Replies to This Discussion

Permalink Reply by Joe Aldridge on July 25, 2012 at 0:15

Skip,

LLOG did the same thing when drilling the Crumholt well to TUSC as a vertical. It looks like this is a new drilling technique. 

Permalink Reply by Keith on July 25, 2012 at 8:19

Sliding is a common practice where you stop rotating while drilling in order to direct your drilling assembly. Your drilling mud motor has a slight bend in it that allows you to direct the bit on the proper direction. The mud motor uses the fluid being pumped to turn the bit without added pipe rotation.

When you slide you slow your rate of penetration and the efficiency of cuttings removal, for that reason many companies now use rotary steerable drilling assemblies. With rotary steerables you can choose your direction while you rotate.

Permalink Reply by Skip Peel - Mineral Consultant on July 25, 2012 at 8:51

Thanks, Keith.  Joe and I are familiar with sliding and it's uses.

Permalink Reply by Keith on July 25, 2012 at 9:08

Yeah I misunderstood what you guys were talking about. Sliding in the vertical section!

 

In the Gulf we sometimes have to do a touch up slide in the vertical section just to keep vertical depending on the formation, but early in a well we can have possible collision issues with other existing wells close to the surface location, so that would be another reason to slide early if you were drilling on a pad with multiple wells for instance.

Permalink Reply by Joe Aldridge on July 25, 2012 at 9:09

Keith,

I understand the operation of directing the bit in a certain direction and the use of the sliding technique. However, in the Crumholt well that was drilled this past Spring it was the first time I had seen it used in a vertical hole that was not in a lateral and was not going to be lateraled.  I agree with you this method would seem to slow drilling penetration. So I'm not sure of the benefits while drilling vertical. Just one of those puzzling things about these new drilling methods.

Permalink Reply by Keith on July 25, 2012 at 9:19

Yeah I didn't properly read what you guys were talking about

Permalink Reply by Keith on July 25, 2012 at 9:36

I can think of three reasons that you would slide in a vertical well.

One is that they got too aggressive with weight on bit and had to make adjustments to stay vertical.

The other is that they had a known formation anomaly such as a loss zone that they wanted to avoid.

Another would be existing or past wells that were drilled in the area that they needed to avoid.

I think that you'll see more sliding in the vertical section of wells as multiple well pads pop up during the development mode of shale plays, simply due to collision issues. You will also have more avoidance of problem formations as we learn the areas more.

Permalink Reply by Two Dogs, Pirate on January 14, 2013 at 7:56

#245071 Completed 1-10-13. 10000 MCFD, 903 BCPD, 24/64 CK, 5218 BWPD

Permalink Reply by Skip Peel - Mineral Consultant on January 14, 2013 at 8:00

Nice well.  Thanks for the heads up, TD,P.

Permalink Reply by david crocket on January 14, 2013 at 9:29

I see they are working on  245641 as well

01/07/2013	05	14034		DRLD TO 14034'; TSTD BOP'S 1/4/13 WHEN MADE BIT TRIP; RAN 7 5/8" CSG TO 14034' W/ 850 SXS;
01/02/2013	05	13222		DRLD
12/26/2012	05	9638		(BOP INFO: 12" FLOWLINE DIVERTER; HYDRIL 11" 10M; CAMERON 13 5/8" 10M [2 7/8" X 5" VBR] - TSTD 12/21/12) DRLD; RAN 13 3/8" CSG TO 4025' W/ 2735 SXS & TSTD; DRLG
12/17/2012	05	1007		DROVE 20" TO 80'; SPUID 12/16/12; DRLG; 13 3/8" CSG TST RECD 12/28/12
11/02/2012	01	21070		2449' FEL & 2265' FSL OF SEC 29. PBHL: 922' FEL & 330' FSL OF SEC 32.

Permalink Reply by david crocket on February 19, 2013 at 11:48

Another new well permitted in Vernon parish today

VERNON

01

245992

AUS C RA SUP;INDIGO MIN 17

001

19-FEB-13

A243

017-01S-11W

2117

BURR FERRY, SOUTH

19542

Permalink Reply by John Matherne on February 20, 2013 at 6:41

How did these other wells turn out?

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