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Multi-stage fisher with dimension unknown inner pipe

An overshot and size technology, applied in wellbore/well components, earthwork drilling, etc., can solve problems such as delaying drilling time, delaying oil and gas exploration progress, etc., and achieve the effect of reducing labor intensity, simple structure, and speeding up progress

Inactive Publication Date: 2013-11-06
新疆派特罗尔能源服务股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the size of the wellbore is limited, and when it is impossible to fish from the outside, it is possible to continue drilling by grinding and milling dropped objects due to lack of suitable fishing tools
This not only delays a lot of drilling time, but also delays the progress of oil and gas exploration

Method used

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  • Multi-stage fisher with dimension unknown inner pipe

Examples

Experimental program
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Effect test

Embodiment Construction

[0010] like figure 1 As shown, a multi-stage overshot with an unknown inner tube size is mainly composed of a drill tool joint 1, a first-level outer-opening window clamping body 2, a second-level outward-opening window clamping body 3, and a drilling tool joint centralizing block 4.

[0011] The drilling tool joint 1 is connected with the first-level outward opening window clamping body 2 with threads, the first-level outward opening window clamping body 2 and the second-level outward opening window clamping body 3 are also connected with threaded screws, and the drilling tool joint centralizing block 4 Mounted on drill joints.

[0012] Because there is a centralizing block on the tool joint 1, the lower part of the clamping body 3 of the second-stage outward opening window is in a streamlined shape. , the streamlined outside-opening window clamp body 3 is very easy to straighten and enter the falling objects, and the clamps on the outward-opening window clamp body 3 are squ...

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Abstract

The invention discloses a multi-stage fisher with a dimension unknown inner pipe, which is characterized in that a drilling tool connector is connected with a screw thread for a first-stage outward opening window chuck plate body, wherein the one-stage outward opening window chuck plate body is connected with a second-stage outward opening window chuck plate body through the screw thread. Outward opening window chuck plates are arranged at the peripheries of all outward opening window chuck plate bodies, the lower part of the lowest-stage outward opening window chuck plate body is a streamline and is provided with a water channel, a wiper block is embedded in the drilling tool connector, the lower part of the outward opening window chuck plate body in the lowest stage takes the shape of a streamline, when the outward opening window chuck plate body in the lowest stage reaches a fishing part and is aligned with a central tube superposed on a lifting object to exert certain bit pressure, the streamline outward opening window chuck plate body can be stabilized easily and enters the lifting object, and chuck plates on the outward opening window chuck plate bodies can be squeezed into the lifting object to form one-stage fishing. The fishing dimension and the length of the outward opening window chuck plate bodies can be adjusted or replaced according to general size and specific conditions of an object to be fished, and the density and the arrangement of the outward opening window chuck plate bodies can be adjusted according to specific shape of the object to be fished.

Description

technical field [0001] The invention relates to the salvage of two or more superimposed irregular and special tubular falling objects with unknown internal dimensions during the oil drilling process. Background technique [0002] In the process of oil drilling, when two or more superimposed irregular special tubular falling objects with unknown internal dimensions (such as oil pans falling into the well) are salvaged with tools such as slips, the specific internal size of the falling objects is unknown. , and are two fallen objects superimposed together and are not easy to salvage. In addition, when the borehole size is limited and cannot be fished from the outside, it is possible to continue drilling by grinding and milling dropped objects because there is no suitable fishing tool. This not only delays a lot of drilling time, but also delays the progress of oil and gas exploration. Contents of the invention [0003] In view of the above-mentioned problems, the object of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B31/20
Inventor 慕武武波盛勇华长生陶世军赵瑞明陈军王春生田长青朱轶
Owner 新疆派特罗尔能源服务股份有限公司
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