BTC thread

1. BTC (buttress thread coupling) trapezoidal thread coupling is an API standard thread connection type, which is commonly used in the connection of petrochemical pipes or tools, such as floating collar, guide shoe and pipe shoe used in cementing operation. The pitch is 8 teeth per inch and the tooth height is 1-1.2 mm. The external thread part 1 is designed with - 15 ° The end face shoulder 4 is connected with - 15 of internal thread part 2 after tightening ° Internal torque shoulder interference fit, after the internal and external threaded parts are tightened, at least one circle of threads closely fit, the top surface of thread teeth of threaded parts is parallel to the oil pipe axis, and the inner diameter D2 of internal thread 2 is approximately the same as that of external thread 1. Trapezoidal thread has excellent sealing performance, high connection strength and good anti torque make-up ability, so it can be used as an alternative to thickened thread or replace thickened thread in practical engineering

2. 1. Implicated rotation of cylinder
the implicated rotation of cylinder and piston e to the action of bearing is fixed or stopped by three 45 degree grooves or Z-M threads. But to stop properly, not because of the external interference force to make the cylinder deviation, oblique and abnormal work
2. Pay attention when installing the clutch on the shaft
when installing the clutch on the shaft, use special tools to pressurize the hollow shaft tube as far as possible, and do not impact the cylinder or other vulnerable parts
3. Installation of shaft end of pulley and gear
the radial force center of pulley or gear shall be aligned with the bearing center of two groups of bearings inside the flange as far as possible. Excessive offset will affect the service life of the proct
4. Bearing related
generally, the sealed bearing is maintenance free, and a few parts need to be properly supplemented with grease according to the relationship between the use environment, usually 1 to 6 months
5. Avoid overload operation
the safety factor of 1.5 to 2 times of the torque should be adopted as far as possible in proct selection, which will cause damage to the tooth surface or rece the service life
the above are matters needing attention. If you are helpful, please adopt them. Thank you

3.

1. BTC: chemical vocabulary

BTC is the abbreviation of (Trichloromethyl) carbonate. It is the abbreviation of a chemical substance, mainly composed of carbon, chlorine and oxygen. The chemical formula is c3cl6o3, which can be used as the substitute proct of highly toxic phosgene and diphosgene in the synthesis

BTC: enterprise abbreviation

BTC refers to BTC Yingqun enterprise from Taiwan, China, which is a large-scale high-tech enterprise developing and procing keyboard, mouse and recorder. BTC is famous for procing high-quality computer peripherals. BTC is the OEM keyboard and add-on card proced by famous brand EMPREX, ranking first in Taiwan, especially the third in the world

BTC: the concept of bitcoin was first proposed by Nakamoto on November 1, 2008, and was formally born on January 3, 2009. According to the idea of Nakamoto, the open source software is designed and released, and the P2P network on it is constructed. Bitcoin is a virtual encrypted digital currency in the form of P2P. Point to point transmission means a decentralized payment system

BTC: engineering material

BTC (buttress thread coupling), full name of partial trapezoidal thread coupling, is an API standard thread connection type, which is commonly used in the connection of petrochemical pipes or tools, such as floating collar, guide shoe and pipe shoe used in cementing operation

5, BTC: e-commerce mode

BTC (business to customer) e-commerce is one of the categories of e-commerce by trading partners, that is, e-commerce of commercial institutions to consumers. This form of e-commerce is generally based on the network retail instry, mainly with the help of the Internet to carry out online sales activities. BTC is also known as B2C, B2C mode is the earliest e-commerce mode in China

4. At present, Chinese citizens are eligible to apply for APEC Business travel cards: (1) government officials engaged in APEC affairs or in charge of travel card business, as well as Chinese officials working in APEC organizations 2 Management personnel, main business personnel and technical personnel in large state-owned enterprises under central management 3 Personnel of local state-owned enterprises 4 Personnel of private enterprises 5 Chinese (mainland) personnel in Sino foreign joint ventures, wholly foreign-owned enterprises and Taiwan, Hong Kong and Australia funded enterprises. The above-mentioned persons must hold valid PRC passport and frequently travel to APEC economies e to work needs. They have no criminal record or have been refused visa by foreign countries, especially the economies implementing the travel card scheme.

5. Chongqing Meilian English learning English, you can according to the detailed course to stop detailed inquiry, because the Meilian curriculum system is quite perfect and one-sided, so the course cost is also different, if you want to complete the improvement of English level, you can leave Meilian to study systematically, now registration is quite preferential, If you want to enjoy the course teaching service with high cost performance, please come to the learning experience of Meilian!

6. Specification: oil tubing 2-3 / 8 "- 4-1 / 2", end processing form nue, eue. Oil casing 2-3 / 8 "- 20" perennial spare oil casing, more than 1000 tons in stock, api5ct tubing, api5ct casing, oil pipe specification 26.67-114.3mm. Api5ct oil casing specification is 114.3-508mm. Material: h40.j-55, k-55, N-80, l-80, C-90, c-95, P-110, q-125, etc. There are STC (short round buckle), LTC (long round buckle), BTC (partial ladder buckle), VAM (wangba buckle) and other buckle types of api5ct oil casing. Api5ct oil casing length R1, R2, R3
from: China investment casting portal

7. Surface casing 20 & quot; Density: 106.5ppf, steel grade: k-55, button type: BTC (partial trapezoidal thread coupling), run in 26 & quot; The borehole is 800 feet,
technical casing 13-3 / 8 & quot; Density: 54.5 & 68 PPF, steel grade: l-80, button type: BTC (trapezoidal thread coupling), 17-1 / 2 & quot; 4000 ft
technical casing 9-5 / 8 & quot; Density: 47 & 53.5 PPF, steel grade: l-80, button type: BTC (partial trapezoidal thread coupling), run in 12-1 / 4 & quot; Well bore 9000 ft,
reservoir casing 7 & quot; Density: 29ppf, steel grade: c-95, button type: BTC (partial trapezoidal thread coupling), running 8-1 / 2 & quot; The wellbore is 9600 feet

8. Buttress thread coupling is a kind of API standard thread connection type, which is commonly used in the connection of petrochemical pipes or tools, such as floating collar, guide shoe and pipe shoe used in cementing operation.

9. BTC partial trapezoidal thread oil casing
4.50 & # 39&# 39; 13.5 it should be the specification

10. This is the identification number of oil casing. It is recommended to refer to API 5CT standard document