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OCTG Pipe Suppliers
26 December 2016
Hello Everyone,

Hope everybody is enjoying holiday season with the loved ones. I wish the 2017 be a kicker in the oil industry and things pick up in all sectors.

Can anyone name a few reputable OCTG pipe manufacturers? I guess the most competitive ones are in China however, not all of them have the same quality control process. 
We're looking for supply of OCTG tubulars from 2 3/8" to 30". Requirements would be 
Various grades, weights, connections, Seamless and welded, High collapse, Sour service, etc.
what manufacturers you recommend based on your previous purchase for your projects? 

Looking forward to hearing from you.


12 answer(s)
SPREAD Associates
Total Posts: 155
Join Date: 05/03/08
Hi Gaz,

Having had experience of Chinese Mills, I fully agree with Jason Pinto's comments!

A few points to back up what others have mentioned;

A) It is important that you have machine shops readily available that can cut the connection you choose. Make sure they are approved by the vendor as sometimes they can cut the connection, but can't get the gauges required to inspect the connection. Also, make sure there is an approved inspection company readily available that can inspect your pipe after delivery to your yard and also on location prior to running.

B) If the casing connection is not common, then make sure you have sufficient cross-overs for items such as the float equipment, liner hangers, stage collars, external casing packers etc that you may use. These cross-overs should be included in the SOW of the original ITT.

C) Identify what casing pup joints might be needed ahead of time and include them in the SOW of the original ITT. Order some spare for last minute things such as the unplanned for running of a stage collar.

D) Order some spare couplings. It's not uncommon for a thread shop to be able to cut the pin, but not the box on a connection.

E) Consider what varnish you want the Mill to apply. They will usually put on a varnish that is suitable for transportation and storage, but not necessarily good for the casing / cement bond.

F) Think about the logistics of transport, especially how you want the pipe transported from the Mill to your delivery point. One vendor strongly favours containerised transport, which is good in theory, but a nightmare if the delivery point does not have the correct equipment to unload the containers. This also goes for when specifying the joint length. As Augusto mentioned, having 45' long joints has a lot of advantages at the rig location. However, this length requires special trucks if the pipe is going to a land location and in some areas, these trucks are expensive and not readily available. Also consider what type of thread protectors you want installed plastic / steel / open or closed ended.

G) On a similar note to the above, think about pad eye placing and rating for the Conductor pipe. Do you want just transportation pad eyes, or to have them rated & certified so that they can be used to run the pipe as well? Also the type of pad eyes. Removable pad eyes are available, but for a low cost land operation it may be cheaper to just burn them off in the RT before running. 

H) Consider splitting out the 18 5/8" and larger sizes into a separate ITT. There are several very good Companies out there which specialise in connections for larger pipe, whereas the like a Tenaris and Vallourec normally either no bid or supply through a 3rd party.

I) If, as it looks like, you are combining the Casing & Tubing into one ITT, then obviously get the Completion Engineers input as to X/O's, pup joints etc as they will have many more requirements.

J) Consider including water bushings & circulating head in the ITT, especially if the thread is one of the less common ones. Consider the pressure and load rating you need these to be rated to. I normally specify a circulating head with the same connection as the top-drive and load rating above the anticipated casing running weight. Got me out of a bind more than once on a remote location.

Best Regards

Myspread Users
Total Posts: 2
Join Date: 17/11/16
There have been many good responses here and shared information. Having lived and worked in China for 10 years I can offer the following simple advice. The Chinese are capable of delivering top class products. On nearly anything including premium connection pipe. But you have to INSPECT if you EXPECT to get anything of value at the end. You must have an inspector there nearly the whole time to insure they meet spec. And a real inspector not a guy there for a boondoggle. I have real horror stories with chinese made pipe to share but this is not the right forum. And don't assume that because they did it right the previous 99 times that the 100th time doesn't need inspecting. TH Hill or someone similar is costly but absolutely mandatory. Bao Steel and TPCO are two favorites but there are others. Good luck.
Managing Director
Vartech Eng
Total Posts: 21
Join Date: 06/07/15
Hello Gaz,

I have good experiences and good learning experiences with OCTG mills in China.  You can get good mills, some of them mentioned in previous replies.

One issue si that some mills do not have all the certifications for the pipe or threads you would require; it would take quite a good time (and some upfront investment) to complete the qualification process. 

If you want to speed-up the process, then you may go for the mills you already now and see how you can work out the commercial issues with them.

Going further, to work with new companies, I recommend you to follow the complete design and selection process for all the materials and connections.  Also, consider other pre-operational, operational, and post-operational factor.

I recommend to keep in mind other parts of the well design requiring casing crossovers, pup joints (landing strings, casing hangers, and so); we selected a casing /thread type it is convenient to have access to a machine shop to get connections / pup joints, casing wedges / water business cut. It is important as well to considering having technical services while running casing with "new" connection-types  for you operation.

I would suggest also considering the post-operational issues regarding repairs, disposal of thread protectors, storage of OCTG, buy-back options, and so.

Hope this helps.

Thanks and regards,

Reynaldo Vargas
Drilling Consultant
Total Posts: 24
Join Date: 08/01/16
Hi Augusto, Arjan, Chris, Jerry, Dave, Paul.

Thanks for your feedback. Lots of information was exchanged and some new technologies were introduced. 


General Manager
Oil States Industries, Inc.
Total Posts: 2
Join Date: 30/06/11

Hi Gaz

Up front disclosure, we at Oil States supply the larger sizes of the range you are looking at (18-5/8" - 30" or larger).

Taking into account the key points made above WRT Design first, then enquiry later, it may be useful to know that there can be quite a bit of flexibility in wall thicknesses and casing strengths if you have drift vs pressure factors to balance and lead times for special runs presently are not over the top. So it can be useful to have some contact up front with suppliers before settling on optimum design. What you see on the on-line sizes is often only the basic stuff.  


Paul Riordan

Managing Director (
Relentless Pursuit Of Perfection Ltd.
Total Posts: 469
Join Date: 10/01/05
** This response from Miguel Rosato, based in KL **

"MITA and Sumitomo manufacture in China with excellent results. I presume they are also very good in terms of pricing."

.. and from another colleague:

"Tenaris and Vallourec, used all over the world in the most demanding drilling environments"
Mentor to the youth of our industry
Total Posts: 131
Join Date: 27/02/08
Is Grant Prideco too obvious an answer?
Drilling Advisor
SPREAD Associates
Total Posts: 14
Join Date: 13/07/14
Gaz - Tenaris and Vallourec are high quality worldwide suppliers in competition with Chinese steel like Bao Steel.
Tercel Oilfield Products
Total Posts: 1
Join Date: 10/11/16

Hello Gaz, please find below information from a different approach, an alternative for steel casing.

High Strength Composite Tubulars

A major revolution in Tubular Technology is here, disrupting the Industry. Instead of chemically treating for H2S and CO2, or coating pipe to postpone decomposition, now you can Conquer the Corrosion Challenge by Eliminating the issue fundamentally, with a first of its kind, Non-Metallic Tubular, its name is HSCT, an acronym for High Strength Composite Tubular. A decade’s work in the laboratories of Akiet is now available to the Industry. This Breakthrough Technology thrives in the most extreme downhole conditions, not for 5 years, not for 20 years but for the life of the well! The brilliance is in the simplicity; this composite is made of Glass and Epoxy that are Naturally Inert to Chemical Attack. Akiet’s Unique Centrifugal Casting Method produces ID and OD finish too smooth for scale build up, maintaining maximum flow rates with reduced frictional losses. Unlike traditional fiberglass GRE pipe, HSCT is free from voids, making it stronger and less vulnerable to chemical attack. Better performance at 85% less weight than steel. Would you like to learn how this lightweight pipe can outperform its heavyweight competitors? Explore all HSCT’s Features and Benefits, manufacturing process, FAQ’s and the remarkable journey from Lab to the Field. - See more at:

Please drop me a line if you need more information.


Arjan Bakker

Consultant [retired Shell staff]
SPREAD Associates
Total Posts: 277
Join Date: 02/09/05

0. In the past, the Composite Catalog of Oilfield Equipment & Services was the vehicle to find most of the Oilfield Suppliers. OCTG are available in America, Europe & Far East, but each can play on a different league. That is the easy bit. For the subsequent steps here are two generic and one specific guidelines

A. Drilling equipment purchasing


1.                My standard recommendation is to pre-quality drilling related designs and manufacturer before asking for commercial quotations.  This to encourage more innovative designs to come forward and to discourage low quality and/or copy-cat designs. 

In the pre-qualification stage a quality phase, scaled drawings, stress calculations and testing data are a must.  After approval the vendors are then invited to submit a comprehensive commercial quote covering specifically the agreed design and quality plan.


2.   We refer now to an article appeared in "Process Engineering" March 1985, entitled "Going for open tender on plant equipment" by J. Fawbert where the following steps, similar to ours, are detailed:


  -  Tender evaluation involving tender documentation, rules for pre-qualification, preliminary evaluation and short listing.

-  Final tender involving site visits to short listed bidders, standardization of bidders' offers and selection.


 3.   Tender evaluation stages


  Tender documentation - Structural design, mechanical solutions, life expectancy, quality plan and environment to be included.


  .  Pre-qualification rules ask for previous experience,  technical innovations and service support.


  .  Preliminary evaluation should audit the design proper against existing equipment failures.  These are normally attributed to misuse (35%), mis-machining (15%) and last  but not least, incorrect design (27%).  However, it must be borne in mind that most of the operational abuse,     improper maintenance, lack of quality in manufacturing stem from a sub-optimum design.


     Feed back and cooperation at all levels between User and Vendor is the only way to improve this situation.


     For instances, a simple 'environmental test' of a prototype can be an eye opener vis-a-vis engineering appraisal of designs.


  .  Short listing should look at mechanical aspects, structural design, weight and room requirements, ease of machining, inspection and service.


  4.   Tender proper


  .    Site visits to short listed bidders - This is mainly to assess the level of cooperation among the design office, shop floor and service end of the facilities, e.g. for environmental testing.


       Potential design short-comings and eventual design improvements can be discussed.          

       (It is worthwhile the looking at the "Rejects" and "Spare part" market to assess reliability.  The delivery records are also a useful indication).


  .    Standardization of bidders offers - where the original specification are refined and made uniform.


  .    Selection - The comparison now should weigh technical evaluation, delivery and cost in that order.


  5.   It is worth noting that the article which parallels our views relates to coal industry.  


B. Technical acceptability of new products/vendors


  Different operators continuously query on the accept-ability of new vendors or new design and for application in  their operation.


  Our philosophy is to support new ideas provided they are well engineered and remain financially attractive.


  Prospective vendor should however provide the following:


  1.  Design parameters and scaled drawings

  2.  Analytical guidelines - (e.g. Finite Element Analysis)

  3.  Fatigue resistance.

  4.  Rating procedures

  5.  Prototype test results, third party witnessed

  6.  Quality plans.          

When the assessments are favorable a pilot test could be conducted provided the cost competitiveness criteria are also met.


C. Technical suggestions for ordering API* Tubular Goods


     To complement API Spec 5CT suggestions for ordering casing or tubing, a Technical recommendation which reflects worldwide experience - recognizing that tubular goods are a 'specialty' often ordered under API Spec 5 CT 'commodity' guidelines .

     Find below these additional guidelines.

The evaluation of the commercial implications should be carried out in cooperation with the relevant mills.


     1. OD tolerances: rather than the API combination OD-0.5%, OD+1%, it is recommended to stick to the following combination OD- 0.5%, OD+0.75%.

     This reduced upper limit should be imposed, not only for roundness but mainly to ensure interchange-ability with ancillary equipment.

     The OD should be checked with a 'go/no-go' gauge like the bit caliper and not with a 'PI' tape which allows oval pipe.  

     (THE 'pi' tape measures the circumference of a circle but is calibrated in terms of its diameter). The background to this is that the API Spec 5A - forerunner of API Spec 5CT - referred to OD tolerances as nominal.

Length and leak resistance. Exxon's proposals to API via E+P Forum should be adhered to. API Task Group/92 suggest making it a Supplementary Requirement (item 2221).


     3. Range length:     API Range 3 length varies from 34' to 48'. If a mean length of 45' is specified it speeds up running casing, as it minimizes connections - potential leak paths - and allows better dilution of thread costs, less handling and the possibility of doubles on mast - attractive in some work-overs: tubing stands - and when casing has to be round tripped. Operators could take advantage of large pipe rack areas to prepare doubles on the rack to ran as 'false singles' through the 'V' door, as USA did with API tubing (4.5'' and smaller) that does not cover range 3. This is another reason to deviate from API specifications.


     4. Toughness requirements:    Bearing in mind perforation requirements on tubular goods and wedging of slips  - of packers, liner hangers, wellheads, cement retainers and bridge plugs - a minimum impact strength for any of the full size transverse samples shall be of 15 ft-lbs Charpy energy, not only for Group 3 (formerly 5AX, extra Yield strength P 110) and part of Group 1 (formerly 5A: J 55 and K 55 ) but also for  the remainder of Group 1 Grade N 80 and Group 2 (formerly 5AC, restricted chemistry) - C 75, L80, C 90 and T 95.

     API Spec 5CT makes it mandatory to Group 4(formerly 5AQ) - Q 125, only. (API committee on standardization of tubular goods Task Group ITEM NR. 2213)


     5. Pup joints:       Long deliveries and costly pup joints can be expected if bar stock is used to machine them.

     Mills should be encouraged to supply pup joints - even if plain ended - making not only better use of rejects (saving the good sections of the faulty joint) but also providing identical raw material for the pup joints.(Jointers can be used to make the required length for threading machines).

     Incidentally, threads on ancillary tools (casing hangers, stage collars, float equipment, wire-line nipples, Side Pocket Mandrels, Blast joints and flow couplings) must be cut either by integrated mill or by the recognised licensee that cut the threads on the pup joints.


     6. Alternate drift:  API Spec 5CT table 6.0 refers. World wide the following combinations are common: 13 3/8'' 72 LBS/ft,  9 5/8'' 53.5 LBS/ft and 7'' 32 LBS/ft. Alternate drift allows the use of more common bits -     12 1/4'', 8.5'' AND 6'' - improves flow-by area around close-fit ancillary equipment - liner hangers, packers, etc - and enhances roundness and leak resistance.

     In this vein, longer drift mandrels are required. API recommend 6''-12'' drift length for casing, however, as some of the API casing is used as tubing - 7'', 5'' very common production strings - drift MUST be longer.  THE EQUIVALENT TO API TUBING DRIFT MANDREL 42'' LONG IS suggested.


     7. Matched Strength Connections:     API couplings are either regular - nominal pipe OD+1''- or special clearance. The above dimensions and price should include the required qualification test. The then internationally accepted qualification standard is API RP 5C5, which establishes 4 levels of acceptance: IV (3 specimens and differential working pressure below 4000 psi), III (12 SP, 4/8 KSI),II 24SP, 8/12 KSI) AND I (27 SP, MORE TH.12KSI). We must optimize the API Qualification test procedures, streamlining time and expense associated with qualification tests. Listing of qualified connections are available from reputable Vendors.

     Qualification tests for steam injection are even more severe and more revealing. There, a lot can be learned from torture testing connections.


     9. Chemical composition:     It is essential to get from the manufacturer, the complete chemistry - aim and actual - to assess if modern steel making technology is being used.

     Levels of Sulphur, Phosphorous, Manganese and Carbon could be revised downwards for steel cleanliness, in line with API TG item Nbr 1035.

 For instances, E+P Forum suggested L80 type 1 values to be respectively 93%, 84%, 67% and 50%of the values of API spec 5CT Table 3.1.

     This is available at no extra cost from all reputable mills   


     10. Heat Treatment:  The option which will be elected by the mill should be asked for in the pre-qualification phase and should be spelled out in the quotation, by the manufacturer and in the purchase order, by the purchaser.

     For instances, N80 can be either Full Length Normalized (N), Normalized & Tempered (N+T) or quenched & tempered (Q+T). For the latter chemistry must be restricted - both C and Mn levels to be reduced - to allow crack free quenching.


     11. Line pipe used as Casing:        The steel making and process of manufacturing should follow API Spec 5L but acceptance criteria - geometry mainly - should be in line with API Spec 5 CT. This is seldom the case. See case histories: 13 3/8'', 16'',18 5/8'', 20'' and 30'' where pipe ovality and/or pipe maximum OD, created difficulties with not only threading but mainly ancillary equipment - hoisting, centralisers/stop collars and wellhead slips.


     12. Thread Protectors:       Preference for 'drift-able thread protectors' should be spelled out. Premium Connections require premium protectors. Not all qualified Research acceptance criteria as published in 1988 SPE 17209. Furthermore, pipe preservation techniques require grit blasting, following accepted Swedish standards - SA 2.5 as defined in S.I.S. 05 5900:1967.  (See equivalent BS 4232/1967). This operation may place grit in the thread and/or seal area which can create leaks and galling, if sub-optimum protectors are used.

          In this vein, it is useful to remember that split-able handling protectors were not designed for premium connections and can damage the seal area.

     Recommended thread compounds are updated by proceedings of JIP DEA(E) - 1992 on the subject of environmentally acceptable products.


     14. Pipe roundness:  To achieve quality thread cutting, pipe must BE ROUND AND STRAIGHT. ITEM NR 2248 OF API TG/92.

     END USERS ARE encouraged to check roundness using either Go/No-go gauges or Eddy current. Thread enhancement can be achieved 'true´ing up' the pipe near both ends and/or cutting the threads using an ID chucked lathe - done sometimes, on request.

     The latter creates a string which is a true 'gun barrel' and enhances metal seals.


Eddy current is recommended to measure pipe ovality prior to and after threading. Long pipe and heavy wall create mass unbalance which creates thread chatter, clover leaf and/or egg shaped threads.


     15. Thread Make-up:  Presently, proper make up of premium connections is difficult to assess as it relies on indirect measurement: torque, function of friction. This is the case, even using scribe-lines on mill-end, dope applicators and updated torque turn tongs - including 'soft touch' and 'low stress' dies  - . Ultrasonic techniques are available, to assess the correct pre-load of the seal interface.

Drilling Consultant
Total Posts: 24
Join Date: 08/01/16
Hello Bradley,
Thanks for your feedback.
I fully understand your concerns regarding sourcing the required pipes (Csg and Tbg) for my client. 
When I used to work as a DE, I always did the casing design and got it checked and vetted by external Casing Design experts. Then we put together the technical requirements for our projects and started the bidding process. We did the pre-qualification process and knocked off few suppliers and did the technical evaluation with the remainders. During the Technical evaluation we audited the suppliers using third party QA/QC consultants from TH-Hill and checked their Quality Control process and finalized the Technical evaluation. 
I'm recommending the same procedure to my clients, however would like to narrow down the list to speed up the process. 
Thanks again for your time.

Deepwater Drilling Engineering / Su
Maurel & Prom
Total Posts: 5
Join Date: 10/04/09
Greetings Gaz from Dallas. 

I may be under-reading your OCTG post . . . and your desire for a list of manufacturers, since this is one of your key long lead EPC items, so bear with me.

I and others can list a number of manufacturers for you, BUT I cannot advise you strongly enough to FIRST focus on getting a valid Drilling/Completions Engineering Casing Design Analysis that will serve your basis well.  
As you know, this Life Cycle Design is absolutely core to your whole project for your specific country region, location, application. 

My professional methodology preference is to use LRFD. 

This Engineering / LRFD Analysis will then drive your mechanical / operational risk factors  . .  which in turn will drive your Procurement-Manufacturing source requirements and eventual successful operational construction.
Additionally, your implied concern of the manufacturing, is paramount (especially with your mention of sour service etc). so yes, am sure you will include a 'Fit-for-Purpose' QAQC 3rd Party Service (that can perform for you internationally) in the contracting scheme.

(former XOM)
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