Abstract:
A quench system for a refrigeration cycle of a liquefied natural gas (LNG) facility includes at least one compressor for compressing a refrigerant that cools a natural gas stream. Also included is a quench fluid supply structure containing a quench fluid. Further included is a cooler vessel and a quench fluid line extending from the quench fluid supply structure and through the cooler vessel for cooling therein, the quench fluid maintained in a liquid state through the entirety of the quench fluid line. Yet further included is a quench control valve disposed downstream of the cooler vessel to control a flow rate of the quench fluid routed therein. Also included is a refrigerant suction drum located downstream of the quench control valve and configured to receive the quench fluid from the quench fluid line, the refrigerant suction drum in fluid communication with at least one component for cooling.
Abstract:
The invention is directed to stable and labile crosslinked water swellable polymeric microparticles that can be further gelled, methods for making same, and their various uses in the hygiene and medical arts, gel electrophoresis, packaging, agriculture, the cable industry, information technology, in the food industry, papermaking, use as flocculation aids, and the like. More particularly, the invention relates to a composition comprising expandable polymeric microparticles having labile crosslinkers and stable crosslinkers, said microparticle mixed with a fluid and an unreacted tertiary crosslinker comprising PEI or other polyamine based tertiary crosslinker that is capable of further crosslinking the microparticle on degradation of the labile crosslinker and swelling of the particle, so as to form a stable gel. A particularly important use is as an injection fluid in petroleum production, where the expandable polymeric microparticles are injected into a well and when the heat and/or pH of the well cause degradation of the labile crosslinker and when the microparticle expands, the tertiary crosslinker crosslinks the polymer to form a stable gel, thus diverting water to lower permeability regions and improving oil recovery.
Abstract:
The invention relates to a system and method for well abandonment, comprising installing a first steel plate comprising a hole having a pipe section attached above the hole, wherein a coupler may be installed to house a stopper which is then positioned below the surface casing having a second steel plate, the capping plate, affixed to the top of the surface casing. The stopper system then acts to prevent the exchange of wellbore fluid into the environment while allowing for proper venting of casing strings by pressure actuating the stopper system against the cap. The coupler further provides for attachment of various gas sampling or other monitoring equipment in for purposes of detection of leaks or other analytical objectives.
Abstract:
A system recovers hydrocarbons from an unconventional reservoir using a number of sidetrack lateral wells. In addition, methods related to drilling the disclosed well system provide recovery of the hydrocarbons.
Abstract:
A method of determining availability and reliability of facility equipment. The method includes monitoring an operational status of a piece of equipment of a facility. The method also includes outputting a visual display illustrating the operational status of the equipment, wherein the operational status is categorized into a plurality of categories, at least one of the plurality of categories requiring an operator to classify an interruption of function of the equipment as one of a planned outage, a forced outage, and a standby mode. The method further includes calculating a reliability percentage of the equipment based on a total amount of time classified as the forced outage. The method yet further includes calculating an availability percentage of the equipment based on a total amount of time classified as the forced outage and the planned outage.
Abstract:
Systems and methods for generating seismic signal include using a conventional airgun array and specifically detunes the timing of the array so individual airguns are not fired at the same time and with their interacting bubbles form a unique composite pulse that can be separated by various means out of a seismic record to form the shotpoint. The advantage of this approach is a lower overall noise envelope in the water minimizing impact on the marine mammals and it allows multiple arrays to be fired in close spatial and timing proximity with minimal to no interference.
Abstract:
An embodiment of a method of assessing characteristics of a proposed offshore structure design includes: receiving input data from a user via a user interface, the input data including characteristics of a proposed design of an offshore structure; estimating, by a processor, a weight of the offshore structure and expected forces on the structure based on the input data; calculating allowable stresses and stability of the offshore structure based on the estimated weight and expected forces; estimating a cost of fabrication of the offshore structure based on the input data; estimating a cost of transportation and installation of the offshore structure based on the input data; calculating a total estimated cost of the offshore structure based on the cost of fabrication and the cost of transportation and assembly; and outputting the estimated weight, expected forces and total cost to the user via a display.
Abstract:
Method for characterizing a subterranean formation includes: obtaining azimuth-dependent observed travel-times from measured seismic data; inverting observed travel-times to calculate a fracture attribute selected from the group consisting of: magnitude and orientation; identifying presence of fracture based on calculated fracture magnitude; identifying fracture direction based on calculated fracture orientation; calculating predicted travel-times; calculating differences or residual errors between observed travel-times and predicted travel-times; identifying potential fault locations based on residual errors; inverting fracture magnitude and orientation using travel-time differences between a shallower horizon to a deeper horizon of interest to minimize overburden artifacts.
Abstract:
Refracted energy travel time can help to derive anisotropic parameters in a target layer. These anisotropic parameters allow us to both explore for new reservoirs and to understand stress and fracturing in existing reservoirs. This information can be used to i) detect oil reservoirs, ii) spot naturally fractured, hence high production zones, iii) detect dominant natural stress directions, iv) better place horizontal wells to optimize production, v) monitoring man made fractures or induced directional stress changes. The method is demonstrated using synthetic and real data.
Abstract:
The invention is an improved technique for measuring near surface attributes of the ground while conducting a seismic survey. The improved technique is enabled by an electric vibe using a number of linear electric motors that direct a rod or piston to contact the ground in a recurring fashion. By applying constant force on the rods of the linear electric motors against the ground, the penetration into the ground may be measured for both rate and overall deformation. This information provides an accurate indication of viscosity and stiffness. In addition shear velocity and compression velocity may be measured and in some conditions, even the type of prominent shear wave may be identified for the area.