Sand washing tool assembly and sand washing device thereof
The invention relates to a sand washing tool assembly and a sand washing device thereof. When the sand washing tool assembly is utilized to wash sand, first high-pressure sand washing liquid is injected into a working chamber through a continuous oil pipe inner pipe, an orifice check valve is opened...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention relates to a sand washing tool assembly and a sand washing device thereof. When the sand washing tool assembly is utilized to wash sand, first high-pressure sand washing liquid is injected into a working chamber through a continuous oil pipe inner pipe, an orifice check valve is opened under the pressure of the high-pressure sand washing liquid in the working chamber to enable the high-pressure sand washing liquid to be sprayed out from an orifice to wash sand hardened in a well to form mixed sand liquid, the mixed sand liquid returns to the ground through an annular channel between the continuous oil pipe inner pipe and an continuous oil pipe outer pipe during sand washing and is prevented from entering a stratum from a through hole in a sleeve, and the problem of stratum pollution is solved.
本发明涉及种冲砂工具组件及其冲砂器。使用本冲砂工具组件冲砂时,先通过连续油管内管向工作腔中注入高压冲砂液,喷孔单向阀在工作腔中的高压冲砂液的压力下打开使高压冲砂液从喷孔中喷出对井中板结的泥砂进行冲洗形成混砂液,冲砂时混砂液从连续油管内、外管之间的环形通道返回地面,避免了混砂液从套管的通孔中进入地层,解决了因此造成的地层污染的问题。 |
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