Apparatus for lifting heavy equipment
US5116095A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 16, 1991 |
| Grant date | May 26, 1992 |
| Priority date | — |
| Expiry date | Jan 16, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Running tool apparatus for lifting heavy equipment such as diverters and other devices utilizing a drilling rig drawworks. The running tool has a slotted discs and pins mechanism to cause engaging dogs to engage and disengage the heavy equipment when rotational force is applied. A keeper assembly mounted at the top of the running tool keys into an impression at the top of the heavy equipment to secure the outer body of the running tool with respect to the heavy equipment. The inner body is sealed with respect to the outer body and the tool is shaped so that the heavy equipment can be pressure tested with the running tool engaged in the bore of the heavy equipment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.