| 摘要 |
<p>Formation injection tool (10) disposable in production well casing (C) includes upper intake flow control assembly (24), middle seal mechanism (26), and lower discharge flow control device (28). Upper intake flow control assembly (24) is attached to a lower end of pump (12) extending downward within well casing (C) past and below upper productive formation (P). In response to upstroke of pump (12), upper intake flow control assembly (24) permits one-way flow of undesired heavier fluid, such as water, from upper productive formation (P) downwardly and into upper intake flow control assembly (24) concurrently as desired lighter fluid, such as oil and/or gas, flows from upper productive formation (P) upwardly within well casing (C) to ground surface (G). Middle seal mechanism (26) establishes a closure seal within well casing (C) between upper productive formation (P) and lower disposal formation (D). In response to downstroke of pump (12), lower discharge flow control device (28) permits only one-way flow of the undesired heavier fluid from upper intake flow control assembly (24), downwardly through middle seal mechanism (26), and from lower discharge flow control device (28) to lower disposal formation (D).</p> |
