Fishing method of downhole hammer drilling tool
A down-the-hole hammer and drilling tool technology, which is applied to drill pipes, drill pipes, drilling equipment, etc., can solve the problems of difficulty in salvaging the down-the-hole hammer and drilling tools, and achieve the effects of easy and rapid salvage, high efficiency and cost reduction.
Active Publication Date: 2020-06-26
SHENZHEN GONGKAN GEOTECHN GRP +1
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[0005] The purpose of the present invention is to provide a fishing method for down-the-hole hammer drilling tools, aiming to solve the problem of difficult fishing for down-the-hole hammer drilling tools in the prior art
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[0039] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0040] The implementation of the present invention will be described in detail below in conjunction with specific embodiments.
[0041] In the drawings of this embodiment, the same or similar symbols correspond to the same or similar components; The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orien...
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The invention relates to the technical field of downhole hammer drilling tool in-hole accident handling, and discloses a fishing method of a downhole hammer drilling tool. The fishing method comprisesthe following steps that drilling tool sediments falling in a hole are removed; a catcher is mounted on a lifting device, wherein the catcher is provided with a butt joint through hole, a clamping pin moving in the direction facing or deviating from the butt joint through hole is transversely arranged on the side wall of the butt joint through hole, and the clamping pin protrudes out of the buttjoint through hole; the butt joint through hole is used for being in butt joint with a hexagonal square head of the drilling tool, and the clamping pin is used for being embedded in a pin hole of thehexagonal square head; the catcher is lowered into the hole, and the drilling tool is caught; the drilling tool is fished out of the hole; and the drilling tool and the catcher are unlocked and separated. According to the fishing method of the downhole hammer drilling tool, fishing is easy and rapid.
Description
technical field [0001] The patent of the present invention relates to the technical field of in-hole accident handling of down-the-hole hammer drilling tools, and specifically relates to a fishing method for down-the-hole hammer drilling tools. Background technique [0002] When the cast-in-situ pile is drilled with a down-the-hole hammer, the high wind pressure provided by the air compressor is used as the power. The high wind pressure enters the down-the-hole hammer impactor through the air pipe and the inner cavity of the drill pipe, and drives the down-the-hole hammer bit to perform high-speed reciprocating impact operations. The slag and debris broken by the down-the-hole hammer are carried by the high wind pressure to the ground along with the gap between the drill pipe of the down-the-hole hammer and the hole wall. [0003] The down-the-hole hammer impactor is connected to the drill pipe through a hexagonal joint. The hexagonal joint is composed of a hexagonal head, a...
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IPC IPC(8): E21B31/20E21B17/02
CPCE21B31/20E21B17/021
Inventor 童心尚增弟雷斌黄凯李波李新元刘治军杨静
Owner SHENZHEN GONGKAN GEOTECHN GRP