Use of Safety Restraints on High Pressure Lines

Replies to This Discussion

Permalink Reply by woody robertson on November 2, 2011 at 5:45pm

Hello ,most service companies I've worked for or been around require the use of the restraints on energized fluid. Depending on the company if it is mandatory,would think using common sense would be the answer for the mandatory part.

I have a couple of papers about it, one from Schlumberger and one from FMC, if you would like I will send to you. The video is an old Dowell video but its the real thing. Think to many people think these restraints should be required on fluid pumping as well, one more time common sense.

After you read the letter from FMC, use your thinking. Back in the late 60's and early 70's yes we did need this for fluid pumping, but today with the standards all of the companies go by & the way the treating iron is designed doesn't seem like they are needed.

All in training of employes seems to work best.

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Permalink Reply by khaled Mohamed shehab on November 2, 2011 at 7:04pm

Hello, I will be appreciated  if you send me the papers from Schlumberger and FMC and we will discuss later

 

 

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Permalink Reply by woody robertson on November 3, 2011 at 7:43pm

Hello

here are the two letters.

Woody

Attachments:

• Safety Line.pdf, 39 KB
• Safety Restraints.pdf, 71 KB

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Permalink Reply by randy harris on November 3, 2011 at 1:25pm

Khaled Halliburton has quit put cables restraints on the high pressure discharge lines . They said it has it does more damage with them on .

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Permalink Reply by khaled Mohamed shehab on November 4, 2011 at 7:23am

Thanks woody for the letters of Schlumberger and FMC however I would like to highlight about the following standards , API RP54 for occupational safety for oil and gas well drilling and servicing operations item 9.13.3"each sections of high pressure rigid line should be secured using appropriate means to prevent movement should the line fail.Flexible high pressure hoses should be properly secured to prevent unsafe movement---etc "Shell Global Standard For Temporary Pipework EP2006-5393 item 5.5.7 "Temporary pipework shall be tied down to effectively restrain the consequential effect of pipe burst. The restraint system shall be sufficiently strong to handle the forces for the system fluids and pressures given in the attached table - Please see attachment (dynamic load of restraints).On the other hand , FMC Technologies announced the introduction of the new temporary pipe work - Restraint System (TRP System) for use on high pressure temporary well services flow lines This system will provide an additional level of protection for personnel and physical assets by minimizing the amount of sudden movement should there be an unexpected separation in a flow line which under pressure. Please see attachment for TPR System April 2009.

Personally I am in favor of having a safety wire in place

Testing and inspection of HP lines are not enough to be a proactive measure to reduce the risk of failure of high pressure treating lines? e.g use all Chicksans are above minimum wall thickness , all welds are X- ray and MPI inspected , no threaded connections are used and all hammer union are 1502 only

 

Attachments:

• Dynmic loading of restraints.pdf, 102 KB
• TPR System Sizing Charts.pdf, 266 KB
• TPR System-screen.pdf, 486 KB

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Permalink Reply by Russell Dwayne Olivier on April 6, 2012 at 4:26pm

Well guys, I have read the comments and all are interesting.

To get your answer, look into the API well control standards. You will see where the shall stops and the industry's best practices begin.

Many operators have made ALL of this their company's standard. I read mention of Shell E & P. Many others than Shell have made this topic a SHALL in their standard.

Many company's are getting away from cable restaints and using the rib and spine application. We have had safety alerts where the manufactuer has mis labeled a union, causing it to part. Some threads will make up, but not properly. Not all people have the ability to catch this, so guages are being made to engineer out this hazard.  All high pressure iron is being anchored as well, to follow the API standard in well control.

The majors, large independants, small independants have been gathering our industry's best practices from across the globe and making it their company standard.

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Permalink Reply by khaled Mohamed shehab on April 6, 2012 at 7:08pm

Hi Russell

I agree with you about some threads will make up , but not properly . e.g A 2” 1502 Wing Nut will make up to a 2” 602or 1002 thread half but will fail …

A 2” 1502 Wing Nut will make up to a 2” 602 or 1002 thread half and will hold some pressure ! However … … it will fail

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Also off brand unions may not hold rated pressure

Finally Like 1002 and 602 Unions, a Guiberson thread half will make up to a 1502 wing nut, but will fail explosively.

 

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