Main / Catalogue / Casings and core barrels

Casings and Core Barrels

CJSC Mining Technologies manufacture and supply casings (with or without couplings) and barrel cores, and nipples, for use in exploratory drilling. The company owns and operates its own production facility and complies with all recognized relevant standards and regulations. All products are certified to guarantee quality, including ISO, the international quality management system body. Delivery can be made to any worldwide location and the choice of freight forwarder is at the customer’s discretion.

Designation
Casings and core barrels for exploratory drilling and nipples to them COST 6238-77
1 Casing and core barrel with a nipple connection 89x4.5, 1500-6000 mm long COST 6238-77
2 Casing and core barrel with a nipple connection 89x5, 1500-6000 mm long COST 6238-77
3 Nipple to the casing and core barrel with a nipple connection 89)(170 GOST 6238-77
4 Casing and core barrel with a nipple connection 108x4,5, 1500-6000 mm long COST 6238-77
5 Casing and core barrel with a nipple connection 108x5, 1500-6000 mm long GOST 6238-77
6 Nipple to the casing and core barrel with a nipple connection 108x170 COST 6238-77
7 Casing and core barrel with a nipple connection 127x5, 1500-6000 mm long COST 6238-77
8 Nipple to the casing and core barrel with a nipple connection 127x170 COST 6238-77
9 Casing and core barrel with a nipple connection 146x5, 1500-6000 mm long COST 6238-77
10 Nipple to the casing and core barrel with a nipple connection 146x170 GOST 6238-77

 

Casings and coupling to them – GOST 632-80
1 Casing with OTTM thread 114x6.4 COST 632-80
Casing with OTTM thread 114x7.4 COST 632-80
Casing with OTTM thread 114x8.6 COST 632-80
Casing with OTTM thread 114x10.2 COST 632-80
2 Casing with OTTM thread 127x6.4 COST 632-80
Casing with OTTM thread 127x7.5 COST 632-80
Casing with OTTM thread 127x9.2 COST 632-80
Casing with OTTM thread 127x10.7 COST 632-80
3 Casing with OTTM thread 146x6.5 COST 632-80
Casing with OTTM thread 146x7.0 COST 632-80
Casing with OTTM thread 146x7.7 COST 632-80
Casing with OTTM thread 146x8.5 COST 632-80
Casing with OTTM thread 146x9.5 COST 632-80
Casing with OTTM thread 146x10.7 COST 632-80
4 Casing with OTTM thread 168x7.3 GOST 632-80
Casing with OTTM thread 168x8.0 GOST 632-80
Casing with OTTM thread 168x8.9 GOST 632-80
Casing with OTTM thread 168x10.6 GOST 632-80
Casing with OTTM thread 168x12.1 GOST 632-80
5 Casing with ОТТМ thread 178х6.9 GOST 632-80
Casing with ОТТМ thread 178х8.1 GOST 632-80
Casing with ОТТМ thread 178х9.2 GOST 632-80
Casing with ОТТМ thread 178х11.5 GOST 632-80
Casing with ОТТМ thread 178х12.7 GOST 632-80
Casing with ОТТМ thread 178х13.7 GOST 632-80
Casing with ОТТМ thread 178х15.0 GOST 632-80
6 Casing with ОТТМ thread 194х7.6 GOST 632-80
Casing with ОТТМ thread 194х8.3 GOST 632-80
Casing with ОТТМ thread 194х9.5 GOST 632-80
Casing with ОТТМ thread 194х10.9 GOST 632-80
Casing with ОТТМ thread 194х12.7 GOST 632-80
Casing with ОТТМ thread 194х15.1 GOST 632-80
7 Casing with ОТТМ thread 219х7.7 GOST 632-80
Casing with ОТТМ thread 219х8.9 GOST 632-80
Casing with ОТТМ thread 219х10.2 GOST 632-80
Casing with ОТТМ thread 219х11.4 GOST 632-80
Casing with ОТТМ thread 219х12.7 GOST 632-80
Casing with ОТТМ thread 219х14.2 GOST 632-80

Characteristics of Steel Groups used in manufactures

Name of parameter Mechanical properties according to steel groups
K E  
Tensile strength Gt,
MPa (min)
687 735 784
Yield stress ay,
MPa (min)
490 539 637
Tensile strain 85,
% (min)
12 12 12

Technical features

Casings and barrel cores, and their nipples, adhere to GOST 6238-77 standard. Items with nipples are manufactured with an outer thread at both ends, or can be supplied as core-to-core joins with no nipple. Core and nipple threads can be right or left-hand as required. Barrel cores come with right-hand thread only.

The surfaces of threads are smooth and free from defects to ensure excellent strength and continuity. There may be some cosmetic traces left by the thread cutting tool. End-to-end centerlines from the threads at nipple ends are in alignment with a permitted maximum deviation of no more than 0.6mm.

Manufacturing process

Barrel cores have diameters of 25mm to 108mm. Nipple joint casings are manufactured with diameters of 73mm to 146mm.

Casing and barrel core lengths can be from 0.5m to 6m.

Surfaces in all cases will be free from cracks or other defects. Cosmetic, insignificant marks will not cause negative deviation of wall thickness. Steel of strength grades D, K, M are used to manufacture cores and nipples, with sulfur and phosphorous mass fractions at a maximum of 0.045% of either one.

Casings and couplings conform to GOST 632-80 standard of manufacture and casings can be produces in lengths from 9.5m to 13m. Couplings are screwed and fitted to one end of the casing. At the other end, the thread is shielded by a drill pipe protector.

Application

Typical uses for casings and barrel cores are:

  • Performing geotechnical surveys
  • Water and mineral exploration
  • Exploratory drilling activities
  • The construction industry

Barrel cores enable core insertion and recovery and maintain a true direction while the well shaft is being drilled. They also help to protect the integrity of the shaft walls, especially when the terrain is unstable.

Delivery and payment

Payments are made directly to the company’s bank account. Then the production and delivery agreement is finalized and signed off. Details include:

  • Planned production schedule

  • Delivery method and details

Once we have issue the invoice and received payment, production begins as per the agreed schedule and plan. Then it is handed over to the freight forwarder for eventual delivery.

A typical production cycle is about 30 days. The precise duration is dependent on the order’s size and complexity.

Orders are delivered in containers. The delivery schedule is agreed with the transport company.

Drilling pipes and drilling rods from the manufacturer

Drilling pipes and drilling rods from the manufacturer
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