Abstract: A coiled tubing flexible drill rod ultra-short radius radial drilling method, including: when in a first operation mode, activating a screw motor and a flexible power drilling tool located at a lower part of a coiled tubing; when in a second operation mode, only activating the screw motor and deactivating the flexible power drilling tool; and when in a third operation mode, only activating the flexible power drilling tool connected to the drill bit below. A corresponding drilling string and system are also disclosed. The method and system can achieve the effects of a small deflecting radius, an adjustable deflecting angle, a high operating efficiency and a low risk.

Abstract: A jujube harvesting apparatus with adjustable suction vector includes: an air duct assembly, where one end of which is arranged with an air duct inlet; a wind power device arranged on one end of the air duct assembly deviating from the air duct inlet and connected to the air duct assembly, where the wind power device is used for generating wind power; an ionization device arranged on the air duct assembly and positioned between the air duct inlet and the wind power device, where the ionization device is used for ionizing air in the air duct assembly to generate plasma; a magnetic field generating device including a first strip-shaped permanent magnet and a second strip-shaped permanent magnet; and a suction vector adjustable device including two moving assemblies, two rotating assemblies, an electromagnetic sensor component, and a control module.

Abstract: A coiled tubing flexible drill rod ultra-short radius radial drilling method, including: when in a first operation mode, activating a screw motor and a flexible power drilling tool located at a lower part of a coiled tubing; when in a second operation mode, only activating the screw motor and deactivating the flexible power drilling tool; and when in a third operation mode, only activating the flexible power drilling tool connected to the drill bit below. A corresponding drilling string and system are also disclosed. The method and system can achieve the effects of a small deflecting radius, an adjustable deflecting angle, a high operating efficiency and a low risk.

Abstract: An auxiliary feeding device for a flexible pipe of a radial horizontal well, comprising an oil pipe, a steering gear connected to the oil pipe at a lower opening, and two impellers. Each of the impellers comprises an impeller shaft, a barrel body and at least three blades fixed outside the barrel body and provided at a top thereof with a notch, where the two impeller shafts are parallel to each other. The two impellers are parallel and are synchronously rotated, and the notches on two sides of the inlet are in one-to-one correspondence relation to form a holding passage that can clamp the flexible pipe.

Abstract: The present disclosure provides a hydrothermal geothermal development method of multilateral well closed circulation, comprises the steps of: dividing a geothermal reservoir into single layers according to geothermal reservoir geological conditions, wherein an upper single layer with a lower water temperature and a higher permeability is taken as a recharge layer, and a lower single layer with a higher water temperature is taken as a production layer; tripping a production casing, and injecting cement for well cementation; performing casing lateral windowing in a vertical hole corresponding to the recharge layer, and drilling several branch radial horizontal holes into the recharge layer; performing casing lateral windowing in the vertical hole corresponding to the production layer, and drilling several branch radial horizontal holes into the production layer; tripping a guiding pipe into the production casing of the vertical hole, with a depth thereof reaching a well section between the recharge layer and th

Abstract: The present invention provides an auxiliary feeding device for a flexible pipe of a radial horizontal well, comprising an oil pipe, a steering gear connected to the oil pipe at a lower opening thereof, and two impellers; an upper end surface of the steering gear is provided with an accommodating groove; the steering gear is internally provided with a through steering passage in an axial direction thereof for allowing an external flexible pipe to pass through; an inlet of the steering passage is located at a bottom wall of the accommodating groove, and an outlet of the steering passage is located at a lower portion of a sidewall of the steering gear; the two impellers are symmetrically disposed on two sides of the inlet; each of the impellers comprises an impeller shaft, a barrel body rotatably surrounding the impeller shaft, and at least three blades fixed outside the barrel body and provided at a top thereof with a notch, wherein the two impeller shafts are parallel to each other; the two impellers are synch

Abstract: The present disclosure provides a hydrothermal geothermal development method of multilateral well closed circulation, comprises the steps of: dividing a geothermal reservoir into single layers according to geothermal reservoir geological conditions, wherein an upper single layer with a lower water temperature and a higher permeability is taken as a recharge layer, and a lower single layer with a higher water temperature is taken as a production layer; tripping a production casing, and injecting cement for well cementation; performing casing lateral windowing in a vertical hole corresponding to the recharge layer, and drilling several branch radial horizontal holes into the recharge layer; performing casing lateral windowing in the vertical hole corresponding to the production layer, and drilling several branch radial horizontal holes into the production layer; tripping a guiding pipe into the production casing of the vertical hole, with a depth thereof reaching a well section between the recharge layer and th