Petroleum instrument hoisting system and hoisting head
US9938790B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 21, 2015 |
| Grant date | Apr 10, 2018 |
| Priority date | — |
| Expiry date | Jun 23, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B31/125
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention discloses a petroleum instrument hoisting system and a hoisting head, which is used for hoisting a petroleum instrument. The hoisting head includes: a lifting part, for connecting a lifting rope; an insertion rod, which is located under the lifting part and used for protruding into a stair-shaped hoisting hole, and is set with a notch on both sides thereof; a insertion head, which is connected with the insertion rod via a connecting rod, wherein the insertion rod is set with a slide opening that is in sliding fit with the connecting rod, and the lateral surface of one end of the insertion rod that is adjacent to the connecting rod is a conical surface; a coniform extension spring, which is sleeved on the insertion rod and the connecting rod, wherein one end thereof with a large cross-sectional area is sleeved on the insertion rod, and the other end thereof with a small cross-sectional area is sleeved on the connecting rod and is fixed relative to the connecting rod; two clamping pieces, which are respectively hinged in two notches, and the clamping face thereof can be in hooking fit with a hooking face in the horizontal plane; two pulling ropes, which are resp…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.