36results about How to "Mining went well" patented technology

The invention relates to a method for treating the strata above an underground gasification channel and a method for building an underground gasification furnace. The above processing method includes: establishing a passage in the rock formation above the underground gasification passage and / or in the aquifer above the rock formation; injecting a reinforcement agent into the passage when a passage is established in the rock formation, so that the reinforcement agent is in the passage and its surroundings. Solidification in the rock formation; when a channel is established in the aquifer, an expanding material is injected into the channel so that the expanding material absorbs the water contained in the aquifer surrounding the channel. The method for building an underground gasification furnace includes: strengthening the rock formation and / or absorbing water in the aquifer according to the above-mentioned treatment method; establishing an inlet well, a horizontal passage and a gas outlet well, wherein the horizontal passage is located in the reinforced rock formation or the aquifer in which the water content has been reduced in the coal seam below. During the underground gasification process, it can ensure that the rock formation above the gasification channel is firm and / or prevent the water contained in the aquifer from entering the combustion zone, thereby improving the service life of the underground gasification furnace.

The invention provides a method for exploiting a sulfur-containing gas reservoir of carbonate rocks and relates to the technical field of exploiting of the sulfur-containing gas reservoir. According to the exploiting method, a dynamic distribution curve of sulfur deposition saturability of the sulfur-containing gas reservoir is predicted firstly, and the sulfur-containing gas reservoir is exploited according to the dynamic distribution curve of sulfur deposition saturability. The technical problem that shutdown often happens in the actual exploiting process of the sulfur-containing gas reservoir due to the fact that the sulfur solubility is difficult to calculate and sulfur deposition in the exploiting process cannot be reflected really when the sulfur-containing gas reservoir is exploitedis solved with the exploiting method, and the purpose that smooth exploiting of the sulfur-containing gas reservoir can be effectively guaranteed is achieved.

The invention relates to the technical field of auxiliaries for oil-gas exploration drilling in oil fields, in particular to an acid soluble mineral fiber medium-coarse bridging agent, a bridging fluid and a preparation method thereof. In raw materials of the acid soluble mineral fiber medium-coarse bridging agent, the particle size of limestone is 2.5mm-4.2mm, the particle size of mica is 2.5mm-4.2mm, and the particle size of vermiculite is 2.0mm-4.0mm. After the acid soluble mineral fiber medium-coarse bridging agent is added into plugging slurry under conditions of deep wells, ultradeep wells, high temperature, high density and high pressure, normal fluidity of drilling fluid can be kept; due to high acid solubility, when strong acid is injected for oil-gas exploitation after leakage stoppage, the acid soluble mineral fiber medium-coarse bridging agent is dissolved, so that pollution-free smooth oil-gas exploitation is guaranteed; the bridging fluid obtained by adoption of the acid soluble mineral fiber medium-coarse bridging agent is applicable to various leakage layers and excellent in leakage stopping effect.

The invention discloses an ore mining structure and method under the condition of an extremely broken ore body, which are used for a mining area crossed with the trend of the extremely broken ore body, and comprise a false roof drift which is positioned above the extremely broken ore body and is arranged along the horizontal direction, and an upper ore body and a lower ore body which are respectively arranged on the upper side and the lower side of the false roof drift, an artificial false roadway is arranged in the area, located over the extremely broken ore body, of the false roof drift, an artificial false roof is arranged in the artificial false roadway, and the artificial false roof comprises a supporting structure arranged at the top end and the inner circumferential wall of the artificial false roadway, a reinforcing mesh arranged at the bottom end of the artificial false roadway and a filling body filled in the artificial false roadway. By means of the mode, the artificial roof is arranged above the extremely-broken ore body, the two supporting systems of the supporting structure and the reinforcing mesh are arranged at the artificial roof, the good supporting effect on ore rocks on the upper layer of the artificial roof can be achieved, and smooth mining of the extremely-broken ore body below the artificial roof is guaranteed.

The invention discloses mining supporting support equipment which comprises a middle hydraulic support device and end hydraulic support devices, wherein the middle hydraulic support device is used for supporting a mining working surface top plate, the end hydraulic support devices are located in troughs in two ends of a mining roadway and used for supporting the ends of a trough plate, the end hydraulic support devices are arranged at two ends of the middle hydraulic support devices respectively, a transition hydraulic support device is arranged between the end hydraulic support device at each end and the middle hydraulic support device, height of the middle hydraulic support device supporting top end of the middle hydraulic support device, the transition hydraulic support device supporting top end of the transition hydraulic support device and the end hydraulic support device supporting top ends of the end hydraulic support devices can be adjusted in the vertical direction, and the middle hydraulic support device supporting top end and the end hydraulic support device supporting top ends are arranged in flush. The invention further discloses a mining method used for the mining supporting support equipment to mine trough top coal in a fully mechanized coal mining face.

The present invention relates to a low-level multi-stage perforated drilling method for gas drainage in coal-rock interbedded coal seams. (Right) A 0.3-1m slope downhill (3) penetrating into the bottom rock layer (2) of all coal-rock interbeds (2) is constructed on the side of the slope, and a length × width × height = 3.0m × 2.5m × 2m low-level drilling site (4), in which several low-level multi-stage through-layer drilling holes (5) are constructed obliquely upward along the roadway excavation direction to the mining layer, and inserted into multiple Step bushings (6‑1), (6‑2), (6‑3), use Ф120mm rubber hose (11) to connect the bushings (6‑1) with multi-pass, and connect with the gas pump in the roadway The mining pipelines (12) are connected and converged, and the low-level multi-stage cross-layer drilling (5) is connected to the gas extraction operation. The invention effectively drains the coal seam floor gas, is safe and efficient, and can be used for the implementation of outburst prevention measures on the working face.

The invention relates to the technical field of auxiliaries for oil-gas exploration drilling in oil fields, in particular to an acid soluble mineral fiber fine bridging agent, a bridging fluid and a preparation method thereof.In raw materials of the acid soluble mineral fiber fine bridging agent, the particle size of limestone is 0.045mm-2.5mm, the particle size of mica is 1.4mm-2.5mm, and the particle size of vermiculite is 0.3mm-2.0mm. After the acid soluble mineral fiber fine bridging agent is added into plugging slurry under conditions of deep wells, ultradeep wells, high temperature, high density and high pressure, normal fluidity of drilling fluid can be kept; due to high acid solubility, when strong acid is injected for oil-gas exploitation after leakage stoppage, the acid soluble mineral fiber fine bridging agent is dissolved, so that pollution-free smooth oil-gas exploitation is guaranteed; the bridging fluid obtained by adoption of the acid soluble mineral fiber fine bridging agent is applicable to various leakage layers and excellent in leakage stopping effect.

The invention provides a device for continuously injecting hot seawater to exploit seabed natural gas hydrate. The device comprises: a plurality of downwater pipes (1), the inlet end of which is arranged near the sea level, and the position of the inlet end is higher than the sea level; a plurality of heat dissipation pipes (1). 3), distributed in the seabed hydrate layer (6) in the form of a spider web or hexagonal network or branch or ring structure; at least one outlet pipe (2), the outlet end is set near the sea level, and the outlet pipe (2) The outlet end of the outlet pipe is equal to or lower than the inlet end of the downwater pipe (1); the plurality of downwater pipes (1), the plurality of cooling pipes (3) and at least one outlet pipe (2) are connected in sequence to form a connector. Making full use of the static pressure transmission principle of the connector, the high-temperature seawater on the surface of the sea surface is continuously passed through the cooling pipe laid in the hydrate layer on the seabed only by a common type of low-power centrifugal pump. The heat dissipation pipes of the present invention are arranged in a mesh structure, which can improve heat dissipation efficiency, expand heat dissipation area, and improve mining efficiency.