A subsea hydrocarbon production field includes a number of first subsea christmas trees, a first manifold, a number of first flexible flowline jumpers, each of which is connected between the first manifold and a corresponding first tree. Each first flowline jumper includes a first flow conduit and a number of first umbilical lines, and each first flowline jumper includes a first end which is removably connected to a corresponding first tree by a first multibore hub and connector arrangement and a second end which is removably connected to the first manifold by a second multibore hub and connector arrangement.

An exploiting method and device of marine facies natural gas hydrate. The exploiting method comprises the following steps: (1) after the construction of a vertical well, a fixed pipe is constructed, the exploiting well is set in the center of the fixed pipe, and the mixture is filled between the inner wall of the fixed pipe and the outer wall of the exploiting well; (2) the self-excited oscillating jet nozzle enters the exploiting well along the vertical well to the designated position through an orifice on the exploiting well and sprays the mixture, so that the mixture is broken evenly to form artificial fractures; (3) under the corresponding temperature, the hydrate decomposes to produce gas by depressurized exploiting; (4) the gas-liquid mixture exploited by the exploiting well is separated into liquid and gas in the gas-liquid separation device to collect liquid and gas.

The invention relates to a subsea heating apparatus for heating a subsea component extending along a longitudinal direction, comprising an induction coupler including a first section with first core part(s) and a second section with second core parts, a respective first magnetic core part being coupled with a second magnetic core part to form a magnetic core ring adapted to surround an electrical conductor to be connected to a power source. At least one component electrical cable associated with the subsea component to be heated and adapted to receive power via the induction coupler for heating the subsea component. The coupler includes several windings each wound around a respective second core part and connected to respective component electrical cable(s). The second section is adapted to be attached to the subsea component and several second core parts are arranged in distinct radial positions around the longitudinal direction.

A method of optimizing production of a hydrocarbon-containing reservoir by measuring low-frequency Distributed Acoustic Sensing (LFDAS) data in the well during a time period of constant flow and during a time period of no flow and during a time period of perturbation of flow and simultaneously measuring Distributed Temperature Sensing (DTS) data from the well during a time period of constant flow and during a time period of no flow and during a time period of perturbation of flow. An initial model of reservoir flow is provided using the LFDAS and DTS data; the LFDAS and DTS data inverted using Markov chain Monte Carlo method to provide an optimized reservoir model, and that optimized profile utilized to manage hydrocarbon production from the well and other asset wells.

An exposed resistive heating element is coupled to an electric power supply. The exposed resistive heating element is malleable such that it can be wrapped around a component to be heated. A controller is coupled to the power supply and the exposed resistive heating element. The controller is configured to regulate current exchanged between the exposed heating element and the electric power supply.

A shear tester for in-situ determination of rock formation geomechanical properties is provided. The tester has a radially expandable cylindrical membrane, a metal sheath covering at least a portion of the outer surface of the membrane, at least one stud fixed on the sheath, at least one cone fixed on each of the at least one stud, and a piston operable to apply an upward axial force on the metal sheath. A device for the same use comprises the shear tester and a pressuremeter. A method of using the shear tester comprises applying a normal force to the formation by expanding the membrane until at least one of the at least one cone penetrates the rock formation and applying an upward axial force to the at least one of the at least one cone by operating the piston until at least a portion of the rock formation shears.

A method and system are shown that conditions an underground reservoir by flooding the reservoir with a heated fluid to transfer heat to the underground reservoir and cause oil and gas to increase flow during recovery from the underground reservoir, wherein the fluid is heated by heat from a geothermal well, or heated by heat generated by burning gas recovered from the underground reservoir, or heated by heat from both a geothermal well and heat generated by burning gas recovered from the underground reservoir, and recovering the oil and gas with the increased flow.

A method and system are shown that conditions an underground reservoir to cause oil and gas to increase flow, excites the conditioned underground reservoir with pressure waves to further increase flow, and recovers the oil and gas with the increased flow. The excitation may be done via one or more production wells in synchronism with excitation done via one or more conditioning wells so as to cause constructive interference of the pressure waves and further increase flow.

Thermal energy delivery and oil production arrangements and methods thereof are disclosed which heat a subterranean formation, and which comprises positioning concentric tubing strings in a wellbore; heating a heat transfer fluid using a surface thermal fluid heater; flowing a liquid or feedwater downward through an extremely hot innermost tubing string that is inside and concentric to an outermost tubing string and a casing/annulus, which extends below a thermal packer positioned in the wellbore, and continually circulating the heat transfer fluid through the outermost tubing string and the casing/annulus above the thermal packer such that the liquid or feedwater flowing through the innermost tubing string is heated thereby and injected into the wellbore below the thermal packer and out of perforations to heat the subterranean formation to temperatures that allow for hydrocarbon production from the subterranean formation. Emissions may be injected into the subterranean formation with the liquid or feedwater.

An exploiting method and device of marine facies natural gas hydrate. The exploiting method comprises the following steps: (1) after the construction of a vertical well, a fixed pipe is constructed, the exploiting well is set in the center of the fixed pipe, and the mixture is filled between the inner wall of the fixed pipe and the outer wall of the exploiting well; (2) the self-excited oscillating jet nozzle enters the exploiting well along the vertical well to the designated position through an orifice on the exploiting well and sprays the mixture, so that the mixture is broken evenly to form artificial fractures; (3) under the corresponding temperature, the hydrate decomposes to produce gas by depressurized exploiting; (4) the gas-liquid mixture exploited by the exploiting well is separated into liquid and gas in the gas-liquid separation device to collect liquid and gas.