Systems facilitate forming lateral wellbores by optionally eliminating one or more trips downhole. The systems provide for forming a lateral wellbore by enabling the milling of a casing window and/or the drilling of the desired lateral wellbore to a target depth during a single trip down hole. The systems also facilitate improved downhole dynamics control and overall bottom hole assembly functionality.

A valve apparatus for in a wellbore. The apparatus may include: a housing fluidly connected to a work string, with the housing having an internal portion having a guide pin; a mandrel concentrically disposed within the internal portion of the housing, the mandrel having a piston attached at a first end of the mandrel and a mandrel cap attached at a second end of the mandrel, and wherein the mandrel contains a circulation port and a jet positioned within the piston, the jet operatively configured to receive the fluid and create a pressure drop during fluid flow through the jet; a guide bushing disposed about the mandrel, the guide bushing having a predetermined guide path contained on the guide bushing and wherein the predetermined guide path is operatively associated with the guide pin; and, a spring operatively disposed within the mandrel. A method for setting a down hole tool in a wellbore is also disclosed.

A system may include a bearing cylinder that has a bored hole for receiving a drive shaft. The bored hole can correspond to an eccentric inner diameter of the bearing cylinder. A radio frequency identification (RFID) tag may be positioned on a piston that may be slideably coupled to a housing of a bottom hole assembly. A motor may be positioned within the housing of the bottom hole assembly to rotate the bearing cylinder and position the drive shaft at a bend angle. An RFID reader may be coupled to the housing of the bottom hole assembly to detect the RFID tag in response to the RFID tag being in a detectable range of the RFID reader and to transmit information about the RFID tag to control the motor.

A steerable system comprises a fluid powered motor 10 having a rotor 16 and a stator 18, and a bias arrangement having a plurality of bias pads 34 connected to the stator 18 so as to be rotatable therewith, the bias pads 34 being moveable to allow the application of a side load to the steerable system.

A method is for establishing a new well path from an existing well, wherein the existing well, at least in a portion where the new well path is to be established, is delineated radially by a casing. The method comprises disposing and anchoring a plug base in the well; providing a plug above the plug base in the well and along a longitudinal section thereof, wherein the plug, at least in a portion thereof, covers substantially the entire cross-section of the well; removing a portion of the plug in such a manner that at least a cross-sectional section of the plug remains on the outside of the casing; disposing and anchoring a direction-guiding element in the well, and at least partially within the longitudinal section; and with the direction-guiding element, guiding a drilling tool against the inside of the casing in the existing well path in order to form a hole through the casing, and through the remaining cross-sectional section of the plug within the longitudinal section, which opens up to formation of a new well path. The method also comprises conducting a perforation tool down into the casing and to the longitudinal section where the plug is to be set; forming holes in the casing and along the longitudinal section by means of the perforation tool; and pumping a fluidized plugging material down through the string and out into the casing, thus also into the annulus via the holes in the casing.

The invention relates to a dynamic point-the-bit rotary steerable drilling tool and a measuring method thereof. The dynamic point-the-bit rotary steerable drilling tool comprises a rotary housing, a stabilized platform assembly, a hollow servo-motor assembly, a drilling fluid passage, an inner eccentric ring, an outer eccentric ring, a drilling bit shaft and a universal joint. The dynamic point-the-bit rotary steerable drilling tool also comprises a stabilized platform communication and power supply system which includes an instrument storehouse fixed at the upper end of the rotary housing, a main circuit board, an auxiliary circuit board mounted on the stabilized platform upper-end cover, an electromagnetic coupler primary-side, an electromagnetic coupler secondary winding and an electromagnetic coupler primary-side mounting plate fixed at the lower end of a coupler. The main circuit board is mounted on the electromagnetic coupler primary-side mounting plate, the electromagnetic coupler secondary winding is connected with the auxiliary circuit board, and the auxiliary circuit board is connected with the attitude sensor mounted on the side wall of the upper end of the stabilized platform body. By the dynamic point-the-bit rotary steerable drilling tool, hollow drilling fluid passage, power supply and signal transmission of the stabilized platform sensor, attitude angle parameter measurement and toolface angle real-time control of the rotary steerable drilling tool are realized.

Apparatus and method for drilling a drain hole from a well are provided. A flexible tubing used for conveying fluid to a jet bit is confined radially by a reduced-diameter tubing piece or a liner in production tubing near the diverter used to direct the flexible tubing. Concentric tubing pieces allow location of the bit in a well by measuring weight of a work string.

A directional drilling system for use in drilling a wellbore can include a bit deflection assembly with a bit axis deflection mechanism which applies a deflecting force to a shaft connected to a drill bit. The deflecting force may deflect the shaft, without being reacted between the deflection mechanism and the drill bit. The deflecting force may deflect the shaft between the drill bit and a radial bearing which maintains the shaft centered in the bit deflection assembly. The deflection mechanism may both angularly deflect and laterally displace the bit axis in the deflection mechanism.

A system includes coiled tubing connected to a bottom hole assembly, a latching tool removably connected to the completion string using a completion shear pin, configured to connect to the bottom hole assembly, having a stationary portion and a rotational portion overlayed on top of the stationary portion, wherein a first position of the latching tool comprises the rotational portion movably disposed around an outer circumferential surface of the stationary portion and a second position of the latching tool comprises the rotational portion immovably disposed around the outer circumferential surface of the stationary portion, a milling section connected to the latching tool and configured to receive weight and rotational movement from the coiled tubing to sidetrack the well when the latching tool is in the second position, and a whipstock removably connected to the milling section via a mill shear pin and having anchor slips configured to jut out into and engage with an inner circumferential surface of the well when an anchor shear pin is broken.

Provided is a milling tool, a whipstock assembly, a well system, and a method. The milling tool, in at least one aspect, includes a plurality of blades extending radially outward from a mill body, each of the plurality of blades having a primary surface and first and second side surfaces coupled to opposing sides of the primary surface, adjacent blades of the plurality of blades separated by a spacing. The milling tool may further includes a lug slot extending partially into one of the plurality of blades from the first side surface exposed by the spacing, the lug slot configured to engage with a lug of a related tool to couple the milling tool with the related tool when rotating in a first direction and to disengage from the lug of the related tool to release the milling tool from the related tool when rotating in a second opposite direction.