Hydrocarbons occupy a vital role in our life and continue to play an important role for many more years to come. We need to follow all technological innovations to continue our productivity standards to achieve our production targets. Let us extend our vision to achieve this mission.

Thursday, July 5, 2012

How to Choose Wellhead ?

Wellheads can be Dry or Subsea completion. Dry Completion means that the well is onshore on the topside structure on an offshore installation. Subsea wellheads are located under water on a special sea bed template. The wellhead consists of the pieces of equipment mounted at the opening of the well to regulate and monitor the extraction of hydrocarbons from the underground formation. It also prevents leaking of oil or natural gas out of the well, and prevents blowouts due to high pressure formations. Formations that are under high pressure typically require wellheads that can withstand a great deal of upward pressure from the escaping gases and liquids. These wellheads must be able to withstand pressures of up to 140 MPa (1400 Bar). The wellhead consists of three components: the casing head, the tubing head, and the 'Christmas tree' Photo: Vetco international

A typical Christmas tree composed of a master gate valve, a pressure gauge, a wing valve, a swab valve and a choke is shown here. The Christmas tree may also have a number of check valves. The functions of these devices are explained in the following paragraphs. Ill: Vetco international At the bottom we find the Casing Head and casing Hangers. The casing will be screwed, bolted or welded to the hanger. Several valves and plugs will normally be fitted to give access to the casing. This will permit the casing to be opened, closed, bled down, and, in some cases, allow the flowing well to be produced through the casing as well as the tubing. The valve can be used to determine leaks in casing, tubing or the packer, and will also be used for lift gas injection into the casing.

The tubing hanger (also called donut) is used to position the tubing correctly in the well. Sealing also allows Christmas tree removal with pressure in the casing.

Master gate valve. The master gate valve is a high quality valve. It will provide full opening, which means that it opens to the same inside diameter as the tubing so that specialized tools may be run through it. It must be capable of holding the full pressure of the well safely for all anticipated purposes. This valve is usually left fully open and is not used to control flow.

The pressure gauge. The minimum instrumentation is a pressure gauge placed above the master gate valve before the wing valve. In addition other instruments such as temperature will normally be fitted.

The wing valve. The wing valve can be a gate valve, or ball valve. When shutting in the well, the wing gate or valve is normally used so that the tubing pressure can be easily read.

The swab valve. The swab valve is used to gain access to the well for wireline operations, intervention and other workover procedures (see below), on top of it is a tree adapter and cap that will mate with various equipment.

The variable flow choke valve. The variable flow choke valve is typically a large needle valve. Its calibrated opening is adjustable in 1/64 inch increments (called beans). High-quality steel is used in order to withstand the high-speed flow of abrasive materials that pass through the choke, usually for many years, with little damage except to the dart or seat. If a variable choke is not required, a less expensive positive choke is normally installed on smaller wells. This has a built in restriction that limits flow when the wing valve is fully open.

This is a vertical tree. Christmas trees can also be horizontal, where the master, wing and choke is on a horizontal axis. This reduces the height and may allow easier intervention. Horizontal trees are especially used on subsea wells.


Posted by Aaron Holbert on May 19, 2012;

National Oilwell Varco Profile and Analysis


This is the second in a series of articles covering "unpopular" larger companies.  Benjamin Graham believed that such companies may present opportunities for enterprising investors.  We discussed the Graham approach in more detail in a recent article.

Recent events in the Gulf of Mexico have increased awareness of the risks facing oil exploration companies operating in very deep waters.  Drilling for oil beneath five thousand feet of water entails challenges that test the abilities of exploration companies under the best of circumstances.  We are now witnessing the impotence of industry or government to deal with a well that has been gushing out of control for over a month.  The current moratorium on deepwater drilling in the United States could be adopted by other countries as well and we cannot predict the duration of the moratorium.  In this environment, is any investment in oil exploration or ancillary products and services worthy of consideration?

National Oilwell Varco (NOV) was formed on March 11, 2005 by the merger of Varco International and National-Oilwell.  The company is the fifth largest oil and gas products and services company by revenues.  The company is a supplier of rig technology, petroleum services and supplies, and distribution services.  Customers include oil majors as well as drilling contractors.  National Oilwell Varco has not been mentioned as one of the involved parties in the Deepwater Horizon disaster.

Overview of Business

One of the daunting aspects of investing the oil and gas exploration industry involves the amount of industry jargon that an investor must understand in order to intelligently read financial reports.  The National Oilwell Varco 2009 10-K report includes a glossary of terms (pages 23 to 27) that the reader is encouraged to review.  The business overview section also provides a good understanding of the interaction between firms such as NOV and drilling contractors and exploration firms. We will not attempt to provide an introduction to the industry and terminology to keep this article to a reasonable length.

NOV operates in three segments:

  1. Rig Technology. Rig technology involves the design, manufacture, and sale of complete systems for drilling, completion, and servicing of oil and gas wells.  This is NOV's largest segment by revenues and has the most year to year stability due to the presence of a large backlog given the fact that there is normally significant lead time involved in new exploration projects.  Demand is highly dependent on capital spending plans by customers and overall drilling activity which drives demand for spare parts.
  2. Petroleum Services & Supplies. This segment provides consumable goods and services used to drill, complete, and work over existing oil and gas wells and pipelines.  A large number of products are sold such as drill pipe, drilling fluids ("mud"), drill bits, motors, and more.  Demand is correlated to oilfield drilling and workover activity by drilling contractors, independent oil exploration firms, and oil majors.
  3. Distribution Services. This segment provides maintenance, repair, and operating supplies to production locations.  NOV has over 200 distribution service centers worldwide and stocks a large line of consumable components.  The NOV "RigStore" concept locates facilities on offshore drilling rigs whereby the company provides the inventory and permits "just in time" purchases by the customer.  This relieves the customer of carrying larger stocks of inventory on the rig.  70 percent of the segment revenues were in the United States and Canada in 2009.

Due to the importance of the number of drilling rigs as well as the influence of oil and gas prices on drilling activity, we present the exhibit below to illustrate industry trends in recent years (along with data on the oil/gas ratio, unrelated to this article, but a subject we have covered from time to time in the past).

As we can see, exploration companies respond to incentives.  As the price of natural gas and oil increased from 2004 to 2008, rig counts increased.  The collapse in prices in 2009 resulted in a decrease to worldwide rig counts.

Historical Performance and Valuation

The following exhibit shows the past five years of performance and valuation data as reported by Value Line.  When looking at the historical record, please be aware that NOV acquired Grant Prideco on December 16, 2007 in a $7.2 billion cash and stock transaction.

We can see that overall sales per share track the active rig count statistic on a directional basis.  In addition, we can see that overall profitability has been enhanced in recent years as high commodity prices created a rush to drill more active wells giving NOV and other firms in the industry the ability to expand margins.

The following exhibit shows NOV's revenues, operating profit, and operating margins broken down by reporting segment:

It is apparent that Rig Technology is the most consistent segment in terms of delivering high operating margins and is also the largest segment by revenues and operating profits.  Petroleum services and supplies delivers consistent profitability although operating margins were depressed in 2009.  Distribution services predictably offers the lowest margins.

First quarter 2010 results (click here for 10-Q) show that this pattern is basically intact with operating margins for Rig Technology, Petroleum Service & Supplies, and Distribution services at 30.8%, 12.2%, and 3.3% respectively. Overall first quarter revenues were $3,032 million in 2010 which is a decline of 12.9 percent compared to the first quarter of 2009.  Operating profits for Q1 2010 came in at $637 million, down 11.5 percent from Q1 2009.

Geographic Distribution

The following exhibit shows the distribution of sales by geographic location for the past five years.  The United States only accounts for 27 percent of worldwide sales for 2009.  As recently as 2006, sales in the United States were in excess of fifty percent of revenues.

The chart below shows sales by geography broken down for 2009.

Impact of Regulatory Changes

The degree of geographical diversification at NOV provides some comfort against the risk that any one country's regulatory changes will have an outsize influence on overall results.  However, obviously the United States is a large market and other countries, particularly developed countries, may adopt risk averse policies going forward toward deepwater exploration.

From a regulatory perspective, the clear risk is that new policies will slow or stop deepwater exploration by NOV's customer base which will have a corresponding effect on demand for the company's products.  A lesser regulatory risk may involve mandated changes to parts (blowout prevents are an obvious example) that companies such as NOV will have to implement.  While it is likely that any increase in cost will be passed on to the customer, the dynamics of unknown regulatory changes to NOV's products and the impact on margins cannot be determined.

Backlog Characteristics

As noted previously, NOV's Rig Technology segment has a significant backlog of orders based on the long planning cycle for new oil exploration.  The company's backlog grew from $0.9 billion at March 31, 2005 to $11.8 billion at September 30, 2008, but has fallen to $5.4 billion on March 31, 2010.  Most notably, the land rig backlog comprises 13 percent while the offshore backlog comprises 87 percent of total orders as of March 31, 2010.  In general, customers cannot cancel projects for "convenience" and provide substantial down payments.  Only 3.6 percent of the starting backlog balance on September 30, 2008 has been cancelled to date.  Nevertheless, it is obvious that any extended moratorium on deepwater drilling will have a negative impact on NOV's backlog.

One important point to note regarding the backlog is that 91 percent of the total backlog is related to equipment destined for international markets.  Thus, even though 87 percent of NOV's backlog is related to offshore projects, the vast majority are for projects outside the jurisdiction of the United States.  As noted previously, other countries may very well adopt a moratorium on deepwater activity as well, so the heavy international bias of the backlog may not offer as much protection as envisioned.

A final point regarding the backlog is that a significant number of jackup rigs (those operating in shallow water) are very old.  According to NOV's latest 10-Q, 71 percent of the installed base of jackup rigs are more than 25 years old.  Since the moratorium has no impact on jackup rigs operating in shallow waters, this source of business should be unaffected by a deepwater drilling moratorium.

Conclusion

National Oilwell Varco closed on Friday, May 28 at 38.13.  The shares have fallen in sympathy with the overall sector over the past five weeks and traded above $46 as recently as April 26.  The shares are currently trading at under ten times likely earnings for 2010.  The company clearly has enjoyed healthy profit margins over the past five years and while margins and profitability were down due to lower commodity prices in 2009, overall results held up quite well.

The international diversification of NOV's business and the other factors discussed above seem to indicate that risks specifically related to the Deepwater Horizon disaster should have a muted effect on the company's future progress.  However, NOV is still exposed to overall commodity prices and industry risks.  If oil and natural gas prices crash to the lows of early 2009, exploration activity is sure to decline significantly and this will be reflected in active rig counts.  This will have a corresponding negative impact on NOV's results. The most likely scenario for a commodity price crash would be another worldwide recession, perhaps brought about by the current debt crisis in Europe.

In summary, it is not "obvious" that NOV is undervalued at current levels, but it seems reasonable to regard the company's future fate as  more tied to overall global demand for oil and natural gas and the prices of these commodities rather than to the regulatory risks associated with Deepwater Horizon.  Therefore, future panic associated with Deepwater Horizon may present an opportunity to establish a position in NOV if the shares fall in sympathy with players that are more directly exposed to the disaster.

Disclosure:  No position in National Oilwell Varco.  Please note that the author is not an expert in the oil supplies and services industry having started research in the field only in the weeks since the Deepwater Horizon incident.  The author owns shares of Contango Oil & Gas, an exploration firm with the majority of operations in shallow Gulf of Mexico waters.

Published on May 31, 2010 at 3:25 pm

Short URL: http://www.rationalwalk.com/?p=7239

Varco to Make Drilling Rigs by Kostroma

The Moscow Times

U.S.-based National Oilwell Varco has agreed to build a plant in Russia to make drilling rigs after the country slapped import duties on the equipment.

The plant, outside Kostroma, would be the first wholly foreign unit to make drilling rigs locally.

Kostroma region Governor Sergei Sitnikov and chief of National Oilwell Varco's Kostroma unit Anthony Crawford signed the agreement Tuesday, the regional government said in a statement.

Varco plans to invest 2.7 billion rubles ($83 million) in the plant, which will start work next year, the statement said.

Russia made rig imports more expensive as of this year by introducing a 10-percent duty. Russian producers of the equipment include the Uralmash Oil and Gas Equipment Holding Company and the Volgograd Drilling Tools Plant.

Chinese rivals have also made strong inroads into the market, where drilling companies like Eurasia Drilling and Integra are upgrading their hardware.

Integra's vice president for sales, Yevgeny Vlasovets, said the arrival of the new local producer would help improve quality and lower prices on the market.

The Volga River, which flows through the Kostroma area, will serve as a convenient delivery route for the heavy parts traveling from abroad to the future plant for assembly, Crawford said in the statement. He declined to comment further Wednesday.

The plant will reach full capacity by 2019, being able to produce 16,000 tons of equipment such as mobile and stationary rigs and mobile well-repair tools.

Eurasia Drilling, as part of its upgrade program, has ordered 14 rigs for delivery between 2010 and 2014, it said on its website.



Sunday, July 1, 2012

FREE CV WRITING WEBINAR - JULY 11, 6.45 PM (GMT)


Do you 'really' know how to write a great CV?

Oil Guru Recruitment would like to invite you to a totally FREE one hour webinar on how to write a fantastic, door smashing, interview getting CV. The event will take place on July 11th at 6.45pm (GMT)

In order to constantly offer you highly relevant value added services, we are pleased to be able to invite you to join a FREE and high quality webinar on "how to transform your CV into a powerful business case that explains why someone should hire you".

By attending this completely free webinar, you will learn the following:

• Why a bad CV is a list of jobs with a few bullet points underneath each entry
• Advanced thinking on CVs including how to apply relevant marketing principles
• How the requirements of a CV have changed in the last 10 years
• What employers are and are not looking for in a CV
• How to write an attention-grabbing Personal Profile / Executive Summary
• How to construct achievements and make them evidence based
• How to optimise the information architecture of your CV
• How to optimise your writing style and CV layout
• How to write a CV for the contract market that isn't 6 pages long

At the end of the webinar, you will have learned how to construct a powerful CV for the current, highly-competitive oil and gas job market that will significantly enhance your ability to secure interviews.

The webinar is being delivered by Matt Craven, Managing Director of The CV & Interview Advisors who are the UK's highest quality provider of career enhancement services. Matt is a renowned thought-leader in CV writing.

To register for this completely free webinar, please click the following link: http://www.eventbrite.com/event/3814240496 Dial in and log in details will be emailed to you on the day of the event. Calls cost just 4.3p per minute from a BT landline and you will need a telephone and internet access.

Best regards,
The Oil Guru Team

BOP Stack Organization and BOP Stack Arrangement

Blow Out Preventor (BOP) is a very important part of well control equipment and the first thing which we would like to discuss in this article is the BOP stack organization. The BOP stack can be configured in various configurations which must be suitable for the operation.

API has the recommended component codes for BOP as listed below:

A = Annular Preventer

G = Rotating Head

R = single ram type preventer with one set of rams, blind or pipe.

Rd = double ram type preventer with two sets of rams, blind or pipe.

Rt = triple ram type preventer with three sets of rams, blind or pipe.

CH = high remotely operated connector attaching well head or preventers

CL = low pressure remotely operated connector attaching; the marine riser to the BOP

S = spool with side outlet for choke and kill lines

M = 1000 psi

How can I know the BOP configuration and rating from the codes?

When you see the code, you need to read upwards from the bottom of BOP stack. Let's take a look at the following example:

15M 13-5/8" – RSRRA

This BOP stacks has pressure rating of 15,000 psi with a bore size of 13-5/8" inch. There are following BOP component from bottom to top

Rams – Spool – Rams – Rams – Annular ( see the figure below)

 You need to keep in mind that the BOP stack is able to shut the well in and allow you to perform well control operations with the greatest flexibility. Considerations of how to arrange the BOP stack are as follows:

• The BOP stack must be suitable for the drilling operation.

• The stack should be able to serve the stripping operation not just only shut the well in.

• Pressure rating must be higher than expected surface pressure on surface when the well control situation is happened.

• Excessive BOP rams cause difficulty to handle and maintenance. Additionally, the cost of BOP stack is more expensive.

• Sour gas and temperature on surface directly affects the element in the BOP's/

• The best BOP stack arrangement is the one that is suite for the operation within safety limit.

Thanks for visiting the site and your interest in oil and gas drilling

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