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208results about "Underwater drilling" patented technology

Integrated underwater rock drilling and splitting device

Integrated underwater rock drilling and splitting device, characterized in that it comprises: a supporting structure (1); a drilling unit (2) mounted on the support structure (1); a splitting unit (3) mounted on the support structure (1), wherein the splitting unit (3) and drilling unit (2) are arranged at intervals; and wherein the splitting unit (3) comprises a splitting rod (301) provided with a plurality of telescopic piston segments (302); a positioning and borehole alignment system comprising a positioning pin (401) and at least one auxiliary positioning device, wherein the positioning pin (401) is designed to bear against and be fixed to a rock body (7) and the auxiliary positioning device is arranged relatively fixedly on the support structure (1); a workstation switching mechanism (5), wherein the support structure (1) is arranged on the drive side at a switching end of the workstation switching mechanism (5); wherein the workstation switching mechanism (5) is configured as a rotary switching mechanism or a translation switching mechanism; wherein the rotary switching mechanism is configured to drive the support structure (1) to rotate so that the splitting unit (3) is able to move and be aligned with the drilling position of the drilling unit (2); and wherein the translation switching mechanism is configured to drive the support structure (1) to translate so that the splitting unit (3) is able to move and be aligned with the drilling position of the drilling unit (2); and a connecting rod (6), wherein the connecting rod (6) is adapted to be connected to a ship-based manipulator arm in order to adjust the underwater depth of the device.
Owner:CHINA THREE GORGES CORPORATION

Static sounding device and method based on seabed drilling machine

The invention belongs to the technical field of marine geological exploration, and provides a static sounding device and method based on a seabed drilling machine. The device is detachably connected into a drill pipe of a seabed drilling machine, and specifically comprises a hoisting unit, a driving unit, a penetration unit and a static sounding probe which are sequentially connected from top to bottom, the driving unit comprises a lead screw driving shaft, an inner rotating frameless motor and a shell which are sequentially arranged from inside to outside. During sounding, the rotor of the inward-rotating frameless motor rotates to drive the penetration sleeve and the static sounding probe to penetrate into the stratum so as to obtain related data. The internal rotation frameless motor is adopted, so that the number of parts is greatly reduced, and the complexity is reduced; and the size of the whole structure in the vertical direction is greatly reduced, and the penetration stroke of the static sounding probe can be increased within the effective stroke of the drill pipe.
Owner:HAINAN RES INST OF ZHEJIANG UNIV

Mobile offshore carbon capture and sequestration systems and methods using jack-up structure

Systems and methods for mobile offshore carbon capture and sequestration operations. One system includes a first installation featuring a direct air carbon dioxide capture (DAC) system, carbon dioxide dehydration, carbon dioxide compression and a second installation featuring carbon dioxide injection facilities to inject carbon dioxide into an underground reservoir or other suitable subsurface formation.
Owner:VTEC CONSULTING LLC

Underwater rock drilling and splitting integrated equipment and working method thereof

The invention discloses underwater rock drilling and splitting integrated equipment and a working method thereof, and relates to the field of underwater rock breaking. The equipment comprises a bearing structure, a drilling unit, a splitting unit, a positioning and hole aligning system and a connecting rod; the drilling unit carries out drilling operation, the position of the drilling unit and the position of the splitting unit are rapidly switched on the same equipment through the station switching mechanism, the splitting unit can be aligned to the drilling position of the drilling unit, and the positioning and hole aligning system guarantees that a splitting rod is accurately inserted into a drilled hole. Through a non-blasting drilling and splitting mode, vibration / noise pollution is reduced, the environmental protection requirement is met, through a mode of switching the drilling unit and the splitting unit, continuous connection and splitting after drilling operation are promoted, the operation efficiency can be improved, and the time cost and the labor cost of frequent replacement of equipment are reduced; compact integrated design is adopted, the equipment size is reduced, the connecting rod is matched with the shipborne mechanical arm, depth adjustment is achieved, and the device is suitable for the narrow environment.
Owner:CHINA THREE GORGES CORPORATION

Small hole heat conduction and gas migration channel construction system and method based on seabed horizontal directional drilling

The invention discloses a small hole heat conduction and gas migration channel construction system and method based on seabed horizontal directional drilling, and relates to the technical field of ocean engineering and energy exploitation. A sea surface operation module is used for controlling all modules of the system to work cooperatively and supplying energy to the system; the seabed drilling guide module is used for realizing layer-entering drilling and channel pre-construction; the signal detection module is used for monitoring the spatial position and attitude parameters of the seabed drilling guide module in a seabed bottom layer in real time; the small hole perforation flow guide module is used for constructing a heat conduction and gas migration channel network after the drill bit enters a target hydrate layer; after the heat conduction and gas migration channel network is formed, the seabed drilling guide module continues to drill out of the seabed bottom layer, and a channel formed by the seabed drilling guide module is used for dragging a pipeline into a reservoir. A reusable mining channel suitable for the deep sea environment is constructed, the gasification efficiency is effectively improved, and stratum disturbance and energy consumption are reduced.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Deepwater drilling method for inhibiting bottom stratum erosion of multi-wellhead suction pile and suction pile

PendingCN120119895AUnderwater drillingSealing/packingSuction forceDeepwater drilling
The invention provides a deepwater drilling method for inhibiting bottom stratum erosion of a multi-wellhead suction pile and the suction pile. The drilling method comprises the steps that guide pipes and pre-inclined casing pipes are prefabricated and installed at a plurality of wellheads at the top of a pile cylinder to form the suction pile, the pre-inclined casing pipes and the guide pipes at the same wellhead are sequentially arranged in a sleeving mode from inside to outside, and the pre-inclined casing pipes and the guide pipes are arranged at the same wellhead in a sleeving mode from inside to outside; the shaft sleeve is coaxial with the wellhead; the suction pile is conveyed to a water entry position opposite to the drilling position; the suction pile is put down and penetrates into the set position of the stratum; a first well hole with the preset depth is drilled downwards in each pre-inclined casing pipe, and a first casing pipe is placed downwards in each first well hole; cement is injected into the first casing pipe for well cementation, so that the preset pressure intensity is achieved, and stratum erosion is restrained; and a second well hole with the preset depth is drilled downwards in the first casing pipe, a second casing pipe is placed downwards in the second well hole, well drilling is completed, erosion of the bottom stratum of the pile barrel can be restrained, and stage well drilling operation can be completed safely and efficiently.
Owner:中海油海南能源有限公司

Marine fine pressure control well drilling intelligent control system based on AI technology

The invention belongs to the field of marine drilling, relates to a data analysis technology, and aims to solve the problem that control parameters cannot be reasonably set when set numerical analysis results of the same control parameter are inconsistent in the prior art, in particular to an intelligent control system for marine fine pressure control drilling based on an AI technology. Comprising a parameter control module, a compensation control module, a protection adjustment module and a protection optimization module which are connected in sequence. The parameter control module is used for performing parameter control analysis on the seabed drilling equipment; a plurality of control groups are generated, deviation coefficients of the control groups are calculated, and set optimization values are marked through the deviation coefficients; the set optimization value is sent to a compensation control module; according to the method, the problem of control instruction conflict caused by multi-source monitoring parameters is effectively solved, meanwhile, the wellbore blockage risk caused by control lag is avoided, and the safety and control precision of deep sea drilling operation are improved.
Owner:SHANDONG YUYUE ELECTRICAL AUTOMATION CO LTD

Water drilling operation platform

The invention belongs to the technical field of overwater drilling, and provides an overwater drilling operation platform which comprises a platform frame, a drilling station, a propulsion system station, a plurality of hydraulic cylinders, a plurality of hydraulic cylinders, a plurality of hydraulic cylinders, a plurality of hydraulic cylinders and a plurality of hydraulic cylinders. The platform frame is sequentially provided with a plurality of containing spaces in the same direction. The wood plate is laid on the top of the platform frame; the buoy is arranged in the containing space and fixedly connected with the platform frame, an annular space and a counterweight space are arranged in the buoy, and the annular space surrounds the exterior of the counterweight space; the buoyancy adjusting assembly is arranged in the annular space; the counterweight device is arranged in the counterweight space; the drilling machine is arranged at the drilling station; and the propelling system is arranged at the propelling system station. Through organic combination of the platform frame, the buoy, the buoyancy adjusting assembly, the counterweight device, the drilling machine, the propelling system and other parts, the functions of stable floating, flexible movement, accurate drilling, safe operation and the like of the platform are achieved.
Owner:CHINA WATER RESOURCES BEIFANG INVESTIGATION DESIGN & RES CO LTD

Oil exploitation underground injection-production device with anti-blocking function

The invention discloses an oil exploitation underground injection-production device with an anti-blocking function, and relates to the technical field of offshore drilling and oil extraction, the oil exploitation underground injection-production device comprises a drill rod and a drill bit, and further comprises a fixing cylinder rotationally connected to the top of the drill bit and installed at the bottom of the drill rod, and a plurality of water holes are formed in the drill bit in a penetrating mode; the driving mechanism is mounted in the fixed cylinder and is used for driving the drill bit to rotate; the linkage eye cleaning mechanism comprises a turntable mounted on the driving mechanism and a plurality of ejector rods mounted on the turntable; the sub-control mechanism comprises an adjusting seat mounted in the fixed cylinder and an elastic reset assembly mounted outside the ejector rod; according to the technical scheme, all the ejector rods are driven to sequentially clean blockages in all the water holes, the smoothness of the water holes is guaranteed, the problem that the water holes are blocked by rock debris generated by well drilling is solved, all the ejector rods are driven to sequentially clean the blockages in all the water holes, and the problem that the throughput of drilling fluid is affected when the water holes are cleaned at the same time is solved.
Owner:DONGYING KAIDI TECH SERVICE CO LTD

Movable deep-sea large-depth core sampling drilling machine

The invention discloses a movable deep-sea large-depth rock core sampling drilling machine, and relates to the technical field of rock core sampling, the movable deep-sea large-depth rock core sampling drilling machine comprises a main machine and a drilling unit assembled at the front end of the main machine, and the drilling unit is used for executing drilling operation; the multiple drill rod drilling tools are arranged on the main machine in a stacked mode, and a conveying unit used for conveying the drill rod drilling tools to the front end is arranged on the main machine; the drill rod processing arm is arranged on the drilling unit in a sliding manner; comprising an output motor. According to the movable deep-sea large-depth core sampling drilling machine, the drilling machine stretching arm is driven to stretch and contract in the horizontal direction so as to drive the drilling unit to incline forwards or swing backwards along the rotating shaft, so that the drilling unit is deflected to a proper angle and is nearly perpendicular to the drilling ground, and it is guaranteed that drilling force is stable; and the bearing-feeding action is completed through the arrangement of the drill rod processing arm, so that the replacement of the drill rod and the drill tool is simpler.
Owner:HANGZHOU HANLU SUBSEA TECHNOLOGY CO LTD

Waste cartridge for an underwater drilling assembly

Underwater drilling assemblies and systems are disclosed. The underwater drilling assemblies and systems include drill assemblies, frames for drill assemblies, and connection flange assemblies to be fastened to a ship skin. The underwater drilling assemblies and systems further include waste cartridges and automatic air-bleed valve assemblies.
Owner:RESOLVE MARINE GROUP INC

Single pile auxiliary piling device and method for offshore wind power platform

The invention belongs to the technical field of offshore wind power construction, and discloses an offshore wind power platform single pile auxiliary piling device and method.The device comprises a plurality of rock breaking units distributed at the lower end of a single pile at intervals in the circumferential direction, and each rock breaking unit comprises a connecting piece, a power unit and a drill rod; the upper end of the connecting piece is fixed to the lower end of the single pile, and a power mounting cavity is formed in the connecting piece; the power unit is arranged in the power mounting cavity; the upper end of the drill rod is connected with the power unit, and the lower end of the drill rod penetrates out of the lower end of the connecting piece and is provided with a drill bit. The method solves the problems that according to a traditional method that a hydraulic impact hammer is directly used for pile sinking, bearing force eccentricity is likely to happen at the critical point of the hammer encountering a hard stratum, the puncture slippage phenomenon is generated, and certain potential safety hazards are caused to installation of equipment such as a generator set in the later period.
Owner:OCEAN UNIV OF CHINA

Hydraulic rock drill for underwater construction

The invention relates to the technical field of rock drilling, in particular to a hydraulic rock drilling machine for underwater construction, and solves the problems that in the existing underwater rock drilling construction process, silt particles easily permeate into the rock drilling machine along with reciprocating motion of a crushing drill rod, sealing failure and hydraulic oil leakage are caused, sealing stability cannot be guaranteed through single gas injection isolation, and the rock drilling efficiency is high. The rock drilling machine comprises a rock drilling mechanism, the rock drilling mechanism comprises a ventilation driving assembly, and an air injection isolation rock drilling assembly is installed below the ventilation driving assembly; the ventilation driving assembly comprises a ventilation hood, a plurality of one-way ventilation units are installed on the outer side of the bottom end of the ventilation hood, and each one-way ventilation unit comprises a conical air guide sleeve. The rock drill is subjected to multi-channel gas injection isolation, permeation of silt particles can be effectively avoided, sealing stability is kept, and efficient and stable rock drilling operation is achieved through hydraulic and electric synchronous driving.
Owner:CCCC GUANGZHOU DREDGING CO LTD +1

Radial well cluster mining system and method for deep sea natural gas hydrate and shallow gas

The invention discloses a radial well cluster mining system and method for deep sea natural gas hydrate and shallow gas. The small and medium-sized workboat is sequentially connected and fixed with the seabed drilling machine and the multi-well guide suction anchor, and the small and medium-sized workboat controls the seabed drilling machine through an umbilical cable to complete drilling and arrangement of a vertical well and an inclined well of drilling and fixing integrated hydrate in the multi-well guide suction anchor; the vertical well and the inclined well are connected with a multi-pipe Christmas tree arranged on the multi-well guide suction anchor, and then the multi-pipe Christmas tree is connected with a mining and transportation pipeline through a seabed supercharging electric submersible pump to form a natural gas hydrate one-machine multi-well type radial well cluster efficient mining and transportation path. According to the hydrate anchor base radial well cluster mining system, the mining range is greatly enlarged, the mining efficiency is improved, integrated drilling and one-machine multi-well arrangement are achieved through the seabed drilling machine, the operation cost is remarkably reduced, the drilling and mining efficiency is improved, and the integrated operation process of drilling, well cementation, well completion and mining of the deep sea hydrate reservoir is achieved.
Owner:ZHEJIANG UNIV

Deepwater drilling system and deepwater drilling method

PendingCN121539206AUnderwater drillingFlushingDeepwater drillingWell drilling
The invention belongs to the technical field of deepwater drilling, and discloses a deepwater drilling system and a deepwater drilling method. The deepwater drilling system comprises a drilling ship, a waterproof unit, a regulation and control device, a blowout prevention device and a drilling device. The upper end of the waterproof unit is connected with a drilling ship and provided with a first penetrating channel. The regulation and control device is arranged at the lower end of the waterproof unit and provided with a plurality of connecting channels. The connecting channel has an open state and a closed state, and in the open state, the first penetrating channel communicates with the outside through the connecting channel. And the blowout preventer is arranged at the wellhead and is connected with the waterproof unit. And the first penetrating channel can be communicated with a second penetrating channel of the blowout preventer. The drilling device is arranged on the drilling ship and penetrates through the first penetrating channel, the second penetrating channel and the well mouth. The well drilling device is provided with a conveying channel, and drilling fluid can be conveyed to the lower end of the well drilling device through the conveying channel. When the system is used for drilling operation, the pressure borne by a stratum at a wellhead can be effectively reduced, and stratum fracturing is avoided.
Owner:GUANGZHOU MARINE GEOLOGICAL SURVEY

Marine natural gas hydrate in-situ drilling and production robot

The invention discloses a marine natural gas hydrate in-situ drilling and production robot which comprises a drilling group base body, the drilling group base body is of a cylindrical structure, the drilling group base body is sequentially connected with a large motor box and a data acquisition instrument box, the data acquisition instrument box is connected with a front small motor box, and a large motor is arranged in the large motor box and connected with a planetary gear assembly; the front small motor box is connected with a central shaft, the central shaft is sequentially sleeved with a front movement mechanism and a rear movement mechanism, the end part of the central shaft is connected with a rear small motor box, the front small motor box controls the front movement mechanism, the rear small motor box controls the rear movement mechanism, and the rear small motor box is connected with a post-processing container; a center pipe is arranged on the planetary gear assembly, a flow channel is arranged in the center of the center pipe, flow channel teeth are arranged on the periphery of the end of the center pipe, and a plurality of roller bits are arranged on the outer edge of the drill group base body towards the well bottom face. The problem that in the existing marine natural gas hydrate exploitation process, the integrity and stability of a shaft are damaged is solved.
Owner:CHINA NAT PETROLEUM CORP +1

Multi-head drilling machine driven by submersible drilling machine

The utility model discloses a multi-head drilling machine driven by a submersible drilling machine, which comprises a lifting cross beam, a submersible drilling machine module, a multi-head drilling linkage box and a drill bit module, the lifting cross beam is fixedly connected with the submersible drilling machine module, the submersible drilling machine module is connected with the input end of the multi-head drilling linkage box, and the output end of the multi-head drilling linkage box is connected with the drill bit module. The transmission pipe module is arranged between the inner wall of the box body shell and the gear module and used for perfecting the working environment of the multi-head drilling machine during construction or pouring a concrete wall, the drill bit module comprises a plurality of drill bits, and the number of the drill bits is the same as that of the linkage gears; the submersible drilling machine module is driven by the lifting drill rod to drive all the linkage gears to rotate, and each linkage gear drives the corresponding drill bit to conduct downward drilling construction. The device disclosed by the utility model is low in total manufacturing cost, beneficial to field maintenance and repair, low in construction cost and good in market prospect.
Owner:郑文忠 +3

Lightweight subsea intervention equipment pressure control head and grease injection hydraulic control system therefor

A lightweight subsea intervention equipment pressure control head and a grease injection hydraulic control system therefor, belonging to the technical field of offshore oil engineering. The pressure control head comprises a grease injection assembly (1), a grease discharge assembly (2) and a grease sealing assembly (3); the grease injection assembly is provided with a sealing grease injection port (13); the grease injection assembly injects sealing grease via the sealing grease injection port; a first-direction end of the grease injection assembly is connected to the grease discharge assembly; the grease discharge assembly is provided with a sealing grease discharge port (26); a second-direction end of the grease injection assembly is connected to the grease sealing assembly; thus, the sealing grease injected via the sealing grease injection port can be discharged via the sealing grease discharge port for recovery, and the sealing grease can also be discharged to the grease sealing assembly for sealing. The pressure control head achieves dynamic sealing of fluids or gases by means of injection of lubricating grease.
Owner:SHENZHEN OFFSHORE OIL ENG UNDERWATER TECH CO LTD +1

Lockable flange for underwater drilling assembly

This invention discloses an underwater drilling assembly and system. The underwater drilling assembly and system includes a drilling assembly, a frame for the drilling assembly, and a connecting flange assembly to be secured to a hull. The underwater drilling assembly and system also includes a waste bin and an automatic vent valve assembly.
Owner:SOLVE MARITIME GRP CO LTD

Power head device of overwater ultra-deep mixing pile machine

The utility model discloses an overwater ultra-deep mixing pile machine power head device which comprises a slurry supply system, an inner pipe is arranged at the pipeline connecting end of the slurry supply system, a drill rod and a drill bit are arranged on the lower portion of the inner pipe, and the inner pipe is fixedly connected with the drill rod and the drill bit through flanges. An outer pipe is arranged outside the inner pipe, a driven gear is arranged on the surface of the outer pipe, a gear box is arranged on the side face of the outer pipe, a power system is arranged on the upper portion of the gear box, and a transmission shaft of the power system extends into the gear box and is provided with a driving gear. Connection between the drill rod and the power head gear box is changed from rigidity to flexibility, the power head gear box, the drill rod and a drill bit are protected, impact of sea waves and surges on construction machinery in actual production is truly avoided, the equipment failure rate is reduced, offshore operation is difficult, efficiency is low, the construction period is long, input cost is low, and the device is suitable for popularization and application. The device is very convenient to mount and dismount, and has wide adaptability and good economic and social values.
Owner:SHANGHAI DITAI BASIC ENG CO LTD

Mobile offshore carbon capture and sequestration systems and methods using jack-up structure

System 200 comprises first offshore installation 60 comprising a jack-up structure comprising floatable hull 62 and three or more legs 64, configured to be raised and lowered vertically and engaged with or landed on seafloor 90. The jack-up structure has a carbon dioxide, CO2, removal system comprising CO2 removal unit(s) 3 (including fans and CO2 adsorption and / or absorption units), CO2 dehydration unit(s) 5, and CO2 compressor(s) 7. The CO2 removal unit is configured to remove CO2 from atmospheric air through Direct Air Capture (DAC) and form captured CO2. The system also comprises transfer conduit(s) 92 fluidly connecting the CO2 compressor(s) with a second offshore installation 70. The CO2 compressor is configured to transfer the captured CO2 through the conduits to the second installation. Second offshore installation 70 comprises CO2 injection well 94 configured to route the captured CO2 into a subsurface storage formation 110.
Owner:VTEC CONSULTING LLC

Latchable flange for an underwater drilling assembly

PendingEP4619302A1ConstructionsDrilling rods
Underwater drilling assemblies and systems are disclosed. The underwater drilling assemblies and systems include drill assemblies, frames for drill assemblies, and connection flange assemblies to be fastened to a ship skin. The underwater drilling assemblies and systems further include waste cartridges and automatic air-bleed valve assemblies.
Owner:RESOLVE MARINE GROUP INC

Exhaust assembly for underwater drilling assembly

The invention discloses an underwater drilling assembly and system. Underwater drilling assemblies and systems include a drilling assembly, a frame for the drilling assembly, and a connecting flange assembly to be secured to a hull. The subsea drilling assembly and system also includes a waste box and an automatic vent valve assembly.
Owner:SOLVE MARITIME GRP CO LTD

A pressurized rotary hydraulic control system with multiple operating modes

The application provides a pressurized rotary hydraulic control system with multiple working modes, comprising a load-sensitive pump, a pilot oil pump, a multi-way valve assembly, a hydraulic cylinder, a hydraulic motor, a proportional pressure reducing valve, an electromagnetic reversing valve, a hydraulic control reversing valve and a manual overflow valve, etc. The application has three working modes of pressurized feeding, single-pump driving rotary rock breaking and double-pump driving rotary rock breaking; wherein the pressurized feeding working mode is the extension and retraction work of the hydraulic cylinder driven by the hydraulic pump, having the advantages of fast feeding and pressurized propulsion of the drilling tool for active rock breaking; the single-pump driving rotary rock breaking working mode is the forward and reverse rotation work of the double motor driven by the single hydraulic pump, having the advantages of stepless speed regulation and multiple torque output; the double-pump driving rotary rock breaking working mode is the forward and reverse rotation work of the double motor driven by the double hydraulic pump, having the advantages of high power output and fast cutting of the rock layer. The application can meet the needs of high and low speed rotary rock breaking of the drilling tool, pressurized drilling in super deep ground and load-sensitive regulation and control in the well forming process.
Owner:WENLING RES INST OF FLUID MASCH JIANGSU UNIV +1

A control system for underwater rock drilling equipment

The present application provides a control system for underwater rock drilling equipment, which relates to the field of underwater rock drilling technology. In this system, a host computer and a slave computer are communicatively connected; the host computer is used to receive real-time sensor data uploaded by the slave computer, and transmit the working parameter adjustment instructions corresponding to the real-time sensor data to the slave computer; the slave computer is used to adjust the working parameters of the rock drilling equipment according to the working parameter adjustment instructions and, after detecting an abnormality in the host computer, to perform state control on the rock drilling equipment or automatically switch to manual control after the rock drilling operation at the current rock drilling position is completed. The embodiment of the present application can achieve the adjustment of the working parameters of the rock drilling equipment through the cooperation of the host computer and the slave computer, realize the automatic control of the rock drilling equipment, reduce the involvement of manual control, reduce the workload and labor intensity of the operator, improve the safety factor and rock drilling efficiency, and the slave computer can take over the rock drilling equipment when the host computer is abnormal, realize the normal operation of the rock drilling equipment, and ensure the reliability of the rock drilling equipment.
Owner:JIANGMEN HANGTONG SHIPBUILDING OF CCCC FOURTH HARBOR ENG CO LTD

Novel drilling equipment for underwater geology

The utility model discloses novel drilling equipment for underwater geology. The novel drilling equipment comprises a sleeve, a drill rod and a drill bit assembly. An opening is formed in the lower end of the sleeve and is communicated with the accommodating space; the drill rod is arranged in the containing space, the drill bit assembly comprises a drill bit body, at least two movable parts and reset parts arranged corresponding to the movable parts, the drill bit body is connected to the lower end of the drill rod and extends to the lower end of the sleeve through the opening, and the movable parts have a drilling state and a recycling state; the upper end of the abutting face is located in the axial extending space position of the containing space, the lower end of the abutting face is located outside the axial extending space position of the containing space, and in the recovery state, the upper end and the lower end of the abutting face are both located in the axial extending space position of the containing space. According to the technical scheme, the drill bit can be conveniently taken out of the drill hole.
Owner:CHANGJIANG SURVEY PLANNING DESIGN & RES CO LTD

Underwater static rock breaking device and method

The application belongs to the technical field of static rock breaking, and discloses an underwater static rock breaking device and method, which are used for breaking rock. The rock is provided with a containing hole, and the underwater static rock breaking device is arranged in the containing hole. The underwater static rock breaking device comprises a fixed pipe assembly, a first flexible pipe, a water injection pipe and a freezing pipe line. The first flexible pipe is connected with one end of the fixed pipe assembly and surrounds the fixed pipe assembly to form a freezing cavity. The water injection pipe can extend into the freezing cavity and inject liquid water into the freezing cavity. When the liquid water is injected into the freezing cavity through the water injection pipe, the first flexible pipe can expand and tightly adhere to the hole wall of the containing hole, and the fixed pipe assembly can be clamped with the hole wall to lock the first flexible pipe. The freezing pipe line can extend into the freezing cavity and freeze the liquid water in the freezing cavity. When the liquid water in the freezing cavity is frozen into solid water, the volume of the solid water is increased, which can make the first flexible pipe further expand and press the hole wall until the rock is broken, and no vibration, explosion or toxic substance is generated, which is safe and environmentally friendly.
Owner:NAT ENG RES CENT OF DREDGING TECH & EQUIP

Drilling and fixing integrated drilling device and method for deep sea natural gas hydrate exploitation system

The invention discloses a drilling and fixing integrated drilling device and method for a deep sea natural gas hydrate exploitation system. The drilling device comprises a hollow drill rod, a plurality of continuous pipe separation units and a hollow drill bit which are fixedly connected from top to bottom in the axial direction, and according to the method, the multi-well guiding suction anchor, the rope soil taking equipment, the drilling device and the seabed drilling machine are lowered to a seabed to be positioned and leveled through a small and medium-sized workboat and are fixedly connected with the multi-well guiding suction anchor; the seabed drilling machine controls the drilling device to drill along the multi-well guide suction anchor, and the rope soil taking equipment takes soil; and the pipe is replaced until the target depth is drilled, the drilling device conducts self well cementation and well completion through the self-expansion packer and the pre-filled gravel screen pipe, and the drilling device is completed after equipment is recycled. The device has continuous and integrated operation capacity of well drilling, soil taking, well cementation and well completion, the cost is effectively reduced, the efficiency is remarkably improved, rapid construction, convenient well cementation and economic well completion of a deep sea hydrate mining system are achieved, and a new thought and method are provided for safe and efficient mining of deep sea hydrates.
Owner:ZHEJIANG UNIV

Method for providing a subsea template system with a tail pipe and a subsea template system

A method for providing a subsea template system with a tail pipe, and a subsea template system are disclosed. The subsea template system comprising a structure including a guide with an opening, and including a plurality of supports for engaging a seabed; a tail pipe being cylindrical and comprising a serrated end structure at a first (lower) end of the tail pipe, the tail pipe arranged at the opening, and the tail pipe comprising an interface for rotating and axially move the tail pipe relative to the structure. The method comprising: placing the structure and the tail pipe on the seabed; rotating and moving axially the tail pipe relative to the guide and into the seabed; drilling with the drill string an opening for an outer conductor casing; and installing the outer conductor casing and applying cement between the outer conductor casing and the tail pipe.
Owner:FMC KONGSBERG SUBSEA AS

Nearshore subsea drilling

A subsea vertical drilling machine is disclosed, having a drill assembly formed by a riser pipe having a first end, a second end, and a length extending between the first and second ends; and a drilling machine body, including a drilling head, coupled to the first end of the riser pipe, and a vertical feed system configured for advancing the drill assembly in a vertical direction. The riser pipe is provided with at least one rack extending along at least a part of the length of the riser pipe, and the vertical feed system comprises a motor coupled to a pinion, the pinion arranged for engaging with the rack for advancing the drill assembly. Unlocking insights from Geo-Data, the present invention further relates to improvements in sustainability and environmental developments: together we create a safe and liveable world.
Owner:FNV IP BV