We have a cylindrical housing with 16 3/4"-16 UNF 2B threaded holes. The housing and port are coated with manganese phosphate. A 3/4"-16 UNF 3A nozzle (pin) thread made with D2 Tool Steel and no coating is called out to make up into the hole. Our Supply Chain Manager says he is having hell...
Is there a time dependent strain condition when a material is under stress (alloy steel 4140 Q&T) that could cause permanent strain increase over time at ambient temperature?
I have a collet that is collapsed into a sleeve ID under very high bending stress for the material. After 1 year the...
We induction heat a Flex Seat so collet fingers are hot enough we can hot work to size. I don't know how to model this in Solidworks. I have attached a JPEG of a section view of the flex Seat. We don't even show it flared in our drawing. I want to draw this flared at fingers about their...
If you had a well with 50 sleeves, 5 per zone and just fraced all of them and were ready to flow back but couldn't because of blockage in Sleeve 5 in first zone, what kind of pressure differential would you expect between zones?
Say ball is jammed into a seat but will dissolve in 30 days. You...
I want to use a press and flare collets out made from low alloy steel 110 MYS 36 RC 1250 tempering temperature. We are using a flaring mandrel at 100F below tempering temperature and holding until cools till about 900F or 13 minutes. Flared collets do not spring back. I want to try and do...
Will the double start affect the thread strength or torque value of a single start thread? If the pitch is the same, it should not matter, right? It’s just two threads working together instead of one. Unless there is something I missed.
A 10 TPI thread would have .1 pitch but .2 lead correct...
Two questions:
1) Could cold temperature fluid (40F vs. 80F) cause a std o-ring seal to leak after it has already energized and began holding pressure differential?
I know it can cause problems achieving a seal because it becomes hard and loses elasticity. I have seen where we just warmed...
I can find a Hook or Pin Height for subject. I don't know if it is a hook or pin and what diameter or width it is. MSC and Grainger just don't go into that detail for these larger Spanner Wrenches. Can anyone help direct me to a website that has the dimensions and where I could purchase the...
Are you stub acme threads to make up most connections on my tool designs. These are downhole tools used in oil and gas wells. I had been using high temperature seal Grease. I torque the outer connections to 10,000 foot pounds do you prevent the tool from backing off while running in the hole...
Application is for use on Test Caps and Plugs used to pressure test assemblies with premium self sealing buttress type threads without damaging either the assembly or test equipment. This would be to prevent galling. The threads on these assemblies are casing threads and are made to be...
I have a premium downhole thread that was pressure tested with Test Cap but they put PTFE tape on to the crest of the thread (buttress type). At 12,500 psi the connection below apart and left a large hole and thread deformation along the pin. Mag particle inspection shows now cracks or...
I there a brush that can be used safely to remove small burrs on the thread form of a BTC thread. Possibly use some 125 Emory to knock down the burr and a polishing wheel with pneumatic grinder to tun around the root or crest of thread to keep surface smooth.
We can't see, to make-up a BTC by...
Does anyone know the API Procedure for making up LTC and STC connections? I have seen torques listed but is that just a reference based on Coupling aligning with vanish point. I have torques but don't know the pipe dope used or any particulars, just that it was reported in API RP5C1 1981. This...
Phophated Alloy Steel, 13Cr and Nickel Alloy parts make the assembly along with set screws and threaded test caps to pressure assembly. Bleed for air.
Pressure test fluid will be compressed up to 20,000 psi but generally 5ksi at 85F
HNBR and Viton are the Seal options and concern me the longer...
Can QPQ be applied to 13 Cr or Nickel Alloys? Back in the 90's I was told it couldn't.
What will it do to the passivisation? Does it eliminate the need?
- CJ
I can't seem to find a fluid to use to shop test downhole tool assemblies to working pressure (5 to 10 ksi), hold for 1/2 hour and drain before storing or packing to ship. Most of the materials we use are alloy steel but they have HNBR and Viton seals as well. I need a fluid that wont damage...
My question is really regarding the difference between seal friction on a dynamic o-ring in several conditions. It is axial Piston seal on rod. The o-ring is 300 series HNBR because it is robust. It will only cycle 3 times then lock open and the seals will become static. The conditions are...
I am curious what a 0% NaCL fluid is. Is that just distilled water?
We make a polymer that absorbs freewater from typical wellbore water based and oil based muds. The more freewater (less salt), the faster the polymer swells and isolates producing zones downhole.
2-10% NaCL is common...
Can anyone explain or have link to site that explains the details of a vacuum pump designed to remove aire from hydraulic system? I have a procedure below but
a) not sure why only fill chambers with 3/4 full of oil before starting vacuum.
b) Why would oil pressure drop to 15 psi? Would it not...
Fellow Engineers,
I have a metal selection question based on my companies proclivity to use dissimilar metals wherever a thread connection exists except perhaps for low alloy steel. But CRA and SS material it is a rule of thumb we live by. I have a 304 SS Reservoir with low hardness and...
