210 results about "Horizontal branch" patented technology

The invention relates to a construction method for enhancing the extraction effect of a ground coal bed gas, comprising the following steps of: (1) constructing a vertical cave well, forging caves on coal beds with coal bed gases needed to extract, and placing fiberglass casings into the caves; (2) constructing a vertical well section and a lower branched main horizontal well hole of a horizontal well, respectively forwards constructing the lower branched main horizontal well hole and a horizontal branched well hole positioned in front of a lower branched cave after butting with the vertical cave well, returning to a position nearby the rear end of the vertical cave well and then constructing a horizontal branched well hole positioned at the rear of the lower branched cave; (3) after a lower branched well hole is constructed, carrying out side drilling to construct an upper branched well hole; (4) after an uppermost branched well hole is constructed, plugging inclined well sections of main horizontal well holes inside the horizontal well from a side drilling windowing point to a coal seeing point by using cementing cement; (5) drilling and flushing the vertical cave well, installing discharge and extraction equipment, and extracting the coal bed gas by discharging water and reducing pressure on the ground. The invention can shorten the construction period, reduce the construction and production cost, decrease the lands used for construction and extraction and enhance the extraction effect of the ground coal bed gas.

The invention provides a loose blasting gas extraction method of a horizontal branch well of a coal seam floor. The method sequentially comprises the following steps of selecting a coal reservoir with a gas content of more than 8m3/t and a solid coefficient f of less than 0.5; selecting 1-2 m coal seam floor as a layer of a main horizontal well and a branch horizontal well; determining positions of a ground well mouth and a deflection point according to the layer of the main horizontal well section; using a trisected structure as a well body structure and using open hole wells as the main horizontal well and the branch horizontal well; constructing the main horizontal well and the branch horizontal well in a selected floor rock layer; placing explosive points on the branch horizontal well section, wherein the explosive points are connected with each other by lines; and detonating all explosives through the ground; and mounting gas extraction equipment to extract the gas on the ground, wherein the gas can also be extracted at a negative pressure in a coal mining stage so that the well has multiple purposes. By using the method, the gas can be extracted on a soft coal ground to eliminate outburst and furthest reduce gas outburst disasters, and the gas (coal bed gas) resources can also be developed.

The invention relates to a coalbed methane (CBM) cluster double multi-branch horizontal well and a drilling method relative to discharging and mining vertical well system; the method includes: drilling the relative to discharging and mining vertical well according to the cluster wing position differences, finishing drilling the second section of the discharging and mining vertical well, adopting the completion method with lower sleeve at the upper part and naked eye at the lower part, the type of the sleeve is the combination of the steel sleeve and the glass fiber reinforced plastic sleeve; adopting the hole building mode for building the hole at the naked eye section by spraying, cutting the sleeved at the section with glass fiber reinforced plastic sleeve for forming the hole; adopting the building type deflecting mode for connecting the main well hole and the discharging and mining well hole in a long distance, drilling the horizontal branch section after finishing connecting; fixing and sealing the pocket of the discharging and mining well, washing the well, fixing and sealing the deflecting section, the branch wing can be used for production; finishing the other wings by the same process. The single well sweep area and the daily output are raised by the method, the construction cost is reduced, the security coefficient is increased and the construction period is shortened.

An implantable nerve stimulation device has a sensor system, a data processor in communication with the sensor system, and a nerve stimulation system in communication with the data processor and constructed to provide electrical stimulation to at least one branch of at least one vestibulocochlear nerve. The nerve stimulation system includes an electrode array that has a first plurality of electrodes structured to be surgically implanted in electrical communication with a superior branch of the vestibular nerve, a second plurality of electrodes structured to be surgically implanted in electrical communication with a horizontal branch of the vestibular nerve, a third plurality of electrodes structured to be surgically implanted in electrical communication with a posterior branch of the vestibular nerve, and a common crus reference electrode structured to be surgically implanted into a common crus of the vestibular labyrinth.

A new multi-branch well drilling and completion method relating to oil and geological exploration is that enters and seals a permanent positioning device 1 in the main well eye; so that the upper eye of the main well window is separated from the down well eye; After the positioning, it makes the oblique machine 6 after adjusting the tool angle on the ground is put into the main well eye, and is hang on the positioning device1. The conventional tool is put into the well to do the directionally opening window, drilling the well and putting the sleeve to fix the well and completing well. After drilling, the cowl milling machine 10 reclaims the overlapping segment of the tail pipe of the main well holes and the oblique machine 6. Repeating above steps, so it drills several horizontal branch well holes or directed branch well holes in the same main well hole, so it realizes the reliable positioning of the oblique machine. It can bear large drilling pressure and drilling torque, so it fully satisfies the opening windows, lateral drilling, milling, cowl milling and other construction sets; and it makes the main well diameter largest so that the oil production, ribbing well and oil layer reforming can perform normally. It can drill several branches in the same main well shaft and the number of branch well is not limited.

The invention provides a single-well coal bed gas multi-branch horizontal well drilling and completion method. The method includes the steps that a vertical shaft section, an angle building section, an angle maintaining section and a hole angle increasing section are sequentially drilled from the ground, the tail end of the hole angle increasing section reaches a target coal bed, then at least one horizontal branch which is connected to a horizontal section is drilled in sequence along the target coal bed, and the hole drift angle of the horizontal branch is made to be larger than or equal to the hole drift angle of any point on the angle maintaining section and the hole angle increasing section; moreover, every time one horizontal branch is drilled, a sieve tube is tripped into the horizontal branch, and an annular gap is formed between the sieve tube and the horizontal branch; the upper portion of the angle maintaining section is used for placing water drainage and gas production equipment, and the angle maintaining section and the hole angle increasing section below the water drainage and gas production equipment are used as a bag. The single-well coal bed gas multi-branch horizontal well drilling and completion method changes the well drilling sequence of a traditional well drilling method, the sieve tube is tripped into each horizontal branch, thus safety production is achieved, and yield is increased.

The invention relates to a completion method for a natural-gas-hydrate large-borehole and multi-branch-radial-horizontal-borehole well. According to the technical scheme, the completion method includes the steps that a large-size drill bit is adopted to drill by a target well depth at a time to form a large main borehole, a plurality of horizontal branch boreholes are drilled in a natural gas hydrate reservoir with a radial horizontal well technology, and the contact superficial area between the reservoir and the boreholes is increased to the maximum degree. The completion method has the advantages that underground complex conditions in the exploitation process are avoided or reduced, and the number of the branch boreholes can be greatly increased; the bare area and the depth of the natural gas hydrate reservoir are increased to the maximum degree through the multiple branch radial horizontal boreholes, the recovery ratio is greatly increased, the number of distributed wells is decreased, and development investment is reduced; adopted window sealants, namely cement paste systems are stable, strength development is rapid, thickening time is adjustable, hydrate-layer sealing shallow-layer water-gas channeling can be effectively prevented, and good construction performance is achieved.

The invention provides a three-frequency-band high-gain omnidirectional dipole antenna comprising a three-frequency oscillator array, balanced feeder lines, a first dielectric plate, a second dielectric plate, and a third dielectric plate. The first dielectric plate, the second dielectric plate, and the third dielectric plate are arranged successively from top to bottom. The balanced feeder lines are arranged at the top surface and the bottom surface of the second dielectric plate and are printed along the axis direction of a three-frequency oscillator unit. The balanced feeder lines are parallel dual-line transmission lines. The three-frequency oscillator units in the three-frequency oscillator array are printed at the first dielectric plate and the third dielectric plate; and feeding points among all three-frequency oscillator units are connected by the balanced feeder lines. The three-frequency oscillator units consist of upper arms and lower arms, wherein the upper arms and the lower arms are arranged in a mirror symmetry mode. The upper arms and the lower arms include first branches, second branches, and third branches, wherein the first, second, and third branches are arranged along parallel axes; the second branches and the third branches are arranged at the two sides of the first branches symmetrically and the bottoms are connected into one by horizontal branches; and balanced feeding points are formed at central protrusions of the upper arm and the lower arm. The three-frequency-band high-gain omnidirectional dipole antenna has advantages of high gain, omnidirectivity, high efficiency, small size, and low cost; and an effective or benefical reference is provided for an optimized design of other multi-frequency or broadband high-gain omnidirectional array antennas.

The invention discloses an experiment device and an experiment method for simulating blowout depressurization of a fourth-stage automatic depressurization system for a reactor. The experiment device comprises a pressure container, a T-shaped tube experiment section, a steam-water separator, a capturing water tank, a heating water tank, a second filter and a high-temperature pump, wherein a horizontal heat tube section of the pressure container is connected with a horizontal branch tube of the T-shaped tube experiment section; a vertical branch tube of the T-shaped tube experiment section is connected with the capturing water tank through the steam-water separator; the capturing water tank is connected with the heating water tank through a pipeline; the heating water tank is connected with a water inlet of the pressure container through the filter, the high-temperature pump and a preheating section. The experiment device can execute two experiments for converting air into water and converting steam into water; the air-to-water experiment can be used for executing mechanism-based experiments such as entrainment start and a steady-state entrainment rate, and the steam-to-water experiment can be used for executing the mechanism-based experiments and also executing a blowout pressure release simulation experiment of the ADS-4 (fourth-stage automatic depressurization system). The experiment device has the advantages of high safety, high experiment data precision, easiness in mounting and maintenance and the like.

The invention discloses a method for draining gas of a highly gassy coal mine. The method comprises the following steps of: 1, opening a downward drilling layer up to a specified depth, and performing surface casing well cementation to form a surface straight well section; 2, opening a side drilling window, making inclined drilling up to a landing point of a specified coal seam roof, and performing intermediate casing well cementation to form an inclined drilling well section; and 3, drilling in the coal seam roof from the landing point of the coal seam roof to form a plurality of broom-shaped horizontal branch wells, and draining the gas by using the plurality of broom-shaped horizontal branch wells. By the technical scheme, the gas can be quickly and effectively drained.

The present invention provides a kitchen modular water supply and sewerage device in one layer. It includes gathering water tank, stand pipe short pitch, water supply and sewerage piece connecting mouth installed on gathering water tank, sealing horizontal branch pipe connecting with stand pipe short pitch and closet outlet connecting sealing horizontal branch pipe, said water supply and sewerage device also includes gathering bucket, said gathering water tank is installed on the top of said gathering bucket, the lower of said stand pipe short pitch is installed in said gathering bucket, the lower of said gathering bucket is equipped with escape-pipe; the bottom of said gathering water tank is equipped with water discharging hole, said water discharging hole is connected with gathering bucket; said water discharging hole lower is equipped with water sealing device; said water discharging hole upper is equipped with overflow pipes. The water supply and sewerage device changes the installation mode of prior water supply and sewerage system, sets out leakage, odor, blocking and other technical problems in prior toilet water discharging, and the installation is convenient, users can choose toilet equipment placement themselves and the interior space is beautified.

The invention relates to the field of geothermal development, and provides a pressure crack network design and completion method for an enhanced geothermal system. The method comprises the steps thatthe upper portion of an igneous rock type hot dry rock is reached through drilling, a horizontal well section is drilled by using a guiding well drilling technology, multi-stage segmented hydraulic fracturing is utilized, a horizontal crack network is produced by utilizing layer-shaped brittle components in an igneous rock body, two horizontal branch wells located on the same horizontal plane witha water injecting well section are drilled at the end of the horizontal well section of a water injection well, the rear end of a crack of the horizontal well section of the water injection well after fracturing is conducted is penetrated to complete docking, a horizontal crack network passage with high seepage is constructed, fluid can enter in a well tube along the crack on which fracturing isconducted, and energy utilization can be conducted after the fluid is exploited to the ground surface. By adopting a branch well, a micro vibration detection and processing system and a hydraulic fracturing technology, a hot dry rock storage layer is effectively recognized, the storage layer is opened to the maximum extent, geothermal energy of the hot dry rock storage layer is fully utilized, andthe exploiting efficiency of the geothermal energy is significantly improved.

The invention discloses a split-flow automatic control system of a coal bed methane horizontal branch well. The split-flow automatic control system of the coal bed methane horizontal branch well comprises a ground manifold structure and an automatic control system, the ground manifold structure comprises a first mud input pipeline (A), a second mud input pipeline (B), a mud outlet pipeline (C), an auxiliary mud outlet pipeline (D) and a gas injection pipeline (E), and the automatic control system comprises a field sensor, a field bus (26), an industrial control computer (27), a programmable logic controller PLC (29) and an electric actuating mechanism. The invention further discloses a well drilling process of the system. The split-flow automatic control system of the coal bed methane horizontal branch well and the well drilling process of the system have the advantages of being capable of eliminating pressure fluctuation in a shaft caused by a switch pump and capable of adjusting opening of a throttling valve automatically, guaranteeing that pressure in the shaft remains stable, being capable of guaranteeing that a gas phase and a liquid phase are mixed evenly in a coal bed methane horizontal branch well aerated underbalanced process, and preventing large displacement drilling fluid from flushing well walls while guaranteeing drilling fluid rock carrying efficiency of a high-inclination well section.

The invention relates to a natural gas exploitation simulator of a multi-angle horizontal branch well, which is applied to a special physical simulation test of an unconventional natural-gas development horizontal well. The natural gas exploitation simulator is characterized in that: a multi-angle branch well model comprises a main pipe and branch pipes, wherein 4 to 12 branch pipes are welded on the main pipe and communicated with the main pipe, and an included angle between the central line of the branch pipes and the central line of the main pipe is within 25 to 65 degrees, and the length of each branch pipe is within 500 to 1000mm; a main pipe seal head is fixed at the liquid outlet end of the main pipe; end covers are arranged at the liquid inlet ends of the branch pipes and the main pipe, a pipeline and an injection pump are connected to each end cover, a flowmeter and a valve are serially connected to the pipeline, and a pressure sensor is also connected to the pipeline. The invention has the advantages of simulating technical parameters of exploitation fluids in multi-angle and multi-branch wells, researching the formation sand production situation and a sand washing process in the horizontal branch well exploitation process of unconventional natural gas and providing basic parameters of formation pressure distribution, water drainage and gas production systems, and the like for the unconventional natural gas exploitation.

The invention relates to a cultivation method capable of wintering brewing grapes, and belongs to the technical field of fruit tree cultivation. The method comprises the steps of brewing grape field planting, wherein firstly planting is conducted by opening deep furrows, line spacing is 2.0-3.0 m, plant spacing is 40-60 cm, the field planting furrows with the width of the section of 40-55 cm and the depth of 40-45 cm are dug before grape field planting, and the field planting furrows are filled with an organic fertilizer and surface soil evenly mixed according to the applied amount of the organic fertilizer of 5-10 m<3> every mu (a Chinese area unit and is equal to 666.67 m<3>) after the furrows are opened; pruning on the whole branches and wintering, wherein after the leaves are fallen in next autumn, a single-arm parallel dual-steer-wire frame building flabellate shaping mode with main branches of 35-40 cm and a flabellate shaping mode with the main branches of 35-40 cm are adopted to bundle the horizontal branches on the second wire; setting a brewing grape frame building mode, wherein a parallel dual-steer-wire frame building flabellate shaping mode is adopted, and the height of the whole frame of the galvanized iron rods is 2.1 m. The brewing grape is good in transparency, and bears uniform illumination, and the diseases and insect pests do not easily occur.

The invention discloses a guide support for accurate puncture under CT. A vertical rod is fixed on a base plate, and a cross bar is supported on the vertical rod. A counterweight is hung at one end of the cross bar, the other end of the cross bar is connected with a horizontal platform, and the counterweight and the horizontal platform are balanced. A horizontal branch piece is connected with the horizontal platform, a protractor is placed between a rotating lever and the horizontal branch piece, and the protractor is fixed on the horizontal branch piece. The rotating lever is connected to the horizontal branch piece in a rotating mode, a correction laser lamp is arranged at one end of the rotating lever, and a puncture guide piece is arranged at the other end of the rotating lever. The puncture guide piece is arranged on the rotating lever in a sliding mode, the puncture guide piece is parallel to a pointer of the protractor, and a laser needle is arranged in the puncture guide piece. The guide support is provided with a level gauge, and after correction, the puncture needle can be kept in the vertical plane; a laser positioning system is arranged, the plane where the puncture needle is placed can be perpendicular to the horizon and be perpendicular to the long axis at the same time, and therefore the plane of the puncture needle is completely consistent with the CT scanning plane.

The invention discloses a tree-like refuse leachate generated in landfill construction and closure as well as a landfill gas guide and exhaust system and method. The landfill gas guide and exhaust system comprises gabions, gas collecting shafts, horizontal branch gas collecting pipes, water guide blind ditches and a leachate collecting device, wherein the gas collecting shafts are arranged according to the slopes of a backfilling units of a refuse landfill and are enabled to be parallel to the axes of refuse dump backfilling units; one layer of branch gas collecting pipe is paved on every 1-2 backfilling units, and the branch gas collecting pipes communicate with the gas collecting shafts; the water guide blind ditches are arranged in a dump in a layered way, and every two adjacent layers of water guide blind ditches are communicated through the vertically arranged gabions; and the gas collecting shafts communicate with each layer of water guide blind ditch through the gabions. A tree-like guide and exhaust system is established for landfill gas and leachate according to the structure of the refuse landfill, the landfill gas and the leachate are connected and crossed by using pipelines, the arrangement of the water guide blind ditches in the vertical direction is omitted due to the communication of the gas collecting shafts and the water guide blind ditches, so that the collecting efficiencies of the landfill gas and the leachate are increased, meanwhile, the investment cost is reduced, and the landfill gas guide and exhaust system is safe and simple in operation.