1.
Casing During or after the drilling of oil and gas well, one or several steel pipes are lowered according to the design requirements to prevent the collapse of the well wall, separate the fluid of each layer, and form the oil and gas production channel. These steel pipes are called casings.
Note: φ101.6mm
CASING is a 4 "uncoupled casing
Step 2:
TUBING Tubing is a special tubing for oil Wells. Tubing is divided into two ends of the thickened tubing and flat tubing according to the thickening situation. Deep well completion uses thickened tubing at both ends, which is generally 6-10m in length.
3. Sucker rod
1) Sucker rod technical specifications
The main body of the sucker rod is a solid rod with a round section, and the two ends are provided with a thickened forging head, and the forging head is provided with a wrench connecting the thread and a square section. The rod nominal diameters are 16mm(5/8 in), 19mm(3/4 in), 22mm(7/8 in), and 25mm(1 in). In addition to the most common 8m rod length, there are also five rod lengths of 1.0m, 1.5m, 2.5m, 3.0m and 4.4m, specially processed in combination.
2) Rod material
There are two kinds of domestic sucker rod, one is carbon steel sucker rod, the other is alloy steel sucker rod. Carbon steel sucker rod is generally made of 40 # high quality carbon steel, alloy steel sucker rod is generally made of 20 # chromium molybdenum steel or 15 # nickel molybdenum steel.
3) Rod grade
Grade C, D and K
(1) Grade C tensile strength is low (620-794MPa), suitable for medium and light load, shallow and deep Wells with slight seawater corrosion;
(2) Grade D has high tensile strength (794-965MPa), which is suitable for medium-heavy duty and medium-deep Wells with slight salt water corrosion;
(3) Grade K has the lowest tensile strength (588-794MPa), suitable for light and medium loads with hydrogen sulfide and carbon dioxide corrosive media
4.
DRILL PIPE Drill pipe is the basic unit of drill string, which mainly transmits the torque and load of rotary table, and establishes the circulation channel of workflow body. It is the basic supporting special pipe to complete workover operation. The joints of the drill pipe itself are commonly called drill pipe joints, which are used in pairs, that is, both ends of the drill pipe are equipped with male and female joints, whose function is to connect and protect the drill pipe for filling. Figure 2-2 shows the feature parameters.
The oil drill pipe joint is composed of a fixture joint part, a welded joint part, a joint thread and a sealing shoulder. Divided into internal thread joint and external thread joint, used in pairs.
Drill pipe is the basic component of the drill string and is made of seamless steel pipe (wall thickness is usually 9~11mm). Its main role is to transfer torque and drilling fluid, by gradually lengthening the drill pipe to deepen the hole. Therefore, drill pipe plays a very important role in oil drilling.
Drill pipe structure and specifications
The drill pipe consists of seamless steel pipe with a wall thickness of 9-11mm, consisting of a drill pipe body and a drill pipe joint. There are two ways to connect the drill pipe body joint: one is fine thread connection, that is, there is a fine male thread at both ends of the pipe body, and the female thread at one end of the joint is connected. This drill pipe is called fine thread drill pipe; The other is to butt the pipe body and the joint together by friction welding, called butt welding drill pipe. Fine thread drill pipe has been basically eliminated, domestic production or imported drill pipe are butt welded drill pipe (no fine thread drill pipe).
ESASTSUN OILFIELD EQUIPMENT MANUFACTURING (CAMBODIA) CO., LTD