Batch conveying lifting power catwalk and methods for sending and dropping a drill string

Abstract

This invention discloses a batch conveying and lifting power catwalk and a method for feeding and ejecting drill bits. The catwalk includes a base and a ramp hinged to one end. Lifting cylinders and supports are hinged at intervals on the catwalk base between it and the ramp. The free end of the lifting cylinder is hinged to the support, and the free end of the support is hinged to a drill bit that overlaps with the ramp. The drill bit includes a V-groove structure drill frame I. A vertically retractable separation mechanism is provided at the bottom of the groove. Vertically retractable separation stops are provided on the inclined surfaces on both sides of the groove bottom. A small trolley extending into the groove bottom slides along the length of the drill frame I. A kick-out mechanism for rolling out the drill bit is provided inside the drill frame I. This invention can roll in three drill bits at once and separate them within the drill bit, improving the drill bit loading efficiency. It changes the traditional method of conveying one drill bit at a time, allowing up to three drill bits to be conveyed at once, reducing the number of conveying operations, significantly shortening the conveying cycle, and improving operational efficiency.

Description

Technical Field

[0001] This invention belongs to the field of oil drilling and development technology, specifically relating to batch delivery lifting-type power catwalks. This invention also relates to methods for feeding and ejecting drill bits using batch delivery lifting-type power catwalks. Background Technology

[0002] Over the past decade, automated equipment has continuously developed, and automated drilling rigs have become the mainstream. Powered catwalks are now widely used on automated drilling rigs, serving to transport the drilling string bidirectionally between the surface storage area and the drilling platform. The entire process requires no human intervention, greatly reducing the labor intensity of drilling workers and lowering operational risks. With the implementation of policies such as energy conservation, emission reduction, and green environmental protection, conventional single-string powered catwalks can no longer meet the energy-saving and consumption-reducing operational needs of oilfields. The development of powered catwalks that can transport multiple (three or more) strings at a time is an inevitable trend in catwalk development in the coming years.

[0003] In response to the low efficiency of existing powered catwalks, some domestic manufacturers have gradually begun related research and launched powered catwalks that can transport three tubing strings at a time. Some manufacturers have adopted a single-string rolling method, in which a single tubing string rolls into the V-groove of the drill string and is stored in a suitable position using sorting and other mechanisms before the second and third strings are rolled in. This operation does not involve the separation of multiple tubing strings and the mechanism is relatively simple. However, because it is a single-string rolling method, the efficiency of loading the tubing string into the V-groove of the drill string is low, which affects the efficiency of the next transport cycle. Summary of the Invention

[0004] The purpose of this invention is to provide a batch conveying lifting powered cat walkway, which solves the problem of low conveying efficiency of existing powered cat walkways.

[0005] Another objective of this invention is to provide a method for feeding and throwing drills in a batch conveying lifting-type power catwalk.

[0006] The first technical solution adopted in this invention is: a batch conveying lifting power catwalk, including a catwalk base and a ramp hinged above one end. Lifting cylinders and supports located between the catwalk base and the ramp are hinged at intervals. The free end of the lifting cylinder is hinged to the support frame. The free end of the support is hinged to a drill string whose front end overlaps the ramp. The drill string includes a drill string frame I with its tail end hinged to the support. The cross section of the drill string I along the width direction is a V-shaped groove. The bottom of the groove of the drill string I is provided with a vertically telescopic separation mechanism. The inclined surfaces on both sides of the bottom of the groove are provided with vertically telescopic separation stop pins. A small trolley with its bottom extending into the bottom of the groove is slidably fitted on the drill string I along the length direction. A kick-out mechanism for rolling out the drill string is provided inside the drill string I.

[0007] The first technical solution of the present invention is further characterized in that, The drill string consists of drill feed frame II and drill feed frame I, which are hinged together at the front and rear. The front end of drill feed frame II is attached to the ramp, and a folding cylinder is hinged together between the sides of drill feed frame II and drill feed frame I.

[0008] The separation mechanism is arranged at intervals of no less than two sets along the length of the drill feed frame I. Each set of separation mechanism includes two separation plates that are staggered front and back. The upper surface of each separation plate is a V-shaped structure that is flush with the bottom of the drill feed frame I. The two separation plates extend to the top of the drill feed frame I and are hinged thereto on the side that is far away from each other. A single-sided separation cylinder is hinged to the bottom of the two separation plates on the side that is far away from each other. The top of the separation stop pin on each side of the bottom of the groove is located outside the free end of the opposite separation plate.

[0009] The separation mechanism is arranged at intervals of no less than two sets along the length of the drill feed frame I. Each set of separation mechanisms includes a middle V-shaped plate with its upper surface flush with the bottom of the drill feed frame I groove. A middle separation cylinder is hinged to the bottom of the middle V-shaped plate. Both sides of the middle V-shaped plate are hinged to the top of the groove along the inclined surface inside the drill feed frame I groove.

[0010] Safety stop pins that are staggered front to back and extend and retract vertically are installed on both sides of the top of the drill feed frame I.

[0011] At least two sets of kick-out mechanisms are arranged at intervals along the length of the drill feed frame I. Each set of kick-out mechanisms includes a left kick-out plate and a right kick-out plate arranged side by side and flush with the groove of the drill feed frame I. The top of the opposite side of the left kick-out plate and the right kick-out plate are respectively hinged to the top of the groove of the drill feed frame I. A left connecting rod is hinged to the bottom of the left kick-out plate away from the hinge end, and a right connecting rod is hinged to the bottom of the right kick-out plate away from the hinge end. The bottom of the left and right connecting rods are provided with elongated holes at the top and bottom, and a crank with the other end inclined upward is movably connected through the elongated holes. The top of the two cranks are fixedly connected to a drive shaft. The drive shafts of each set of kick-out mechanisms are coaxial and a drive device is fixedly connected to one end of the drive shaft.

[0012] The second technical solution adopted in this invention is: a method for batch conveying and lifting power catwalks for drilling, comprising the following steps: Step 1: Roll the three pipe columns from the pipe rack into the V-groove of the drill feed frame I, and raise the front end of the drill feed column that is attached to the ramp to make it tilt. Step 2: The lifting cylinder extends to raise the free end of the support upward, driving the front end of the drill string to rise along the ramp until the drill string is raised to the highest position, thus completing the lifting of the drill string. Step 3: The separation mechanism extends upward to separate the three tubing strings in the V-groove of the drill feed frame I along the width direction. After separation, the separation stop pins on both sides of the bottom of the groove extend upward. Then the separation mechanism retracts, and the three tubing strings are blocked outside the two separation stop pins on both sides and the middle one, completing the separation action of the three tubing strings. Step 4: The small trolley pushes the intermediate tubing string forward to the vicinity of the wellhead. After the traveling block system lifts the tubing string away, the small trolley returns to the tail end of the drill string I frame. Step 5: The single-sided separation pin retracts, and the tubing on the same side rolls into the bottom of the drill string I frame. The small trolley pushes the tubing that has rolled into the middle position forward to the vicinity of the wellhead. After the traveling block system lifts the tubing away, the small trolley returns to the tail end of the drill string I frame. Step 6: The lifting cylinder retracts, causing the free end of the support to retract downwards, which in turn drives the front end of the drill string to descend along the ramp until the drill string is lowered to the lowest position, completing the one-time delivery of three drill strings by the power catwalk.

[0013] The third technical solution adopted in this invention is: a method for batch conveying and lifting power catwalks for throwing drills, comprising the following steps: Step 1: The lifting cylinder extends to raise the free end of the support upward, driving the front end of the drill string to rise along the ramp until the drill string is raised to the highest position, thus completing the lifting of the drill string. Step 2: After the first and second pipe strings are lowered to the bottom of the V-groove of the drilling frame I by the traveling hoist system, the small pulley pulls the pipe string back to the swing position. The separation mechanism extends on one side and flips the single pipe string to the side of the drilling frame I. The separation stop pin on the same side extends and blocks the single pipe string on its outside. Step 3: After the third pipe string is lowered by the traveling hoist system to the bottom of the V-groove of the drill feed frame I, the small pulley pulls the pipe string back to the ejection position; Step 4: The lifting cylinder retracts, causing the free end of the support to retract downwards, which in turn drives the front end of the drill string to descend along the ramp until the drill string is lowered to its lowest position. Step 5: All the separation pins on both sides of the V-groove of the drill feed frame I retract, and the three pipe strings are concentrated at the bottom of the groove of the drill feed frame I. The kick-out mechanism extends and rolls the three pipe strings out at the same time, completing the three pipe strings being thrown out at once by the power catwalk.

[0014] The beneficial effects of this invention are as follows: The batch conveying and lifting power catwalk and the drilling and throwing method of this invention can roll in three tubing strings at once, and then separate them in the drilling string, thereby improving the tubing string loading efficiency. It changes the traditional conveying method of conveying one tubing string at a time, and can convey up to three tubing strings at a time, thereby reducing the number of tubing string conveying times, greatly shortening the conveying cycle, and improving the operation efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the initial state structure of the batch conveying and lifting powered cat walkway of the present invention; Figure 2 This is a schematic diagram of the lifting start state structure of the batch conveying lifting power cat track of the present invention; Figure 3This is a schematic diagram of the lifting completed state structure of the batch conveying lifting power cat track of the present invention; Figure 4 This is a schematic diagram of the drill string structure in the initial state of the batch conveying and lifting power catwalk of the present invention; Figure 5 This is a schematic diagram of the structure of the batch conveying and lifting power catwalk for lifting and feeding drill string according to the present invention; Figure 6 This is a top view of the drill feeding frame I in the batch conveying and lifting power catwalk of the present invention; Figure 7 This is a schematic diagram of the small trolley in the batch conveying and lifting powered catwalk of the present invention; Figure 8 This is a schematic diagram of the state when the separation mechanism is not separating in Embodiment 2 of the batch conveying lifting powered cat walkway of the present invention; Figure 9 This is a schematic diagram of the state after separation by the separation mechanism in Embodiment 2 of the batch conveying lifting powered cat walkway of the present invention; Figure 10 This is a schematic diagram of the state when the separation mechanism is not separating in Embodiment 3 of the batch conveying lifting powered cat walkway of the present invention; Figure 11 This is a schematic diagram of the state after separation by the separation mechanism in Embodiment 3 of the batch conveying lifting powered cat walkway of the present invention; Figure 12 This is a schematic diagram of the kick-out mechanism in the batch conveying lifting power cat track of the present invention; Figure 13 yes Figure 12 A partially enlarged schematic diagram of region A of the batch conveying and lifting powered cat walkway of the present invention; Figure 14 This is a schematic diagram of the initial state of the kick-out mechanism in the batch conveying and lifting powered cat walkway of the present invention; Figure 15 This is a schematic diagram of the flipped-out state of the kick-out mechanism in the batch conveying lifting power cat track of the present invention.

[0016] In the diagram, 1. Catwalk base; 2. Ramp; 3. Bracket; 4. Lifting cylinder; 5. Drill feed column; 51. Drill feed frame I; 511. Drill feed frame I frame; 512. Small trolley; 512a. Trolley frame; 512b. Removable baffle; 513. Kick-out mechanism; 513a. Left kick-out plate; 513b. Left connecting rod; 513c. Crank; 513d. Drive shaft; 513e. Drive unit; 5 13f. Return spring; 513g. Right kick-out plate; 513h. Right connecting rod; 514. Separation mechanism; 514a. Separation plate; 514b. Single-sided separation cylinder; 514c. Middle V-shaped plate; 514d. Side plate; 514e. Middle separation cylinder; 515. Separation stop pin; 516. Safety stop pin; 517. Tail baffle; 52. Drill feeder II; 53. Folding cylinder; 6. Tubing string. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0018] Example 1 This invention provides a batch conveying lifting powered catwalk, such as... Figures 1 to 3 As shown, the system consists of a catwalk base 1, ramp 2, support 3, lifting cylinder 4, and drill string 5. The catwalk base 1 serves as the foundation for other structures and is located in the ground storage area. Similar to other powered catwalks, the catwalk base 1 has an internal inclined structure and pipe racks on both sides for storing the drill string 6. The ramp 2 is hinged at its lower end to the front end of the catwalk base 1 and its upper end overlaps the drill platform. The ramp 2 has a track for the drill string 5. The support 3 drives the drill string 5 to lift. The lower end of the support 3 is hinged to the catwalk base 1, the upper end is hinged to the tail of the drill string 5, and the middle position is hinged to the lifting cylinder 4. When the lifting cylinder 4 extends or retracts, the upper end of the support 3 can swing accordingly. The drill string 5 is the main body for conveying the drill string 6. Figure 4 and Figure 5 As shown, it consists of a drilling frame I51, a drilling frame II52 and a folding cylinder 53. The drilling frame I51 and the drilling frame II52 are hinged together. One end of the folding cylinder 53 is hinged to the drilling frame I51 and the other end is hinged to the drilling frame II52. The drilling frame II52 can swing around the front end of the drilling frame I51 as the folding cylinder 53 extends and retracts.

[0019] The lifting process of drill string 5: In the initial state, such as Figure 1 and Figure 4 As shown, the drill string 5 is in a bent state. At this time, the front ends of the drill feed frame I51 and drill feed frame II52 overlap on the ramp 2, and the folding cylinder 53 is in a follow-up state; the lifting begins, as... Figure 2 and Figure 5As shown, the folding cylinder 53 retracts, and the included angle between the upper parts of the drill feed frame II 52 and the drill feed frame I 51 gradually increases until the drill feed frame II 52 and the drill feed frame I 51 are in a straight line. During this process, the front end of the drill feed frame II 52 is always in contact with the ramp 2, and the front end of the drill feed column 5 is gradually raised slightly to a certain angle, so that the subsequent lifting cylinder 4 can lift it from the tail end of the drill feed column 5 through the bracket 3; then, as Figure 3 As shown, the lifting cylinder 4 extends, and the support 3 swings and its upper end rises, driving the drill string 5 to rise along the ramp 2 until the drill string 5 is raised to its highest position, completing the lifting process of the drill string 5. The lowering process is the reverse of this process.

[0020] like Figure 6 As shown, the foundation of the drill feed frame I51 is the drill feed frame I body 511 with an internal V-groove structure. The outer front end of the drill feed frame I body 511 is hinged to the folding cylinder 53, and the bottom of the tail end is hinged to the upper end of the bracket 3. The drill feed frame I body 511 is equipped with a small trolley 512, a kick-out mechanism 513, a separation mechanism 514, a separation stop pin 515, a safety stop pin 516, and a tail baffle 517. The ejection mechanism 513 is located in the middle of the drill feeder I frame 511 and is used to flip up and roll the tubing string 6 out of the drill feeder I frame 511 during drill ejection. A set of separation mechanisms 514 is arranged before and after the ejection mechanism 513. Separation pins 515 and 516 are both structures where the output end of a telescopic cylinder is connected to a pin shaft, and are arranged near the separation mechanisms 514. The separation mechanisms 514 separate the three tubing strings 6 loaded into the drill feeder I frame 511 into one at the bottom of the trench and one on each of the two inclined surfaces. The safety pins 516 prevent the tubing strings 6 from rolling out of the drill feeder I frame 511 during separation. After separation, the separation mechanisms 514 retract. The separating pin 515 extends and separates the three tubing strings 6. Then, the small trolley 512 first pushes out the middle tubing string 6. Next, one separating pin 515 retracts, and the tubing string 6 on the inclined surface it blocks rolls down to the previous position of the middle tubing string 6. Then, the small trolley 512 pushes out the rolled-down tubing string 6. Finally, another separating pin 515 retracts, and similarly, the last tubing string 6 rolls down to the bottom of the groove and is pushed out by the small trolley 512. The tail baffle 517 is arranged on both sides of the small trolley 512 at the tail of the drill feed frame I frame 511. Together with the small trolley 512, it prevents the tubing string 6 from slipping due to the low height of the tail end during the lifting process of the drill feed string 5.

[0021] like Figure 7As shown, the small trolley 512 consists of a trolley frame 512a extending from the bottom to the bottom of the V-shaped groove and two detachable baffles 512b inserted on both sides. When conveying three pipe columns 6, the detachable baffles 512b are removed, and the trolley frame 512a is open on both sides. In this way, when the small trolley 512 is running, it can only push the middle pipe column 6 at the bottom of the groove of the drilling frame I body 511, and the pipe columns 6 on both sides are not affected. After the middle pipe column 6 is conveyed, the pipe column 6 on one side rolls to the bottom of the groove. The detachable baffle 512b can be installed on the trolley frame 512a corresponding to the empty side. Similarly, when there is only one pipe column 6 left, there are no pipe columns 6 on the inclined surfaces on both sides of the bottom of the groove. At this time, two detachable baffles 512b can be installed to improve the safety factor and prevent the tail end of the pipe column 6 from coming out of the open part of the trolley frame 512a.

[0022] Example 2 This invention provides a batch conveying lifting powered catwalk, based on Embodiment 1, such as... Figure 8 and Figure 9 As shown, each separation mechanism 514 preferably consists of two separation plates 514a and two single-sided separation cylinders 514b, arranged symmetrically, with the drill string 5 staggered in the longitudinal direction. One end of the separation plate 514a is hinged to the top of the slot of the drill string I frame 511, and the bottom end is hinged to the single-sided separation cylinder 514b. The upper surface of the separation plate 514a extends downward along the inclined surface inside the slot from near the top of the slot and then folds up a distance after passing the bottom of the slot, so that when the separation plate 514a swings, it can only hook one side of the intermediate tube string 6, such as... Figure 8 As shown, when the separation plate 514a is not extended, its upper surface is flush with the V-groove of the drill feed frame I body 511. The V-groove can have through holes at the corresponding positions of the separation plate 514a, as well as holes for the separation stop pin 515 and safety stop pin 516 to pass through upwards, thus ensuring that the separation plate 514a can extend upwards. The telescopic cylinders of the single-sided separation cylinder 514b, the separation stop pin 515, and the safety stop pin 516 are arranged below the V-groove and connected to the inside of the drill feed frame I body 511, thus ensuring the overall flatness of the V-groove surface, avoiding gaps in the V-groove, and ensuring the emergency function of the catwalk. The separation plates 514a on the same side move synchronously through the single-sided separation cylinder 514b. The left and right separation plates 514a can move synchronously or separately. Figure 9 As shown, the separation process is as follows: After the three tubing columns roll into the V-groove of the drill feed frame I 511, the safety stop pins 516 on both sides extend to ensure that the tubing column 6 will not roll out of the V-groove; the separation plates 514a on both sides extend simultaneously, so that the middle tubing column 6 is clamped in the middle and lifted as the separation plates 514a on both sides extend, and the tubing columns 6 on both sides roll to the sides respectively. Then, the two separation stop pins 515 extend, and the separation plates 514a on both sides retract at the same time. Thus, the tubing columns 6 on both sides are separated by the separation stop pins 515 on both sides of the V-groove, completing the separation action of the three tubing columns.

[0023] Example 3 This invention provides a batch conveying lifting powered catwalk, based on Embodiment 1, such as... Figure 10 and Figure 11 As shown, each separation mechanism 514 preferably consists of a central V-shaped plate 514c, two side plates 514d, and a central separation cylinder 514e. The central V-shaped plate 514c is hinged to the two side plates 514d on both sides, and to the central separation cylinder 514e at its bottom. The side plates 514d are connected to the elongated holes along the inclined surfaces of the drill feed frame I body 511. The central separation cylinder 514e can only extend and retract vertically and cannot swing relative to the drill feed frame I body 511. The width of the central V-shaped plate 514c is only enough to hold one pipe column. Figure 10 As shown, in the initial state, the intermediate separating cylinder 514e is retracted to its shortest length. The V-groove formed by the intermediate V-shaped plate 514c and the side plate 514d is flush with the V-groove of the drilling frame I body 511. The V-groove of the drilling frame I body 511 only has through holes to accommodate the intermediate V-shaped plate 514c and the side plate 514d, and holes for the separating stop pin 515 and the safety stop pin 516 to pass through upwards. The telescopic cylinders of the intermediate separating cylinder 514e, the separating stop pin 515, and the safety stop pin 516 are located below the V-groove and connected to the inside of the drilling frame I body 511, thus ensuring the overall flatness of the V-groove surface, avoiding gaps in the V-groove, and ensuring the emergency function of the catwalk. Figure 11 As shown, the separation process is as follows: After the three tubing strings 6 roll into the V-groove of the drill feed frame I 511, the middle separation cylinder 514e extends, and the middle V-plate 514c is lifted, raising the middle tubing string 6 to a high position; at the same time, the side plates 514d swing accordingly, and the two tubing strings 6 roll outward along the side plates 514d. Then, the separation pin 515 extends, the middle separation cylinder 514e retracts, and the two tubing strings 6 are separated by the separation pin 515 onto the inclined surfaces on both sides of the V-groove of the drill feed frame I 511. The middle tubing string 6 returns to its initial position, thus completing the separation action of the three tubing strings.

[0024] Example 4 This invention provides a batch conveying lifting powered catwalk, based on Embodiment 1, such as... Figure 12 and Figure 13As shown, the kick-out mechanism 513 preferably consists of a left kick-out plate 513a, a left connecting rod 513b, a crank 513c, a transmission shaft 513d, a drive device 513e, a return spring 513f, a right kick-out plate 513g, and a right connecting rod 513h. The left kick-out plate 513a and the right kick-out plate 513g are hinged to opposite sides of the drill feed frame I body 511. The bottom ends of both the left kick-out plate 513a and the right kick-out plate 513g are fixed with return springs 513f connected to the drill feed frame I body 511 near their respective hinge points. Meanwhile, the left kick-out plate 513a and the right kick-out plate 513g are... The other end is also hinged to the left connecting rod 513b and the right connecting rod 513h respectively; the lower ends of the left connecting rod 513b and the right connecting rod 513h are opened with elongated holes, and each elongated hole is connected to the cranks 513c located at the front and rear ends by a pin. There is a certain phase angle between the cranks 513c at the lower end of the left connecting rod 513b and the cranks 513c at the lower end of the right connecting rod 513h; the end of the crank 513c away from the left connecting rod 513b and the right connecting rod 513h is connected to the drive device 513e through the transmission shaft 513d. When the drive device 513e rotates, the two sets of cranks 513c rotate synchronously.

[0025] like Figure 14 As shown, in the initial state, both the left kick-out plate 513a and the right kick-out plate 513g are flush with the V-groove of the drill feed frame I body 511. Only through holes for accommodating the left kick-out plate 513a and the right kick-out plate 513g are opened on the V-groove. All components below the kick-out plates are located below the V-groove, thus ensuring the overall flatness of the V-groove surface, avoiding gaps in the V-groove, and ensuring the emergency function of the catwalk. In the initial state, the left connecting rod 513b, the right connecting rod 513h, and the crank 513c are in a symmetrical state, and the connecting shaft of the crank 513c is located at the upper end of the elongated holes of the left connecting rod 513b and the right connecting rod 513h; Figure 15 As shown, when the drive device 513e rotates clockwise, the left crank 513c rotates upward and presses against the left connecting rod 513b, causing the left kick-out plate 513a to rotate around the hinge point and flip outward. The return spring 513f below the left kick-out plate 513a is stretched. At the same time, the right crank 513c rotates downward, and the pin of the right crank 513c slides downward relative to the right connecting rod 513h in the elongated hole. The right kick-out plate 513g remains stationary. At the same time, the stability of the right kick-out plate 513g is improved by the restraint of the return spring 513f below it and the drill feed frame I body 511. When the drive device 513e rotates back to the initial position in the opposite direction, the left kick-out plate 513a rotates back to the initial position, thus completing the process of kicking out the tubing 6 to the right. Conversely, when the drive device 513e rotates counterclockwise and then returns to the initial position, the process of kicking out the tubing 6 to the left is completed.

[0026] Example 5 This invention provides a method for batch conveying drilling rigs using a lifting-type power catwalk, comprising the following steps: Step 1: The tubing string 6 rolls from the tubing support into the V-groove of the drill string 5; the folding cylinder 53 retracts, and the drill feed frame II 52 rotates around the drill feed frame I 51 until the drill feed frame II 52 and the drill feed frame I 51 are in a straight line.

[0027] Step 2: The lifting cylinder 4 extends, and the bracket 3 swings accordingly, driving the drill string 5 to rise along the ramp 2 until the drill string 5 is raised to the highest position, completing the drill string lifting process.

[0028] Step 3: The separation mechanism 514 and the separation stop pin 515 operate in sequence to separate the three pipe strings 6 within the V-groove of the drilling frame I body 511.

[0029] Step 4: The two sides of the pulley frame 512a are connected. The small pulley 512 pushes the middle tubing 6 forward to the vicinity of the wellhead. After the traveling block system lifts the tubing 6 away, the small pulley 512 returns to the initial position.

[0030] Step 5: The single-sided separation pin 515 retracts, and the side tubing 6 rolls into the middle of the V-groove of the drill string I frame 511. The removable baffle 512b is installed on the pulley frame 512a on the retracted side. The small pulley 512 pushes the middle tubing 6 forward to the vicinity of the wellhead. After the traveling block system lifts the tubing 6 away, the small pulley 512 returns to the initial position.

[0031] Step 6: The other side separation pin 515 retracts, the tubing 6 rolls into the middle of the V-groove of the drill string I frame 511, and detachable baffles 512b are installed on both sides of the trolley frame 512a. The small trolley 512 pushes the middle tubing 6 forward to the vicinity of the wellhead. After the traveling block system lifts the tubing away, the small trolley 512 returns to the initial position.

[0032] Step 7: The lifting cylinder 4 retracts, and the bracket 3 swings accordingly, driving the drill string 5 down along the ramp 2 until the drill string 5 is lowered to the lowest position; the folding cylinder 53 extends, and the drill string II 52 rotates around the drill string I 51 until the drill string II 52 and the drill string I 51 reach the initial state, completing the process of conveying three drill strings 6 in one go through the power catwalk.

[0033] Example 6 This invention provides a batch conveying lifting-type power catwalk method for ejecting drill bits. It is basically the opposite of the drill feeding process. After the drill string 6 is lowered by the traveling hoist system to the bottom of the V-shaped groove of the drill feeding frame I 511, the small trolley 512 pulls the drill string 6 back to the ejection position. The separation mechanism 514 moves on one side to flip the drill string 6 to the side of the V-shaped groove of the drill feeding frame I 511. The separation stop pin 515 moves to block the drill string 6 on the side of the V-shaped groove. The above process is repeated to place the second drill string 6 in the side of the V-shaped groove. After the third drill string 6 is lowered to the bottom of the V-shaped groove of the drill feeding frame I 511, the drill string 5 is lowered to the initial state. The separation stop pin 515 and the safety stop pin 516 are all retracted. The kick-out mechanism 513 rolls out the three drill strings 6 at the same time, completing the process of ejecting three drill strings 6 at one time by the power catwalk.

Claims

1. A mass transit elevator powered catwalk characterized by, Includes a catwalk base (1) and a ramp (2) hinged above one end. A lifting cylinder (4) and a bracket (3) located between the catwalk base (1) and the ramp (2) are hinged at intervals. The free end of the lifting cylinder (4) is hinged to the frame of the bracket (3). The free end of the bracket (3) is hinged to a drill string (5) whose front end overlaps the ramp (2). The drill string (5) includes a drill feed frame I frame (511) whose tail end is hinged to the bracket (3). The cross section of the body (511) along the width direction is a V-shaped groove. The bottom of the groove of the drill feed frame I body (511) is provided with a vertically extending separation mechanism (514). The inclined surfaces on both sides of the groove bottom are provided with vertically extending separation stop pins (515). The drill feed frame I body (511) is slidably fitted with a small trolley (512) that extends into the bottom of the groove along the length direction. The drill feed frame I body (511) is provided with a kick-out mechanism (513) for rolling out the pipe string (6).

2. The mass transfer lift powered catwalk of claim 1, wherein, The drill string (5) consists of a drill feed frame II (52) and a drill feed frame I (51) that are hinged together at the front and rear. The front end of the drill feed frame II (52) is attached to the ramp (2). A folding cylinder (53) is hinged together between the sides of the drill feed frame II (52) and the drill feed frame I (51).

3. The batch conveying and lifting powered catwalk as described in claim 1, characterized in that, The separation mechanism (514) is arranged in at least two sets along the length of the drill feed frame I (511). Each set of separation mechanism (514) includes two separation plates (514a) that are staggered front to back. The upper surface of each separation plate (514a) is a V-shaped structure that is flush with the bottom of the groove of the drill feed frame I (511). The two separation plates (514a) on opposite sides extend to the top of the groove of the drill feed frame I (511) and are hinged thereto. A single-sided separation cylinder (514b) is hinged below the bottom of the two separation plates (514a) on opposite sides. The top of the separation stop pin (515) on each side of the groove bottom is located outside the free end of the opposite separation plate (514a).

4. The batch conveying lifting powered catwalk as described in claim 1, characterized in that, The separation mechanism (514) is arranged in at least two sets along the length of the drill feed frame I body (511). Each set of separation mechanism (514) includes a middle V-shaped plate (514c) with its upper surface flush with the bottom of the groove of the drill feed frame I body (511). A middle separation cylinder (514e) is hinged to the bottom of the middle V-shaped plate (514c). Both sides of the middle V-shaped plate (514c) are hinged to the top of the side plate (514d) along the inclined surface inside the groove of the drill feed frame I body (511).

5. The batch conveying and lifting powered catwalk as described in claim 3 or 4, characterized in that, Safety stop pins (516) that are staggered in front and behind and extend and retract in the upper and lower sides are provided on both sides of the top of the slot of the drilling frame I (511).

6. The batch conveying lifting powered catwalk as described in claim 1, characterized in that, The kick-out mechanism (513) is arranged in at least two sets along the length of the drill feed frame I (511). Each set of kick-out mechanisms (513) includes a left kick-out plate (513a) and a right kick-out plate (513g) arranged side by side and flush with the groove of the drill feed frame I (511). The top ends of the opposite sides of the left kick-out plate (513a) and the right kick-out plate (513g) are respectively hinged to the top sides of the groove of the drill feed frame I (511). A left connecting rod (513g) is hinged to the bottom of the left kick-out plate (513a) away from the hinge end. 13b) A right connecting rod (513h) is hinged to the bottom of the right kick-out plate (513g) away from the hinge end. The bottom ends of the left connecting rod (513b) and the right connecting rod (513h) are provided with elongated holes at the top and bottom, and cranks (513c) with the other end tilted upward are movably connected through the elongated holes. The top ends of the two cranks (513c) are fixedly connected to the drive shaft (513d). The drive shafts (513d) of each kick-out mechanism (513) are coaxial and a drive device (513e) is fixedly connected to the outside of one end.

7. The batch conveying and lifting power catwalk drilling method as described in claim 1, characterized in that, Includes the following steps: Step 1: Roll the three pipe columns (6) from the pipe rack into the V-groove of the drill feed frame I (511), and raise the front end of the drill feed column (5) that is attached to the ramp (2) to make it tilt. Step 2: The lifting cylinder (4) extends to lift the free end of the support (3) upward, which drives the front end of the drill string (5) to rise along the ramp (2) until the drill string (5) is lifted to the highest position, thus completing the lifting of the drill string (5); Step 3: The separation mechanism (514) extends upward to separate the three pipe strings (6) in the V-groove of the drill feed frame I (511) along the width direction. After separation, the separation stop pins (515) on both sides of the bottom of the groove extend upward. Then the separation mechanism (514) retracts, and the three pipe strings (6) are blocked outside the two separation stop pins (515) on both sides and the middle one, thus completing the separation action of the three pipe strings (6). Step 4: The small pulley (512) pushes the intermediate tubing (6) forward to the vicinity of the wellhead. After the traveling hoist system lifts the tubing (6) away, the small pulley (512) returns to the tail end of the drill string I frame (511). Step 5: The single-sided separation pin (515) retracts, and the pipe string (6) on the same side rolls into the bottom of the groove of the drill string I frame (511). The small trolley (512) pushes the pipe string (6) that has rolled into the middle position forward to the vicinity of the wellhead. After the traveling hoist system lifts the pipe string (6) away, the small trolley (512) returns to the tail end of the drill string I frame (511). Step 6: The lifting cylinder (4) retracts, causing the free end of the support (3) to retract downwards, which drives the front end of the drill string (5) to descend along the ramp (2) until the drill string (5) is lowered to the lowest position, completing the one-time delivery of three pipe strings (6) by the power catwalk.

8. The batch conveying and lifting power catwalk method for drilling as described in claim 1, characterized in that, Includes the following steps: Step 1: The lifting cylinder (4) extends to lift the free end of the support (3) upward, which drives the front end of the drill string (5) to rise along the ramp (2) until the drill string (5) is lifted to the highest position, thus completing the lifting of the drill string (5); Step 2: After the first and second pipe strings are lowered to the bottom of the V-groove of the drilling frame I (511) by the traveling hoist system, the small trolley (512) pulls the pipe string (6) back to the swing position. The separation mechanism (514) extends on one side and flips the single pipe string (6) to the side of the drilling frame I (511). The separation stop pin (515) on the same side extends and blocks the single pipe string (6) on its outside. Step 3: After the third pipe string is lowered by the traveling hoist system to the bottom of the V-groove of the drill feed frame I (511), the small pulley (512) pulls the pipe string (6) back to the drill throwing position; Step 4: The lifting cylinder (4) retracts, causing the free end of the support (3) to retract downwards, which in turn drives the front end of the drill string (5) to descend along the ramp (2) until the drill string (5) is lowered to the lowest position. Step 5: The separation pins (515) on both sides of the V-groove of the drill feed frame I (511) are all retracted, and the three pipe columns (6) are concentrated at the bottom of the groove of the drill feed frame I (511). The kick-out mechanism (513) extends and rolls the three pipe columns (6) out in unison, completing the three pipe columns (6) being thrown out by the power catwalk in one go.

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