828 results about "Upper joint" patented technology

The invention provides a dual-control underground cable intelligent water distributor which comprises an upper connector, an upper shell, a connecting body, a lower shell and a lower connector which are connected in sequence, a central pipe is nested in the upper shell, the two ends of the central pipe are in sealed connection with the upper connector and the connecting body respectively, and an adjusting sleeve is nested in the lower shell. The two ends of the adjusting sleeve are sealed with the connecting body and the lower connector respectively, and the adjusting mechanism, the electric control mechanism and the driving mechanism are arranged in a gap between the upper shell and the center pipe respectively. The dual-control underground cabled intelligent water distributor has the beneficial effects that the dual-control underground cabled intelligent water distributor has two measurement and control processes which do not influence each other, the service life of a pipe column can be effectively prolonged, the dual-control underground cabled intelligent water distributor is suitable for an existing cabled intelligent process pipe column, the cable throwing and fishing measurement and control capability is increased on the basis of an existing cabled intelligent working barrel, and the service life of the cable is prolonged. Therefore, the purposes of two control modes of cabling and measuring and adjusting are achieved, and the requirements of multi-layer-section layered water injection, accurate injection allocation and real-time measuring and adjusting are met.

The invention discloses a compression type packer capable of being repeatedly set, and belongs to the technical field of oil production engineering equipment. A rubber barrel shaft is arranged on the outer circumference of a center pipe, a rubber barrel is arranged on the outer circumference of the rubber barrel shaft, a first sealing ring is arranged at one end of an upper pressing ring, an upper connector is arranged at the other end of the first sealing ring, a cylinder sleeve is arranged at the other end of the rubber barrel shaft, and an anti-resistance nail is arranged on the cylinder sleeve; and a plurality of setting valve core mechanisms and unsetting valve core mechanisms are arranged on the outer circumference of the second sealing ring on the outer circumference of the central pipe. The setting compression type packer is pressed to extrude the first medium container in the packer, hydraulic oil in the first medium container flows into the second medium container through the upper one-way constant-pressure valve element, the hydraulic oil in the second medium container is increased, the pressure is increased, and the internal hydraulic pressure is reduced by increasing the size of the second medium container; the second medium container extrudes the rubber barrel through the central pipe, the rubber barrel expands, the outer diameter is increased, a pipeline is packed, setting and unsetting of the compression type packer are achieved, and the actual production requirement is met.

The invention relates to the field of metal hose performance detection, in particular to a metal hose swing test device. A fixing assembly; the power swinging assembly is connected with the first fixing seat and used for enabling the first fixing seat to move relative to the fixing assembly; one end of the test hose is detachably mounted on the plane of the first fixing seat, and the other end of the test hose is detachably mounted on the plane of the fixing assembly; the axes of the two ends of the test hose do not coincide, so that the test hose is located between the first fixing base and the fixing assembly in a bent state. As the two ends of the test hose are detachably mounted on the first fixing seat and the fixing assembly which can move and be adjusted relatively respectively, and an adjustable relative relation exists between the first fixing seat and the fixing assembly, the mounting positions of the upper joint and the lower joint of the metal hose can be adjusted very conveniently in the actual test process, and the test efficiency is improved. And important parameters such as the joint relative to the swinging center position.

The invention discloses a multistage self-locking type ball catching circulating short section for half-way well cementation and a control method, and relates to the technical field of oil well cementation operation, the multistage self-locking type ball catching circulating short section comprises a short section assembly, the short section assembly comprises an outer shell, a discharge port is formed in the top of the outer shell, a displacement assembly is arranged in the outer shell, and the short section assembly comprises a sliding sleeve connected into the outer shell in a sliding mode; a containing groove is formed in the outer ring of the sliding sleeve, a first ball is slidably connected into the containing groove, an upper connector is fixed to one end of the outer shell, and a lower connector is fixed to the other end of the outer shell. The non-return structure has the beneficial effects that through the arrangement of the short section assembly and the limiting assembly, after the second ball body is put in, the displacement assembly can be driven to slide and displace in cooperation with continuously-fed media and pumping pressure, non-return locking operation is completed, the second ball body is prevented from being disengaged at will, the bypass requirement is well met, and compared with a traditional spring and rubber part non-return structure, the non-return structure is simple in structure and convenient to use. The stability is better, and the well cementation operation is well carried out.

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 invention discloses an oil exploitation packer with an expanding type sealing structure, which belongs to the field of oil field downhole tools and comprises a central tube, an upper joint and a lower joint are respectively arranged at two ends of the central tube, a sealing component and a setting component are sequentially sleeved between the upper joint and the lower joint, and the upper joint and the lower joint are connected with a centralizing component and a reversing component in a matched manner. The sealing assembly comprises an installation pipe sleeved on the central pipe and a rubber sleeve sleeved on the outer side of the installation pipe, a first sliding rod and a second sliding rod which are alternately distributed and linked are arranged on the installation pipe in a sliding mode, and a first pushing block and a second pushing block are respectively hinged on the two sliding rods. When the two sliding rods move towards the setting assembly, the first pushing block and the second pushing block alternately penetrate and are spliced into a sealing ring with the outer diameter larger than the inner diameter of the rubber sleeve. The installation pipe provides a stable installation foundation for all the components, sliding rod linkage ensures that the pushing blocks move coordinately and synchronously, the sealing ring extrudes the rubber barrel to enable the rubber barrel to be expanded to be attached to the well wall to achieve sealing, and formation fluid channeling is effectively prevented. And by adjusting the radian of the push block and the length of the push rod, rapid sealing can be achieved under short-distance movement, and sealing reliability and response efficiency are improved.

The invention discloses a production sliding sleeve, a production tubular column and a production method for a high-temperature gas well of an offshore oilfield. The technical problems that opening and closing control of the production sliding sleeve is tedious, and the adaptability of the production tubular column is poor are solved. The production sliding sleeve comprises a sliding sleeve body of a cylinder structure; the upper joint is arranged at the top of the sliding sleeve main body; the production hole is formed in the sliding sleeve main body; the control cylinder is arranged in the sliding sleeve main body in a sliding manner; the opening hole is formed in the control cylinder; the opening part is used for controlling the sliding sleeve main body to move downwards and enabling the opening hole to be aligned with the production hole; and the closing part is used for controlling the sliding sleeve main body to move upwards and enabling the opening hole and the production hole to be staggered. The structure of the produced sliding sleeve is optimized, rapid and convenient opening and closing control of the produced sliding sleeve is achieved, limitation of well types and well deviation is avoided, the use adaptability is improved, the production method is simpler, and the operation convenience and the operation time efficiency can be improved.

The utility model discloses a whipstock system. The whipstock system comprises a feeding and releasing module and a whipstock, the feeding and releasing module comprises an upper connector, a connecting rod and a supporting sleeve which are connected in sequence, and one side of the supporting sleeve of the feeding and releasing module is inserted into the hollow whipstock; the feeding and releasing module is of a hollow tubular structure; the interior of the upper connector is in threaded connection with one end of the connecting rod, and the other end of the connecting rod is inserted into the whipstock after being connected with the supporting sleeve through a shear pin. A positioning groove is formed in the inclined surface of the whipstock; a boss is arranged at the position, corresponding to the positioning groove, of the upper joint; and the positioning groove is embedded with the boss and is used for driving the whipstock to rotate together when the upper joint rotates. According to the utility model, a main borehole production channel can be reserved while the whipstock is arranged, and the whipstock is simple in structure, convenient to operate and high in reliability.

The invention provides an upper node of a spherical connecting rod. The spherical connecting rod upper node comprises a core shaft and a rubber body wrapping the core shaft, a circle of protrusions with hemispherical sections are arranged on the middle section of the core shaft in the circumferential direction, the protrusions are glued to the inner side of the rubber body, and the outer side of the rubber body is of a cylindrical structure. According to the spherical connecting rod upper joint, the problems that an existing rubber joint is high in deflection rigidity, common in deflection fatigue performance, difficult to meet use requirements and the like are solved.

The invention aims at the technical field of oil drainage devices, and particularly discloses an anti-blocking oil drainage device for an oil field. Comprising an oil discharge pipe and a sliding sleeve, the oil discharge pipe is provided with an oil discharge port, the inner side of the oil discharge pipe is provided with a threaded groove, the outer side of the sliding sleeve is provided with an external thread, the external thread of the sliding sleeve slides in the threaded groove of the oil discharge pipe, the sliding sleeve is provided with a first through hole for installing a filter screen, and when the sliding sleeve moves, the filter screen is arranged in the first through hole. The oil discharging pipe is provided with a first threaded cover, the first threaded cover and the sliding sleeve slide in a sealed mode, the end, away from the oil discharging pipe, of the sliding sleeve is provided with an upper connector, the end, away from the first threaded cover, of the oil discharging pipe is provided with a casing pipe, and the casing pipe is connected with the upper connector. And a fixing ring is fixedly connected in the sleeve. Through shielding of the fixing ring, the situation that wax components separated out from crude oil block the first through hole, and normal operation of oil discharging operation is affected is avoided.

The utility model relates to the technical field of bleeding pipeline positioning, aims to solve the problem that the size of a clamping sleeve pipeline does not meet the assembly requirement due to the fact that deviation exists when all pipelines are manually positioned in the prior art, and provides a bleeding pipeline positioning clamp tool of hydrogen energy filling equipment. At least two positioning blocks are mounted on the reference platform, and the positions of the positioning blocks correspond to the position of a safety valve on the hydrogen energy filling equipment; one end of the positioning block is connected with an adapter, the adapter comprises a lower joint, an upper joint and a middle connecting piece, one end of the lower joint is fixedly connected with the positioning block, the other end of the lower joint is detachably connected to the middle connecting piece, one end of the upper joint is detachably connected to the middle connecting piece, and the other end of the upper joint is detachably connected to the middle connecting piece. The other end of the upper connector is used for being fixedly connected with a pipeline. By means of the clamp tool, the positioning accuracy of the pipeline is high, errors are small, and it is guaranteed that the size of the clamping sleeve pipeline meets the assembly requirement.

The invention relates to an automatic flushing screen pipe, and belongs to the technical field of oil well oil pumping equipment. The device comprises an upper connector which is in threaded connection with an oil well pump, the upper portion of a center pipe is sleeved with a supporting base, and a supporting block and a third spring are installed in a groove of the supporting base; the lower portion of the center pipe is sleeved with the screen pipe, and a liquid inlet valve hole and a liquid outlet valve hole are formed in the middle of the center pipe and provided with a liquid inlet check valve set and a liquid outlet check valve set respectively. And the lower end of the flushing pipe penetrates through the locking ring to be fixed. And a piston chamber is formed among the central pipe, the supporting seat, the outer protective pipe and the valve ring. The piston chambers are alternately expanded and compressed by utilizing the relative movement of the central pipe and the supporting seat during the up-down stroke of the oil well pump, gas and liquid are driven to wash the screen pipe through the washing holes, and meanwhile the screen pipe is driven to rotate. The screen pipe can be effectively prevented from being blocked, the service life of the screen pipe is prolonged, and the oil well yield is improved.

The invention relates to the technical field of oil exploitation, in particular to a small casing gravel packing sand prevention tool and a using method. According to the technical scheme, liquid through holes are distributed in the outer wall of an outer pipe, a winding wire is wound on the outer wall, one or more supporting ribs are arranged between the winding wire and the outer wall of the outer pipe, and the lower end of the outer pipe is connected with a screen pipe through a lower connector; a cylinder sleeve is mounted at the upper end of the inner pipe, the upper end of the cylinder sleeve is connected with an upper joint, and the lower end of the inner pipe is connected with a washing pipe through an inner lower joint; a plurality of well washing holes are formed in the upper portion of the inner pipe, a piston and a spring are arranged between the cylinder sleeve and the outside of the well washing holes of the inner pipe, and a plurality of circulating well washing holes are formed in the cylinder sleeve. The outer wall of the upper connector is connected with the inner wall of the upper portion of the outer pipe through a locking block and a shear pin. The filling sand prevention device has the advantages that filling sand prevention of a large-displacement and high-sand-ratio stratum with the small inner diameter of a sleeve and the limited internal space of a filling tool can be achieved, filling is conducted through an oil sleeve annulus, the circulation area is larger, and in addition, the filling sand prevention device is simpler in structure and safer and more convenient to construct.

The invention provides an anchoring packer for a multilateral well and multilateral well drilling equipment. The anchoring packer comprises a mandrel assembly, an anchoring mechanism and a rubber sleeve sealing mechanism. The mandrel assembly comprises an upper connector with a pressure transmission hole and a mandrel forming a first pressure cavity with the upper connector. The anchoring mechanism comprises an upper slip arranged on the mandrel in a sleeving mode, a conical sleeve and a first piston assembly, the conical sleeve is in sliding connection with the upper slip through an inclined face, and the conical sleeve and the mandrel are limited through a first shear pin. The rubber sleeve sealing mechanism is arranged below the anchoring mechanism and comprises a second piston assembly, a rubber sleeve and an extrusion sleeve, and the overlapping position of the second piston assembly and the first piston assembly is connected through a second shear pin. The mandrel is provided with a hydraulic channel communicated with the first pressure cavity and the second pressure cavity. During operation, hydraulic oil enters through the pressure transmission hole to drive the first piston assembly to move upwards to cut off the first shear pin, and the conical sleeve is pushed to enable the upper slip to anchor the well wall in the radial direction; meanwhile, the second piston assembly is driven to move downwards to cut off the second shear pin, and the rubber sleeve is extruded to radially expand to achieve sealing.

The invention relates to the technical field of water distributors, in particular to an underground water distributor for oil exploitation, which comprises a main pipeline, two ends of the main pipeline are fixedly connected with an upper joint and a lower joint respectively, the main pipeline is slidably connected with an opening valve, a return spring is arranged between the opening valve and the upper joint, the opening valve is in contact with the lower joint, and the main pipeline is provided with a water distribution core. A first sliding block is connected to the water nozzle in a sliding mode, valve plates are arranged on the two sides of the water nozzle, the first sliding block can slide along with changes of pressure and drive the valve plates on the two sides to move, the opening size of the water nozzle can be controlled through movement of the valve plates, and therefore the water nozzle can be conveniently adjusted; when the size of the water nozzle on a certain layer is actively adjusted, the sizes of the water nozzles on other layers can be automatically adjusted according to the water flow pressure change, so that the water nozzles on other layers are prevented from being respectively tested and adjusted when the water nozzles of the water distributor on a certain layer are adjusted, and the working efficiency is improved.

The invention relates to the technical field of cranes, and discloses a manufacturing process method of a flexible leg of a gantry crane, which comprises the following steps of: manufacturing an upper joint of the flexible leg: assembling and welding a small group in advance, assembling and welding a top plate small group, assembling and welding a barrel body, assembling a peripheral component and assembling a flange component; manufacturing a flange section cylinder body, manufacturing a middle section cylinder body group, and manufacturing a single supporting rod; manufacturing a lower cross beam of the flexible leg: manufacturing small components, manufacturing plane sections, manufacturing box-shaped sections, welding the box-shaped sections, assembling and welding lug plate components, and assembling and welding components with round top and square bottom; and folding in a factory. According to the process, through segmented machining and small-segment manufacturing, the precision of the whole device is improved, meanwhile, the period on a jig frame is shortened, the installation efficiency is high, and the precision is high.

A liquid-cooling heat dissipation structure having a nonlinear fin array. The liquid-cooling heat dissipation structure includes an upper plate, a lower plate, and a flow guide member. The upper plate has an accommodating groove of which an inner side has an upper joint area formed thereon. The lower plate has a lower joint area. The flow guide member disposed between the upper plate and the lower plate includes a heat dissipation plate body having a first surface and a second surface, and a plurality of heat dissipation columns integrally disposed on the second surface. The upper brazing area is connected to the lower brazing area, and two ends of the flow guide member are respectively connected to the upper joint area and the lower joint area to form an enclosed cavity for accommodating the heat dissipation columns.

The invention discloses a self-setting packer and belongs to the technical field of petrochemical engineering. The device comprises an upper connector and a lower connector, a lifting sleeve is installed in an inner hole of the upper connector, and the lower end of the upper connector is connected with an upper pressing ring through a deblocking shear pin; a rubber cylinder shaft is fixedly mounted on the outer side of the lifting sleeve, and a balance piston, a sealing sleeve, an upper pressing ring, a rubber cylinder and a sealing push cylinder are sequentially arranged on the rubber cylinder shaft in a sleeving manner from inside to outside; the lower end of the rubber sleeve shaft is connected with a central pipe through a locking sleeve; the lower end of the central pipe is in threaded connection with a lower joint; the sealing push cylinder sleeves the outer side of the central pipe, and the inner wall of the upper part of the sealing push cylinder is in sealing fit with the outer wall of the locking sleeve to form a primary vacuum piston cavity; the lower end of the sealing push cylinder is in threaded connection with a lower-stage piston, and a starting piston is installed on the outer side of the lower-stage piston in a limited mode through a shoulder. The packer can directly seat a well mouth after descending into a well in place along with a tubular column, pressing is not needed, the tubular column does not need to be lifted and put down, and automatic setting of the packer is achieved through timing liquid inlet and liquid column static pressure.

The invention belongs to the technical field of oil field packing, and relates to a gradually-expanding packer for an oil field. Comprising a central pipe, the central pipe is fixedly connected with a connecting sleeve, a lower connector and an upper connector, a rubber cylinder is fixedly connected between the central pipe and the upper connector, the central pipe is provided with a through hole, and a cavity is formed among the central pipe, the upper connector and the rubber cylinder; the sliding sleeve is connected to the central pipe in a sliding manner; the protective cylinder is rotationally connected to the sliding sleeve, and the protective cylinder wraps the rubber cylinder; and the transmission mechanism is arranged between the connecting sleeve and the upper joint and is used for enabling the protective barrel and the rubber barrel to slide relatively. The protective cylinder covers the rubber cylinder in the lowering process, so that the rubber cylinder is prevented from being rubbed by the well wall in the lowering process, the normal shape of the outer side of the rubber cylinder is guaranteed, and then the sealing effect after the rubber cylinder makes contact with the well wall in the follow-up process is improved.

The invention provides a special-shaped test piece fatigue test loading device. The special-shaped test piece fatigue test loading device comprises an upper connector, a lower connector, a main shaft, a transverse shaft, a lower connector transverse shaft, a clamping plate, a bolt, a support and a clamping block. The test piece is connected through the main shaft and the two transverse shafts, and the support and the test piece are connected through the clamping plates and the bolts. The pull rods on the single-lug upper connector and the double-lug lower connector are clamped on an electro-hydraulic servo fatigue testing machine, and loading of a test piece is achieved through pulling and pressing of the testing machine on the lugs of the upper connector. The strain measuring device comprises a strain gauge and a signal transmission processing device, and the strain gauge is installed on a main examination part of the test piece according to test requirements. Through the fatigue test device, accurate load application of the special-shaped structural member is realized, and a fatigue test is completed.

The utility model discloses a lower limb of a robot, which belongs to the field of robots and can improve the moving stability of the robot and enable the robot to be easier to fall down by arranging an auxiliary leg component 4 outside a thigh component 2 and a shank component 3, and can overcome the defects in the prior art. The robot lower limb comprises a thigh mounting seat 1, two thigh assemblies 2, two shank assemblies 3 and at least one auxiliary leg assembly 4, the thigh assembly 2 comprises a thigh main body 21 and a thigh driving unit 22; the shank assembly 3 comprises a shank main body 31, a shank driving unit 32 and a shank moving unit 33; the auxiliary leg assembly 4 comprises an auxiliary leg main body 41, an auxiliary leg driving unit 42 and an auxiliary leg moving unit 43, an upper joint of the auxiliary leg main body 41 is installed on the thigh main body 21, the auxiliary leg moving unit 43 is arranged on a lower joint of the auxiliary leg main body 41, and the auxiliary leg driving unit 42 is installed on the thigh main body 21 and used for assisting the leg main body 41 to move around the thigh main body 21.

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 sliding sleeve capable of plugging water, which comprises an upper joint, an outer cylinder and a lower joint, the inner wall of the upper end of the outer cylinder is fixedly connected with the outer wall of the lower end of the upper joint, and the inner wall of the lower end of the outer cylinder is fixedly connected with the outer wall of the upper end of the lower joint; a setting ball seat is arranged in the outer cylinder in a sleeved mode, and a shear screw is arranged between the setting ball seat and the outer cylinder. The setting ball seat can be matched with the soluble ball or the ball rod assembly to block an internal channel of the setting ball seat; a plurality of through overflowing holes matched with the setting ball seat are formed in the side wall of the outer cylinder in the circumferential direction. In the construction process or in the later period of construction, water may be discharged after a lower gas layer is exploited, water drainage or water plugging operation must be performed once water is discharged from a gas well, so that the influence on the production of an upper gas layer is avoided, at the moment, a ball rod assembly matched with the sliding sleeve can be thrown from a wellhead and is locked in a setting ball seat of the sliding sleeve through pumping, and the ball rod assembly is locked in the setting ball seat. And at the moment, the sliding sleeve can block the lower air layer below, so that the production of the upper air layer is not influenced.

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.

A carbon dioxide injection sealing assembly belongs to downhole operation tools in the petroleum industry, is used for downhole carbon dioxide injection, and particularly relates to a carbon dioxide injection sealing assembly structure of a salvageable intubation bridge plug. The utility model provides a carbon dioxide injection sealing assembly which can solve the problems that after an underground tool is used for injecting carbon dioxide, the underground tool cannot be pulled out, and long-term sealing is achieved. The device is characterized in that an upper joint is in threaded connection with an insertion tube, a back cap is in threaded connection with a sealing cylinder, a gasket, a first combined seal, a baffle ring and a second combined seal are arranged in the sealing cylinder, and a guide sleeve is in threaded connection with the sealing cylinder. The upper pressing ring is in threaded connection with the sealing cylinder. The rubber cylinder, the spacer ring and the pressing ring are sleeved on the rubber cylinder shaft; and the rubber cylinder shaft is in threaded connection with the sealing cylinder.

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 small fallen object fishing cylinder which is characterized by comprising a cylinder body, an upper connector is arranged at one end of the cylinder body, a lower connector is arranged at the other end of the cylinder body, the lower connector is connected with a milling shoe or a pulling hook, and through the large drift diameter design of a second inner cavity, the fishing requirement of rubber or other large-diameter small fallen objects in a well is met. The adaptability to falling objects with different sizes is improved; a milling shoe is designed aiming at the scaling problem of the casing wall, and the scale can be removed through ground rotation, so that a fishing tool can smoothly reach the fish top position, and the fishing operation can be smoothly carried out; a pulling hook is designed for solving the problem that small iron falling objects are prone to being stuck, the stuck falling objects can be pulled out, and the fishing success rate is increased. The lengthened fishing cavity is designed, the situation that the number of small falling objects is large can be handled, and the fishing efficiency is improved.

The invention relates to the field of truss structure design, and provides a connection reinforcing structure of a spacecraft carbon fiber composite truss, a manufacturing method and an effect verification method.The connection reinforcing structure of the spacecraft carbon fiber composite truss comprises a connector piece, a carbon fiber composite rod piece, a Z-pin and a normal-temperature structural adhesive layer; the connector piece comprises an upper connector tool and a lower connector tool, and one end of the upper connector tool and one end of the lower connector tool are assembled into the upper end and the lower end of the carbon fiber composite rod piece correspondingly. And the upper joint tool and the carbon fiber composite material rod piece as well as the lower joint tool and the carbon fiber composite material rod piece are coaxially glued and assembled through a normal-temperature structural adhesive layer. The Z-pin can lock the laying layer by virtue of the friction effect and the interface bridging effect of the Z-pin and the composite material, the transmission path of interlayer shear force is optimized, and the layering damage of the laying layer is inhibited, so that the connection performance of the carbon fiber composite material truss is improved.

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 present invention discloses a foot-operated folder, comprising an upper joint, a lower joint, a rotating device, a locking device, a slider, a foot pedal, and a first rotating shaft. The upper joint and the lower joint are hingedly connected, the rotating device is fixed to the upper joint, the slider and the first rotating shaft are both connected to the rotating device, the foot pedal is fixed to the first rotating shaft, the foot pedal is used to drive the rotating device to drive the slider to lock or open the upper joint and the lower joint, the locking device comprises a foot rod, a stepped shaft, and an elastic component, the foot rod is rotationally connected to the upper joint, the upper joint is provided with a stepped hole, the stepped shaft passes through the stepped hole and is hingedly connected to the foot rod, the elastic component is located in the stepped hole, the first rotating shaft is provided with a second keyway, the foot rod and the elastic component are respectively used to drive the stepped shaft to move out of and insert into the second keyway. The foot-operated folder provided by the present invention can be locked and opened easily and quickly by the user, making it more convenient to use.