Device for measuring J value of oil casing

Abstract

The invention discloses a device for measuring the J value of an oil casing. The device comprises a support, a worm gear lead screw lifting mechanism, a linear bearing, a dovetail groove cross-shaped sliding table, a double-shaft one-way air cylinder, a measuring mechanism 6, a platform and a controller. The device for measuring the J value of the oil casing has the following beneficial effects that the J value can be automatically measured through the HM I programmable controller and the electrical device. And the device can be combined with or separated from an assembling machine to adapt to field working conditions. The replacement of the limiting device can be used for detecting oil casings of different specifications. And the system has relatively high stability and anti-interference performance. And the simple secondary drift diameter operation can be synchronously completed.

Description

Technical Field

[0001] The invention belongs to the technical field of quality detection of special oil pipes, and in particular relates to a device for measuring the J value of an oil casing. Background Art

[0002] In the oil field, the API oil standard stipulates that the J value of commonly used oil casing is 12.7 mm ± 2 pitches. The oil casing includes the pipe body and the coupling. The J value is the distance between the outer end of the assembled oil casing and the center of the coupling assembled on the outer end of the pipe. For ease of measurement, it is usually measured directly to the outer end face of the coupling and then half of the coupling is subtracted. By measuring the J value, the processing quality of the pipe body and the threaded connection after the coupling is assembled can be clearly reflected. It is an important parameter in the oil casing quality standard.

[0003] Figure 4 FIG. 1 is a schematic diagram of a method for measuring the J value of oil casing in the prior art. Figure 4 As shown, after the assembled oil casing, the inspector inserts the depth gauge 18 into the coupling 17 and makes the inner end of the depth gauge 18 rest on the outer port of the pipe body 16, and observes the scale value of the outer port of the coupling 17 on the depth gauge 18 to calculate the J value. However, this measurement method has the following problems: after the pipe end thread processing of the pipe body 16 is completed, due to the extremely small end face annular spacing, and the coupling 17 is affected by the diameter of the coupling 17 and the thread buckle after assembly, it often leads to poor control of the measurement process, errors in the measurement data, and human factors cannot guarantee 100% measurement. Summary of the invention

[0004] In order to solve the above problems, the object of the present invention is to provide a device for measuring the J value of oil casing.

[0005] In order to achieve the above-mentioned purpose, the device for measuring the J value of oil casing provided by the present invention comprises a bracket, a worm gear screw lifting mechanism, a linear bearing, a dovetail groove cross slide, a double-axis one-way cylinder, a measuring mechanism 6, a platform and a controller; wherein the worm gear in the worm gear screw lifting mechanism is installed in the middle of the bracket, and the upper end of the screw is connected to the middle of the bottom surface of the platform above the bracket; at least two linear bearings are installed on both sides of the upper part of the bracket, and the upper ends are connected to the outer side of the bottom surface of the platform; the dovetail groove cross slide is installed on the top surface of the platform; the double-axis one-way cylinder 5 is horizontally arranged, and the cylinder body is installed on the dovetail groove cross slide; the measuring mechanism comprises a connecting plate, a reset spring, a movable plate, a rangefinder, a connecting rod and a limit device; the limit The device includes a limit platform, a diameter platform and a reducer and reducer; the limit platform is a circular plate structure and is vertically arranged; the two ends of the diameter platform are respectively connected to the middle of one side of the limit platform and the large end of the reducer and reducer; the connecting plate is vertically arranged, one side is connected to the moving end of the double-axis one-way cylinder, and the other side is connected to the other side of the limit platform through a connecting rod; the movable plate is vertically arranged, and the middle part is set through the middle of the connecting rod; the reset spring is installed on the connecting rod between the movable plate and the connecting plate, and the two ends are respectively connected to the movable plate and the connecting plate; the rangefinder is installed on the side of the movable plate facing the limit device, and corresponds to the position of the limit platform; the controller is electrically connected to the double-axis one-way cylinder 5 and the rangefinder respectively.

[0006] The controller adopts an HMI programmable controller, which is provided with a visual screen and an alarm device.

[0007] The rangefinder is a laser rangefinder.

[0008] The limiting device is made of nylon material or polytetrafluoroethylene material to avoid scratching the thread during movement.

[0009] The size of the drift platform is consistent with the radial size of the drift gauge of the oil casing inspection tool.

[0010] The worm gear screw lifting mechanism and the dovetail groove cross slide are provided with self-locking devices, and the connecting rod 11 is short and not easy to deform, thus effectively ensuring the stability of the device during long-term use.

[0011] The diameter of the limiting platform is less than or equal to the outer diameter of the tube end of the tube body and greater than the inner diameter of the tube body.

[0012] The movable plate is circular, and its diameter is larger than the outer diameter of the coupling.

[0013] The limiting device has various sizes to meet the needs of oil casings with different specifications.

[0014] The device for measuring the J value of oil casing provided by the present invention has the following beneficial effects:

[0015] 1. Automatic J value measurement can be achieved through HMI programmable controller and electrical devices.

[0016] 2. It can be combined or separated with the assembly machine to adapt to on-site working conditions.

[0017] 3. The replacement limit device can be used for the detection of oil casing with different specifications.

[0018] 4. It has strong stability and anti-interference ability.

[0019] 5. Simple secondary flow operation can be completed simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of a device for measuring the J value of an oil casing provided by the present invention.

[0021] Figure 2 A schematic diagram of a measuring mechanism in a device for measuring the J value of an oil casing provided by the present invention.

[0022] Figure 3 A schematic diagram of a limit device in a device for measuring the J value of an oil casing provided by the present invention.

[0023] Figure 4 The figure is a schematic diagram of a method for measuring the J value of oil casing in the prior art. DETAILED DESCRIPTION

[0024] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The same components as those in the prior art are given the same reference numerals.

[0025] like Figure 1-Figure 3As shown, the device for measuring the J value of oil casing provided by the present invention comprises a bracket 1, a worm gear screw lifting mechanism 2, a linear bearing 3, a dovetail groove cross slide 4, a double-axis one-way cylinder 5, a measuring mechanism 6, a platform 7 and a controller; wherein the worm gear in the worm gear screw lifting mechanism 2 is installed in the middle of the bracket 1, and the upper end of the screw is connected to the middle of the bottom surface of the platform 7 located above the bracket 1; at least two linear bearings 3 are installed on both sides of the upper part of the bracket 1, and the upper ends are connected to the outer side of the bottom surface of the platform 7; the dovetail groove cross slide 4 is installed on the top surface of the platform 7; the double-axis one-way cylinder 5 is horizontally arranged, and the cylinder body is installed on the dovetail groove cross slide 4; the measuring mechanism 6 comprises a connecting plate 7, a reset spring 8, a movable plate 9, a rangefinder 10, a connecting rod 11 and a limit device 12; the limit device 12 comprises a limit platform 1 3. The diameter platform 14 and the reducer and reducer 15; the limit platform 13 is a circular plate structure and is vertically arranged; the two ends of the diameter platform 14 are respectively connected to the middle of one side of the limit platform 13 and the large end of the reducer and reducer 15; the connecting plate 7 is vertically arranged, one side is connected to the moving end of the double-axis one-way cylinder 5, and the other side is connected to the other side of the limit platform 13 through the connecting rod 11; the movable plate 9 is vertically arranged, and the middle part is set through the middle part of the connecting rod 11; the reset spring 8 is installed on the connecting rod 11 between the movable plate 9 and the connecting plate 7, and the two ends are respectively connected to the movable plate 9 and the connecting plate 7; the rangefinder 10 is installed on the side of the movable plate 9 facing the limit device 12, and corresponds to the position of the limit platform 13; the controller is electrically connected to the double-axis one-way cylinder 5 and the rangefinder 10 respectively.

[0026] The controller adopts an HMI programmable controller, which is provided with a visual screen and an alarm device.

[0027] The rangefinder 10 is a laser rangefinder.

[0028] The limiting device 12 is made of nylon material or polytetrafluoroethylene material to avoid scratching the thread during movement.

[0029] The size of the diameter platform 14 is consistent with the radial size of the diameter gauge of the oil casing inspection tool.

[0030] The worm gear screw lifting mechanism 2 and the dovetail groove cross slide 4 are provided with self-locking devices, and the connecting rod 11 is short and not easy to deform, thus effectively ensuring the stability of the device during long-term use.

[0031] The diameter of the limiting platform 13 is smaller than or equal to the outer diameter of the tube end of the tube body 16 and larger than the inner diameter of the tube body 16 .

[0032] The movable plate 9 is circular, and its diameter is larger than the outer diameter of the coupling 17 .

[0033] The limiting device 12 has various sizes to meet the needs of oil casings with different specifications.

[0034] The method for using the device for measuring the J value of oil casing provided by the present invention is described as follows:

[0035] The device can be installed behind the assembly machine for measurement, or it can be installed at a separate workstation for measurement. After the coupling 17 is assembled at the outer end of the tube body 16 by the assembly machine, an electrical signal is sent to the controller. The position of the double-axis one-way cylinder 5 can be adjusted in advance by moving the dovetail groove cross slide 4 left and right and forward and backward. At the same time, the height of the double-axis one-way cylinder 5 is adjusted by the worm screw lifting mechanism 2, so that the measuring mechanism 6 is aligned with the outer port of the coupling 17. Under the control of the controller, the double-axis one-way cylinder 5 is used to push the measuring mechanism 6 in the direction of the coupling 17 and the tube body 16 until the edge of the movable plate 9 is stuck at the outer port of the coupling 17. When the double-axis one-way cylinder 5 continues to push the measuring mechanism 6, the limit device 12 will enter the inside of the coupling 17, and then the reducer 15 on it will enter the inside of the outer end of the tube body 16 until the edge of the limit platform 13 is accurately stuck at the outer port of the tube body 16, and the operation of the double-axis one-way cylinder 5 is stopped; the distance meter 10 is used to accurately measure the J value and transmit it to the controller, and the double-axis one-way cylinder 5 is retracted at the same time; the controller processes the above J value and displays it on the visual screen in real time. If it is found that the J value does not meet the AP When the J value is within the range specified by the petroleum standard, an alarm signal will be immediately sent out through the alarm device.

[0036] In addition, since the size of the diameter platform 14 in the limiting device 12 is consistent with the radial size of the diameter gauge of the oil casing inspection tool, a simple secondary diameter operation can be completed after assembly, thereby making the device have multiple functions.

Claims

1. A device for measuring the J value of oil casing, characterized in that: The device for measuring the J value of an oil casing comprises a bracket (1), a worm gear screw lifting mechanism (2), a linear bearing (3), a dovetail groove cross slide (4), a double-axis one-way cylinder (5), a measuring mechanism (6), a platform (7) and a controller; wherein the worm gear in the worm gear screw lifting mechanism (2) is installed in the middle of the bracket (1), and the upper end of the screw is connected to the middle of the bottom surface of the platform (7) located above the bracket (1); at least two linear bearings (3) are installed on both sides of the upper part of the bracket (1), and the upper ends are connected to the outer side of the bottom surface of the platform (7); the dovetail groove cross slide (4) is installed on the top surface of the platform 7; the double-axis one-way cylinder (5) is arranged horizontally, and the cylinder body is installed on the dovetail groove cross slide (4); the measuring mechanism (6) comprises a connecting plate (7), a reset spring (8), a movable plate (9), a distance meter (10), a connecting rod (11) and a limit device (12); the limit device (12) comprises a limit platform (13), The invention relates to a diameter platform (14) and a reducer (15); the limit platform (13) is a circular plate-shaped structure and is vertically arranged; the two ends of the diameter platform (14) are respectively connected to the middle of one side of the limit platform (13) and the large end of the reducer (15); the connecting plate (7) is vertically arranged, one side of which is connected to the moving end of the double-axis one-way cylinder (5), and the other side of which is connected to the other side of the limit platform (13) through a connecting rod (11); the movable plate (9) is vertically arranged, and the middle part thereof is arranged through the middle part of the connecting rod (11); the reset spring (8) is installed on the connecting rod (11) between the movable plate (9) and the connecting plate (7), and the two ends of the reset spring (8) are respectively connected to the movable plate (9) and the connecting plate (7); the distance meter (10) is installed on the side of the movable plate (9) facing the limit device (12), and corresponds to the position of the limit platform (13); the controller is respectively electrically connected to the double-axis one-way cylinder (5) and the distance meter (10).

2. The device for measuring the J value of oil casing according to claim 1, characterized in that: The controller adopts an HMI programmable controller, which is provided with a visual screen and an alarm device.

3. The device for measuring the J value of oil casing according to claim 1, characterized in that: The distance meter (10) is a laser distance meter.

4. The device for measuring the J value of oil casing according to claim 1, characterized in that: The limiting device (12) is made of nylon material or polytetrafluoroethylene material.

5. The device for measuring the J value of oil casing according to claim 1, characterized in that: The size of the diameter platform (14) is consistent with the radial size of the diameter gauge of the oil casing inspection tool.

6. The device for measuring the J value of oil casing according to claim 1, characterized in that: The worm gear screw lifting mechanism (2) and the dovetail groove cross slide (4) are provided with self-locking devices.

7. The device for measuring the J value of oil casing according to claim 1, characterized in that: The diameter of the limiting platform (13) is less than or equal to the outer diameter of the tube end of the tube body (16) and is greater than the inner diameter of the tube body (16).

8. The device for measuring the J value of oil casing according to claim 1, characterized in that: The movable plate (9) is circular, and its diameter is larger than the outer diameter of the coupling (17).

9. The device for measuring the J value of oil casing according to claim 1, characterized in that: The limiting device (12) has various sizes to meet the needs of oil casings with different specifications.

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