Abstract: A rotary tool assembly includes a main body, a motor disposed in the main body, and a power source coupled to the main body. The power source being configured to provide electrical power to the motor. A rotary tool attached to the main body. The rotary tool configured to be actuated by the motor. A first bit storage area disposed on the main body. The first bit storage area being configured to receive a first bit. A second bit storage area disposed on the main body. The second bit storage area being configured to receive a second bit.

Abstract: A method of drilling a subsea wellbore includes drilling the subsea wellbore and, while drilling the subsea wellbore: measuring a flow rate of the drilling fluid injected into a tubular string; measuring a flow rate of returns; comparing the returns flow rate to the drilling fluid flow rate to detect a kick by a formation being drilled; and exerting backpressure on the returns using a first variable choke valve. The method further includes, in response to detecting the kick: closing a blowout preventer of a subsea pressure control assembly (PCA) against the tubular string; and diverting the flow of returns from the PCA, through a choke line having a second variable choke valve, and through the first variable choke valve.

Abstract: An isolation valve for use with a tubular string includes a tubular housing for connection with the tubular string. A closure member is disposed in the housing and movable between an open position and a closed position. A flow tube is longitudinally movable relative to the housing for opening the closure member. A piston is coupled to the flow tube for moving the flow tube, and a fluid chamber is formed between the flow tube and the housing and receiving the piston. The isolation valve having a first fluid passage for fluid communication between a first portion of the chamber and a control line for moving the piston in a first direction, and a second fluid passage for fluid communication between a second portion of the chamber and a bore of the tubular string for moving the piston in a second direction.

Abstract: A method of cementing a tubular string in a wellbore includes: deploying the tubular string into the wellbore; pumping cement slurry into the tubular string; launching a cementing plug after pumping the cement slurry; propelling the cementing plug through the tubular string, thereby pumping the cement slurry through the tubular string and into an annulus formed between the tubular string and the wellbore; and controlling flow of fluid displaced from the wellbore by the cement slurry to control pressure of the annulus.

Abstract: A method of drilling a subsea wellbore includes drilling the subsea wellbore and, while drilling the subsea wellbore: measuring a flow rate of the drilling fluid injected into a tubular string; measuring a flow rate of returns; comparing the returns flow rate to the drilling fluid flow rate to detect a kick by a formation being drilled; and exerting backpressure on the returns using a first variable choke valve. The method further includes, in response to detecting the kick: closing a blowout preventer of a subsea pressure control assembly (PCA) against the tubular string; and diverting the flow of returns from the PCA, through a choke line having a second variable choke valve, and through the first variable choke valve.

Abstract: According to one general aspect, an apparatus may include a cache pre-fetcher, and a pre-fetch scheduler. The cache pre-fetcher may be configured to predict, based at least in part upon a virtual address, data to be retrieved from a memory system. The pre-fetch scheduler may be configured to convert the virtual address of the data to a physical address of the data, and request the data from one of a plurality of levels of the memory system. The memory system may include a plurality of levels, each level of the memory system configured to store data.

Abstract: An isolation valve for use with a tubular string includes a tubular housing for connection with the tubular string; a closure member disposed in the housing and movable between an open position and a closed position; a flow tube longitudinally movable relative to the housing for opening the closure member; a piston for moving the flow tube; a fluid chamber formed between the flow tube and the housing and receiving the piston; a first fluid passage for fluid communication between a first portion of the chamber and a control line and for moving the piston in a first direction; and a second fluid passage for fluid communication between a second portion of the chamber and a bore of the tubular string and for moving the piston in a second direction. A single control line may be used to operate the isolation valve between an open position and a closed position.

Abstract: A method of cementing a tubular string in a wellbore includes: deploying the tubular string into the wellbore; pumping cement slurry into the tubular string; launching a cementing plug after pumping the cement slurry; propelling the cementing plug through the tubular string, thereby pumping the cement slurry through the tubular string and into an annulus formed between the tubular string and the wellbore; and controlling flow of fluid displaced from the wellbore by the cement slurry to control pressure of the annulus.

Abstract: Dynamically predicting a Read-After-Write (RAW) hazard by employing a variable confidence score attributed to a RAW Resynchronization Predictor (RRP) for sampling the RRP at timing periods dynamically adjusted based on the confidence score to optimize prediction of the RAW hazard.

Abstract: A computing system includes: an instruction dispatch module configured to receive an address stream; a prefetch module, coupled to the instruction dispatch module, configured to: train to concurrently detect a single-stride pattern or a multi-stride pattern from the address stream, speculatively fetch a program data based on the single-stride pattern or the multi-stride pattern, and continue to train for the single-stride pattern with a larger value for a stride count or for the multi-stride pattern.

Abstract: A method of cementing a tubular string in a wellbore includes: deploying the tubular string into the wellbore; pumping cement slurry into the tubular string; launching a cementing plug after pumping the cement slurry; propelling the cementing plug through the tubular string, thereby pumping the cement slurry through the tubular string and into an annulus formed between the tubular string and the wellbore; and controlling flow of fluid displaced from the wellbore by the cement slurry to control pressure of the annulus.

Abstract: According to one general aspect, a method may include receiving, by a pre-fetch unit, a demand to access data stored at a memory address. The method may include determining if a first portion of the memory address matches a prior defined region of memory. The method may further include determining if a second portion of the memory address matches a previously detected pre-fetched address portion. The method may also include, if the first portion of the memory address matches the prior defined region of memory, and the second portion of the memory address matches the previously detected pre-fetched address portion, confirming that a pre-fetch pattern is associated with the memory address.

Abstract: According to one general aspect, an apparatus may include a cache pre-fetcher, and a pre-fetch scheduler. The cache pre-fetcher may be configured to predict, based at least in part upon a virtual address, data to be retrieved from a memory system. The pre-fetch scheduler may be configured to convert the virtual address of the data to a physical address of the data, and request the data from one of a plurality of levels of the memory system. The memory system may include a plurality of levels, each level of the memory system configured to store data.

Abstract: Dynamically predicting a Read-After-Write (RAW) hazard by employing a variable confidence score attributed to a RAW Resynchronization Predictor (RRP) for sampling the RRP at timing periods dynamically adjusted based on the confidence score to optimize prediction of the RAW hazard.

Abstract: Methods and apparatus enable reliable and improved isolation between two portions of a bore extending through a casing string disposed in a borehole. A downhole deployment valve (DDV) may provide the isolation utilizing a valve member, such as a flapper, that is disposed in a housing of the DDV and is designed to close against a seat within the housing. The DDV includes an operating mechanism for opening/closing the DDV. In use, pressure in one portion of a well that is in fluid communication with a well surface may be bled off and open at well surface while maintaining pressure in another portion of the casing string beyond the DDV.

Abstract: A system and method have a choke in fluid communication with a rotating control device. The choke controls flow of drilling mud from the rotating control device to a gas separator during a controlled pressure drilling operation, such as managed pressure drilling (MPD) or underbalanced drilling (UBD). A probe is in fluid communication with the drilling mud between the choke and the gas separator. During operations, the probe evaluates gas in the drilling mud from the well passing from the choke to the gas separator.

Abstract: Methods and apparatus enable reliable and improved isolation between two portions of a bore extending through a casing string disposed in a borehole. A downhole deployment valve (DDV) may provide the isolation utilizing a valve member, such as a flapper, that is disposed in a housing of the DDV and is designed to close against a seat within the housing. The DDV includes an operating mechanism for opening/closing the DDV. In use, pressure in one portion of a well that is in fluid communication with a well surface may be bled off and open at well surface while maintaining pressure in another portion of the casing string beyond the DDV.

Abstract: Methods and apparatus enable reliable and improved isolation between two portions of a bore extending through a casing string disposed in a borehole. A downhole deployment valve (DDV) may provide the isolation utilizing a valve member, such as a flapper, that is disposed in a housing of the DDV and is designed to close against a seat within the housing. The DDV includes an operating mechanism for opening/closing the DDV. In use, pressure in one portion of a well that is in fluid communication with a well surface may be bled off and open at well surface while maintaining pressure in another portion of the casing string beyond the DDV.

Abstract: A method of drilling a subsea wellbore includes drilling the subsea wellbore and, while drilling the subsea wellbore: measuring a flow rate of the drilling fluid injected into a tubular string; measuring a flow rate of returns; comparing the returns flow rate to the drilling fluid flow rate to detect a kick by a formation being drilled; and exerting backpressure on the returns using a first variable choke valve. The method further includes, in response to detecting the kick: closing a blowout preventer of a subsea pressure control assembly (PCA) against the tubular string; and diverting the flow of returns from the PCA, through a choke line having a second variable choke valve, and through the first variable choke valve.

Abstract: Methods and apparatus enable reliable and improved isolation between two portions of a bore extending through a casing string disposed in a borehole. A downhole deployment valve (DDV) may provide the isolation utilizing a valve member, such as a flapper, that is disposed in a housing of the DDV and is designed to close against a seat within the housing. The DDV includes an operating mechanism for opening/closing the DDV. In use, pressure in one portion of a well that is in fluid communication with a well surface may be bled off and open at well surface while maintaining pressure in another portion of the casing string beyond the DDV.