摘要:
Examples of techniques for monitoring and controlling the pH of a drilling fluid are disclosed. In one example implementation, a system may include a first sensor to sense a first pH-value and an associated first temperature of the drilling fluid prior to being heated by a drilling fluid heater and a second sensor to sense a second pH-value and an associated second temperature of the drilling fluid subsequent to being heated by the drilling fluid heater. The system may also include a controller comprising a memory having computer readable instructions and a processing device for executing the computer readable instructions. The computer readable instructions include receiving the first pH-value and first temperature from the first sensor, receiving the second pH-value and second temperature from the second sensor, and determining an amount of additive to add to the drilling fluid to maintain a desired pH-value at the second temperature.
摘要:
A method for selecting drilling parameters for drilling a borehole penetrating the earth with a drill string. The method includes: measuring vibration-related amplitudes of the drill string during operation using one or more vibrations sensor to provide amplitude measurements; determining with a downhole processor one or more modal properties comprising one or more eigenfrequencies of the drill string using the amplitude measurements, the determination being made by including any excitation force in a white noise term of a model of the drillstring; and selecting drilling parameters that apply an excitation force at a frequency that avoids a selected range of frequencies that bound the one or more eigenfrequencies using the processor.
摘要:
Systems, devices, and methods for producing a three-dimensional visualization of a drill plan and drilling motor with a toolface are provided for drill steering purposes. A drilling motor with a toolface in communication with a sensor system is provided. A controller in communication with the sensor system is operable to generate a depiction of the drill plan and a depiction of the drilling motor, and to combine these depictions in a three-dimensional visualization of the downhole environment. This visualization is used by a user to steer the drill.
摘要:
A drill rig system for drilling a wellbore in the earth, the drill rig system comprising: a drill rig comprising: a substructure supporting a rig floor and a mast extending vertically above the rig floor; a top drive supported by a line spooled between a crown block and a travelling block, a carriage that is guided by the guide rails on the mast, wherein the carriage has at least one arm that extends/retracts to position the top drive farther/closer to the mast; a theodolite and/or laser ranging systems positioned to reflect a laser beam off a reflector associated with the top drive to determine the top drive's position relative to a well axis; and a controller of the at least one arm based on the top drive position determined by the theodolite and/or laser ranging systems.
摘要:
A downhole steering tool includes one or more steering blades selectively extendable from a housing. Each steering blade may be extended by fluid pressure within a steering cylinder. Each steering cylinder may be coupled to the interior of a mandrel positioned within the housing through an adjustable orifice. The adjustable orifice may be moved between an open and a partially open position. The adjustable orifice may be solenoid controlled or controlled by a ring valve. The adjustable orifice may generate one or more pressure pulses to transmit data to the surface.
摘要:
Systems and methods for automated planning and/or control of a drilling operation are implemented to be based at least in part on automated prediction of well performance using an analytical well performance model. Substantially real-time determination of one or more drilling parameters and/or well trajectory parameters is based on measurements received from a drill tool together with the well performance model. The described techniques thus provide for automated, analytically determined well performance measures (e.g., well productivity and/or revenue) to a geosteering process. The well performance model accounts for variations of well trajectory both in inclination and in azimuth angle.
摘要:
A method for steering a downhole tool in a wellbore includes measuring a tool face when the drill bit is off-bottom, measuring an angular position of a drill string when the drill bit is off-bottom, and measuring a torque on the drill string when the drill bit is off-bottom. The method also includes measuring the tool face when the drill bit is on-bottom and measuring the torque on the drill string when the drill bit is on-bottom. The method also includes determining a transfer function comprising the angular position of the quill, the difference between the toolface when the drill bit is on-bottom and off-bottom, and the difference between the torque when the drill bit is on-bottom and off-bottom. The angular position of the drill string is varied at the surface, based upon the transfer function, to reduce an angle between the tool face when the drill bit is on-bottom and a target tool face.
摘要:
Example embodiments presented herein are directed towards a safety system, for example a subsea workover safety system,for overriding a control module configured to actuate a component of a hydrocarbon production apparatus, particularly an apparatus comprising at least one of a lower riser package and an emergency disconnect package.
摘要:
A geophysical sensor deployment apparatus designed to provide improved coupling between the senor and the ground, includes a ram extendible through a ram guide. The guide has an opening for insertion of a geophysical sensor. The ram has a ground displacing bit at a movable end thereof. The ram and the guide are mounted to a frame. The mounting has a pivot and a plurality of angularly separated extension mechanisms disposed between the ram and guide and the frame whereby an elevation and an orientation of the ram and the guide are controllable by selective extension of each of the plurality of extension mechanisms.
摘要:
The present invention relates to a method for assigning a set of tasks to a plurality of mining and/or construction machines (200A, 200B;701-703), said machines (200A, 200B;701-703) being arranged to be driven between positions for performing tasks. The method includes: - defining a first set of constraints to be fulfilled when assigning said tasks to said plurality of mining and/or construction machines (200A, 200B;701-703); - finding an overall solution fulfilling said first set of constraints by solving each constraint as a sub-problem, a solution to at least one sub-problem being dependent on the solution of at least one other sub-problem; - said overall solution fulfilling said first set of constraints being an overall solution where a first of said sub-problems is validated by solutions of others of said sub-problems, and - assigning tasks to said plurality of machines (200A, 0B;701-703) according to the determined validated overall solution, wherein tasks of said set of tasks are arranged to 20 be carried out at least partially overlapping in time by said plurality of mining and/or construction machines (200A, 200B;701-703).