DOUBLE PACKER DEVICE
To provide a double packer device capable of achieving stable operation when switching a packer part from a bulging position to a non-bulging position.SOLUTION: A double packer device 1 is accommodated in a movable manner along the central axis of an injection outer tube 8 with respect to the inject...
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Main Authors | , , , |
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Format | Patent |
Language | English Japanese |
Published |
14.04.2022
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Subjects | |
Online Access | Get full text |
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Summary: | To provide a double packer device capable of achieving stable operation when switching a packer part from a bulging position to a non-bulging position.SOLUTION: A double packer device 1 is accommodated in a movable manner along the central axis of an injection outer tube 8 with respect to the injection outer tube 8. The double packer device 1 is configured to discharge a chemical solution from a discharge port 11 at any position in the direction of the central axis. The double packer device 1 includes: an injection pipe 10 having a discharge port 11; a pair of packer units 2 provided at both sides in the central axis direction with respect to discharge port 11 in injection pipe 10; and a drive unit 4. The drive unit 4 is provided to the injection pipe 10 and is configured to switch each of the pair of packer units 2 between the bulging position that comes into contact with the inner peripheral surface of the injection outer tube 8 and the non-bulging position separated from the inner peripheral surface. The drive unit 4 has a moving part 42 to switch t at least one of the packer parts 2 from the bulging position to the non-bulging position by moving along the central axis in one direction.SELECTED DRAWING: Figure 8
【課題】パッカー部を膨出位置から非膨出位置に切り替える際に、安定した動作が得られるダブルパッカー装置を提供する。【解決手段】ダブルパッカー装置1は、注入外管8に対し当該注入外管8の中心軸に沿って移動可能に収容され、中心軸方向の任意の位置で吐出口11から薬液を吐出可能なダブルパッカー装置1である。ダブルパッカー装置1は、吐出口11を有するインジェクションパイプ10と、インジェクションパイプ10における吐出口11に対する中心軸方向の両側に設けられた一対のパッカー部2と、駆動部4と、を備える。駆動部4は、インジェクションパイプ10に設けられ、一対のパッカー部2の各々を、注入外管8の内周面に当たる膨出位置と内周面から離れる非膨出位置とで切り替える。駆動部4は、中心軸方向に沿って一方向に移動することで、少なくとも一つのパッカー部2を膨出位置から非膨出位置に切り替える可動部42を有する。【選択図】図8 |
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Bibliography: | Application Number: JP20200167965 |