Stabilizers, calibrators and centralizers are united by one common name — a supporting and centralizing or calibrating and centering tool.
Calibrator is located directly above the bore bit, the stabilizer is installed above the calibrator or between the drill collars, the centralizer is mounted on the body of the bottom-hole motor or in the column of the drill collars.
The introduction of a supporting and centralizing tool into the drill string is mandatory, especially in case of drilling deep and ultradeep wells. It helps to avoid excessive well deviation, prevent harmful keyseating on the walls of the well, eliminate irregularities on these walls, avoid well narrowing and prolong the life time of the bore bit, reducing the time required to drill the borehole.
Stabilizers, calibrators and centralizers are made of high-quality alloyed steel, which is thermally treated, giving optimum mechanical properties of steel. Also, stabilizers, calibrators and centralizers can be manufactured from a non-magnetic steel mark. All screw joints are made strictly in accordance with GOST and API. Sizes and shapes of products are operated in accordance with the requirements of GOST and API Spec.
We offer a wide range of products, made in accordance with the requirements of GOST and API Spec. All products are made according to previously agreed customer’s drawings, taking into account shapes and sizes, and also values and hard bundling shapes.
Stabilizers are intended to stabilize (improve) the operation of the guide section of the drill string by limiting the pipeline deflection, especially in the presence of caverns, dampening transverse (partially longitudinal and torsional) vibrations of the drilling tool at its contacts with the borehole wall.
Stabilizers are structurally similar to centralizers and calibrators. Stabilizers have different shapes, sizes and design. Depending on a design and used materials type, stabilizers are used in different rocks types.
No. |
Working OD (mm)
|
ID (mm)
|
Total length (mm)
|
Blade working
length (mm) |
Thread type | Design | |
Top | Down | ||||||
1 | 292,1 | 90 | 1800 | 900 | 6 5/8 REG | 6 5/8 REG | 3 straight blades |
2 | 292,1 | 90 | 1800 | 900 | 6 5/8 REG | 6 5/8 REG | 3 spiral blades |
3 | 212,7 | 71 | 1600 | 800 | 5 1/2 FN | 5 1/2 FN | 3 straight blades |
4 | 212,7 | 71 | 1600 | 800 | 5 1/2 FN | 5 1/2 FN | 3 spiral blades |
5 | 141,2 | 44 | 1200 | 400 | 3 1/2 REG | 3 1/2 REG | 3 straight blades |
6 | 141,2 | 44 | 1200 | 400 | 3 1/2 REG | 3 1/2 REG | 3 spiral blades |
Calibrators and centralizers are used as a link element of a drill string bottom when drilling for oil and gas. Calibrators and centralizers are intended to:
Bladed calibrators are intended for calibrating and centralizing a drill string and a bore bit in order to improve operating conditions of a bore bit, a bottom-hole motor and a drill string. Calibrators and centralizers with straight blades help to diminish rod friction when drilling soft formations, that apt to swelling and a thick mud cake capping.
Bladed spiral calibrators are intended for well bore enlargement and calibrating along a bore bit diameter and centralizing and improvement of a bore bit operating conditions in soft, intermediate and hard abrasive and low-abrasive formations. Calibrators are produced with straight and spiral blades, for soft and intermediate formations, and for intermediate and hard formations. Calibrators and centralizers with spiral blades completely overlap the well cross section and form a continuous circular contact with its wall. Such calibrators and centralizers are recommended for use in turbine and rotary drilling of hard and intermediate rocks.
Our calibrators are made of steel type 40ХН2МА with straight or spiral blades with reinforcement of their working surfaces with a hardband coating "Technolase 40S" by laser cladding".
No. |
Working OD (mm)
|
ID (mm)
|
Total length (mm)
|
Blade working
length (mm) |
Thread type | Design | |
Top | Down | ||||||
1 | 393,7 | 89 | 1212 | 280 | NC61 | 6 5/8 REG | 3 spiral blades |
2 | 390,5 | 101 | 1252 | 320 | 6 5/8 FN | 6 5/8 FN | 5 straight blades |
3 | 393,7 | 82 | 756 | 220 | 6 5/8 FN | 6 5/8 FN | 5 spiral blades |
4 | 390,5 | 120 | 750 | 380 | 6 5/8 REG | 7 5/8 REG | 3 straight blades |
5 | 292,1 | 90 | 1175 | 320 | 6 5/8 FN | 6 5/8 REG | 3 spiral blades |
6 | 295,3 | 90 | 1252 | 400 | 6 5/8 REG | 6 5/8 REG | 5 straight blades |
7 | 295,3 | 120 | 546 | 240 | 6 5/8 REG | 6 5/8 REG | 5 straight blades |
8 | 292,1 | 76 | 567 | 170 | 6 5/8 REG | 6 5/8 REG | 3 straight blades |
9 | 215,9 | 90 | 957 | 310 | 5 1/2 FN | 5 1/2 FN | 3 spiral blades |
10 | 214,3 | 71 | 784 | 340 | NC46 | NC46 | 5 straight blades |
11 | 215,9 | 82 | 546 | 280 | 4 1/2 REG | 4 1/2 REG | 3 spiral blades |
12 | 214,3 | 82 | 546 | 280 | 4 1/2 REG | 4 1/2 REG | 5 straight blades |
13 | 142,8 | 44 | 397 | 87 | 3 1/2 REG | 3 1/2 REG | 5 spiral blades |
14 | 141,2 | 44 | 397 | 87 | 3 1/2 REG | 3 1/2 REG | 5 straight blades |
15 | 123,8 | 32 | 259 | 100 | 2 7/8 REG | 2 7/8 REG | 5 spiral blades |