Product Description
Couplings are short lengths of pipe used to connect two joints of tubing or casing, which are painted with color codes on their external surface to indicate their grades.
Tubing Coupling
Tubing Coupling can be widely used in cold and hot water supply, heating supply, fire protection, medicinal gas, industrial petroleum pipeline system etc. It has already replaced welding fittings in most Europe countries, Asia countries, America, Australia and some other countries.
1. Standard: API
2. Size: 2 3/8" --- 20"
3. Steel grade: J55, C75, L80, N80, C95, P110, etc.
4. Thread: NU, EU, STC, LTC and BTC
5. Classification: Upset, non Upset, external upset
Casing coupling
A short length of pipe used to connect two joints of casing. A casing coupling has internal threads (female thread form) machined to match the external threads (male thread form) of the long joints of casing. The two joints of casing are threaded into opposite ends of the casing coupling.
1. Standard: API
2. Size: 4 1/2" --- 20"
3. Steel grade: H-40, J-55, K-55, C-75, L-80, N-80, C-95, AS-95, P-110, L80-13CR
4. Thread: STC, LTC, BTC
Polished rod coupling
Polished rod couplings are designed for connecting of the polished rod to the top rod of the string. Contrary to rod couplings, polished rod couplings have a female cone that eliminates the coupling twist-off in the course of operation.
1. Standard: API Spec 11B
2. Materials: AISI5140 (high quality carbon steel)
3. Coat thickness: 0.010in-0.020in
4. Coat Material: Ni60A Alloy Coating
5. Classification: full size and slim hole
6. Coupling diameter: 5/8"; 3/4"; 7/8"; 1"; 1-1/8"
7. New product: Two-way globoidal protection sucker rod coupling;
Full size sucker rod coupling with big chamfer
Sucker Rod Coupling
Couplings are manufactured from quenched and tempered micro alloyed steels. API couplings are furnished in two classes: Class T and Class SM (Spray Metal). The later has a superficial hardening.
One sucker rod coupling must be processed by a few fabrication procedures, such as, Blanking, drilling hole, boring hole, milling, thread tapping, and so on. At the last step, do the surface treatment. The surface treatment includes black coating, phosphating or per the customers requirement. Besides, it has good anticorrosion and anti-friction property.
Product Parameters
Parameters of Tubing Coupling
| Descriptions and size |
Type of Thread |
O.D*L |
Weight |
| (mm) |
(kg) |
| Tubing coupling |
2-3/8" |
NUE |
73.02*107.95 |
1.28 |
| 2-3/8" |
EUE |
77.80*132.82 |
1.55 |
| 2-7/8" |
NUE |
88.90*130.18 |
2.34 |
| 2-7/8" |
EUE |
93.17*133.35 |
2.4 |
| 3-1/2" |
NUE |
107.95*142.88 |
3.71 |
| 3-1/2" |
EUE |
114.30*146.05 |
4.1 |
| 4" |
NUE |
120.65*146.05 |
4.35 |
| 4" |
EUE |
127.00*152.40 |
4.82 |
| 4-1/2" |
NUE |
132.08*155.58 |
4.89 |
| 4-1/2" |
EUE |
141.30*158.75 |
6.05 |
Parameters of Casing Coupling
| Descriptions and size |
Type of Thread |
O.D*L |
Weight |
| (mm) |
(kg) |
| Casing Coupling |
4-1/2" |
STC |
127.00*158.75 |
5.23 |
| 4-1/2" |
LTC |
127.00*177.80 |
4.15 |
| 4-1/2" |
BTC |
127.00*225.42 |
4.55 |
| 5" |
STC |
141.30*165.10 |
4.66 |
| 5" |
LTC |
141.30*196.85 |
5.75 |
| 5" |
BTC |
141.30*231.78 |
5.85 |
| 5-1/2" |
STC |
153.67*171.45 |
5.23 |
| 5-1/2" |
LTC |
153.67*203.20 |
6.42 |
| 5-1/2" |
BTC |
153.67*234.95 |
6.36 |
| 6-5/8" |
STC |
187.71*184.15 |
9.12 |
| 6-5/8" |
LTC |
187.71*222.25 |
11.34 |
| 6-5/8" |
BTC |
187.71*244.48 |
11.01 |
| 7" |
STC |
194.46*184.15 |
8.39 |
| 7" |
LTC |
194.46*228.60 |
10.83 |
| 7" |
BTC |
194.46*254.00 |
10.54 |
| 7-5/8" |
STC |
215.90*190.50 |
12.3 |
| 7-5/8" |
LTC |
215.90*234.95 |
15.63 |
| 7-5/8" |
BTC |
215.90*263.52 |
15.82 |
| 8-5/8" |
STC |
244.48*196.85 |
16.23 |
| 8-5/8" |
LTC |
244.48*254.00 |
21.67 |
| 8-5/8" |
BTC |
244.48*269.88 |
20.86 |
| 9-5/8" |
STC |
269.88*196.85 |
18.03 |
| 9-5/8" |
LTC |
269.88*266.70 |
25.45 |
| 9-5/8" |
BTC |
269.88*269.88 |
23.16 |
| 10-3/4" |
STC |
298.45*203.20 |
20.78 |
| 10-3/4" |
BTC |
298.45*269.88 |
25.74 |
| 11-3/4' |
STC |
323.85*203.20 |
22.64 |
| 11-3/4' |
BTC |
323.85*269.88 |
28.03 |
| 13-3/8" |
STC |
365.12*203.20 |
25.66 |
| 13-3/8" |
BTC |
365.12*269.88 |
31.77 |
| 16" |
STC |
431.80*228.6 |
34.91 |
| 16" |
BTC |
431.80*269.88 |
40.28 |
| 18-5/8" |
STC |
508.00*228.60 |
51.01 |
| 18-5/8" |
BTC |
508.00*269.88 |
62.68 |
| 20" |
STC |
533.40*228.6 |
43.42 |
| 20" |
LTC |
533.4*292.10 |
57.04 |
| 20" |
BTC |
533.40*269.88 |
50.1 |
Parameters of Polished Rod Coupling
| Size(in) |
Coupling O.D W(mm) |
Length L(mm) |
Thread D.(in) |
Vanish Cone |
Hardness(HRA) |
| |
(+0.13,-0.25) |
(+1.57,-0.00) |
|
|
| 5/8" |
38.1 |
101.6 |
15/16" |
9O |
56-62 |
| 3/4" |
41.28 |
|
1-1/16" |
|
|
| 7/8" |
46 |
|
1-3/16" |
|
|
| 1" |
55.6 |
|
1-3/8" |
|
|
| 1-1/8" |
60.33 |
114.3 |
1-9/16" |
|
|
Parameters of Sucker Rod Coupling
| Type |
grade |
O.D(mm) |
Minimum lengh(mm) |
Hardness |
Weight(kg) |
Standard |
| reference |
| 3/4" |
19-T |
41.05~41.43 |
101.6~103.17 |
56-62HRA |
0.65 |
API 11B |
| 7/8" |
22-T |
45.75~46.13 |
45.75~46.13 |
56-62HRA |
0.8 |
API 11B |
| 1" |
25-T |
55.35~55.73 |
55.35~55.73 |
12-23HRA |
1.15 |
API 11B |
Company Profile
About Us
Maierda, located in Central China, is a professional supplier of petroleum equipment and tools.
Our factory has more than 15 years' experience in the R&D, production, sales and service of oilfield equipment and machinery.
Our sales team has more than 10 years importing & exporting experiences in the oil & gas industry.
Main Products
We are mainly engaged in oil field equipment and tools including tubing couplings, casing couplings, crossovers, polished rod couplings, sucker rod couplings, polished rod clamps, sucker rod centralizers (guides), polished rod, sucker rod, pup joints, etc.
We also provide some other competitive products in the oil & gas field including casing centralizers, stop collar, tubing centralizer, drill pipe centralizer, float equipment (collar and shoe), cementing plugs, cementing heads, stage collars, cement baskets, hammer unions, chiksan swivel joints, etc.
Our Services
We are committed to providing high-quality and cost-effective products and services to our customers.
We guarantee and uphold the highest standards in customer service, client satisfaction, and quality product delivery in the oilfield industry.
Hope to have a good cooperation with you!
Detailed Photos
API Drilling Tools Casing & Tubing Couplings for Petroleum Pipes & Sucker Rods
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