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Long spiral hydraulic supporting and expanding drilling tool
The invention discloses a long spiral hydraulic supporting and expanding drilling tool and belongs to the technical field of drilling tool structures. The drilling tool comprises a drill rod, a drill bit, a multipath steering gear, a hollow oil cylinder, a high-pressure water pump and a supporting and expanding device assembly. The drill rod is composed of a hollow inner pipe and an outer pipe provided with spiral blades. An installing space of the supporting and expanding device assembly is reserved in the lower middle section of the outer pipe provided with the spiral blades. The multipath steering gear and the drill bit are installed at the two ends of the drilling tool respectively. A pipeline of the high-pressure water pump and a pipeline of the hollow oil cylinder are installed inside the drill rod. The supporting and expanding device assembly is installed between the outer pipe provided with the spiral blades and a core pipe. When the supporting and expanding device assembly is in a closed state, a continuous spiral structure is formed by spiral pieces on the outer peripheral surface of the supporting and expanding device assembly and spiral pieces on the outer peripheral surface of the outer pipe provided with the spiral blades; when the supporting and expanding device assembly is in an open state, the supporting and expanding device assembly unfolds gradually under the action of the hollow oil cylinder, and a closed supporting and expanding structure is formed. According to the long spiral hydraulic supporting and expanding drilling tool, a long spiral supporting and expanding disc formation process is achieved in a real sense, and a long spiral construction process in an original state is reserved.
Long spiral hydraulic supporting and expanding drilling tool
The invention discloses a long spiral hydraulic supporting and expanding drilling tool and belongs to the technical field of drilling tool structures. The drilling tool comprises a drill rod, a drill bit, a multipath steering gear, a hollow oil cylinder, a high-pressure water pump and a supporting and expanding device assembly. The drill rod is composed of a hollow inner pipe and an outer pipe provided with spiral blades. An installing space of the supporting and expanding device assembly is reserved in the lower middle section of the outer pipe provided with the spiral blades. The multipath steering gear and the drill bit are installed at the two ends of the drilling tool respectively. A pipeline of the high-pressure water pump and a pipeline of the hollow oil cylinder are installed inside the drill rod. The supporting and expanding device assembly is installed between the outer pipe provided with the spiral blades and a core pipe. When the supporting and expanding device assembly is in a closed state, a continuous spiral structure is formed by spiral pieces on the outer peripheral surface of the supporting and expanding device assembly and spiral pieces on the outer peripheral surface of the outer pipe provided with the spiral blades; when the supporting and expanding device assembly is in an open state, the supporting and expanding device assembly unfolds gradually under the action of the hollow oil cylinder, and a closed supporting and expanding structure is formed. According to the long spiral hydraulic supporting and expanding drilling tool, a long spiral supporting and expanding disc formation process is achieved in a real sense, and a long spiral construction process in an original state is reserved.
Long spiral hydraulic supporting and expanding drilling tool
TENG JINLING (author) / PENG JIAN (author)
2016-01-13
Patent
Electronic Resource
English
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