297 results about "Upper joint" patented technology

The invention discloses a high-temperature-resistant and high-pressure-resistant autonomous deep well pressure maintaining sampler, and belongs to the technical field of drilling engineering sampling. The sampler comprises an upper joint, a control outer pipe, an end cover, a valve body and a liquid storage chamber which are connected in sequence, an electromagnet is arranged on the outer side of the end cover; an electric control module is arranged in the control outer pipe; a valve element with a permanent magnet is arranged in the valve body in a sliding mode, the valve element is driven to move axially through non-contact electromagnetic force between the electromagnet and the permanent magnet, and opening and closing of the sampling flow channel are achieved. The bottom of the valve core is provided with a valve core inner channel communicated with the sampling flow channel and the liquid storage chamber and a one-way valve; a sampling inlet channel is formed in the joint of the end cover and the valve body. According to the invention, a pure mechanical sealing-based structure is adopted, so that the sealing reliability and the operation stability in a high-temperature and high-pressure environment of a deep well are remarkably improved, drilling fluid is not needed, and efficient and pressure-maintaining sampling of in-situ formation fluid is realized.

The utility model relates to the field of hydraulic tensile shearing test fixture, disclose a V type notch hydraulic tensile shearing fixture, including upper clamping concrete, sample and lower clamping concrete, the upper clamping concrete and lower clamping concrete upside down both ends are fixed with the handle at the edge, the upper clamping concrete and lower clamping concrete opposite side fixedly set up with the jack, the lower clamping concrete front end fixedly set up with the centring block, the upper clamping concrete front end fixedly set up with the upper joint, the lower clamping concrete rear end fixedly set up with the lower joint, the upper joint and lower joint outside all are threadedly equipped with lock nuts. In the utility model, through optimization design and stable clamping system, the fixture significantly reduces the skidding phenomenon in the test, ensures the accuracy of test result, effectively improves the consistency of test result, simultaneously, the simple operation design of fixture not only shortens the preparation time, but also improves the test efficiency, reduces the working strength of operating personnel.

The utility model relates to a tower crane holding tile connecting structure, and belongs to the technical field of tower cranes. Comprising a standard knot lower joint, a standard knot upper joint, a holding tile I and a holding tile II, a hinge I is arranged on the standard knot lower joint, a hinge II is arranged on the holding tile I, a hinge III is arranged on the holding tile II, and the hinge II and the hinge III are connected with the hinge I through connecting rods. The holding tile I and the holding tile II are fixedly connected with the standard knot lower connector and the standard knot upper connector through bolts. The standard knot lower joint and the standard knot upper joint are provided with grooves matched with the holding tile I and the holding tile II, and the holding tile I and the holding tile II can be clamped into the standard knot lower joint and the standard knot upper joint through the grooves. The utility model has the beneficial effects that the traditional tower body standard knot mounting method is eliminated, the holding tile is initially mounted to the outer side of the lower joint, frequent mounting and dismounting are not needed, and the mounting efficiency is improved. And the hinge design is adopted, so that the holding tiles can be rotationally opened and closed, the flexibility is higher, and the application range is wider.

The application discloses a mechanical drill bit rotary steering vertical drilling tool and relates to the technical field of geological drilling. The mechanical drill bit rotary steering vertical drilling tool comprises an upper joint, an outer cylinder, a steering drill bit body, a flow distribution component and a pendulum control system. The pendulum control system comprises a pendulum mounting component, a pendulum ball hinge, a pendulum middle cylinder and a pendulum end head. The pendulum ball hinge, the pendulum middle cylinder and the pendulum end head can rotate relative to the pendulum mounting component. A plurality of drill bit nozzles are uniformly and sequentially arranged on the steering drill bit body in a circumferential direction. Each drill bit nozzle penetrates through upper and lower ends of the steering drill bit body. A plurality of edge flow distribution holes, which penetrate through upper and lower ends of the flow distribution component, are uniformly and sequentially arranged on an outer edge of the flow distribution component in a circumferential direction. A plurality of central inclined holes, which penetrate through upper and lower ends of the flow distribution component, are uniformly and sequentially arranged on an upper end of a middle part of the flow distribution component in a circumferential direction. A central flow passage, which penetrates through upper and lower ends of the pendulum end head, is arranged on a middle part of the pendulum end head. The mechanical drill bit rotary steering vertical drilling tool is not prone to failure in a complex and changeable downhole environment, has high reliability and low cost.

The utility model discloses a subsurface safety valve piston dynamic sealing detection device, comprising an upper joint, a lower joint, a piston motion assembly, a piston dynamic sealing assembly and a guide assembly, the piston motion assembly is arranged on the upper joint, and the piston dynamic sealing assembly is sleeved on the piston motion assembly and forms dynamic sealing with the upper joint. The device is simple in structure and easy and convenient to operate, the actual working environment of the subsurface safety valve can be truly simulated, accurate detection of the dynamic sealing performance of the piston dynamic sealing assembly is achieved, and the detection accuracy of the subsurface safety valve is improved. And reliable experimental data support can be provided for sealing material type selection, structure optimization and service life prediction, the operation reliability of the subsurface safety valve is remarkably improved, and the field sudden failure rate and the unplanned production halt risk are reduced.

The utility model relates to the technical field of oil extraction, in particular to an efficient temporary plugging anti-overflow device. Comprising an upper connector, the upper connector is fixedly and hermetically connected with a valve connector, the lower end of the valve connector is fixedly and hermetically connected with a filter pipe and an outer cylinder, the filter pipe is located on the inner side of the outer cylinder, the valve connector is provided with an air hole communicated with an annular cavity between the outer cylinder and the filter pipe, and a check valve is installed in the air hole; the lower end of the filter pipe is fixedly and hermetically connected with a lower pipe located inside the outer cylinder, the lower end of the lower pipe is blocked and fixedly connected with the lower end of the outer cylinder through a lower connector, and a temporary blocking plate is detachably, fixedly and hermetically connected into the lower connector. Through soluble temporary plugging, multi-stage filtering, gas-liquid separation and modular sealing design, the device has the core advantages of efficient overflow prevention, rapid production, airlock prevention, low maintenance cost and the like, has both environmental protection property and economical efficiency, and is suitable for oil well operation under complex working conditions.

The invention relates to the technical field of assembly type houses, in particular to a rapidly-assembled folding type house. According to the technical scheme, the device comprises ground feet arranged at the bottom of a base plate, a threaded rod is arranged between the base plate and the ground feet, the threaded rod is in threaded connection with two symmetrically-arranged threaded blocks, a lower connecting block is fixedly installed at the tops of the ground feet, and an upper connecting block is fixedly installed at the bottom of the base plate; four linkage rods are hinged among the two threaded blocks, the lower connecting block and the upper connecting block, and the four linkage rods form a rhombic structure. The chassis, the main frame, the fixed wallboards and the door and window wallboards can be in butt joint with an original house by disassembling the side wallboards on one side, expansion is achieved, the scale and layout of a dormitory area are flexibly adjusted according to requirements, the use requirements of different scenes are met, meanwhile, the chassis, the main frame, the fixed wallboards and the door and window wallboards are provided with folding rubber layers, and the folding rubber layers are not prone to deformation. And folding can be performed along the folding rubber layer, thereby reducing space and facilitating transportation.

The invention relates to the technical field of fishing barrels, in particular to a self-rotating circulating unfreezing and shearing fishing barrel capable of detecting fish top, which comprises an upper joint, a detection outer barrel, a slip outer barrel and a shifting fork which are sequentially in threaded connection from left to right, and a fish top detection mechanism is arranged in the detection outer barrel; the fish top detection mechanism can move left and right and can block a cavity of the upper connector, a positive circulation channel is arranged on the outer side of the fish top detection mechanism, a clamping slip and a clamping slip seat are installed in the slip outer cylinder, the right end of the clamping slip is of a split structure and can be tightened inwards, sawteeth are arranged on the inner side of the clamping slip, and the right end of the clamping slip is located in the clamping slip seat. And a guide shoe is arranged outside the shifting fork. The device is reasonable and compact in structure and convenient to use, the fish top detection mechanism moves left and right to block the cavity of the upper connector, ground pumping pressure is observed to confirm whether a fish enters an effective part in the fishing socket or not, a pipe column is lifted for fishing after the fish enters the effective part, and the fishing success rate of the coiled tubing fishing socket is increased.

The utility model belongs to the field of valves in wells, and particularly relates to a reverse circulation valve. In order to prolong the service life of the reverse circulation valve and save cost, the utility model provides the reverse circulation valve. The reverse circulation valve comprises a spring, a piston, an upper connector, an outer cylinder and a lower connector, a pressure transmitting hole is formed in the outer cylinder, and the piston comprises a pressure bearing face used for bearing pressure. The piston is located in the outer cylinder, the upper connector or the outer cylinder comprises a spring installation face, the spring is installed between the spring installation face and the piston, the lower connector or the outer cylinder comprises a limiting part, the limiting part is used for limiting the limiting position of downward movement of the piston, and a radial through hole used for being aligned with the pressure transmitting hole during inverse well flushing is formed in the piston; and the inner diameter of the pressurizing seat is smaller than the inner diameters of the upper joint, the lower joint and the outer cylinder. The pressurizing seat is additionally arranged on the piston, and when the spring cannot reset the piston, external force is applied to the pressurizing seat to drive the piston to reset, so that the service life of the reverse circulation valve is prolonged, and the cost is saved.

The utility model provides an upper connector pneumatic clamp, and belongs to the technical field of pneumatic clamps. The problems that in the prior art, sealing reliability is poor, an air path is single, and multiple air cylinders or complex clamping actions cannot be expanded are solved. The pneumatic clamping device comprises an installation base, a pneumatic clamping unit and an air path interface module, a plurality of installation holes are formed in the installation base, the pneumatic clamping unit comprises an air cylinder barrel, a piston rod, a piston assembly, a piston end cover and a base supporting block, and an upper connector and a lower connector are formed at the upper end and the lower end of the piston end cover respectively. The upper connector and the lower connector are communicated with each other, the upper connector is sleeved with the piston assembly, the piston rod penetrates through the upper connector and the lower connector, the piston assembly is covered with the air cylinder barrel, the driving connector is installed at the upper end of the base supporting block, the piston rod is connected with the driving connector, and the air path interface module is fixedly installed on the side face of the installation base. The multi-station synchronous clamping device has the advantages of multi-station synchronous clamping and good sealing effect.

The present application relates to the technical fields of deepwater drilling and workover technology of offshore oil engineering, and particularly relates to a joint for emergency release of a deepwater light drilling and workover underwater riser and an operating method thereof. The emergency release joint comprises an upper joint body and a lower joint body which are mutually butted. A locking assembly composed of a clamp and a support ring is arranged on the periphery of the butt joint, and an electromagnetic drive assembly is correspondingly arranged. Upper and lower blowout preventer modules are arranged on both sides of the butt joint along the fluid passage in axial opposition. The electromagnetic drive assembly is used to drive the support ring to move between two working positions, so as to control the locking or releasing of the clamp on the butt joint. In operation, the upper and lower blowout preventer modules are first controlled to be closed, and then the mechanical locking is released to realize the release of the joint. After reconnection, the mechanical locking is restored and the fluid passage is opened. The scheme is suitable for emergency release and subsequent reconnection of the deepwater riser under abnormal working conditions.

The invention relates to the technical field of oil extraction testing, in particular to a separate injection well packer sealing examination pressure relief device and a working method.The separate injection well packer sealing examination pressure relief device comprises an upper connector, a pressure relief section and a lower connector, the outer wall of the upper connector is sleeved with a sealing ring A, the upper end of the upper connector is provided with internal threads, and the pressure relief section is of a hollow cylinder structure; a through hole is formed in the outer wall, a sealing ring B is arranged between the outer wall and the upper connector, the lower end of the pressure relief section is of a conical structure and embedded into the lower connector, the lower connector is of a hollow cylindrical structure, a through hole is formed in the outer wall, and sealing rings C are arranged on the two sides of the through hole formed in the outer wall of the pressure relief section respectively. The sealing examination pressure relief device for the separated layer water injection well packer is simple in structure and convenient to assemble and disassemble, pressure relief can be achieved only by lifting an instrument, the pressure relief section and the upper connector are in interference fit through the sealing ring B to prevent threads from loosening or reversing, the stability and safety of the device are ensured, the sealing ring is of a replaceable structure, and the sealing ring is convenient to replace. The maintenance cost is reduced; and the service life of the device is prolonged.

The utility model discloses a jar for dismounting a sealing plug, which solves the problems of complex structure and poor adaptability of the existing jar, and adopts the technical scheme that the jar comprises an upper joint, a lower joint and a central rod, the two ends of the central rod are respectively connected with the upper joint and the lower joint, and a jar ring is movably sleeved on the central rod, and the upper joint or the lower joint is movably sleeved on the central rod. The device is extremely simple in structure, flexible, small and exquisite, and capable of effectively providing jarring force and quickly disassembling the sealing plug.

The invention provides a constant-torque shock absorber, which belongs to the technical field of well drilling, and comprises an outer barrel with an inner cavity, and an upper joint, an upper sleeve, a spline housing, a middle barrel, a connecting body, a lower sleeve, a lower connecting body and a lower joint which are connected in sequence; the inner core shaft is provided with a central flow channel, is arranged in the outer cylinder body, and comprises an upper core shaft, a middle core shaft, a core shaft connecting body, a lower core shaft and an extension core shaft which are connected in sequence; the damping assembly comprises a line contact rolling assembly installed on the upper mandrel, a small disc spring installed on the middle mandrel and a large disc spring installed on the lower mandrel. Harmful torsional vibration can be restrained in the drilling operation, so that the purposes of protecting a drill column, improving the drilling speed and reducing the cost are achieved.

The invention relates to the technical field of well cementation, in particular to an integral type air-tight seal grading cementing device and method.The integral type air-tight seal grading cementing device comprises an upper connector, a center pipe, an outer cylinder, an outer seal cylinder, an upper plug seat, a lower plug seat and a baffle ring, the outer cylinder is fixedly installed on the outer side of the lower end of the upper connector, and the center pipe is fixedly installed on the inner side of the middle of the outer cylinder through a first shear pin; an outer sealing cylinder is fixedly mounted outside the lower part of the outer cylinder; the method comprises the following steps that (1) a well cementation operation pipe string is connected to be located above a first-stage well cementation tool and located below a second-stage well cementation tool; the device is reasonable and compact in structure and ingenious in conception, by arranging the upper sealing piece and the lower sealing piece, a grading hooping hole closing mode is changed into an inclined face pressing sealing mode, and the sealing pieces are prevented from being damaged by shearing force; the supporting disc spring and the retaining lock ring are arranged to apply continuous acting force to the upper sealing piece and the lower sealing piece, so that the tool can guarantee good sealing performance under long-term high-temperature and high-pressure conditions, and the tool has the advantages of being stable, reliable and good in sealing effect.

A barrel for a woodwind instrument comprising a threaded bore to promote airflow throughout a woodwind instrument, thus, reducing turbulence, limiting the reflection of sound waves, and producing a sound with reduced amplitudes of overtones. The reduction in turbulent flow, further limits backpressure within the instrument, enabling the user to reduce the effort required to perform actions such as tonguing on said instrument. The barrel for a woodwind instrument comprises a mouthpiece receiver and an upper joint receiver for attachment to a woodwind instrument.

The invention discloses a double-layer sleeve section milling tool, relates to the technical field of sleeve forging and milling, and solves the technical problems that an existing device is low in forging and milling efficiency, cannot perform double-layer sleeve forging and milling, and is relatively short in service life. The forging and milling device comprises an upper body, a middle connector, a lower body and forging and milling assemblies, the two ends of the middle connector are connected with the upper body and the lower body correspondingly, the ends, away from the middle connector, of the upper body and the lower body are connected with the upper connector and the lower connector correspondingly, and the forging and milling assemblies are arranged in the upper body and / or the lower body; the piston rod is sleeved with a piston, the forging and milling assembly comprises a cutter body, a first guide block and a push block, the push block is detachably connected with the piston, the cutter body is provided with a multi-stage cutter head, the two ends of the cutter body are slidably connected with the first guide block and the push block respectively, the push block is pushed through the piston rod, the push block pushes the cutter body to move, and the forging and milling device has the advantages of being high in forging and milling efficiency, good in effect and the like.

The application relates to the technical field of water conservancy projects, and discloses a large-section prefabricated and assembled box culvert structure suitable for cold and arid areas and a construction method, a top plate unit comprises a plurality of sequentially connected first prefabricated components, the first prefabricated components are in overall H-shaped structures, and the two sides of the first prefabricated components are provided with first joints at bottom ends; a bottom plate unit comprises a plurality of sequentially connected third prefabricated components, the two sides of the third prefabricated components are provided with third joints; a side wall unit comprises a plurality of sequentially connected second prefabricated components, the second prefabricated components are in overall L-shaped structures; one side end of the second prefabricated component is provided with a second upper joint matched with the first joint, and the other side end is provided with a second lower joint matched with the third joint. The box culvert is split into a plurality of H-shaped first prefabricated components, a plurality of L-shaped second prefabricated components and a plurality of third prefabricated components, the size and weight of a single prefabricated component are reduced, and the engineering implementation difficulties of the large-section box culvert in the prefabrication, transportation and on-site hoisting processes are solved.

The recoverable anchoring packer for windowing of the multilateral well comprises a mandrel, the two ends of the mandrel are in threaded connection with an upper connector and a lower connector, and the portion, between the upper connector and the lower connector, of the mandrel is sequentially sleeved with an upper sliding groove, a lower sliding groove, a rubber sleeve supporting base, a sleeve and a shearing ring; an anchoring slip is arranged between the upper sliding groove and the lower sliding groove, and a guide rail sliding way of the anchoring slip is matched with guide rail sliding ways of the upper sliding groove and the lower sliding groove. A rubber sleeve assembly is arranged at the upper end of the rubber sleeve supporting seat; a fixing sleeve is arranged in the sleeve and seals an annular space between the sleeve and the mandrel; a release ring is arranged below the fixing sleeve in the sleeve, the release ring is connected with the sleeve through an unblocking pin, a lock ring is arranged between the release ring and the mandrel, and the lock ring is connected with the release ring and the mandrel through self-locking threads; and the shearing ring is connected with the lower joint through a setting pin. The device is simple in mechanical structure, stable in function and reliable in anchoring force; after sidetrack drilling operation is finished, the tool can be recycled, and follow-up well completion operation is not affected.

The utility model discloses an underground oil sleeve intercommunication valve, including sleeve and the upper joint and lower joint of fixed in the upper and lower ends of sleeve respectively, the upper joint is connected with the lower end of oil pipe, and the inner seal sliding sleeve is arranged in the middle part of the cavity of sleeve, and the sucker rod is arranged in the sleeve and is through the sleeve and inner seal sliding sleeve, and the lower part side of sucker rod is connected with control coupling, and the bottom of the upper joint in the sleeve is provided with upper card station, and the upper and lower ends of inner seal sliding sleeve are provided with elastic inner clamping claw, and elastic inner clamping claw is matched with upper card station and lower card station respectively, the utility model is used for the oil and water well workover operation process, and when lifting oil pipe, the oil and water in the oil pipe are arranged back to the well, and when the oil well needs to be washed hot, the sucker rod is lifted to open the oil discharge passage, and the oil sleeve space is communicated, can be washed well, and after well washing, the sucker rod is lowered, the passage is closed, and the oil is pumped normally, preventing the environmental pollution caused by falling.

The utility model discloses a pipe fitting quick connection structure and a water outlet device, the pipe fitting quick connection structure comprises an upper joint, a lower joint, a sliding barrel and an elastic piece, the upper joint comprises a plug part, the peripheral wall of the upper joint is provided with a first flange, the lower joint comprises a socket part and an elastic arm, the sliding barrel and the elastic piece, the plug part can be inserted into or separated from the socket part, the upper end of the elastic arm is provided with a stress block, and the elastic arm is provided with a second flange. A guide slope is formed on the inner side of the stress block, a third flange is arranged on the inner wall of the sliding barrel in the circumferential direction, and an ejection rib is arranged at the upper end of the inner side of the sliding barrel. When the socket is assembled, the second abutting plane of the sliding barrel abuts against the first abutting plane of the stress block, the first flange abuts against the bottom of the stress block, and when the socket is disassembled, the ejection rib ejects the stress block along the guide inclined plane to enable the elastic arm to bend outwards, so that the plug part is separated from the socket part.

The application discloses a high-temperature and high-pressure cutting recyclable packer. The packer comprises an upper joint, an upper mandrel, a lower mandrel and a lower joint which are sequentially screwed from top to bottom, and further comprises an upper anchoring mechanism which is arranged on the upper middle part of the upper mandrel, a rubber sleeve sealing mechanism which is arranged on the middle part of the upper mandrel, a lower anchoring mechanism which is arranged on the lower middle part of the upper mandrel, a lower slip retreat-stop mechanism which is arranged between the upper mandrel and the lower anchoring mechanism, a setting mechanism which is arranged on the outer periphery of the lower part of the upper mandrel and the lower mandrel, a locking mechanism which is arranged on the outer periphery of the setting mechanism and a releasing mechanism which is arranged on the middle part of the lower mandrel. The packer has the advantages of reliable sealing in a high-temperature and high-pressure environment and high recycling efficiency of the recyclable packer.

The application relates to a cuttable and retrievable packer running service tool and a use method thereof, which are used for oil and gas well completion. An anchoring sealing mechanism is connected between an upper joint and a lower joint of the application, and the anchoring sealing mechanism comprises a supporting sleeve, a central pipe, a sealing nipple, a split threaded claw and a sealing assembly. A cylindrical body of the split threaded claw is longitudinally slotted to form a threaded claw, and the threaded claw is provided with a first shoulder lower surface and a key groove. A torque transmission key is arranged on the supporting sleeve and matched with the key groove, a first shoulder upper surface is arranged on the supporting sleeve, and an outer circumferential surface of a lower part of the supporting sleeve is matched with an inner surface of a lower part of the split threaded claw. An outer pipe and a hanger ring are sleeved on the outside of the central pipe, and the outer pipe is connected with the hanger ring and the sealing nipple respectively. A step is arranged on the outer wall of the central pipe to form a second shoulder upper surface and a third shoulder lower surface. The distance between the third shoulder lower surface and the upper end surface of the sealing nipple is not less than 0.2 m. Since the central pipe and the outer pipe are arranged, the central pipe can be cut and the pipe string can be tripped when the pipe string tripping is unsuccessful.

This invention relates to an isolation packer and a sand control tubing string. The isolation packer includes an upper central tube and a lower central tube, with an intermediate joint fixedly connected between the upper and lower central tubes. An upper joint is fixedly connected to the upper end of the upper central tube. An expansion sleeve assembly is fitted over the upper central tube between the upper joint and the intermediate joint. The expansion sleeve assembly is used to achieve a sealing function by expanding under pressure. An expansion sleeve assembly is also fitted over the lower central tube. The expansion sleeve assembly is used to achieve a sealing function by self-expansion. The expansion sleeve assembly of this invention meets the sand control sealing requirements during the well completion operation stage, and meets the high-temperature sealing requirements during the heat injection and well simmering stages, as well as the sealing requirements under alternating temperatures during the production stage.

The application relates to the technical field of oil workover operation, and particularly discloses a sliding rail type variable-diameter running-in device and a running-in method. The sliding rail type variable-diameter running-in device comprises an upper joint, a driving member, a center body, a split claw, an expansion rib and a locking member, the upper joint is sleeved outside one end of the center body, the locking member is sleeved outside the other end of the center body, one end of the upper joint is used for connecting a downhole tool, the other end of the upper joint is radially spaced apart from the center body and is provided with the axially movable driving member between the center body, the split claw is sleeved outside the center body and is connected with the driving member, the driving member can drive the split claw to move axially, the expansion rib is sleeved outside the center body and is located between the split claw and the locking member, the expansion rib can move radially relative to the center body along with the axial movement of the split claw to change the outer diameter of the sliding rail type variable-diameter running-in device. The running-in device and the method for switching the outer diameter are simple and convenient, and the running-in operation of the multiple sizes of casings can be completed by lifting one operation pipe column.

The utility model discloses a ground control underground Y-shaped oil extraction and test integrated tool. Comprising a Y-shaped tee joint of a Y-shaped structure, and the lower end of the Y-shaped tee joint is connected with an electric pump short section and a tee joint. The upper connector, the connecting cylinder, the hydraulic cylinder, the spring cylinder and the lower connector are sequentially connected to the lower end of the three-way connector from top to bottom. The central pipe is axially and movably arranged in inner cavities at the upper parts of the upper joint, the connecting cylinder, the hydraulic cylinder and the spring cylinder; the upper part of the movable sleeve is connected with the lower part of the central pipe; the spring is arranged in the spring barrel; the overflowing channel and the hydraulic cavity are arranged on the cylinder wall of the hydraulic cylinder in parallel with the axis; the piston assembly is arranged in the hydraulic cavity; and the valve plate seat assembly is connected with the upper part of the connecting cylinder. The utility model has the beneficial effects that the opening or closing of the pipe cavity of the central pipe can be controlled through the hydraulic control pipeline, the blanking plug does not need to be thrown and fished by a steel wire, and liquid production and testing can be selectively carried out.

The invention relates to the field of hydraulic punching and hole forming, in particular to a hole expanding and hole forming drilling tool based on hydraulic reversing and a construction method.The drilling tool comprises an upper connector, a transition sleeve, a lower shell and a lower connector, the upper connector is provided with a hole forming nozzle and a connector overflowing hole, and when the upper connector is sleeved with a sliding sleeve, the hole forming nozzle is shielded in the sliding sleeve; when the sliding sleeve is located at the second position, the hole making nozzle is exposed outside the sliding sleeve; a reversing assembly is arranged in the lower shell and comprises a valve disc rotating relative to the lower shell in the circumferential direction, a valve disc through hole is formed in the valve disc in the axial direction, when the valve disc rotates to a third position, the valve disc through hole is communicated with the through hole in the lower connector through the lower shell, and the sliding sleeve is located at the first position. When the valve disc rotates to a fourth position, the valve disc through hole is not communicated with the through hole in the lower connector, and the sliding sleeve is located at a second position. Mode switching is completed by controlling starting and stopping of water flow, drilling construction in a large-flow state can be achieved, and a drill rod of a special structure does not need to be replaced.

The application belongs to the technical field of communication equipment, and discloses a waterproof cable joint, which comprises an upper joint and a lower joint, a first water-tight cable is arranged in the upper joint, a second water-tight cable is arranged in the lower joint, the core wire of the first water-tight cable and the core wire of the second water-tight cable protrude from the shielding layer, and the shielding layers of the two are grounded; the shape of the lower end of the upper joint can be sealingly matched with the shape of the outer part of the upper end of the lower joint, so as to make the upper and lower core wires conductive and isolate the core wire from the shielding layer; a mounting groove is arranged in the lower joint, a through hole is arranged in the side of the lower joint and communicates with the mounting groove, and a water-tight mechanism is arranged in the mounting groove; when working, the upper joint and the lower joint are in contact, a closed cavity is formed between the two, the cavity is filled with water, the water pressure in the cavity increases with the approach of the two joints, the water-tight mechanism is driven to move downward in the mounting groove, the through hole is outwardly relieved to reduce the water pressure in the cavity, and the upper joint and the lower joint are continuously approached and docked.

This invention relates to the field of medical devices, and in particular to an additive manufacturing porous anti-dislocation shoulder joint prosthesis system and its manufacturing method. The additively manufactured porous anti-dislocation shoulder joint prosthesis system consists of a humeral stem (1), a porous humeral body (2), a porous hemisphere lower end (3), a joint head (4), a double-ended pin (5), a joint head limiting plate (6), a porous hemisphere upper end (7), and a fixing screw (8). The head of the porous humeral body (2) has an outer conical surface that connects to the inner conical hole at the lower end of the porous hemisphere (3). The bottom surface of the lower end of the porous hemisphere (3) has an inner conical surface structure that matches the upper taper of the porous humeral body (2). The upper part of the lower end of the hemisphere (3) matches the joint head (4) as a joint surface. The top surface of the lower end of the porous hemisphere (3) matches the upper end surface (7) of the porous hemisphere with a keyway locking fit. The lower part of the joint head (4) is combined with the upper joint surface of the lower end of the porous hemisphere (3). The joint head limiting plate (6) is used in conjunction with the upper end of the porous hemisphere (7).