Abstract:
A multifunction orientation system comprising a primary measuring means for measuring a drilling characteristic, at least one secondary measuring means for taking a set of orientation related measurements and a user interface means for receiving data from, and communicating data to, a user. The user operates the user interface to enter in a set of threshold values for the drilling characteristic. When the primary measuring means determines that the current measurement of the drilling characteristic exceeds one of the set of threshold values, the at least one secondary measuring means operates to take measurements as required by the set of measurements and communicate those measurements to the user.
Abstract:
The invention relates to a device for determining the depth and orientation of a feature in a wellbore, and to a corresponding method. It also relates to a downhole apparatus for performing an operation in a well comprising a device for determining the depth and orientation of a feature in a wellbore and a device for performing the operation. In an embodiment, a downhole device (42) for determining the depth and orientation of a feature (24, 26, 28) in a wellbore (12) containing a ferrous tubing (14) is disclosed, the device comprising: at least one magnetic field sensor (44) for monitoring the inherent magnetic field of the ferrous tubing so that the presence of the feature can be detected; and at least one orientation sensor (48) for determining the orientation of the device within the wellbore. An output from the at least one magnetic field sensor is correlated with an output from the at least one orientation sensor so that the orientation of the feature detected by the at least one magnetic field sensor within the wellbore can be determined.
Abstract:
An apparatus and method for a property ahead of a drill bit in a borehole penetrating a formation. The apparatus may include at least one receiver toroid disposed on a carrier and a transmitter toroid configured to induce an electromagnetic signal in the formation and disposed between the drill bit and the at least one receiver toroid. The apparatus may include at least one processor configured to estimate the property using a signal produced by the at least one receiver. The method may include estimating the property using the signal produced by the at least one receiver toroid. The method may also include one or more of: (i) generating a conductivity curve based on signals from at least one receiver toroid, (ii) validating signals from one receiver toroid based on a conductivity curve of another receiver toroid, and (iii) filtering a receiver toroid signal using lateral resistivity information.
Abstract:
An apparatus used in conjunction with a system for performing horizontal directional drilling, the system including a drill string extending from a drill rig to a boring tool such that the boring tool is steerable based on a roll orientation. The system also includes an arrangement for generating steering commands for guiding the boring tool to a target position. Responsive at least in part to the steering commands, a display is configured to selectively indicate each of a rotate command, a push command and a spin command. A steering indicator is described which indicates a current roll orientation of the boring tool. A 3-D grid can be animated and centered on either a steering or target indicator. Rounding of a steering command ratio can limit the display of target roll orientations to only those that a given boring tool transmitter is capable of sensing and indicating.
Abstract:
A system and method for steering a relief well to intersect a previously drilled wellbore. In one embodiment, a system includes a drill string disposed in the relief well and a surface processing system (138). The drill string includes a plurality of sections of wired drill pipe (16) connected end-to-end, and a bottom hole assembly (136) disposed at a downhole end of the drill string. The bottom hole assembly includes a drill bit (114), a steering tool (130) configured to direct the drill bit towards a target, and an acoustic sensing tool (132). The acoustic sensing tool includes a plurality of acoustic sensors (202A, 202B, 202C) configured to detect acoustic signals emanating from fluid (142) flow in a target wellbore. The surface processing system (138) is coupled to the uphole end of the drill string, and is configured to determine a direction to the target wellbore based on the acoustic signals detected by the acoustic sensors.
Abstract:
In one aspect, a drilling apparatus is provided, where the drilling apparatus includes a fluid pump disposed in a main wellbore, a lateral well in fluid communication with the fluid pump and a drilling assembly disposed in the lateral well, wherein the drilling assembly is configured to receive a fluid from the fluid pump to power the drilling assembly and to transport cuttings from the drilling assembly to the main wellbore. The drilling apparatus further includes a sealing mechanism disposed in the main wellbore, the sealing mechanism being configured to direct the cuttings in the fluid downhole of the sealing mechanism.
Abstract:
A method of shaping a wellbore comprising attaching a drilling apparatus to a drill string, which has a side cutting sub-assembly with both cutting and gauging surfaces; a fluid circulating sub-assembly which has nozzles directing fluid up the wellbore and past the cutting surfaces; and a bullnose assembly with forward pointing nozzles and a bullnosed front end to prevent catching in ledges of a rough drilled wellbore. The drilling apparatus is then passed through the wellbore such that the side cutting sub shears arch wellbore walls of dog legs to ease the turns and smooth the bore wall in preparation for running liner / casing or other down hole assemblies which previously may have had difficulty going in hole.
Abstract:
The present disclosure relates methods and apparatuses for testing and sampling of underground formations or reservoirs. The apparatus may include at least one extendable element configured to penetrate a formation. The at least one extendable element may include at least one drill bit with a nozzle configured to receive formation fluids. The at least one extendable element may include at least one sensor disposed on the at least one extendable element. The at least one extendable element may also include a source of stimulus for stimulating the formation. The at least one extendable element may be configured to detach and/or attach from/to a bottom hole assembly (BHA). One method may include steps for performing testing on the formation for estimating a parameter of interest of the formation. Another method may include steps for performing testing to estimate a parameter of interest of the formation fluid.
Abstract:
A directional resistivity tool (100) includes a pair of transmitters (T1,T2) deployed between at least one pair of receivers (R1,R2). Each of the transmitters and receivers (T1,T2; R1,R2) preferably includes collocated z-mode and x-mode antennae (122,124; 132,134; 142,144). Exemplary embodiments may further include additional receivers (R3,R4,R5,R6), for example, additional pairs of receivers deployed axially about the transmitters or one or more deep reading receivers (R3,R4,R5) deployed on one axial end of the transmitters (T1,T2). Tools (100) in accordance with the invention enable directional resistivity measurements to be acquired at multiple depths of investigation using fewer transmitter firings than conventional tools (50).