Horizontal well fastener-unlatching salvaging device and fastener-unlatching salvaging method thereof

A fishing device and horizontal well technology, which is applied in the direction of earthwork drilling, wellbore/well parts, etc., can solve the problems of unblocking in horizontal wells, solve eccentric wear sidetracking and safety problems, reduce friction, and improve work efficiency. efficiency effect

Active Publication Date: 2008-03-26
DAQING OILFIELD CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the horizontal well cannot be unstuck by using the repai

Method used

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  • Horizontal well fastener-unlatching salvaging device and fastener-unlatching salvaging method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0006] Specific embodiment 1: (see FIG. 1 ) the horizontal well jam release and fishing device in this embodiment consists of a milling tool 1, a safety joint 2, a power drilling tool 3, a first centralizer 4, a straight screw 5, a second centralizer 6, The inclined drill pipe 7, the weighted drill pipe 8 and the drill pipe 9 are composed. One end of the milling tool 1 is connected with one end of the safety joint 2, and the other end of the safety joint 2 is connected with one end of the power drilling tool 3. The power drilling tool 3 The other end of the first centralizer 4 is connected to one end of the first centralizer 4, the other end of the first centralizer 4 is connected to one end of the straight screw 5, the other end of the straight screw 5 is connected to one end of the second centralizer 6, and the second The other end of the centralizer 6 is connected with the lower end of the inclined drill pipe 7 , the upper end of the inclined drill pipe 7 is connected with t...

Example Embodiment

[0007] Specific embodiment 2: (refer to FIG. 1 ) the horizontal well removal and salvage method of the present embodiment is realized by the following steps: firstly, the composite driving, grinding, milling and unlocking pipe string is run down, and the milling tool 1 reaches the upper part 1 of the fish head (well drop). ~2m, start circulating workover fluid, and the displacement of workover fluid is 0.4~0.6m 3 / min, the pump pressure is 10 ~ 13Mpa, gradually lower the composite drive, milling, and release the stuck pipe string to the fish head, until the sand in the upper part of the falling object (fish head) is washed clean, the power drilling tool 3 starts to work and drives the lower part. The milling tool 1 starts to work; at the same time, the turntable is started to make the drill pipe 9 drive the weighted drill pipe 8 and the slope drill pipe 7 to start working. The rod 7 is driven at the same time, that is, the compound drive; in the process of drilling, grinding a...

Example Embodiment

[0008] Embodiment 3: The displacement of the workover fluid in this embodiment is 0.5m 3 / min. Others are the same as in the second embodiment.

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Abstract

The present invention is jamming eliminating and junk fishing apparatus and process for horizontal well. The jamming eliminating and junk fishing apparatus has one milling tool, one safety joint, one powered boring tool, one slope drill pipe and one heavy wall drill pipe connected successively. The jamming eliminating and junk fishing process includes setting the milling tool to 1-2 m above the fish head, delivering well repairing fluid in the displacement of 0.4-0.6 sq m/min and pump pressure of 10-13 MPa, and initiating the powered boring tool to drive the milling tool. The present invention can eliminate jamming in and fishing junk from horizontal well effectively.

Description

technical field [0001] The invention relates to a downhole jam-free fishing device and a jam-free fishing method thereof. Background technique [0002] With the increase in the number of operations such as fracturing, perforating, acidizing, water search, water plugging, and production logging in horizontal wells, it is inevitable that various pipe strings or instruments will be stuck and disconnected. Due to the particularity of horizontal wells in terms of large borehole curvature in the curved section and large well inclination angle (generally about 90 degrees) in the horizontal section, there are mainly the following technical difficulties in the implementation of unblocking salvage and workover operations: ① Fish falling into the well (well The common name for falling objects, such as pipe strings, cables, wire ropes, instruments, tools, etc.) is close to the lower side of the casing wall, and it is difficult to introduce and trim the fish head; The selection of metho...

Claims

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Application Information

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IPC IPC(8): E21B31/16
Inventor 刘合兰中孝张国良艾教银余龙
Owner DAQING OILFIELD CO LTD
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