shortened pdc drill bit and its loader

A technology of loader and drill bit, applied in the direction of drill bit, drill pipe, drill pipe, etc., can solve problems such as unfavorable impact force transmission, and achieve the effect of shortening the overall length
CN106014264BActive Publication Date: 2017-10-10LANGFANG DINGXIN LIANTUO IND & COMMERCE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
LANGFANG DINGXIN LIANTUO IND & COMMERCE
Publication Date
2017-10-10

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Abstract

The invention relates to a shortened PDC bit and an assembling and disassembling device for the shortened PDC bit. The shortened PDC bit comprises a crown body (11) and a thread connection part (13), wherein the crown body (11) is provided with a plurality of cutting edges (12); an assembling and disassembling groove (14) is formed between every two adjacent cutting edges (12); each assembling and disassembling groove (14) is sunken inwards from the edge of the upper surface of the crown body (11) and comprises a disassembling side face (21) and an assembling side face (22) which are opposite; the assembling and disassembling grooves (14) are asymmetric grooves; the length s1 of each disassembling side face (21) is greater than the length s2 of each assembling side face (22); and the thread connection part (13) is connected to the lower portion of the crown body (11), and the periphery of the thread connection part (13) is provided with a thread. According to the shortened PDC bit, a bit sub part of a traditional PDC bit is removed, so that the overall length of the PDC bit is greatly shortened.
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Description

technical field

[0001] The invention relates to a drill bit and its loading and unloading tool, in particular to a shortened PDC (Polycrystalline Diamond Compact, polycrystalline diamond compact) drill bit and a loader and unloader for the drill bit. Background technique

[0002] In the oil drilling process, the performance of the drill bit often directly affects the drilling quality, drilling efficiency and drilling cost. With the development of oil drilling technology, oil wells are also gradually developing towards diversification. When drilling horizontal wells and directional wells, deflection is essential, which requires a series of measures to facilitate drilling deflection. Conventional drills have a drill shank of 100 to 200 mm between the drill crown and the threaded connection. The drill shank is used for slotting to install the drill. figure 1 A schematic diagram of a conventional drill bit in the prior art is shown, which includes a crown body 1, a threaded co...

Claims

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