2445btc fastening torque
Publish: 2021-03-30 05:03:43
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. You must explain what proct you need. For API standard procts, different types of thread have different make-up torque. For dome thread, you can find it according to API 5c1, but for partial ladder thread, you can control the torque according to the triangle position. If you need anything else, you can leave a message for me.
3. For different sizes,
buttons are different and different< br />
2-3/8" Eue with standard weight of 4.7ppf and J55 grade are small, good and large, as follows
1310 / 1760 / 2190
unit, n · m
2-7 / 8 & quot; The J55 of 6.5ppf and eue were
1670 / 2230 / 2790
3-1 / 2 & quot respectively; The J55 of 9.2ppf nue button is
1500 / 2010 / 2510
buttons are different and different< br />
2-3/8" Eue with standard weight of 4.7ppf and J55 grade are small, good and large, as follows
1310 / 1760 / 2190
unit, n · m
2-7 / 8 & quot; The J55 of 6.5ppf and eue were
1670 / 2230 / 2790
3-1 / 2 & quot respectively; The J55 of 9.2ppf nue button is
1500 / 2010 / 2510
4. It depends on the steel grade and standard weight
commonly used nue 3-1 / 2 & quot;, The
three kinds of torque of standard weight 9.2 and steel grade N80 are respectively
minimum: 2110
Best: 2810
maximum: 3510
unit: n · m
there are other questions to ask.
commonly used nue 3-1 / 2 & quot;, The
three kinds of torque of standard weight 9.2 and steel grade N80 are respectively
minimum: 2110
Best: 2810
maximum: 3510
unit: n · m
there are other questions to ask.
5. Please draw a picture. We need a fulcrum
m = FL,
m -- moment, nm
F -- force, unit: n
L -- arm of force, unit: M.
m = FL,
m -- moment, nm
F -- force, unit: n
L -- arm of force, unit: M.
6. Only the outer diameter and buckle type, no steel grade and wall thickness can not determine the make-up torque
7.
BTO is the torque from closing to opening, RTO is the torque from closing to opening, ETO is the opening torque, BTC is the torque from opening to closing, RTC is the torque from opening to closing, etc is the closing torque. The figure below is the curve reference diagram of cylinder torque
8. First of all, API is an entry-level specification in the drill pipe instry, which does not specify the need for make-up and break-up< API 5dp (drill pipe specification), API 7 (thread parameters)
while NC (digital) series is the most commonly used thread type. But in practical application, it is not only these kinds of buttons,
for example: HT, DS, FH, XT and other high torsion resistant buttons
then what is the basis for the pre grinding of the upper and lower shackles
it was only stipulated in the second edition of DS-1 standard that the make-up and break-up value is: 60% of the torsional strength of the joint is the maximum make-up and break-up value
the general user will require the manufacturer to do three make-up and break-up tests before leaving the factory:
the values are: 60% make-up and break-up value, 80% make-up and break-up value and 100% make-up and break-up value
the NC series of API standard buckles have different make-up and break-up values according to different steel grades of internal and external diameters
the make-up and break-up values of other special buckle types vary from manufacturer to manufacturer; But the difference is not much
if you don't understand, please continue to ask questions. If not, please set it as optimal
while NC (digital) series is the most commonly used thread type. But in practical application, it is not only these kinds of buttons,
for example: HT, DS, FH, XT and other high torsion resistant buttons
then what is the basis for the pre grinding of the upper and lower shackles
it was only stipulated in the second edition of DS-1 standard that the make-up and break-up value is: 60% of the torsional strength of the joint is the maximum make-up and break-up value
the general user will require the manufacturer to do three make-up and break-up tests before leaving the factory:
the values are: 60% make-up and break-up value, 80% make-up and break-up value and 100% make-up and break-up value
the NC series of API standard buckles have different make-up and break-up values according to different steel grades of internal and external diameters
the make-up and break-up values of other special buckle types vary from manufacturer to manufacturer; But the difference is not much
if you don't understand, please continue to ask questions. If not, please set it as optimal
9. According to the geographical location, if the track of the actual drilling hole is smooth and there is no large drilling parameters and bit water hole, the screw on and off of the screw on Tong or power tap should be used according to the manufacturer's recommendation, and the screw on and off should not be carried out
10.
Shanghai Guojin is making Baosteel l80-13cr oil casing
l80-13cr is a special oil casing of Baosteel, which is resistant to corrosion and CO2. The commonly used buckle type is Baosteel gbt1 BGC
the following figure shows the range of buckle torque, you can refer to the following:
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