71results about "Borehole drives" patented technology

A first aspect relates to a downhole apparatus comprising an anchor 113 having a gripping element for engaging a borehole 104 to restrict relative axial and / or rotational movement between the anchor a

This invention discloses a novel combined microwave-drilling device for hard rock, belonging to the field of rock breaking technology. It includes a ground control system and a microwave generator. One end of the ground control system is connected to the microwave generator; a power box is connected to the bottom of the microwave generator, and a rock-breaking motor is installed inside the power box. The drilling tool of this invention consists of a pre-drilling small drill bit and a reaming large drill bit. The pre-drilling small drill bit acts as a pilot tool, drilling a guide hole on the rock surface through high-speed rotation. Simultaneously, it utilizes the local high stress concentration effect of its cutting edge to pre-damage the rock mass surrounding the hole wall, forming a micro-crack network, significantly reducing the integrity and strength of the rock mass. The reaming large drill bit efficiently enlarges the drilling cross-section of the weakened rock mass. Through the synergistic effect of mechanical fracturing and microwave thermal assistance, the drilling cross-section is rapidly enlarged, while reducing energy loss and tool wear during pure mechanical drilling.

The application discloses a kind of downhole filling hole fast construction method, it is related to mining exploitation technical field, and its technical scheme main point is: the construction method includes equipment preparation and installation, installation wellhead device, pneumatic down-the-hole hammer percussion drilling, borehole inclinometry, down filling pipe and well cementation etc. steps.Compared with prior art, mainly corresponding adjustment is made to equipment preparation and installation, installation import device, pneumatic down-the-hole hammer percussion drilling three steps, solve the problem of large equipment size, disintegration difference, improve the efficiency of drilling rock, solve the problem of dust flying, realize from surface to downhole any middle section construction through construction filling hole, realize environmental protection construction, realize the green, cycle and sustainable development of mine.

The application discloses a down-the-hole hammer, which comprises an outer cylinder, a joint assembly connected to the rear end of the outer cylinder, a drill bit assembly connected to the front end of the outer cylinder, an inner cylinder fixedly sleeved in the outer cylinder, a piston sleeved in the inner cylinder, a gas distribution rod sleeved in the inner cylinder and connected to the joint assembly, a gas distribution valve sleeved on the outer side of the gas distribution rod, the gas distribution valve separating a rear chamber into a first chamber and a second chamber, an isolation surface arranged on the inner surface of the inner cylinder and used in cooperation with the gas distribution valve, and the gas distribution valve having an axial pressure difference at both ends, so that the gas distribution valve has a first state and a second state, when the gas distribution valve is in the first state, the gas distribution valve is attached to the isolation surface, and when the gas distribution valve is in the second state, a gap exists between the gas distribution valve and the isolation surface. Compared with the prior art, the down-the-hole hammer provided by the application has small gas pressure loss, can improve the output power of the hammer, and prolongs the service life of the hammer.

The application provides a controllable rotary screw drill tool, which comprises a shell, a power spindle concentrically arranged in the shell and capable of rotating relative to the shell, the power spindle being provided with a first central flow channel, and a spline groove extending along an axial part being arranged on an inner wall of a lower end of the power spindle; an output spindle for connecting a drill bit, the output spindle being arranged at a lower end of the power spindle and provided with a second central flow channel, and a spline capable of being matched with the spline groove being arranged on an outer wall of an upper end of the output spindle; wherein in a first state, the controllable rotary screw drill tool can be lifted off a bottom of a well, so that the output spindle is separated from the power spindle, and thus a power motor is separated from the drill bit to perform directional measurement; in a second state, the output spindle and the power spindle can be connected through the spline and the spline groove to form a connection, so that the power motor drives the drill bit to rotate, and thus drilling operation can be directly performed after directional measurement without drilling.

This invention discloses a nitrogen-driven pneumatic directional drilling equipment for downhole cuttings removal in soft coal seams, comprising a nitrogen drive mechanism and a directional drilling rig. The directional drilling rig has a directional drill string assembly structure, which includes a drill rod. A probe outer tube is coaxially sleeved inside the drill rod, and a measuring probe is coaxially sleeved inside the probe outer tube. The measuring probe is used to measure the gas flow rate and pressure in the borehole. An annular downward air chamber for nitrogen gas flow is formed between the inner wall of the probe outer tube and the outer wall of the measuring probe. An air inlet is opened on the outer wall of the drill rod at the lower part, and an annular upward air chamber for nitrogen gas flow is formed between the inner wall of the drill rod above the air inlet and the outer wall of the probe outer tube. A trumpet-shaped wind shield, wider at the bottom and narrower at the top, is connected to the outer wall of the drill rod above the air inlet. This invention also discloses a corresponding borehole cuttings removal method. This invention significantly reduces the resistance to airflow, achieving faster drilling speeds and removing more cuttings under the same air volume and pressure.

A circumferential cutting hammer with core sampling function and its drilling method are disclosed. The circumferential cutting hammer includes a drilling device and a core sampling device. The drilling device includes a drilling cylinder with a core breaking mechanism and a core sampling device inside. After the pile hole drilling is completed, the core breaking mechanism on the drilling device can break the rock core, and the core sampling device can be used to retrieve the rock core. The rock core can be broken without the need for other tools or equipment, and the core sampling device can be used to clamp and retrieve the broken rock core. The entire pile hole can be constructed in one drilling operation, which simplifies the pile hole construction process, significantly shortens the construction time, ensures the construction efficiency of the pile hole, and improves the construction speed of the pile hole.

This utility model discloses a reducer device for emulsion drilling rigs, including a first mounting shell, a second mounting shell disposed on the first mounting shell, and fixing bolts disposed between the first and second mounting shells. It enables rapid fixing and disassembly of the reducer body without disassembling numerous related components, significantly simplifying the replacement process, shortening downtime, and reducing the impact on construction progress. In terms of maintenance, the ease of assembly and disassembly reduces reliance on confined operating spaces and the risk of secondary damage due to improper operation. Regarding costs, it reduces labor hours and labor costs; reduces wear and tear on surrounding components from repeated disassembly, lowering the probability of unplanned replacements; and eliminates the need to stock complete units, reducing inventory costs. Furthermore, the flexible fixing method facilitates adaptation to equipment upgrade needs without requiring modification or replacement of the entire machine, further reducing costs, making it particularly suitable for scenarios such as underground mining.

The invention relates to a method and system for installing a load-bearing element in a seabed, a method and system for installing a subsea anchor on a seabed, a subsea pile and a subsea anchor.

The application discloses a rotary force torque increasing device, relates to the field of drilling tool torque increasing technology, and comprises a shell, a main shaft is arranged in the shell, an impact cylinder is arranged on the outer side of the main shaft, a torsion ring is arranged at the connecting position of the main shaft and the impact cylinder, a baffle ring is arranged below the main shaft, an upper energy storage impact piece is arranged on the top of the impact cylinder, a pressing ring is arranged on the bottom of the impact cylinder, a limiting bearing is arranged between the baffle ring and the pressing ring, a limiting bearing is also arranged on the top of the upper energy storage impact piece, a locking sleeve is arranged at the bottom of the shell, a lower energy storage impact piece is arranged between the locking sleeve and the baffle ring, a lower connector is arranged at the bottom of the main shaft, the lower connector extends out of the locking sleeve, and the lower connector is connected with a drill bit.

Provided herein are various embodiments of a downhole motor milling assembly having a tubular string, a flow-by anchor positioned on the tubular string, a stroking device positioned on the tubular string and downhole from the flow-by anchor, a downhole motor positioned on the tubular string and downhole from the stroking device, and a milling assembly positioned on an end of the tubular string. Further milling assemblies provide where the flow-by anchor temporarily attaches to a casing while permitting mud to flow past the flow-by anchor.

A closing member assembly for a check valve comprising a closing member (1) is disclosed. The closing member has a head portion (2) for engaging against a valve seat (8), and a stem portion (3) protruding from the head potion (2). The closing member (1) further defines a bypass duct (4) extending between a first position (4a) on an outer surface 5 of the closure member and an internal space (3a) of the stem portion (3), and the closing member assembly further comprises a choke member (5) for restricting flow through the bypass duct (4). A check valve and a DTH (down-the-hole) are also disclosed.

The application discloses a self-rotating pneumatic down-the-hole hammer, which comprises an outer shell, a gas distribution base, an inner cylinder, a piston, a driving key, a bushing, a rotating sleeve and a drill bit, wherein the outer shell is sleeved outside the gas distribution base and the inner cylinder, the first gas channel is arranged in the gas distribution base, the spline is arranged between the outer shell and the gas distribution base, the spline can fix the gas distribution base and prevent the gas distribution base from rotating, the gas distribution base and the inner cylinder are overlapped, the second gas channel is formed between the gas distribution base, the inner cylinder and the outer shell, the piston is coaxially arranged in the inner cylinder, the piston central passage and the gas distribution rod coaxially arranged at the lower center part of the gas distribution base are coaxially arranged, the anti-rotation column connected to the bottom of the gas distribution rod is provided with the spline groove matched with the spline in the piston central passage, and the anti-rotation column is clamped. The application has the beneficial effects that the carrying capacity is high, and the application is not prone to wear. The driving key can be switched between different groove positions in the rotating sleeve. The tooth tip impact damage is effectively avoided, and the service life and the working stability of the rotating mechanism are significantly improved.

This invention relates to the field of downhole operation technology and is a multi-directional rock-breaking vibration device. It includes an exciter outer cylinder, a drive unit, an eccentric wheel, a drill bit shaft, a piston liner, and a counterweight. The drive unit, eccentric wheel, and drill bit shaft are sequentially and sequentially mounted from top to bottom inside the exciter outer cylinder. The output end of the drive unit is connected to the upper end of the eccentric wheel, and the lower end of the eccentric wheel is connected to the upper end of the drill bit shaft. The lower end of the drill bit shaft is located below the exciter outer cylinder. This invention has a reasonable and compact structure and is easy to use. The drive unit drives the eccentric wheel to rotate, generating circumferential vibration. During the rotation of the eccentric wheel, static friction is converted into dynamic friction, causing circumferential vibration of the drill bit shaft. This vibration of the drill bit shaft causes the drill bit to generate circumferential impact. The counterweight and eccentric wheel respectively achieve axial and circumferential impact, completing multi-dimensional impact and assisting the drill bit in rock breaking. It features stability, reliability, and good impact effect.

This hydraulic sliding wrench for percussion drills eliminates the dangerous manual wrench work, prevents the inner rod from falling even during upward drilling, and avoids the need for a complex clamping structure. [Solution] The slide spanner 1 is attached to the main body 140 of the percussion drill 100 and clamps the inner rod 7 of the double-tube rod 2 used for drilling. The device includes a rod spanner 10 that grips the notch 7a of the inner rod 7 to perform clamping, a mounting means for attaching the rod spanner 10 to the main body 140, and a hydraulic drive means for reciprocating the rod spanner 10 in the gripping direction.

This invention discloses an adaptive formation frequency-modulated hydraulic oscillation impact method and system, relating to the field of oil drilling technology. The method includes the following steps: S1, collecting and analyzing data from existing wells in the same block to obtain the optimal impact frequency for each formation in the well to be drilled; S2, converting the optimal impact frequency into mud pulse signals and transmitting them to the downhole impact tool; S3, receiving the mud pulse signals during hydraulic oscillation impact of the downhole impact tool, determining the error between the expected and actual frequency values, analyzing the number of baffles to be controlled, and controlling the expansion and contraction of the baffles in the baffle cavity according to the number of baffles to reduce or increase the volume of the fluid cavity, thereby adjusting the impact frequency of the downhole impact tool. This invention adjusts the impact frequency of the downhole impact tool in real time, enabling the drill bit to achieve optimal rock-breaking effect, improving rock-breaking efficiency, increasing the overall mechanical drilling speed of the drill bit, increasing drill bit lifespan, reducing the number of drilling trips, and reducing drilling costs.

The utility model relates to the field of drilling, specifically is a kind of ore drilling device, including two supports, beam is installed on the support, second air cylinder is connected with moving plate, buffer assembly is installed on the moving plate, connecting plate is installed on the buffer assembly, servo motor is provided on the connecting plate, the output end of the servo motor is connected with drill bit, when the drill bit is drilled into resistance, buffer assembly contracts.Connecting plate moves downward and drives servo motor to move downward synchronously, servo motor drives drill bit to rotate, drill bit contacts ore and is subjected to downward pressure, under the action of second air cylinder, drill bit is always subjected to downward pressure, drill bit will continue to drill into, to prevent drill bit damage, buffer assembly contracts now, servo motor and drill bit move upward along with connecting plate, avoid drill bit to continue to be subjected to pressure and drill into ore interior and appear damage, with the effect of good protection drilling drill bit.

This utility model discloses a rock drill and its shank buffer device. The shank buffer device includes a buffer assembly, an oil inlet assembly, and an oil return assembly. The buffer assembly is sleeved on the outer periphery of the impact piston. A first end of the buffer assembly abuts against the shank, and a second end of the buffer assembly forms a buffer cavity with the rock drill housing. The oil inlet assembly is connected to the end of the buffer cavity furthest from the buffer assembly, and the oil return assembly is connected to the end of the buffer cavity closest to the buffer assembly. The oil inlet assembly includes an oil inlet pipe and a buffer pipe arranged in parallel. A one-way valve is provided on the oil inlet pipe along the oil inlet direction, and a throttle valve is provided on the buffer pipe. The buffer assembly is used to be driven to move axially and block the oil return assembly when the shank rebounds due to a rebound force. The shank buffer device provided by this utility model has a simple and efficient buffer structure, eliminates the need for complex oil inlet and return pipes, reduces the design and manufacturing difficulty of the hydraulic system, and offers high reliability and durability.

A downhole tool for use in a subterranean well can include an electric motor, a motor carrier, and a compressed gas chamber. The motor may be axially reciprocably received in the motor carrier. The compressed gas chamber may decrease in volume in response to displacement of the motor in an axial direction relative to the motor carrier. The chamber may be formed radially between the motor and the motor carrier.

Apparatus including a bottom hole assembly (BHA) with a drill bit 108, and a downhole anchor 113 having a gripping element for engaging the borehole to control relative movement and load transfer bet

The embodiments disclosed herein relate to a flow pulse system including a rotor, a stator, an ejector configured for releasable coupling to the rotor, and a nozzle releasablely coupled to the rotor, the nozzle being configured to control fluid flow through the rotor. In some embodiments, the system uses a screen disposed therein, the screen including an inner aperture in fluid communication with a plurality of lobe-shaped cavities along the rotor. In some embodiments, the system uses a fixed valve and an oscillating valve having a plurality of oscillating valve ports in fluid communication with the plurality of lobe-shaped cavities.

The invention relates to a pressurized liquid driven downhole drilling machine (1) with a soft start from flush position, wherein a drive surface of an impact piston (20) is alternately pressurized and pressure relieved, depending on the position of a valve slide (6) in a valve housing (4). A slide control interface (17) includes a pressure relief port (E) so that a pressure relief channel (40) is opened in the flush position between a drive chamber (30) for the impact piston and a slide control channel (4c). This allows the impact piston (20) to be partly retracted from the flush position by diverting a pressure flow from the drive chamber (30) to a control pressure surface (A2) of the valve slide (6) thereby triggering the valve slide to move from a holding position until the impact piston has moved to a balance point at which the pressure relief port (E) is closed.

A pack system for a downhole assembly is provided. One end of the pack system is connected to a drill bit for drilling a wellbore, the other end of the pack system interfaces with a motor to receive torque. The pack system described herein has a simple design that reduces the number of parts, eliminates some seals and shims, and relies on a portion of drilling mud for lubrication. As a result, wear on parts of the system is greatly reduced and the longevity of the system is greatly increased. The hardness of various components of the system in key areas is increased, for example, with carbide, to further reduce wear and increase longevity. In addition, the simpler, more balanced arrangement of components allows for reduced vibration and high rotational speeds, which improves the performance of the overall downhole assembly.

A hydraulic thruster system for providing an axial force. In one embodiment, the system comprises a pump, a motor for driving the pump, and a hydraulic thruster comprising: a cylinder comprising a plu

The application discloses a turbine drilling wellhead testing monitoring system and belongs to the technical field of turbine drilling tools. The system comprises a testing monitoring device installed between a conventional drill pipe and a turbine drilling tool, the upper and lower ends of the shell of the device are connected with the conventional drill pipe and the turbine drilling tool respectively, a lower bevel gear seat is fixed to the inner side of the shell, a lower bevel gear is rotatably installed on the lower bevel gear seat, the gear shaft of the lower bevel gear is connected with a compression nut at the upper end of the turbine drilling tool, the rotation of the rotor blade drives the rotation of the lower bevel gear, a rotating speed output bevel gear is rotatably installed on the side wall of the shell, the gear part of the rotating speed output bevel gear is engaged with the lower bevel gear, the gear shaft penetrates through the shell and is connected with an encoder, so that the rotating speed of the rotor is guided out and is monitored in real time. The application realizes the on-line quantitative measurement of the rotating speed of the turbine drilling tool, replaces the traditional fuzzy judgment of artificial hand touch sensing, and significantly improves the accuracy, safety and intelligent level of the wellhead testing.

The utility model discloses a screw motor for downhole, including motor body, the output fixedly connected with the pivot of motor body, the inside installation of pivot has screw body, the one end of screw body is installed the drill bit, the outer surface of motor body is fixedly connected with the flange through the bolt, the outer surface fixedly connected with the sleeve of flange, the inboard surface fixedly connected with the grinding section of sleeve. This screw motor for downhole, through the setting of screw body, drill bit, sleeve and grinding section, drill bit is used for downhole operation, and it is convenient to break up the big boulder in mortar, prevents the backflow gap between the stator and rotor in motor body from being blocked by big boulder, realizes secondary breakage through the grinding gap between grinding section and screw body, avoids the influence of the screw motor of the debris, thereby guarantees the smooth operation, and further improves work efficiency, prolongs the service life of equipment.

This invention discloses a clustered directional down-the-hole hammer drill bit for drilling large-diameter rescue wells. Further, it includes: a mounting body, multiple down-the-hole hammer units, multiple linear drive mechanisms, a monitoring mechanism, and a numerical control system. Each down-the-hole hammer unit is slidably mounted on the mounting body. The multiple down-the-hole hammer units are distributed circumferentially at intervals along the mounting body. Each linear drive mechanism is disposed on the mounting body. The output end of each linear drive mechanism drives and connects to its corresponding down-the-hole hammer unit. The monitoring mechanism is disposed on the mounting body, with its detection end facing the ground surface. The monitoring mechanism is used to detect the ground environment. The numerical control system is disposed on the mounting body, and its signals are connected to each linear drive mechanism and the monitoring mechanism. The numerical control system is used to control the operation of each linear drive mechanism based on the detection data from the monitoring mechanism, so as to adjust the working mode of each down-the-hole hammer unit according to the ground environment.

A drillstring anchor for reacting torque from a drillstring to a wellbore, the drillstring anchor comprising: a channel for receiving a downhole portion of a drillstring so as to be rotationally engaged therewith; multiple segments disposed along the drillstring anchor, each segment comprising a respective gripper and a respective actuator capable of being driven to cause the respective gripper to adopt at least one of (a) a first state in which it is urged outwardly for gripping the wellbore and (b) a second, passive state, the gripper of at least one segment being actuable independently of the gripper of at least one other segment; the multiple segments comprising a first segment and a second segment coupled to each other so as to permit relative longitudinal motion therebetween.