Ball-dropping sliding sleeve with a removable ball seat
US10494901B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2017 |
| Grant date | Dec 3, 2019 |
| Priority date | — |
| Expiry date | Feb 1, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A ball-dropping sliding sleeve with a removable ball seat, comprising an outer barrel (1), an inner sliding sleeve (6) and a removable ball seat assembly; an inner ring downward facing shoulder (2) is disposed at an upper end of the outer barrel (1), a lower joint (3) is fixedly mounted in a lower end of the outer barrel (1), a sliding groove (4) is formed in the outer barrel (1) between the downward facing shoulder (2) and the lower joint (3), and at least one fracturing lateral hole (5) is distributed on a circumference of the outer barrel (1) at an upper side of the sliding groove (4). The structure of the present invention is reasonable and compact, and its usage is convenient. Through the coiled tubing, a connecting sleeve (10), a ball seat sleeve (7) and a ball seat (15) which are located inside the inner sliding sleeve (6) can be lifted up and taken out, which widens the inner channel of the sliding sleeve, eliminates the restriction of the inner diameter of the ball seat (15), and facilitates the post-processing of the complex situations; the pressure relieving channel formed by the pressure relieving holes in the ball seat (15) and the ball seat circular groove (17) can re…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.