CN116291208A - Armored cable suspension type pressure-maintaining ball valve overturning type pressure-maintaining coring ocean drilling tool - Google Patents

Abstract

The invention discloses an armored cable suspension type pressure-maintaining ball valve overturning pressure-maintaining coring ocean drilling tool which comprises an armored cable, a cable connecting part, a slip ring assembly, a counter-torsion device, a high-pressure sealing cabin body, a counterweight device, a driving circulation device, a rock debris pipe, a lifting mechanism, a buffer mechanism, a pressure-maintaining core sampling pipe, a pressure-maintaining ball valve device, an outer pipe and a bottom coring drill bit. The invention can replace the conventional drill rod to lower and lift, and can simultaneously carry out pressure maintaining and coring on the electromechanical drilling tool. The invention combines the structure of the armored cable type electric mechanical drilling tool for the polar region and the requirements and characteristics of deep sea scientific drilling, replaces a drill rod by a cable, is combined with the pressure-maintaining ball valve, has the pressure-maintaining and coring functions, and simultaneously saves the lifting and lowering time of the drilling tool, thereby saving the construction time, saving the construction cost, improving the construction efficiency and providing more technical support for realizing the Chinese ocean scientific drilling target.

Description

Armored cable suspension type pressure-maintaining ball valve overturning type pressure-maintaining coring ocean drilling tool

Technical Field

The invention relates to the technical field of deep sea drilling coring, in particular to a pressure-maintaining coring sea drilling tool.

Background

The global land area is less than three of the earth's surface area, the rest is sea, and for sustainable development of the earth, research by land alone is insufficient, and research into the deep sea field is favored next. By researching the deep sea, the method recognizes the sea bottom expansion, explores the origin of continental mountain system, interprets the sea bottom sediment process, finds the source of climate evolution, and ocean drilling is the only method for directly acquiring the physical data of the earth deep part at present.

Since 1968, international ocean drilling has performed four stages in succession, "deep sea drilling plan (DSDP, 1968-1983)", "ocean drilling plan (ODP, 1985-2003)", "integrated ocean drilling plan (IODP, 2003-2013)", and "international ocean discovery plan (IODP, 2013-2023)". Over 50 years in world ocean science drilling, near four thousand ports are drilled in each ocean worldwide, and more than sixty thousand meters of cores and a large amount of data are acquired. The geological data provide important references for verifying submarine expansion and plate structure, revealing weather evolution rules, researching submarine sediment effect and submarine mineral distribution, discovering deep biosphere and combustible ice, and the like. However, in the process that the core sample is lifted to the deck along with the drilling tool, internal bubbles or certain components are continuously decomposed along with the reduction of pressure, so that the physicochemical properties inside the core sample are changed, corresponding geoscience information cannot be accurately reflected, and the acquisition of the submarine pressure-maintaining core is extremely critical.

Meanwhile, in the implementation of pressure maintaining rock core sampling process of ocean science drilling, the condition of 2 months operation in the northern hemisphere from 10 months to the second year (corresponding to 4 months to 8 months in the southern hemisphere sea area) is often faced, typhoons in the stage are more, the window period of offshore construction is shorter, often only a few days, for the submarine drilling operation with the depth of 2000 meters, the conventional drilling tool is required to take at least three days for lowering and lifting a drill rod, the operation difficulty is increased due to the severe environment and the shorter operation window period, even the operation is forced to be terminated, and the task can only be carried out in the second year. In addition, the daily cost of the offshore construction operation reaches millions of RMB. Therefore, the operation time for lowering and lifting the drill rod is saved, and the operation cost can be greatly saved.

Therefore, in the drilling of the ocean science, especially in the face of the situation that the working window period is shorter during the period from 10 months to 2 months in the northern hemisphere sea area (corresponding to 4 months to 8 months in the southern hemisphere sea area), the working water depth is deeper (more than 1000 m), and the seabed drilling depth is shallower (less than 500 m), the conventional seabed drilling sampling and conventional pressure maintaining coring method can cause that the drilling operation cannot be successfully completed in a large probability due to longer time of connecting, lowering and lifting the drill rod, so that a set of drilling tool equipment for taking the core device to the seabed by replacing the drill rod with a cable is needed to be designed, and the bottom drill bit can be driven to drill simultaneously, and the bottom of the hole can be lifted to an operation platform along with the sampling tube after the pressure maintaining sampling is completed.

Disclosure of Invention

The invention aims to provide an armored cable suspension type pressure-maintaining ball valve overturning pressure-maintaining coring ocean drilling tool, which solves one or more technical problems in the prior art and at least provides a beneficial selection or creation condition.

In order to solve the technical problems, the invention adopts the following technical scheme:

the armored cable suspension type pressure-maintaining ball valve overturning type pressure-maintaining coring ocean drilling tool comprises an armored cable, a cable connecting component, a slip ring component, an anti-torsion device, a high-pressure sealing cabin body, a counterweight device, a driving circulation device, a rock chip pipe, a lifting mechanism, a buffer mechanism, a pressure-maintaining core sampling pipe, a pressure-maintaining ball valve device, an outer pipe and a bottom coring bit, wherein the cable connecting component, the slip ring component, the anti-torsion device, the high-pressure sealing cabin body, the counterweight device, the driving circulation device, the rock chip pipe, the outer pipe and the bottom coring bit are sequentially connected, the lifting mechanism, the buffer mechanism, the pressure-maintaining core sampling pipe and the pressure-maintaining ball valve device are arranged in the outer pipe, a plurality of power wires and signal wires are arranged in the armored cable, the middle of the armored cable is wrapped by a high-pressure-resistant corrosion-resistant sealing nylon layer, and a plurality of steel wire winding and wrapping layers are arranged outside the armored cable; the two power lines sequentially penetrate through the cable connecting component, the slip ring component, the anti-torsion component, the high-pressure sealing cabin body and the internal channel of the counterweight component, one power line is connected to a motor in the driving circulation device for driving the lower drilling tool to rotate and the water pump below to circulate drilling fluid, and the other power line is always connected to the motor of the lifting mechanism downwards for driving the built-in lifting winch at the lower part to operate; the signal wire sequentially passes through the cable connecting component, the slip ring component and the internal channel of the anti-torsion component until being connected to the electronic component in the high-pressure sealing cabin.

Further, the cable connecting part is used for connecting the bottom of the armored cable, and the inside of the cable connecting part can fixedly clamp the armored cable and simultaneously transmit the power line and the signal line from the inside of the cable connecting part to the lower part; the rolling bearing and the tapered roller bearing are arranged in the middle of the upper part and the lower part of the inner part of the slip ring assembly, so that when the drilling tool part at the lower part of the slip ring assembly rotates, the upper part cannot rotate along with the lower drilling tool, and therefore an armored cable is wound and damaged; the anti-torsion device is positioned at the lower end of the slip ring component, the periphery of the anti-torsion device is connected with a plurality of anti-torsion cutters through a connecting rod mechanism, the number of the anti-torsion cutters is more than or equal to 3, and the radial extension degree of the anti-torsion cutters can be adjusted through a lower lock nut and an anti-torsion spring, so that the anti-torsion device can be adjusted; the upper end and the lower end of the reverse twisting knife are arc-shaped, so that the reverse twisting knife is convenient to enter and lift out a drilled hole.

Furthermore, the high-pressure sealed cabin is used for storing the control and detection system in the drilling tool, and a plurality of electronic components are arranged in the high-pressure sealed cabin through the fixing mechanism, and the high-pressure sealed cabin comprises a temperature sensor, a pressure sensor, an azimuth sensor and other sensor elements and a device for partially monitoring the state of the hole bottom, can not leak in a high-pressure liquid environment, prevents drilling fluid from entering the high-pressure sealed cabin to damage a circuit board, and can also reduce the pressure-resistant requirement on the electronic components; the signals are connected through the signal wires and transmitted to the control console of the drilling platform.

Further, the counterweight device can be internally added with different numbers of counterweights according to the requirement, so that the maximum weight on bit during each tripping can be adjusted.

Further, the driving circulation device mainly comprises a motor, a driving speed reducer, a water pump and other mechanical structures for fixing the equipment, and is used as a connecting part to connect an upper drilling tool, a lower rock chip pipe, a built-in lifting mechanism, a pressure-maintaining rock core sampling pipe and a bottom coring drill; the motor and the driving speed reducer can be used as a power component for driving the lower coring drilling tool to rotate at the bottom of the hole, and the rotary power and torque can be transmitted to the lower part of the drilling tool; the water pump can collect the drilling fluid carrying the rock debris into the corresponding rock debris pipe through the circulating channel by pumping action.

Further, the pressure-maintaining ball valve device comprises a pressure-bearing spring limiting ring, an upper pressure-bearing spring, an upper pressure-maintaining ball valve seat, a pressure-maintaining ball valve, a lower pressure-maintaining ball valve seat, a lower pressure-bearing spring, a lower spring limiting pipe, a pressure-maintaining ball valve outer pipe and a pressure-maintaining ball valve shaft, wherein the outer wall of the pressure-maintaining ball valve outer pipe is provided with two slotted holes, so that the pressure-maintaining ball valve shaft can conveniently rotate and slide up and down; the pressure maintaining ball valve is abutted against the upper pressure maintaining ball valve seat and the lower pressure maintaining ball valve seat from top to bottom respectively, and meanwhile, the pressure maintaining ball valve is fixedly provided with a pressure maintaining ball valve shaft and corresponding arc slotted holes, so that the pressure maintaining ball valve can conveniently overturn along the arc slotted hole track of the pressure maintaining ball valve after being subjected to axial thrust, and the pressure maintaining ball valve is provided with a through hole, so that a pressure maintaining rock core sampling tube can conveniently pass through the pressure maintaining ball valve; when the pressure maintaining ball valve is subjected to pressure maintaining operation, the pressure maintaining ball valve can slide downwards and turn over for 90 degrees; the upper pressure-maintaining ball valve seat is propped against the lower end of the upper pressure-bearing spring, the lower pressure-maintaining ball valve seat is propped against the upper end of the lower pressure-bearing spring, and the upper pressure-maintaining ball valve seat and the lower pressure-maintaining ball valve seat can axially slide in the outer tube.

Further, the specific implementation process of realizing that the pressure maintaining ball valve slides downwards and overturns by 90 degrees by mutually matching the pressure maintaining ball valve with the pressure maintaining rock core sampling pipe is as follows: before coring and salvaging, the pressure maintaining core sampling pipe downwards passes through a hollow channel of the pressure maintaining ball valve, the edge of the pressure maintaining ball valve is tightly attached to the pressure maintaining core sampling pipe, the outer wall of the pressure maintaining core sampling pipe limits the downward overturning of the pressure maintaining ball valve, meanwhile, the pressure maintaining ball valve is contacted by the pressure maintaining core sampling pipe so that the pressure maintaining ball valve upwards abuts against an upper pressure maintaining ball valve seat, the upper pressure maintaining ball valve seat upwards abuts against an upper pressure bearing spring, the upper pressure bearing spring is limited by a pressure bearing spring limiting ring, and the spring is compressed so that the elastic potential energy is increased; when coring is completed and pressure maintaining is needed, the built-in lifting winch drives the pressure maintaining rock core sampling pipe to lift upwards through control, after the pressure maintaining rock core sampling pipe passes through the through hole of the pressure maintaining ball valve, the pressure maintaining rock core sampling pipe does not limit the pressure maintaining ball valve to overturn downwards any more, the spring with enough elastic potential energy has the spring thrust larger than the lower bearing spring thrust, the pressure maintaining ball valve moves downwards along the long round hole of the pressure maintaining ball valve pipe integrally under the thrust given by the spring at the moment, the pressure maintaining ball valve moves downwards in the process, the pressure maintaining ball valve overturning sliding groove is caused to slide and rotate around the pressure maintaining ball valve overturning driving pin fixed on the pressure maintaining ball valve pipe, meanwhile, the pressure maintaining ball valve overturning torque is given to the pressure maintaining rock valve overturning 90 degrees, and when the pressure maintaining reaches the descending limit position, the lower pressure bearing spring is compressed.

Further, the upper end of pressurize rock core sampling tube is equipped with the connection nipple joint, and the upper end of connection nipple joint is equipped with ball valve sealing member, ball valve sealing member includes ball disk seat and ball valve, and the ball valve is established in the ball disk seat, a plurality of claw springs of peripheral distribution of the lower port of pressurize rock core sampling tube.

Further, the lifting mechanism comprises a motor, a coupler C, a lifting mechanism speed reducer, a coupler D, a vertical worm, a transverse turbine, an internal lifting winch and a displacement encoder, wherein the motor, the coupler C, the lifting mechanism speed reducer, the coupler D, the vertical worm, the transverse turbine, the internal lifting winch and the displacement encoder are arranged in the outer tube, the motor is connected with the lifting mechanism speed reducer through the coupler C, the lifting mechanism speed reducer is connected with the vertical worm through the coupler D, the vertical worm is meshed with the transverse turbine, the transverse turbine is arranged on a rotating shaft of the internal lifting winch, the rotating shaft is sleeved on an internal winch fixing shaft, the internal winch fixing shaft is arranged on the tube wall of the outer tube, a steel cable on the internal lifting winch is connected with a hanging ring at the top of a pressure maintaining ball valve sealing component, and the displacement encoder is arranged on one side of the internal lifting winch and used for recording the steel cable displacement of the internal lifting winch, and the displacement encoder transmits signals to a control console through a signal wire.

Further, the buffer mechanism is arranged in the outer tube and comprises a buffer spring, a buffer inner tube, an upper limiting ring and a lower limiting tube, wherein the buffer spring is sleeved on the periphery of the buffer inner tube, the lower end of the buffer spring is propped against a bulge at the lower end of the buffer inner tube, the upper end of the buffer spring is propped against the upper limiting ring, and the lower end of the bulge of the buffer inner tube is propped against the lower limiting tube; the lower end of the buffering inner tube is sleeved with a rubber pad for buffering the impact of the pressure-maintaining core sampling tube.

The invention has the beneficial effects that:

the invention provides an electromechanical drilling tool which is used in ocean drilling, can replace the conventional drill rod to lower and lift and can simultaneously perform pressure maintaining and coring when facing the conditions that the offshore operation window period is shorter, the operation water depth is more than 1000m and the submarine drilling depth is less than 500 m. The drilling tool replaces a drill rod with a cable, and can drive the bottom coring bit to drill at the same time, and after sampling is completed, the drilling tool can be lifted away from the bottom of the hole along with the sampling tube to an operating platform. After each coring time is finished, the whole set of drilling tool can be lifted onto the deck surface of the drilling ship along with the armored cable, and the subsequent study can be carried out by disassembling the pressure-maintaining core sampling tube of the pressure-maintaining drilling tool and placing the pressure-maintaining core sampling tube in the corresponding pressure-maintaining cabin; the drilling tool can be replaced in time when the drilling tool is worn out, so that the time for lifting and lowering the drilling tool is greatly saved in the drilling operation of the ocean science with a short window period, the process that the whole set of drilling tool needs to be lifted away from the deck of the drilling ship due to accidents such as the wearing of the drilling tool is simplified, the construction time is saved, the construction cost is saved, the construction efficiency is improved, and more technical support is provided for realizing the drilling target of the ocean science in China.

Drawings

The invention will be further described with reference to the accompanying drawings, in which embodiments do not constitute any limitation of the invention, and other drawings can be obtained by one skilled in the art without inventive effort from the following figures:

FIG. 1 is a schematic diagram of the structure of the invention before pressure maintaining;

FIG. 2 is a schematic diagram of the structure of the present invention after pressure maintaining;

fig. 3 is a schematic structural view of the pressure maintaining ball valve shown in fig. 1.

In the figure: 1-armoured cable; 2-a cable connection component; 3-a spring; 4-armoured cable locking device; a 5-slip ring assembly; 6-a reverse twisting device; 7-turning the cutter reversely; 8-a torsion spring; 9-locking the nut; 10-sealing the cabin under high pressure; 11-electronic components; 12-a fixing mechanism; 13-a counterweight device; 14-balancing weight; 15-a power line crossing hole; 16-an electric motor; 17-coupling a; 18-a drive reducer; 19-a coupling B; 20-a water pump; 21-a signal line and a power line; 22-umbrella-shaped rock scraps blocking head; 23-rock debris pipe; 24-a rock debris return pipe; 25-a lower end cover of the rock debris pipe; 26-an electric motor; 27-coupling C; 28-a hoist mechanism reducer; 29-coupling D; 30-a vertical worm; 31-a transverse turbine; a 32-displacement encoder; 33-a built-in winch fixing shaft; 34-built-in hoisting winch; 35-a rotation axis; 36-a wire rope; 37-buffer inner tube; 38-an upper stop collar; 39-buffer springs; 40-lower limiting tube; 41-hanging rings; 42-ball valve sealing member; 43-ball valve; 44-ball valve seat; 45-connecting pup joint; 46-pressure maintaining core sampling tubes; 47-a pressure-bearing spring limiting ring; 48-upper pressure spring; 49-upper pressure-maintaining ball valve seat; 50-pressure maintaining ball valve; 51-a pressure maintaining ball valve shaft; 52-slots; 53-lower pressure-maintaining ball valve seat; 54-lower pressure spring; 55-lower spring stop tube; 56-an outer tube; 57-pawl springs; 58-a bottom coring bit 59, an arc-shaped slotted hole; 60. a mounting hole; 61. and a through hole.

Description of the embodiments

In order to better understand the technical solutions of the present invention, the following description will be made in detail with reference to the accompanying drawings and specific embodiments, and it should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper surface", "lower surface", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "forward rotation", "reverse", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

As shown in fig. 1, the armored cable suspension type pressure-maintaining ball valve turnover pressure-maintaining coring ocean drilling tool comprises an armored cable 1, a cable connecting part 2, a slip ring assembly 5, a back-twisting device 6, a high-pressure sealing cabin body 10, a counterweight device 13, a driving circulation device, a rock debris pipe 23, a lifting mechanism, a buffer mechanism, a pressure-maintaining core sampling pipe 46, a pressure-maintaining ball valve device, an outer pipe 56 and a bottom coring drill bit 58, wherein a spring 3 and an armored cable locking device 4 are arranged in the cable connecting part 2. The armored cable 1 is internally provided with a plurality of power lines and signal lines 21, the middle is wrapped by a high-voltage-resistant corrosion-resistant sealing nylon layer, and the outer part is wrapped by a plurality of steel wires; the two power lines sequentially pass through the cable connecting component 2, the slip ring component 5, the anti-twisting device 6, the high-pressure sealing cabin body 10 and the counterweight device 13, one power line is connected to a motor 16 in the driving circulation device for driving the lower drilling tool to rotate and the water pump 20 below to circulate drilling fluid, and the other power line is directly connected to a motor 26 of the lifting mechanism downwards for driving the built-in lifting winch 34 at the lower part to operate; the signal wires sequentially pass through the internal channels of the cable connecting part 2, the slip ring part 5 and the anti-torsion part 6 and are connected to various electronic components 11 in the high-pressure sealed cabin body 10. The bottom coring bit 58 is disposed at the lower end of the outer tube 56, and the lifting mechanism, the buffer mechanism, the pressure maintaining core sampling tube 46 and the pressure maintaining ball valve device are disposed in the outer tube 56.

The cable connecting part 2 is used for connecting the bottom of the armored cable 1, and can fixedly clamp the armored cable 1 and simultaneously transmit power lines and signal lines from the inside to the lower part; the rolling bearing and the tapered roller bearing are arranged in the middle of the upper part and the lower part of the inner part of the slip ring assembly 5, so that when the drilling tool part at the lower part of the slip ring assembly rotates, the upper part cannot rotate along with the lower drilling tool, and therefore an armored cable is wound and damaged; the anti-torsion device 6 is positioned at the lower end of the slip ring component for balancing the torque generated during drilling, the periphery of the anti-torsion device is connected with a plurality of anti-torsion cutters 7 through a connecting rod mechanism, the number of the anti-torsion cutters 7 is more than or equal to 3, and the radial stretching degree of the anti-torsion cutters 7 can be adjusted through a lower locking nut 9 and an anti-torsion spring 8, so that the anti-torsion device can be adjusted; the upper end and the lower end of the reverse torque cutter 7 are arc-shaped, so that the reverse torque cutter is convenient to enter and lift out of a drilled hole.

The high-pressure sealed cabin 10 is used for storing a control and detection system in a drilling tool, and is internally provided with various electronic components 11 through a fixing mechanism 12, wherein the various sensor elements such as a temperature sensor, a pressure sensor, an azimuth sensor and the like and a device for partially monitoring the state of the hole bottom can not leak in a high-pressure liquid environment, so that drilling fluid is prevented from entering the drilling tool to damage a circuit board, and meanwhile, the pressure resistance requirement on the electronic components can be reduced; the signals are connected through the signal wires and transmitted to the control console of the drilling platform.

The counterweight device 13 can be internally added with different numbers of counterweights 14 according to the needs, and the center of the counterweights 14 is provided with a power line through hole 15, so that the maximum drilling pressure during each tripping can be adjusted.

The driving circulation device mainly comprises a motor 16, a driving speed reducer 18, a water pump 20 and other mechanical structures for fixing the devices, wherein the motor 16 is connected with the driving speed reducer 18 through a coupler A17, and the driving speed reducer 18 is connected with the water pump 20 through a coupler B19. The driving circulation device is used as a connecting part to connect an upper drilling tool, a rock chip pipe at the lower part, a built-in lifting mechanism, a pressure-maintaining rock core sampling pipe and a bottom coring bit 58; the motor 16 and the driving reducer 18 can be used as a power component for driving the lower coring drilling tool to rotate at the bottom of the hole, and can transmit rotary power and torque to the lower part of the drilling tool; the water pump 20 can collect drilling fluid carrying rock cuttings into the corresponding rock cuttings pipe 23 through a circulating channel by pumping action, the upper end of the rock cuttings pipe 23 is connected with the driving circulating device, the lower end of the rock cuttings pipe 23 is connected with the upper end of the outer pipe 34, the inner cavity of the rock cuttings pipe 23 is a rock cuttings chamber, a rock cuttings up-return pipe 24 is arranged in the rock cuttings chamber, the lower end of the rock cuttings up-return pipe 24 is inserted in the lower end cover 25 of the rock cuttings pipe, an umbrella-shaped rock cuttings blocking head 22 is designed at the top end of the rock cuttings up-return pipe 24, the drilling fluid carries the rock cuttings to flow in from the lower end of the rock cuttings up-return pipe 24, and the drilling fluid is discharged into the rock cuttings chamber through a diversion hole on the lower end surface of the umbrella-shaped rock cuttings blocking head 22.

The pressure maintaining ball valve device comprises a pressure-bearing spring limiting ring 47, an upper pressure-bearing spring 48, an upper pressure-maintaining ball valve seat 49, a pressure-maintaining ball valve 50, a lower pressure-maintaining ball valve seat 53, a lower pressure-bearing spring 54, a lower spring limiting pipe 55 and a pressure-maintaining ball valve shaft 51, wherein the outer wall of the outer tube of the pressure-maintaining ball valve is provided with two slotted holes 52, so that the pressure-maintaining ball valve shaft 51 can conveniently rotate and slide up and down, and the pressure-maintaining ball valve shaft 51 is arranged in an installation hole 60 on the pressure-maintaining ball valve 50; the pressure maintaining ball valve 50 is abutted against the upper pressure maintaining ball valve seat 49 and the lower pressure maintaining ball valve seat 53 respectively up and down, meanwhile, the pressure maintaining ball valve 50 is fixedly provided with a pressure maintaining ball valve shaft and a corresponding arc slotted hole 59, the pressure maintaining ball valve is convenient to overturn along the track of the arc slotted hole 59 of the pressure maintaining ball valve 50 after receiving axial thrust, a through hole 61 is formed in the pressure maintaining ball valve, the pressure maintaining core sampling pipe 46 is convenient to pass through the pressure maintaining ball valve, and the pressure maintaining ball valve can slide downwards and overturn by 90 degrees when in pressure maintaining operation; the upper pressure-maintaining ball valve seat is propped against the lower end of the upper pressure-bearing spring, the lower pressure-maintaining ball valve seat is propped against the upper end of the lower pressure-bearing spring, and the upper pressure-maintaining ball valve seat 49 and the lower pressure-maintaining ball valve seat 53 can axially slide in the outer tube. The specific implementation process of realizing that the pressure-maintaining ball valve 50 and the pressure-maintaining rock core sampling tube 46 mutually cooperate to slide downwards and turn over 90 degrees is as follows: in the process of installing a drilling tool, a pressure maintaining rock core sampling pipe downwards passes through a hollow channel of the pressure maintaining ball valve, the edge of the pressure maintaining ball valve 50 is tightly attached to the pressure maintaining rock core sampling pipe, the outer wall of the pressure maintaining rock core sampling pipe limits the downward overturning of the pressure maintaining ball valve, meanwhile, the pressure maintaining ball valve is contacted by the pressure maintaining rock core sampling pipe so that the pressure maintaining ball valve upwards abuts against an upper pressure maintaining ball valve seat, the upper pressure maintaining ball valve seat upwards abuts against an upper pressure bearing spring, the upper pressure bearing spring 48 is limited by a pressure bearing spring limiting ring, and the spring is compressed so that the elastic potential energy is increased; when coring is completed and pressure maintaining is needed, the built-in lifting winch drives the pressure maintaining core sampling pipe to lift upwards through control, after the pressure maintaining core sampling pipe passes through the through hole of the pressure maintaining ball valve, the pressure maintaining core sampling pipe does not limit the downward overturning of the pressure maintaining ball valve any more, the downward thrust of the upper pressure bearing spring 48 with enough elastic potential energy to the pressure maintaining ball valve is larger than that of the lower pressure bearing spring 54, so that the pressure maintaining ball valve moves downwards integrally along the oblong hole of the pressure maintaining ball valve under the downward thrust exerted by the upper pressure bearing spring at the moment, and in the process of moving downwards the pressure maintaining ball valve, the pressure maintaining ball valve overturning sliding groove is caused to slide and rotate around the pressure maintaining ball valve overturning driving pin fixed on the pressure maintaining ball valve pipe to conduct compound movement, meanwhile overturning torque is given to the pressure maintaining ball valve and overturning 90 degrees is driven to the pressure maintaining ball valve overturning, and when the pressure maintaining ball valve reaches the descending limit position, the lower pressure bearing spring is compressed as shown in fig. 2. In essence, the rotation of the pressure-maintaining ball valve is limited by the existence of the middle pressure-maintaining core sampling tube 46, so that after the middle pressure-maintaining core sampling tube 46 is drawn away, the pressure-maintaining ball valve is turned over under the potential energy of the upper pressure-bearing spring 48, thereby realizing the pressure-maintaining function of the pressure-maintaining ball valve.

The upper end of pressurize rock core sampling tube 46 is equipped with and connects nipple joint 45, and the upper end of connecting nipple joint 45 is equipped with ball valve seal member 42, ball valve seal member 42 includes ball valve seat 44 and ball valve 43, and ball valve 43 establishes in ball valve seat 44, and the periphery of the lower port of pressurize rock core sampling tube 46 distributes a plurality of claw springs 57.

The lifting mechanism comprises a motor 26, a coupler C27, a lifting mechanism speed reducer 28, a coupler D29, a vertical worm 30, a transverse turbine 31, a built-in lifting winch 34 and a displacement encoder 32 which are arranged in an outer tube 56, wherein the motor 26 is connected with the lifting mechanism speed reducer 28 through the coupler C27, the lifting mechanism speed reducer 28 is connected with the vertical worm 30 through the coupler D29, the vertical worm 30 is meshed with the transverse turbine 31, the transverse turbine 31 is arranged on a rotating shaft 35 of the built-in lifting winch 34, the rotating shaft 35 is sleeved on a built-in winch fixing shaft 33, the built-in winch fixing shaft 33 is arranged on the tube wall of the outer tube 56, a steel cable 36 on the built-in lifting winch 34 is connected with a lifting ring 41 at the top of a pressure maintaining ball valve sealing component 42, the displacement encoder 32 is arranged on one side of the built-in lifting winch 34 and used for recording the displacement of the steel cable 36 of the built-in lifting winch 34, and the displacement encoder 32 transmits signals to a control console through a signal wire.

The buffer mechanism is arranged in the outer tube 56 and comprises a buffer spring 39, a buffer inner tube 37, an upper limiting ring 38 and a lower limiting tube 40, wherein the buffer spring 39 is sleeved on the periphery of the buffer inner tube 37, the lower end of the buffer spring 39 is propped against a bulge at the lower end of the buffer inner tube 37, the upper end of the buffer spring 39 is propped against the upper limiting ring 38, and the lower end of the bulge of the buffer inner tube 37 is propped against the lower limiting tube 40; the lower end of the buffer inner tube 37 is sleeved with a rubber pad for buffering the impact of the pressure-maintaining core sampling tube.

Working principle: the realization of this patent drilling tool no longer needs the section to connect the drilling rod to descend and promote to can save the operating time of ocean drilling by a wide margin, improve operating efficiency, even decided to a great extent at specific time and specific depth of water operation can be successful. After the drilling tool is assembled, firstly, the submarine base plate is lowered to the seabed mud surface through the drilling ship, then, the drilling tool is lowered along the moon pool of the drilling ship through the armored cable 1, meanwhile, the ROV system is lowered, the armored cable type electric mechanical drilling tool without the drill rod is assisted to be lowered to a preset position, the angle and the position of the ROV auxiliary system are controlled, the armored cable type electric mechanical drilling tool without the drill rod is assisted to smoothly pass through a drilling channel in the middle of the submarine base plate through the mechanical arm, and the drilling tool is kept in a vertical state.

After the electromechanical drilling tool smoothly passes through the drilling channel in the middle of the seabed base and contacts the mud layer on the seabed, one ROV is used for assisting the electromechanical drilling tool to keep in a vertical state, the other ROV is used for clamping the anti-torsion part 6, the motor 16 of the electromechanical drilling tool is controlled to start through the control cabin of the drilling and production ship, the parts at the lower part of the motor 16 comprise a water pump 20, a rock debris pipe (22-25), a lifting mechanism (26-36), a buffer mechanism (37-40), a pressure maintaining core sampling pipe (41-46, 57), a pressure maintaining ball valve device (47-56) and a bottom coring bit 58 start to rotate, and the upper drilling tool part (comprising the cable connecting part 2, the slip ring assembly 5, the anti-torsion device 6, the high-pressure sealing cabin 10, the counterweight device 13 and the motor 16) of the electromechanical drilling tool cannot rotate due to the anti-torsion effect generated by the clamping of the ROV.

As the drilling tool is lowered, the two auxiliary ROVs are also lowered continuously and keep the same with the speed of lowering the drilling tool. When the anti-twisting device 6 of the electromechanical drilling tool enters the seabed base plate, the control cabin of the drilling and production ship controls the auxiliary ROV to loosen the mechanical arm, so that the electromechanical drilling tool can smoothly pass through the seabed base plate; the electromechanical drilling tool can be increased in length by adding a plurality of hollow drill rods with the same outer diameter between the counterweight device 13 and the driving circulation devices (16-20) in the previous drilling process, so that the upper anti-torsion device 6 can still be clamped by the ROV device and has an anti-torsion effect after the drilling tool drills a certain distance on the seabed mud layer. After the drilling tool drills the middle hardness stratum for a certain distance, the hollow drill rods with the upper parts increased are detached, and the drilling tool is lowered again to enable the anti-torsion part 6 to enter the middle hardness stratum, and the anti-torsion blade 7 of the anti-torsion part 6 is wedged into the middle hardness stratum, so that an anti-torsion effect is achieved.

In the rotary coring drilling process, as the drilling tool continuously descends, the core sample continuously enters the pressure-maintaining core sampling tube 46, and rock fragments generated in the drilling process move along with drilling fluid in a local reverse circulation mode at the bottom of the hole, wherein the rock fragments are collected into the rock fragment tube 23, the drilling fluid continuously circulates until the core sampling tube is filled with the core, the driving motor 16 of the electromechanical drilling tool 6 is turned off, and the drilling is stopped.

And after the sampling is finished, performing pressure maintaining operation. Starting the motor 26 of the lifting mechanism, wherein the motor 26 transmits torque and rotation speed downwards through the lifting mechanism speed reducer 27 to the vertical worm 30, and the vertical worm 30 transmits the rotation speed and the torque to the transverse turbine 31; the transverse turbine 31 is fixed with the built-in winch rotating shaft 35 through a spline and is fixedly connected with the built-in lifting winch 34, so that the built-in lifting winch is driven to rotate, the steel cable 36 on the built-in lifting winch 34 starts to wind, and the lower pressure maintaining core sampling tube 46 is lifted upwards after being pulled by the steel cable 36. After the pressure maintaining core sampling tube 46 passes through the pressure maintaining ball valve 50, the pressure maintaining ball valve 50 slides downwards and overturns by 90 degrees under the thrust of the upper pressure bearing spring 48, the pressure maintaining operation of the sample is completed, at this time, the lifting displacement of the steel cable 36 is observed through the displacement encoder 32, after the pressure maintaining core sampling tube 46 passes through the pressure maintaining ball valve 50, the pressure maintaining core sampling tube 46 is continuously lifted upwards by the steel cable 36 until the upper ends of the lifting ring 41 and the lower pressure maintaining core sampling tube abut against the lower end of the inner tube 37 of the buffer mechanism, the buffer spring is not compressed after being stressed and compressed to a certain degree, and at this time, the motor 26 of the built-in lifting mechanism is closed, and the pressure maintaining operation is completed.

After pressure maintaining sampling is completed, the whole set of electric mechanical pressure maintaining coring drilling tool without drill rod is lifted from the hole bottom until the operation platform on the sea surface by lifting the armored cable 1, the subsequent research can be carried out by disassembling the built-in lifting mechanism of the pressure maintaining drilling tool and the pressure maintaining core sampling pipe 46 and placing the built-in lifting mechanism and the pressure maintaining core sampling pipe 46 in corresponding pressure maintaining cabins, and the built-in lifting mechanism, the pressure maintaining core sampling pipe 46 and the lower drilling tool which are assembled are installed on the drilling tool when the pressure maintaining core sampling pipe 46 is disassembled, and the next pressure maintaining drilling operation is started.

In general, the operation water depth of the drilling tool is more than 1000m, the seabed drilling depth is shallower, the drilling tool replaces a drill rod with a cable in the sea area below 500m, and meanwhile, the bottom coring bit can be driven to drill, and after pressure maintaining and sampling are completed, the drilling tool equipment from the bottom of the hole to an operation platform can be lifted along with a sampling pipe. After each coring time is finished, the whole set of drilling tool can be lifted onto the deck surface of the drilling ship along with the armored cable, and the subsequent study can be carried out by disassembling the pressure-maintaining core sampling tube of the pressure-maintaining drilling tool and placing the pressure-maintaining core sampling tube in the corresponding pressure-maintaining cabin; the obtained submarine pressure maintaining sample can greatly improve scientific research value; the drilling tool can be replaced in time when encountering the problems of drill bit abrasion and the like, the success rate of operation under the condition of short window period of offshore operation is greatly improved in the drilling operation of the ocean science with short window period, meanwhile, the time for lifting and lowering the drilling tool is saved, the process that the whole set of drilling tool needs to be lifted to the deck of the drilling ship due to accidents such as drill bit abrasion and the like is simplified, the construction time is saved, the construction cost is saved, the construction efficiency is improved, and more technical support is provided for realizing the drilling target of the ocean science in China.

Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction. While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (10)

1. An armored cable suspension type pressure-maintaining ball valve turnover pressure-maintaining coring ocean drilling tool is characterized in that: the high-pressure anti-corrosion steel wire winding device comprises an armored cable, a cable connecting part, a slip ring assembly, an anti-torsion device, a high-pressure sealing cabin, a counterweight device, a driving circulation device, a rock chip pipe, a lifting mechanism, a buffer mechanism, a pressure maintaining rock core sampling pipe, a pressure maintaining ball valve device, an outer pipe and a bottom core drill bit, wherein the cable connecting part, the slip ring assembly, the anti-torsion device, the high-pressure sealing cabin, the counterweight device, the driving circulation device, the rock chip pipe, the outer pipe and the bottom core drill bit are sequentially connected, the lifting mechanism, the buffer mechanism, the pressure maintaining rock core sampling pipe and the pressure maintaining ball valve device are arranged in the outer pipe, a plurality of power wires and signal wires are arranged in the armored cable, the middle of the armored cable is wrapped by a high-pressure resistant corrosion-resistant sealing nylon layer, and a plurality of steel wire winding wraps the outside the armored cable; the two power lines sequentially penetrate through the cable connecting component, the slip ring component, the anti-torsion component, the high-pressure sealing cabin body and the internal channel of the counterweight component, one power line is connected to a motor in the driving circulation device for driving the lower drilling tool to rotate and the water pump below to circulate drilling fluid, and the other power line is always connected to the motor of the lifting mechanism downwards for driving the built-in lifting winch at the lower part to operate; the signal wire sequentially passes through the cable connecting component, the slip ring component and the internal channel of the anti-torsion component until being connected to the electronic component in the high-pressure sealing cabin.

2. The armored cable suspended pressure-maintaining ball valve flip-type pressure-maintaining coring marine drilling tool of claim 1, wherein: the cable connecting part is used for connecting the bottom of the armored cable, and can fixedly clamp the armored cable and simultaneously transmit the power line and the signal line from the inside of the cable connecting part to the lower part; the rolling bearing and the tapered roller bearing are arranged in the middle of the upper part and the lower part of the inner part of the slip ring assembly, so that when the drilling tool part at the lower part of the slip ring assembly rotates, the upper part cannot rotate along with the lower drilling tool, and therefore an armored cable is wound and damaged; the anti-torsion device is positioned at the lower end of the slip ring component, the periphery of the anti-torsion device is connected with a plurality of anti-torsion cutters through a connecting rod mechanism, the number of the anti-torsion cutters is more than or equal to 3, and the radial extension degree of the anti-torsion cutters can be adjusted through a lower lock nut and an anti-torsion spring, so that the anti-torsion device can be adjusted; the upper end and the lower end of the reverse twisting knife are arc-shaped, so that the reverse twisting knife is convenient to enter and lift out a drilled hole.

3. The armored cable suspended pressure-maintaining ball valve flip-type pressure-maintaining coring marine drilling tool of claim 1, wherein: the high-pressure sealed cabin is used for storing a control and detection system in the drilling tool, a plurality of electronic components including a temperature sensor, a pressure sensor, an azimuth sensor and a device for partially monitoring the state of the hole bottom are arranged in the high-pressure sealed cabin through a fixing mechanism, the high-pressure sealed cabin can not leak in a high-pressure liquid environment, drilling fluid is prevented from entering the high-pressure sealed cabin to damage a circuit board, and meanwhile, the pressure resistance requirement on the electronic components can be reduced; and signals of the electronic components are connected through the signal wires and are transmitted to a console of the drilling platform.

4. The armored cable suspended pressure-maintaining ball valve flip-type pressure-maintaining coring marine drilling tool of claim 1, wherein: the counterweight device can be internally added with different numbers of counterweights according to the needs, so that the maximum weight on bit during each tripping can be adjusted.

5. The armored cable suspended pressure-maintaining ball valve flip-type pressure-maintaining coring marine drilling tool of claim 1, wherein: the driving circulation device mainly comprises a motor, a driving speed reducer, a water pump and other mechanical structures for fixing the equipment, and is used as a connecting part to be connected with an upper drilling tool, a lower rock chip pipe, a built-in lifting mechanism, a pressure-maintaining rock core sampling pipe and a bottom coring bit; the motor and the driving speed reducer can be used as a power component for driving the lower coring drilling tool to rotate at the bottom of the hole, and the rotary power and torque can be transmitted to the lower part of the drilling tool; the water pump can collect the drilling fluid carrying the rock debris into the corresponding rock debris pipe through the circulating channel by pumping action.

6. The armored cable suspended pressure-maintaining ball valve flip-type pressure-maintaining coring marine drilling tool of claim 1, wherein: the pressure-maintaining ball valve device comprises a pressure-bearing spring limiting ring, an upper pressure-bearing spring, an upper pressure-maintaining ball valve seat, a pressure-maintaining ball valve, a lower pressure-maintaining ball valve seat, a lower pressure-bearing spring, a lower spring limiting pipe, a pressure-maintaining ball valve outer pipe and a pressure-maintaining ball valve shaft, wherein the outer wall of the pressure-maintaining ball valve outer pipe is provided with two slotted holes, so that the pressure-maintaining ball valve shaft can conveniently rotate and slide up and down; the pressure maintaining ball valve is abutted against the upper pressure maintaining ball valve seat and the lower pressure maintaining ball valve seat from top to bottom respectively, and meanwhile, the pressure maintaining ball valve is fixedly provided with a pressure maintaining ball valve shaft and corresponding arc slotted holes, so that the pressure maintaining ball valve can conveniently overturn along the arc slotted hole track of the pressure maintaining ball valve after being subjected to axial thrust, and the pressure maintaining ball valve is provided with a through hole, so that a pressure maintaining rock core sampling tube can conveniently pass through the pressure maintaining ball valve; when the pressure maintaining ball valve is subjected to pressure maintaining operation, the pressure maintaining ball valve can slide downwards and turn over for 90 degrees; the upper pressure-maintaining ball valve seat is propped against the lower end of the upper pressure-bearing spring, the lower pressure-maintaining ball valve seat is propped against the upper end of the lower pressure-bearing spring, and the upper pressure-maintaining ball valve seat and the lower pressure-maintaining ball valve seat can axially slide in the outer tube.

7. The armored cable suspended pressure-maintaining ball valve flip-type pressure-maintaining coring marine drilling tool of claim 6, wherein: the specific implementation process of realizing that the pressure maintaining ball valve slides downwards and overturns by 90 degrees by mutually matching the pressure maintaining ball valve with the pressure maintaining rock core sampling pipe is as follows: before coring and salvaging, the pressure maintaining core sampling pipe downwards passes through a hollow channel of the pressure maintaining ball valve, the edge of the pressure maintaining ball valve is tightly attached to the pressure maintaining core sampling pipe, the outer wall of the pressure maintaining core sampling pipe limits the downward overturning of the pressure maintaining ball valve, meanwhile, the pressure maintaining ball valve is contacted by the pressure maintaining core sampling pipe so that the pressure maintaining ball valve upwards abuts against an upper pressure maintaining ball valve seat, the upper pressure maintaining ball valve seat upwards abuts against an upper pressure bearing spring, the upper pressure bearing spring is limited by a pressure bearing spring limiting ring, and the spring is compressed so that the elastic potential energy is increased; when coring is completed and pressure maintaining is needed, the built-in lifting winch drives the pressure maintaining rock core sampling pipe to lift upwards through control, after the pressure maintaining rock core sampling pipe passes through the through hole of the pressure maintaining ball valve, the pressure maintaining rock core sampling pipe does not limit the pressure maintaining ball valve to overturn downwards any more, the spring with enough elastic potential energy has the spring thrust larger than the lower bearing spring thrust, the pressure maintaining ball valve moves downwards along the long round hole of the pressure maintaining ball valve pipe integrally under the thrust given by the spring at the moment, the pressure maintaining ball valve moves downwards in the process, the pressure maintaining ball valve overturning sliding groove is caused to slide and rotate around the pressure maintaining ball valve overturning driving pin fixed on the pressure maintaining ball valve pipe, meanwhile, the pressure maintaining ball valve overturning torque is given to the pressure maintaining rock valve overturning 90 degrees, and when the pressure maintaining reaches the descending limit position, the lower pressure bearing spring is compressed.

8. The armored cable suspended pressure-maintaining ball valve flip-type pressure-maintaining coring marine drilling tool of claim 6, wherein: the upper end of pressurize rock core sampling tube is equipped with the connection nipple joint, and the upper end of connection nipple joint is equipped with ball valve sealing member, ball valve sealing member includes ball disk seat and ball valve, and the ball valve is established in the ball disk seat, a plurality of claw springs of peripheral distribution of the lower port of pressurize rock core sampling tube.

9. The armored cable suspended pressure-maintaining ball valve flip-type pressure-maintaining coring marine drilling tool of claim 8, wherein: the lifting mechanism comprises a motor, a coupler C, a lifting mechanism reducer, a coupler D, a vertical worm, a transverse turbine, a built-in lifting winch and a displacement encoder, wherein the motor is arranged in the outer tube, the motor is connected with the lifting mechanism reducer through the coupler C, the lifting mechanism reducer is connected with the vertical worm through the coupler D, the vertical worm is meshed with the transverse turbine, the transverse turbine is arranged on a rotating shaft of the built-in lifting winch, the rotating shaft is sleeved on a built-in winch fixing shaft, the built-in winch fixing shaft is arranged on the tube wall of the outer tube, a steel cable on the built-in lifting winch is connected with a hanging ring at the top of a pressure maintaining ball valve sealing part, and the displacement encoder is arranged on one side of the built-in lifting winch and used for recording the displacement of the steel cable of the built-in lifting winch and transmits signals to a control console through a signal wire.

10. The armored cable suspended pressure-maintaining ball valve flip-type pressure-maintaining coring marine drilling tool of claim 9, wherein: the buffer mechanism is arranged in the outer tube and comprises a buffer spring, a buffer inner tube, an upper limiting ring and a lower limiting tube, wherein the buffer spring is sleeved on the periphery of the buffer inner tube, the lower end of the buffer spring is propped against a bulge at the lower end of the buffer inner tube, the upper end of the buffer spring is propped against the upper limiting ring, and the lower end of the bulge of the buffer inner tube is propped against the lower limiting tube; the lower end of the buffering inner tube is sleeved with a rubber pad for buffering the impact of the pressure-maintaining core sampling tube.

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