| 摘要 |
A multi-acting downhole tool arrangement (100), (400), (500) includes a tubular (102) and an actuatable sliding member (104), (404), (504) radially disposed relative to the tubular (102) in a radial sealing relationship. The tubular (102) and the member (104), (404), (504) are arranged relative to one another in a non-slidable first configuration. The sliding member (104), (404), (504) and the tubular (102) cooperate to define a chamber 116 therebetween. At least a pair of seals (108), (110), (410), (446) delimits the chamber (116). A first one (110), (446) of the pair of seals is a degradable seal. Upon actuation of the sliding member (104), (404), (504), the sliding member (104), (404), (504) slides in a first direction relative to the tubular (102) to a second configuration where the degradable seal (110), (446) is exposed to a condition that degrades the degradable seal (110), (446). Degradation of the degradable seal (110), (446) opens a passage to the chamber (116) such that fluid enters the chamber (116) and urges the sliding member (104), (404), (504), in a second direction relative to the first direction, to a third configuration. |
| 主权项 |
1. A multi-acting downhole tool arrangement comprising:
a tubular; an actuatable sliding member radially disposed relative to the tubular in a radial sealing relationship, the tubular and the sliding member being arranged relative to one another in a non-slidable first configuration, the sliding member and the tubular cooperating to define a chamber therebetween; and at least a pair of seals delimiting the chamber, a first one of the pair of seals being a degradable seal; wherein, upon actuation of the sliding member the sliding member slides in a first axial direction relative to the tubular to a second configuration and as a result of the sliding of the sliding member to the second configuration the degradable seal is exposed to a condition that degrades the degradable seal, and degradation of the degradable seal opens a passage to the chamber such that fluid enters the chamber and urges the sliding member in a second axial direction relative to the tubular to a third configuration. |
