High-pressure sealing blowout prevention drill rod

Abstract

The utility model discloses a high-pressure sealing blowout prevention drill rod which comprises a drill rod body. An inner cavity is formed in the drill rod, vent holes are formed in the male connector and the female connector and communicated with the inner cavity, a blowout prevention pipe, balls and a limiting plate are arranged at the position of the female connector, the blowout prevention pipe penetrates through the vent holes, the diameter of the two ends of the blowout prevention pipe is larger than that of the vent holes, penetrating holes are formed in the surface of the blowout prevention pipe, and the limiting plate is arranged on the inner cavity in the radial direction. The ball is located between the limiting plate and the blowout prevention pipe. In the using process of the drill rod, internal matter flows from the male connector to the female connector, the blowout prevention pipe can slide back and forth in the vent hole, gas pressure in a coal seam can drive the ball to block the blowout prevention pipe, the limiting base of the blowout prevention pipe abuts against the sealing ring on the end face of the vent hole, and uniflow control and bidirectional sealing are achieved. And gas leakage when the drill rod is assembled and retreated is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of drill rods, in particular to a high-pressure sealed blowout-proof drill rod. Background Art

[0002] The drill pipe is connected to the drill rod and is used to connect the surface equipment of the drilling rig and the drilling and grinding equipment or bottom hole device at the bottom of the well. The purpose of the drill pipe is to transport the drilling mud to the drill bit and to raise, lower or rotate the bottom hole device together with the drill bit. The drill pipe must be able to withstand huge internal and external pressure, twisting, bending and vibration. The current drill pipes on the market have poor sealing effect under ultra-high pressure working conditions, and it is difficult to meet the implementation of hydraulic measures, and it is difficult to perform single flow control and two-way sealing on the drill pipe. When the drill pipe is installed and withdrawn, gas is easy to leak from the middle of the drill pipe. Utility Model Content

[0003] In view of this, the technical problem to be solved by the utility model is to provide a high-pressure sealed blowout-proof drill rod, which solves the problem that the drill rod in the prior art is difficult to achieve single-flow control and bidirectional sealing.

[0004] In order to solve the above technical problems, the utility model discloses a high-pressure sealed blowout-proof drill rod, comprising: a drill rod; one end of the drill rod is a male joint, and the other end is a female joint, the outer surface of the male joint is provided with a thread, and the inner surface of the female joint is provided with a thread; the interior of the drill rod has an inner cavity, and both the male joint and the female joint have vents, the vents are connected to the inner cavity, a blowout preventer, a ball and a limit plate are provided at the female joint, the blowout preventer is inserted into the vent, the diameters of the two ends of the blowout preventer are larger than the diameter of the vent, and the surface of the blowout preventer is provided with perforations, the limit plate is radially arranged on the inner cavity, and the ball is located between the limit plate and the blowout preventer.

[0005] Furthermore, a stopper is provided at one end with a limit seat, and at the other end with a limit ring.

[0006] Furthermore, a sealing ring is provided on the inner end surface of the above-mentioned limiting ring.

[0007] Furthermore, the end surface of the above-mentioned limiting seat is an arc surface.

[0008] Furthermore, a sealing ring groove is provided on the end surface of the vent hole, and a sealing ring is provided in the sealing ring groove.

[0009] Compared with the prior art, the present application can obtain the following technical effects:

[0010] During use, the internal material flow direction of the drill rod of the utility model is from the male joint to the female joint, the blowout preventer can slide back and forth in the vent, the gas pressure in the coal seam can drive the ball to seal the blowout preventer, and the limit seat of the blowout preventer abuts against the sealing ring on the end face of the vent, thereby realizing single-flow control and two-way sealing, and preventing gas leakage when the drill rod is installed and withdrawn.

[0011] Of course, any product implementing this application does not necessarily need to achieve all of the technical effects described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0013] Figure 1 It is a cross-sectional schematic diagram of a drill pipe flow limiting seal according to an embodiment of the utility model;

[0014] Figure 2 It is a cross-sectional schematic diagram of a drill rod conduction according to an embodiment of the utility model.

[0015] Figure ID

[0016] Drill pipe 1, male joint 2, female joint 3, inner cavity 4, vent hole 5, blowout preventer 6, ball 7, limit plate 8, perforation 9, limit seat 10, limit ring 11, sealing ring groove 12, sealing ring 13. DETAILED DESCRIPTION

[0017] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0018] Please refer to Figure 1 and Figure 2 , Figure 1 It is a cross-sectional schematic diagram of a drill pipe flow limiting seal according to an embodiment of the utility model; Figure 2 It is a cross-sectional schematic diagram of a drill rod conduction according to an embodiment of the utility model.

[0019] A high-pressure sealed blowout-proof drill pipe, comprising: a drill pipe 1; one end of the drill pipe 1 is a male joint 2, and the other end is a female joint 3, the outer surface of the male joint 2 is provided with a thread, and the inner surface of the female joint 3 is provided with a thread; the interior of the drill pipe 1 has an inner cavity 4, and the male joint 2 and the female joint 3 both have vents 5, the vents 5 are connected to the inner cavity 4, and the female joint 3 is provided with a blowout preventer 6, a ball 7 and a limit plate 8, the blowout preventer 6 is penetrated through the vent 5, the diameters of the two ends of the blowout preventer 6 are larger than the diameter of the vent 5, and the surface of the blowout preventer 6 is provided with a perforation 9, the limit plate 8 is radially arranged on the inner cavity 4, and the ball 7 is located between the limit plate 8 and the blowout preventer 6.

[0020] A limit seat 10 is provided at one end of the blowout preventer 6, and a limit ring 11 is provided at the other end. A sealing ring 13 is provided on the inner end face of the limit ring. The end face of the limit seat 10 is an arc face. A sealing ring groove 12 is provided on the end face of the vent hole 5, and a sealing ring 13 is provided in the sealing ring groove 12.

[0021] The area of ​​the limit plate 8 is smaller than the area of ​​the cross section of the inner cavity 4, the diameter of the ball 7 is larger than the inner tube diameter of the lubricant preventer 6, the through hole 9 is smaller than or equal to the inner tube diameter of the lubricant preventer 6, the drill rod 1 is connected with the drill rod 1, and extends into the coal seam to transport the gas to the ground, the male connector 2 of one drill rod 1 is connected with the female connector 3 of another drill rod 1, and the head of the male connector 2 will push the lubricant preventer 6 to move until it is completely against the lubricant, and the through hole 9 of the lubricant preventer 6 moves to the end of the inner cavity 4, The gas is smoothly transported from the perforation 9, the limit ring of the blowout preventer 6 abuts against the end face of the vent hole 5, and the sealing ring 13 is located in between to prevent gas leakage from the connection, thereby realizing reverse sealing. When the rod is withdrawn, the male connector 2 rotates outward, and the gas pressure drives the ball 7 to block the blowout preventer 6. The limit seat 10 of the blowout preventer 6 abuts against the sealing ring 13 on the end face of the vent hole 5, and the perforation 9 moves into the vent hole 5, thereby realizing single-flow control and positive sealing to prevent gas leakage.

[0022] During use, the internal material flow direction of the drill pipe 1 of the utility model is from the male joint 2 to the female joint 3. The blowout preventer 6 can slide back and forth in the vent 5. The gas pressure in the coal seam can drive the ball 7 to block the blowout preventer 6. The limit seat 10 of the blowout preventer 6 abuts against the sealing ring 13 on the end face of the vent 5, realizing single-flow control and two-way sealing, thereby preventing gas leakage when the drill pipe 1 is installed and withdrawn.

[0023] The above description shows and describes several preferred embodiments of the utility model, but as mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A high-pressure sealed blowout-proof drill pipe, comprising: Drill rod; one end of the drill rod is a male joint, and the other end is a female joint, the outer surface of the male joint is provided with a thread, and the inner surface of the female joint is provided with a thread; It is characterized in that the drill rod has an inner cavity, and both the male joint and the female joint have vents, the vents are connected to the inner cavity, and the female joint is provided with a blowout preventer, a ball and a limit plate, the blowout preventer is passed through the vent, the diameters of the two ends of the blowout preventer are larger than the diameter of the vent, and the surface of the blowout preventer is provided with perforations, the limit plate is radially arranged on the inner cavity, and the ball is located between the limit plate and the blowout preventer.

2. The high pressure sealed blowout prevention drill pipe according to claim 1, characterized in that: One end of the anti-blowout pipe is provided with a limiting seat, and the other end is provided with a limiting ring.

3. The high pressure sealed blowout prevention drill pipe according to claim 2, characterized in that: A sealing ring is arranged on the inner end surface of the limiting ring.

4. The high pressure sealed blowout prevention drill pipe according to claim 2, characterized in that: The end surface of the limiting seat is an arc surface.

5. The high pressure sealed blowout prevention drill pipe according to claim 1, characterized in that: A sealing ring groove is arranged on the end surface of the vent hole, and a sealing ring is arranged in the sealing ring groove.

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