| Model: | drill collar |
|---|---|
| Brand: | LAKEPETRO |
| Origin: | Made In China |
| Category: | Metallurgy , Mining & Energy / Energy / Petroleum |
| Label: | drill collar , drilling collar , API |
| Price: |
US $500
/ pc
|
| Min. Order: | 30 pc |
| Live Chat: | Last Online:15 Jan, 2016 |
Drill collars are extra-heavy integral tools used to concentrate weight onto the drill bit so as to produce sufficient force for the drill bit to break rock efficiently while drilling. They are made of AISI 4145H modified steel and are connected between drill pipes and drill bits.
Drill collars come in 30 or 31 foot lengths and are furnished as slick (as-rolled surface finish) or spiraled. Spiraled drill collars have grooves on its external surface which maintains an even flow of drilling fluid around the collar to equalize pressure and reduce differential-sticking of the collar to the wall of the oilwell.
Our drill collar connections comply with dimensional requirements specified in API Spec. 7/7-1. Drill collars also come with slip and elevator recesses for safe and efficient handling. Slip and elevator recesses can be used together or separately.
|
Drill Collar Connection |
Drill Collar Diameter(in) |
Bore Diameter(in) |
Length(ft) |
Linear Weight (Approx.) (lb/ft) |
Displacement (Open End) (US gal/ft) |
Bending Strength Ratio |
|
NC 23-31 |
3-1/8 |
1-1/4 |
30 |
22.00 |
0.337 |
2.57:1 |
|
NC 26-35 (2-3/8 IF) |
3-1/2 |
1-1/2 |
30 |
26.70 |
0.408 |
2.42:1 |
|
NC 31-41 (2-7/8 IF) |
4-1/8 |
2 |
30 or 31 |
33.65 |
0.515 |
2.43:1 |
|
NC35-47 |
4-3/4 |
2 |
30 or 31 |
46.81 |
0.716 |
2.58:1 |
|
NC 38-50 (3-1/2 IF) |
5 |
2-1/4 |
30 or 31 |
53.29 |
0.815 |
2.38:1 |
|
NC 44-60 |
6 |
2-1/4 |
30 or 31 |
82.61 |
1.264 |
2.49:1 |
|
NC 44-60 |
6 |
2-13/16 |
30 or 31 |
75.90 |
1.161 |
2.84:1 |
|
NC 44-62 |
6-1/4 |
2-1/4 |
30 or 31 |
90.52 |
1.385 |
2.91:1 |
|
NC 46 -62 (4IF) |
6-1/4 |
2-13/16 |
30 or 31 |
83.81 |
1.282 |
2.63:1 |
|
NC 46 -65 (4IF) |
6-1/2 |
2-1/4 |
30 or 31 |
99.52 |
1.522 |
2.76:1 |
|
NC 46-65 (4IF) |
6-1/2 |
2-13/16 |
30 or 31 |
92.81 |
1.420 |
3.05:1 |
|
NC 46-67 (4IF) |
6-3/4 |
2-1/4 |
30 or 31 |
108.52 |
1.600 |
3.18:1 |
|
NC 50-70 (4IF) |
7 |
2-1/4 |
30 or 31 |
117.52 |
1.798 |
2.54:1 |
|
NC 50 -70 (4IF) |
7 |
2-13/16 |
30 or 31 |
110.77 |
1.694 |
2.73:1 |
|
NC 50-72 (4IF) |
7-1/4 |
2-13/16 |
30 or 31 |
119.81 |
1.833 |
3.12:1 |
|
NC 56-77 |
7-3/4 |
2-13/16 |
30 or 31 |
139.90 |
2.140 |
2.70:1 |
|
NC 56-80 |
8 |
2-13/16 |
30 or 31 |
150.81 |
2.307 |
3.02:1 |
|
6-5/8 REG |
8-1/4 |
2-13/16 |
30 or 31 |
161.81 |
2.472 |
2.93:1 |
|
NC 61-90 |
9 |
2-13/16 |
30 or 31 |
195.81 |
2.995 |
3.17:1 |
|
7-5/8 REG |
9-1/2 |
3 |
30 or 31 |
217.00 |
3.319 |
2.81:1 |
|
NC 70 -97 |
9-3/4 |
3 |
30 or 31 |
230.00 |
3.518 |
2.57:1 |
|
NC 70-100 |
10 |
3 |
30 or 31 |
242.97 |
3.717 |
2.81:1 |
|
8-5/8 REG |
11 |
3 |
30 or 31 |
299.00 |
4.574 |
2.84:1 |
|
Standard Features |
API Boreback Box Connection API stress relieve groove pin connection Cold Rolling Thread roots Phosphate coated connections |
|
Options |
Spiral grooved or Non-Spiral (Slick Type) Type of Hardband and Hardband configuration Elevator and Slip recesses or Slip Recess only Other type of connections to meet specific needs |
|
Protection |
Standard Pressed Steel Thread Protectors. Cast Steel Lifting Bail Thread Protectors upon request. |
|
Mill Test Certificates |
Issued in accordance with API 7/7-1 and API RP7G specifications.
Third Party Inspection can be performed on request at buyer’s care and expense. |
When ordering or requesting quotations for drill collars, please specify the following :
Company Location
Lake Petro company is a professional supplier of various oilfield equipment, including oil drilling and service equipment,oil production equipment,OCTG ,wellhead & downhole tools and spare parts with API certification. our products have already been exported to USA, South America, Africa, Middle East, Russia and some other countries (regions). Lake Petro company has become VIP (assigned) supplier and built strategic partnership with some coutries' national petroleum companies.
Where are we?
15F,Huatai International Financial Center
Huanghe Road,Dongying City,Shandong Province,People's republic of China
FAQ
How to order?
Please send us your inquiry with detail item description or with Model number.
If there is no packing demand we take it as our regular exported standard packing.
We will offer you an order form for filling. We will recommend you the most suitable model according to information you offered.
You send ud your detail requirement, we provide quotation to you.
Can I expect a quality products?
All the production and processing are strictly according to ISO 9001:2008 and API standard. At the same time, mature production technology ensuring the quality satisfy international request. We also welcome the third party inspection, such as BV, SGS and TUV.
The information you may like to know before Payment:
1. Methods of Payment:
T/T (Telegraphic Transfer) or L/C at sight
2. Shipping way
Sample order: we s est Courier express like DHL/UPS/TNT/FEDEX or by air
Bulk order: we s est by air or by sea.
3. Quality Control
We have our own experienced QC.
There will be strict inspection and testing for every order before shipping out.
