In the junior year, the editor of the school newspaper gave me a close-up of the campus news. I asked me to interview the student in the student dormitory. After one night of self-study, I flowed out of the dormitory as people rushed out of the classroom. Several girls at the front walked and chatted. I caught up and stopped them and told them that I was a school newspaper reporter and asked how many of them were hanging curtains. Why do we need curtains? They were a bit embarrassed. One of the girls said: "In order to keep their secrets from being discovered by others."
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I asked her what secret. She said: "Since it's a secret, I can't tell you." I wrote down her words and chatted with them for a long time. I got a lot from this interview. After the article was published, it caused a great response on the campus. My name is also familiar to many students.
Soon afterwards, the brothers who slept in my upper store suddenly came to introduce me to a girl in the same dormitory as his daughter. At that time, I was always busy learning to write. I always thought that falling in love was a waste of time.
The other brothers in the dormitory said, "Are you afraid that girls will not see you?" I tried to refute them and tried to prove that I just didn't want to talk. The source said: "Can you prove it to us? Can you make a bet?" My good intentions were inspired, so we clap for the bet.
According to the time agreed upon by the source, on a full moon night, we met on the gloomy avenue. The girl had long hair and was delicate and slender. We walked in the moonlight, talked while walking, and from their respective professions to the anecdotes of the dormitories, the atmosphere was harmonious and warm.
Naturally, I talked about the close-up that I made in the school newspaper. I asked her what kind of situation was in my article. She chuckled and said: "For the sake of my own secrets are not found." I looked at her in surprise, and found that she was the girl I interviewed a few days ago.
Because I shouldered the task of gambling, I was eager to succeed. I immediately made a request to make friends. The girl's face was blushing, and she didn't talk for a long time. Looking at her hesitant, I missed the opportunity to add a sentence: "Miss me you will regret it."
After listening to this, the girl giggled. When I broke up, I asked whether she could go out and watch a movie on the weekend. She thought for a while, agreed to me, and asked me to call her downstairs in the girls.
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Casing is a large-diameter pipe that serves as the structural retainer for the walls of oil and gas wells or wellbore.
It is inserted into a well bore and cemented in place to protect both subsurface formations and the wellbore from collapsing and to allow
drilling fluid to circulate and extraction to take place
The oil casing is a steel pipe used to support the well wall of oil and gas wells to ensure the normal operation of the whole well during drilling and after well completion. Several layers of casing shall be used for each well according to different drilling depth and geological conditions. Cement shall be used for cementing after casing is put into the well. It is different from TUBING and drill pipe and cannot be reused. It is a disposable consumable material. Therefore, casing consumption accounts for more than 70% of all oil well pipes.
Casing is a large-diameter pipe that serves as the structural retainer for the walls of oil and gas wells, or wellbore. It is inserted into a well bore and cemented in place to protect both subsurface formations and the wellbore from collapsing and to allow drilling fluid to circulate and extraction to take place.
Surface casing
- Protects the well from contamination in shallow water and gas layers.
- Supports the wellhead equipment and sustains the weight of the other layers of casing.
Intermediate casing
- Isolates different layers of pressure to facilitate normal circulation of drilling fluid and protect the production casing.
- Intermediate casing facilitates the installation of blow-out preventers, anti-leakage devices and tailpipes in the well.
Production casing (oil string)
- It is the conduit through which oil and gas pass from a below surface reservoir.
- It protects the well and separates fluids into various layers.
First, green pipes are threaded on each end. The threading is then inspected and, if necessary, rethreaded to ensure that the thread accurately connects to the coupling. The threading type includes STC/BTC/LTC. The casing pipes are strengthened by surface treatment and are subject to various inspections, including drifting and hydrostatic tests before they are coated and packaged into casing.
Casing pipes are ordinarily produced with outside diameter sizes of 114.3 mm to 508.0 mm.
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