Shanghai Unite Steel: drill pipe

Showing posts with label drill pipe. Show all posts

2013/07/19

Drill Pipe Casing Pipe and Oil Tubing at Competitive Prices

, , are our specialty. We supply quality drill pipes, standard heavy weight drill pipes, spiral heavy drill pipes, slick drill collars, spiral drill collars, non-magnetic drill collars, seamless oil casing, ERW oil casing, and oil and gas tubing at very competitive prices. All of our , , , meet the industry standards established by the American Petroleum Institute (API). As a global supplier of quality oilfield equipment to the oil and gas industry, we ship our products around the world.

Besides the drill pipes, drill collars, oil casing and tubing, and line pipes, we supply drilling rigs, workover rigs, top drives, drilling equipment, triplex mud pumps, blowout preventers, BOP control systems, solids control equipment, etc. Please visit our company website or download our comprehensive catalog to see our full line of products.

Drill Pipe and Heavy Weight Drill Pipe

Our are in accordance with API Spec 5D and our are in accordance with. We supply full API size range of drill pipe and heavy weight drill pipes from 2-3/8 to 6-5/8 inches. Our heavy weight drill pipes include integral heavy weight drill pipes and welded heavy weight drill pipes. The steel grades of our drill pipes include E75, X95, G105 and S135. In addition, we can add hardbanding and internal coating by request. We also sell various tool joints and drill stem accessories including pup joints, lift subs, crossover subs, and reamers etc.

Drill Collar and Non-Magnetic Drill Collar

Drill collars are made with material AISI 4145H in accordance with API Spec 7-1. We supply slick drill collars and spiral drill collars; their sizes are from 3-1/8 to 11 inches.

Contact Us:

Email: chuckyan@gaslinepipe.com

Skype: chuck.yan1

Tubing, Casing & Drill Pipes Supply

We provide a variety seamless and welded petroleum industry casing, tubing, sucker rods and drill pipes with various end connections. All of our OCTG (Oil Country Tubular Goods) products are manufactured to the API specifications.

Some of the and casing available for your company’s requirements include:

General drill pipes, casing pipes and tubing conforming to API standards for oil field and deep well drilling
API H40 tubing/pipe – general purpose pipes conforming to API specification 5CT
API J55 general purpose pipes for tubing applications, similar to specification K55 with lower minimum tensile strength conforming to API specification 5CT
API K55 general purpose pipes used primarily in casings conforming to API specification 5CT
API L80 tubing/pipes conforming to API specification 5CT with a controlled yield strength with hardness test requirement of 23 HRC maximum; usually used in wells with sour (H2S) environments or deep sour wells
API N80 or N80 Q&T (Quench and Tempered) – general purpose pipe manufactured to API specification 5CT
API Normalized N80 – lower-cost alternative to standard Q&T N80; pipe walls less than 0.500 inch; inspections, testing and dimensions are in accordance with API 5CT for grade N80. Charpy v-notch impact test absorbed energy results conform to API SR16 and are lower Q&T N80
API C90 – an API controlled yield strength grade (25.4 HRC maximum) generally used in sour condensate wells; with required extensive hardness testing, SSCC testing per NACE Standard TM-0177-Method A; minimum threshold stress required is 80% of specified minimum yield strength
API C955 – same strength range as T95 and U. S. Steel C95, but without a hardness requirement; generally not used in sour wells
API T95 – API controlled yield strength grade (25.4 HRC maximum), the same as API C95 and U. S. Steel C95; generally for use in sour condensate wells; extensive hardness testing is required including SSCC testing per NACE Standard TM-0177-Method A; minimum threshold stress required is 80% of specified minimum yield strength
API P110 – generally used in deep wells; this grade is not suitable for most sour condensate wells
API Q125 – API grade for deep well service, generally not for use in sour condensate wells; quadrant hardness testing is required (no specified hardness limits other than the variation between readings); impact testing required for each heat and/or lot; typically EMI and UT NDT inspections are required

Contact Us:

Email: chuckyan@gaslinepipe.com

Skype: chuck.yan1

2013/06/26

High Quality Drill Pipe

Application:Heavy weight drill pipe (HWDP) is usually run in between the drill collars and the drill pipe in order to prevent fatigue of the drill pipe in the vertical drilling industry. Heavy weight drill pipe is also utilized in the horizontal directional drilling (HDD) industry for added strength in high stress situations. Heavy weight drill pipe (HWDP) may be used to make the transition between the drill collars and drill pipe. The function of the HWDP is to provide a flexible transition between the drill collars and the drill pipe.

Introduction:

Heavy weight drill pipe has a “center upset”, also known as wear pad, that increases tube life by protecting the tube from wearing on the outer diameter by keeping the tube away from the hole wall. It also reduces hole drag and differential sticking problems. The walls of heavy weight drill pipe are thicker and have longer upsets compared to conventional drill pipe, as well as being stronger with high tensile strength.

Application:

Heavy weight drill pipe (HWDP) is usually run in between the drill collars and the drill pipe in order to prevent fatigue of the drill pipe in the vertical drilling industry. Heavy weight drill pipe is also utilized in the horizontal directional drilling (HDD) industry for added strength in high stress situations. Heavy weight drill pipe (HWDP) may be used to make the transition between the drill collars and drill pipe. The function of the HWDP is to provide a flexible transition between the drill collars and the drill pipe.

Quality Standard: API 7 and API 5DP

Steel Grade:

Integral HWDP : AISI 4145HM
Welded HWDP : AISI 1340 pipe body, AISI 4140HM tool joint

Sizes Range:

Outer Diameter: 2 7/8” – 6 5/8”
Weight Range: 6.27#/FT through 27.72#/FT
Lengths: Range 2 and Range 3
End Finishes: Internal Upset, External Upset, Plain End Upset, Non Upset
Tool Joint type：NC38、NC46、NC50、5-1/2 FH

Feature:

A. High precision in size and shape
B. Good low temperature toughness
C. Excellent comprehensive mechanical properties
D. High connection strength and sealability
E. Large inside diameter of tool joint
F. High torque resistance
G. High fatigue strength and long fatigue life

Internal Coating Feature:

A.High abrasion resistance and low friction factor
B. Good adhesion and flexility
C. High application temperature and pressure
D. High hardness and impact resistance
E. Good corrosion resistance

Hardbanding Feature:

A. Good balance between antiwear and friction-reduction
B. The wear rate is less than 6% of that of bare tool joint, which can prolong 3 times of the tool joint service life
C. Good property of friction-reduction, which can reduce the casing wear to the least, and its wear to casing is less than 11% of that of bare tool joint
D. Reduce the torque of drilling string
E. Good weldablity with little splash and good rewelding preformance
F. Friendly to environment

Options:

Internal Plastic Coating
Hardband Type especially on box and pin tool joint
Proprietary Connections
Make and Break Test

Mill Test Certificates:

Issued in accordance with API Spec 7/7-1 and API RP7G .
Third Party Inspection can be performed on request at buyer’s care and expense.

Recommendations for running heavy weight drill pipe:

When run in vertical holes for weight:
1. Run the necessary number of joints to provide the required weight plus enough more joints to ensure the transition point stays in the heavy weight pipe.
2.Do not run in compression where the hole size is more than 4″ larger than the heavy weight tool joint size.

When run in the transition zone between pipe and collars:
1. Run a minimum of 18 to 21 joints.
2. Utilize the manufacturer’s recommendations for the maximum drill collar size to be run below the heavy weight.

When run in directional holes for weight:
1. Run the necessary number of joints to achieve the desired weight on bit. (It is not uncommon to run as many as 60 joints in this application.)

www.gaslinepipe.com

OCTG - Casing, Tubing, Drill Pipe

Casing tubing drill pipe is one of the seamless casing and tubing specialties of OCTG in the category of seamless products that are specially made. Casing tubing drill pipes have a diameter of 2-3/8-13-3/8inches and thickness of 0.19-1.00inches. Drill pipe of this kind are of the steel grade quality, the precise grades you would find with OCTG casing pipes are, H-40, C-90, J55/K55, N80, L80, C-95, P11. Tubing drill pipe of this kind are especially sued in the oil field industries where there are specific areas that these pipes need to cater to. Tubing drill pipes ensure thread connections of various kinds including the following categories,

· Integral thread seal connections

· Extreme line

· VAM premium connections

· Integral connections

· API (STC and LTC)

· BTC

· Integral metal seal connections

· Threaded connections

· Coupled connections

The is a special product with an exclusive model number of WSP204 available in a series of variant sizes so that the users can use the pipes for their specific needs as and when required.

The standard pipe types for the drilling purposes are the API SPEC 7 and the API SPEC 5D. Pipe of this category may either have an IEU-internal & external upset or an EU-external upset. Available in three main grades of E-75, X-95, G-105 and S-135 these pipes have a very high demand in the market specials with the off-shore oil drilling companies and are used for packing bundle.

OCTG Casing Thermal Insulation Oil Pipe is precisely used for the specific and complex purpose of hot well drilling. Pipe of this kind are available in the market in just two sizes being OD 3 1/2inches and 5inches respectively. The grades available in the market for the Thermal Insulation Oil Pipe is just two, N80 and P110! As far as the standard of this pipe is concerned, it can work successfully under WSP tentative technical delivery circumstances and any related situations and used for bundle and bulk uses precisely.

The Premium Connection Series is a special range of casing tubing accessories that are manufactured and marketed by the Oil Country Tubular Goods Supply. The series is retailed under the model number of WSP303 and there is a huge range of an assortment of complicated purposes that these accessories are used to take care of.

Take a look at the usage scope of the Premium Connection Series casing tubing accessories,

· The Premium Connection Series that includes both tubing and casing parts are used large scale in high pressure oil wells.

· Casing tubing accessories of this series are used in the high pressure gas wells as well.

· Deep and over deep wells are another place where casing tubing parts of the Premium Connection Series find a very significant use.

· Drill accessories of this kind are used in high collapse wells and hot well-drilling wells as well.

· Drill pipe of this kind come in handy when digging oriented wells and specifically over-clint wells that are horizontally dug.

The standard pipe qualities of this kind available in the market are, Non-API standard and API 5CT. Casing pipe sizes available are OD 2 3/8" to 13 3/8". So the companies enjoy the chance of picking on just any size that will go aptly with their tubing requirement. Tubing grades for the Premium Connection Series N80, L80, T95, P110 and J55, K55.

Casings for drilling pipe are another of the popular drill accessories and manufactured and marketed by the Oil Country Tubular Goods Supply. There are as many as 6 different grades of this pipe casing available in the market which are,

· J55

· K55

· N80

· L80

· T95

Some of the other information in the context of these pipe cases is as follows. Take a look at the following table which will give you brief information,

Sizes of Casing: OD 4 1/2" to 13 3/8"

Type of threading of the pipe: STC, LTC, BTC, WSP-1T

Tubing Pipe length: R3 10.36-12.20 (34"-40")

Standard of the Pipe: API 5CT, API 5B

With so many variant kinds of accessories available, no wonder the Oil Country Tubular Goods Supply is one of the biggest names who are seeked after by both public and private concerns when it comes to oil drilling works.

Drill Pipe

Unitesteel Drilling provides a complete line of drill string products, including a full range of jointed drill pipe in nominal sizes from 2-3/8" to 6-5/8" and in a wide range of wall thicknesses.

Unitesteel Drilling drill pipe is designed to provide superior technical performance and a service lifetime exceeding most current industry standards. Unitesteel Drilling drill pipe is available with:

Proprietary oversized minimum internal upset (miu), for better fatigue resistance (where applicable);
Longer tool joints, providing a maximum re-cut capability for longer service life; and

Higher toughness specification on pipe body, weld and tool joint, providing greater safety margins in extreme drilling conditions.

Unitesteel Drilling tool joint forgings meet or exceed API specifications and tolerance requirements. Each joint is inspected to guarantee visual and dimensional properties, and tested to ensure proper mechanical characteristics. All Unitesteel Drilling tool joint forgings are:

100% thread-gauged;
100% magnetic-particle inspected;
Phos-coated (anti-galling treatment); and
Hardness-tested.

Do not hesitate to contact our sales representatives with special needs to evaluate feasibility.

One of the most critical sections in welded drill pipe is the transition zone between the tool joint and the pipe body. A smooth, gradual transition linked to the superior nature of the purity of our steel ensures minimum stress concentration and greatly improves the fatigue life of the pipe.

100% thread-gauged;
100% magnetic-particle inspected;
Phos-coated (anti-galling treatment); and
Hardness-tested.

Do not hesitate to contact our sales representatives with special needs to evaluate feasibility.

Our Drill Pipe

In business and in life, we all strive to get the most value for our dollar. We weigh price, availability, and quality. We offer competitive pricing without sacrificing quality in materials and workmanship. Our drill pipe is manufactured utilizing raw materials that are purchased in quantity from reliable reliable sources. API drill pipe sizes meet or exceed E75 specifications. Tool joints are 4140 quench & tempered alloy steel. We can offer drill pipe manufactured to API Sec 5D with complete specification packages.

The manufacturing philosophy is based on employing skilled craftsmen to produce parts to specification and utilizing optimal manufacturing methods and equipment to reduce costs. These manufacturing methods and equipment investment are instrumental in being able to offer these quality products at competitive pricing.

All of the above is backed by engineering and quality assurance.

Check our material specifications against other manufacturers and suppliers. Those listed above meet or, in most cases, exceed those typically found in the waterwell, mining, or construction industries.

Material traceability insures that the materials are of the correct chemistry and heat treatment. This is not only important to the integrity of the drill rod but especially important for the friction weld process to be completed successfully.

Check our material specifications against other manufacturers and suppliers. Those listed above meet or, in most cases, exceed those typically found in the waterwell, mining, or construction industries.

Our engineering department insures that the materials are of the correct chemistry and heat treatment. This is not only important to the integrity of the drill rod but especially important for the inertia welding process to be completed successfully.

Most manufacturers of waterwell, mining, and construction drill pipe do not have an engineer on staff. The importance is in knowing that your purchase has the properties you desire with being technically sound. Or, good advice when there may be potential problems with a desired design.

Most manufacturers in the China do not have an active quality program. We like to refer to these as a “passive” quality program. A “passive” program waits for a problem to appear in the field and tries to determine if it is a one time event or a procedural or material problem. This may be OK, unless you are the one that has the problem.

An “active” quality program utilizes material traceability, inspections, testing, and skilled employees to insure that problems do not leave the plant. Our system of inspections of materials and workmanship along with a management commitment towards quality works toward shipping products free of defects in workmanship and materials.

Not only do we have the manufacturer’s vast resources but we also offer over 10 years of experience in the drill pipe business.

We specialize in drill pipe and drill string components. We have product knowledge to help you choose the best drill pipe for your application. After all, what you ask for may not be what you need. We ask the necessary questions to determine that your purchase is the best for your application.

We are very familiar with the various drill rig make and models along with the correct drill pipe design required to run on those rigs.

By purchasing your drill pipe from Unitesteel, you can be assured that you receive a product that has been engineered for your application and manufactured with quality – a product that is a notch above the rest.

OK. So how much will these extra features cost? We believe our products are competitively priced. Email us today for a quotation.

www.gaslinepipe.com

Troublesome Thread Problems

Thread problems are the most common problem encountered with the use of drill pipe. The purpose of this section is to help locate potential causes and correct them. It is important to note that an exact cause may not be found but the problem can be made to go away.

One of the characteristics of thread problems is that it spreads throughout your drill string. This happens as one damaged thread connects with another. If the top sub becomes infected, then the problem propagates with every connection made with the top sub.

When a thread problem is discovered, it is important to remove the drill rod with the damaged connection and inspect the other drill pipe in the string.

Over torque is a common cause of thread problems. One way to prevent this is to torque the connections to the designated make-up torque. Make up torque is the amount of torque needed to properly tighten the connections so they act as a unit.

Most over torquing does not occur at the table. This most commonly occurs when the drill pipe is run down the hole loose i.e. when not enough torque is applied at the table. Under torqued connections tend to continue tightening down the hole and can over tighten.

Indications of over torque are swelled or mushroomed box end shoulders. Another indication is that the pin connection will stretch or break.

Galling can occur for a variety of reasons. Galling is caused by metal to metal contact between the pin and box threads. When this happen, the metal from the one thread is “picked up” by the other. Sometimes, this is minimal and the connections appear to work OK but create problems later.

A good grade of tool joint compound will prevent galling – if it is kept clean and applied at every connection. Tool joint compound is not an area to skimp on quality.

Sometimes galling is caused by stabbing. Stabbing is the term used to describe bumping the connections too hard when making connections. This can cause the thread crest to slightly “roll over”. If this “roll over” is significant enough, it will gall during make up or perhaps peal off creating an obstruction. This obstruction can be mashed during make up and create galling.

Cross threading can occur when the connections are not properly aligned when making up. Typically, when this happens, the connections will not shoulder and will be difficult to break.

Care during make up can prevent this type of damage.

What to look for

Drill pipe connections can be screwed together by hand. Sometimes there can be a slight gap – less than 1/8” that would require more torque than can be done by hand.

When making up the drill pipe, keep an eye on the holding wench. When the connections begin to be in a bind, it is typically noticed when the holding wrench or slips move to one side.

There are several factors involved:

Manufacturer
Operator
Rig
Drilling Conditions

Obviously, if the manufacturer does not manufacture the connections and drill rod per specifications, this can cause problems. When machining rotary shouldered connections, several characteristics are involved. There is the size, thread form, and taper that must meet specifications.

At one time, threading tools were basically made by the machinist. They ground their tool steel threading tool to match the thread form using a sight gage. Any more, just about every one utilizes pre-made threading inserts that automatically provide the correct thread form. Even though, care must be taken to make sure these tools are discarded when wear becomes significant. Worn threading inserts can lead to incorrectly machined connections.

The taper is typically within tolerance when machining on a CNC lathe. If threaded on a manually operated lathe, the taper is set by the machinist. With use, the taper attachments can wear causing the taper to be out of tolerance. Another possibility is that the taper attachment could be set incorrectly or the markings on the attachment are not accurate due to wear.

The size of the connection is very important. Typically, the blanked connection ( this is when the connection is ready for the actually treading) is measured to insure the size is correct. After the threads are machined, the connection is gauged utilizing an API-approved, hardened, ground thread gage. Since the connections are tapered, they are measured by the “stand-off” for the pin connection or “stand-in” for the box connection. The pin stand-off should be between 0.620” to 0.635”. The box stand-in should be 0.000” to 0.010”. This gage does wear and must be properly maintained.

Gauging the connections typically insures the connections are machined correctly as long as the taper & thread form are correct. That is a rather big “if” as a connection with thread form or taper problems can be machined to gage correctly even though it is not correct.

There are other manufacturing issues that can lead to thread problems. These include machining the connections to run true with the OD and the tool joints properly aligned with the tube. Connections can be made correctly but get damaged during the manufacturing procedures.

A good inspection procedure can catch most manufacturing problems.

Determining whether your problem is a manufacturing problem is not always obvious. You really need to depend on the manufacturer to inspect and make the determination that there was a manufacturing problem.

If you have some unused drill rods from the order, these can be closely inspected. If the problem was not just a one time error, these unused rods should have the same problem.

Once a connection has been used, it can no longer be accurately gauged. Also, if new connections have some anti-gall treatment such as phosphating, they can not be accurately gauged even if unused.

If the manufacturing problem is due to many of the factors listed above, the manufacturer may have experienced problems elsewhere and be aware of the potential for problems in the field.

From the manufacturer’s standpoint, if the thread problem is wide spread in your drill string but not elsewhere, they will tend to point towards other factors. This is logical and you should not be offended. With problems existing with only your drill string, I would typically consider manufacturing problems as a possibility but not likely.

Manufacturing defects should appear within the first few times the drill rods are used.

In any case, if you are not happy with your manufacturer’s results, you can hire an outside consultant.

Operator error is probably the most common cause. Many problems can arise from stabbing, under-torquing, cross threading, lack of use of a good grade tool joint compound, and un-clean connections. With carousel rigs, there is not just the connection at the table to consider but also the connection at the top of the mast – one you can not see.

Not noticing problem connections and removing damaged drill pipe from the rig can lead to complete destruction of the drill string. Not maintaining the top sub can also lead to problems.

One of the more critical times for an operator is when new drill pipe is added. A break in procedure should be followed to help these new threads survive their first few connections. New threads are not as forgiving as threads that have been in use and worn in.

Another critical time is when starting up a new drill rig with new drill pipe. Not only should the drill pipe be cared for as above, but the new rig will probably not run like your old rig.

The operator standpoint is typically that they have been operating their rigs for years without thread problems. If thread problems arise, especially with relatively new pipe, the operator may believe that the problem must be with the drill rods. However, this is not always the case.

Rig alignment is also an important, often overlooked, factor. Here we are looking at how the threads of the drill rod in the table align with the drill rod in the head. If this alignment is not correct, it will put undue pressure on the threads during make-up and break out. Even if this does not produce obvious thread problems, it will wear your connections prematurely.

Checking the rig alignment should be added to you periodic rig maintenance schedule. Check with the rig manufacturer to see how best to correct any problems.

For carousel rigs, alignment at the top is just as critical.

Drilling conditions can create problems. Difficult drilling conditions can add extra stress to the connections. Sometimes this can lead to pin or box failure.

Stress is accumulative. As the connections are stressed over time, the pin can snap off at the base. The box end can also beak off – typically at the back of the connections.

A variety of things can happen down hole that can be detrimental to thread life. Difficult conditions can lead to over torque. A sudden lead off by the bit can put excess stress on the connections.

When thread problems occur, probably the first thing to do is to inspect your drill string. See how far spread the problem has become and remove drill rods with damaged connections. Inspect the top sub and other tools.

If the drill pipe is relatively new or you think it could be a manufacturing problem, contact your supplier and get them involved. Digital cameras make for a relatively easy way to give the manufacturer a fast look at the problem.

Meanwhile, check all of the other factors mentioned. You want to be sure that when new pipe is put on the rig, that any problem issues have been resolved. If you think it could be a rig issue, get a serviceman out to check it out.

When everything is considered, we may still be scratching our heads as no one cause has been found. It could be that by looking everything over and making a few minor adjustments could have eliminated the problem. Maybe a one time event happened causing damage that was not discovered until it spread.

In any event, by checking out all of the possibilities, you increase the likelihood that the problem will disappear.

www.gaslinepipe.com

2013/06/25

About Unitesteel

Unitesteel is a leading supplier of tubes and related services for the world’s oil and energy industry and certain other industrial applications. Our mission is to deliver value to our customers through product development, manufacturing excellence, and supply chain management.

Our customers include some leading oil & gas companies as well as engineering companies engaged in constructing oil & gas gathering, transportation and processing facilities. Our principal products include casing, oil tubing, drill pipe and drilling tools.

We are committed to integrate engineering steel resources in china and serve the global engineering steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national famous steel enterprise.

In the aspect of resources and information, we have established cooperative and stronger relationship with nearly hundred enterprises, either state-owned or private owned in china, such as:

DAYE Special Steel-a famous steel enterprise with the longest steelmaking history;
BAO Steel, and Northeast Special Steel Group-the biggest special steel manufacturer;
TPCO, VALIN- largest seamless steel tube production enterprise;

What’s more, we have built long, deep and close business relationship with dozens of steel company, Sharing and holding equities with several steel enterprises. Because of the close cooperation with steel companies and our pioneering spirit, which can ensure us stay at the top competition, and ensure our customers get what they really want!

Chuck Yan

Sales Manager

chuckyan@gaslinepipe.com

MSN: chuckyan1@hotmail.com

Shanghai Unite Steel Trading Co., Ltd.

Address: Room 1109, Green Land International Plaza, No. 275-8 Guoding East Road, Shanghai 200433, P.R. China.

Tel: 86-21-35316963

Fax: 86-21-35316961

website: www.gaslinepipe.com

www.shunitesteel.com

www.shunitesteel.com.cn