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The liner hanger assembly is a special cementing tool for tieback operation.
Tieback equipment allows existing liners with a receptacle to be extended to the surface or farther up hole, and provides a high-pressure seal at the top of a cemented or uncemented liner. TIW offers variety of tieback seal nipples and tieback packers to accommodate liner top extension and remedial operations.
Tieback Procedures of Hydraulic Liner Hanger Tie-Back Assembly
A. Preparation before casing
Measure and drift the casings carefully and clean all the threads.
Calculate the kelly-up of the casing (the particular part of the last casing which is above the rotary table) and arrange the casing string.
Prepare several casings, which are approximately 0.5m shorter than the others and convenient for kelly-up calibration. (The actual kelly-up is not equal to the calculated value due to measurement error and the remaining threads of the casings.)
B. Polishing the polished bore receptacle
Connect the milling shoe and trip in. Polish the inner surface of the polished bore receptacle, make sure there is no debris.
Note the depth of the milling shoe when it reaches the top of the seal assembly (judge from the changes on pressure and WOB). Then lift the drill string for 1m.
Use a drilling rate of 40～50rpm and a normal flow rate. Slowly lower the drill string. Polish the inner surface of the polished bore receptacle twice or three times. Each time polish 3～4min. During the last polishing, apply an additional load of 2～3t when the torque suddenly increases (the milling shoe reaches the top of the seal assembly) during the last polishing. Polish for another 2~3min and note the depth of the milling shoe, which is an important clue for the casing setting depth.
Circulate with high flow rate for 5min.
Trip out and check the milling shoe. If there is a circle of polished trace and the diameter is equal to the I.D. of the left thread on the seal assembly, then the milling shoe have reached the bottom of the polished bore receptacle.
Features of Hydraulic Liner Hanger Tie-Back Assembly
With the guide shoe and circulate bore, it can stab into polished bore receptacle before cementing, more convenient than conventional cementing which pumps down cement before stabbing.
With its streamline shape, the guide shoe can stab into polished bore receptacle easily.
The Tieback Seal Assembly with three stacks of molyglass seal is designed for high-pressure and high-temperature liner tieback completions. Available in seal length is 1.2m.
Technical Parameters of Hydraulic Liner Hanger Tie-Back Assembly
Specifications, mmΦ177.8Φ127.0
Sealing capacity, MPa2525
Heat-proof Rating, ℃120120
Available Sealing Length, mm12001200
I.D., mmΦ155Φ108
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Elevating Transfer Vehicles (ETV) is being assembled at Arlanda Airport, Sweden.
These machines handle the air cargo containers, ULD (Unit load device).
Photos was taken in 2010.
19th Summit of the African Union-
Opening of the Ordinary Session of the Assembly of the Union
15 July 2012
19th Summit of the African Union-
Opening of the Ordinary Session of the Assembly of the Union
15 July 2012
A snapshot taken during the Assemblies of WIPO Member States, which met from October 2-11, 2017.
Copyright: WIPO. Photo: Emmanuel Berrod. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 IGO License.
Catalog #: 10_0011228
Date: 1965-1975
Title: Convair/General Dynamics Plant and Personnel
Corporation Name: Convair/General Dynamics
Additional Information: Vehicle Assembly
Tags: Convair/General Dynamics Plant and Personnel, Vehicle Assembly, 1965-1975, Convair/General Dynamics
Repository: San Diego Air and Space Museum Archive
A snapshot taken during the Assemblies of WIPO Member States, which met from September 24 to October 2, 2018.
Copyright: WIPO. Photo: Emmanuel Berrod. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 IGO License.
AVR Assembly CookBook
Changed Layout to support external Interrupt input.
Supports 3 LEDs as "Light Chain" the same way as Layout A did.
IMPORTANT: In this setup the Breadboard is rotated 180 degree against Layout "A". This mirrors the power line assignment.
I'm sorry for this, but its a side effect of the development. Sometimes somethings changes.
The chamber in which some of America's most revered figures met, debated, and argued while creating the two most important documents in America's history. The chair at the front is the original chair where George Washington sat. It is the half-sun carved into head of the chair which prompted the famous quote by then 81 year old Benjamin Franklin:
I have often looked at that behind the president without being able to tell whether it was rising or setting. But now I... know that it is a rising...sun.
One of the most, if not the most historically significant structure in the United States, the old Pennsylvania State House became the birthplace of American independence in 1776. The main complex, built in 1753, became the meeting place for the Continental Congress and the Constitutional Convention--the Declaration of Independence and US Constitution were both drafted and signed here. The building is now part of the National Park Service and has been an UNESCO World Heritage Site since 1979.
Independence Hall. Philadelphia Pennsylvania.