Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Retraction system for a latching mechanism of a tool










Image Number 10 for United States Patent #6059053.

A retraction system allows disengagement of retrieval latch dogs of a down hole running tool from a bit locking sleeve. The locking sleeve is slidably retained within a drive sub and includes a pair of slots which are engaged by the retrieval latch dogs when the tool is used to retrieve bit segments from the drive sub. The retraction system includes a sleeve which is slidably mounted on a main body of the tool and spring which is biased to push the sleeve over the retrieval latch dogs. The sleeve has a pair of diametrically opposed slots through which the retrieval latch dogs can extend for contacting the inner surface of the drive sub. The retraction system also includes a length of the inner surface of the drive sub which is made of progressively reducing diameter in the direction of retraction of the tool from the drive sub. The upper end of each slot is provided with a bevel for directing the retrieval latch dogs in the inward direction. To withdraw the tool from the drive sub, the retrieval latch dogs are disengaged from the bit locking sleeve by the combined action of the shape of surface portion which acts to push the retrieval latch dogs inwardly, together with the force of spring and the beveled surfaces which act to push the sleeve over the retrieval latch dogs thereby disengaging it from the bit locking sleeve.








 
 
  Recently Added Patents
Provider edge bridge with remote customer service interface
Image processing apparatus and method
Concept-structured image search
Thin film transistor with increased doping regions
Circuit switched fallback for mobile terminated calls
Method for solubilising, dispersing and stabilising of substances, products manufactured according to the method as well as the use thereof
Egg shaped cremation urn
  Randomly Featured Patents
Inkjet printing apparatus and cleaning control method therefor
Site-specific inhibitors of histone methyltransferase (HMTASE) and process of preparation thereof
Human chorionic peptidase-1
Low-power hand-held transaction device
Method for styling hair using a flat disk
Controlled release cytotoxic agent compositions and methods for the treatment of otic disorders
Modularized light processing of body components
Force transducer range adjuster
Multi-stage cooking system using radiant, convection, and magnetic induction heating, and having a compressed air heat guide
Measuring instrument for the profile of piled charge of a blast furnace