drilling as described in claim 5, characterized in that, The bottom of the retaining ring (6) is provided with a lower seat ring (7); wherein The lower seat ring (7) is located at the end of the first placement passage (101); and The lower seat ring (7) and the circular side lug (601) are adapted to limit the stop ring (6).

7. A rotary table for oil drilling as described in claim 6, characterized in that, The cast-welded base (1) further includes: a second placement passage (102) located on the side of the cast-welded base (1); A bushing (8) is fitted on the outer side of the input shaft (3); wherein The bushing (8) is disposed within the second placement passage (102); and The input shaft (3) is adapted to rotate within the bushing (8).

8. A rotary table for oil drilling as described in claim 7, characterized in that, A bevel gear (9) is fitted on one side of the input shaft (3); A large gear ring (10) is fitted on the outer side of the turntable (2); wherein The large gear ring (10) is located below the engagement position (201); The bevel gear (9) meshes with the large gear ring (10).

9. A rotary table for oil drilling as described in claim 8, characterized in that, The other end of the input shaft (3) is connected to a coupling (11); wherein The coupling (11) is adapted to be connected to a motor.

10. A rotary table for oil drilling as described in claim 9, characterized in that, The top of the cast-welded base (1) is provided with a top cover (12); wherein The top cover (12) is provided with a clearance passage (1201) and two clearance parts (1202). The top cover (12) is adapted to limit the turntable (2); and The clearance passage (1201) is adapted to avoid the middle of the turntable (2); The two clearance parts (1202) are adapted to move and clear the connecting plate (403) and the hinge (404).

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