Water braid for self-locking drill pipe and use method of water braid

Abstract

The invention relates to a self-locking type water braid for a drill rod and a using method of the water braid, and belongs to the technical field of coal mines. Comprising a water braid body and a self-resetting ejector rod located at the front end of the water braid. The water braid body is installed on the water braid shell through the bearing and the pressing cover, the water braid shell can rotate around the water braid inner sleeve, water flow can pass through an inner hole of the water braid shell, and therefore water is supplied to a drill rod through the water braid shell. The self-resetting ejector rod is installed in the water braid shell and rotates along with the shell in the using process, communication of the front hole series and the rear hole series of the water braid is completed, and water in the water braid inner sleeve flows to the hole series of the water braid shell. When cooling water with proper pressure is introduced into the water braid, the self-resetting ejector rod tightly ejects the self-locking core rod of the forward and reverse rotation drill rod under the action of the pressure, and mutual self-locking of the drill rod after connection is achieved. By means of the design, it is guaranteed that no matter whether the drill rod rotates forwards or reversely, disengagement is avoided, and therefore the stability and safety of drill rod connection are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mines and relates to a self-locking drill pipe water braid and a use method thereof. Background Art

[0002] As the depth of coal mining increases, the mine pressure continues to increase, and the requirements for drilling technology also increase accordingly. In coal mine drilling operations, the use of reverse drill rods is becoming more and more common. Existing threaded reverse drill rods usually use the core self-locking ratchet mechanism to move axially to achieve a rigid self-locking connection between the front and rear drill rods or the active drill rod and the drill rod. However, the self-locking mechanism of the last drill rod is crucial to whether the drill rod force transmission mechanism of the drilling rig can effectively achieve positive and reverse self-locking.

[0003] At present, the main method of achieving self-locking is to move the water braid at the tail end of the active drill pipe back and forth, and the water braid and the active drill pipe are connected by non-threaded sealing to realize the transmission of the active drill pipe self-locking mechanism, thereby realizing the self-locking of the active drill pipe and the drill pipe. The complexity, stability, sealing and efficiency of this structure need to be improved. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a self-locking drill pipe water braid and a method of using the same, so as to achieve self-locking of the water braid and the drill pipe or active drill pipe, thereby improving the reliability, sealing and efficiency of the connection.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A self-locking drill pipe water braid, comprising:

[0007] The water braid inner sleeve is installed on the water braid shell through a compression cover. The water braid shell is arranged to rotate around the water braid inner sleeve, and its inner hole can pass water;

[0008] The water braid housing is combined with the water braid inner sleeve on one side, cooperates with the water braid inner sleeve to form a seal through the sealing hole, cooperates with the self-resetting push rod through the sliding sealing cavity, is connected with the self-resetting push rod at the water outlet, allows the self-resetting push rod to slide freely through the push rod guide hole, and is connected to the adjacent drill pipe;

[0009] The self-resetting push rod is installed in the water braid shell and rotates with the shell. It is connected with the water in the inner sleeve of the water braid through the sink hole, allows water to pass through the water hole, is connected with the water outlet hole of the water braid shell through the annular groove, and slides in the push rod guide hole of the water braid shell through the guide rod.

[0010] Optionally, a bearing is arranged on the inner sleeve of the water braid, a bearing mounting hole for mounting the bearing is arranged on the water braid shell, and the water braid is mounted on the water braid shell through the bearing and a clamping cover.

[0011] Optionally, the self-resetting push rod is connected to an adjacent drill rod via a connecting thread.

[0012] Optionally, a sealing ring is provided between the water braid shell and the water braid inner sleeve to ensure pressure transmission and water transmission.

[0013] Optionally, the self-resetting push rod can move forward and backward under the action of water pressure, thereby realizing the transmission of water pressure.

[0014] Optionally, the connecting threads on the water braid housing are connected to corresponding threads of the adjacent drill rods to achieve connection and sealing of the drill rods.

[0015] A method for using a self-locking drill pipe water braid, based on the above-mentioned self-locking drill pipe water braid, the method comprises:

[0016] Screw the water braid to the tail end of the reverse drill pipe;

[0017] Inject pressurized water to move the reverse drill rod self-locking device forward and self-lock with the adjacent drill rod fixed on the drilling rig;

[0018] Cut off the pressure water, so that the self-locking device is unlocked from the adjacent drill pipe under the action of the spring force;

[0019] Reverse the chuck to disassemble adjacent drill rods.

[0020] Optionally, the water braid and the drill pipe are interlocked while rotating to supply water, ensuring that an effective connection is maintained during forward and reverse rotation.

[0021] The beneficial effects of the present invention are:

[0022] Simplified structure: the present invention simplifies the complexity of the self-locking mechanism and improves the stability of the overall structure by optimizing the connection structure between the water braid and the drill pipe.

[0023] Improved sealing performance: By improving the sealing design of the water braid shell and the water braid inner sleeve, the present invention significantly improves the sealing performance and ensures reliability and durability in a high-pressure water environment.

[0024] Improved efficiency: The present invention adopts an improved self-resetting mandrel design, so that the water braid can be interlocked with the drill pipe while rotating to supply water, thereby improving the connection efficiency and reducing the operation steps and time.

[0025] Forward and reverse self-locking: The water braid design of the present invention can maintain effective connection during both forward and reverse rotation, ensuring the stability and safety of the drill pipe under different working conditions.

[0026] Easy to operate and maintain: The structural design of the present invention makes the installation and disassembly of the water braid easier, reducing the maintenance difficulty and cost.

[0027] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0029] Figure 1 It is the structural principle diagram;

[0030] Figure 2 It is a schematic diagram of a self-resetting ejector rod;

[0031] Figure 3 Schematic diagram of forward and reverse drilling rod.

[0032] Figure numerals: water braid inner sleeve 1, pressing cover 2, bearing 3, water braid housing 4, self-resetting push rod 5, reset spring 6, bearing mounting hole 41, sealing hole 42, sliding sealing chamber 43, water outlet hole 44, push rod guide hole 45, connecting thread 46, sink hole 51, water through hole 52, annular groove 53, guide rod 54. DETAILED DESCRIPTION

[0033] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0034] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0035] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] See also Figure 1 to Figure 3 It is a self-locking drill pipe braid, which consists of a braid body 1 and a self-resetting push rod 2 at the front end of the braid. When cooling water of appropriate pressure is passed into the braid body 1, the self-resetting push rod 2, under the action of pressure, presses the self-locking core rod 3 of the forward and reverse drill pipe, so that the drill pipes are self-locked after being connected. This design ensures that no matter whether the drill pipes are forward or reverse, the drill pipes will not be separated, thereby improving the stability and safety of the drill pipe connection.

[0037] The self-locking drill pipe water braid is mainly composed of the following components:

[0038] Water braid inner sleeve 1: It is installed on the water braid shell 4 through the bearing 3 and the clamping cover 2. The water braid shell 4 can rotate around the water braid inner sleeve 1, and its inner hole allows water to flow through, thereby realizing water supply to the drill pipe through the water braid shell.

[0039] Water braid housing 4: One end of the housing is combined with the water braid inner sleeve 1, and the other end is equipped with a self-resetting push rod 5. The main structure of the water braid housing 4 includes a bearing mounting hole 41, a sealing hole 42, a sliding sealing cavity 43, a water outlet hole 44, a push rod guide hole 45 and a connecting thread 46. The sealing hole 42 cooperates with the water braid inner sleeve 1 to form a seal under the action of the sealing ring to ensure pressure transmission and water flow transmission; the sliding sealing cavity 43 cooperates with the self-resetting push rod 5 to achieve the forward and backward movement of the self-resetting push rod under the action of water pressure, thereby transmitting water pressure; when the water pressure reaches a certain value, the water outlet hole 44 allows the self-resetting push rod 5 to move forward, so that the water in the water braid inner sleeve 1 is connected through the hole system in the self-resetting push rod 5 and flows to the hole system of the next drill rod; the push rod guide hole 45 allows the self-resetting push rod 5 to slide freely therein; the connecting thread 46 is connected with the thread of the adjacent drill rod to achieve the connection of the drill rod and ensure the corresponding sealing function.

[0040] Self-resetting push rod 5: installed in the water braid housing 4, rotates with the housing during use, completes the connection of the front and rear holes of the water braid, and realizes that the water in the water braid inner sleeve 1 flows to the hole system of the water braid housing 4. The self-resetting push rod 5 is mainly composed of a sink hole 51, a water hole 52, an annular groove 53 and a guide rod 54. The water in the water braid inner sleeve 1 is connected to the water outlet hole 44 of the water braid housing 4 through the sink hole 51, the water hole 52 and the annular groove 53.

[0041] Figure 3 The figure is a schematic diagram of a forward and reverse drill rod, where A represents the drill rod body, B represents the self-locking device, and C represents the reset spring. The drill rod body 1 is used to connect adjacent drill rods. After connection, the self-locking device B is embedded in the tooth profile of the drill rod body A under the action of external force, thereby realizing the self-locking of adjacent drill rods. When the external force is removed, the self-locking device B, under the action of the reset spring C, separates the meshing tooth profiles from each other, thereby realizing mutual separation when the adjacent drill rods rotate.

[0042] The main function of the water braid is to achieve self-locking of the active drill pipe and the forward and reverse drill pipe. The following are the detailed steps for self-locking and unlocking the drill pipe:

[0043] Drill rod self-locking:

[0044] (1) Fix the reverse drill rod on the drilling rig chuck or other device;

[0045] (2) Screw the water braid into the drill pipe fixed on the drilling rig;

[0046] (3) Screw the added reverse drill rod into the reverse drill rod fixed on the drilling rig;

[0047] (4) Pressurized water is injected into the water braid to move the reverse drill pipe self-locking device forward and self-lock with the drill pipe adjacent to the drill pipe fixed on the drilling rig.

[0048] Drill rod unlock:

[0049] (1) Cut off the pressurized water in the water braid, so that the reverse drill rod self-locking device fixed on the drilling rig is unlocked from the adjacent drill rod under the action of the reset spring 6;

[0050] (2) Reverse the chuck to disassemble the adjacent drill rods.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A self-locking drill pipe water braid, characterized in that: include: The water braid inner sleeve is installed on the water braid shell through a compression cover. The water braid shell is arranged to rotate around the water braid inner sleeve, and its inner hole can pass water; The water braid housing is combined with the water braid inner sleeve on one side, cooperates with the water braid inner sleeve to form a seal through the sealing hole, cooperates with the self-resetting push rod through the sliding sealing cavity, is connected with the self-resetting push rod at the water outlet, allows the self-resetting push rod to slide freely through the push rod guide hole, and is connected to the adjacent drill pipe; The self-resetting push rod is installed in the water braid shell and rotates with the shell. It is connected with the water in the inner sleeve of the water braid through the sink hole, allows water to pass through the water hole, is connected with the water outlet hole of the water braid shell through the annular groove, and slides in the push rod guide hole of the water braid shell through the guide rod.

2. The self-locking drill pipe water braid according to claim 1, characterized in that: A bearing is arranged on the inner sleeve of the water braid, a bearing mounting hole for mounting the bearing is arranged on the water braid shell, and the water braid is mounted on the water braid shell through the bearing and a clamping cover.

3. The self-locking drill pipe water braid according to claim 1, characterized in that: The self-resetting push rod is connected to the adjacent drill rod through a connecting thread.

4. The self-locking drill pipe water braid according to claim 1, characterized in that: A sealing ring is arranged between the water braid shell and the water braid inner sleeve to ensure the transmission of pressure and water.

5. The self-locking drill pipe water braid according to claim 1, characterized in that: The self-resetting push rod moves forward and backward under the action of water pressure, thereby realizing the transmission of water pressure.

6. The self-locking drill pipe water braid according to claim 1, characterized in that: The connecting threads on the water braid housing are connected with the corresponding threads of the adjacent drill rods to achieve the connection and sealing of the drill rods.

7. The method for using the self-locking drill pipe water braid is characterized by: Based on the self-locking drill pipe water braid described in any one of claims 1 to 6, the method comprises: Screw the water braid to the tail end of the reverse drill pipe; Inject pressurized water to move the reverse drill rod self-locking device forward and self-lock with the adjacent drill rod fixed on the drilling rig; Cut off the pressure water, so that the self-locking device is unlocked from the adjacent drill pipe under the action of the spring force; Reverse the chuck to disassemble adjacent drill rods.

8. The method for using the self-locking drill pipe water braid according to claim 7, characterized in that: The water braid and the drill pipe are interlocked while rotating to supply water, ensuring effective connection during forward and reverse rotation.

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