Slant device capable of recovering and fishing tool thereof
A deflector and fishing cup technology, which is applied in drilling equipment, drilling equipment and methods, wellbore/well components, etc., can solve the problems of unreliable fishing and inaccurate positioning of the deflector, and is conducive to accurate judgment. , the effect of increasing reliability and accurate and reliable positioning
Inactive Publication Date: 2008-12-10
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology
[0005] The invention solves the technical problems of inaccurate positioning and unreliable fishing of the oblique device in the prior art. The purpose of the oblique locator and its fishing tool provided by the invention is to improve the positioning accuracy of the oblique device and the fishing of the fishing tool. Reliability, and the skewer is recyclable, which greatly saves production costs
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[0022] The present invention relates to a retrievable skewer and fishing tools thereof, such as figure 1 Shown is the front view of the skewer, which is composed of an upper body 3 and a lower body 5. At the junction of the upper body 3 and the lower body 5, a debris fishing cup 4 is sleeved. The fishing cup 4 The mouth of the cup faces the upper body 3, and the upper body 3 and the lower body 5 are threadedly connected. This connection is also convenient for adjusting the length of the skewer; wherein the upper body 3 is provided with a connecting portion connected with the drill rod, In the structure of the present invention, the drill rod and the upper body 3 of the skewer are connected by a pin 1, and a salvage groove 2 is provided on the upper body 3. In this embodiment, the salvage groove 2 is a dovetail-shaped groove. A wedge-shaped groove or the like can be used according to actual needs; the lower body 5 is provided with an elastic element at the end close to the fish...
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The invention is a recoverable inclined organ, comprising a main body which comprises upper and lower main bodies fixed with each other, where their junction is provided with a salvage cup whose mouth is opposite to the upper main body, the upper body is provided with a connection part connected with a drill rod and a salvage tank between the connection part and the salvage cup, and the lower main body is provided with a guiding incline above which there is an elastic component and below which there is a guiding key. The salvage tool for the inclined organ comprises salvage rod and salvage hook, where the salvage hook is fixed with the salvage rod, the upper part of the salvage rod is a connection end actively connected with the drill rod and the connection end is also provided with a nozzle to speed up fluid flow.
Description
technical field [0001] The invention relates to the field of oil drilling, in particular to a skewer and a fishing tool mainly used in sidetracking construction of multi-branch wells for oil drilling. Background technique [0002] At present, in drilling operations, branch well tools are indispensable in the sidetracking construction of multi-branch wells. Whether the skewer can be salvaged and recovered smoothly depends on the success or failure of the branch well operation and the length of the operation cycle. At present, there are no very reliable products for the skewers and fishing tools used. In branch well operations, once the skewers cannot be salvaged and recovered smoothly, the main wellbore will inevitably fail to connect. The commonly used method is to use a milling skewer, but this kind of operation often faces the problems of long time consumption and high risk. Once the skewer fails to be recovered or milled, the wellbore below the skewer will be scrapped an...
Claims
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IPC IPC(8): E21B7/08E21B31/00
Inventor 方可炎菅志军张玉霖许朝晖兰洪波
Owner CHINA NAT OFFSHORE OIL CORP