CN204984280U - Novel sealed drilling rod - Google Patents

Abstract

A new type of sealed drill pipe, including coaxially arranged male joints, connecting rods and female joints. The male joints and female joints are respectively fixed at the left and right ends of the connecting rods. The male joints include circular shafts arranged coaxially from left to right. , the first frustum and the second frustum, the diameter of the left end of the first frustum is smaller than the diameter of the right end and the side of the first frustum is provided with external threads, the diameter of the shaft is less than or equal to the diameter of the left end of the first frustum, and the left end of the second frustum The diameter is less than or equal to the diameter of the right end, and the diameter of the left end of the second frustum is greater than or equal to the outer diameter of the external thread at the right end of the first frustum, and the diameter of the right end of the second frustum is smaller than the diameter of the connecting rod; the female joint is from right to left along its axis The second frustum hole matching with the second frustum body, the first frustum hole fitting with the first frustum body and the shaft hole fitting with the circular shaft are coaxially provided in sequence, and the first frustum hole wall is provided with the first frustum hole. The internal thread that fits the external thread on the truncated body.

Description

A new type of sealed drill pipe

technical field

The utility model relates to a mining drilling device, in particular to a novel sealed drilling rod.

Background technique

In the process of coal mining, it is necessary to drill gas drainage holes for safe mining. Since the gas drainage holes are deep, multiple drill pipes need to be connected to reach the specified depth. The water flow or air flow inside the drill pipes often leaks at the joints. Not only It causes the loss of water flow or air flow, and reduces the water pressure or air pressure, which affects the normal use of the drill pipe. At present, although there are sealed drill pipes, a sealing ring is added to the outer peripheral surface of the front end of the male joint for sealing. Due to the harsh working conditions in the well, the sealing ring is easy to wear and tear, and the ideal sealing effect cannot be achieved.

During the drilling process of the drilling rig, especially when encountering hard rock, the drill pipe vibrates severely, the internal thread of the female joint is easily damaged, resulting in hole reaming, and the joint of the drill pipe is loose and unreliable, resulting in the scrapping of the drill pipe.

Utility model content

Aiming at the defects existing in the prior art, the utility model provides a new type of sealed drill pipe, which is easy to operate, stable in operation and easy to maintain, and the double-annular support structure can effectively prevent the female joint from flaring. The sealing ring is not easy to be damaged, the sealing effect is good, and the service life is long.

The specific technical solution is: a new type of sealed drill pipe, including a male joint, a connecting rod and a female joint arranged coaxially. The male joint and the female joint are respectively fixed at the left and right ends of the connecting rod. The circular shaft, the first circular frustum body and the second circular frustum body set by the axis, the diameter of the left end of the first circular frustum body is smaller than the diameter of the right end and the side of the first circular frustum body is provided with external threads, the diameter of the circular shaft is less than or equal to the diameter of the left end of the first circular frustum body, The diameter of the left end of the second truncated body is less than or equal to the diameter of the right end, and the diameter of the left end of the second truncated body is greater than or equal to the outer diameter of the external thread at the right end of the first truncated body, and the diameter of the right end of the second truncated body is smaller than the diameter of the connecting rod; the female joint along its axis From right to left, there are coaxially provided with the second frustum hole cooperating with the second frustum body, the first frustum hole fitting with the first frustum body, and the shaft hole fitting with the circular shaft, and the hole wall of the first frustum hole is An internal thread matched with the external thread on the first circular truncated body is provided, an annular groove is arranged on the wall of the shaft hole, and a sealing ring is arranged in the annular groove.

The male joint and the connecting rod are provided with a water hole along the axial direction, and the shaft hole of the female joint communicates with the water hole of the connecting rod.

The outer diameter of the female joint is the same as that of the connecting rod.

The utility model has the advantages of simple structure and low manufacturing cost. The drill pipes described are used in combination and can be combined into drill pipes of different lengths according to actual needs. The round shaft fits with the shaft hole of the female joint, and a sealing ring is arranged in the shaft hole to realize the radial sealing between the round shaft and the shaft hole. The first round table body and the first round table hole form a taper thread connection through the cooperation of the external thread and the internal thread. , through the cooperation between the circular shaft and the shaft hole and the cooperation between the second frustum body and the second frustum hole, a double-annular support is formed. During the drilling process, the double-annular support structure can make the tapered thread bear less bending stress, which can effectively prevent the female Occurrence of joint flaring. The sealing ring arranged in the shaft hole is not easy to be damaged, has good sealing effect and long service life.

Description of drawings

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

Fig. 2 is a schematic diagram of the mating connection between the male connector and the female connector of the present invention.

detailed description

As shown in Figures 1 and 2, a new type of sealed drill pipe includes a male joint 1, a connecting rod 2 and a female joint 3 arranged coaxially, and the male joint 1 and the female joint 3 are respectively fixed at the left and right ends of the connecting rod 2 The male joint 1 includes a circular shaft 4, a first frustum 5 and a second frustum 6 arranged coaxially from left to right. Thread 7, the diameter of the circular shaft 4 is less than or equal to the diameter of the left end of the first frustum 5, the side of the circular shaft 4 has a good finish, the diameter of the left end of the second frustum 6 is less than or equal to the diameter of the right end, and the diameter of the left end of the second frustum 6 is Greater than or equal to the outer diameter of the external thread 7 at the right end of the first truncated truncated body 5, the diameter of the right end of the second truncated truncated body 6 is smaller than the diameter of the connecting rod 2; The second frustum hole 8 matched with the body 6, the first frustum hole 9 matched with the first frustum body 5 and the shaft hole 10 matched with the circular shaft 4, the taper of the first frustum body 5 is slightly larger than the taper of the first frustum hole 9 , and the wall of the first circular platform hole 9 is provided with an internal thread 11 that cooperates with the external thread 7 on the first circular platform body 5, and an annular groove is provided on the wall of the shaft hole 10, and a sealing ring 12 is arranged in the annular groove.

The male joint 1 and the connecting rod 2 are provided with a water hole 13 along the axial direction, and the shaft hole 10 of the female joint 3 communicates with the water hole 13 of the connecting rod 2 to allow water to flow through the device.

The outer diameter of the female joint 3 is the same as that of the connecting rod 2, which facilitates the passage of the device when drilling.

Spiral chip removal grooves are arranged on the outer peripheral surfaces of the connecting rod 2 and the female joint 3, which can remove waste chips generated during drilling operations.

The utility model has the advantages of simple structure and low manufacturing cost. The drill pipes described are used in combination and can be combined into drill pipes of different lengths according to actual needs. The round shaft 4 on 1 is matched with the shaft hole 10 of the female joint 3, and a sealing ring 12 is arranged in the shaft hole 10 to realize the radial sealing between the round shaft 4 and the shaft hole 10. The first circular platform body 5 and the first circular platform hole 9 The taper thread connection is formed through the cooperation of the external thread 7 and the internal thread 11, and the double-ring support is formed through the cooperation between the circular shaft 4 and the shaft hole 10 and the second conical body 6 and the second conical hole 8. During the drilling process, the double ring The surface support structure can make the tapered thread bear less bending stress, and can effectively prevent the female joint 3 from flaring. The sealing ring 12 provided in the shaft hole 10 is not easily damaged, has good sealing effect and long service life.

Claims (3)

1. a novel seal drilling rod, it is characterized in that: comprise the coaxial male joint arranged, connecting rod and female joint, male joint and female joint are fixedly installed on two ends, connecting rod left and right respectively, male joint comprises from left to right the coaxial circular shaft arranged successively, first Rotary-table and the second Rotary-table, first Rotary-table left end diameter is less than right-hand member diameter and the first Rotary-table side is provided with external screw thread, the diameter of circular shaft is less than or equal to the first Rotary-table left end diameter, second Rotary-table left end diameter is less than or equal to right-hand member diameter, and the second Rotary-table left end diameter is more than or equal to the externally threaded external diameter of the first Rotary-table right-hand member, second Rotary-table right-hand member diameter is less than the diameter of connecting rod, female joint is axially coaxially arranged with the second round platform hole coordinated with the second Rotary-table, the first round platform hole coordinated with the first Rotary-table and the axis hole coordinated with circular shaft from right to left successively along it, and the first round platform hole hole wall is provided with the internal thread with the upper outside threaded engagement of the first Rotary-table, axis hole hole wall is provided with annular groove, in annular groove, is provided with sealing ring.

2. a kind of novel seal drilling rod as claimed in claim 1, is characterized in that: described male joint and connecting rod are axially provided with water hole along it, and the axis hole of female joint is communicated with the water hole of connecting rod.

3. a kind of novel seal drilling rod as claimed in claim 1 or 2, is characterized in that: the external diameter of described female joint is identical with the external diameter of connecting rod.