What's wrong with this picture?

Replies to This Discussion

Permalink Reply by Darrell B Marsh on October 10, 2009 at 9:50am

OK, this is a Franks rig. A telescoping derrick..........guess what happened! I'll tell you "The rest of the story" after a few replys Karl! I am hoping to see a few odd pictures with little explanation so I can use my rusty brain and all that experience I think I have to figure it out. Should be fun!

Permalink Reply by Joseph green on December 28, 2012 at 6:28pm

Looks like the guides for the ram failed to me. We used to have to put a chain and boomer on the rams to pull them tight to the guides and take them down one by one as the housing of the ram got close to that particular guide. It was a pain but it kept that from happening to us lol

Permalink Reply by Darrell B Marsh on October 11, 2009 at 12:47am

Nope! Anyone else want to take a stab at it?

Permalink Reply by Drilling Ahead on October 11, 2009 at 1:47am

Well, never worked on anything that telescoped so I'm lost..At first glance at the bottom pic I thought there were a few bent stands, now I see it's part of the telescoping system...so I am going to guess.....someone pulled a little to much weight? Working stuck pipe, jars went off, something like that?

Permalink Reply by Justun Huston on October 11, 2009 at 1:56am

Got me on this one. We had a hydraulic sub that got hung up while it was going up. It did something similar. Can't wait to find out what happened here.

Permalink Reply by Darrell B Marsh on October 11, 2009 at 5:21am

Nice to see the interest! as I said this is a Franks/Cabot derrick, if you look at the top photo right hand side, you should be able to identify one of the four locking shoes (looks like the bottom of a horses foot...sort of). This is what supports the wieght of the top section when operating. The locking shoe's work with a linkage system under spring tension) Before rigging up a lever is pulled and put into a locked position, this energizes the springs and linkage so that as the locking shoes travel past a certain position along a guide they will automatically deploy outward. The top section is then lowered and the shoes (four of them) take the wieght. Rigging out is opposite, when the top section is raised past a certain height the shoes wil automatically retract because of the spring tension. (whew! hope you get the concept)

Here is what happened. The rig was working with the blocks off the hole towards the v-door. During the night shift the driller decided to fix the problem himself by adjusting the derrick. He sat the pipe in the slips and did all the various things needed so that he could move the derrick back with the hydraulics. He pulled the lever and nothing happened, he pulled it again and the derrick moved back. He then secured everything and proceeded back to work. What he did not know was the first time he pulled a lever he had pulled the wrong one and had lifted the top section of the derrick (putting the locking shoes into unlocked mode!) Then he attempted to pull out of the slips and Shazzam! A perfectly good set of raising rams were converted into modern art! Good thing the slips (pneumatically operated) did not fully open or there would have been death and destruction! As a result of this a safety system was put in place so that the top section raising lever could not be actuated without removing a safety plate. Also lighting was placed so that the driller could see the valve bank. Duh! I say rig her up right the first time!

How bout it, anyone got a photo mystery for us?

Permalink Reply by Shannon McDonald on October 11, 2009 at 10:11am

Looks like scoping rams all bent to hell. How did that happen?

Permalink Reply by Darrell B Marsh on October 11, 2009 at 10:28am

Check out my reply of 5 hours ago Shannon, I explain.

Permalink Reply by Darrell B Marsh on October 12, 2009 at 2:33am

Hi Karl, actually it is a reasonably stable setup, when raising the top section everything rides inside a sort of track system that guides the telescoping of the top section. The scoping rams are engineered to more than handle the wieght of the derrick, and when it is properly secured (locking shoes in place and hydraulic pressure bleed off) the derrick then becomes a single system where loads are transfered through the entire derrick and onto the pony sub or as it is sometimes call "T sill". This is a pretty good rig and they have been around for a long time, like all equipment it need to be understood and then used within the design limitations specified by the manufacturer. This rig is a Franks/Cabot 750, the derrick has a max hookload rateing of 312000 lbs with ten lines. We were using it for our completion operations when this incident occured.

Permalink Reply by Shannon McDonald on October 11, 2009 at 8:45pm

Apologize for the oversight, I'd only viewed the photo and not the comments. Was this recently/Ensign 28? So basically, as he was picking up off the slips with the "dogs" kicked out, the pick up weight rested solely on the rams? How much weight? Sonny Beaches!
I don't have a picture, but saw a semi-similar occurrence on a Delta rig back in the early 90's. We'd run intermediate and did a pull test after cement dried. I forget what they pulled, but think somewhere in the 400k range (1000 hp rig). Weight indicator showed to give a little weight back, so company hand barked to "keep pulling". Driller clutched it again and kepta a pullin', all eyes on the weight indicator rather than the elevators & landing joint. Bout that time tool-pusher comes storming up on the floor and hollers "look up you bunch of dumb MF's, you're sucking the crown in"!

Permalink Reply by Drilling Ahead on October 11, 2009 at 3:14pm

Ok, here is 1 for you guys to ponder...

Permalink Reply by Justun Huston on October 11, 2009 at 7:36pm

OK...Rigging down? Possibly lost the brakes while layin' er over? Not a clue...

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