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US 2021/0010331 A1Published application
Downhole Motor that Improved Thread Fastening Structure
AssigneeSandong Metal Industry
InventorSUK SOO CHANG
Life of this patent
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Abstract
A downhole motor having an improved thread fastening structure is proposed. In the downhole motor, a thread structure disposed therein and having ridges formed at both end portions at a predetermined distance from ends is improved and the internal structures of a first coupler and a second coupler in which the end portions of the thread are respectively inserted and fastened are improved to correspond to the end portions of the thread, thereby being able to improve sealing ability.
Claims4
A downhole motor having an improved thread fastening structure to be used for drilling at an oil field, the downhole motor (10) comprising:
- a thread (100) having a hole therein formed through a first end and a second end and having ridges (102) formed on outer surfaces of a first end portion and a second end portion at predetermined distances respectively from the first end and the second end;
- a first coupler (110) having a mud inlet (111) formed with a predetermined depth from a first end, having a first close-contact surface (112) and first grooves (113) that are sequentially formed from the inlet (111) to correspond to the first end portion of the thread (100), and having a first coupling inlet (114) formed from the first grooves (113) to a second end to insert the thread (100) therein;
- and
- a second coupler (120) having a second coupling inlet (121) formed with a predetermined depth from a first end to insert the thread (100) therein, and having second grooves (122) and a second close-contact surface (123) sequentially formed from the second coupling inlet to a second end to correspond to the second end portion of the thread (100).
1 more element
Dependencies are inferred from the claim text.