A ground well pin joint wear gauge and testing method

Abstract

The present application discloses a kind of ground well bolt joint wear gauge and test method, for detecting ground well bolt joint wear degree, ground well bolt joint contact oiling pipe head contact annular surface includes clamping contact surface and bolt head contact surface, including the annular gauge body placed on the annular surface of ground well bolt joint contact oiling pipe head contact, and a plurality of measuring rods are arranged on the gauge body with equal central angle spacing;The measuring rod is movably connected with the gauge body, and the measuring rod is limited to linear reciprocating motion relative to the gauge body;Measuring rod one end is the contact end of contact bolt head contact surface, the other end is the indicating end, the clearance between the contact end and the gauge body is less than the clearance between the gauge body and the bolt head contact surface when the contact end is in initial position;The gauge body has identification for calibrating the relative displacement of indicating end and gauge body, and the wear degree is reacted by the obtained relative displacement.

Description

Technical Field

[0001] This invention belongs to the field of maintenance measuring tool technology, specifically relating to a well bolt joint wear measuring tool and testing method. Background Technology

[0002] In the field of aviation ground support, aviation sump refueling is one of the core facilities for providing fuel replenishment to aircraft. Connected to the fuel storage system via underground pipelines, it enables rapid and efficient refueling operations. During refueling, the sump plug connector is a crucial component for establishing the fuel supply path. During refueling, the refueling hose head must be precisely aligned with the sump plug connector. The clamps on the connector engage and tighten the corresponding structure of the hose head, ensuring a tight seal between the hose head and the connector's contact surface. This creates a sealed fuel delivery channel, ensuring a stable fuel supply to the aircraft.

[0003] The contact annular surface of the wellbore plug connector includes a clamping contact surface and a plug head contact surface. The clamping contact surface is mainly used to cooperate with the grippers to fix the refueling hose head, while the plug head contact surface directly contacts the corresponding end face of the refueling hose head to form a seal. Due to the frequent refueling needs of aircraft, the wellbore plug connector needs to be repeatedly docked and disconnected from the refueling hose head. After long-term use, the plug head contact surface will wear down due to continuous friction and compression. If the plug head contact surface wears excessively, it will lead to a decrease in the sealing performance between the refueling hose head and the wellbore plug connector, which may result in the risk of fuel leakage. It may also affect the connection stability of the two and interfere with normal refueling operations.

[0004] Currently, the methods for detecting the wear of wellbore bolt joints are relatively traditional, relying almost entirely on manual inspection. Inspectors must use simple measuring tools such as rulers and calipers to measure different points on the bolt head contact surface, comparing the measured data with standard dimensions to determine the wear condition. This method has significant drawbacks. Firstly, the bolt head contact surface is a ring structure, and point-by-point measurement is extremely time-consuming, resulting in very low inspection efficiency and failing to meet the inspection requirements of high-frequency support operations for aerial wells. Secondly, the accuracy of manual measurement is highly dependent on the operator's experience, and problems such as improper selection of measurement locations and reading errors can easily lead to missed detections or misjudgments, failing to comprehensively and reliably reflect the actual wear condition of the wellbore bolt joint. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a wear measuring tool and testing method for well plug joints. By designing a ring structure and several movable measuring rods, it can achieve rapid wear detection by utilizing the structural characteristics of the well plug joint itself, which is efficient, convenient, and does not rely on experience.

[0006] The technical solution adopted in this invention is as follows:

[0007] In conjunction with the first aspect, the present invention provides a wellbore plug joint wear measuring tool for detecting the wear degree of the wellbore plug joint. The annular surface of the wellbore plug joint contacting the oil filling pipe head includes a clamping contact surface and a plug head contact surface. The tool body includes an annular measuring tool body placed on the annular surface of the wellbore plug joint contacting the oil filling pipe head, and a plurality of measuring rods arranged on the measuring tool body at equal central angle intervals.

[0008] The measuring rod is movably connected to the measuring instrument body and the measuring rod is subject to restricted linear reciprocating motion relative to the measuring instrument body;

[0009] One end of the measuring rod is the contact end of the contact pin contact surface, and the other end is the indicating end. When the contact end is in the initial position, the gap between it and the measuring instrument body is smaller than the gap between the measuring instrument body and the contact pin contact surface.

[0010] The measuring instrument body has markings for calibrating the relative displacement between the indicating end and the measuring instrument body. The degree of wear is reflected by the obtained relative displacement.

[0011] In conjunction with the first aspect, the present invention provides a first embodiment of the first aspect, wherein the measuring instrument body is provided with a plurality of fixing holes, and the marking is disposed on the end face of the hole through which the indicating end passes;

[0012] The measuring rod is elastically confined within the fixing hole, and the end of the measuring rod that falls from the measuring instrument body toward the end face of the contact annular surface of the well plug connector and the refueling pipe head is the contact end.

[0013] In conjunction with the first embodiment of the first aspect, the present invention provides a second embodiment of the first aspect, wherein a spring cylinder is embedded in the fixing hole, and the measuring rod passes through the spring cylinder and is elastically limited by the spring cylinder;

[0014] The spring cylinder provides an elastic force that keeps the contact end of the measuring rod moving outward, and the indicating end moves outward from the fixed hole to indicate the direction of movement against the elastic force of the spring cylinder.

[0015] In conjunction with the second embodiment of the first aspect, the present invention provides a third embodiment of the first aspect, wherein the spring cylinder is provided with flexible and deformable clips on both end faces, and when the spring cylinder is inserted into the fixing hole, the clips on both end faces bend and deform into the fixing hole, causing the spring cylinder to engage and limit the fixing hole.

[0016] In conjunction with the second embodiment of the first aspect, the present invention provides a fourth embodiment of the first aspect, wherein the spring cylinder has a metal spring piece that is elastically limited by the spring cylinder. During the process of the measuring rod contacting the well plug joint, contacting the refueling pipe head, and contacting the annular surface and being compressed and rebounding, when the indicating end of the measuring rod passes through the fixing hole, the metal spring piece is displaced by force and impacts the spring cylinder to produce a popping sound. When the indicating end of the measuring rod retracts into the fixing hole, the metal spring piece resets and impacts the spring cylinder again to produce a popping sound.

[0017] In conjunction with the second embodiment of the first aspect, the present invention provides a fifth embodiment of the first aspect, wherein a sliding ring is rotatably connected to the outer side of the measuring instrument body, and when the measuring instrument body is placed on the contact annular surface of the well plug connector contacting the oil filling pipe head, the sliding ring is clamped and limited by the jaws of the well plug connector, thus maintaining the degree of freedom of rotation of the measuring instrument body relative to the well plug connector.

[0018] In conjunction with several embodiments of the first aspect, the present invention provides a sixth embodiment of the first aspect, wherein the fixing hole is an oblong hole, the spring cylinder is rotatably connected to the fixing hole via a rotating shaft, the rotating shaft is perpendicular to any radius line of the measuring instrument body, and the spring cylinder drives the measuring rod to rotate when it rotates relative to the fixing hole;

[0019] Several slots are provided on the inner wall of the fixing hole along the rotation trajectory of the spring cylinder, and the spring cylinder is provided with protrusions that cooperate with the slots for limiting movement.

[0020] Secondly, the present invention provides a testing method using the aforementioned wellbore bolt joint wear gauge, specifically as follows:

[0021] The measuring instrument body is installed on the well plug connector and attached to the clamping contact surface. Then, the jaws of the well plug connector are controlled to fix the measuring instrument body on the clamping contact surface. After fixing, the measuring instrument body and the plug head contact surface have a measuring gap. The measuring rod contacts the plug head contact surface in the measuring gap and rebounds. After the measuring rod rebounds to its original position, the wear amount is determined by referring to the relative position relationship with the mark.

[0022] Thirdly, the present invention provides a testing method using the well plug joint wear measuring tool described in any of the above-mentioned claims, specifically as follows:

[0023] The measuring instrument body is installed on the well plug connector and attached to the clamping contact surface. Then, the action of the jaws of the well plug connector is controlled to restrict the measuring instrument body on the clamping contact surface. After fixing, the measuring instrument body and the plug head contact surface have a measurement gap, and there is a sliding gap between the jaws, the measuring instrument body and the clamping contact surface.

[0024] The measuring rod contacts the contact surface of the bolt head in the measuring gap and rebounds. After the measuring rod rebounds to its original position, touch the port of the fixing hole facing outward by hand, and then rotate the measuring instrument body. If the indicator end of the measuring rod is touched but does not protrude out of the fixing hole, it is confirmed that the wear degree is greater than the specified value and does not meet the standard. If all measuring rods remain protruding out of the fixing hole after rotating the measuring instrument body for at least one revolution, it is determined that the wear degree meets the standard.

[0025] Fourthly, the present invention also provides a testing method using the aforementioned wellbore bolt joint wear gauge, specifically as follows:

[0026] Install the measuring instrument body on the well plug connector and fit it against the clamping contact surface. Then adjust the position of the slot corresponding to the spring cylinder in the fixing hole so that all the spring cylinders on the entire measuring instrument body are in different slot positions.

[0027] The clamping action of the well plug connector is controlled to restrict the measuring instrument body on the clamping contact surface, and the fixed measuring instrument body and the plug head contact surface have a measurement gap;

[0028] If, under static conditions, there are measuring rods that do not extend beyond the fixing holes, it is determined that the wear at the contact surface of the corresponding pin is excessive. If the indicating ends of all measuring rods extend beyond the fixing holes, rotate the measuring instrument body at least one revolution and check in real time. If there are measuring rods that do not extend beyond the fixing holes or if the rotational resistance of the measuring instrument body increases beyond the threshold, stop rotating and check the condition of each measuring rod to determine the location of excessive wear. If, after the measuring instrument body rotates one revolution, all measuring rods always extend beyond the fixing holes and the rotational resistance does not increase to the threshold, it is determined that the wear meets the standard.

[0029] The beneficial effects of this invention are as follows:

[0030] (1) By setting an annular measuring tool body that is compatible with the contact annular surface of the well plug joint, and arranging several measuring rods on the measuring tool body at equal central angle intervals, the present invention can achieve full coverage detection of the plug head contact surface, avoid the detection blind spots that are easy to occur when measuring point by point manually in the traditional way, effectively improve the comprehensiveness and reliability of wear detection, and ensure that every wear on the plug head contact surface can be captured.

[0031] (2) By designing the measuring rod and the measuring instrument body as a restricted linear reciprocating structure with movable connection, and setting a mark on the measuring instrument body for calibrating the displacement, the measuring rod can convert the wear amount into an intuitive indication end displacement through the rebound action after contacting the contact surface of the bolt head. This eliminates the need for the testing personnel to use complex measuring tools to calculate the readings, greatly reducing the difficulty of the testing operation. Even non-professionals can quickly master the testing method, improving the convenience of the testing operation.

[0032] (3) The present invention uses a spring cylinder to elastically limit the measuring rod, so that the measuring rod can automatically contact the bolt head contact surface and complete the rebound during the detection process. There is no need to manually adjust the position of the measuring rod. At the same time, with the feedback of the metal spring, the detection personnel can quickly confirm whether the measuring rod has rebounded into place, further reducing the manual operation steps, significantly shortening the time of a single detection, effectively improving the overall efficiency of well bolt joint wear detection, and better meeting the needs of high-frequency support operations of aviation wells.

[0033] (4) By designing a rotatable measuring instrument body and a spring cylinder structure with an adjustable angle via a slot, the present invention enables dynamic detection of the contact surface of the bolt head by rotating the measuring instrument body during the detection process. At the same time, the contact angle of the measuring rod can be adjusted according to the actual detection needs. It is suitable for quickly screening whether the wear meets the standard, and can also accurately locate the specific location of excessive wear, which greatly improves the flexibility and applicability of the detection method and can meet the wear detection needs of well bolt joints in different scenarios. Attached Figure Description

[0034] Figure 1 This is an isometric view of the first wear gauge placed at the well plug joint in this embodiment of the invention;

[0035] Figure 2 This is an isometric view of the first wear gauge in this embodiment of the invention when it is clamped at the well plug joint;

[0036] Figure 3 This is an isometric view of the first type of wear gauge separated from the well plug connector in this embodiment of the invention;

[0037] Figure 4 This is a cross-sectional isometric view of the first wear gauge placed at the well plug joint in this embodiment of the invention;

[0038] Figure 5 This is the present invention. Figure 4 A magnified view of part A in the diagram.

[0039] In the diagram: 1-Measuring instrument body, 2-Well plug connector, 3-Clamping jaw, 4-Spring cylinder, 5-Measuring rod, 6-Clamping contact surface, 7-Plug head contact surface, 8-Sliding ring, 9-Fixing hole, 10-Clamp. Detailed Implementation

[0040] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0043] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0044] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0045] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0046] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] Example 1:

[0048] This embodiment discloses a well bolt joint wear measuring tool and corresponding testing method. (Refer to...) Figure 3 As shown in the figure, the end of the well plug connector 2 is used for docking with the aviation refueling connector. The contact surface mainly includes...

[0049] The wear gauge includes a ring-shaped gauge body 1, which is a ring-shaped disc structure made of metal material and has a certain thickness.

[0050] An annular bevel is machined on the outer edge of an annular end face of the measuring tool body 1. This bevel is adapted to the clamp 3 on the well plug connector 2 to achieve the positioning and fixing of the measuring tool body 1.

[0051] A plurality of measuring rods 5 are arranged at equal central angle intervals along the circumferential direction on the measuring instrument body 1. In this embodiment, four measuring rods 5 are preferably arranged, and the central angle between adjacent measuring rods 5 is 90 degrees. The measuring rods 5 are movably connected to the measuring instrument body 1, and the measuring rods 5 can perform restricted linear reciprocating motion relative to the measuring instrument body 1. One end of the measuring rod 5 is a contact end, and the other end is an indicating end. The contact end is used to contact the bolt head contact surface 7 of the well bolt connector 2, and the indicating end is used to display the amount of wear.

[0052] It should be noted that the contact end of the measuring rod 5 is designed as a cylindrical structure with a sharp annular edge. This structural design allows the measuring rod 5 to better sense the undulations of the contact surface 7 when it contacts the pin head. When the pin head contact surface 7 has significant wear forming pits, the sharp edge of the measuring rod 5 will generate a large tangential force when it contacts these pits, resulting in increased resistance when the measuring instrument body 1 rotates.

[0053] The measuring instrument body 1 is provided with a mark for calibrating the displacement of the measuring rod 5. This mark can be a scale line or other form of mark, and is set at the position corresponding to the indicating end of the measuring rod 5.

[0054] The corresponding testing method is as follows:

[0055] The measuring instrument body 1 is installed upside down on the well plug connector 2, so that the measuring instrument body 1 fits against the clamping contact surface 6 of the well plug connector 2. Since the well plug connector 2 is placed horizontally, the measuring rod 5 falls automatically under the action of gravity, and the contact end contacts the plug head contact surface 7.

[0056] The jaws 3 of the control well plug connector 2 are moved to clamp the annular inclined surface of the measuring instrument body 1, fixing the measuring instrument body 1 onto the clamping contact surface 6. After fixing, a measuring gap is formed between the measuring instrument body 1 and the plug head contact surface 7, and the measuring rod 5 contacts the plug head contact surface 7 in the measuring gap and remains fixed.

[0057] Under normal conditions, the measuring rod 5 has a certain stroke relative to the measuring instrument body 1, and its length protruding from the measuring instrument body 1 is greater than the measuring gap. Therefore, when the measuring instrument body 1 is inverted on the surface of the well plug connector 2, all the measuring rods 5 will move against each other, thereby generating a displacement to indicate the wear degree of the plug head contact surface 7.

[0058] The inspector directly reads the wear value by observing the position of the indicator end of the measuring rod 5 corresponding to the mark on the measuring tool body 1. In order to achieve a comprehensive inspection of the entire plug head contact surface 7, the inspector can manually rotate the measuring tool body 1. Due to the certain sliding clearance between the jaw 3 and the measuring tool body 1, the measuring tool body 1 can rotate relative to the well plug connector 2.

[0059] During rotation, if the contact surface 7 of the probe head has significant wear-induced pits, the sharp edge of the measuring rod 5 will experience a noticeable change in resistance when contacting these pits. Inspectors can judge the severity of wear by sensing changes in rotational resistance. A sudden increase in rotational resistance indicates that the measuring rod 5 has encountered significant wear pits, requiring detailed inspection at that location.

[0060] To facilitate rotation, a pull rope or other auxiliary rotation structure can be installed on the measuring instrument body 1, allowing inspectors to more easily rotate the measuring instrument body 1 for all-round inspection.

[0061] It should be noted that the wear surface of the well plug connector 2 is generally the plug head contact surface 7. Since the well plug connector 2 is impacted during refueling, the wear on the plug head contact surface 7 is usually a dent or pit. Therefore, if there is no wear or minimal wear, and the displacement of the measuring rod 5 contacting the plug head contact surface 7 is large, it has not reached the wear range indicated by the marking. However, if the rod 5 moves to a larger dent or wear area, the displacement will be smaller, and this will be considered as reaching the replacement and maintenance standard.

[0062] Example 2

[0063] This embodiment discloses a wear gauge for well bolt joints with an elastic telescopic rod structure and a corresponding testing method.

[0064] Reference Figures 1 to 3 The wellbore bolt joint wear gauge includes an annular gauge body 1, on which a plurality of fixing holes 9 are provided at equal central angle intervals along the circumferential direction. In this embodiment, four fixing holes 9 are preferably provided, and the central angle between adjacent fixing holes 9 is 90 degrees.

[0065] Each fixing hole 9 is fitted with a spring cylinder 4, which is a through-tube cylindrical structure. A measuring rod 5 passes through the spring cylinder 4 and can perform linear reciprocating motion within the spring cylinder 4. A spring is provided inside the spring cylinder 4, which provides an elastic force to the contact end of the measuring rod 5 to always move outward.

[0066] The spring cylinder 4 has bendable clips 10 on both end faces. The clips 10 are arranged in a petal shape and are deformable structures formed by cutting and bending the thin sheet structure of the outer wall of the metal spring cylinder 4. (Refer to...) Figure 5 When the spring cylinder 4 is inserted into the fixing hole 9, the clips 10 on both ends bend and deform into the fixing hole 9, forming a snap-fit ​​limit with the inner wall of the fixing hole 9, thereby firmly fixing the spring cylinder 4 in the fixing hole 9.

[0067] One end of the measuring rod 5 is the contact end, extending from the end face of the measuring instrument body 1 toward the well plug connector 2, and is used to contact the plug head contact surface 7. The other end of the measuring rod 5 is the indicating end, extending from the other end of the fixing hole 9. When the wear of the plug head contact surface 7 is minor, the measuring rod 5 extends outward under the action of the spring, and the indicating end passes through the fixing hole 9; when the wear of the plug head contact surface 7 is significant, the measuring rod 5 is compressed, and the indicating end retracts into the fixing hole 9.

[0068] The corresponding testing method is as follows:

[0069] The measuring instrument body 1 is installed on the well plug connector 2, so that the measuring instrument body 1 fits against the clamping contact surface 6 of the well plug connector 2. The jaws 3 of the well plug connector 2 are controlled to move, restricting the measuring instrument body 1 on the clamping contact surface 6, and a measuring gap is formed between the fixed measuring instrument body 1 and the plug head contact surface 7.

[0070] The measuring rod 5 extends towards the contact surface 7 of the bolt head under the action of the spring, and the contact end contacts the contact surface 7 of the bolt head and rebounds under pressure. After the measuring rod 5 rebounds to its original position, the inspector touches the port of the fixing hole 9 facing outwards with his hand.

[0071] If the indicating end of the measuring rod 5 can be touched and extended, it indicates that the wear of the contact surface 7 of the bolt head at that position is minor and within the allowable range; if the indicating end of the measuring rod 5 cannot be touched, it indicates that the wear of the contact surface 7 of the bolt head at that position is significant and exceeds the specified value. In this embodiment, the length design of the measuring rod 5 and the length design of the fixing hole 9 allow the indicating end of the measuring rod 5 to spring back and extend out of the fixing hole 9, indicating that the wear level meets the standard; if it does not extend, it indicates that the wear level does not meet the standard and requires rework.

[0072] To achieve a complete inspection of the entire plug head contact surface 7, the inspector needs to rotate the measuring instrument body 1 at least one revolution. Due to the sliding clearance between the jaws 3, the measuring instrument body 1, and the clamping contact surface 6, the measuring instrument body 1 can rotate relative to the well plug connector 2.

[0073] During the rotation, the inspector continuously touches the indicator end of the measuring rod 5 at each fixing hole 9. If the indicator ends of all measuring rods 5 remain protruding from the fixing holes 9 after one rotation, the wear level of the well plug connector 2 is deemed to meet the standard; if any measuring rod 5 is found to have an indicator end that does not protrude from the fixing hole 9 during the rotation, the wear level is confirmed to be greater than the specified value, and the well plug connector 2 does not meet the standard.

[0074] Example 3

[0075] This embodiment discloses a wear gauge for well bolt joints with a sliding ring structure and a corresponding testing method.

[0076] Reference Figure 4 and Figure 5The wellbore bolt joint wear gauge includes an annular gauge body 1, with a sliding ring 8 rotatably connected to the outer side of the gauge body 1. The sliding ring 8 and the gauge body 1 are rotatably connected through a dovetail groove structure. This structure ensures a stable connection between the sliding ring 8 and the gauge body 1 while allowing relative rotation between the two.

[0077] The sliding ring 8 is made of wear-resistant hard polymer material, which has good wear resistance and low coefficient of friction, ensuring that the measuring instrument body 1 can rotate smoothly during the inspection process.

[0078] The measuring instrument body 1 has several fixing holes 9 spaced at equal central angles along the circumference. Each fixing hole 9 contains a spring cylinder 4, and a measuring rod 5 passes through the spring cylinder 4. Flexible clips 10 are provided on both ends of the spring cylinder 4, which securely connect the spring cylinder 4 to the fixing holes 9.

[0079] The corresponding testing method is as follows:

[0080] Install the measuring instrument body 1 onto the well plug connector 2, so that the measuring instrument body 1 fits against the clamping contact surface 6 of the well plug connector 2. At this time, the jaws 3 of the well plug connector 2 clamp the sliding ring 8, restricting the entire measuring instrument onto the well plug connector 2.

[0081] Because the sliding ring 8 and the measuring instrument body 1 are connected by a dovetail joint structure, even after the clamping jaws 3 hold the sliding ring 8, the measuring instrument body 1 still maintains the freedom of rotation relative to the well plug connector 2. This design allows the inspector to easily rotate the measuring instrument body 1 for all-around inspection while the measuring instrument is fixed.

[0082] The measuring rod 5 extends towards the contact surface 7 of the bolt head under the action of the spring inside the spring sleeve 4. The contact end contacts the contact surface 7 of the bolt head and rebounds under pressure. After the measuring rod 5 rebounds to its original position, the inspector touches the port facing outward of the fixing hole 9 with his hand to check whether the indicating end of the measuring rod 5 has protruded.

[0083] Then, the inspector rotates the measuring instrument body 1. Because the sliding ring 8 is made of wear-resistant material and has a low coefficient of friction with the measuring instrument body 1, the measuring instrument body 1 can rotate smoothly. During the rotation, the inspector continuously touches the indicator ends of each measuring rod 5 to check for any parts that are not protruding.

[0084] If, after rotating the measuring instrument body 1 at least once, the indicating ends of all measuring rods 5 remain protruding from the fixing holes 9, then the wear level of the well plug connector 2 is deemed to be within acceptable limits; if it is found that the indicating end of any measuring rod 5 does not protrude from the fixing holes 9, then the wear level is confirmed to be excessive.

[0085] Example 4

[0086] This embodiment discloses a wear gauge for well bolt joints with angle adjustment function and a corresponding testing method.

[0087] The wellbore bolt joint wear gauge includes an annular gauge body 1, on which a plurality of fixing holes 9 are provided at equal central angle intervals along the circumference. In this embodiment, four fixing holes 9 are preferably provided, and the central angle between adjacent fixing holes 9 is 90 degrees.

[0088] The fixing holes 9 are designed as oblong holes, and each fixing hole 9 is connected to a spring cylinder 4 via a rotating shaft. The rotating shaft is perpendicular to any radius line of the measuring instrument body 1, and the spring cylinder 4 can rotate relative to the fixing hole 9 around the rotating shaft.

[0089] On the inner wall of the fixing hole 9, several slots are provided along the rotation trajectory of the spring cylinder 4. In this embodiment, four slots are preferably provided, each corresponding to a different angular position. The spring cylinder 4 is provided with protrusions that cooperate with the slots. By cooperating with the protrusions and different slots, the spring cylinder 4 can be fixed at different angular positions.

[0090] A measuring rod 5 is inserted inside the spring cylinder 4, and the measuring rod 5 can perform linear reciprocating motion within the spring cylinder 4. A spring is installed inside the spring cylinder 4 to provide an outward elastic force to the measuring rod 5.

[0091] The corresponding testing method is as follows:

[0092] Install the measuring instrument body 1 on the well plug connector 2, so that the measuring instrument body 1 fits against the clamping contact surface 6 of the well plug connector 2.

[0093] According to the testing requirements, adjust the angle position of the spring cylinder 4 inside each fixing hole 9. By rotating the spring cylinder 4, the protrusions on the spring cylinder 4 are engaged in different slots, thereby fixing the spring cylinder 4 at the required angle position. Each spring cylinder 4 can be adjusted to different angle positions to achieve the testing of different angles of the bolt head contact surface 7.

[0094] After adjustment, the gripper 3 of the control well plug connector 2 moves, restricting the measuring instrument body 1 onto the clamping contact surface 6. A measuring gap is formed between the fixed measuring instrument body 1 and the plug head contact surface 7.

[0095] First, perform a static test: check whether the indicating end of each measuring rod 5 protrudes through the fixing hole 9. If there is a measuring rod 5 that does not protrude through the fixing hole 9, it is determined that the wear at the contact surface 7 of the corresponding bolt of that measuring rod 5 exceeds the standard.

[0096] If the indicator ends of all measuring rods 5 protrude through the fixing holes 9, then perform dynamic testing: rotate the measuring instrument body 1 at least one revolution and check the status of each measuring rod 5 in real time during the rotation.

[0097] During rotation, if the indicator end of any measuring rod 5 is found to retract into the fixing hole 9, or if the rotational resistance of the measuring instrument body 1 is felt to increase beyond the preset threshold, the rotation should be stopped immediately, and the condition of each measuring rod 5 should be carefully checked to determine the specific location where the wear exceeds the standard.

[0098] If, after the measuring instrument body 1 rotates one revolution, the indicating ends of all measuring rods 5 remain protruding from the fixed holes 9, and the rotational resistance does not increase to the threshold, then the wear degree of the well plug connector 2 is considered to meet the standard.

[0099] By adjusting the angle of the spring cylinder 4, different angles and positions of the bolt head contact surface 7 can be detected, improving the comprehensiveness and accuracy of the detection. This multi-angle detection method is particularly suitable for detecting wear defects that only appear at specific angles. In this embodiment, the four fixing holes 9 correspond to four slot positioning angles. By adjusting the angles of all spring cylinders 4 to the four angles in one go, and then rotating the measuring instrument body 1 one full turn, the detection can be completed.

[0100] This invention is not limited to the optional embodiments described above, and anyone can derive other various forms of products based on the inspiration of this invention. The specific embodiments described above should not be construed as limiting the scope of protection of this invention; the scope of protection of this invention should be determined by the claims, and the specification can be used to interpret the claims.

Claims

1. A wellbore plug joint wear gauge for detecting the wear degree of a wellbore plug joint (2), wherein the annular surface of the wellbore plug joint (2) in contact with the oil filling pipe head includes a clamping contact surface (6) and a plug head contact surface (7), characterized in that: It includes an annular measuring instrument body (1) placed on the contact annular surface of the well plug joint (2) and the contact oil pipe head, and several measuring rods (5) set on the measuring instrument body (1) with equal central angle spacing. The measuring rod (5) is movably connected to the measuring instrument body (1) and the measuring rod (5) is subject to restricted linear reciprocating motion relative to the measuring instrument body (1); One end of the measuring rod (5) is the contact end of the contact surface (7) of the contact pin, and the other end is the indicator end. When the contact end is in the initial position, the gap between it and the measuring instrument body (1) is smaller than the gap between the measuring instrument body (1) and the contact surface (7) of the contact pin. The measuring instrument body (1) has markings for calibrating the relative displacement between the indicator end and the measuring instrument body (1), and the degree of wear is reflected by the obtained relative displacement. The measuring instrument body (1) is provided with a plurality of fixing holes (9), and the marking is set on the end face of the hole through which the indicating end passes; The measuring rod (5) is elastically confined within the fixing hole (9), and the end of the measuring rod (5) that falls from the end face of the measuring instrument body (1) toward the contact annular surface of the oil filling pipe head of the ground well plug joint (2) is the contact end; The fixing hole (9) is fitted with a spring cylinder (4), and the measuring rod (5) passes through the spring cylinder (4) and is elastically limited by the spring cylinder (4); The spring cylinder (4) provides an elastic force to the contact end of the measuring rod (5) so that it always moves outward, and the indicating end moves outward into the fixing hole (9) to indicate the displacement against the elastic force of the spring cylinder (4). The measuring instrument body (1) is rotatably connected to a sliding ring (8). When the measuring instrument body (1) is placed on the contact ring surface of the well plug connector (2) and the oil filling pipe head, the sliding ring (8) is clamped by the jaws (3) of the well plug connector (2) to limit the position and maintain the degree of freedom of rotation of the measuring instrument body (1) relative to the well plug connector (2). The fixing hole (9) is an oblong hole. The spring cylinder (4) is connected to the fixing hole (9) by a rotating shaft with restricted rotation. The rotating shaft is perpendicular to any radius line of the measuring instrument body (1). When the spring cylinder (4) rotates relative to the fixing hole (9), it drives the measuring rod (5) to rotate. Several slots are provided on the inner wall of the fixing hole (9) along the rotation trajectory of the spring cylinder (4), and the spring cylinder (4) is provided with protrusions that cooperate with the slots for limiting the movement; The measuring rod (5) is inserted into the spring cylinder (4) and is elastically limited by the spring cylinder (4). The end of the measuring rod (5) that falls from the measuring instrument body (1) toward the end face of the contact annular surface of the oil filling pipe head of the well plug connector (2) is the contact end. The contact end is a cylindrical structure with a sharp annular edge.

2. The well bolt joint wear gauge according to claim 1, characterized in that: The spring cylinder (4) has bendable clips (10) on both ends. When the spring cylinder (4) is inserted into the fixing hole (9), the clips (10) on both ends bend and deform into the fixing hole (9), causing the spring cylinder (4) to be engaged and limited with the inner wall of the fixing hole (9).

3. The well bolt joint wear gauge according to claim 1, characterized in that: The spring cylinder (4) has a metal spring piece that is elastically limited by the spring cylinder (4). When the measuring rod (5) contacts the well plug connector (2), contacts the oil filling pipe head, and is pressed and rebounds, the metal spring piece is displaced by force and hits the spring cylinder (4) to produce a popping sound when the indicating end of the measuring rod (5) passes through the fixing hole (9). When the indicating end of the measuring rod (5) retracts into the fixing hole (9), the metal spring piece resets and hits the spring cylinder (4) again to produce a popping sound.

4. A testing method, characterized in that: The wear gauge for well bolt joints as described in claim 1 is used as follows: The measuring instrument body (1) is installed on the well plug connector (2) and attached to the clamping contact surface (6). Then, the jaws (3) of the well plug connector (2) are controlled to fix the measuring instrument body (1) on the clamping contact surface (6). After fixing, the measuring instrument body (1) and the plug head contact surface (7) have a measuring gap. The measuring rod (5) contacts the plug head contact surface (7) in the measuring gap and rebounds. After the measuring rod (5) rebounds to the position, the wear amount is determined by referring to the relative position relationship with the mark.

5. A testing method, characterized in that: The wear gauge for well bolt joints as described in any one of claims 1-3 is specifically as follows: The measuring instrument body (1) is installed on the well plug connector (2) and attached to the clamping contact surface (6). Then, the jaws (3) of the well plug connector (2) are controlled to restrict the measuring instrument body (1) on the clamping contact surface (6). The fixed measuring instrument body (1) and the plug head contact surface (7) have a measurement gap. There is a sliding gap between the jaws (3), the measuring instrument body (1) and the clamping contact surface (6). The measuring rod (5) contacts the contact surface (7) of the bolt head in the measuring gap and rebounds. After the measuring rod (5) rebounds to the position, touch the port of the fixing hole (9) facing the outside with your hand, and then rotate the measuring instrument body (1). If you touch the indicator end of the measuring rod (5) and it does not go out of the fixing hole (9), it is confirmed that the wear degree is greater than the specified value and does not meet the standard. If all measuring rods (5) remain out of the fixing hole (9) after rotating the measuring instrument body (1) for at least one week, it is determined that the wear degree meets the standard.

6. A testing method, characterized in that: The wear gauge for the well bolt joint as described in claim 3 is used as follows: Install the measuring instrument body (1) on the well plug connector (2) and attach it to the clamping contact surface (6). Then adjust the slot position corresponding to the spring cylinder (4) in the fixing hole (9) so that all the spring cylinders (4) on the entire measuring instrument body (1) are in different slot positions. Then control the action of the jaw (3) of the well plug connector (2) to restrict the measuring instrument body (1) on the clamping contact surface (6), and the fixed measuring instrument body (1) and the plug head contact surface (7) have a measurement gap; If, in a static state, there is a measuring rod (5) that does not pass through the fixing hole (9), it is determined that the wear at the contact surface (7) of the corresponding bolt (5) exceeds the standard. If the indicating end of all measuring rods (5) passes through the fixing hole (9), the measuring instrument body (1) is rotated at least one revolution and checked in real time. If there is a measuring rod (5) that does not pass through the fixing hole (9) or the rotation resistance of the measuring instrument body (1) increases beyond the threshold, the rotation is stopped and the condition of each measuring rod (5) is checked to determine the location of excessive wear. If, after the measuring instrument body (1) rotates one revolution, all measuring rods (5) always pass through the fixing hole (9) and the rotation resistance does not increase to the threshold, the wear is considered to be within the standard.

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