5511results about "Drilling rods" patented technology

The derrick type continuous oil pipe integrated sidetrack drilling operation device is provided with a base, a derrick, an injection head installation support, an injection head, a lifting oil cylinder, a hydraulic clamp and a remote operation room, one side of the derrick is fully opened, the derrick and the base are both of a lightweight rigid structure, and the injection head is installed at the top of the derrick for remote control. After the base is arranged at a wellhead and is unfolded and installed, one side of the base is connected with the lifting oil cylinder, the other side of the base is in butt joint with the ramp and the pipe rack, the derrick is rapidly erected through the lifting oil cylinder, and after the injection head is hoisted to the top of the derrick, the injection head is rapidly installed and subjected to alignment adjustment through the injection head installation support and the adjusting structure. Meanwhile, the tool rod and the elevator are arranged at the injection head, the tool rod is pulled and placed through the injection head, an oil pipe column and a sucker rod can be independently lifted or lowered, the oil pipe column and the sucker rod are pushed into a ramp from one side of an opening of a derrick, integrated sidetrack drilling operation of the coiled tubing is achieved, and sidetrack drilling efficiency and operation safety of the coiled tubing are remarkably improved.

The invention relates to geotechnical engineering pile foundation equipment, in particular to intelligent cast-in-place pipe pile equipment integrated with a multi-source sensor and a construction method. A spiral sleeve; a double-layer sleeve wall protection system; an outer sleeve anti-rotation pressing system; and a pile core soil anti-rising telescopic system and the like. The intelligent PCC pile construction equipment integrates torque, rotating speed, drilling speed, drilling pressure and other multi-source sensors and an artificial intelligence algorithm to achieve intelligent sensing and control over a pile machine, efficient combined soil spinning of a spiral sleeve and a double-layer sleeve wall protection system is achieved through a hollow rotating power equipment system, an annular cavity is rapidly formed, a reinforcement cage is put down, concrete is poured to form a PCC pile, and the construction efficiency of the PCC pile is improved. Finally, the inner sleeve and the outer sleeve of the double-layer sleeve wall protection system are pulled out in a vibrating mode at the same time under the action of the winch up-pulling system, and the inner sleeve and the outer sleeve are in butt joint and reset with the annular rotary excavating soil taking system, the problems that a traditional PCC pile is limited in application in complex stratums and a reinforcement cage cannot be put down are solved, and the construction intelligence is achieved.

The invention discloses a weldless integral high-strength feeding drill rod and a preparation method thereof. The drill rod comprises a female connector, an elevator groove, a thick-wall slip clamping section, a drill rod pipe body and a male connector which are integrally formed and have the same inner diameter. The drill rod is manufactured by integrally machining a solid bar or a thick-wall pipe body. The yield strength of the drill rod pipe body, the yield strength of the thick-wall slip clamping section and the yield strength of the elevator groove are 135 ksi-180 ksi, and the yield strength of the male connector and the yield strength of the female connector are 130 ksi-150 ksi; the outer diameter of the thick-wall slip clamping section is larger than that of the drill rod pipe body; the outer diameter of the elevator groove is smaller than that of the clamping section of the thick-wall slip; the outer diameter of the elevator groove is not smaller than that of the drill rod pipe body. The outer diameter of the connector does not need to be obviously increased, meanwhile, enough elevator lifting capacity is guaranteed, and the problem of poor structure performance caused by friction welding seams and welding area heat treatment is avoided. Complicated welding, postweld heat treatment and other procedures are omitted, the possibility that a weld joint serves as a performance weak link is avoided, higher comprehensive tensile mechanical performance is achieved, and the method is suitable for well drilling application of extra-deep wells, ocean deep wells and the like.

A completion system for CO2 storage monitoring includes a first well tubular metal structure, a second well tubular metal structure, cement arranged between the borehole and a second part of the second well tubular metal structure, a monitoring line extending along the second well tubular metal structure and into the cement, a production packer assembly providing a seal between the first and second well tubular metal structures, the production packer assembly having an anchoring unit, and an annular barrier unit. Each unit comprises a tubular metal part configured to be mounted as part of a first part of the second well tubular metal structure, the tubular metal part having an expandable metal sleeve having a circumferential groove with an anchoring element and a sealing element. The monitoring line extends through the anchoring and annular barrier units between the tubular metal part and the expandable metal sleeve.

An anchor rod mounting trolley belongs to the technical field of tunnel construction and comprises a movable chassis, a grouting system and an operation system. The operating system comprises a working arm, a hanging basket device and a propelling device; the grouting system and the working arm are both installed on the movable chassis, the hanging basket device is installed on the working arm, and the propelling device is installed on the hanging basket device. The grouting system is used for injecting grout into an anchor rod hole; the working arm is used for adjusting the positions of the hanging basket device and the propelling device relative to the anchor rod hole; and the propelling device is used for inserting the anchor rod body into the grouted anchor rod hole. The mechanical degree can be improved, the labor intensity is reduced, the operation efficiency is improved, and the construction cost is reduced.

The invention relates to the technical field of mine underground equipment, in particular to crawler-type high-gas coal seam drilling equipment based on a double-channel drill rod, which comprises a walking chassis, the double-channel drill rod, a hydraulic slotting system and a negative pressure deslagging device. Crawler-type composite drilling equipment is provided, process integration is carried out through breakthrough of three core technologies, directional drilling (a diamond drill bit and a spiral groove drill rod), hydraulic slotting and negative pressure deslagging are integrated into single equipment, the working procedure switching time is shortened, synchronous slotting and deslagging operation is achieved through a double-channel drill rod, and the working efficiency is improved. The problems of energy consumption and blockage are solved; and meanwhile, gas accidents are prevented.

The invention discloses a rigid casing stabilizer and relates to the technical field of oil field low-carbon exploitation. An annular counter bore is upwards formed in the lower end face of the centralizing sleeve, a lifting sleeve is arranged in the annular counter bore and connected with the annular counter bore through threads, the upper portion of the lifting sleeve is connected with a compression spring A through a plane bearing, the upper portion of the compression spring A abuts against the bottom of the annular counter bore, and a balance cutting mechanism is arranged on the lower portion of the lifting sleeve. The drilling tool has the beneficial effects that the balance cutting mechanism is arranged on the lower portion of the centralizing sleeve, when the well diameter is irregular during casing running and the main cutting block and the auxiliary cutting block encounter the inner protrusion of the well wall, the lifting sleeve starts to rotate and ascend, the main cutting block and the auxiliary cutting block cut the well wall, the casing can be smoothly put into a shaft, and the drilling tool is convenient to use. And during cutting, large bending force cannot be formed on the casing pipe, so that the casing pipe is protected.

The invention belongs to the technical field of petroleum and natural gas exploration and development, and particularly relates to a coiled tubing bottom seal dragging pressure testing and leakage finding packer and a using method thereof, and the pressure testing and leakage finding packer comprises an upper centralizer, a pressure balancing mechanism, a setting packing mechanism and a lower centralizer which are coaxially and sequentially connected in a threaded mode. The pressure balance mechanism comprises a sleeve shell assembly and a pressure relief assembly. A pressure relief opening is formed in the side face of the sleeve shell assembly, and the pressure relief assembly is arranged in the sleeve shell assembly. The setting packing mechanism comprises a central pipe; a rubber sleeve assembly, a slip assembly and a centralizing assembly are sequentially installed on the basis of the center pipe from top to bottom, the rubber sleeve assembly is movably connected with the center pipe in an axial limiting mode, the slip assembly is fixedly connected with the centralizing assembly, and the centralizing assembly is movably connected with the center pipe based on the track pipe groove. According to the technical scheme, pressure bearing reasons and leakage point positions which cannot be found out by dragging pressure testing for multiple times in one-time well entering can be achieved, and it is guaranteed that follow-up fracturing construction operation of the shale gas well is safely and efficiently carried out.

The invention discloses a novel telescopic pipe structure of a high-temperature and high-pressure well and an optimal configuration method of a pipe column of the novel telescopic pipe structure, belongs to the technical field of oil and gas exploitation, and aims to solve the problem of buckling failure of the pipe column caused by piston force load of an existing telescopic pipe under high-temperature and high-pressure working conditions. The novel telescopic pipe is composed of an inner cylinder mechanism, an outer cylinder mechanism and a balance chamber mechanism. The inner cylinder mechanism and the outer cylinder mechanism are connected through threads, and structural integrity and reliable connection are guaranteed. The balance chamber mechanism comprises inner and outer pressure cavities and a hydraulic hole which are respectively communicated with the inner and outer pressure of the oil pipe to dynamically balance the piston force. The optimized configuration of the pipe column comprises the following three steps: S1, analyzing the mechanical behavior of the telescopic pipe column to provide a mechanical basis for configuration optimization; s2, the position of the telescopic pipe is designed, the well depth range where the telescopic pipe works is determined, and the optimal position is locked through iterative calculation; and S3, designing the number of the telescopic pipes, and determining the optimal number of the telescopic pipes meeting the compensation requirement. The stability of the high-temperature and high-pressure well pipe column can be remarkably improved, and technical support is provided for safe and efficient development of ultra-deep oil and gas wells.

The invention discloses a concentric tube geothermal well structure capable of improving heat exchange efficiency. The concentric tube geothermal well structure comprises a first well opening section and a second well opening section. The first well opening section comprises a first casing pipe, and first well cementation cement is arranged between the inner wall of the first well opening section and the first casing pipe; the second well opening section is provided with a second casing pipe, second well cementation cement and a central casing pipe; a distance is arranged between the second casing pipe and the well wall of the second well opening section, second well cementation cement is arranged between the center casing pipe and the second casing pipe, a water stopping device is arranged at the upper end of the second well cementation cement and is of a reducing structure with the diameter sequentially increased from top to bottom, and the inner wall of the top end of the water stopping device is connected with the center casing pipe. The bottom end of the water stop device is connected with the second sleeve; a packing structure is arranged at the bottom end of the second well cementation cement, and a permeable section is arranged at the lower end of the packing structure. The invention further provides a construction method of the geothermal well structure. The structure is reliable, the heat exchange efficiency is improved, and the industrial long-term operation requirement is met.

The invention belongs to the technical field of geotechnical engineering drilling, and particularly relates to an instant pipe-following anti-falling object device for broken stratum drilling, which comprises a drilling machine power head and a drilling rod, a drill bit is arranged at one end of the drilling rod, an inner wall protection sleeve is arranged outside the drilling rod, and the inner wall protection sleeve is connected with the drilling machine power head through a linkage assembly. An outer wall protection sleeve is arranged outside the inner wall protection sleeve, the outer wall protection sleeve and the inner wall protection sleeve are connected through an elastic assembly, a sliding fit clearance cavity is formed between the outer wall protection sleeve and the inner wall protection sleeve, and a sliding guide assembly and a permanent magnet assembly are arranged in the sliding fit clearance cavity; a sensing assembly and a propelling assembly are arranged on the drill rod; according to the device, by integrating the linkage assembly, the elastic assembly, the permanent magnet assembly and the central controller, instant synchronous movement of the wall protection sleeve and the drill bit is achieved, hole wall collapsing objects are effectively blocked, drill burying and drill jamming accidents are completely eradicated, and the construction efficiency is improved.

The invention discloses an in-situ coring system and method for a soft rock extension roadway bottom plate. The system comprises a stable anchoring base, a drilling driving and propelling module, a stress adjusting module, a low-disturbance coring module, a rock core in-situ packaging and fidelity module and an intelligent integrated control unit. The stable anchoring base is used for fixing the system on a roadway bottom plate; the drilling driving and propelling module provides rotating power and axial feeding force for the drilling tool; the stress adjusting module is used for adjusting the stress state around the rock core; the low-disturbance coring module comprises a composite function coring drill bit and a double-layer coring pipe, and low-disturbance cutting and containing of a rock core are achieved. The rock core in-situ packaging and fidelity module is used for sealing and packaging the rock core in real time; and the intelligent integrated control unit adaptively controls the coring process according to sensor data. According to the invention, low-disturbance, high-precision and in-situ fidelity rock core acquisition of the soft rock roadway bottom plate can be realized, and the problems of large soft rock coring disturbance, difficulty in fidelity, low intelligent degree and the like are effectively solved.

The invention discloses a combined sucker rod centralizer, and relates to the technical field of sucker rod centralizers, the combined sucker rod centralizer comprises an upper fixing sleeve and a centralizing assembly, the upper fixing sleeve is connected to the outer side of a sucker rod body in a penetrating and sleeving manner, the lower side of the upper fixing sleeve is connected with an upper adjusting mechanism capable of moving up and down, and the upper adjusting mechanism is connected with the upper side of the centralizing assembly. According to the combined sucker rod centralizer, the rotation effect of the centralizing assembly is automatically achieved through the inertia force of up-down movement of a sucker rod and rolling fit of the slope blocks and the balls, so that the contact points of the steel balls and the inner wall of an oil pipe are continuously and dynamically changed, and the situation that local concentrated abrasion is caused due to the fact that the contact points of a traditional centralizer are fixed is avoided; and through high-low position automatic matching of the first inclined plane block and the second inclined plane block, bidirectional stable supporting of the upper guide rod, the lower guide rod and the centralizing assembly can be achieved, the situation that the centralizing assembly is unstable due to inertia offset is avoided, and the operation stability of the device is guaranteed.

The invention provides an impact rotary drilling hydraulic control system of a dinting machine, which belongs to the technical field of hydraulic control systems and comprises a variable pump, a pilot oil source control valve group, a proportional multi-way valve, a shuttle valve I, a one-way pressure reducing valve, a shuttle valve II, a drilling machine pilot handle group, an impact rotary drilling machine, a bidirectional hydraulic lock and a drilling machine feeding oil cylinder. According to the hydraulic control system for percussive rotary drilling of the dinting machine, the percussive rotary drilling machine can perform stepless speed regulation between two speeds, high-frequency percussive or low-frequency percussive operation can be flexibly used according to rock stratum and geological working conditions, the application range of equipment is greatly widened, and the hydraulic control system can be used for rock stratums with high hardness, weathered rock stratums and hard and brittle geology. And during low-frequency impact operation, one-key linkage operation can be realized, namely, the functions of feeding, rotating and impacting of the drilling machine can be completed by operating the impact pilot handle.

The invention relates to the technical field of gravel geologic protection, and provides a gravel geologic body pore-forming wall-protecting construction device and a pore-forming method, which are used for supporting a pore wall by applying a wall-protecting structure to the pore wall in the punching process to avoid the problem that gravel on the pore wall falls off or causes pore collapse. According to the technical scheme, a supporting plate is rotationally connected to a drill rod, a supporting pipe is fixed to the side, opposite to a drill bit, of the supporting plate, the drill rod is sleeved with the supporting pipe, and the drill rod can rotate relative to the supporting pipe; the air bag sleeves the supporting tube and is located at the position, close to the supporting plate, of the supporting tube; the cylindrical net racks are connected end to end in the axial direction through the connecting pieces, the connecting pieces are provided with easy-to-fold marks, the cylindrical net racks are arranged on the supporting pipes in a sleeving mode, the cylindrical net rack located at the head can move and can be arranged on the air bag in a sleeving mode, and when the air bag is inflated, the cylindrical net racks can be opened and can be easily broken and separated from the fold marks; the hole wall is supported.

Provided in one example is a coupling member, a downhole tool, and a well system. The coupling member, in one aspect, includes an axial tension member portion, and a first shear member portion, the first shear member portion having a first shear member shoulder extending from a first end of the axial tension member portion, the first shear member shoulder configured to engage with an opposing head member shoulder to axially fix the axial tension member portion relative to the head member. The coupling member, according to one aspect, includes a second shear member portion, the second shear member portion have a second shear member shoulder extending from a second opposing end of the axial tension member portion, the second shear member shoulder configured to engage with an opposing base member shoulder to axially fix the axial tension member portion relative to the base member.

The invention discloses a slope soil layer drilling device, and relates to the field of soil layer drilling, the slope soil layer drilling device comprises a drilling guide sleeve for a drill rod to rotatably and movably pass through, and the outer wall of the drilling guide sleeve is connected with a limiting mechanism for limiting and supporting the drilling guide sleeve in a drill hole; a fine adjustment deviation rectifying mechanism is movably arranged below the limiting mechanism; the limiting mechanism is used for being supported in a drill hole, and the fine adjustment deviation rectifying mechanism is used for conducting fine adjustment deviation rectifying and reducing the risk of hole inclining and the like. When the drilling device is used, a certain supporting effect can be achieved on the side wall of a drilled hole, disturbance of a drill bit on the periphery of the soil body of the drilled hole in the drilling process is reduced, the risk of hole collapse is reduced, deviation correction adjustment is conducted in the drilling process, unqualified holes such as inclined holes are avoided, and the construction quality is guaranteed; and the drilling device is convenient to mount and dismount, and can further guarantee the construction period and quality and save the construction cost in the construction of soil bodies with uneven geology such as slopes.

A method for performing simultaneous operations at a wellsite comprising two or more adjacent wellheads, each respectively connected to a well, may include the following steps: providing a fluid supply via upstream equipment to an intermediate supply point; fluidly connecting the intermediate supply point to a single wellhead, the fluidly connecting comprising connecting a first end of a flexible pipe to the intermediate supply point and a second end of the flexible pipe to a first wellhead; performing a wellbore operation on a first well using the fluid supply from the upstream equipment supplied to the first wellhead; disconnecting the second end of the flexible pipe from the first wellhead; and connecting the second end of the flexible pipe to a second wellhead.

A combined rig and rigless deployed completion system includes a rig deployed dual flow mandrel arranged in a mandrel section of a pipeline. The dual flow mandrel includes a cylindrical mandrel body with a wall defining an interior volume, and a mandrel partition arranged in the interior volume. The mandrel body has a set of radial ports defined in the wall. The mandrel partition includes a barrel and at least two flanges. The barrel is concentrically arranged in the interior volume of the mandrel body and defines a central channel extending from the first end to the second end of the mandrel body. The flanges protrude radially from the barrel and extend longitudinally along an outer face of the barrel to contact the interior surface of the mandrel body. The barrel and the mandrel body define an annular space and the flanges partition the annular space into annular channels.

The application provides a downhole hydraulic back-off tool, characterized in that the back-off tool comprises a hydraulic anchor, a hydraulic back-off device and a telescopic compensation mechanism, and the power part is composed of a driving cylinder, a driving pin, an anti-rotation cylinder, a rotating cylinder, a third spring, a central shaft, an inner ratchet mechanism, a driving shaft and an outer ratchet mechanism; the one-way left-rotation part of the hydraulic back-off device comprises the inner ratchet mechanism and a second spring, and the anti-rebound right-rotation part comprises the outer ratchet mechanism and a first spring. The application makes all the torques of the workover operation be transmitted to the fishing tool through the relative movement of the inner ratchet mechanism and the outer ratchet mechanism from the hydraulic back-off device, and the working string does not need to transmit the torque to the downhole through the surface wellhead rotary table or the top drive, the hydraulic anchor is anchored and unanchored through the pressure in the string, and the anchor provides a fulcrum function for the timely cooperation of the power torque output of the hydraulic back-off device; the telescopic compensation mechanism is used for compensating the axial displacement of the back-off tool.

A coiled tubing unit (CTU) for performing subterranean wellbore operations can include a base and a first tubing reel positioned on a first portion of the base, where the first tubing reel includes a first spool and a first coiled tubing, and where the first spool is configured to rotate in order to move the first coiled tubing within a wellbore within a subterranean formation. The CTU can also include a second tubing reel positioned on a second portion of the base, where the second tubing reel includes a second spool and a second coiled tubing, and where the second spool is configured to rotate in order to move the second coiled tubing within the subterranean formation. The first tubing reel and the second tubing reel may be configured to be operated simultaneously and independently of each other.

The invention provides a deepwater semi-submersible drilling platform pressure control drilling MPD control system which comprises a platform rotary table face. A platform wellhead flow divider, a marine riser expansion joint, a marine riser tension ring, a marine riser rotation control pup joint, an MPD hydraulic control pup joint, an MPD marine riser annulus sealing device, a marine riser four-way joint, a drilling marine riser, an underwater blowout preventer set and a seabed underwater wellhead are sequentially connected to the platform rotary table face from top to bottom. The MPD hydraulic control pup joint is connected with a rotary control pup joint power unit through an umbilical cable I, an umbilical cable roller frame I and a cable hose, and the rotary control pup joint power unit is connected with a deepwater MPD electro-hydraulic control system main control station; the MPD marine riser annulus sealing device is connected with the annulus sealing device and the buffer manifold hydraulic power unit through an umbilical cable II, an umbilical cable roller frame II and a cable hose and is connected with the deepwater MPD electro-hydraulic control system master control station; the throttling hydraulic power unit is connected with the deepwater MPD electro-hydraulic control system master control station. According to the system, pressure regulation and control, equipment management and operation safety guarantee in the deepwater pressure-controlled drilling well are realized.

A connection device includes an inverted polished bore housing for receiving a casing stub in a wellbore and a sealing assembly for connected the connection device to the casing stub. The inverted polished bore housing extends from an open first end of the connection device and includes a connection surface and a smooth inner surface. The connection surface is defines a first opening at the open first end of the connection device. The sealing assembly is arranged a second open end of the connection device, The sealing assembly has an expandable material connected to the inverted polished bore housing. The expandable material is configured to expand in the presence of an activation fluid.

The present invention provides a female connector for a subsea connector assembly, including at least one latching mechanism operably mounted within an opening through a tubular wall along a wall axis aligned downwardly and converging toward a central axis. The latching mechanism includes a latch member coupled to a distal end of the link member to form a latching coupling configured to allow relative movement in at least one first degree of freedom (DOF) between the latch member and the link member, an actuator configured to move the coupled latch and link member from a first position to a second position, and a biasing member configured to bias the latch member toward and engage the first position when moving between the first and second positions. The latch member is configured to release from the biasing member in the first position and move unbiased from the first position to a third position into the central passage.

The invention belongs to the technical field of oil and gas drilling equipment, and discloses a mechanical arm for lifting a pipe, which comprises a mechanical arm and a horizontal catwalk, the mechanical arm comprises a lifting mechanism, the lifting mechanism is arranged on the horizontal catwalk, the lifting mechanism is provided with a swing mechanism, the swing mechanism is provided with a luffing mechanism, the luffing mechanism is provided with a telescopic mechanism, and the telescopic mechanism is arranged on the horizontal catwalk. A righting mechanism is arranged in the middle of the telescopic mechanism, clamping mechanisms are arranged at the two ends of the telescopic mechanism, all the clamping mechanisms are used for clamping the upper position and the lower position of a pipe, and the righting mechanism is used for righting the pipe. Synchronous operation of the horizontal catwalk, the mechanical arm and the power head can be achieved, automatic telescopic buckling or releasing of the wellhead coupling can be achieved, and the operation efficiency is improved.

The present application is suitable for pile foundation positioning technical field, provide a kind of pile foundation positioning device, including base, the mounting bracket is fixed on the base, the base is provided with avoiding hole, further include: guide sliding block, main shaft, helical blade, mounting plate, guide shaft, mounting block, drive assembly, reciprocating mechanism, second transmission assembly and disengaging mechanism.Reciprocating mechanism is driven mounting block to reciprocate up and down on guide shaft by the way of guide sliding block moves in guide chute, further make main shaft and helical blade reciprocate up and down while moving down, it is convenient to discharge the soil drilled by helical blade, improve the efficiency of pit positioning, when main shaft is contacted with rock, disengaging mechanism removes the transmission connection of main shaft and first motor and stops mounting block to reciprocate up and down on guide shaft, make mounting block move upwards along guide shaft, main shaft has no downward thrust at this time, to avoid the instant collision of helical blade and rock when main shaft is contacted with rock.

The invention discloses a self-drilling anti-floating anchor drilling tool structure with a self-adaptive positioner and a construction method, solves the problem that in the prior art, the forming quality is affected by structural arrangement in the drilling process of an anti-floating anchor, and has the beneficial effects that wall protection and muck removal are achieved, grouting can be achieved, and centering positioning is kept in the grouting process. According to the specific scheme, the self-drilling anti-floating anchor rod drilling tool structure with the self-adaptive positioner comprises a pile casing, one end of the pile casing can be connected with a drilling machine, a front-end drill crown is detachably arranged at the other end of the pile casing, open holes are formed in the side wall of the pile casing, spiral blades are annularly arranged on the pile casing, and a plurality of anchor rod steel bars are arranged in the pile casing; one end of each anchor rod steel bar abuts against the front-end drill crown, the other end of each anchor rod steel bar is arranged to exceed the pile casing, the self-adaptive positioners are arranged in the length direction of the anchor rod steel bars at set intervals, the self-adaptive positioners are located in the pile casing, the self-adaptive positioners are arranged on the peripheral sides of the anchor rod steel bars, and the self-adaptive positioners are fixedly connected with the anchor rod steel bars.

The utility model discloses a petroleum manifold connecting structure and a manifold set. The petroleum manifold connecting structure comprises a left connector, a right connector, a clamping groove, a petroleum pipe, a fixing hole, a hexagon nut, a fixing protruding block, a fixing groove, a small-caliber sealing ring, a large-caliber sealing ring, a lantern ring and a nut. A left joint and a right joint are arranged on the outer wall and the inner wall of the petroleum pipe, and the petroleum pipe is embedded into clamping grooves of the left joint and the right joint to be fixed; the edge of the right side face of the left connector and the edge of the left section of the right connector are provided with a plurality of fixing protruding blocks and L-shaped fixing grooves respectively, the fixing protruding blocks are embedded into the fixing grooves to be locked, the left connector is embedded into the right connector to achieve firm connection, and then the left connector and the right connector are connected through hexagon nuts to be reinforced. According to the connecting mechanism, flowing of petroleum is not affected, the connecting mechanism is not prone to being damaged and destroyed, all connection is detachable, and disassembly and replacement are convenient.

The invention relates to the technical field of coal mine drilling, and provides an open type hydraulic clamping device which comprises a main body structure with stepped holes formed in the two sides, piston rods are slidably connected into the stepped holes, slips are detachably connected to the small ends of the piston rods, and sealing cavities are formed in the two sides of the large ends of the piston rods. The side, away from the slip, of the sealing cavity is communicated with an oil inlet pipe of a hydraulic system, the other side of the sealing cavity is communicated with a guide-in pipe, the tail end of the guide-in pipe is communicated with an oil return pipe and an overflow pipe of the hydraulic system through a three-way valve, the overflow pipe is communicated with an overflow hole in the side portion of the main body structure, and the large end of the piston rod can block or open the overflow hole. And hydraulic locks are arranged on the oil inlet pipe and the ingress pipe. When power is cut off suddenly, the hydraulic locks on the oil inlet pipe and the guide-in pipe can be locked rapidly, so that the pressure maintaining effect on the two sealing cavities can be achieved, the two slips can maintain the clamping force of a drilling tool, the drilling tool is prevented from sliding off, and the safety of underground equipment or personnel is guaranteed.

The invention provides a coal mine crawler-type full-hydraulic underground drill rig, and belongs to the technical field of drilling mechanical equipment, the coal mine crawler-type full-hydraulic underground drill rig comprises a crawler chassis, the upper end of the crawler chassis is provided with a driving mechanism, an angle adjusting mechanism and a height adjusting mechanism, the height adjusting mechanism is provided with a mounting table, and the upper end of the mounting table is provided with a drilling mechanism; the driving mechanism comprises a lifting plate, a rotating shaft is rotatably mounted in the lower end of the lifting plate, and a rotating gear is arranged on the circumferential surface of the rotating shaft; by means of the arranged driving mechanism, a single servo motor serves as core power, power is distributed to an angle executing mechanism, a height executing mechanism and a drilling executing mechanism according to needs through a liftable rotating gear and a precise toothed plate transmission system, a redundant structure formed by stacking a plurality of drives is abandoned, the whole drilling machine driving system is highly integrated in layout, and the drilling efficiency is improved. The size is greatly reduced, the device perfectly adapts to a narrow tunnel space, and meanwhile the manufacturing cost is reduced.