CN109541015B - Detector in riser side pipe - Google Patents

Abstract

The invention discloses an in-pipe detector for a riser pipe, which comprises: a longitudinally long central axis, which has opposite front ends and rear ends, the front end is provided with a connecting head, and the rear end is provided with a plug end seat; At least two detection rings are sleeved between the connecting head and the plug end seat in the longitudinal direction of the shaft, and the detection rings include: two sliding sleeves sleeved on the central shaft at a predetermined distance; The two sliding sleeves are connected with a plurality of elastic pieces, and the plurality of the elastic pieces are evenly spaced along the circumferential direction; the elastic pieces have a mounting surface facing the wall of the tube to be measured; The sensor box is provided with sensors; the sensors of two adjacent detection rings are dislocated and distributed, and all the sensors can form a complete coverage in the circumferential direction. The invention can realize fast and efficient detection of the side pipe of the riser without dismantling the buoyancy block, thereby improving the detection time efficiency and reducing the operation cost.

Description

Riser side pipe detector

technical field

The invention relates to the technical field of detection devices, in particular to a detector in a side pipe of a riser.

Background technique

Drilling riser is the key equipment of semi-submersible platform, and its use performance is directly related to the safety of platform operation. Generally, a single riser includes a central riser main pipe and a plurality of riser side pipes (ie, riser auxiliary lines) surrounding the riser main pipe. The riser side pipe is an important part of a single riser. Generally, each riser has 4 or 5 auxiliary pipelines with different inner diameters, including high-pressure choke pipelines, well killing pipelines, drilling fluid boosting pipelines, hydraulic transmission pipelines, chemical injection pipelines, and the like. These pipelines are subject to high pressure during the working process, and the fluid medium in them is mostly corrosive, so their failure forms are often manifested as defects such as cracks on the inner wall caused by corrosion, erosion, and stress concentration. According to industry standards, every year Inspection is required.

At present, conventional non-destructive testing techniques such as magnetic particle and ultrasonic are usually used to detect the crack defects and wall thickness of the pipe body. The riser side pipe is a slender pipe body with a long length and a small inner diameter as a whole, and the existing testing equipment cannot enter the inside of the riser side pipe for testing. Therefore, the existing testing equipment is usually installed outside the riser side pipe for testing. However, in actual use, a buoyancy block needs to be arranged on the outside of the elongated riser side pipe. When using the existing detection equipment to scan and detect the riser side pipe in the longitudinal direction from the outside, it is inevitable that the buoyancy block will interfere with the existing detection. Therefore, when using the existing testing equipment for testing, it is necessary to remove the buoyancy block before testing, which has defects such as long operation cycle, low efficiency, and high cost.

Therefore, it is necessary to provide a new riser side pipe detector to overcome the problems in the prior art.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a riser side pipe detector, which can overcome the defects in the prior art, and can realize fast and efficient detection of the riser side pipe without dismantling the buoyancy block, thereby improving the detection time. , reduce operating costs.

Above-mentioned purpose of the present invention can adopt following technical scheme to realize:

A riser side pipe in-pipe detector, comprising:

The longitudinal center shaft has opposite front and rear ends, the front end is provided with a connecting head, and the rear end is provided with a plug end seat; sleeved on the connecting head along the longitudinal direction of the central axis and at least two detection rings between the plug end bases, the detection rings include:

two sliding sleeves sleeved on the central shaft at a predetermined distance;

a plurality of elastic pieces respectively connected with the two sliding sleeves, the plurality of the elastic pieces are evenly spaced along the circumferential direction; the elastic pieces have a mounting surface facing the wall of the tube to be measured;

a sensor box fixed on the mounting surface, the sensor box is provided with a sensor;

The sensors of the two adjacent detection rings are dislocated and distributed, and all the sensors can form a complete coverage in the circumferential direction.

In a preferred embodiment, a threaded segment is provided on the central shaft near at least one of the front end and the rear end, an adjusting nut is provided on the threaded segment, and the detection ring and the adjusting nut are arranged between the detection ring and the adjusting nut. A compression spring is provided between.

In a preferred embodiment, the detection ring includes: a front detection ring and a rear detection ring, two ends of the front detection ring are respectively provided with a first end sliding sleeve and a first intermediate sliding sleeve, the rear detection ring Two ends of the ring are respectively provided with a second intermediate sliding sleeve and a second end sliding sleeve; the first intermediate sliding sleeve and the second intermediate sliding sleeve are connected by a snap-fit manner.

In a preferred embodiment, the first intermediate sliding sleeve is provided with first teeth staggered at intervals, the second intermediate sliding sleeve is provided with second teeth at intervals, the first teeth and the second teeth The staggered engagement forms an engagement mechanism.

In a preferred embodiment, the first teeth and the second teeth cooperate with the central shaft to form an annular cavity, and a compression spring is arranged in the annular cavity.

In a preferred embodiment, the adjusting nut is disposed near the front end, between the adjusting nut and the first end sliding sleeve, and the second end sliding sleeve and the plug end seat There are compression springs in between.

In a preferred embodiment, the elastic member is a plate-shaped bow spring, each of the detection rings includes 8 bow springs, and a space between two adjacent bow springs in the front detection ring is The gap is aligned with the bow spring in the rear detection ring.

In a preferred embodiment, the plug end seat has a base and a front part arranged on the base, the front part is provided with a plurality of first wiring grooves uniformly distributed in the circumferential direction; Two wiring grooves, the signal lines and power lines of the sensors of the front detection ring and the rear detection ring are connected to the first wiring groove through the second wiring groove.

In a preferred embodiment, the connecting head is connected to the front end of the central shaft by means of threads, and a pulling hole is provided on the connecting head for passing the steel wire.

In a preferred embodiment, the sensor is a magnetic memory sensor.

The features and advantages of the present invention are that the detector in the side pipe of the riser provided by the present application is entirely located inside the side pipe of the riser, so the process of disassembling and assembling the buoyancy block is not required, and the operation cost is reduced.

The detector has at least two axially distributed detection rings, and the variable diameter function of the detection ring can keep the sensor in close contact with the inner wall of the pipeline during the entire detection process; in addition, the detection ring is evenly distributed in the circumferential direction There are multiple sensors, and the sensors of the front and rear sections are kept in an empty arrangement, that is, the inner wall scanned by the sensor of the detection ring of the latter section is the part that cannot be scanned by the sensor of the previous section, and each sensor on the detection ring of the two sections has no repeated scanning. , so as to realize the full coverage detection of the inner wall of the pipeline, and to achieve fast and efficient detection of the side pipe of the riser.

When the sensor box is close to the inner wall of the side pipe of the riser during detection by the detector, the accuracy and stability of the signal detected by the sensor can be ensured. In particular, when the distance between each sensor and the inner wall of the riser side pipe is constant, it is beneficial to obtain a constant lift-off value, which is beneficial to simplify the data processing of subsequent sensor signals and ensure the accuracy of data processing.

In addition, the front and rear two detection rings of the detector in the side pipe of the riser have a self-righting function, which can ensure that the detection ring will not be pulled out of shape when the pulling force is not in the center of the pipeline, so that the probe can always be in contact with the inner wall of the pipeline during the detection process. keep it parallel.

With reference to the following description and drawings, specific embodiments of the present application are disclosed in detail, indicating the manner in which the principles of the present application may be employed. It should be understood that the embodiments of the present application are not thereby limited in scope. Embodiments of the present application include many changes, modifications and equivalents within the spirit and scope of the appended claims.

Features described and/or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, in combination with, or instead of features in other embodiments .

It should be emphasized that the term "comprising/comprising" when used herein refers to the presence of a feature, integer, step or component, but does not exclude the presence or addition of one or more other features, integers, steps or components.

Description of drawings

1 is a schematic diagram of a detector in a riser side pipe in an embodiment of the present invention;

Fig. 2 is the front view of the detector in the side pipe of the riser in the embodiment of the present invention;

Fig. 3 is the left side view of the detector in the side pipe of the riser in the embodiment of the present invention;

4 is a schematic diagram of the central axis of the detector in the side pipe of the riser in the embodiment of the present invention;

5 is a schematic diagram of a detector connector in a riser side pipe in an embodiment of the present invention;

6 is a schematic diagram of an aerial plug end seat of a detector in a riser side pipe in an embodiment of the present invention;

7 is a schematic diagram of the first intermediate sliding sleeve of the detector in the side pipe of the riser according to the embodiment of the present invention;

8 is a schematic diagram of the second middle sliding sleeve of the detector in the side pipe of the riser according to the embodiment of the present invention;

9 is a schematic diagram of the bow reed of the detector in the side pipe of the riser in the embodiment of the present invention;

10 is a schematic diagram of a detector sensor box in a riser side pipe in an embodiment of the present invention.

Description of reference numbers:

1-connecting head; 12-pulling hole; 2-central shaft; 21-thread segment; 22-second wiring groove; 3-first end sliding sleeve; 4-bow reed; 40-intermediate segment; 5- Sensor box; 51-outer surface; 52-opening; 53-thread hole; 6-first middle sliding sleeve; 61-first tooth; 7-second middle sliding sleeve; 71-second tooth; 8-second end part sliding sleeve; 9-adjusting nut; 10-air plug end seat; 11-compression spring.

Detailed ways

The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. Various equivalent modifications of the invention are intended to fall within the scope defined by the claims appended hereto.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the present application are for the purpose of describing particular embodiments only, and are not intended to limit the present application.

It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

The present invention is mainly aimed at the detection device provided by the side pipe of the riser. The in-pipe detection device provided by the present invention can detect pipes with an inner diameter of 2 inches to 4 inches through adjustment, and is particularly suitable for detecting riser side pipes with various sizes and specifications.

The invention provides a riser side pipe detector, which can overcome the defects in the prior art, and can realize fast and efficient detection of the riser side pipes without dismantling the buoyancy block. Improve detection time and reduce operating costs.

Referring to FIGS. 1 to 10 , an embodiment of the present application provides an in-pipe detector for a riser. The in-pipe detector for a riser may include: a longitudinally elongated central axis 2 having opposite front and rear ends, so that The front end is provided with a connecting head 1, and the rear end is provided with a plug end seat; at least two detection rings are sleeved between the connecting head 1 and the plug end seat along the longitudinal direction of the central axis 2, The detection ring includes: two sliding sleeves sleeved on the central shaft 2 at a predetermined distance; a plurality of elastic pieces respectively connected with the two sliding sleeves, and a plurality of the elastic pieces The circumferential direction of the shaft 2 is evenly spaced; the elastic member has a mounting surface facing the wall of the tube to be measured; a sensor box 5 is fixed on the mounting surface, and the sensor box 5 is provided with a sensor; two adjacent The sensors of the detection ring are dislocated and distributed, and all the sensors can form a complete coverage in the circumferential direction.

When the detector in the riser side pipe provided in the present embodiment is used, the whole is located inside the riser side pipe, so the process of disassembling and assembling the buoyancy block is not required. The detector has at least two axially distributed detection rings, and the variable diameter function of the detection ring can keep the sensor in close contact with the inner wall of the pipeline during the entire detection process; in addition, the detection ring is evenly distributed in the circumferential direction There are multiple sensors, and the sensors of the front and rear sections are kept in an empty arrangement, that is, the inner wall scanned by the sensor of the detection ring of the latter section is the part that cannot be scanned by the sensor of the previous section, and each sensor on the detection ring of the two sections has no repeated scanning. , so as to achieve full coverage detection of the inner wall of the pipeline.

When the sensor box 5 is in close contact with the inner wall of the side pipe of the riser during detection by the detector, the accuracy and stability of the signal detected by the sensor can be ensured. In particular, when the distance between each sensor and the inner wall of the riser side pipe is constant, it is beneficial to obtain a constant lift-off value, which is beneficial to simplify the data processing of subsequent sensor signals and ensure the accuracy of data processing.

In addition, the front and rear two detection rings of the detector in the side pipe of the riser have a self-righting function, which can ensure that the detection ring will not be pulled out of shape when the pulling force is not in the center of the pipeline, so that the probe can always be in contact with the inner wall of the pipeline during the detection process. keep it parallel.

The present application will be described in detail below with reference to the specific drawings.

As shown in FIG. 4 , in the present embodiment, the central axis 2 is mainly used as the framework of the detector in the entire riser side pipe. The central shaft 2 may be an elongated tubular body structure as a whole, which has opposite front and rear ends. Wherein, the front end of the central shaft 2 may be provided with a connecting head 1 . Specifically, the front end can be connected with the connector 1 by means of screw connection.

As shown in FIG. 5 , the connecting head 1 may be provided with a pulling hole 12 , and the pulling hole 12 is used for passing the steel wire. During subsequent detection, the detector in the riser side pipe can be moved forward in the pipeline by pulling the steel wire rope.

As shown in FIG. 6 , the rear end of the central shaft 2 may be provided with a plug end seat, and specifically the plug end seat may be an aviation plug end seat 10 for integrating detector circuits. For example, the aviation plug end seat 10 may be provided with a plurality of wiring grooves, and the sensor signal lines and power lines drawn from the sensor box 5 may be accommodated in the aviation plug end seat 10 .

In one embodiment, in order to simplify the structure of the detector in the side pipe of the riser and ensure its reliability in use, the plug end seat can be matched with the central shaft 2 to realize the built-in signal line and power line of the sensor. Specifically, the plug end seat has a base and a front part arranged on the base, the front part is provided with a plurality of first wiring grooves uniformly distributed in the circumferential direction; the central shaft 2 is provided with a second wiring groove 22 , the signal wires and power wires of the sensors of the front detection ring and the rear detection ring are connected to the first wiring groove through the second wiring groove 22 .

During detection, the aviation plug end base 10 can be fixedly connected with the aviation plug female base. The fixed connection method can be welding, and certainly can also be other electrical connection methods. During detection, the aviation plug female socket is connected with the aviation plug male socket, and the collected data is transmitted to the acquisition card through the cable dragged by the aviation plug male socket, and then read into the computer, and analyzed and processed through the corresponding program. After each inspection, the aviation plug female seat can be separated from the aviation plug male seat, so as to realize the separation of the detector in the side pipe of the riser and the trailing cable.

As shown in FIG. 4 , a threaded segment 21 may be provided on the central shaft 2 near at least one of the front end and the rear end, and an adjusting nut 9 is provided on the threaded segment 21 . The detection ring is connected to the A compression spring 11 is provided between the adjusting nuts 9 .

In this embodiment, the diameter of the front end of the central shaft 2 is slightly smaller, and a threaded hole can be opened to install the connector 1 . The rear side of the threaded hole can be machined with a thread for installing the adjusting nut 9 . The rear end of the central shaft 2 is machined with threaded holes for installing the aviation plug end seat 10 , and the middle of the central shaft 2 is used to set the detection ring and the compression spring 11 . By adjusting the position of the adjusting nut 9, the outer diameter of the detection ring can be adjusted.

In this embodiment, the detection ring includes: a plurality of elastic pieces respectively connected with the two sliding sleeves, and the plurality of the elastic pieces are evenly distributed along the circumferential direction; when the elastic pieces are deformed, due to the Its own structure makes it have a variable diameter function.

In one embodiment, the detection ring may include: a front detection ring and a rear detection ring, two ends of the front detection ring are respectively provided with a first end sliding sleeve 3 and a first intermediate sliding sleeve 6, the rear detection ring Two ends of the detection ring are respectively provided with a second intermediate sliding sleeve 7 and a second end sliding sleeve 8; the first intermediate sliding sleeve 6 and the second intermediate sliding sleeve 7 are connected by a snap-fit manner.

Specifically, the first end sliding sleeve 3 or the second end sliding sleeve 8 may be annular as a whole, and the inside thereof is a hollow circular hole for matching with the outer wall of the central shaft 2 . The side wall of the first end sliding sleeve 3 or the second end sliding sleeve 8 is provided with a plurality of openings, and the openings are used for arranging connecting pieces. Wherein, the connecting piece is used to fix the end of the elastic piece on the end sliding sleeve. The connector can be in the form of a screw, of course, it can also be in other forms, which is not specifically limited in this application.

Wherein, the first intermediate sliding sleeve 6 and the second intermediate sliding sleeve 7 may have similar structures. For example, taking the first intermediate sliding sleeve 6 as an example, a first engaging portion for forming an engaging mechanism is provided on the basis of the end sliding sleeve. The second intermediate sliding sleeve 7 is provided with a second engaging portion for matching with the first engaging portion on the basis of the end sliding sleeve. The first engaging portion and the second engaging portion are The engaging parts cooperate to form the engaging mechanism. After the above-mentioned engaging mechanism is formed between the first intermediate sliding sleeve 6 and the second intermediate sliding sleeve 7, the front detection ring and the rear detection ring will not rotate relative to each other.

In one embodiment, as shown in FIG. 7 and FIG. 8 , it is a schematic structural diagram of the first intermediate sliding sleeve 6 and the second intermediate sliding sleeve 7 , respectively. The first intermediate sliding sleeve 6 is provided with first teeth 61 staggered at intervals, the second intermediate sliding sleeve 7 is provided with second teeth 71 at intervals, and the first teeth 61 and the second teeth 71 are interlaced. Combined to form an engaging mechanism.

Generally, there are two front and rear detection rings, and each sensor on each segment has a fixed number. For example, the number of sensors in each section is 8. Then, 16 sensors with independent labels are arranged in order to scan the inner wall of the pipeline, and the data of the 16 sensors are processed through the detection program and arranged in sequence on a plane. If a certain section of the detection ring rotates during the detection process, the sensor sequence will be disrupted, which will cause the results of a certain column of data to be arranged that cannot correspond to the inner wall surface detected during this period, and cannot be issued when the detection report is issued. Eliminating this effect will eventually result in an error in the detection report. To sum up, the engagement mechanism formed by the interlaced engagement of the first teeth 61 and the second teeth 71 can ensure that the relative positions of all sensors remain unchanged, which is beneficial to ensure accurate acquisition of subsequent detection data.

Further, the first teeth 61 and the second teeth 71 cooperate with the central shaft 2 to form an annular cavity, and a compression spring 11 is arranged in the annular cavity.

The number of the second teeth 71 of the first teeth 61 on the first intermediate sliding sleeve 6 and the second intermediate sliding sleeve 7 is the same. The number of the first teeth 61 may be multiple, which are distributed at intervals along the circumferential direction of the first intermediate sliding sleeve 6 . The number of the second teeth 71 may also be multiple, and they are distributed at intervals along the circumferential direction of the second intermediate sliding sleeve 7 . A first gap is formed between two adjacent first teeth 61 , and a second gap is formed between two adjacent second teeth 71 . The first teeth 61 are located in the second gap, and the second teeth 71 are located in the first gap.

After the first tooth 61 is engaged with the second tooth 71 , an annular cavity is formed between the first tooth 61 and the central shaft 2 , and a compression spring 11 is arranged in the annular cavity. In addition, the adjusting nut 9 is in contact with the first end sliding sleeve 3 , a compression spring 11 is provided between the adjusting nut 9 and the first end sliding sleeve 3 , and the second end sliding A compression spring 11 is also arranged between the sleeve 8 and the plug end seat. On the whole, the elastic member cooperates with the three compression springs 11, so that the detector in the side pipe of the riser has consistent elasticity, so that in the detection process, it is better to ensure that all the sensors (boxes) can be close to the inner wall of the pipeline, ensuring that The lift-off value does not change during detection.

In one embodiment, the sensor is a magnetic memory sensor. The elastic member is a plate-shaped bow spring 4 . The magnetic memory sensor can effectively detect defects such as corrosion, erosion, cracks, and stress concentration. Specifically, the magnetic memory sensor can be fixed in the sensor box 5 . The sensor box 5 can be fixed on the bow spring 4 by two screws.

As shown in FIG. 9 , the bow spring 4 has a first inclined section, a middle section 40 and a second inclined section, and the extension direction of the middle section 40 is consistent with the longitudinal extension direction of the central shaft 2 . The middle section 40 has a mounting surface matching with the sensor box 5 , and two openings are provided on the middle section 40 for passing screws when installing the sensor box 5 . The ends of the first inclined section and the second inclined section away from the middle section 40 are respectively provided with openings, which are used for passing screws when mating with the corresponding sliding sleeves.

As shown in FIG. 10 , the sensor box 5 is in the shape of a hollow box as a whole, which has opposite inner and outer surfaces 51 , opposite top and bottom surfaces, and opposite two side surfaces. Wherein, the inner surface may be provided with a groove for cooperating with the middle section 40 of the bow spring 4 . The outer surface 51 may have a predetermined arc. The size of the radian can be matched with the inner diameter of the side pipe of the riser to be tested, so as to better fit with the inner wall of the side pipe of the riser to be tested, so as to achieve accurate data acquisition. The side surface has an opening 52 that communicates with the interior, and the sensor is installed into the sensor box 5 through the opening 52 . The top surface is provided with a wire hole 53 for passing the sensor signal wire.

In a specific embodiment, each of the detection rings includes 8 bow springs 4, the gap between two adjacent bow springs 4 in the front detection ring and the bow springs in the rear detection ring Sheet 4 is facing each other, and as a whole, the 16-channel sensors can form a complete coverage in the circumferential direction, realize full coverage scanning of the inner wall of the pipeline, and have high detection efficiency. Of course, the number of the detection rings and the number of sensors provided in each detection ring can also be adaptively adjusted according to actual needs, which is not limited in this application. Generally, in order to ensure that the multiplex sensors form a complete coverage in the circumferential direction, the gap between at least two adjacent sensors can be smaller than or equal to the width of the adjacent sensors.

Before using the detector in the side pipe of the riser proposed in the embodiment of the present invention, first install the aviation plug end seat 10 on the rear end of the central shaft 2 through screws; then insert a compression spring 11 from the front end of the central shaft 2; The front end of the central shaft 2 is sleeved with a detection ring. The detection ring is composed of a sliding sleeve and an intermediate sliding sleeve on which 8 bow reeds 4 are installed circumferentially. The middle of each bow reed 4 is fixed with a magnetic memory sensor by two screws. The sensor box 5; then a compression spring 11 is inserted from the front end of the central shaft 2; then another detection ring is inserted from the front end of the central axis 2, the detection ring is composed of the middle sliding sleeve, the bow spring 4, the sensor box 5, the end Then a compression spring 11 is inserted from the front end of the central shaft 2; then the adjusting nut 9 is screwed into the front end of the central shaft 2; finally, the connector 1 is installed on the front end of the central shaft 2 by screws.

During detection, the wire rope is used to pass through the pulling hole 12 of the connecting head 11, and the detector moves forward in the pipeline by pulling the wire rope. When testing, the air plug female socket and the male socket are connected, and the collected data is transmitted to the acquisition card through the cable dragged behind the male socket, and then read into the computer for analysis and processing through the corresponding program. After each test, the female socket and the male socket are connected. The seat is unscrewed to realize the separation of the detector and the trailing cable.

The present application develops a special riser side pipe detection device for drilling risers, which realizes rapid and efficient detection of the riser and its auxiliary pipelines without dismantling the buoyancy block, thereby improving the detection timeliness and reducing operating costs. . Specifically, combined with the specific structure of the detection device in the side pipe of the riser, the following technical effects are also obtained.

1. The device is suitable for a wide range of pipe diameters. By adjusting the adjusting nut 9, the protruding angle of the bow spring 4 can be changed, thereby changing the expanded outer diameter of the detection ring. It can be used to detect pipes with an inner diameter of 2 inches to 4 inches. The requirements for all auxiliary lines of the riser have been met.

2. The device detects two sections in the front and back, and each section is equipped with multi-channel sensors, such as 8-channel sensors, which are arranged in front and rear. Through one detection, 16-channel sensors can achieve full coverage scanning of the inner wall of the pipeline, and the detection efficiency is high; The two-section detection ring gives it a self-righting function, which can ensure that the detection ring will not be pulled out of shape when the pulling force is not in the center of the pipeline, so that the probe can always be kept parallel to the inner wall of the pipeline during the detection process.

3. The design of the bow spring 4 and the three compression springs 11 endows the overall elastic consistency of the detection device, so that during the detection process, all sensors (boxes) can be close to the inner wall of the pipeline to ensure the lift-off value during the detection process. will not change; and the special connection method of the first intermediate sliding sleeve 6 and the second intermediate sliding sleeve 7 provides space for the compression spring 11 and also ensures that the relative positions of the front and rear sensors will not change, and the presentation of the data processing results. more persuasive.

Any numerical value recited herein includes all values of the lower value and the upper value in one unit increments from the lower value to the upper value, there being a separation of at least two units between any lower value and any higher value That's it. For example, if the number of components or process variables (eg, temperature, pressure, time, etc.) are stated to have values from 1 to 90, preferably from 20 to 80, more preferably from 30 to 70, the intent is to illustrate that the The specification also explicitly lists values such as 15 to 85, 22 to 68, 43 to 51, 30 to 32, and the like. For values less than 1, one unit is appropriately considered to be 0.0001, 0.001, 0.01, 0.1. These are merely examples of what is intended to be express, and all possible combinations of numerical values recited between the lowest value and the highest value are considered to be expressly set forth in this specification in a similar fashion.

Unless otherwise stated, all ranges include the endpoints and all numbers between the endpoints. "About" or "approximately" used with a range applies to both endpoints of the range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30," including at least the indicated endpoints.

All articles and references disclosed herein, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of" describing a combination shall include the identified element, ingredient, component or step as well as other elements, components, components or steps that do not materially affect the essential novel characteristics of the combination. Use of the terms "comprising" or "comprising" to describe combinations of elements, ingredients, components or steps herein also contemplates embodiments consisting essentially of those elements, ingredients, components or steps. By use of the term "may" herein, it is intended to indicate that "may" include any described attributes that are optional.

A plurality of elements, components, components or steps can be provided by a single integrated element, component, component or step. Alternatively, a single integrated element, component, component or step may be divided into separate multiple elements, components, components or steps. The disclosure of "a" or "an" used to describe an element, ingredient, part or step is not intended to exclude other elements, ingredients, parts or steps.

The above-mentioned various embodiments in this specification are described in a progressive manner, and the same and similar parts between the various embodiments may be referred to each other, and each embodiment focuses on the differences from other embodiments.

The above descriptions are only a few embodiments of the present invention. Although the embodiments disclosed in the present invention are as above, the above-described content is only an embodiment adopted to facilitate the understanding of the present invention, and is not intended to limit the present invention. Any person skilled in the art to which the present invention pertains, without departing from the spirit and scope disclosed by the present invention, can make any modifications and changes in the form and details of the embodiments, but the scope of patent protection of the present invention, The scope as defined by the appended claims shall still prevail.

Claims (7)

1. A riser inside-riser detector, comprising:

the connector comprises a longitudinal central shaft, a connecting rod and a plug end seat, wherein the longitudinal central shaft is provided with a front end and a rear end which are opposite, the front end is provided with a connector, and the rear end is provided with the plug end seat; along the lengthwise direction cover of center pin is established at least two between connector and the plug end socket detect the ring, it includes to detect the ring:

two sliding sleeves which are sleeved on the central shaft at intervals of a preset distance;

the elastic pieces are respectively connected with the two sliding sleeves and are uniformly distributed at intervals along the circumferential direction; the elastic piece is provided with a mounting surface facing the pipe wall to be measured;

the sensor box is fixed on the mounting surface, and a sensor is arranged in the sensor box;

the sensors of two adjacent detection rings are distributed in a staggered manner, and all the sensors can form a complete coverage surface in the circumferential direction; the detection ring includes: the detection device comprises a front detection ring and a rear detection ring, wherein a first end sliding sleeve and a first middle sliding sleeve are respectively arranged at two ends of the front detection ring, and a second middle sliding sleeve and a second end sliding sleeve are respectively arranged at two ends of the rear detection ring; the first middle sliding sleeve and the second middle sliding sleeve are connected in a clamping mode; first teeth staggered at intervals are arranged on the first middle sliding sleeve, second teeth at intervals are arranged on the second middle sliding sleeve, and the first teeth and the second teeth are clamped in a staggered mode to form a clamping mechanism; the first tooth and the second tooth are matched with the central shaft to form an annular cavity, and a pressure spring is arranged in the annular cavity.

2. The riser side pipe internal detector of claim 1, wherein a threaded section is provided on the central shaft near at least one of the front end and the rear end, an adjusting nut is provided on the threaded section, and a compression spring is provided between the detecting ring and the adjusting nut.

3. The riser skirt internal detector of claim 2, wherein said adjusting nut is disposed proximate said front end, and wherein a compression spring is disposed between said adjusting nut and said first end slide sleeve, and a compression spring is disposed between said second end slide sleeve and said plug end block.

4. The riser inside pipe detector of claim 3 wherein said resilient member is a plate-like bow spring, each of said detection rings comprises 8 bow springs, and the gap between two adjacent bow springs in said front detection ring is opposite to the bow spring in said rear detection ring.

5. The riser side pipe detector of claim 4 wherein said plug end block has a base and a front portion disposed on said base, said front portion having a plurality of first wiring grooves evenly distributed circumferentially; and a second wiring groove is formed in the central shaft, and the signal lines and the power lines of the sensors of the front detection ring and the rear detection ring are connected into the first wiring groove through the second wiring groove.

6. The detector of claim 1, wherein the connector is screwed to the front end of the central shaft, and the connector is provided with a pulling hole for passing a steel wire.

7. The riser side pipe detector of claim 1 wherein said sensor is a magnetic memory sensor.

Images