CN117927142A - Tripping and drilling device for submarine in-situ drilling and operation method - Google Patents
Tripping and drilling device for submarine in-situ drilling and operation method Download PDFInfo
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- CN117927142A CN117927142A CN202211268112.6A CN202211268112A CN117927142A CN 117927142 A CN117927142 A CN 117927142A CN 202211268112 A CN202211268112 A CN 202211268112A CN 117927142 A CN117927142 A CN 117927142A
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- 238000005553 drilling Methods 0.000 title claims abstract description 82
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 238000007599 discharging Methods 0.000 claims abstract description 13
- 230000001174 ascending effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000004080 punching Methods 0.000 description 3
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
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Abstract
The invention discloses a tripping and drilling device for submarine in-situ drilling operation, which comprises a base, wherein a wellhead hole is formed in the base, a lower hydraulic clamp base is fixed on the edge of the wellhead hole in the base, a guide rail is fixed on the base, the guide rail is connected with an underwater top drive through a gear rack, the underwater top drive comprises a rotary central pipe, the bottom of the rotary central pipe is of an external thread structure, and an upper hydraulic clamp is fixed on the rotary central pipe; the base next door still is provided with manipulator and rotatory pipe rack, and the manipulator can rotate flexible and snatch, and rotatory pipe rack and rotatory center tube set up in the thread that the manipulator can rotate and snatch. The invention also discloses a drill string transmission, connection and drilling method for the submarine in-situ drilling operation and a drill string tripping, disassembling and discharging method for the submarine in-situ drilling operation. The invention solves the technical problems of complex operation flow, more participation devices, more underwater operation risks and the like in the prior art.
Description
Technical Field
The invention belongs to the technical field of submarine in-situ drilling, relates to a tripping and drilling device for submarine in-situ drilling, and further relates to an operation method of the device.
Background
The semi-submersible drilling platform is adopted twice in China to perform trial production on the seabed natural gas hydrate, economic production of the natural gas hydrate is difficult to achieve due to huge trial production cost, and therefore the production cost is greatly reduced by moving drilling equipment underwater for drilling.
The prior art comprises the following steps: the document 'deep sea sediment continuous pressure maintaining coring submarine drilling machine and operation method' (patent number: ZL 201210419116. X) discloses a deep sea sediment continuous pressure maintaining coring submarine drilling machine and operation method, wherein equipment for lifting and drilling by the drilling machine mainly comprises an underwater top drive and back tongs thereof, a drill rod mechanical arm, a hydraulic punching clamp, a drill rod clamping seat, a pipe rack, a derrick, a base and the like. In the drilling process of the drilling machine, the underwater top drive central pipe is connected with the drilling rod, and the underwater top drive is required to be screwed with the drilling rod manipulator, and then the underwater top drive and the back tongs thereof are required to be used for fastening; the drill rod is connected with the drill rod, and the underwater top drive is required to be in rotary buckling with the drill rod clamping seat, and then the hydraulic punching buckle pliers are required to be used for fastening. In the process of tripping the drill, the drill rod is connected with the drill rod, the hydraulic punching clamp is used for loosening the drill rod, and then the underwater top drive is used for backing the drill rod with the drill rod clamping seat; the connection of the underwater top drive central tube and the drill rod requires that the underwater top drive and a back-up wrench thereof are firstly adopted for loosening, and then the underwater top drive and the drill rod manipulator are adopted for backing-out. The connecting screw thread of the drill rod and the underwater top drive central pipe needs the drill rod manipulator to bear torque when the screw is turned on, and the connecting screw thread between the drill rod and the drill rod joint needs the drill rod clamping seat to bear torque when the screw is turned on, so that the design difficulty of the drill rod manipulator and the drill rod clamping seat is increased, the centering of the drill rod is difficult to ensure, and the difficulty of butt joint of the screw threads is increased; the connection between the drill rod and the underwater top drive central pipe and the connection between the drill rod and the drill rod need to be operated in two steps, the operation flow is complex, the number of the participation devices is large, the difficulty of underwater operation is large, and the quick and efficient in-situ drilling operation on the seabed in the process of tripping and drilling operation are not facilitated under the condition of no human intervention.
Disclosure of Invention
The invention aims to provide a tripping and drilling device for submarine in-situ drilling operation, which meets the requirements of quick and efficient transmission, connection and drilling operation of underwater equipment on a drill string single part under the condition of no intervention on the seabed. The technical problems of complex operation flow, more participation devices, more underwater operation risks and the like in the prior art are solved.
The first technical scheme adopted by the invention is as follows:
The tripping and drilling device for the submarine in-situ drilling operation comprises a base, wherein a wellhead hole is formed in the base, a lower hydraulic clamp base is fixed on the edge of the wellhead hole in the base, a guide rail is fixed on the lower hydraulic clamp base, the guide rail is connected with an underwater top drive through a gear rack, the underwater top drive comprises a rotary central pipe, the bottom of the rotary central pipe is of an external thread structure, an upper hydraulic clamp is fixed on the rotary central pipe, and the rotary central pipe, the upper hydraulic clamp center, the lower hydraulic clamp center and the wellhead hole are arranged on the same axis;
the base next door still is provided with manipulator and rotatory pipe rack, and the manipulator can rotate flexible and snatch, and rotatory pipe rack and rotatory center tube set up in the thread that the manipulator can rotate and snatch.
The invention is also characterized in that:
The rotary rake includes the pivot, and the both ends of pivot are fixed with roof and bottom plate respectively, and pivot one end is fixed with the motor, and it evenly is provided with the drilling string and places the position to revolute the pivot, and every places the position and includes two pairs of buckles and a leaf spring, and two pairs of buckles are fixed respectively on roof and bottom plate, and the leaf spring middle section is fixed in the pivot, and the leaf spring both ends are towards buckle direction.
The upper hydraulic pliers and the lower hydraulic pliers comprise three telescopic hydraulic cylinders fixed around the axis, and clamp teeth are fixed at the tail end of each telescopic hydraulic cylinder.
The telescopic hydraulic cylinder of the upper hydraulic clamp is fixed on the extension line of the rotary central tube, the telescopic hydraulic cylinder of the upper hydraulic clamp is fixed on the rotary central tube through a fixing piece, and the fixing piece is fixed on a non-threaded part of the rotary central tube.
The manipulator comprises a rotating shaft, and an upper telescopic arm and a lower telescopic arm are fixed on the rotating shaft.
The second object of the invention is to provide a drill string transmission, connection and drilling method for submarine in-situ drilling operation, which comprises the following technical scheme:
step 1, an underwater top drive is lifted to a high position in a guide rail through gear and rack transmission, and after the manipulator rotates to a set position, the manipulator stretches out to take out a single drill string with a drill bit from a rotary rake and transfers the single drill string to the position right below an upper hydraulic clamp at the center of a wellhead;
Step 2, the clamp teeth of the upper hydraulic clamp are opened, the underwater top drive slowly descends until the clamp teeth can be clamped to the top joint of the single drill string, and then the three telescopic hydraulic cylinders synchronously extend out, and the clamp teeth clamp the top joint of the single drill string; the manipulator is then opened and retracted, rotated about its own axis to a position to take the drill string, then extended, clamped from the rotating rake and taken out of the single drill string, and then returned to the waiting position;
Step 3, three telescopic hydraulic cylinders of the lower hydraulic pliers retract synchronously, the clamp teeth are opened, the underwater top drive slowly descends until the lower part of the single drill string passes through the lower hydraulic pliers, then the three telescopic hydraulic cylinders extend synchronously, and the clamp teeth clamp the lower pipe body of the single drill string;
Step 4, three telescopic hydraulic cylinders of the upper hydraulic pliers retract synchronously, pliers teeth are opened, a hydraulic motor of the underwater top drive is started, the upper hydraulic pliers fixedly connected with the lower end of the rotary central pipe are driven to rotate at a low speed, the underwater top drive slowly descends, and the lower end of the rotary central pipe and a threaded joint at the upper end of a single drill string are screwed together until the threaded joint is screwed to a set torque value;
Step 5, three telescopic hydraulic cylinders of the lower hydraulic pliers retract synchronously, the pliers teeth are opened, the underwater top drive continues to drill downwards at a set speed, and drilling is stopped when the lower end of the upper hydraulic pliers is close to the upper end of the lower hydraulic pliers; thus, the transmission, connection and drilling operation of the 1 st single drill string are completed;
Step 6, the three telescopic hydraulic cylinders of the lower hydraulic pliers extend synchronously, the pliers teeth clamp a single drill string, the rotary central pipe of the underwater top drive rotates reversely, the connecting threads with the single drill string are disconnected, and the underwater top drive slowly moves upwards at the same time until the connecting threads are completely disconnected;
step 7, the underwater top drive slowly rises to a high position in the guide rail through gear and rack transmission;
Step 8, the manipulator in the waiting position clamps the single drill string, rotates around the axis of the manipulator to the direction of the central line of the wellhead, and extends out to transfer the single drill string to the position right below the upper hydraulic clamp; thus, the transmission of the second single drill string is completed;
Step 9, repeating the steps 2 to 5, so as to finish the connection and drilling operation of the second single drilling column; the mechanical arm retracts and rotates to a waiting position; and (5) repeating the steps 2-5 to transfer, connect and drill the residual single drill string until the target well drilling operation is completed.
The third object of the invention is to provide a method for tripping, disassembling and discharging a drill string for submarine in-situ drilling operation, which comprises the following technical scheme:
Step 1, after drilling operation is completed, lifting a drill string pipe string, synchronously extending a telescopic hydraulic cylinder of a lower hydraulic clamp, clamping the drill string by clamp teeth, reversely rotating a rotary central pipe of an underwater top drive, disconnecting a connecting thread with a single drill string, and simultaneously, slowly ascending the underwater top drive until the connecting threads are completely disconnected;
Step 2, three telescopic hydraulic cylinders of the upper hydraulic clamp extend synchronously, clamp teeth clamp the upper part of a drill string, an underwater top drive slowly ascends in a guide rail through gear rack transmission, the drill string in a well bore is lifted up until a single drill string is lifted up from the well bore, a lower connecting joint is positioned above the lower hydraulic clamp, and a specific position refers to a set value;
Step 3, the three telescopic hydraulic cylinders of the lower hydraulic clamp extend synchronously, clamp teeth clamp a drill string at the center of a wellhead, the rotating central pipe of the underwater top drive drives the upper hydraulic clamp to rotate reversely, and a connecting threaded joint of a single drill string and a drill string pipe string in a borehole is disconnected;
Step 4, the manipulator rotates to the central line direction of the wellhead from the waiting position, stretches out the upper telescopic arm and the lower telescopic arm, clamps a single drill string, then three telescopic hydraulic cylinders of the upper hydraulic pliers retract synchronously, the clamp teeth are loosened, the single drill string is clamped by the manipulator and transferred to the rotary pipe rack, and then the manipulator retracts to the waiting position; thus, the tripping, dismounting and discharging operations of a single drill string are completed;
step 5, the underwater top drive descends until the clamp teeth of the upper hydraulic clamp can be clamped to the top joint of the drill string in the well bore;
Step 6, repeating the steps 2 to 4 to carry out the tripping, disassembling and discharging operations of the second single drill string; and (5) repeating the steps 2-4 to finish the tripping, dismantling and discharging operations of all the drill strings.
The beneficial effects of the invention are as follows:
The tripping and drilling operation method for the submarine in-situ drilling operation can realize the operation requirements of single drill string transmission, connection and drilling, tripping, disassembly and discharge in the submarine in-situ drilling operation process by less underwater equipment configuration; meanwhile, as the equipment configuration is less, the system failure rate is reduced, and the underwater operation efficiency is improved; particularly, the upper hydraulic clamp and the lower hydraulic clamp are arranged at high and low positions, and the upper hydraulic clamp can rotate along with the rotating central pipe of the underwater top drive, so that the operation flow of tripping and tripping is greatly simplified; in addition, the upper hydraulic clamp and the lower hydraulic clamp the drill string to connect the drill string, so that the drill string connecting device has the characteristic of good centering and improves the drill string connecting efficiency. The technical problems of complex operation flow, more participation devices, more underwater operation risks and the like in the prior art are effectively solved.
Drawings
FIG. 1 is a schematic illustration of a tripping and drilling apparatus for use in subsea in situ drilling operations in accordance with the present invention;
FIG. 2 is a top view of a tripping and drilling apparatus for use in subsea in situ drilling operations in accordance with the present invention;
FIG. 3 is a top view of a rotating rake in accordance with the present invention;
FIG. 4 is a schematic illustration of the connection between the top drive and the upper hydraulic clamp in the present invention;
FIG. 5 is a schematic view of the clamping of the upper or lower hydraulic pliers of the present invention;
FIG. 6 is a schematic view of the lower hydraulic pliers or lower hydraulic pliers jaw open in accordance with the present invention;
FIG. 7 is a top view of a robotic arm in the present invention removing a single drill string from a rotating rake;
Fig. 8 is a top view of the manipulator of the present invention in a waiting position.
In the figure, the lower hydraulic tong 1, the guide rail 2, the upper hydraulic tong 3, the underwater top drive 4, the rotary central pipe 41, the mechanical arm 5, the upper telescopic arm 51, the lower telescopic arm 52, the rotary shaft 53, the base 6, the single drill string 7, the first rotary pipe rack 8, the second rotary pipe rack 9, the clamp teeth 10, the telescopic hydraulic cylinder 11, the waiting position 12, the plate spring 13, the clamping buckle 14 and the rotary shaft 15.
Detailed Description
The invention will be described in detail below with reference to the drawings and the detailed description.
The first technical scheme of the invention is used for the tripping and drilling device of the submarine in-situ drilling operation, as shown in fig. 1 and 2, the device comprises a base 6, a wellhead hole is formed in the base 6, a lower hydraulic clamp 1 is fixed at the edge of the wellhead hole in the base 6, a guide rail 2 is fixed on the base 6, the guide rail 2 is a door-shaped guide rail, the guide rail 2 is connected with an underwater top drive 4 through a gear rack, the underwater top drive 4 comprises a rotary central tube 41, the underwater top drive 4 drives the rotary central tube 41 to rotate through a hydraulic motor, the bottom of the rotary central tube 41 is of an external thread structure, an upper hydraulic clamp 3 is fixed on the rotary central tube 41, and the centers of the rotary central tube 41, the upper hydraulic clamp 3, the lower hydraulic clamp 1 and the wellhead hole are arranged on the same axis;
the base 6 is also fixedly provided with a mechanical arm 5 and a rotary rake, the number of the rotary rake is two, namely a first rotary rake 8 and a second rotary rake 9, the first rotary rake 8 and the second rotary rake 9 are used for placing a single drill string 7, two ends of the single drill string 7 are threaded connectors, the upper end is a box lower end and is placed in a male buckle when placed, and the lower part of the first single drill string 7 is provided with a drill bit. The manipulator 5 is capable of rotating, telescoping and gripping, and the rotating rake and rotating center tube 41 are disposed within the thread that the manipulator 5 is capable of rotating and gripping. The manipulator 5 comprises a rotating shaft 53, an upper telescopic arm 51 and a lower telescopic arm 52 are fixed on the rotating shaft 53, and the distance between the upper telescopic arm 51 and the lower telescopic arm 52 is larger than the length of the single drill string 7. The mechanical arm 5 can rotate around the rotating shaft 53, so that the single drill string 7 can be taken out of any rotating pipe rack to the center of a wellhead, and the single drill string 7 can be retrieved from the center of the wellhead, rotated to a set position and discharged into any rotating pipe rack.
As shown in fig. 3, the rotary rake includes a rotary shaft 15, two ends of the rotary shaft 15 are respectively fixed with a top plate and a bottom plate, one end of the rotary shaft 15 is fixed with a motor, multiple groups of equally spaced drill string placing positions can be set around the rotary shaft 15, wherein the number of the drill string placing positions is set according to needs, each placing position includes a plate spring 13 and two pairs of buckles 14, the two pairs of buckles 14 are respectively fixed on the top plate and the bottom plate, the middle section of the plate spring 13 is fixed on the rotary shaft 15, and two ends of the plate spring 13 face the directions of the buckles 14.
The rotary rake can rotate around the axis thereof through the motor, and the motor is controlled to rotate by a certain angle, so that the manipulator 5 can take out from the fixed position thereof every time, each placement position can radially place two or more single drill strings 7 along the rotary shaft 15, two layers are shown in the figure, namely, an inner layer and an outer layer, when the single drill strings 7 are clamped in the buckles 14, two ends of the plate spring 13 are extruded on the single drill strings 7 of the inner layer, and when the single drill strings 7 of the outer layer are taken out from the fixed position of the rotary rake by the manipulator 5, the single drill strings 7 of the inner layer can automatically move to the outer layer under the action of the plate spring 13 to wait for the next taking out of the manipulator 5. The thrust of the plate spring 13 can be set according to the requirement, so that the single drill string 7 can be smoothly pushed out under the action of the manipulator 5, and the single drill string 7 can be smoothly fed in under the action of the manipulator 5.
As shown in fig. 4 to 6, the upper hydraulic pliers 3 and the lower hydraulic pliers 1 each comprise three telescopic hydraulic cylinders 11 fixed around an axis, and the tail end of each telescopic hydraulic cylinder 11 is fixed with a pliers tooth 10; the telescopic cylinder 11 of the upper hydraulic tong 3 is fixed on the extension line of the rotary central tube 41, the telescopic cylinder 11 of the upper hydraulic tong 3 is fixed on the rotary central tube 41 by a fixing element, and the fixing element is fixed on the non-threaded part of the rotary central tube 41.
The second technical scheme of the invention is that a drill string transmission, connection and drilling method for submarine in-situ drilling operation comprises the following steps:
Step 1, an underwater top drive 4 ascends to a high position in a guide rail 2 through gear-rack transmission, an upper telescopic arm 51 and a lower telescopic arm 52 simultaneously extend out after a mechanical arm 5 rotates to a set position, a single drill string 7 with a drill bit is taken out of a second rotary rake 9, and the single drill string is transferred to the position right below an upper hydraulic clamp 3 at the center of a wellhead;
Step 2, three telescopic hydraulic cylinders 11 of the upper hydraulic clamp 3 retract synchronously, clamp teeth 10 are opened, the underwater top drive 4 slowly descends until the clamp teeth 10 can be clamped to the top joint of the single drill string 7, then the three telescopic hydraulic cylinders 11 extend synchronously, and the clamp teeth 10 clamp the top joint of the single drill string 7; the upper and lower telescopic arms 51, 52 of the robot 5 are then simultaneously opened and retracted, rotated about their own axes to a position for taking a drill string, and then the upper and lower telescopic arms 51, 52 are simultaneously extended, gripping and taking a single drill string 7 from the first or second rotating rake 8, 9, and then returning to the waiting position 12, as shown in fig. 7 and 8.
Step 3, three telescopic hydraulic cylinders 11 of the lower hydraulic clamp 1 retract synchronously, clamp teeth 10 are opened, the underwater top drive 4 slowly descends for a certain distance until the lower part of the single drill string 7 passes through the lower hydraulic clamp 1, then the three telescopic hydraulic cylinders 11 extend synchronously, and the clamp teeth 10 clamp the lower pipe body of the single drill string 7;
Step 4, three telescopic hydraulic cylinders 11 of the upper hydraulic tongs 3 retract synchronously, the tongs teeth 10 are opened, a hydraulic motor of the underwater top drive 4 is started, the upper hydraulic tongs 3 fixedly connected with the lower end of the rotary central tube 41 is driven to rotate at a low speed, the underwater top drive 4 simultaneously slowly descends, and the lower end of the rotary central tube 41 and the threaded joint at the upper end of the single drill string 7 are screwed together until the threaded joint is screwed together to a set torque value;
step 5, three telescopic hydraulic cylinders 11 of the lower hydraulic clamp 1 retract synchronously, clamp teeth 10 are opened, the underwater top drive 4 continues to drill at a lower running operation according to a set speed, and drilling is stopped when the lower end of the upper hydraulic clamp 3 is close to the upper end of the lower hydraulic clamp 1; the transfer, connection and drilling operations of the 1 st single drill string 7 are completed.
Step 6, the three telescopic hydraulic cylinders 11 of the lower hydraulic tongs 1 extend synchronously, the tongs teeth 10 clamp the single drill string 7, the rotary central tube 41 of the underwater top drive 4 rotates reversely to disconnect the connecting threads with the single drill string 7, and meanwhile, the underwater top drive 4 moves upwards slowly until the connecting threads are completely disconnected;
Step 7, the underwater top drive 4 slowly rises to a high position in the guide rail 2 through gear-rack transmission;
step 8, the manipulator 5 at the waiting position 12 clamps the single drill string 7, rotates around the axis of the manipulator to the direction of the central line of the wellhead, and the upper telescopic arm 51 and the lower telescopic arm 52 extend simultaneously to transfer the single drill string 7 to the position right below the upper hydraulic clamp 3; thus, the transfer of the 2 nd single drill string 7 is completed;
Step 9, repeating the steps 2 to 5, and completing the connection and drilling operation of the 2 nd single drill string 7; the upper telescopic arm 51 and the lower telescopic arm 52 of the manipulator 5 retract and swing to the waiting position 12; and repeating the steps 2-5 to transfer, connect and drill the residual single drill string 7 until the target well drilling operation is completed.
The third technical scheme of the invention is that a method for tripping, disassembling and discharging a drill string for submarine in-situ drilling operation comprises the following steps:
Step 1, after drilling operation is completed, lifting a drill string pipe string, synchronously extending a telescopic hydraulic cylinder 11 of a lower hydraulic clamp 1, clamping a drill string by clamp teeth 10, reversely rotating a rotary central pipe 41 of an underwater top drive 4, disconnecting connecting threads with a single drill string 7, and simultaneously, slowly lifting the underwater top drive 4 until the connecting threads are completely disconnected;
Step 2, three telescopic hydraulic cylinders 11 of an upper hydraulic clamp 3 extend synchronously, clamp teeth 10 clamp the upper part of a drill string, an underwater top drive 4 slowly ascends in a guide rail 2 through gear-rack transmission, the drill string in a well bore is lifted up until a single drill string 7 is lifted up from the well bore, a lower connecting joint is positioned above a lower hydraulic clamp 1, and a specific position reference set value is obtained;
Step 3, three telescopic hydraulic cylinders 11 of the lower hydraulic clamp 1 extend synchronously, clamp teeth 10 clamp a drill string at the center of a wellhead, a rotary central pipe 41 of an underwater top drive 4 drives the upper hydraulic clamp 3 to rotate reversely, and a connecting threaded joint of a single drill string 7 and a drill string pipe string in a well hole is disconnected;
step 4, the manipulator 5 rotates from the waiting position 12 to the wellhead central line direction, synchronously stretches out an upper telescopic arm 51 and a lower telescopic arm 52, clamps a single drill string 7, then three telescopic hydraulic cylinders 11 of the upper hydraulic clamp 3 synchronously retract, clamp teeth 10 are loosened, the manipulator 5 clamps the single drill string 7 to be transferred to a first rotary rake 8 or a second rotary rake 9, then the upper telescopic arm 51 and the lower telescopic arm 52 of the manipulator 5 retract, and the manipulator returns to the waiting position 12; thus, the tripping, dismantling and discharging operations of a single drill string 7 are completed;
Step5, the underwater top drive 4 descends until the clamp teeth 10 of the upper hydraulic clamp 3 can be clamped to the top joint of the drill string in the well bore;
And 6, repeating the steps 2 to 4 to carry out the tripping, disassembling and discharging operations of the 2 nd single drill string 7, and repeating the steps 2 to 4 to complete the tripping, disassembling and discharging operations of all the drill strings.
Claims (7)
1. The drilling and tripping device for the submarine in-situ drilling operation is characterized by comprising a base (6), wherein a wellhead hole is formed in the base (6), a lower hydraulic clamp (1) is fixed at the edge of the wellhead hole in the base (6), a guide rail (2) is fixed on the base (6), the guide rail (2) is connected with an underwater top drive (4) through a gear rack, the underwater top drive (4) comprises a rotary central tube (41), the bottom of the rotary central tube (41) is of an external thread structure, an upper hydraulic clamp (3) is fixed on the rotary central tube (41), and the center of the rotary central tube (41), the center of the upper hydraulic clamp (3), the center of the lower hydraulic clamp (1) and the wellhead hole are arranged on the same axis;
The base (6) is also fixedly provided with a manipulator (5) and a rotary rake, the manipulator (5) can stretch out and draw back in a rotary mode, and the rotary rake and the rotary central tube (41) are arranged in threads which can be rotated and grasped by the manipulator (5).
2. The tripping and drilling device for submarine in-situ drilling operation according to claim 1, wherein the rotary rake comprises a rotary shaft (15), a top plate and a bottom plate are respectively fixed at two ends of the rotary shaft (15), a motor is fixed at one end of the rotary shaft (15), drill string placement positions are uniformly arranged around the rotary shaft (15), each placement position comprises two pairs of buckles (14) and a plate spring (13), the two pairs of buckles (14) are respectively fixed on the top plate and the bottom plate, the middle section of the plate spring (13) is fixed on the rotary shaft (15), and two ends of the plate spring (13) face the directions of the buckles (14).
3. A tripping and drilling device for subsea in situ drilling operations according to claim 1, characterized in that said upper hydraulic clamp (3) and lower hydraulic clamp (1) each comprise said three telescopic cylinders (11) fixed about an axis, each of said telescopic cylinders (11) being fixed at its end with a clamp tooth (10).
4. A tripping and drilling device for subsea in situ drilling operations according to claim 3, characterized in that the telescopic hydraulic cylinders (11) of the upper hydraulic clamp (3) are fixed on the extension of the rotating central tube (41), the telescopic hydraulic cylinders (11) of the upper hydraulic clamp (3) being fixed on the rotating central tube (41) by means of a fixing element fixed on the non-threaded portion of the rotating central tube (41).
5. A tripping and drilling device for subsea in situ drilling operations according to claim 3, characterized in that the manipulator (5) comprises a spindle (53), on which spindle (53) an upper telescopic arm (51) and a lower telescopic arm (52) are fixed.
6. A method of drill string transfer, connection and drilling for subsea in situ drilling operations, characterized by using a tripping and drilling device according to any of claims 3-5 for subsea in situ drilling, comprising the steps of:
step 1, an underwater top drive (4) ascends to a high position in a guide rail (2) through gear and rack transmission, a mechanical arm (5) stretches out after rotating to a set position, a single drill string (7) with a drill bit is taken out of a rotating rake rack, and is transferred to the position right below an upper hydraulic clamp (3) at the center of a wellhead;
Step 2, the clamp teeth (10) of the upper hydraulic clamp (3) are opened, the underwater top drive (4) slowly descends until the clamp teeth (10) are clamped to the top joint of the single drill string (7), then three telescopic hydraulic cylinders (11) synchronously extend, and the clamp teeth (10) clamp the top joint of the single drill string (7); the manipulator (5) is then opened and retracted, rotated about its own axis to a position for taking the drill string, and the manipulator (5) is then extended, gripping and taking the single drill string (7) from the rotating rake, and then returned to the waiting position (12);
step 3, three telescopic hydraulic cylinders (11) of the lower hydraulic clamp (1) retract synchronously, clamp teeth (10) are opened, the underwater top drive (4) slowly descends to the lower part of the single drill string (7) to penetrate through the lower hydraulic clamp (1), then the three telescopic hydraulic cylinders (11) extend synchronously, and the clamp teeth (10) clamp the lower pipe body of the single drill string (7);
Step 4, three telescopic hydraulic cylinders (11) of the upper hydraulic clamp (3) retract synchronously, clamp teeth (10) are opened, a hydraulic motor of the underwater top drive (4) is started, the upper hydraulic clamp (3) fixedly connected with the lower end of the rotary central tube (41) is driven to rotate at a low speed, the underwater top drive (4) slowly descends, and the lower end of the rotary central tube (41) and the threaded joint at the upper end of the single drill string (7) are screwed together until the threaded joint is screwed to a set torque value;
Step 5, three telescopic hydraulic cylinders (11) of the lower hydraulic clamp (1) retract synchronously, clamp teeth (10) are opened, the underwater top drive (4) continues to perform drilling operation at a set speed, and drilling is stopped when the lower end of the upper hydraulic clamp (3) is close to the upper end of the lower hydraulic clamp (1); thus, the transmission, connection and drilling operation of the first single drill string (7) are completed;
Step 6, three telescopic hydraulic cylinders (11) of the lower hydraulic clamp (1) extend out synchronously, clamp teeth (10) clamp a single drill string (7), a rotary central tube (41) of the underwater top drive (4) rotates reversely to disconnect connecting threads with the single drill string (7), and meanwhile the underwater top drive (4) moves upwards slowly until the connecting threads are completely disconnected;
step 7, the underwater top drive (4) slowly rises to a high position in the guide rail (2) through gear-rack transmission;
Step 8, the manipulator (5) at the waiting position (12) clamps the single drill string (7), rotates around the axis of the manipulator to the direction of the central line of the wellhead, and the manipulator (5) stretches out to move the single drill string (7) to the position right below the upper hydraulic clamp (3); thus, the transfer of the second single drill string (7) is completed;
step 9, repeating the steps 2 to 5, so as to finish the connection and drilling operation of the second single drill string (7); the manipulator (5) retracts and rotates to a waiting position (12); and (5) repeating the steps from 2 to 5 to carry out the transmission, connection and drilling operation of the residual single drill string (7) until the target well drilling operation is completed.
7. A method of tripping, dismantling and discharging a drill string for use in subsea in situ drilling operations, characterized in that the tripping and drilling device for use in subsea in situ drilling as claimed in any of claims 3-5 is used for the operations comprising the steps of:
step 1, after drilling operation is completed, lifting a drill string pipe string, synchronously extending a telescopic hydraulic cylinder (11) of a lower hydraulic clamp (1), clamping a drill string by clamp teeth (10), reversely rotating a rotary central pipe (41) of an underwater top drive (4), disconnecting a connecting thread with a single drill string (7), and simultaneously, slowly ascending the underwater top drive (4) until the connecting threads are completely disconnected;
Step 2, three telescopic hydraulic cylinders (11) of an upper hydraulic clamp (3) extend synchronously, clamp teeth (10) clamp the upper part of a drill string, an underwater top drive (4) slowly ascends in a guide rail (2) through gear rack transmission, a drill string pipe string in a well bore is lifted up until a single drill string is lifted up from the well bore, a lower connecting joint is positioned above a lower hydraulic clamp (1), and a specific position reference is set up value;
step3, three telescopic hydraulic cylinders (11) of the lower hydraulic clamp (1) extend out synchronously, clamp teeth (10) clamp a drill string at the center of a wellhead, a rotating central tube (41) of an underwater top drive (4) drives the upper hydraulic clamp (3) to rotate reversely, and a connecting threaded joint of a single drill string (7) and a drill string tube string in a borehole is disconnected;
Step 4, the mechanical arm (5) rotates to the central line direction of the wellhead from a waiting position (12), stretches out an upper telescopic arm (51) and a lower telescopic arm (52) to clamp a single drill string (7), then three telescopic hydraulic cylinders (11) of the upper hydraulic clamp (3) retract synchronously, the clamp teeth (10) are loosened, the mechanical arm (5) clamps the single drill string (7) and transfers to a rotating pipe rack, then the mechanical arm (5) retracts, and the mechanical arm returns to the waiting position (12); thus, the tripping, dismounting and discharging operations of a single drill string (7) are completed;
step 5, the underwater top drive (4) descends until the clamp teeth (10) of the upper hydraulic clamp (3) are clamped to the top joint of the drill string in the well bore;
Step 6, repeating the steps 2 to 4 to carry out the operations of tripping, dismounting and discharging of the second single drill string (7); and (5) repeating the steps 2-4 to finish the tripping, dismantling and discharging operations of all the drill strings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211268112.6A CN117927142A (en) | 2022-10-17 | 2022-10-17 | Tripping and drilling device for submarine in-situ drilling and operation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211268112.6A CN117927142A (en) | 2022-10-17 | 2022-10-17 | Tripping and drilling device for submarine in-situ drilling and operation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117927142A true CN117927142A (en) | 2024-04-26 |
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ID=90767072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211268112.6A Pending CN117927142A (en) | 2022-10-17 | 2022-10-17 | Tripping and drilling device for submarine in-situ drilling and operation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117927142A (en) |
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2022
- 2022-10-17 CN CN202211268112.6A patent/CN117927142A/en active Pending
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