5results about How to "Reduce mining difficulty" patented technology

The utility model is applicable to the technical field of brine exploitation, and provides a deep brine injection and extraction increasing system which comprises a main pipeline, two ends of the main pipeline are respectively connected with a system main water inlet and a system main water outlet, and a water treatment unit, an exhaust device, a pressurizing device and a monitoring device are arranged on the main pipeline. The water treatment unit comprises a filtering device; the filtering device comprises a coarse filtering assembly and a fine filtering assembly; a heating unit and a medicine dissolving unit are respectively arranged on the main pipeline between the water treatment unit and the exhaust device, the heating unit is used for carrying out temperature-controlled heating on the water body, and the medicine dissolving unit is used for carrying out medicine dissolving and uniform mixing on the water body. According to the device, pressurization, salt dissolving and displacement integrated water injection and extraction increasing can be integrally achieved, the brine target resource efficiency can be improved, the extraction difficulty is reduced, and the brine extraction sustainability is enhanced.

The invention relates to the technical field of natural gas extraction, and discloses a gas lift pressurization mixed transportation and CNG recovery system which comprises an integrated compressor skid, a high-pressure dehydration skid and a gas generator set, the integrated compressor skid is provided with a first inlet, a first outlet, a second outlet and a third outlet, the first inlet is communicated with an external transportation pipeline through a gas inlet pipeline, and the second outlet is communicated with a second transportation pipeline through a gas outlet pipeline; the first outlet is communicated with the output pipeline through a pressurization mixed transportation pipeline, the pressurization mixed transportation pipeline is located at the downstream of the gas inlet pipeline, the second outlet is communicated with the output pipeline through a gas lift pipeline, and the gas lift pipeline is located at the upstream of the gas inlet pipeline; the high-pressure dewatering skid is provided with a recycled moisture inlet and a dewatering and sewage discharging outlet, the recycled moisture inlet is communicated with the third outlet through a CNG recycled moisture pipeline, and the dewatering and sewage discharging outlet is communicated with the gas inlet pipeline through a dewatering and sewage discharging mixed conveying pipeline; the gas generator set is electrically connected to the integrated compressor sledge and the high-pressure dewatering sledge so as to provide electric energy for the integrated compressor sledge and the high-pressure dewatering sledge.

The invention discloses a shale gas two-layer development well bore structure design method and an implementation method thereof. The well bore structure design method comprises the following steps that S1, the upper reservoir well casing windowing position H1 is determined, H1 is smaller than or equal to H2-R, H2 is the vertical depth of an upper reservoir well A target point, R is the borehole curvature radius, and alpha is the build-up rate; s2, determining the cement return depth H3 of the oil-string casing of the lower reservoir well, wherein H3 is greater than or equal to H1 + 10; s3, the lower depth H4 of the technical casing of the lower reservoir well is determined, and H4 is larger than or equal to H3 + 300; and S4, determining the depth of the surface casing of the lower reservoir well according to the constraint condition # imgabs0 # for preventing the overflow shut-in fracturing formation. According to the method, the windowing position of the casing of the upper reservoir well, the cement return height of the oil-string casing of the lower reservoir well, the lower depth of the technical casing of the lower reservoir well and the lower depth of the surface casing of the lower reservoir well are specially designed, so that effective exploitation of the two reservoirs is guaranteed, and the exploitation efficiency and economic benefits are improved.

The application discloses a kind of steep coal seam group horizontal segmentation and trend longwall mixed mining method, comprising: according to the stage height of thin coal seam single mining calculated and determined when coal seam slips or is destroyed opportunity;According to the segmentation height of thick coal seam, according to the space coordination requirement calculation, the space coordination requirement is, after thin coal seam is mined according to stage height single, the projection length of top contact caving length after thick coal seam is mined according to μ segmentation height stage is same in horizontal plane, caving zone and fracture zone and goaf overlap;According to the corresponding single mining progress, the thin coal seam and the thick coal seam are alternately mined.The stage height of thin coal seam single mining and the segmentation height of thick coal seam are quantitatively calculated according to coal seam slip or destruction opportunity, and thin coal seam and thick coal seam are alternately mined according to the requirement of space and time coordination, impact strata control, strata movement control and the coordination of mining efficiency improvement are realized.

The utility model provides a before-pump viscosity reduction heating device, which comprises an oil pipe, a heater and a power supply device, the oil pipe is communicated with a Christmas tree, the heater is arranged on the oil pipe, the oil pipe section of the heater is a round pipe with a hole, the end part of the round pipe with the hole is provided with a round plug with a hole, and the heater is matched and connected with the power supply device. The power supply device comprises a low-voltage drawer switch, a boost frequency converter, a medium-voltage frequency conversion cabinet and a wellhead junction box, the low-voltage drawer switch is sequentially connected with the boost frequency converter, the medium-voltage frequency conversion cabinet and the wellhead junction box, and the wellhead junction box is respectively connected with the electric pump unit and the heater through cables. The device has the beneficial effects that the device is suitable for a special process for paraffin control of a high condensation layer and temperature-increasing and viscosity-reducing exploitation of a heavy oil well, the temperature of the heavy oil can be increased, the viscosity of the heavy oil is reduced, the fluidity of the heavy oil is improved, the exploitation difficulty is reduced, the oil well yield is improved, technical support is provided for large-scale development, and the device is easy to popularize and use.