CN110723480A

CN110723480A - Drilling platform conveyor

Info

Publication number: CN110723480A
Application number: CN201911297623.9A
Authority: CN
Inventors: 杨洪超
Original assignee: Dongying Shenglan Petroleum Technology Development Co Ltd
Current assignee: Dongying Shenglan Petroleum Technology Development Co Ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-01-24
Anticipated expiration: 2039-12-17
Also published as: CN110723480B

Abstract

The invention discloses a drilling platform conveying device in the technical field of drilling platforms, which comprises a drilling column conveying part and a drilling column transferring part, wherein a rotating motor is fixedly arranged in a front group fixed base, a second infrared sensor is fixedly arranged on the side wall of a rear group fixed base, a spiral blade is fixedly connected with the side wall of a conveying rod, the drilling column transferring part comprises a catwalk base, the top of the catwalk base is rotatably connected with a transferring plate, the bottom of the catwalk base is rotatably connected with a lifting hydraulic cylinder, the movable end of the lifting hydraulic cylinder is rotatably connected with the transferring plate, the top of the transferring plate is fixedly provided with a transferring motor, the middle of the transferring base is rotatably connected with a clamping column, clamping claws are fixedly connected around the clamping column, the movable end of a propelling hydraulic cylinder is fixedly connected with fastening claws, and the top of the catwalk base is rotatably connected, the labor is saved, the efficiency is improved, and a slope way does not need to be fixed.

Description

Drilling platform conveyor

Technical Field

The invention relates to the technical field of drilling platforms, in particular to a drilling platform conveying device.

Background

Drilling requires transporting a drill string between the surface and an oil rig platform. At present, the method for conveying the drill string between the ground and the platform of the oil drilling rig is mainly a generally-adopted manual method, adopts the hoisting equipment of a derrick and a fixed slope slideway to convey the drill string, the method is carried out in a mode that a worker manually operates and is matched with a winch to pull and drag or a slope fixed slideway is utilized, a conveyed drill string is lifted to a drilling platform along the fixed slope slideway by utilizing a set of mechanical equipment and then is connected with the drill string to be conveyed, the drill string is placed in a moving V-shaped groove, the front end of the V-shaped groove moves along the fixed slope slideway, the rear end of the V-shaped groove is lifted by the mechanical equipment, the drill string placed in the V-shaped groove is lifted to a certain position along with the V-shaped groove, then a special mechanism in the V-shaped groove pushes the drill stem to the relative position of the wellhead, the equipment is complex, a slope slideway needs to be fixed, the manual method is low in efficiency and high in labor intensity, and meanwhile, the safety production is influenced.

Based on the above, the invention designs a conveying device of a drilling platform to solve the problems.

Disclosure of Invention

The present invention is directed to a conveying device for a drilling platform, which solves the above problems.

In order to achieve the purpose, the invention provides the following technical scheme:

a drilling platform conveying device comprises a drilling string conveying part, a drilling string transferring part and a master controller, wherein the drilling string conveying part comprises a front group fixed base, a rear group fixed base and a conveying rod, a rotating motor is fixedly installed inside the front group fixed base, a second infrared sensor is fixedly installed on the side wall of the rear group fixed base, one end of the conveying rod is fixedly connected with the output end of the rotating motor, the other end of the conveying rod is rotatably connected with the rear group fixed base, spiral blades are fixedly connected with the side wall of the conveying rod, a drilling string is placed between the spiral blades, the drilling string transferring part comprises a catwalk base, a rotary table is fixedly connected to the top of the catwalk base, a transfer plate is rotatably connected to the middle of the rotary table, a lifting hydraulic cylinder is rotatably connected to the bottom of the catwalk base, the movable end of the lifting hydraulic cylinder is rotatably connected with the transfer, fixed mounting has the transportation motor in the transportation base, it is connected with the centre gripping post to rotate in the middle of the transportation base, transportation motor output and centre gripping post fixed connection, centre gripping post fixedly connected with gripper jaw all around, sliding connection has fastening claw in the gripper jaw, fixed mounting has impulse hydraulic cylinder in the gripper jaw, impulse hydraulic cylinder's expansion end fixedly connected with fastening claw, catwalk base top rotates and is connected with and plays to rise hook and rotating hook pneumatic cylinder, rotating hook pneumatic cylinder expansion end rotates with to rise the hook and is connected.

Preferably, the front group of fixed bases, the rear group of fixed bases and the conveying rods are fixedly provided with a left group and a right group, the rotating directions of the conveying rods of the left group are opposite to the rotating directions of the conveying rods of the right group, the rotating directions of the helical blades of the left group are opposite to the rotating directions of the helical blades of the right group, and the helical blades have a pitch larger than the diameter of a conveyed drill string.

Preferably, No. two infrared sensor electricity is connected with total controller, total controller electricity is connected with the relay that rotates the motor and transports the relay of motor, total controller is the singlechip.

Preferably, the top of the catwalk base is fixedly connected with a cross frame plate, and the side wall of the catwalk base is provided with lightening holes.

Preferably, catwalk base top fixedly connected with extends the platform, extend bench top fixedly connected with hook housing, the hook housing intermediate rotation is connected with and rises to rise the hook.

Preferably, the bottom of the transfer plate is fixedly connected with a connecting rotary table, and the lifting hydraulic cylinder is rotatably connected with the connecting rotary table.

Preferably, the propelling hydraulic cylinders are divided into four groups, and each group of propelling hydraulic cylinders corresponds to one group of fastening claws.

Preferably, it all is connected gradually energy storage ware and hydrovalve to play to rise pneumatic cylinder, swivel hook pneumatic cylinder and every group propulsion pneumatic cylinder, the hydrovalve has connected gradually filter, hydraulic pump and oil tank, the total controller is connected with each hydrovalve electricity.

Preferably, the outer wall of the clamping column is fixedly connected with a square column, the four walls of the square column are fixedly connected with clamping claws, and the inner diameter of each clamping claw is larger than the diameter of the drill string.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the drill column is placed in the pitch interval of the spiral blade, the rotating motor is operated to drive the conveying rod and the spiral blade to rotate, the drill column moves to the tail end of the conveying rod, the rotating hook hydraulic cylinder starts a working stroke, the movable end of the rotating hook hydraulic cylinder extends out to rotatably lift the lifting hook to hook the drill column, the drill column rolls downwards on the lifting hook to enter the clamping claw, the lifting hook reversely rotates to return to the original position, then the main controller delays to start the rotating motor, the rotating motor conveys a second drill column to the tail end of the conveying rod to complete a conveying stroke, and each conveying stroke takes a signal sent by the infrared sensor II as a time starting point, so that the stroke accumulated error is reduced, the conveying accuracy is improved, the manual conveying is avoided, the potential safety hazard is reduced.

2. The master controller uses the signal sent by the second infrared sensor as a time starting point to delay and start the electromagnetic hydraulic valve of the first group of propulsion hydraulic cylinders, the movable ends of the first group of propulsion hydraulic cylinders extend out to enable the fastening claws to extend out of the clamping claws from the interior of the clamping claws, the drill string is clamped between the upper fastening claw and the lower fastening claw, the clamping of the first group of clamping claws is completed, the clamping stroke is one clamping stroke, the transfer motor is switched on after the clamping stroke is completed, the transfer motor rotates 90 degrees and then stops, the second group of clamping claws are switched, the rotation switching stroke is the rotation switching stroke, and the length of the clamping stroke plus the length of the rotation switching. Accomplish the centre gripping of other several groups in proper order, then switch to first group gripper jaw, the complete rotatory a week of transportation motor, accomplish whole material loading stroke, then the switch-on plays to rise the hydrovalve of pneumatic cylinder, the board that will transport is rotatory to be risen, accomplish transporting of drilling string, a set of activation time before the start of propelling movement pneumatic cylinder at every turn is the starting point, reduce the accumulative total error, the material loading is accurate, and once can go up many drilling strings, the drilling string transit time has been saved, compare the last drilling string raise the efficiency once, the degree of automation has been improved, do not need fixed ramp.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic top view of the present invention;

FIG. 2 is a schematic bottom view of the present invention;

FIG. 3 is a schematic side view of the corner structure of the present invention;

FIG. 4 is a schematic diagram illustrating comparison of the duration of the duty cycle of the present invention;

FIG. 5 is a schematic representation of a drill string conveyance operation of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1-front group fixed pedestal, 2-rear group fixed pedestal, 3-conveying rod, 4-second infrared sensor, 5-helical blade, 7-drill column, 8-catwalk pedestal, 9-rotary table, 10-transfer plate, 11-lifting hydraulic cylinder, 12-transfer pedestal, 13-clamping column, 14-clamping claw, 15-fastening claw, 16-lifting hook, 17-rotary hook hydraulic cylinder, 18-cross frame plate, 19-extension table, 20-hook frame 20, 21-connection rotary table and 22-square column.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution:

a drilling platform conveying device comprises a drill string conveying part, a drill string transferring part and a master controller, wherein the drill string conveying part comprises a front group fixed base 1, a rear group fixed base 2 and a conveying rod 3, a rotating motor is fixedly installed inside the front group fixed base 1, a second infrared sensor 4 is fixedly installed on the side wall of the rear group fixed base 2, one end of the conveying rod 3 is fixedly connected with the output end of the rotating motor, the other end of the conveying rod is rotatably connected with the rear group fixed base 2, the side wall of the conveying rod 3 is fixedly connected with a spiral blade 5, a drill string 7 is placed between the spiral blades 5, the drill string transferring part comprises a catwalk base 8, the top of the catwalk base 8 is fixedly connected with a rotary table 9, the middle of the rotary table 9 is rotatably connected with a transfer plate 10, the bottom of the catwalk base 8 is rotatably connected with a lifting hydraulic cylinder 11, the movable end of the, fixed mounting has the transportation motor in transporting base 12, transport base 12 middle rotation is connected with the grip post 13, transport motor output and grip post 13 fixed connection, grip post 13 fixedly connected with gripper jaw 14 all around, sliding connection has fastening jaw 15 in the gripper jaw 14, fixed mounting has propulsion cylinder in the gripper jaw 14, propulsion cylinder's expansion end fixedly connected with fastening

jaw

15, 8 tops of catwalk base are rotated and are connected with lifting hook 16 and rotating hook pneumatic cylinder 17, rotating hook pneumatic cylinder 17 expansion end rotates with lifting hook 16 and is connected.

Wherein, preceding group fixed baseplate 1, back group fixed baseplate 2 and conveying pole 3 are fixed to be equipped with the left side a set of and the right side a set of, and the turning direction of a set of conveying pole 3 and the right side a set of conveying pole 3 on the left side is opposite, and the turning direction of a set of helical blade 5 and a set of helical blade 5 on the right side is opposite, and the pitch of helical blade 5 is greater than the 7 diameters of drilling string that carry.

8 top fixedly connected with horizontal shelf board 18 of catwalk base, the lightening hole has been seted up to 8 lateral walls of catwalk base. 8 top fixedly connected with of catwalk base extend platform 19, extend 19 top fixedly connected with hook brackets 20 of platform, rotate in the middle of hook brackets 20 and be connected with to rise hook 16. The bottom of the transfer plate 10 is fixedly connected with a connecting rotary table 21, and the lifting hydraulic cylinder 11 is rotatably connected with the connecting rotary table 21.

The hydraulic propulsion cylinders are divided into four groups, and each group of hydraulic propulsion cylinders corresponds to one group of fastening claws 15. The outer wall of the clamping column 13 is fixedly connected with a square column 22, four walls of the square column 22 are fixedly connected with clamping claws 14, and the inner diameter of each clamping claw 14 is larger than the diameter of the drill string 7.

No. two infrared sensor 4 electricity is connected with total controller, and total controller electricity is connected with the relay of rotating the motor and transports the relay of motor, and total controller is the singlechip. The lifting hydraulic cylinder 11, the rotating hook hydraulic cylinder 17 and each group of the pushing hydraulic cylinders are sequentially connected with an energy accumulator and a hydraulic valve, the hydraulic valve is sequentially connected with a filter, a hydraulic pump and an oil tank, and the master controller is electrically connected with the hydraulic valves.

One specific application of this embodiment is: according to the invention, the drill column 7 is placed in the pitch interval of the spiral blade 5, when the drill column is at the initial position, the lifting hook 16 is positioned below the conveying rod 3, then the master controller is manually started, the master controller connects the rotary motor and the hydraulic pump, the rotary motor operates to drive the conveying rod 3 and the spiral blade 5 to rotate, the spiral blade 5 rotates to drive the drill column 7 on the conveying rod 3 to move forwards, when the drill column 7 moves to the tail end of the conveying rod 3, the drill column 7 covers the infrared sensor 4 II, the infrared sensor 4 II transmits a signal to the master controller, the master controller enables the rotary motor to stop operating and connects the electromagnetic hydraulic valve of the rotary hook hydraulic cylinder 17 by disconnecting the relay of the rotary motor, so that the rotary hook hydraulic cylinder 17 starts the working stroke, the movable end of the rotary motor extends out to enable the lifting hook 16 to rotate and hook the drill column 7, and then the rotary hook hydraulic cylinder 17 stops, at the moment, the end part of a lifting hook 16 is slightly tilted, the tail part of the lifting hook 16 is horizontal to the inner bottom wall of a clamping jaw 14, then a drill column 7 rolls downwards on the lifting hook 16 to enter the clamping jaw 14, the working stroke is long, a master controller uses a signal sent by a second infrared sensor 4 as a time starting point to delay and start a rotating hook hydraulic cylinder 17 to start a reset stroke, the delay time is long, the rotating hook hydraulic cylinder 17 retracts to a movable end, so that the lifting hook 16 reversely rotates to return to the original position, then the master controller uses a signal sent by the second infrared sensor 4 as a time starting point to delay and start a rotating motor, the delay time is the sum of the working stroke long and the reset stroke long of the rotating hook hydraulic cylinder 17, the rotating motor conveys a second drill column 7 to the tail end of a conveying rod 3 to complete a conveying stroke, each conveying stroke uses a signal sent by the second infrared sensor 4 as a time starting, improve the conveying accuracy, remove artifical the transporting from, reduce the potential safety hazard, use manpower sparingly, raise the efficiency.

The master controller uses the signal sent by the second infrared sensor 4 as a time starting point to delay and start the electromagnetic hydraulic valve of the first group of propulsion hydraulic cylinders, the delay time is the working stroke duration of the rotating hook hydraulic cylinder 17, which is a waiting feeding stroke, the movable end of the first group of propulsion hydraulic cylinders extends out to extend the fastening claw 15 from the inside of the clamping claw 14, the drill stem 7 is clamped between the upper fastening claw 15 and the lower fastening claw 15, thereby fixing the drill stem 7, stopping the action after the first group of the pushing hydraulic cylinders reach a certain load, completing the clamping of the first group of the clamping claws 14, which is a clamping stroke, after the clamping stroke is finished, the master controller is connected with the transferring motor by connecting a relay of the transferring motor, so that the transferring motor rotates by 90 degrees and then stops, the transferring motor is a stepping motor, so that the transfer motor drives the clamping column 13 to rotate 90 degrees to be switched to the second group of clamping claws 14, which is a rotation switching stroke, and the clamping stroke duration plus the rotation switching stroke duration is equal to the reset stroke duration. The second group of gripper jaws 14 is started by time delay with the electromagnetic valve of the first group of hydraulic thrust cylinders receiving a signal as a time starting point, the second group of hydraulic thrust cylinders of the second group of gripper jaws 14 is started by time delay, the time delay is the working stroke time of the rotating hook hydraulic cylinder 17, after the drill string 7 is clamped by the same principle, the second group of hydraulic thrust cylinders stops acting, the master controller switches the transfer motor to rotate by 90 degrees by switching on the relay of the transfer motor, and switches to the third group of gripper jaws 14, the third group starts the third group of hydraulic thrust cylinders of the third group of gripper jaws 14 by time delay with the electromagnetic valve of the second group of hydraulic thrust cylinders receiving a signal as a time starting point, after the clamping is completed, the master controller switches the transfer motor to rotate by 90 degrees by switching on the relay of the transfer motor, and switches to the fourth group of gripper jaws 14, and the fourth group of hydraulic thrust cylinders of the fourth group of gripper jaws 14 is started by time, after clamping is completed, the main controller is connected with the transfer motor through a relay of the transfer motor to enable the transfer motor to rotate 90 degrees, the first group of clamping claws 14 is switched, the transfer motor rotates for a circle completely to complete the whole feeding stroke, then the lifting hydraulic cylinder 11 is connected with a hydraulic valve of the lifting hydraulic cylinder 11 through the main controller by taking the complete rotation circle of the transfer motor as a signal, the movable end of the lifting hydraulic cylinder 11 extends out of the hydraulic cylinder, the transfer plate 10 is rotated and lifted until the lifting hydraulic cylinder 11 reaches the maximum stroke and is maintained at the maximum stroke, at the moment, the transfer plate 10 is in a vertical state to complete conveying of the drill strings 7, the starting time of the previous group is taken as a starting point when the hydraulic cylinder is started each time, accumulated errors are reduced, feeding is accurate, the previous group has problems, the next group cannot continue to operate, a plurality of drill strings 7 can be loaded at one time, the transferring time of the drill, the automation degree is improved, and a slope ramp does not need to be fixed.

During unloading, the drill stem 7 is fixed on a lifting hook of a drilling well, then the first group of pushing hydraulic cylinders are loosened by the manual control switch, then the drilling well is hoisted to use the drill stem 7, then the manual control switch controls the transfer motor to rotate for 90 degrees and is switched to the second group of clamping jaws 14, then the manual control switch loosens the second group of pushing hydraulic cylinders, after all the drill stems 7 are unloaded by analogy in sequence, the transfer motor completely rotates for a circle to return to the original position, the manual control switch controls the lifting hydraulic cylinders 11 to retract the movable ends of the lifting hydraulic cylinders into the original position, the transfer plate 10 is driven to return to the original position. The drill stem 7 is used with a plurality of uncertain factors, and manual control is more flexible and convenient.

According to the invention, the drill column 7 is placed in the pitch interval of the spiral blade 5, the rotating motor is operated to drive the conveying rod 3 and the spiral blade 5 to rotate, the drill column 7 moves to the tail end of the conveying rod 3, the rotating hook hydraulic cylinder 17 starts a working stroke, the movable end of the rotating hook hydraulic cylinder extends out to rotatably lift the lifting hook 16 to hook the drill column 7, the drill column 7 rolls downwards on the lifting hook 16 to enter the clamping claw 14, the lifting hook 16 reversely rotates to return to the original position, then the master controller delays to start the rotating motor, the rotating motor conveys the second drill column 7 to the tail end of the conveying rod 3 to complete a conveying stroke, and each conveying stroke takes a signal sent by the second infrared sensor 4 as a time starting point, so that stroke accumulated errors are reduced, the conveying accuracy is improved, manual conveying is avoided, potential safety hazards are reduced, manpower is. The master controller uses a signal sent by the second infrared sensor 4 as a time starting point to delay and start the electromagnetic hydraulic valve of the first group of propulsion hydraulic cylinders, the movable end of the first group of propulsion hydraulic cylinders extends out to stretch out the fastening claw 15 from the inside of the clamping claw 14, the drill string 7 is clamped between the upper fastening claw 15 and the lower fastening claw 15, the clamping of the first group of clamping claw 14 is completed, the clamping stroke is one clamping stroke, the transfer motor is switched after the clamping stroke is completed, the transfer motor rotates 90 degrees and then stops, the second group of clamping claws 14 are switched to be a rotary switching stroke, the clamping stroke length and the rotary switching stroke length are equal to the reset stroke length. Accomplish the centre gripping of other several groups in proper order, then switch to first group gripper jaw 14, the complete rotatory a week of transportation motor, accomplish whole material loading stroke, then play to rise pneumatic cylinder 11 and use the complete rotatory a week of transportation motor as the signal and put through the hydrovalve that plays to rise pneumatic cylinder 11 through master controller, the rotatory lift of board 10 will be transported, accomplish transporting of drilling string 7, a set of activation time before the start-up of propelling cylinder at every turn is the starting point, reduce the accumulative total error, the material loading is accurate, and many drilling strings 7 can be gone up once, drilling string 7 transit time has been saved, compare drilling string 7 improvement efficiency once, the degree of automation has been improved, need not fix the ramp.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a drilling platform conveyor, includes drill string transportation part, drill string transportation part and master controller which characterized in that: the drill string conveying part comprises a front group fixed base (1), a rear group fixed base (2) and a conveying rod (3), a rotating motor is fixedly installed inside the front group fixed base (1), a second infrared sensor (4) is fixedly installed on the side wall of the rear group fixed base (2), one end of the conveying rod (3) is rotatably connected with the rear group fixed base (2) together with the other end fixedly connected with the output end of the rotating motor, spiral blades (5) are fixedly connected with the side wall of the conveying rod (3), a drill string (7) is placed between the spiral blades (5), the drill string transferring part comprises a catwalk base (8), a rotary table (9) is fixedly connected with the top of the catwalk base (8), a transfer plate (10) is rotatably connected in the middle of the rotary table (9), and a lifting hydraulic cylinder (11) is rotatably connected with the bottom of the catwalk base (8), play to rise pneumatic cylinder (11) expansion end and transport board (10) and rotate and be connected, transport board (10) top fixedly connected with transports base (12), transport base (12) internal fixation and install the transportation motor, it is connected with grip post (13) to rotate in the middle of base (12) to transport, transport motor output and grip post (13) fixed connection, fixedly connected with gripper jaw (14) all around gripper jaw (13), sliding connection has fastening jaw (15) in gripper jaw (14), fixed mounting has propulsion pneumatic cylinder in gripper jaw (14), propulsion pneumatic cylinder's expansion end fixedly connected with fastening jaw (15), catwalk base (8) top is rotated and is connected with to rise to hook (16) and commentaries on classics hook pneumatic cylinder (17), commentaries on classics hook pneumatic cylinder (17) expansion end and play to rise to hook (16) and rotate and be connected.

2. A rig conveyor as claimed in claim 1, wherein: the front group of fixed bases (1), the rear group of fixed bases (2) and the conveying rods (3) are fixedly provided with a left group and a right group, the rotating directions of the left group of conveying rods (3) and the right group of conveying rods (3) are opposite, the rotating directions of the left group of spiral blades (5) and the right group of spiral blades (5) are opposite, and the screw pitch of the spiral blades (5) is larger than the diameter of a conveyed drill string (7).

3. A rig conveyor as claimed in claim 1, wherein: no. two infrared sensor (4) electricity is connected with total controller, total controller electricity is connected with the relay that rotates the motor and transports the relay of motor, total controller is the singlechip.

4. A rig conveyor as claimed in claim 1, wherein: the top of the catwalk base (8) is fixedly connected with a cross frame plate (18), and lightening holes are formed in the side wall of the catwalk base (8).

5. A rig conveyor as claimed in claim 1, wherein: catwalk base (8) top fixedly connected with extends platform (19), extend platform (19) top fixedly connected with hook frame (20), it has lifting hook (16) to rotate in the middle of hook frame (20).

6. A rig conveyor as claimed in claim 1, wherein: the transfer plate (10) is fixedly connected with a connecting rotary table (21) at the bottom, and the lifting hydraulic cylinder (11) is rotatably connected with the connecting rotary table (21).

7. A rig conveyor as claimed in claim 1, wherein: the propelling hydraulic cylinders are divided into four groups, and each group of propelling hydraulic cylinders corresponds to one group of fastening claws (15).

8. A rig conveyor as claimed in claim 1, wherein: it all is connected gradually energy storage ware and hydrovalve to play to rise pneumatic cylinder (11), swivel hook pneumatic cylinder (17) and every group propulsion pneumatic cylinder, the hydrovalve has connected gradually filter, hydraulic pump and oil tank, the hydrovalve is the solenoid valve, total controller is connected with each hydrovalve electricity.

9. A rig conveyor as claimed in claim 1, wherein: the outer wall of the clamping column (13) is fixedly connected with a square column (22), four walls of the square column (22) are fixedly connected with clamping claws (14), and the inner diameter of each clamping claw (14) is larger than the diameter of the drill string (7).