Blowout preventer main drift diameter radius detection device for oil and gas exploitation and use method

Abstract

The invention relates to the technical field of blowout preventer detection, in particular to a blowout preventer main drift diameter radius detection device for oil and gas exploitation and a using method, and the blowout preventer main drift diameter radius detection device for oil and gas exploitation comprises a left connecting flange and a right connecting flange which are arranged in a left-right spaced mode. The blowout preventer radius measuring device is reasonable and compact in structure and convenient to use, the blowout preventer radius measuring device is rapidly installed and fixed to the two ends of a blowout preventer through the left connecting flange and the right connecting flange, and the radius measuring disc is pushed, pulled and rotated in the axial direction and the circumferential direction of the positioning mandrel through the steering rod; the radius values of different positions of the main drift diameter of the blowout preventer in any direction can be continuously, rapidly and directly measured, the radius values are compared with the standard radius, the radius deviation of the main drift diameter of the blowout preventer can be obtained, and then the abrasion and thinning conditions of the inner wall of the main drift diameter of the blowout preventer can be rapidly determined.

Description

Technical Field

[0001] The invention relates to the technical field of blowout preventer detection, and relates to a blowout preventer main path radius detection device used for oil and gas production and a use method thereof. Background Art

[0002] In the construction of oil and gas drilling and well repair, in order to ensure the safety of drilling through high-pressure oil and gas layers and underground operations, and to avoid uncontrolled blowout accidents during drilling and well repair, it is necessary to install well control devices on the wellhead of the operating well. The most important and critical component of the well control device is the blowout preventer, and its quality and reliability play an important role in ensuring the smooth progress of drilling and well repair operations and personal safety. The blowout preventer can be reused many times, but it needs to be regularly inspected and maintained in accordance with standards and specifications.

[0003] At present, when detecting the main diameter radius of the blowout preventer, the main diameter is usually measured first and then converted into a radius, that is, a number of main diameter values ​​are measured using an internal diameter measuring instrument, and their arithmetic mean is calculated to obtain the arithmetic mean of the diameter. The arithmetic mean of the diameter is then divided by two to obtain an indirect measurement value of the radius. The indirect measurement value of the radius is compared with the theoretical value of the radius, and the difference between the two is considered to be the radius deviation.

[0004] Therefore, the existing method for measuring the radius of the main diameter of the blowout preventer has the following deficiencies in actual use: the radius measurement value is an indirect measurement value obtained by calculation, not a direct measurement value, and has a large error and cannot correctly judge the wear and thinning condition of the inner wall of the main diameter of the blowout preventer. Summary of the invention

[0005] The present invention provides a blowout preventer main path radius detection device and a method for using the same for oil and gas production, which overcomes the above-mentioned deficiencies in the prior art and can effectively solve the problem that the radius measurement value in the existing blowout preventer main path radius measurement process is an indirect measurement value obtained by calculation, not a direct measurement value, resulting in large errors and inability to correctly judge the wear and thinning condition of the inner wall of the blowout preventer main path radius.

[0006] One of the technical solutions of the present invention is achieved through the following measures: a blowout preventer main diameter radius detection device for oil and gas production, comprising a left connecting flange and a right connecting flange arranged at intervals on the left and right, a first connecting hole penetrating from left to right is provided in the middle of the left connecting flange, a second connecting hole penetrating from left to right is provided on the right connecting flange corresponding to the position of the first connecting hole, a positioning mandrel with a left portion located in the first connecting hole is provided in the second connecting hole, a radius measuring disk is slidably installed on the outer side of the positioning mandrel corresponding to the position between the left connecting flange and the right connecting flange, at least two measuring heads capable of measuring the main diameter radius of the blowout preventer in real time are evenly distributed on the radius measuring disk along the circumference, a left observation hole penetrating from left to right and in a semicircular shape is symmetrically provided on the left connecting flange at upper and lower intervals, and a steering rod with a left portion located in the left observation hole is provided on the radius measuring disk.

[0007] The following are further optimizations and / or improvements to the above technical solutions: The above-mentioned measuring head may include a compression spring, an L-shaped probe and a pressure cover. At least two mounting planes are evenly distributed on the outer circumference of the radius measuring disk. A spring hole opening outward is provided on the radius measuring disk corresponding to the middle position of each mounting plane. A compression spring and an L-shaped probe are arranged in sequence from the inside to the outside in each spring hole. A pressure cover with an inner end screwed together with the inner side of the outer end of the corresponding spring hole is installed on the outer side of each L-shaped probe. A radius indicating scale line is provided on the outer side of the L-shaped probe.

[0008] The outer end of the above-mentioned L-shaped probe can be hemispherical or conical with a small outer side and a large inner side.

[0009] The right connecting flange corresponding to each left observation hole position may be provided with a right observation hole that runs through from left to right and is semicircular. The steering rod may include a depth measuring rod, a left connecting rod and a right connecting rod. The radius measuring disk is symmetrically provided with steering holes that run through from left to right at upper and lower intervals. A depth measuring rod with its right part located in the right observation hole is fixedly installed in each steering hole. The left and right ends of the two depth measuring rods are respectively detachably installed with a left connecting rod and a right connecting rod. Depth indicating scale lines are provided on the outer sides of the two depth measuring rods corresponding to the left side of the radius measuring disk.

[0010] The above may also include nuts and self-lubricating sleeves. Nuts are threadedly connected to the outer sides of the left and right ends of the positioning mandrel. A self-lubricating sleeve is arranged between the radius measuring disk and the positioning mandrel.

[0011] A positioning ring platform may be provided on the right side of the left connecting flange and the left side of the right connecting flange.

[0012] The second technical solution of the present invention is achieved by the following measures: a method for using a blowout preventer main diameter radius detection device for oil and gas production, which is carried out according to the following method. In the first step, the left connecting flange and the right connecting flange are fixedly installed with the two ends of the blowout preventer by threaded fasteners to complete the installation of the present invention and the blowout preventer; in the second step, the left connecting rod is first pushed and pulled to make the radius measuring disk slide axially along the positioning core shaft to the inner side of either end of the blowout preventer, and then the left connecting rod is rotated to make the radius measuring disk rotate one circle along the circumference of the blowout preventer main diameter, and the radius indications of all measuring heads are read at multiple points, so as to complete the radius measurement of the blowout preventer main diameter at this position; in the third step, while rotating the radius measuring disk, the left connecting rod is gradually pushed and pulled to make the radius measuring disk move axially along the positioning core shaft, and the depth indication on the depth measuring rod and the radius indication of the measuring head are read at the same time, so as to continuously measure the values ​​of any radial direction at different positions of the blowout preventer main diameter, and the radius deviation can be obtained by comparing the above-mentioned radius measurement value with the standard radius value, and finally the defect position of the inner surface of the blowout preventer main diameter is located.

[0013] The invention has a reasonable and compact structure and is easy to use. The invention is quickly installed and fixed at both ends of a blowout preventer through a left connecting flange and a right connecting flange. The radius measuring disk is pushed and pulled and rotated along the axial and circumferential directions of a positioning core shaft by a steering rod, so that the radius values ​​of different positions of the main path of the blowout preventer in any direction can be continuously, quickly and directly measured. The radius deviation of the main path of the blowout preventer can be obtained by comparing and calculating the radius with the standard radius, and then the wear and thinning conditions of the inner wall of the main path of the blowout preventer can be quickly determined. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 It is a schematic diagram of the main view and partial cross-section structure of Example 1 of the present invention.

[0015] Attached Figure 2 For attachment Figure 1 Schematic diagram of the cross-sectional structure with the AA section enlarged.

[0016] Attached Figure 3 For attachment Figure 1 Schematic diagram of the three-dimensional structure.

[0017] The codes in the accompanying drawings are: 1 is the left connecting flange, 2 is the right connecting flange, 3 is the positioning mandrel, 4 is the radius measuring disk, 5 is the left observation hole, 6 is the L-shaped probe, 7 is the pressure cover, 8 is the compression spring, 9 is the installation plane, 10 is the spring hole, 11 is the radius indicating scale line, 12 is the right observation hole, 13 is the sounding rod, 14 is the left connecting rod, 15 is the right connecting rod, 16 is the depth indicating scale line, 17 is the nut, 18 is the positioning ring platform, 19 is the blowout preventer, 20 is the weight-reducing light-transmitting hole, and 21 is the bolt and nut. DETAILED DESCRIPTION

[0018] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0019] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0020] The present invention will be further described below in conjunction with embodiments and drawings: Embodiment 1: As attached Figure 1-3As shown, the main diameter radius detection device for a blowout preventer for oil and gas production comprises a left connecting flange 1 and a right connecting flange 2 which are arranged at intervals on the left and right. A first connecting hole which passes through the left and right is provided in the middle of the left connecting flange 1. A second connecting hole which passes through the left and right is provided on the right connecting flange 2 which corresponds to the position of the first connecting hole. A positioning mandrel 3 which is located at the left side in the first connecting hole is provided in the second connecting hole. A radius measuring disk 4 is slidably installed on the outer side of the positioning mandrel 3 which is located at a position between the left connecting flange 1 and the right connecting flange 2. At least two measuring heads which can measure the main diameter radius of the blowout preventer 19 in real time are evenly distributed on the radius measuring disk 4 along the circumference. A left observation hole 5 which passes through the left and right and is semicircular is symmetrically provided on the left connecting flange 1 at intervals on the upper and lower sides. A steering rod which is located at the left side in the left observation hole 5 is provided on the radius measuring disk 4.

[0021] When in use, in order to facilitate the rapid disassembly and assembly between the present invention and the blowout preventer 19, the connection holes on the left connection flange 1 and the right connection flange 2 match the connection holes on the blowout preventer 19. During use, the present invention can be quickly connected to the blowout preventer 19 by bolts and nuts 21. After installation, the axis of the positioning mandrel 3 coincides with the axis of the main diameter of the blowout preventer 19. The main diameter of the blowout preventer 19 can be measured from left to right along its axial direction by pushing the radius measuring disc 4 by the steering rod. During the movement of the radius measuring disc 4 to the left and right, the radius measuring disc 4 can also be rotated by the steering rod at the same time, thereby measuring the radius of the main diameter of the blowout preventer 19 along the circumferential direction.

[0022] According to the requirements, the measuring head can be a mechanical or digital internal diameter dial indicator or a lever dial indicator probe (such as Japan Mitutoyo 513-425-10E probe) or an inductive probe (such as TESA GT44 inductive probe) or infrared probe or spring pointer probe is implemented. In this embodiment, four measuring heads are arranged on the radius measuring disk 4, and two measuring heads opposite to each other in any direction are arranged along the diameter direction of the radius measuring disk 4. The radius data measured by the two can be compared with each other to judge the wear and thinning condition of the inner wall of the main diameter of the blowout preventer 19; in addition, in order to reduce the weight of the radius measuring disk 4 and enhance the light for observing the measured value, at least two weight-reducing light-transmitting holes 20 that penetrate left and right can be evenly distributed along the circumference of the radius measuring disk 4; in order to increase the size of the left observation hole 5 as much as possible, the arc-shaped part of the semicircular left observation hole 5 on the upper part of the left connecting flange 1 is convex upward, and the arc-shaped part of the semicircular left observation hole 5 on the lower part is concave downward; in this embodiment, in order to facilitate the rapid disassembly and assembly of the positioning mandrel 3, the outer sides of the left and right ends of the positioning mandrel 3 can be screwed with nuts 17, and the right end can also be interference connected or screwed or riveted with the second connecting hole on the right connecting flange 2, and the outer side of the left end is screwed with the nut 17.

[0023] The present invention has a reasonable and compact structure and is easy to use. The present invention is quickly installed and fixed at both ends of a blowout preventer 19 through a left connecting flange 1 and a right connecting flange 2. The radius measuring disk 4 is pushed and pulled along the axial and circumferential directions of a positioning mandrel 3 by a steering rod, so that the radius values ​​of different positions of the main path of the blowout preventer 19 in any direction can be directly and continuously measured. The radius deviation of the main path of the blowout preventer 19 can be obtained by comparing and calculating the radius with the standard radius, thereby quickly determining the wear and thinning conditions of the inner wall of the main path of the blowout preventer 19.

[0024] According to actual needs, the above-mentioned blowout preventer main diameter radius detection device for oil and gas production can be further optimized and / or improved: Embodiment 2: As attached Figure 1-3 As shown, the measuring head includes a compression spring 8, a L-shaped probe 6 and a pressure cover 7. At least two mounting planes 9 are evenly distributed on the outer circumference of the radius measuring disk 4. A spring hole 10 opening outward is provided on the radius measuring disk 4 corresponding to the middle position of each mounting plane 9. A compression spring 8 and a L-shaped probe 6 are sequentially provided in each spring hole 10 from the inside to the outside. A pressure cover 7 whose inner end is screwed together with the inner side of the outer end of the corresponding spring hole 10 is mounted on the outer side of each L-shaped probe 6. A radius indicating scale line 11 is provided on the outer side of the L-shaped probe 6.

[0025] Through such an arrangement, the overall structure of the measuring head is simple, the reliability is high, the cost is low, the replacement speed is fast, and the interchangeability of parts is good; during use, the radius measurement value can be directly observed and read through the left observation hole 5, and during use, an additional light source can be added to increase the light intensity at the measuring head position so that the scale on the L-shaped probe 6 can be clearly read; the pressure cover 7 is used to prevent the L-shaped probe 6 and the compression spring 8 from popping out and falling off from the spring hole 10.

[0026] Embodiment 3: As attached Figure 1-3 As shown, the outer end of the L-shaped probe 6 is hemispherical or conical with a small outer side and a large inner side.

[0027] By such arrangement, during the rotation of the radius measuring disc 4, the U-shaped probe 6 with a hemispherical outer end or a conical shape with a small outer portion and a large inner portion can slide more smoothly against the inner wall of the main path of the blowout preventer 19, thereby reducing the sticking and wear of the U-shaped probe 6.

[0028] Embodiment 4: As attached Figure 1 , 3As shown, a right observation hole 12 which is through from left to right and is semicircular is provided on the right connecting flange 2 corresponding to the position of each left observation hole 5, the steering rod comprises a sounding rod 13, a left connecting rod 14 and a right connecting rod 15, and the radius measuring disk 4 is symmetrically provided with steering holes which are through from left to right at intervals from top to bottom, and a sounding rod 13 with the right portion located in the right observation hole 12 is fixedly installed in each steering hole, and the left and right ends of the two sounding rods 13 are detachably installed with the left connecting rod 14 and the right connecting rod 15 respectively, and the outer sides of the two sounding rods 13 corresponding to the left side of the radius measuring disk 4 are provided with depth indicating scale lines 16.

[0029] By such arrangement, the left connecting rod 14 and the right connecting rod 15 are more convenient for adjusting the position of the radius measuring disc 4 in the main diameter of the blowout preventer 19 and the radial position of each measuring head, and the sounding rod 13 with the depth indicating scale line 16 is more convenient for quickly and directly determining the depth position of the radius measuring disc 4 and the measuring head, and the right observation hole 12 can make the light better and more convenient to read the scale value on the measuring head; the two sounding rods 13 and the left connecting rod 14 and the right connecting rod 15 can be detachably installed by nuts, by shaft rings and cotter pins, and by anti-drop bolts installed along the axial direction.

[0030] Embodiment 5: As attached Figure 1 , 3 As shown, it also includes a nut 17 and a self-lubricating sleeve. The nuts 17 are threadedly connected to the outer sides of the left and right ends of the positioning core shaft 3, and a self-lubricating sleeve is provided between the radius measuring disk 4 and the positioning core shaft 3.

[0031] During use, the nut 17 and the flat spring washer can be used to quickly disassemble and assemble the positioning core shaft 3 and the left connecting flange 1 and the right connecting flange 2, thereby improving the efficiency of the radius measurement operation and saving operation time; the self-lubricating sleeve can make the radius measuring disk 4 slide and rotate on the positioning core shaft 3 more smoothly and with less effort, and the self-lubricating sleeve can be a graphite self-lubricating sleeve, a plastic self-lubricating sleeve, or a composite material self-lubricating sleeve in the existing known technology.

[0032] Embodiment 6: As attached Figure 1 , 3 As shown, a positioning ring 18 is provided on the right side of the left connecting flange 1 and the left side of the right connecting flange 2.

[0033] During use, after the positioning ring 18 is inserted into the positioning groove or sealing groove on the blowout preventer 19, the coincidence accuracy between the axis of the radius measuring disc 4 and the axis of the blowout preventer 19 can be improved, the radius measurement accuracy can be improved, and the measurement error can be reduced.

[0034] Embodiment 7: As attached Figure 1-3As shown, the method for using the main diameter radius detection device for oil and gas production of the blowout preventer is carried out according to the following method. In the first step, the left connecting flange 1 and the right connecting flange 2 are fixedly installed with the two ends of the blowout preventer 19 by threaded fasteners to complete the installation of the present invention and the blowout preventer 19; in the second step, the left connecting rod 14 is pushed and pulled to make the radius measuring disc 4 slide axially along the positioning core shaft 3 to the inner side of either end of the blowout preventer 19, and then the left connecting rod 14 is rotated to make the radius measuring disc 4 rotate one circle along the main diameter of the blowout preventer 19, and the measured values ​​are read at multiple points. With the radius indication of the measuring head, the radius measurement of the main diameter of the blowout preventer 19 at this position can be completed; the third step is to gradually push and pull the left connecting rod 14 while rotating the radius measuring disk 4 to make the radius measuring disk 4 move axially along the positioning core shaft 3, read the depth indication on the sounding rod 13 and the radius indication of the measuring head, and continuously measure the values ​​of any radial direction of the main diameter of the blowout preventer 19 at different positions, compare the above-mentioned radius measurement value with the standard radius value to calculate and obtain the radius deviation, and finally locate the defect position of the inner surface of the main diameter of the blowout preventer 19.

[0035] The above-mentioned measuring method can continuously, quickly and directly measure the radius values ​​of different positions of the main path of the blowout preventer 19 in any direction. By comparing and calculating these radius values ​​with the standard radius values, the wear position of the inner wall of the main path of the blowout preventer 19 can be quickly located and the thinning situation can be judged at the same time, thereby avoiding the measurement error caused by converting the diameter measurement into the radius value and improving the accuracy of locating the wear position.

[0036] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A blowout preventer main diameter radius detection device for oil and gas production, characterized in that It comprises a left connecting flange and a right connecting flange which are arranged at intervals on the left and right. A first connecting hole which penetrates the left and right sides is arranged in the middle of the left connecting flange. A second connecting hole which penetrates the left and right sides is arranged on the right connecting flange corresponding to the position of the first connecting hole. A positioning mandrel with the left portion located in the first connecting hole is arranged in the second connecting hole. A radius measuring disk is slidably installed on the outer side of the positioning mandrel corresponding to the position between the left connecting flange and the right connecting flange. At least two measuring heads which can measure the main diameter radius of the blowout preventer in real time are evenly distributed on the radius measuring disk along the circumference. A left observation hole which penetrates the left and right sides and is semicircular is symmetrically arranged at intervals on the upper and lower sides of the left connecting flange. A steering rod with the left portion located in the left observation hole is arranged on the radius measuring disk.

2. The main diameter radius detection device for a blowout preventer for oil and gas production according to claim 1 is characterized in that The measuring head includes a compression spring, an L-shaped probe and a pressure cover. At least two mounting planes are evenly distributed on the outer circumference of the radius measuring disk. A spring hole opening outward is provided on the radius measuring disk corresponding to the middle position of each mounting plane. A compression spring and an L-shaped probe are arranged in sequence from the inside to the outside in each spring hole. A pressure cover with an inner end screwed together with the inner side of the outer end of the corresponding spring hole is mounted on the outside of each L-shaped probe. A radius indicating scale line is provided on the outside of the L-shaped probe.

3. The main diameter radius detection device for a blowout preventer for oil and gas production according to claim 2 is characterized in that The outer end of the L-shaped probe is hemispherical or conical with a small outside and a large inside.

4. The main diameter radius detection device for a blowout preventer for oil and gas production according to claim 1, 2 or 3, characterized in that A right observation hole which is through from left to right and is semicircular is provided on the right connecting flange corresponding to each left observation hole position. The steering rod comprises a sounding rod, a left connecting rod and a right connecting rod. The radius measuring disk is symmetrically provided with steering holes which are through from left to right at upper and lower intervals. A sounding rod with the right part located in the right observation hole is fixedly installed in each steering hole. The left and right ends of the two sounding rods are detachably installed with a left connecting rod and a right connecting rod respectively. Depth indicating scale lines are provided on the outer sides of the two sounding rods corresponding to the left side of the radius measuring disk.

5. The main diameter radius detection device for a blowout preventer for oil and gas production according to claim 1, 2 or 3, characterized in that It also includes nuts and self-lubricating sleeves. The outer sides of the left end and the right end of the positioning mandrel are both screwed with nuts. A self-lubricating sleeve is arranged between the radius measuring disk and the positioning mandrel.

6. The main diameter radius detection device for a blowout preventer for oil and gas production according to claim 4 is characterized in that It also includes nuts and self-lubricating sleeves. The outer sides of the left end and the right end of the positioning mandrel are both screwed with nuts. A self-lubricating sleeve is arranged between the radius measuring disk and the positioning mandrel.

7. The main diameter radius detection device for a blowout preventer for oil and gas production according to claim 1, 2, 3 or 6, characterized in that Positioning ring platforms are provided on the right side of the left connecting flange and on the left side of the right connecting flange.

8. The main diameter radius detection device for a blowout preventer for oil and gas production according to claim 4 is characterized in that Positioning ring platforms are provided on the right side of the left connecting flange and on the left side of the right connecting flange.

9. The main diameter radius detection device for a blowout preventer for oil and gas production according to claim 5, characterized in that Positioning ring platforms are provided on the right side of the left connecting flange and on the left side of the right connecting flange.

10. A method for using the blowout preventer main diameter radius detection device for oil and gas production according to any one of claims 4 to 9, characterized in that The method is as follows: first, the left connecting flange and the right connecting flange are fixedly installed with the two ends of the blowout preventer by threaded fasteners, so as to complete the installation of the present invention and the blowout preventer; second, the left connecting rod is pushed and pulled to make the radius measuring disk slide axially along the positioning core shaft to the inner side of either end of the blowout preventer, and then the left connecting rod is rotated to make the radius measuring disk rotate one circle along the circumference of the main diameter of the blowout preventer, and the radius indications of all measuring heads are read at multiple points, so as to complete the radius measurement of the main diameter of the blowout preventer at this position; third, while rotating the radius measuring disk, the left connecting rod is gradually pushed and pulled to make the radius measuring disk move axially along the positioning core shaft, and the depth indication on the sounding rod and the radius indication of the measuring head are read at the same time, so as to continuously measure the values ​​of any radial direction at different positions of the main diameter of the blowout preventer, and the radius deviation can be obtained by comparing the above-mentioned radius measurement value with the standard radius value, and finally the defect position of the inner surface of the main diameter of the blowout preventer is located.

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