CN216631754U - Auxiliary device for checking screw thread of drill rod - Google Patents

Abstract

The utility model discloses a drill rod screw thread inspection auxiliary device, which relates to the technical field of oilfield drilling auxiliary equipment and comprises a plug body and a piston rod, wherein the plug body is an inverted frustum-shaped component with a hollow inner cavity, the taper of the plug body is matched with the inner taper of a female buckle end of a drill rod, a suction pipe communicated with the inner cavity is arranged on the lower end surface of the plug body, and a hollow holding rod is fixedly connected to an opening at the upper end of the inner cavity; the piston rod is arranged in the holding rod in a vertically sliding manner, the lower end of the piston rod is provided with a piston, and the upper end of the piston rod is provided with a pull ring; the piston is arranged in the inner cavity of the plug body in an axial sliding and sealing manner, and the lower end surface of the holding rod provides limit for the up-and-down sliding of the piston; this device simple structure, the practicality is strong, only needs to put into the female knot end of drilling rod with it during the use, just can easily realize replacing of mud removing, then can further discharge partial mud through the suction, has promoted work efficiency effectively.

Description

A kind of auxiliary device for inspection of drill pipe thread

technical field

The utility model relates to the technical field of oilfield drilling auxiliary equipment, in particular to an auxiliary device for checking drill pipe threads.

Background technique

In the process of drilling and production in the oil field, connecting the drilling tool and tripping the drilling is an essential process. In these processes, it is necessary to check the thread of the drilling tool and apply the thread sealing grease. The traditional method is to use a mop head to stir in the female end of the drill pipe or use a mineral water bottle to pour out the mud, which has the disadvantages of backward technology and low work efficiency.

Chinese patent CN202169262U discloses a pneumatic drill pipe screw cleaning device, the technical scheme of which is: including an oil supply part and a cleaning part, the oil supply part is composed of an oil suction pipe, an oil pump, an oil injection pipe, etc., and the oil suction pipe is installed in the oil pump. On the oil suction port, the oil injection pipe is installed on the oil outlet of the oil pump; the cleaning part consists of a frame, a wire brush, a rotating body, a shield, a transmission shaft, a cam, a bearing, etc. The oil pump is fixed on the frame, and the transmission shaft passes through the bearing. It is fixed in the seat hole of the frame, the rotating body is fixed on the frame, the rotating body is fixedly connected with the transmission shaft, the cam is fixed on the transmission shaft, the protective cover is fixed on the outside of the cam, and the wire brush is fixed on the rotating body; the cleaning device cannot rely on its own. The structure replaces the mud at the end of the female buckle, and its structure is complex, and it is used in the cleaning process after the mud is removed.

Under this background, it is imperative to design and manufacture an auxiliary device for inspection of drill pipe thread.

Utility model content

The purpose of the utility model is to provide an auxiliary device for checking the screw thread of a drill pipe, aiming at the defects existing in the prior art.

The technical scheme of the utility model is as follows: an auxiliary device for inspection of a drill pipe thread, comprising a plug body and a piston rod, wherein the plug body is a rounded truncated member with a hollow inner cavity, the taper of which is the same as the inner taper of the female buckle end of the drill pipe The lower end surface is provided with a suction pipe that communicates with the inner cavity, and the upper end opening of the inner cavity is fixedly connected with a hollow holding rod; the piston rod is slid up and down in the holding rod, and the lower end is provided with a piston , the upper end is provided with a pull ring; the axial sliding seal of the piston is arranged in the cavity of the plug body, and the lower end surface of the holding rod provides a limit for the up and down sliding of the piston.

Preferably, the outer wall of the lower part of the plug body is provided with an outer step seat adapted to the inner step seat of the female buckle end of the drill pipe, and the plug body at the lower part of the outer step seat is in the shape of a round rod, and its outer diameter is slightly smaller than that of the drill pipe the inner diameter.

Preferably, the maximum outer diameter of the plug body is 125 mm, and the outer diameter of the plug at the lower part of the outer step seat is 75 mm.

Preferably, an annular positioning plate is also included, the positioning plate is sleeved on the outer side of the holding rod and coaxially arranged with the holding rod, and is fixedly connected to the upper end of the plug body through a plurality of connecting rods; the inner diameter of the positioning plate is larger than that of the holding rod. The outer diameter of the holding rod is larger than the outer diameter of the female end of the drill pipe; when the positioning plate is in contact with the female end of the drill pipe, the outer stepped seat of the plug is abutted against the inner stepped seat of the drill pipe female end.

Preferably, the four connecting rods are arranged in a circular array with the holding rod as the axis.

Preferably, the outer side of the connecting rod and the outer wall of the plug on the upper part of the outer step seat are provided with brushes for cleaning the inner wall of the female end of the drill pipe, and the brush is attached to the inner wall of the female end of the drill pipe.

Preferably, the plug body is made of wood material or resin material, and the piston is made of rubber material.

Preferably, a plurality of suction pipes are arranged on the lower end surface of the plug body, and the plurality of suction pipes are evenly arranged.

Compared with the prior art, the utility model has the following advantages:

(1) The device has a simple structure and strong practicability. When using it, the mud can be easily replaced by simply putting it into the female end of the drill pipe, and then part of the mud can be further discharged by suction, which effectively improves the work. efficiency;

(2) The use of this device can quickly remove the mud in the socket end of the drill pipe, which is convenient for checking the thread of the drill tool, the inner step seat and the application of thread sealant;

(3) A positioning plate is fixed on the top of the plug body of the device. During the suction operation, the positioning plate is supported on the upper end of the female end of the drill pipe, and then the piston rod is pulled for suction. The setting of the positioning plate further improves the mud The stability of the device during the suction operation makes it easier to operate;

(4) There are brushes on the outer side of the connecting rod of the device and the outer wall of the plug on the upper part of the outer step seat for cleaning the inner wall of the box end of the drill pipe. Follow-up inspection of drilling tool threads.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present utility model;

Fig. 2 is the sectional schematic diagram of Fig. 1;

FIG. 3 is a schematic diagram of the use state of the present invention.

In the figure: 1. Plug body, 101, Inner cavity, 102, Outer step seat, 2. Piston rod, 3. Suction tube, 4. Holding rod, 5. Piston, 6. Pull ring, 7. Positioning plate, 8, connecting rod, 9, brush.

Detailed ways

The following is a further description of the present utility model in conjunction with the accompanying drawings and embodiments.

Example 1

Referring to Figures 1-2, an auxiliary device for inspection of drill pipe threads includes a plug body 1 and a piston rod 2. The plug body 1 is a rounded truncated member with a hollow inner cavity 101, the taper of which is the same as that of the socket end of the drill pipe. The inner taper is adapted, and its lower end surface is provided with a suction tube 3 communicating with the inner cavity 101, and a hollow holding rod 4 is fixedly connected to the upper opening of the inner cavity 101; the piston rod 2 slides up and down and is arranged in the holding rod 4 The lower end is provided with a piston 5, and the upper end is provided with a pull ring 6; the piston 5 is axially slidably sealed in the inner cavity 101 of the plug body 1, and the lower end surface of the holding rod 4 provides a limit for the up and down sliding of the piston 5.

Referring to FIG. 2 , the piston 5 in the initial device is located at the lowest end of the inner cavity 101 of the plug body 1 ; when in use, the device is put into the socket end of the drill rod, and the socket end is squeezed by the plug body 1 . Part of the mud will be easily replaced; then the operator presses the holding rod 4 downward, and pulls the piston rod 2 upward through the pull ring 6, and part of the mud at the bottom of the plug body 1 is sucked into the plug body through the suction pipe 3 1 in the inner cavity 101 (refer to Figure 3); then remove the device and drain the mud in the inner cavity 101 of the plug body 1; finally, visually inspect the thread of the drill tool and the inner step seat, and apply thread sealant after cleaning .

The device is simple in structure and strong in practicability. When in use, it is only necessary to put it into the female end of the drill pipe, and the mud can be easily replaced, and then part of the mud can be further discharged by suction, which effectively improves the work efficiency; The device can quickly remove the mud in the socket end of the drill pipe, which is convenient for checking the thread of the drill tool, the inner step seat and the application of thread sealing grease.

Embodiment 2

Referring to Figures 1-2, an auxiliary device for inspection of drill pipe threads includes a plug body 1 and a piston rod 2. The plug body 1 is a rounded truncated member with a hollow inner cavity 101, the taper of which is the same as that of the socket end of the drill pipe. The inner taper is adapted, and its lower end surface is provided with a suction tube 3 communicating with the inner cavity 101, and a hollow holding rod 4 is fixedly connected to the upper opening of the inner cavity 101; the piston rod 2 slides up and down and is arranged in the holding rod 4 The lower end is provided with a piston 5, and the upper end is provided with a pull ring 6; the piston 5 is axially slidably sealed in the inner cavity 101 of the plug body 1, and the lower end surface of the holding rod 4 provides a limit for the up and down sliding of the piston 5.

In addition, the difference between this embodiment and the first embodiment is that the outer wall of the plug body 1 is provided with an outer step seat 102, specifically:

In this embodiment, the outer wall of the lower part of the plug body 1 is provided with an outer step seat 102 which is adapted to the inner step seat of the female buckle end of the drill pipe. smaller than the inner diameter of the drill pipe.

In more detail, the maximum outer diameter of the plug body 1 is 125 mm, and the outer diameter of the plug body 1 at the lower part of the outer step seat 102 is 75 mm.

When in use, the device is put into the female end of the drill pipe, the outer step seat 102 of the plug body 1 is in contact with the inner step seat of the female end of the drill pipe, and the plug body 1 at the lower part of the outer step seat 102 enters the inner cavity 101 of the drill pipe. , this setting can quickly replace more mud, which further improves work efficiency.

Embodiment 3

Referring to Figures 1-2, an auxiliary device for inspection of drill pipe threads includes a plug body 1 and a piston rod 2. The plug body 1 is a rounded truncated member with a hollow inner cavity 101, the taper of which is the same as that of the socket end of the drill pipe. The inner taper is adapted, and its lower end surface is provided with a suction tube 3 communicating with the inner cavity 101, and a hollow holding rod 4 is fixedly connected to the upper opening of the inner cavity 101; the piston rod 2 slides up and down and is arranged in the holding rod 4 The lower end is provided with a piston 5, and the upper end is provided with a pull ring 6; the piston 5 is axially slidably sealed in the inner cavity 101 of the plug body 1, and the lower end surface of the holding rod 4 provides a limit for the up and down sliding of the piston 5.

In addition, the outer wall of the lower part of the plug body 1 is provided with an outer step seat 102 which is adapted to the inner step seat of the female buckle end of the drill pipe. the inside diameter of.

The maximum outer diameter of the plug body 1 is 125 mm, and the outer diameter of the plug body 1 at the lower part of the outer step seat 102 is 75 mm.

In addition, this embodiment adds a positioning plate 7 above the plug body 1 on the basis of the second embodiment, specifically:

This embodiment also includes an annular positioning plate 7, which is sleeved on the outer side of the holding rod 4 and coaxially arranged with the holding rod 4, and is fixedly connected to the upper end of the plug body 1 through four connecting rods 8; The inner diameter is larger than the outer diameter of the holding rod 4, and its outer diameter is larger than the outer diameter of the female end of the drill pipe; when the positioning plate 7 is in contact with the upper end of the female end of the drill pipe, the outer stepped seat 102 of the plug body 1 is connected to the inner end of the female end of the drill pipe. The step seats meet.

In more detail, the four connecting rods 8 are arranged in a circular array with the holding rod 4 as the axis.

When in use, the mud squeezed by the plug body 1 can flow between the connecting rods 8; during the suction operation, the positioning plate 7 is supported on the upper end of the female end of the drill rod, and then the piston rod 2 is pulled for suction, This setting further improves the stability of the device during the mud suction operation, making it easier to operate.

Embodiment 4

Referring to Figures 1-2, an auxiliary device for inspection of drill pipe threads includes a plug body 1 and a piston rod 2. The plug body 1 is a rounded truncated member with a hollow inner cavity 101, the taper of which is the same as that of the socket end of the drill pipe. The inner taper is adapted, and its lower end surface is provided with a suction tube 3 communicating with the inner cavity 101, and a hollow holding rod 4 is fixedly connected to the upper opening of the inner cavity 101; the piston rod 2 slides up and down and is arranged in the holding rod 4 The lower end is provided with a piston 5, and the upper end is provided with a pull ring 6; the piston 5 is axially slidably sealed in the inner cavity 101 of the plug body 1, and the lower end surface of the holding rod 4 provides a limit for the up and down sliding of the piston 5.

In addition, the outer wall of the lower part of the plug body 1 is provided with an outer step seat 102 which is adapted to the inner step seat of the female buckle end of the drill pipe. the inside diameter of.

The maximum outer diameter of the plug body 1 is 125 mm, and the outer diameter of the plug body 1 at the lower part of the outer step seat 102 is 75 mm.

The device also includes an annular positioning plate 7, which is sleeved on the outer side of the holding rod 4 and coaxially arranged with the holding rod 4, and is fixedly connected to the upper end of the plug body 1 through four connecting rods 8; the inner diameter of the positioning plate 7 is It is larger than the outer diameter of the holding rod 4, and its outer diameter is larger than the outer diameter of the box end of the drill pipe; when the positioning plate 7 is in contact with the upper end of the box end of the drill pipe, the outer step seat 102 of the plug body 1 is connected to the inner step of the box end of the drill pipe. Seats meet.

In more detail, the four connecting rods 8 are arranged in a circular array with the holding rod 4 as the axis.

In addition, this embodiment adds a brush 9 on the outer wall of the plug body 1 on the basis of the third embodiment, specifically:

In this embodiment, both the outer side of the connecting rod 8 and the outer wall of the plug body 1 on the upper part of the outer step seat 102 are provided with a brush 9 for cleaning the inner wall of the box end of the drill pipe, and the brush 9 is attached to the box of the drill pipe on the inner wall of the end.

After the suction operation is completed, manually rotate the positioning plate 7 to make the brushes 9 on the outer side of the connecting rod 8 and the outer wall of the upper plug body 1 of the outer step seat 102 to preliminarily clean the inner thread of the box end of the drill pipe, which is convenient for subsequent drilling. Threaded for inspection.

Embodiment 5

Referring to Figures 1-2, an auxiliary device for inspection of drill pipe threads includes a plug body 1 and a piston rod 2. The plug body 1 is a rounded truncated member with a hollow inner cavity 101, the taper of which is the same as that of the socket end of the drill pipe. The inner taper is adapted, and its lower end surface is provided with a suction tube 3 communicating with the inner cavity 101, and a hollow holding rod 4 is fixedly connected to the upper opening of the inner cavity 101; the piston rod 2 slides up and down and is arranged in the holding rod 4 The lower end is provided with a piston 5, and the upper end is provided with a pull ring 6; the piston 5 is axially slidably sealed in the inner cavity 101 of the plug body 1, and the lower end surface of the holding rod 4 provides a limit for the up and down sliding of the piston 5.

In addition, the outer wall of the lower part of the plug body 1 is provided with an outer step seat 102 which is adapted to the inner step seat of the female buckle end of the drill pipe. the inside diameter of.

The maximum outer diameter of the plug body 1 is 125 mm, and the outer diameter of the plug body 1 at the lower part of the outer step seat 102 is 75 mm.

The device also includes an annular positioning plate 7, which is sleeved on the outer side of the holding rod 4 and coaxially arranged with the holding rod 4, and is fixedly connected to the upper end of the plug body 1 through four connecting rods 8; the inner diameter of the positioning plate 7 is It is larger than the outer diameter of the holding rod 4, and its outer diameter is larger than the outer diameter of the box end of the drill pipe; when the positioning plate 7 is in contact with the upper end of the box end of the drill pipe, the outer step seat 102 of the plug body 1 is connected to the inner step of the box end of the drill pipe. Seats meet.

In more detail, the four connecting rods 8 are arranged in a circular array with the holding rod 4 as the axis.

The outer side of the connecting rod 8 and the outer wall of the plug body 1 on the upper part of the outer step seat 102 are provided with brushes 9 for cleaning the inner wall of the female end of the drill pipe. The brush 9 is attached to the inner wall of the female end of the drill pipe.

In addition, this embodiment limits the material of each component of the device on the basis of the fourth embodiment, specifically:

In this embodiment, the plug body 1 is made of wood material or resin material, and the piston 5 is made of rubber material.

Embodiment 6

Referring to Figures 1-2, an auxiliary device for inspection of drill pipe threads includes a plug body 1 and a piston rod 2. The plug body 1 is a rounded truncated member with a hollow inner cavity 101, the taper of which is the same as that of the socket end of the drill pipe. The inner taper is adapted, and its lower end surface is provided with a suction tube 3 communicating with the inner cavity 101, and a hollow holding rod 4 is fixedly connected to the upper opening of the inner cavity 101; the piston rod 2 slides up and down and is arranged in the holding rod 4 The lower end is provided with a piston 5, and the upper end is provided with a pull ring 6; the piston 5 is axially slidably sealed in the inner cavity 101 of the plug body 1, and the lower end surface of the holding rod 4 provides a limit for the up and down sliding of the piston 5.

In addition, the outer wall of the lower part of the plug body 1 is provided with an outer step seat 102 which is adapted to the inner step seat of the female buckle end of the drill pipe. the inside diameter of.

The maximum outer diameter of the plug body 1 is 125 mm, and the outer diameter of the plug body 1 at the lower part of the outer step seat 102 is 75 mm.

The device also includes an annular positioning plate 7, which is sleeved on the outer side of the holding rod 4 and coaxially arranged with the holding rod 4, and is fixedly connected to the upper end of the plug body 1 through four connecting rods 8; the inner diameter of the positioning plate 7 is It is larger than the outer diameter of the holding rod 4, and its outer diameter is larger than the outer diameter of the box end of the drill pipe; when the positioning plate 7 is in contact with the upper end of the box end of the drill pipe, the outer step seat 102 of the plug body 1 is connected to the inner step of the box end of the drill pipe. Seats meet.

In more detail, the four connecting rods 8 are arranged in a circular array with the holding rod 4 as the axis.

The outer side of the connecting rod 8 and the outer wall of the plug body 1 on the upper part of the outer step seat 102 are provided with brushes 9 for cleaning the inner wall of the female end of the drill pipe. The brush 9 is attached to the inner wall of the female end of the drill pipe.

In addition, in order to improve the suction efficiency of the device for mud, this embodiment optimizes the setting of the suction pipe 3 on the basis of the fourth embodiment, specifically:

In this embodiment, a plurality of suction pipes 3 are provided on the lower end surface of the plug body 1, and the plurality of suction pipes 3 are evenly arranged.

The present invention is not limited to the above-mentioned embodiments, and within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the purpose of the present invention, and the changed content still belongs to the present invention scope of protection.

Claims (8)

1. A drill rod screw inspection auxiliary device, comprising a plug body, characterized in that: also comprising a piston rod, and the plug body is a rounded truncated member with a hollow inner cavity, the taper of which is the same as the inner taper of the socket end of the drill rod. The lower end surface is provided with a suction pipe that communicates with the inner cavity, and the upper end opening of the inner cavity is fixedly connected with a hollow holding rod; the piston rod is slid up and down in the holding rod, and the lower end is provided with a piston , the upper end is provided with a pull ring; the axial sliding seal of the piston is arranged in the cavity of the plug body, and the lower end surface of the holding rod provides a limit for the up and down sliding of the piston. 2. An auxiliary device for checking drill pipe thread according to claim 1, characterized in that: the outer wall of the lower part of the plug body is provided with an outer step seat adapted to the inner step seat at the female end of the drill pipe, so The plug body at the lower part of the outer step seat is in the shape of a round rod, and its outer diameter is slightly smaller than the inner diameter of the drill pipe. 3 . The auxiliary device for inspection of drill pipe thread according to claim 2 , wherein the maximum outer diameter of the plug body is 125 mm, and the outer diameter of the plug at the lower part of the outer step seat is 75 mm. 4 . 4. An auxiliary device for inspection of drill pipe thread according to claim 2, characterized in that it further comprises an annular positioning plate, the positioning plate is sleeved on the outside of the holding rod and is coaxially arranged with the holding rod, and its It is fixedly connected to the upper end of the plug body through a plurality of connecting rods; the inner diameter of the positioning plate is larger than the outer diameter of the holding rod, and its outer diameter is larger than the outer diameter of the female end of the drill pipe; when the positioning plate is in contact with the female end of the drill pipe At the time, the outer stepped seat of the plug is abutted against the inner stepped seat of the female buckle end of the drill pipe. 5 . The auxiliary device for inspection of a drill pipe thread according to claim 4 , wherein the four connecting rods are arranged in a circular array with the holding rod as the axis. 6 . 6. An auxiliary device for checking drill pipe thread according to claim 5, characterized in that: the outer side of the connecting rod and the outer wall of the plug on the upper part of the outer step seat are provided with an inner wall for cleaning the inner wall of the socket end of the drill pipe The brush is attached to the inner wall of the female end of the drill pipe. 7 . The auxiliary device for inspection of drill pipe thread according to claim 1 , wherein the plug body is made of wood material or resin material, and the piston is made of rubber material. 8 . 8 . The auxiliary device for inspection of drill pipe thread according to claim 1 , wherein a plurality of suction pipes are arranged on the lower end surface of the plug body, and the plurality of suction pipes are evenly arranged. 9 .

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