362 results about "Shear pin" patented technology

The support comprises an upper seat plate, a spherical crown lining plate, a middle steel lining plate and a lower seat plate, the upper seat plate is fixedly installed at the bottom of a beam bottom, the spherical crown lining plate is arranged between the upper seat plate and the middle steel lining plate, the middle steel lining plate is arranged between the spherical crown lining plate and the lower seat plate, and the spherical crown lining plate is fixedly installed on the lower seat plate. The lower seat plate is fixedly mounted at the top of a bridge pier, the bottom surface of the upper seat plate is fixedly connected with a first limiting ring through a first anti-shear pin, the first limiting ring abuts against the middle steel lining plate, the top surface of the lower seat plate is fixedly connected with a second limiting ring through a second anti-shear pin, and the second limiting ring abuts against the middle steel lining plate. In a normal use state, the slip surface adopts a large curvature radius and a small friction coefficient to provide smaller damping, reduce the acting force of the support on a bridge and reduce the lifting of a beam end, and in an earthquake state, the slip surface adopts a small curvature radius and a large friction coefficient to provide larger damping, so that the shock absorption and isolation effect of the support is improved; and displacement of the bridge under the earthquake condition is controlled.

A fastening device for releasable connection to a perforated rail of an aircraft and a method of assembly for such a fastening device. The fastening device comprises a housing having at least one locking head portion fixedly connected to the housing, at least one shear pin and an actuating pin. The locking head portion is insertable into a rail hole of the perforated rail and slidable along the longitudinal direction of the perforated rail to a locking position in which the locking head portion engages a slot portion of the perforated rail. The shear pin can be engaged with a rail hole of the perforated rail by axial displacement. The actuating pin is rotatably arranged relative to the housing and connected to the shear pin in such a way that a rotation of the actuating pin causes an axial displacement of the shear pin relative to the housing.

The invention relates to the technical field of open flow after oil field fracturing, in particular to an oil pipe temporary plugging device and an oil pipe temporary plugging short starting method. According to the oil pipe temporary plugging device and the oil pipe temporary plugging short starting method, the outer cylinder is put into a well along with a pipe column, a plugging device is put in, the pipe column is fixed and plugged through a machine body structure and a positioning mechanism, the pipe column is lifted to enable a large-diameter tool to be located above a fractured stratum, then pressure is applied to the interior of the well to enable a shear pin to be fractured, and the pressure pushes a valve element to move downwards; and after the pipe column recovers circulation, the blowout work is continued. According to the oil pipe temporary plugging device and the oil pipe temporary plugging short starting method, the outer cylinder is put into the well along with the fracturing pipe column, then the plugging device is put, the fracturing pipe column is plugged, large-diameter tools such as a packer in the pipe column are lifted to the position above the fracturing well section, then open flow is recovered, sand can be settled to the artificial well bottom after formation sand production, the pipe column cannot be influenced, and the oil pipe temporary plugging short starting method has the advantages of being simple in structure and convenient to operate. And the phenomenon that large-diameter tools such as a packer are buried and blocked by gravels, so that a pipe column is buried by sand and blocked by the gravels is avoided.

The invention discloses a gas well swabbing and draining device and a swabbing and draining method thereof, and relates to the technical field of drainage and gas recovery equipment.The gas well swabbing and draining device comprises a production oil pipe, a continuous oil pipe and a drainage pipe, the swabbing liquid discharge plunger comprises a connecting cylinder, and a pressure control spring is arranged at the axis position of the connecting cylinder; the first end of the piston with the long rod is fixed to the connecting cylinder through a shear pin with a fixed shear value; and the pressure relief channel is arranged on the outer side wall of the connecting cylinder. According to the gas well swabbing and draining device, the technical problems that a swabbing and draining plunger in an existing gas well swabbing and draining device is difficult to maintain automatic draining, and a continuous oil pipe and the swabbing and draining plunger are damaged due to too large downward pulling force are solved; when the pressure difference between the upper end position of the swabbing and liquid discharging plunger and the lower end position of the swabbing and liquid discharging plunger is larger than a first design value, accumulated liquid can be discharged into the gas well through the first center channel, and the downward pulling force borne by the coiled tubing and the swabbing and liquid discharging plunger is reduced.

The packer comprises a mandrel and an outer pipe assembly, a first reducing assembly comprises an upper cone, a first auxiliary block and a first supporting block, and the first auxiliary block and the first supporting block are arranged in a staggered mode; the second reducing assembly comprises a lower cone, a second auxiliary block and a second supporting block, the hydraulic cylinder assembly comprises a hydraulic cylinder, a limiting piston, a fixing ring and a piston are sequentially arranged in the hydraulic cylinder from top to bottom, the hydraulic cylinder is used for being connected with the lower cone, the limiting piston is connected with the hydraulic cylinder through a setting shear pin, and the piston is connected with the outer pipe assembly and the slip assembly. The second auxiliary blocks and the second supporting blocks are arranged in a staggered mode. According to the technical scheme provided by the invention, the problem that a conventional packer cannot be set on a standard casing pipe after passing through the casing pipe when the casing pipe is continuously used after being repaired is solved. The packer has the advantages of being large in sealing annulus, high in pressure bearing capacity and the like.

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 field of packers, in particular to a high-sealing-performance recoverable anchoring packer which comprises a connecting sleeve used for tripping the packer into an oil pipe, and a releasing pipe column is coaxially and fixedly arranged in the connecting sleeve; the top end of the sliding sleeve is mounted in the connecting sleeve in a matched and sliding manner through a piston, and the sliding sleeve is used for transmitting pressure downwards along the axis; the sealing assembly comprises an upper pressure-bearing seat and a lower pressure-bearing seat, the bottom end of the sliding sleeve is fixedly connected with the top end of the upper pressure-bearing seat, and a sealing rubber sleeve is arranged between the upper pressure-bearing seat and the lower pressure-bearing seat; the anchoring assembly comprises a slip cylinder, and anchoring slips capable of moving in the radial direction are evenly installed on the outer wall of the slip cylinder; the locking assembly comprises a lock sleeve, a fishing pipe and a lock ring. The anchoring and sealing processes are sequentially carried out in single setting, anchoring is stable, the sealing effect is good, setting efficiency can be improved, meanwhile, relative rotation between the fishing pipe and the lock sleeve and relative rotation between the fishing pipe and the sliding sleeve can be prevented, and accidental breakage of the setting shear pin or the unsetting shear pin is avoided.

The utility model discloses a novel standard valve which comprises a fishing head, an outer pipe assembly is fixedly arranged on the fishing head, an inner pipe assembly is movably arranged in the outer pipe assembly, a valve element assembly is fixedly arranged on the inner pipe assembly, and the valve element assembly is arranged at one end of the outer pipe assembly. According to the novel standard valve, the outer pipe assembly, the inner pipe assembly and the shear pin are used in cooperation, so that the novel standard valve is in different states in the working process and the throwing and fishing process, and in the working state, fluid can be blocked from left to right and can circulate from right to left; in a salvage state, left and right fluids can circulate; the Tesla valve is characterized in that when the Tesla valve is in a working state, fluid needs to pass through the Tesla valve channel, due to the uniflow property of the Tesla valve channel, the fluid cannot pass through the fluid channel smoothly, the purpose of preventing the fluid from flowing is achieved, when the right liquid flows through the Tesla valve channel in the forward direction, the right liquid can pass through the Tesla valve channel smoothly, the overall structure is simple, and operation is convenient. Not only is the use cost reduced, but also the well control risk during oil well operation is reduced.

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 is a washable well gravity setting side flow packer used in simple separate layer water injection string, belonging to oil production engineering application technology. The invention has two structures. The first structure shown in figure 1 is composed of upper body 1, center tube 2, big spring 4, liner 9, wash well piston 6, rubber cylinder group 10, lower body 16 and setting shear pin 15. The second structure shown in figure 2 is different from the first structure in that there is no upper side flow channel, but the lower side flow channel is provided with a check valve. The gravity setting side flow packer is used for separate layer water injection, and the water distribution plugger can be set on the center tube of the packer, without using independent water distributor, thus being beneficial to fine layer water injection and convenient for plugger fishing. The packer setting does not need pump truck pressure, but relies on pipe string heavy pressure for setting, and there is no problem of pipe string overload during pipe string lifting, thus simplifying the separate injection process.

The utility model relates to the technical field of oil well liquid drainage, in particular to a negative pressure liquid drainage device. Comprising an upper connector, a sealing conical surface is formed in the upper connector, the lower end of the upper connector is fixedly and hermetically connected with an outer cylinder, the lower end of the outer cylinder is fixedly and hermetically connected with a lower connector, a piston blind plate is arranged in the lower connector, connected with the lower connector through a shear pin and in sealed contact with the upper connector, and a screen pipe is fixedly and hermetically connected in the lower end of the piston blind plate. The lower end of the screen pipe extends to the position below the lower connector and is blocked. The screen pipe and the piston blind plate are automatically released through fracture of the shear pin, external power or manual intervention is not needed, instant communication of a shaft and an oil pipe column is achieved, and the liquid drainage starting time is remarkably shortened.

The invention discloses a cement retaining device, which relates to the technical field of petroleum drilling, and comprises an upper joint, a long central pipe and a sealing sleeve, a piston is fixed through a setting shear pin and is hydraulically driven to act; the lower end of the piston is connected with an elastic claw and can transmit setting force and achieve releasing separation, and the lower portion of the piston is connected with a compression cylinder and an upper conical head in series through a claw connector. The anchoring mechanism is composed of an upper conical head, a lower conical head, an anchor tooth block and the like and can expand in the radial direction to clamp the casing pipe during setting. The compression sleeve linked with the rubber sleeve assembly can extrude the rubber sleeve assembly to realize sealing; the cement injection channel is composed of a lower connector, a one-way valve and a cement injection head and ensures one-way cement injection. The design that an unblocking fishing head, a thrust ring and inner teeth of a compression cylinder are meshed is adopted in the unblocking mechanism, the thrust ring can be retracted by lifting the fishing head upwards, and therefore anchoring and sealing are relieved. Setting, squeezing and sealing, cement injection and fishing operation are achieved through one pipe column, a large-drift-diameter cement injection channel is provided after releasing, finally, the whole body is fished out of a well, no fish is left at the bottom of the well, drilling and grinding are not needed, and construction operation and well plugging cost is saved.

The application discloses a shearing pin embedded outer package super high performance concrete-steel pipe concrete swing bridge pier, which is applied to a bridge and comprises a bearing platform and a composite pier column arranged on the bearing platform, a shearing resistance assembly is embedded in the lower part of the composite pier column and matched with the bearing platform, and a UHPC layer of the composite pier column and a steel pipe layer-concrete column (steel pipe concrete CFST) form a swing bridge pier (UHPC-CFST swing pier); this makes the scheme capable of utilizing UHPC and CFST to improve the toughness of the body, and capable of solving the swing rotation and shearing limiting contradiction of the bridge pier system through a connecting structure; the scheme improves the impact resistance and compression crushing resistance through the collaborative stress of the UHPC shell and the internal CFST, realizes the compatibility of high shearing bearing capacity and excellent self-resetting capacity through the 'limiting translation and releasing rotation' mechanism of the CFST shearing pin and the steel sleeve ring cooperation, and can solve the problems of insufficient interface shearing capacity of the existing swing bridge pier under strong earthquakes and impact loads and easy compression crushing of the pier bottom.

A tool for replacing a shear pin of a water guide mechanism of a water turbine comprises a bottom plate, sliding grooves are formed in the two sides of the bottom plate respectively, sliding blocks are arranged in the sliding grooves, positioning blocks are arranged on the sliding blocks, and the positioning blocks are used for being matched with original bolts on the water guide mechanism to achieve installation and fixation of the tool. A lifting plate is arranged on the bottom plate, a hydraulic cylinder bearing plate capable of horizontally moving is arranged on one side of the lifting plate, two hydraulic cylinders are arranged on the hydraulic cylinder bearing plate, push rods of the two hydraulic cylinders are oppositely arranged, clamping blocks are arranged on the push rods, and the two clamping blocks make contact with each other and clamp the auxiliary crank arm. By the adoption of the structure, the auxiliary crank arm can be effectively jacked, shear pin mounting holes of the main crank arm and the auxiliary crank arm can be conveniently and rapidly aligned, and the problems that in the prior art, a jack is difficult to fix and fails are solved.

This invention relates to a fishing tool for well workover operations in oil and gas field exploration and development. It discloses a hands-free fishing barrel suitable for both mechanical and hydraulic dual-action. The barrel includes a shell assembly with a central connecting sleeve. An outer piston is fitted onto the outer circumference of the central connecting sleeve, forming a liquid-containing cavity I between the central connecting sleeve and the outer piston. An inner piston is fixedly connected to the central connecting sleeve via a shear pin. The upper ends of the central connecting sleeve and the inner piston enclose a liquid-containing cavity II. A slip and a milling shoe are fixedly connected to the lower end of the outer piston. After a ball is dropped into the neck of the central connecting sleeve, the fluid inside the tubing is pressurized. The fluid enters liquid-containing cavity I, pushing the outer piston upward and causing the slip to move upward. The fluid then enters liquid-containing cavity II, continuing to pressurize, causing the shear pin to break and the inner piston to move downward. This invention's hands-free fishing barrel, suitable for both mechanical and hydraulic dual-action, has a simple structure, is easy to operate, has high operational efficiency, and good performance.

The invention relates to the field of well cementation, and provides an induction type grading well cementation tool, grading well cementation equipment and a grading well cementation method.The induction type grading well cementation tool comprises a main shell, an induction type grading well cementation device and a grading well cementation method.The main shell is provided with a circulating hole penetrating in the radial direction; the inner sliding sleeve is arranged in the main shell, a first hydraulic cavity and a second hydraulic cavity are defined by the inner sliding sleeve and the main shell, and the inner sliding sleeve is provided with a radial through circulation opening; and the oil pump is communicated with the first hydraulic cavity and the second hydraulic cavity. According to the technical scheme, a shear pin is not needed, the problem that the pressure of the shear pin of a traditional grading well cementation tool is not accurate can be effectively solved, and well cementation accidents are avoided.

The present invention relates to a grid transmission over-torque protection device and method. The device comprises a driven sprocket sleeve mounted on a sprocket sleeve, the driven sprocket and the sprocket sleeve being concentrically arranged, a shear pin connecting the driven sprocket and the sprocket sleeve; a touch rod connected to the driven sprocket, a rotating shaft connected to the sprocket sleeve and disposed away from the axis of the sprocket sleeve, the rotating shaft and the touch rod being parallel to each other; a detection rod mounted on the rotating shaft, the detection rod being configured to rotate about the rotating shaft from a first state to a second state when subjected to an external force; in the first state, the first end of the detection rod is located on the moving trajectory of the touch rod, and the second end of the detection rod blocks the axis of the sprocket sleeve; in the second state, the first end of the detection rod abuts the touch rod, and the second end of the detection rod is offset from the axis of the sprocket sleeve; a proximity switch is further away from the sprocket sleeve than the detection rod, and the proximity switch is oriented toward the axis of the sprocket sleeve. The device can promptly detect the occurrence of over-torque and promptly cut off power transmission when over-torque occurs.

The utility model relates to a ground fast multi-machine launching platform, which comprises a launching rack (1) and a pulley (2), the pulley (2) comprises a booster (3), a pulley limiting plug (4), a shear pin (5), a sliding block (6), a groove (7) and a pulley body (8), and the launching rack (1) comprises a profile welding structure (9) and a guide rail (10). According to the ground rapid multi-machine launching platform, the multi-machine launching requirement can be met, meanwhile, the development expenditure can be reduced, the development period can be shortened, and the design efficiency can be improved.

The invention provides an expansion leaking stoppage device and a technological method. The expansion leaking stoppage device comprises a lifting nipple, the lower end of the lifting nipple is connected with a hanging load sensor through threads, the upper end of the lifting nipple is connected with a transition connector, and a drill rod is connected with the hanging load sensor through threads and connected with a connecting rod through a conversion connector. The lower end of the connecting rod is in threaded connection with the upper end of the expansion short section, the lower end of the expansion short section is in threaded connection with the torque short section, and the transition joint, the lifting short section, the drill rod, the conversion joint, the connecting rod, the expansion short section and the torque short section form an inner-layer tubular column; the upper end of the expansion pipe is fixed on the conversion connector through a shear pin, and the lower end of the expansion pipe is connected with the floating valve through floating valve external threads to form an outer-layer pipe column together with the floating valve. The turntable drives the inner-layer tubular column and the outer-layer tubular column to rotate into a well; the expansion pipe is tightly attached to the well wall of the open hole by pressurizing the expansion pipe nipple, well drilling open hole malignant leakage plugging is achieved, and therefore the problem of drilling fluid leakage is solved.

A barrier (10), comprising an elongate arm (12); a shaft (28) extendable through the arm (12) in orthogonal relationship thereto, the shaft (28) being rotatable with the arm (12) as a unit; a column (42, 33, 46) from which the shaft (28) is supportable, the column (42, 33, 46) having an internal chamber (70) through which a portion of the shaft (28) is extendable; and at least one shear-resistant structure positioned within the internal chamber (70) in shear-receiving relationship to the shaft (28). The shaft (28) extends through the arm (12) in orthogonal relationship thereto, the column (42, 33, 46) supports the shaft (28) and the at least one shear-resistant structure is positioned within the internal chamber (70) in shear-receiving relationship to the shaft (28). This shear-resistant structure help to dissipate shear energy that might be transmitted to the shaft (28) as a result of a vehicular collision with the arm (12). The shear-resistant structures include first and second shear plates (110, 112), which are threaded onto the shaft (28), and a shear pin (114), which extends orthogonally through the shaft (28).

The present application relates to the technical field of welding, in particular to a welding robot and a welding method thereof and related products, comprising: a central control case, a walking support assembly, a welding assembly, an environment sensing assembly and a control assembly, the upper end of the walking support assembly is connected with the central control case, the lower end of the walking support assembly is adsorbed on a shaped steel and located in a passage between two adjacent shear pins; the welding robot provided by the present application acquires gap information of a walking passage in real time by using a first sensor, judges path obstacles by comparing with a reference or a threshold value, calculating a severity index and aggregating evaluation; when it is detected that there is a passable obstacle in the path of the front support leg, a smooth obstacle avoidance path function is calculated and generated based on the evaluation result, the function containing detour and recovery and the trajectory form being adaptively adjusted; a 'front row planning, rear row following' strategy is adopted, combined with trajectory storage and reproduction, to control the robot to travel along the calculated path or stop when necessary.

The utility model belongs to the technical field of electronic aluminum foil casting equipment, and relates to an inner guide type oil cylinder shear pin type torque limiter which comprises a shell and a connecting piece, and the top of the shell is connected with jacked equipment; the connecting piece is arranged in the shell, and the lower portion of the connecting piece is fixedly connected to an oil cylinder plunger rod head flange. A cover plate is arranged on the upper portion of the connecting piece, and a shear pin is arranged between the cover plate and the connecting piece. And a transmission piece for transmitting torque is arranged between the cover plate and the shell. When the torque is larger, the shear pin is sheared off, so that the plunger rod of the oil cylinder below is protected from being affected by the torque, and an inner guide key and a key groove of the cylinder body in the oil cylinder are protected from being damaged.

The utility model provides a hydraulic spray gun for fracturing, and belongs to the technical field of underground mining equipment for promoting yield by forming cracks or cracks. The hydraulic spray gun for fracturing comprises a spray gun body, the spray gun body is provided with a spraying structure used for spraying fracturing fluid into a stratum, a sliding sleeve is arranged in the spray gun body, the end of the spray gun body is connected with a connector in a sealed mode, and a stopping step is arranged on the inner wall of one of the connector and the spray gun body. A shear pin seat is clamped between the other end face of the sliding sleeve and the stopping step, the shear pin seat is located on the inner side of the sealing connection portion of the spray gun body and the connector, a shear pin is installed on the shear pin seat, a ball seat is installed at the end of the sliding sleeve, an inner conical face used for being in contact sealing fit with a ball sealer is arranged on the ball seat, and a positioning groove is formed in the peripheral face of the ball seat. And the end part of the shear pin is inserted into the positioning groove. According to the utility model, after the shear pin is sheared off, fracturing fluid cannot leak to the outside through the position of the shear pin, and the jet fracturing effect of the jet structure is not influenced.

The invention provides a novel suspension packer which comprises a mandrel in a barrel shape. The upper joint sleeves the outer side of the upper end of the mandrel and is fixed with the mandrel; the connecting sleeve sleeves the outer side of the upper joint and is fixed with the upper joint; the lower end of the setting push cylinder is connected with the connecting sleeve through threads; the locking device comprises a locking ring seat and a locking ring; the upper slip device comprises an upper slip seat, an upper pressing plate and an upper slip; the upper cone sleeves the mandrel and is fixed with the mandrel through a shear pin, the outer diameter of the upper end of the upper cone is smaller than that of the lower end of the upper cone, and the lower end of the upper slip is positioned on the outer side of the upper end of the upper cone and is fixed with the upper end of the upper cone through the shear pin; a rubber sleeve assembly; the lower cone is located below the rubber sleeve assembly, and the lower cone is arranged outside the core shaft in a sleeving mode and fixed to the core shaft through a shear pin; and the lower slip device is positioned below the lower cone and comprises a lower guide ring and a lower slip. According to the novel suspension packer, the technical problem that the packing effect of an existing packer is not reliable enough can be solved.

A hanger running assembly for a wellhead includes a hanger to support a casing. The hanger running assembly also includes a seal assembly with a push ring and a seal body to support one or more seal elements. The hanger running assembly further includes a torque tool coupled to the push ring via one or more shear pins, wherein rotation of the torque tool in a first direction while the one or more shear pins are intact causes rotation of the push ring in the first direction to thread onto the hanger.

This invention discloses a connection structure for a statorless disc generator coil, including a coil flange located at the center of the coil and a speed increaser flange located at the output end of the speed increaser. At least two sector-shaped bosses are evenly distributed around the center of the speed increaser flange on the end face of the speed increaser flange. Sector-shaped grooves matching the shape, position, number, and size of the sector-shaped bosses are provided on the mating end face of the coil flange. All sector-shaped bosses are embedded in the sector-shaped grooves to form radial and tangential constraints. At least two anti-shear pin holes are also paired on the speed increaser flange and the coil flange, and anti-shear pins are fitted into the anti-shear pin holes. This solution can effectively transmit torque, reduce bolt shear force, ensure high-speed rotational stability, and enhance impact resistance.

The invention relates to the technical field of sliding block fishing spears, in particular to a spear rod telescopic type sliding block fishing spear which comprises a shell, a sliding sleeve, a pawl, a spear rod, spear teeth and a control sleeve, the elastic pawl is arranged in the shell, a protrusion is integrally arranged on the outer side of the upper end of the pawl, a groove is formed in the position, corresponding to the protrusion, in the shell, and the sliding sleeve is arranged in the upper portion of the shell. The upper portion of the sliding sleeve is connected with the shell through a shear pin, the inner side of the lower end of the pawl is in threaded connection with a spear rod, the lower end of the spear rod is located below the shell, and the outer side of the lower portion of the spear rod is sleeved with a control sleeve. The device is reasonable and compact in structure and convenient to use, by arranging the sliding sleeve, the spear rod can slide downwards through ball throwing and pressing and pin shearing, the fish fixing structure moves upwards relative to the spear rod for diameter shrinkage, fish retreating is achieved, the pipe column does not need to be rotated, fish retreating operation can be achieved through pressing, and the device can be used for a vertical well. And the device can also be applied to fallen object salvage of highly-deviated wells and horizontal wells.