Abstract: Techniques for a maximum entropy approach to assigning probabilities, including those used in multiple realization history matching systems and methods, are disclosed. For example, in one embodiment, a method includes obtaining one or more available sample values Yi associated with a reservoir; computing a maximum entropy assignment ? of one or more discrete probabilities Pi(Yi) associated with each of the one or more available sample values Yi, where each discrete probability Pi(Yi) represents a probability that one or more variables Y will take a set of particular values Yi; and performing at least one determination regarding the reservoir using the maximum entropy assignment ?, including approximating a continuous probability distribution P(Y) using a sum of probability distributions Pi(Yi)+/??.

Abstract: High solids content slurry, systems and methods. The slurry comprises a carrier fluid and a solids mixture of first, second, third and fourth particle size distribution (PSD) modes wherein the first PSD mode is at least three times larger than the second PSD mode, which is larger than the third PSD mode, which is larger than the fourth PSD mode, and wherein at least one of the second and third PSD modes is less than 3 times larger than the respective third or fourth PSD mode. The method comprises forming the slurry, positioning a screen in a wellbore and circulating the slurry through the wellbore such that the solids mixture is deposited between the screen and the wellbore. The system comprises a pump to circulate the slurry, a workstring to position the screen and means for converting the slurry to a gravel pack.

Abstract: A system and methodology facilitates conveyance of a tool, e.g. a downhole completion or completion component, via a tool string. The tool string comprises a contraction joint designed to contract if the tool incurs sufficient axial loading. The contraction joint may comprise an outer housing and a mandrel slidably received in the outer housing. The contraction joint also comprises a resettable locking member which selectively releases the mandrel with respect to the outer housing to contract the contraction joint when under sufficient axial loading.

Abstract: A method of analyzing a subterranean formation may include collecting a plurality of tool responses from different tools and generating a respective theoretical equation relating tool responses for each of the tools to properties of the subterranean formation. The method may also include generating a database having the tool responses stored therein based upon each respective theoretical equation and generating a non-linear mapping function relating at least one of the tool responses to at least one property of the subterranean formation. The method may also include estimating a value for the at least one property based upon the non-linear mapping function.

Abstract: The present invention provides a coaxial cable which comprises a cable core encased in a polymeric layer, enclosing the cable core with a pair of shaped conductors; extruding a layer of polymer over the shaped conductors; and cabling armor wire layer about the layer of polymer to form the coaxial cable.

Abstract: A method of using jarring tool in a wellbore, where the jarring tool is electrically activated to apply an impact force transmitted to at least another tool in the well. The method may further comprise operating a hydraulic mechanism in response to electrical activation of the jarring tool to cause a first member of the jarring tool to be moved to collide with a second member of the jarring tool to apply the impact force. Also, the method may involve electrically activating the jarring tool by communicating at least one command over at least one electrical conductor to the jarring tool.

Abstract: A centrifugal separator for separating liquid droplets from a gas flow can be used for scrubbing gases to be emitted into the atmosphere, as well as for separating water, oil and gas condensate droplets from a gas flow in any industry. The separator comprises a cylindrical body with axial gas flow inlet and outlet pipes and separated liquid removal sections located on the end surfaces of the body. A swirler and a central perforated pipe are installed in series and in axial alignment in the body from the gas inlet side. A conical displacer is installed in the perforated central pipe. Separation stage vanes are located between the central pipe and the conical displacer along the entire length of the displacer, and hydraulic seal vanes are placed at the same level between the central pipe and the body. The separator design provides a more efficient separation of liquid droplets from a high-velocity gas flow and can operate in any position.

Abstract: A coil tubing system including a reel having a core rotatable about a horizontal axis, the core having a surface defining an interior cavity about the horizontal axis and a tubing having an inlet end positioned proximate the horizontal axis. A bend is formed in the tubing between the inlet end and a core point of the tubing positioned proximate the core surface, the permanent bend positioned substantially within the interior cavity.

Abstract: In a formation pressure tester tool, an elongated filter piston possibly having a tapered or sharp edge configured to penetrate mud cake while the probe is being set. At the end of the setting sequence, the filter piston is retracted, thus opening a flowpath from the formation, through the mudcake, to the probe.

Abstract: A degradation assembly comprises a rotary portion and a stationary portion. The rotary portion includes a cemented metal bolster bonded to a tip. The tip comprises a symmetric, substantially conically shaped tip formed of diamond and a cemented metal carbide substrate. The stationary portion comprises a holder configured to be coupled to a block mounted to a driving mechanism. A compressible element is disposed intermediate, or between, and in mechanical contact with both the rotary portion and the stationary portion.

Abstract: In one aspect of the invention, a pick assembly comprises a pick shank press fitted within a bore of a pick holder. The pick comprises a pick head opposite the shank. The shank also comprises at least one longitudinal slot extending towards the pick head along the shank from a distal end of the shank. The slot allows the shank to resiliently collapse upon insertion into the bore while still allowing the shank to maintain a press fit while within the bore.

Abstract: A drilling apparatus which includes a drill bit attachable to the drilling end of a drill string, the drill bit including a bit body being attached to a shank and having a working face with at least one cutting element. The drilling apparatus also includes a jack element positioned within a bore of the bit body having a working tip substantially protruding from the working face, and which jack element is also adapted to move with respect to the bit body. One or more position feedback sensors are positioned proximate the jack element and are adapted to detect the axial and/or angular position of the jack element with respect to the bit body.

Abstract: A method for performing an oilfield operation of an oilfield having a subterranean formation. The method includes collecting oilfield data and deploying a first plug-in including a first oilfield technology functionality into an oilfield hosting application. The method further includes performing an oilfield analysis on the collected oilfield data in the oilfield hosting application using the first oilfield technology functionality of the first plug-in to generate an oilfield output and adjusting an oilfield operation based on the oilfield output.

Abstract: A system and a method analyze fatigue damage of a bottom hole assembly (“BHA”), and more specifically, use a multi-scale approach for fatigue analysis of a BHA. Three length scales may be used in modeling of a BHA, namely the BHA scale, the component scale and the feature scale. Loading conditions for each collar/tool of the BHA may be determined, such as by use of a beam model, and may be applied to the finite element models for the collar/tool to determine the fatigue damage of each fatigue susceptible feature of each collar/tool. A cumulative fatigue damage of each critical feature may be determined, and the weakest component of the BHA may be identified. Prognostic and diagnostic implementation with well survey and drilling data may monitor fatigue damage of critical components of the BHA.

Abstract: A technique includes wirelessly communicating between a first telemetry unit and a second telemetry unit in a well completion. The communicating causes a leakage current between the first and second telemetry units. The technique includes monitoring the leakage current to detect a change in location of a formation fluid layer.

Abstract: A filter sub apparatus comprising a housing configured to contain a filter and a bypass mechanism is provided. The bypass mechanism may be actuated upon debris buildup on the filter resulting in a load applied to the bypass mechanism rising above a predetermined lower level. A method to prevent chemical injection process failures may also be provided. The method may comprise the steps of providing a filter sub prior to a check valve. The filter sub may include a filter and a bypass mechanism. Another step may be passing fluid through the filter. In addition, the steps may also include containing at least some debris on a side of the filter such that the debris is prevented from reaching the check valve. A further step may be actuating the bypass mechanism after the debris builds up to a level in which a resulting load applied to the bypass mechanism exceeds a lower limit.

Abstract: The invention is a sealing system, such as a packer, that is used in a wellbore to seal against an exterior surface, such as a casing or open wellbore. The sealing system includes a swellable material that swells from an unexpanded state to an expanded state thereby creating a seal when the swellable material comes into contact with a triggering fluid.

Abstract: A technique is provided for pumping fluid in subsea applications. A self-contained pumping module is created by mounting one or more removable pumping units on a skid that can be lowered to a sea floor. Each removable pumping unit comprises an electric submersible pumping system enclosed by an outer housing. The self-contained pumping module also comprises hydraulic connectors and electrical connectors that facilitate connection with corresponding hydraulic lines and electric lines while at a subsea location.

Abstract: A method of signal processing includes providing at least a first pressure sensor and a second pressure sensor spaced in a drilling system and using an algorithm to separate the downwardly propagating waves from the upwardly propagating waves. In one or more examples, an algorithm may include determining a velocity of pressure signals in a wellbore, time-shifting and stacking pressure signals from at least the first pressure sensor and the second pressure sensor to determine a downwardly propagating noise signal, and subtracting the downwardly propagating noise signal from at least the signal from the first pressure sensor.

Abstract: A completions assembly that includes an extendable and retractable shifting tool at a lower end of an upper completion. Outfitted with this type of tool, the upper completion may be sealably landed out at an installed lower completion without prematurely opening an isolation valve that ensures well control thereat. Rather, the full completions assembly may be finished out and the valve later opened by extending of the shifting tool from the upper completion toward the isolation valve at the lower completion. Once more, this type of well control is achieved through use of hydraulic lines that are dedicated to the upper completion even though the isolation valve is located therebelow. As a result, the extended use of hydraulic couplings and other complex or wear-prone well control architecture may be largely avoided.