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A ball-throwing multiple excitation bypass valve

A technology of multiple excitations and bypass valves, which is applied in wellbore/well valve devices, wellbore/well components, buildings, etc., can solve the problems of time-consuming tripping and insufficient protection of downhole tools. The effect of reducing the overall length and saving non-production time

Active Publication Date: 2021-07-13
BAOJI PETROLEUM MASCH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a ball-throwing multiple-activation bypass valve, which solves the problems in the prior art that the plugging and well-washing operations consume time for tripping and the protection of downhole tools is not in place.

Method used

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  • A ball-throwing multiple excitation bypass valve
  • A ball-throwing multiple excitation bypass valve
  • A ball-throwing multiple excitation bypass valve

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0052] Operation example 1: Connect the tool of the present invention to the downhole drilling tool assembly. During normal drilling, the bypass hole 701 is not opened, and its function is equivalent to that of the drill collar or drill pipe, that is, the central circulation working mode 501, and the drilling fluid is all pumped by the tool. The center flows through to the bottom bit borehole and returns to the annulus to surface equipment. At this time, the position of the transposition pin 8 is in the gD position of the central circulation stroke groove 5031.

[0053] Operation example 2: When encountering a lost formation or an extended-reach horizontal well section during drilling and completion, unload the drill pipe on the drilling platform, put in the first steel ball 1 and tighten the drill pipe, and the steel ball 1 uses its own weight or The drilling fluid pumped in by the drilling pump is carried to the first jaw structure 301 of the upper sliding sleeve 3 to block ...

example 3

[0054] Operation example 3: When there is no need for excessive displacement to pass through some downhole tools but still requires large displacement circulation to flush the well or small displacement to stop leakage, the second steel ball 1 can be put in again, and the steel ball 1 moves to slide upward The first claw structure 301 of the sleeve 3 blocks the center, and the pump is turned on to suppress the pressure, causing the upper sliding sleeve 3 to push the wear-resistant sleeve 4 and the transposition piston 5 to move, and the transposition pin 8 starts from the position of eC in the transposition groove 503 Move, when the first claw structure 301 of the upper sliding sleeve 3 reaches the first expansion structure 603 of the upper limit cylinder 6 and then opens, at this time, the transposition pin 8 moves from position eC to dA in the transposition groove 503, After the first claw structure 301 is opened, the steel ball 1 is carried by the drilling fluid to the second ...

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Abstract

The invention discloses a ball-throwing multiple-activation bypass valve, which belongs to a downhole operation tool while drilling. Mainly used for plugging while drilling or well cleaning operations, specifically including steel balls, upper joints, upper sliding sleeves, wear-resistant sleeves, transposition pistons, upper limit cylinders, main housings, transposition pins, thrust bearings, and upper springs A lower sleeve, a lower spring, a lower limit cylinder, a ball basket and a lower joint. The bypass valve can periodically open or close the bypass channel according to the needs of drilling and completion operation conditions by throwing balls to hold pressure, so as to realize the change of local circulation flow and direction, and complete three kinds of work: central circulation, bypass circulation and split circulation Mode switching, so as to complete the plugging or well flushing operation under the premise of drilling while drilling, saving non-production time; protect the tools that are sensitive to solid phase erosion or have limited flow rate below.

Description

technical field [0001] The invention belongs to the technical field of oil and gas drilling and completion, and in particular relates to a ball-throwing multiple activation bypass valve. Background technique [0002] In the development process of oil and gas drilling and completion, there are two typical operation requirements: the first is the need for large displacement plugging operation. Under normal circumstances, the input flow and output flow of mud circulation are roughly equal during the drilling process, which ensures the healthy operation of the entire circulation system just like blood. However, leakage is often encountered in some complex formations, resulting in a large reduction in the flow of mud returning to the ground or No return, especially in the pre-drilling process of natural gas wells, "plugging" and "preventing leakage" are high-frequency words in drilling logs. Mud has positive functions such as cleaning the wellbore, cooling the drilling tool, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B34/08E21B34/14
CPCE21B34/08E21B34/14E21B2200/04E21B2200/06
Inventor 左永强王德贵游娜敬幸福蒲学川符晓
Owner BAOJI PETROLEUM MASCH CO LTD