Would you like to start a free subscription?
Remember me | Forgot password
For full content view: Log in Now!
Impression blocks, a.k.a. “confusion” blocks, have been around since people first started running any tool in a well. This simple device is designed to reveal the identity, size and shape of the top of a “fish,” any piece of equipment left in a hole that should be removed. These fish can range from pieces of broken pipe, to tools that have been dropped, to sand or scale fill in the bottom of the hole. The impression block has long been used to identify what the fish is and what needs to be done to remove it from the hole.
Impression blocks are simple devices. A piece of a soft metal, usually lead, about ⅜-in. (10-mm) thick, is mounted on a steel carrier block. The lead or babbitt is generally melted, poured into a mold that includes the block and filed or polished until it is circular with the same OD as the block with a flat face.
This area of the site is restricted.
In order to gain access, please either Log
In, or subscribe to World Oil.
Two options are available to you for creating an account.
1. Get a Free Trial Subscription to World Oil Magazine and gain immediate access to select content on World Oil Online.
Start a Free Trial Subscription and gain immediate access to the complete current issue of World Oil Magazine. Plus, you’ll receive 3 upcoming issues of World Oil Magazine in print or digital format.* You also receive access to the Energy Events Calendar, Industry Statistics and WO Wire’s news and industry coverage.
2. Purchase a subscription to World Oil magazine and gain immediate
and complete access to World Oil Online. As a Total Access subscriber
you will have access to all areas of the site available to registered users and
free subscribers as well as having access to such premium content areas as:
Physical copies of this content may be available for purchase. Visit the Reprints & Back Issues section.
If you are already a paid subscriber and do not have access, please email CustomerService@worldoil.com.
World Oil's specialized upstream Engineering Data Tables featuring the Drill Bit Classifier, Tubing Tables and more. Get Total Access today.
Houston, TX - November 4-5
All material subject to strictly enforced copyright laws.
© 2014 World Oil. © 2014 Gulf Publishing Company.