15 results about "Mud motor" patented technology

A downhole mud motor includes a driveshaft rotatably disposed in a driveshaft housing, a bearing mandrel coupled to the driveshaft, wherein the bend adjustment assembly includes a first configuration that provides a first deflection angle between the driveshaft housing and the bearing mandrel, wherein the bend adjustment assembly includes a second configuration that provides a second deflection angle between the driveshaft housing and the bearing mandrel, and a locking assembly including a locked configuration configured to lock the bend adjustment assembly into one of the first configuration and the second configuration until the downhole mud motor has at least one of reached a predefined depth in the wellbore, and a mud weight has reached a predefined mud weight threshold at a given depth, in response to which the locking assembly is configured to actuate from the locked configuration to an unlocked configuration.

A downhole motor for directional drilling includes a driveshaft assembly including a driveshaft housing and a driveshaft rotatably disposed within the driveshaft housing, a bearing assembly including a bearing housing and a bearing mandrel rotatably disposed within the bearing housing, wherein the bearing mandrel is configured to couple with a drill bit, a bend adjustment assembly configured to adjust a bend setting of the downhole motor, and an electronics package coupled to the driveshaft assembly, wherein the electronics package is configured to receive data from sensors of the downhole motor.

Systems and methods presented herein relate to forming a composite reinforcement lining. A system includes a compression molded elastomer reinforcement composite having a first layer, a second layer, and an intervening layer disposed between the first layer and the second layer. The first layer includes one or more first elastomer materials. The second layer includes one or more second elastomer materials. The intervening layer includes one or more composite reinforcement materials having a hardness greater than the one or more first elastomer materials and the one or more second elastomer materials.

This invention discloses an integrated logging-while-drilling (LOD) and measurement drill string assembly, relating to the field of oil and gas drilling engineering technology. It provides a series connection scheme for core protective drill string components, offering two switchable configurations: one with a mud motor and one without. Both configurations consist of an azimuth density neutron logging sub, a bidirectional communication power supply sub, an acoustic logging sub, a resistivity logging sub, an upper connecting sub, a flexible sub, a lower connecting sub, an azimuth gamma logging sub, and a steering actuator connected in series according to a fixed logic. The configuration with a mud motor only requires adding a mud motor at a designated location to complete the structural switch, without changing the series connection of the remaining subs. This assembly scheme is applicable to various drilling scenarios such as offshore exploration and development, deepwater drilling, complex directional wells, highly deviated wells, and horizontal wells. It enables integrated operations of geological steering, formation evaluation, and wellbore stability analysis during drilling, effectively improving drilling efficiency and reducing operational risks.

A method that may comprise disposing a bottom hole assembly into a formation, wherein the bottom hole assembly comprises a mud motor, identifying a first segmented data set for a slide mode of the mud motor, and identifying a second segmented data set for a rotate mode of the mud motor. The method may further comprise calibrating the mud motor at least in part using a Reversible Jump Markov Chain Monte Carlo (RJMCMC), wherein the RJMCMC uses at least in part the first segmented data set and the second segmented data set.

A system and method for stall recovery of mud motors may be implemented in a steering control system. The stall recovery system and method may involve automatic detection of a stall of a mud motor during drilling controlled by the steering control system, and may respond to the stall in a rapid and controlled manner to avoid or minimize damage to the mud motor, such as by immediately reducing mud pressure and stopping rotary drilling, if used, faster than a typical human operator could perform. The stall recovery system and method may further take actions to automatically restart drilling.

A method can include receiving a maximum depth of cut value for a drill bit that accounts for a bit body forming junction; receiving a total rotational rate value for the drill bit based at least in part on a differential pressure value for a mud motor; generating a rate of penetration value for the drill bit operatively coupled to the mud motor by multiplying the maximum depth of cut value and the total rotational rate value; and operating a wellsite system in accordance with the rate of penetration value to drill a portion of a borehole with the drill bit operatively coupled to the mud motor.

A method and a system for detecting a motor stall includes obtaining, in real time, actual or calculated values of sensors comprising at least one of a top drive torque value, a differential pressure value, a surface weight on bit value, or a top drive rotational velocity value and computing a spline representation of the sensor values or derivatives of the sensor values to obtain a spline data set. Further, the method includes determining a presence of the motor stall using the spline data set.

The utility model discloses an anti-mud motor sealing structure, which relates to the technical field of motors and comprises an end cover, a motor shaft and a cover plate, the motor shaft penetrates through the center of the end cover and is in running fit with the end cover, the cover plate is fixedly connected to the outer side of the end cover, a framework oil seal is fixedly arranged on the inner circumferential wall of the cover plate, and the framework oil seal is tightly abutted against the motor shaft; a waterproof cover is fixedly arranged on the motor shaft, the outer edge of the waterproof cover extends to the outer wall of the cover plate, and the waterproof cover does not make contact with the cover plate. According to the scheme, the first sealing cavity and the second sealing cavity are arranged from outside to inside, two sealing structures are formed, and a large amount of slurry is prevented from entering; by injecting grease into the accommodating cavity between the axial surface oil seal and the framework oil seal, the service life of the axial surface oil seal and the framework oil seal can be prolonged, and residual silt in the second sealing cavity can be prevented from entering the position of the framework oil seal, so that external mud is prevented from entering the motor, and the sealing effect is ensured.

Detecting a mud motor stall, using one or more computer processors, includes: receiving differential pressure data indicative of differential pressure measured over time during drilling of a wellbore; identifying, within the differential pressure data, one or more differential pressure peaks; for at least a first peak of the one or more differential pressure peaks, identifying one or more features of the first peak; and determining, based on each of the one or more features, that the first peak is indicative of a mud motor stall. Identifying the one of more features may include identifying at least a first feature including: determining an amplitude of the first peak; determining an amplitude of at least a second peak of the one or more differential pressure peaks; and comparing the amplitude of the first peak to the amplitude of the second peak.

This invention discloses a multi-adaptive rotary steerable logging-while-drilling (LSD) assembly, belonging to the field of oil drilling technology. This assembly uses a traditional steerable actuator as its core, forming multiple integrated solutions compatible with existing logging instruments, dual-master control architectures, Russian platforms, rotary steerable systems, and next-generation integrated systems. It is compatible with both drilling conditions with and without mud motors. Component cascading is achieved through flexible subs, conversion subs, upper and lower communication subs, and extension connection components of existing logging instruments. This effectively improves the problems of poor compatibility, low integration, measurement lag, insufficient communication stability under complex conditions, and weak compatibility of existing drilling assemblies. This invention has the advantages of multi-platform compatibility, near-bit synchronous measurement, bidirectional stable communication, and integrated geological guidance, and is suitable for drilling and formation evaluation operations in directional wells, horizontal wells, and extended reach wells.

In general, in one aspect, embodiments relate to a downhole tool assembly, that includes a rotary mechanism, a pulsing mechanism, that includes a rotary disc in mechanical communication with the rotary mechanism, where a window of the rotary disc periodically aligns with a corresponding window of the downhole tool assembly to generate a pressure pulse based on a periodicity of the rotary mechanism, and a discharge port configured to discharge fluid as the fluid is being pulsed by the pulsing mechanism.

Techniques for controlling a trajectory of a mud motor directional drill. A system receives one or more inputs pertaining to constraints for a wellbore in a mud motor drilling operation. The system constructs, as a function of the one or more inputs, a discretized well depth horizon. One or more binary slide and rotate commands for controlling a directional drill within the wellbore is generated based on an analysis of the discretized well depth horizon. The system controls the directional drill according to the one or more binary slide and rotate commands.

An integrated downhole apparatus and method for the efficient clean-out of sand, soft cement, and mud sediments in vertical, deviated, and horizontal oil and gas wellbores. The tool assembly comprises a single-nozzle jet pump coupled with a cup-type packer and a detachable distal drill bit, configured for deployment via hoist systems or coiled tubing at depths up to 4000 meters, The cup packer (rubber or polyurethane, single or dual configuration, 44 / 3- to 98 / 5- inch casing) allows independent rotation of the drill bit without rotating the tubing string via an internal spring mechanism (weight-on-bit) or optional hydraulic mud motor. Surface-pumped water drives the jet pump nozzle creating a pressure differential while the rotating bit agitates and breaks down compacted sediments. The cup packer isolates the target interval, directing power fluid through the jet pump to entrain dislodged debris and lift the slurry to surface in a single trip.

The invention provides a complex multi-phase flow fluid circulation experiment device and an application method thereof, relates to the technical field of petroleum drilling downhole testing, and solves the problems that in an existing experiment, drilling fluid outlet flow needs to be tested on site, time and labor are wasted, and the measurement accuracy is low. A drilling fluid tank and a water tank of the device are respectively connected with a middle pipeline through inlet and outlet pipelines to form a circulating pipeline; the middle pipeline is connected with a flow meter; the middle pipeline is formed by connecting a horizontal pipeline, a vertical pipeline and a 45-degree inclined pipeline, and is used for realizing measurement of drilling fluid in different flowing states through the flowmeter; the experimental method comprises the following steps: when a single-phase flow test is performed, starting a slurry motor pump and a water tank to realize device circulation; when gas-liquid two-phase flow is carried out, the air compressor is started; when gas-liquid-solid three-phase flow is conducted, the drilling fluid box and the stirrer need to be started. The device can realize simulation of single-phase flow, two-phase flow and three-phase flow, and can realize accurate measurement of various flowmeter performances in laboratories.