Posts Tagged ‘steel casing’

By Steve Mocarsky smocarsky@timesleader.com
Staff Writer

FAIRMOUNT TWP. – Having drilled 8,100 feet straight down into the earth beneath the Buda 1H Well Pad, Encana Oil & Gas is now preparing to begin the horizontal leg of the first Marcellus Shale natural gas well in Luzerne County.

Company officials on Thursday provided a tour of the well pad off state Route 118, out behind Ricketts Glen Hotel, explaining various parts of the drilling operations and noting extra safety measures employed, given the proximity to wetlands.

As an automatic pipe handler lifted 40-foot sections of drill pipe, each weighing about 650 pounds, from a storage area on the ground onto the drill rig, Encana operations engineer Joel Fox explained the purpose of some of the equipment used on-site.

“This is one of the modern rigs with an automated pipe handler. … In the old days, you had roughnecks out there handling that pipe, two or three guys muscling around, fighting that pipe. This system’s a lot safer,” Fox said.

Joining Fox were Encana operations engineer Ashley Lantz and environmental health and safety coordinator Jarrett Toms.

Toms said there have been no health or safety related issues on-site since the drilling began last month.

Fox showed some large steel pipe, called casing, stored there. Surface casing is run down into the well bore about 425 feet and is “what provides the protection of your fresh-water aquifers. That’s been run already and cemented,” he said.

He also showed intermediate casing, which is run down to 2,150 feet. The intermediate casing is cemented inside the surface casing, and cement is also pumped around the exterior pipe to prevent gas from seeping up the outside of the casing and into ground water.

A third string of steel casing – production casing – will be run into the total depth of the well after horizontal drilling is complete. The horizontal drilling begins by drilling a curved path from a vertical well bore to 90 degrees over a 900-foot span.

“The pipe is pretty flexible. It’s stiff and strong, but it will bend,” Fox explained.

During drilling, rock and drill bit cuttings must be removed from the well bore.

Fox pointed out pallets full of bags of chemicals that are mixed with synthetic food-grade drilling oil to make the drilling mud.

“It looks and feels like baby oil,” he said. Emulsifiers are added to the oil and water to make the mud viscous so it will carry the drill cuttings to the surface of the well for removal.

When drill cuttings come up, they’re cleaned, mixed with sawdust, stored in covered containers until tested by the state Department of Environmental Protection and then hauled off to a landfill.

Fox also noted there is no reserve pit to hold the cuttings at the Buda site.

“This is an entirely closed system. In other words, there are no open pits that you hear people talk about a lot in the newspaper. All fluids are contained in tanks; drill cuttings, fluid is all in tanks,” Fox said.

“We consulted with DEP, and because we’re in a wetlands area, a closed system made a lot of sense,” Fox said, even though a closed system is more expensive to operate than using a reserve pit.

It also made sense to use a closed system at the site because the water table is high in the area, so a pit could not be dug very deep, he said.

To protect the ground from potential spills of any fluids on-site, the part of the well pad under and around the drill rig and all of the tanks and equipment is covered with liners hung over berms that look like barricades, Fox explained.

“We call these duck ponds. If something gets spilled, it stays in there. And we have what looks like a large Shop-Vac device. So as soon as any fluid or rainwater gets on that liner, we can suck it up like a Shop-Vac in your basement,” he said.

Fox also pointed out four monitoring wells the company drilled at strategic locations between the site and Ricketts Glen Hotel, which has the nearest water well.

Also on-site are five trailers for office space and to house some staff. There are five people with the drilling contractor – Horizontal Well Drillers – plus two to five Encana employees, drilling specialists and contractors on-site at all times.

It should take 10 days to two weeks to drill the 3,500- to 4,000-foot horizontal leg of the well, also called the lateral, in a southeast direction. The company uses computerized equipment near the drill bit to make sure the well bore is going exactly in the direction the engineers want it to, Fox said.

“It’s like a GPS on the (drill) bit,” he said.

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Copyright:  The Times Leader

State DEP chief talks about protecting water supplies in the Marcellus Shale areas.

By Steve Mocarskysmocarsky@timesleader.com
Staff Writer

HARRISBURG – State Department of Environmental Protection Secretary John Hanger laid down the law to representatives of oil and gas companies drilling in the Marcellus Shale at a meeting he called on Thursday.

More precisely, he laid out two sets of proposed regulations for natural gas drilling procedures and responding to reports of contamination of water supplies – proposed regulations that members of the oil and gas industry helped create.

“There were technical discussions on how to prevent gas migration from (natural gas) well sites to water wells and what to do if migration does occur and how to respond,” Hanger said in an interview from his cell phone as he was riding to Dimock after the meeting in Harrisburg.

Hanger was on his way to an interview with ABC News at the site of a natural gas well that Cabot Oil & Gas capped under DEP order after the regulatory agency determined it was one of three that leaked methane, contaminating the well water supplies of at least 14 households in the rural Susquehanna County village.

“I challenged the industry. … I made it clear that regulations would be enforced,” Hanger said, noting that DEP opened two new field offices in Northeastern Pennsylvania in response to Marcellus Shale development and is doubling its enforcement staff. “I also made it clear we were strengthening the rules,” he said.

DEP spokesman Tom Rathbun said in a separate interview that the new drilling regulations would require specific testing according to standards of the American National Standards Institute on steel casing used in all high-pressure oil and gas wells as well as the use of “oil-field grade” cement in well construction.

Rathbun said the oil and gas industry supports the implementation of those standards, and most companies already employ those practices under best-management practices. The goal is to have all companies comply, and Hanger asked the industry to voluntarily comply immediately, rather than wait until regulations receive all necessary approvals, which are expected in November.

Rathbun said the new regulations are “designed to prevent situations like the one in Dimock.” He said the issue there was incomplete casing – Cabot Oil & Gas didn’t use enough cement in the well construction.

DEP in April banned Cabot from drilling in Pennsylvania until it plugs the three wells determined to be leaking gas. Cabot has already paid a $240,000 fine and must pay $30,000 per month until the company meets its obligations.

Rathbun said one well is capped, and Cabot is currently working to cap a second.

He said most of the discussion at the meeting focused on responding to reports of gas migration into water sources.

Currently, the industry is required to report any suspected or confirmed occurrence of gas migration to DEP. The new regulations would require immediately reporting suspected or confirmed migration to DEP and to emergency responders for the affected municipality.

As chairman of the state Environmental Quality Board, Hanger on Monday will present those proposed regulations to the board for adoption. If approved, they will be sent to the House and the Senate Environmental Resources & Energy Committee.

Each legislative committee will have 30 days to review the proposed regulations before either recommending a vote or sending them to the Independent Regulatory Review Commission, which is composed of administrative law judges. A final approval is required from the state attorney general to ensure they are constitutional.

The whole process can take about six months.

Kathryn Klaber, president and executive director of the Marcellus Shale Coalition, which represents the natural gas production industry, said in a written statement that the coalition is “fully committed” to continue working with government regulators to ensure that the potential of the Marcellus Shale in the state is realized in a safe and responsible way.

“Today’s meeting with DEP represents yet another honest and straightforward discussion about the best practices needed to fully achieve this vision. Positive progress on practices relating to the management of historic and naturally occurring shallow gas, as well as other initiatives related to transparency and well integrity, will help our industry continue to strengthen its safety and environmental record while continuing to create tens of thousands of jobs each year for residents of this state,” Klaber said.

Steve Mocarsky, a Times Leader staff writer, may be reached at 970-7311.

Copyright: Times Leader