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Hello Friends, I am working on a new design for Shear Drill Collar Ram, I would like to ask if anybody can give me a suggestion for the material, metallurge and surface coating. Thanks in the advance.

I would like to learn what's difference on underwater safety valve (USV), surface safety valve (SSV), sub-surface safety valve (SSSV) and subsea valve. I am working on a design for underwater safety valve to follow up API 6A application, how to set up the depth of water? if the all calculation...

I would like to learn what's difference on underwater safety valve (USV), surface safety valve (SSV), sub-surface safety valve (SSSV) and subsea valve. I am working on a design for underwater safety valve to follow up API 6A application, how to set up the depth of water? if the all calculation...

I would like to ask how to improve the leakage rate from Class III to Class IV for a MC-10/20 Type MOV Choke. We already made the surface flatnesss to two light band. Thank you very much.

I'd like to ask what's thread 14.125-2SAM2-2G and which's standard can be found this specification. Thanks.

Gentlemen, Using a 1-1/2" Sharp vee gage to inspect the threads on the outlets of Tubing head. How many turn on this gage is avaliable? I would really appreciate any feedback.

Gentlemen, I have a plug gage to inspect 1-1/2 Sharp vee thread on tubing head, but I don't know how to use it. Could you tell me for that? Thanks