casing drilling « Thread Started on Mar 29, 2004, 1:46pm »
Hi! I have a question. Does someone from you something about casing drilling? I need some material with pictures and the principle of this technology, because Iam student from Slovakia and this technology will be in Slovakia mayby in 30 years )). If is here somebody, who wants help mi pls write me or send me some material on rkrkrk1@atlas.sk . Or let me some message here. Thank you very much. )))))
Re: casing drilling « Reply #1 on May 1, 2004, 7:42am »
Hi Mate.
Dont know if this is of any help,but you should look at Halliburton,Weatherford and Baker Site,Along with Downhole Products who provide casing reamer shoes.
A few years ago i came across the Drilling casing systen and think it was used in the Gulf of mexico. (somewhere) and from what I understand it worked.
Anyway if you just place a serch on the web for oil and gas drill in casing it should give you something to go on.
regards Kevin Martyn. Senior Drilling Engineer Veba Oil Operations. Tripoli
Re: casing drilling « Reply #3 on May 28, 2004, 6:53am »
So... nobody wanted to help a student, just sent him walking through I-net Hi all, I'm a newcomer here intereded in INFORMATION, of course FREE
I have some and ready to share. Got here by interesting topic (casing). Just two words abt. me -- I'n from Russia, work as translator (O&G my dearest baby).
Will be glad to go on with helpful being here. Bye all
Re: casing drilling « Reply #6 on Jun 26, 2004, 5:43am »
Dear all,
Casing drilling services are currently monopolized by either TESCO, BAKER or WEATHERFORD, but then the simplest method is the later. The previous needs to have some kind of modifications on the TDS system.
Easy to understand if got pictures of the system. WEATHERFORD is using Drilling With Casing system with the means of casing spear. The spear is connected to the TDS and engaged inside or outside the casing.
The whole will then be rotated and backed-off for connection. The connection capacity is an issue and need to be addressed during analysis since this the weakest point of the string. Torque analysis must given great care since this is the weakest point.
Joined: Apr 2003 Gender: Male Posts: 71 Location: Lander, WY
Re: casing drilling « Reply #8 on Aug 7, 2004, 1:29am »
In our casing drilling operations, I provide e-logs for GGRE staff in 2 ways.
1) Drill down to TD, verifying TD with use of ROP/Gas log (Mud logs). These wells are all development wells and we have good control from offsets and seismic. We then cement casing in the ground. After moving the rig off, Schlumberger R/U and run cased hole logs. Of course as a driller, this is always my preference. <24 hours after drilling the last foot, the casing is cemented, BOP’s nippled down, tree nippled up, pits cleaned and rig released. There is no other way that a 10,000’ well could be rig released this soon after TD, with casing on bottom.
2) Drill down to TD, shear off the bit and leave on bottom. Pull casing back into intermediate casing and hang off in the wellhead (generally requires 2200'-2500' of pipe being pulled). Rig up Schlumberger and using their Slim Access tools, run through the hung off casing and into open hole. We provide triple combo logs and this is all that is required.
When drilling with retrievable systems (7" or 9 5/8"), you can also run LWD. This is an alternative that I have had as a contingency but have never had to P/U. We have run motors and MWD below the profile nipple with excellent telemetry.
Re: casing drilling « Reply #9 on Aug 7, 2004, 12:26pm »
Thanks a million for that information. It will surely help me in my thesis. Just some more help....
1. so do you mean casing drilling (as done in the first method) isnt so good for exploratory wells and again you currently need only triple combo services in the second?
2. With some more focus on the weatherford system, resistivity logs will be difficult to get. what is the current siuation and/or is there a way round it.?
3. schlumberger run the cased hole logs . Do you know the services they provide while doing this? (pt. resistivity)? have heard of their CHFR tool but what do you think in terms of its performance in practice?
Sorry I may be asking to omuch but anything will be of help.
Joined: Apr 2003 Gender: Male Posts: 71 Location: Lander, WY
Re: casing drilling « Reply #10 on Aug 11, 2004, 4:43pm »
The formation evaluation logs run on our casing drilled wells are as follows.
RST—Reservoir Saturation Tool. This log is GR/Neutron porosity/sigma. Primary tool run on most wells without open hole logs.
CHFR—Cased Hole Formation Resistivity. This log is only run when it is has questionable saturations
GR—When we are drilling an offset that has control on all sides, sometimes the GGRE staff feels confident enough to run a gamma ray only. If we see a good gas show on the mud log, it always gives them a warm fuzzy feeling.
We are somewhat limited in the cased hole FE logs to run due to the 4½” casing at TD. If we had larger pipe sizes to work in, there are other cased hole logs that could be run (i.e. sonic, etc….)
If you are drilling exploration wells, casing drilling would not be a preferred choice for drilling. In order to obtain open hole logs, the pipe must be pulled. If you need to pull pipe when at section TD, it may defeat the benefit of casing drilling. If you happen to stick the pipe on the TOH, you would be real sorry you ever moved it off bottom.
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)). If is here somebody, who wants help mi pls write me or send me some material on rkrkrk1@atlas.sk . Or let me some message here. Thank you very much. 
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Hi Mate.
