CN203035104U - Oil hollow drill rod - Google Patents

Abstract

The utility model discloses an oil hollow drill rod which comprises a cylindrical main rod body (3). A drill shaft body (4) is arranged in the middle of the main rod body (3). A plurality of axially-distributed arc-shaped grooves (6) are distributed on the circumferential face of the drill shaft body (4). A drill edge column (5) is formed between any two arc-shaped grooves (6). A through hole (1) penetrating through the main rod body (3) and the drill shaft body (4) is formed inside the main rod body (3). The oil hollow drill rod can well and timely discharge inside slurry generated in the process of well drilling, can not stuck, ensures normal operation, and is high in reliability and long in service life.

Description

Oil Hollow Drill Pipe

technical field

The utility model relates to an oil drilling tool, in particular to an oil hollow drill pipe used for oil drilling, and belongs to the field of oil machinery.

Background technique

When the hollow drill pipe is drilling at a deep level, a lot of drilling excrement such as soil chips, stone chips and mud will be produced in the well. If these excrement cannot be discharged in a timely and good manner and cause blockage in the well, it will not only damage the drill bit, drill pipe, etc. Cause damage, but also there will be problems such as drill bit stuck, drill rod can not move, not only damage to the drilling rig but also affect the working efficiency of the drilling rig, which is unfavorable for practicality and development.

Utility model content

The utility model provides a petroleum hollow drill pipe, which solves the problem of drill pipe damage and jamming caused by drilling blockage of the conventional petroleum hollow drill pipe during drilling.

The technical solution provided by the utility model is: the oil hollow drill pipe includes a cylindrical main rod body, the middle section of the main rod body is provided with a drill shaft body, and the circumferential surface of the drill shaft body is provided with several axially distributed arc grooves , A drill column is formed between any two arc-shaped grooves, and a through hole passing through the main rod body and the drill shaft body is also provided in the main rod body. The drill column can carry out secondary drilling on the well wall, improve the smoothness and flatness of the well wall, and strengthen the well wall.

Further, a positioning shaft is provided on any two end surfaces of the main rod body, and the through hole runs through the positioning shaft. When the oil drill pipe is connected, the positioning axis will position the oil drill pipe and the connecting piece, prevent the oil drill pipe from tilting, and ensure the guiding performance of the oil drill pipe and the connecting piece.

Further, the length of the positioning shaft is 5-8 cm. The positioning shaft mainly plays a good positioning and guiding function when connecting; considering the positioning and guiding strength of the positioning shaft and the problem of materials, the length of the positioning shaft is set at 5-8 cm, and the strength is strengthened while using the least amount of material. Its positioning and guiding strength.

Further, there are 8 arc-shaped grooves in total, which are evenly distributed around each other. If there are 8 arc-shaped grooves, there are 8 drill columns, and the 8 drill columns can achieve high working efficiency.

Further, the main rod body and the drill shaft body are made of WC cemented carbide. WC cemented carbide is an alloy material made of hard compounds of refractory metals and bonding metals through powder metallurgy. WC cemented carbide has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance and corrosion resistance, especially its high hardness and wear resistance, which basically remain unchanged even at a temperature of 500°C. Change, it still has a high hardness at 1000 °C. Therefore, the use of WC cemented carbide material for the main rod body and the drill shaft body can not only meet the working requirements of the downhole, but also has strong wear resistance, which greatly prolongs the service life of the oil drill pipe.

Further, the surface of the main rod body and the drill shaft body is coated with a layer of anti-rust paint. Because the environment in the well is harsh and the soil is highly corrosive, it is easy to cause damage to the main rod body and the drill shaft body. A chemical reaction occurs in the outside world, thereby improving the service life of the main rod body and the drill shaft body, and enhancing the reliability and safety of the oil drill pipe.

The utility model has the advantages of: the oil hollow drill pipe designed by the utility model can discharge the internal mud produced by drilling well and in time, and there will be no stuck problem of the oil drill pipe, ensuring the normal operation of the oil drill pipe , and high reliability, long service life. the

Description of drawings

Fig. 1 is the structural representation of the utility model.

The symbols in the figure are respectively represented as: 1. through hole; 2. positioning shaft; 3. main rod body; 4. drill shaft body; 5. drill edge column; 6. arc-shaped groove.

Detailed ways

The utility model will be further described in detail below in conjunction with the embodiments and accompanying drawings, but the implementation of the utility model is not limited thereto.

Example

Referring to Fig. 1, the petroleum hollow drill pipe includes a cylindrical main rod body 3, the middle section of the main rod body 3 is provided with a drill shaft body 4, and the circumferential surface of the drill shaft body 4 is provided with several axially distributed arc-shaped grooves 6 A drill column 5 is formed between any two arc-shaped grooves 6 , and a through hole 1 passing through the main rod body 3 and the drill shaft body 4 is also provided in the main rod body 3 .

Any two ends of the main rod body 3 are provided with a positioning shaft 2 , and the through hole 1 runs through the positioning shaft 2 .

The length of the positioning shaft 2 is 5-8 cm.

There are eight arc-shaped grooves 6 in total, which are evenly distributed around each other.

The main rod body 3 and the drill shaft body 4 are made of WC hard alloy.

The surfaces of the main rod body 3 and the drill shaft body 4 are coated with a layer of antirust paint.

When the utility model is connected, it can not only position well and ensure the guiding performance, but also the mud generated during the drilling process can be well discharged through the arc-shaped groove 6, so as to avoid the stuck and immovable drill pipe caused by blockage in the well The problem of oil drill pipe is guaranteed, and the accident rate is also reduced. The reliability is high and it is beneficial to use.

As mentioned above, the utility model can be well realized.

Claims (6)

1. Petroleum hollow drill pipe, including a cylindrical main rod body (3), characterized in that: the middle section of the main rod body (3) is provided with a drill shaft body (4), and the peripheral surface of the drill shaft body (4) is provided with several Axially distributed arc-shaped grooves (6), a drill column (5) is formed between any two arc-shaped grooves (6), and the main rod body (3) is also provided with a penetrating main rod body ( 3) and the through hole (1) of the drill shaft body (4). 2. The petroleum hollow drill pipe according to claim 1, characterized in that: any end surface of the main rod body (3) is provided with a positioning shaft (2), and the through hole (1) runs through the positioning shaft (2). 3. The petroleum hollow drill pipe according to claim 2, characterized in that: the length of the positioning shaft (2) is 5-8 cm. 4. The petroleum hollow drill pipe according to claim 1, characterized in that: there are 8 arc-shaped grooves (6) in total, which are evenly distributed around each other. 5. The petroleum hollow drill pipe according to claim 1, characterized in that: the main rod body (3) and the drill shaft body (4) are made of WC cemented carbide. 6. The petroleum hollow drill pipe according to claim 1, characterized in that: the surface of the main rod body (3) and the drill shaft body (4) is coated with a layer of anti-rust paint.

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