What is 8rd thread?

For a thread pitch p, the crest and root rounding radius is slightly less than p/4, and approximately the middle third of each thread flank is flat. The American Petroleum Institute (API) specification 5B lists a “round thread” for tubing, often referred to as “8 round” or “8rd” for 8 threads per inch.

What is LTC thread?

LTC (Long Thread) type. It is also has a non-runout design of round thread. Each has eight round crested thread per inch, which is same as the STC type. LTC thread is easy to process, good tightness, strong connection strength, simple maintenance and low price.

What does 8 round mean?

2017.04.28. The most common type of casing connection in use is the API 8-rd connection, where 8-rd means 8-round or eight threads per inch and a slightly rounded profile. The profile is a V or wedge-shape but slightly rounded at the crest and valleys of the threads.

What are the different type of couplings thread used in tubing string?

API connections: API proposes two types of coupling: Non-Upset coupling (NU) and External Upset coupling (EU): External Upset coupling (EU): with an increased wall thickness and diameter (called Upset) giving better tensile strength. It is called External Upset End (EUE).

What is BTC pipe?

Also known as: Baku-Tbilisi-Ceyhan pipeline. BTC is a major crude oil pipeline that brings Caspian crude to the Mediterranean. The pipeline starts in Baku, Azerbaijan, passes through Tbilisi, Georgia, and terminates on the Southeastern coast of Turkey, in Ceyhan.

How do I identify a drill pipe thread?

Most threads can be identified using three primary measurements and by viewing the thread form or shape of the thread.

  1. Pin Length: measured from the base of the thread to the tip.
  2. Shoulder Diameter: diameter of the base of the pin (male) or box (female).

What is STC and LTC?

What is STC and LTC in casing pipe? STC is a good choice for shorter length casing applications that do not involve high axial loads or bending. LTC is well suited for situations where some axial load is encountered but overall well conditions do not include extremes of temperature or pressure.

What is BTC in casing?

BTC (Buttress threading) This thread is designed to improve axial tensile or axial compressive load capacity and to provide leakage resistance. LTC, STC and BTC are the same in appearance, how to distinguish them that depends the outside diameter and application.

Has there ever been a 10-10 round in UFC?

And for the record, none of the three judges scored that round 10-10. Nothing happened in the first five minutes of that fight. According to Fightmetric, each welterweight landed five total strikes, which might be generous. Nothing significant landed, and there was no grappling whatsoever.

Has there ever been a 10-7 round in UFC?

Petz made his UFC debut at Ultimate Fight Night 6 against Sammy Morgan. He won via unanimous decision with one of the judges scoring the fight 30-23 including one of the only 10-7 rounds in UFC history. This is the most lopsided scorecard for a three-round fight in UFC history.

What is an EUE connection?

The API external-upset-end (EUE) tubing connection is widely used because it is a good, serviceable connection in most wells. The EUE joint has a designed joint strength in tension and pressure strength greater than that of the pipe body and, therefore, is considered a 100% joint efficient connection.

What is premium thread connections?

Premium and Semi-Premium connections are a class of high-performance thread profiles that are used in today’s more sophisticated completions. Premium threads are available in a number of configurations and are typically designed to provide performance beyond standard API connections.