6549results about "Drilling pipes" patented technology

The present invention relates to a coal mine intelligent directional drill and its drilling method, belonging to the technical field of coal mine drills. It comprises a moving platform, machine frame, clamper, main manipulator, power head, drill pipe storage system, control system, and hydraulic system. The power head structure is improved by adding an angle adjuster with accurate angle adjustment, locking, and anti-rotation functions. The angle adjuster is positioned on the gearbox side opposite the main motor, connected via a driving shaft. The control system includes a toolface azimuth detection and initialization system that works with the angle adjuster. This solves prior issues such as the absence of specialized toolface azimuth adjustment devices, low precision, low track adjustment efficiency, and challenges in achieving automatic directional drilling in the prior art. The invention enhances precision and efficiency, enabling automated, intelligent directional drilling.

The present invention belongs to the technical field of anchor protection apparatuses. Provided is an automatic anchor protection platform having combined support of anchor rods and anchor cables. The automatic anchor protection platform comprises a movable chassis, a multi-cycle anchor rod drilling rig, an anchor rod drilling rig posture positioning control device, an anchor cable support device, a temporary support device, an electrical system and a hydraulic system. Said automatic anchor protection platform integrates the multi-circle anchor rod drilling rig, the anchor cable support device and the temporary support device, and therefore meets the anchoring and support requirements of roadways under different geological conditions, allows anchor rod and anchor cable parallel support operations to be conducted at the same time, and achieves efficient coordinating matching linkage integrated design, thus further promoting efficient operation processes in limited spaces such as coal mines and tunnels.

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

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

The invention relates to an automatic drill rod loading and unloading mechanism and method, and the automatic drill rod loading and unloading mechanism comprises a crawler-type moving frame, a mast, a drill rod separating and storing mechanism, a drill rod clamping and conveying mechanism, a drill rod butt joint auxiliary guiding and locking mechanism and a controller, the mast is hinged to the right side of the crawler-type moving frame, and a drill rod hydraulic clamping device is arranged at the bottom of the mast; a power head capable of moving up and down is arranged on the mast, a lengthened main shaft is arranged on the power head, the drill rod separating and storing mechanism comprises a drill rod storing mechanism and a drill rod separating and conveying mechanism, the drill rod clamping and conveying mechanism comprises a swing driving mechanism, a swing arm and a drill rod clamping assembly, and the drill rod butt joint auxiliary guiding and locking mechanism is arranged on the power head. By means of the mechanism, automatic loading and disassembling of the drill rod can be achieved, the loading and disassembling efficiency of the drill rod can be greatly improved, meanwhile, the labor intensity of manual operation and the safety risk can be reduced, and therefore the drilling efficiency can be improved.

The invention belongs to the technical field of drilling tools, and relates to an anti-loose self-locking through cable drill rod and a locking method thereof.The drill rod comprises a drill rod body, and supporting seat mounting holes are formed in the two ends of an inner cavity of the drill rod body; the first supporting seat and the second supporting seat are arranged at the supporting seat mounting holes in the two ends of the drill rod body respectively; the first supporting seat and the second supporting seat are both of a circular ring structure, the outer ring of the circular ring structure abuts against the inner wall of the drill rod body, and the inner ring abuts against the outer ring of a through cable installed in the drill rod body. At least one of four contact surfaces, in contact with the inner wall of the drill rod body and the outer ring of the through cable, of the first supporting seat and the second supporting seat is selected as a relatively rotatable contact surface, and the other three contact surfaces are used as circumferential fixed contact surfaces; the circumferential fixed contact face is embedded into the sliding groove through the anti-rotation protrusion for circumferential locking, and the relative rotating contact face is subjected to circumferential locking through a self-locking mechanism after the through cable is installed, so that self-locking of the drill rod body and the through cable is achieved.

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

The present invention discloses a mining blasting drilling device, which comprises a frame, a drilling machine top, a positioning frame, and a slide. A retractable cabin is installed on the frame, a pulling rope is led downward from the side bottom of the retractable cabin, a retractable shaft is installed in the retractable cabin, and the retractable shaft rotates to control the length of the pulling rope led to the outside of the retractable cabin. A driving cabin is installed at the bottom of the drilling machine top, and a lifting seat is installed in the driving cabin. A positioning plate is hingedly installed at the end of the positioning frame. The lifting seat descends and pushes the positioning frame to rotate outward, so as to drive the positioning plate to move outward and fit against the inner wall of the drilled hole. The lifting drive assembly can push the slide and drill rod downward and cooperate with the rotation of the drill rod to complete downward drilling. In the present invention, the pulling rope is gradually retracted and extended, so that the drilling structure penetrates deep into the hole. The entire hole is drilled through multiple descents and drillings. The depth of the drilling is not limited by the length of the drill rod, and the drilling depth can be directly controlled by the pulling rope, thereby improving the efficiency of the entire drilling process.

The invention relates to the field of composite materials, in particular to wear-resistant paint for a drill rod, a preparation method of the wear-resistant paint, the drill rod with a surface wear-resistant coating and a preparation method of the drill rod. The preparation method of the wear-resistant coating for the drill rod comprises the following steps: S1, performing high-temperature oxidation treatment on composite powder of silicon carbide and diamond to obtain pretreated composite powder; s2, mixing the pretreated composite powder obtained in the step S1 with a silane coupling agent solution, heating and stirring, and then drying to obtain surface modified composite powder; s3, mixing epoxy resin with a toughening agent and a defoaming agent, heating, then adding the surface modified composite powder obtained in the step S2, uniformly mixing, and defoaming to obtain mixed slurry; s4, mixing the mixed slurry obtained in the step S3 with a curing agent, and defoaming to obtain the wear-resistant coating. The wear-resistant paint provided by the invention can form a coating with high wear resistance and high toughness on the surface of the drill rod.

Disclosed are small model pit launch horizontal direction drills suitable for drilling a substantially horizontal bore hole and laying pipe underground from within a surface dug pit. The devices comprise a stationary frame and a carriage component competent to move forward and back along the frame and drill and retrieve an attached drill stem through an aperture in the frame. The carriage components are configured to allow an operator to straddle the carriage and operate the device from a seated position within the frame component interior.

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

The utility model provides a double-open type safety protection door of power tongs, and relates to the technical field of petroleum drilling, the safety protection door comprises a left side protection door and a right side protection door, the left side and the right side of a tong head opening of the power tongs are respectively provided with a left side fixing frame and a right side fixing frame, and the left side fixing frame and the left side protection door are arranged in a hinged mode. The right fixing frame and the right protective door are hinged, the left protective door is connected with a left cylinder, the right protective door is connected with a right cylinder, and the left cylinder and the right cylinder are used for driving the left protective door and the right protective door to be opened and closed respectively. The double-opening type safety protection door is reasonable and simple in structure and reliable in working performance, the left side protection door, the right side protection door and the clamp frame safety door are matched to form the double-opening type safety protection door, the left side safety protection door, the right side safety protection door and the clamp frame safety door of the power clamp are opened synchronously, personal injury can be effectively prevented and reduced, and safety is improved. And the opening of the tong head is completely sealed before the tong head of the power tong starts to rotate, so that the rotating part of the power tong is comprehensively isolated from an operator.

The utility model relates to a continuous pipe, belongs to the technical field of oil and gas development, and particularly discloses a scratch-resistant and erosion-resistant flexible composite continuous pipe which comprises a central pipe, a transition layer, a reinforcing layer, a tensile layer and an outer protective layer which are sequentially arranged from inside to outside, and a wear-resistant and erosion-resistant epoxy resin inner coating is sprayed on the surface of an inner cavity of the central pipe. The outer protective layer is made of a scratch-resistant alloy steel material, so that the strength of the whole pipe is improved; the transition layer is made of nitrile rubber; the reinforcing layer and the tensile layer are formed by weaving composite material belts reinforced by special fiber belts, and a signal cable and a power cable are fixedly arranged in the reinforcing layer and the tensile layer respectively. The composite material continuous pipe can obviously improve the scratch resistance and the fluid erosion resistance of the inner wall, is beneficial to saving materials, improves the utilization rate of the existing composite material continuous pipe material, and is suitable for various oil and gas exploitation.

The invention relates to the technical field of sleeve joint structures, and discloses an oil sleeve air-tight seal buckle structure which comprises two oil sleeve bodies and a joint pipe fitting, external threads are arranged on the outer sides of the connecting ends of the two oil sleeve bodies, and internal threads matched with the external threads are arranged on the inner sides of the two ends of the joint pipe fitting. After the opposite end faces of the two oil casing bodies abut against each other, the oil casing further comprises port clamping pieces detachably arranged at the two ends of the connector pipe fitting. According to the air-tight seal buckle structure of the oil sleeve, the port clamping pieces generate fastening force when being installed at the two ends of the connector pipe fitting, the end of the oil sleeve body is further fastened, and axial relative sliding between the oil sleeve body and the connector pipe fitting is limited. In the installation process of the port clamping piece, the load sharing piece is driven to move in the radial direction of the oil sleeve body and abut against the peripheral wall of the oil sleeve body, an auxiliary supporting structure is formed between the peripheral wall of the oil sleeve body and the inner wall of the connector pipe fitting, and stress concentration of threads on the oil sleeve body and the connector pipe fitting is reduced.

The invention relates to the field of tunnel engineering, and discloses a vertical drilling and grouting all-in-one machine for micro-disturbance grouting in a subway tunnel hole and a technological method.The vertical drilling and grouting all-in-one machine comprises a base used for supporting the whole device, a sliding rail is installed on the inner wall of the base, and a supporting frame is installed at the end, close to the center line of the base, of the sliding rail; a drilling and injecting mechanism is arranged on the outer wall of the sliding rail, and a sealing assembly is arranged on the upper surface of the base. The drilling and injecting mechanism comprises a sliding frame, the sliding frame is slidably connected to the outer wall of the sliding rail, the front surface of the sliding frame is fixedly connected with a supporting plate, the lower surface of the supporting plate is rotatably connected with a drilling rod, and the lower end of the drilling rod is in threaded connection with a connector. According to the drilling and grouting device, the drilling and grouting mechanism is arranged, the hollow drill rod is adopted for drilling, during grouting operation, drilling operation can be achieved through rotation of the drill rod, then the drill rod can be directly connected with grouting equipment, and therefore grouting can be achieved through the drill rod directly.

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

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

The folding guide rail for the telescopic derrick belongs to the technical field of well drilling equipment and comprises a first guide rail beam, a connecting assembly and a second guide rail beam, a sliding groove is formed in the first guide rail beam in the length direction of the first guide rail beam, the sliding groove penetrates through one end, corresponding to a fixing base, of the first guide rail beam to form an outlet hole, and a limiting part is fixed to the position, corresponding to the outlet hole, of the sliding groove; the connecting assembly slides in the sliding groove, one end of the connecting assembly can penetrate out of the outlet hole, and the other end of the connecting assembly can make contact with the limiting part. The second guide rail beam is arranged in the length direction of the first guide rail beam, and the end away from the fixing base is hinged to the penetrating-out end of the connecting assembly. The connecting assembly is connected into the sliding groove of the first guide rail beam in a sliding mode, one end of the connecting assembly can slide out of the outlet hole, the other end of the connecting assembly can make contact with the limiting part, and then the other end, away from the fixing base, of the second guide rail beam is hinged to the penetrating-out end of the connecting assembly; and the first guide rail beam and the second guide rail beam are stacked to facilitate transportation.

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

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

The invention relates to a large-specification thick-wall high-strength feeding drill rod and a preparation method thereof.The drill rod comprises a lengthened drill rod female connector with an elevator groove, a wall thickness slip clamping section, a drill rod pipe body and a drill rod male connector, and a thickened end is arranged at the end of the drill rod pipe body; the drill rod pipe body is connected with the thick-wall slip clamping section, the drill rod male connector and the lengthened drill rod female connector with the elevator groove in a welded mode, the yield strength of the drill rod pipe body and the thick-wall slip clamping section ranges from 150 ksi to 180 ksi, and the yield strength of the drill rod male connector and the lengthened drill rod female connector with the elevator groove ranges from 135 ksi to 145 ksi. After being thickened, the two ends of the drill rod pipe body are welded to the thick-wall slip clamping section and the drill rod male connector respectively, then the lengthened drill rod female connector with the elevator groove is welded to the other end of the thick-wall slip clamping section, and finally overall quenching and tempering heat treatment are conducted. The large-specification thick-wall high-strength feeding drill rod manufactured through the method has the high tensile strength and the high elevator lifting strength capacity, and is suitable for being applied to drilling of extra-deep wells and ocean deep wells.

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

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

In an example, a tubular slip for a drill rig can include a plurality of size adjusting systems which can be radially arranged about a well access hole of the drill rig and can be configured to cooperate to adjust a diameter of a through opening of the tubular slip to accommodate various tubular sizes. The tubular slip can also include a slip component which can include a wedge arranged on a radially inner portion of each of the size adjusting systems and can be configured to cooperate to further constrict the diameter of the through opening when a drill string is suspended by the tubular slip.

The invention belongs to the field of petroleum industry, and discloses a high-torsion-resistance casing air-tight seal screwed joint structure which comprises a male end screwed joint and a female end screwed joint, and the male end screwed joint comprises male end threads, a male end inner sealing face, a male end outer sealing face, a male end inner circular bead and a male end outer circular bead. The female end screwed joint part comprises a female end thread, a female end inner sealing surface, a female end outer sealing surface, a female end inner circular bead and a female end outer circular bead; in the screwing process of the male end threaded connector and the female end threaded connector, the male end outer circular bead and the female end outer circular bead firstly make contact with each other and abut against each other, then bear torque and continue screwing, then the male end inner circular bead and the female end inner circular bead make contact with each other and abut against each other, screwing and screwing are finished, and a special thread form with high connection strength and excellent air-tight sealing capacity is formed. The over-torsion torque can be more than four times that of a common API connector, the connector is not damaged, and the air-tight sealing performance and the connecting performance can still be guaranteed.

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

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

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

The invention relates to the technical field of centralizers, in particular to a casing centralizer which comprises an annular shell, a plurality of spiral centralizing strips are evenly distributed on the peripheral face of the annular shell in the circumferential direction, and spiral grooves are formed between the adjacent spiral centralizing strips. A pre-swirling piece is arranged at the lower end part of the annular shell; rolling centralizing pieces are movably embedded in each group of spiral centralizing strips; the pre-swirling piece is used for pre-guiding fluid to form primary swirling flow, and spiral grooves between the pre-swirling piece and the spiral centralizing strips are used for jointly strengthening the main swirling flow effect, so that the cleaning efficiency of the fluid on the well wall is effectively improved, meanwhile, deposition of silt and solid particles in the spiral grooves is reduced, large particle blocks can be crushed, a flow channel is prevented from being blocked, and the continuous operation time is prolonged; the rolling centralizing piece can roll in a self-adaptive mode when making contact with the well wall, and the resistance of lowering the casing pipe is effectively reduced. And meanwhile, local high pressure of the centralizer on the well wall is avoided, the stress concentration phenomenon is effectively prevented, scraping and damage to the well wall are reduced, and the stability of a well hole can be maintained.

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.