CN109541015B

CN109541015B - Detector in riser side pipe

Info

Publication number: CN109541015B
Application number: CN201811294931.1A
Authority: CN
Inventors: 刘书杰; 樊建春; 李强; 温东; 文敏; 刘祥元
Original assignee: China University of Petroleum Beijing; China National Offshore Oil Corp CNOOC; CNOOC China Ltd
Current assignee: China University of Petroleum Beijing; China National Offshore Oil Corp CNOOC; CNOOC China Ltd
Priority date: 2018-11-01
Filing date: 2018-11-01
Publication date: 2022-08-19
Anticipated expiration: 2038-11-01
Also published as: CN109541015A

Abstract

The invention discloses a detector in a riser side pipe, which comprises: the plug comprises a longitudinal central shaft, a plug body and a plug base, 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 base; 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 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 mode, and all the sensors can form a complete coverage surface in the circumferential direction. The invention can realize rapid and efficient detection of the riser side pipe without detaching the buoyancy block, thereby improving the detection timeliness and reducing the operation cost.

Description

Detector in riser side pipe

Technical Field

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

Background

The drilling riser is a key device of a semi-submersible platform, the use environment is severe, and the use performance of the drilling riser is directly related to the operation safety of the platform. Typically, a riser joint comprises a central riser main pipe and a plurality of riser side pipes (i.e. riser auxiliary lines) arranged around the riser main pipe. The riser side pipe is an important component of a single riser. Typically, each riser joint has 4 or 5 auxiliary lines of different internal diameter, including high pressure choke lines, kill lines, fluid pressure lines, hydraulic transmission lines, chemical injection lines, and the like. These pipelines are subjected to high pressure during operation, and the fluid medium therein is often corrosive, so that the failure forms thereof are often represented by defects such as cracks caused by corrosion, erosion, stress concentration on the inner wall, and the like, and the inspection is required every year according to the industry specifications.

At present, the crack defect and the wall thickness of the pipe body are generally detected by adopting conventional nondestructive detection technologies such as magnetic powder, ultrasonic and the like. The whole riser limit pipe is the slim and long type body that length is longer and the internal diameter is less, and current check out test set can't get into the interior detection of riser limit pipe. Therefore, the existing inspection equipment is usually installed outside the riser side pipe for inspection. However, in actual use, the buoyancy block needs to be disposed outside the long riser side pipe. When the existing detection equipment is used for scanning and detecting the riser in the longitudinal direction, the buoyancy block inevitably interferes with the existing detection. Therefore, when the existing detection equipment is used for detection, the buoyancy block needs to be removed first, and then the detection can be carried out, so that the defects of long operation period, low efficiency, high cost and the like exist.

Therefore, there is a need for a new riser inside-riser detector that overcomes the problems of the prior art.

Disclosure of Invention

The invention aims to provide an in-riser detector, which can overcome the defects in the prior art, and can realize quick and efficient detection on a riser edge pipe under the condition of not detaching a buoyancy block, so that the detection time efficiency is improved, and the operation cost is reduced.

The above object of the present invention can be achieved by the following technical solutions:

a riser in-riser detector, comprising:

the connector comprises a longitudinal central shaft, a connecting piece and a plug end seat, wherein the longitudinal central shaft is provided with a front end and a rear end which are opposite to each other; 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 mode, and all the sensors can form a complete coverage surface in the circumferential direction.

In a preferred embodiment, a threaded section is arranged on the central shaft at a position close to at least one of the front end and the rear end, an adjusting nut is arranged on the threaded section, and a compression spring is arranged between the detection ring and the adjusting nut.

In a preferred embodiment, the detection ring comprises: 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.

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, and the first teeth and the second teeth are staggered and clamped to form a clamping mechanism.

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

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

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

In a preferred embodiment, the plug end seat is provided with a base and a front part arranged on the base, and the front part is provided with a plurality of first wiring grooves which are uniformly distributed in the circumferential direction; 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.

In a preferred embodiment, the connector is connected to the front end of the central shaft through a thread, and the connector is provided with a drawing hole for passing a steel wire.

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

The invention has the characteristics and advantages that: the utility model provides a detector in riser limit pipe, during the use, whole inside that is located the riser limit pipe, consequently need not to carry out the process of dismouting buoyancy piece, reduction operating cost.

The detector is provided with at least two sections of detection rings which are distributed axially, and the diameter-variable function of the detection rings can be utilized to keep the sensor to be tightly attached to the inner wall of the pipeline in the whole detection process; in addition, the circumferential direction of the detection ring is uniformly distributed with a plurality of sensors, and the front and the rear two sections of sensors are in plug-in arrangement, namely, the inner wall scanned by the sensor of the rear section of detection ring is a part which can not be scanned by the front section of sensor, and each sensor on the two sections of detection rings has no repeated scanning, so that the full-coverage detection of the inner wall of the pipeline is realized, and the rapid and efficient detection of the side pipe of the marine riser can be realized.

When the sensor box clings to the inner wall of the riser side pipe during detection of the detector, the accuracy and the stability of signals detected by the sensor can be guaranteed. Particularly, when the distance between each sensor and the inner wall of the riser is constant, a constant lift-off value is obtained, so that the processing work of data of subsequent sensor signals is simplified, and the accuracy of data processing is ensured.

In addition, two sections detection ring around this marine riser limit in-pipe detector have from rightting the function, can guarantee when the tractive force is not at the pipeline centre that the detection ring can not be drawn inclined to one side and warp for the probe can keep the parallel state with the pipeline inner wall all the time in the testing process.

Specific embodiments of the present application are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the present application are not so limited in scope. The embodiments of the application include many variations, modifications and equivalents within the spirit and scope of the appended claims.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

FIG. 1 is a schematic view of a detector inside a side pipe of a water-separating pipe according to an embodiment of the present invention;

FIG. 2 is a front view of an in-line detector of a septal water line in accordance with an embodiment of the present invention;

FIG. 3 is a left side view of an in-line detector of a septal water line in accordance with an embodiment of the present invention;

FIG. 4 is a schematic diagram of a central axis of an in-tube detector of a lateral side of a water-separating tube according to an embodiment of the present invention;

FIG. 5 is a schematic view of a connector of an in-pipe detector at the side of a water-separating pipe according to an embodiment of the present invention;

FIG. 6 is a schematic view of an aerial terminal of an intraductal detector of a side of a water-separating pipe according to an embodiment of the present invention;

FIG. 7 is a schematic view of a first intermediate sliding sleeve of the intraductal detector of the septal water pipeline in accordance with the embodiment of the present invention;

FIG. 8 is a schematic view of a second intermediate sliding sleeve of the intraductal detector of the septal water pipeline in accordance with an embodiment of the present invention;

FIG. 9 is a schematic view of the detector bow spring in the septal water pipe side pipe in the embodiment of the invention;

FIG. 10 is a schematic view of an in-line detector sensor cartridge for a septal water pipeline in accordance with an embodiment of the present invention.

Description of reference numerals:

1-a connector; 12-a pull hole; 2-a central axis; 21-a threaded segment; 22-a second wiring groove; 3-a first end sliding sleeve; 4-bow reed; 40-middle section; 5-a sensor cartridge; 51-an outer surface; 52-opening; 53-threading holes; 6-a first intermediate sliding sleeve; 61-a first tooth; 7-a second intermediate sliding sleeve; 71-second teeth; 8-a second end slide; 9-adjusting the nut; 10-an aviation plug end seat; 11-compression spring.

Detailed Description

The technical solutions of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments, it should be understood that these embodiments are merely illustrative and not restrictive of the scope of the present invention, and various equivalent modifications of the present invention by those skilled in the art after reading the present invention fall within the scope of the appended claims of the present application.

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

It will be understood 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 the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The invention mainly provides a detection device for a riser side pipe. The in-pipe detection device provided by the invention can detect pipelines with inner diameters of 2-4 inches by adjusting, and is particularly suitable for detecting side pipes of marine risers with various dimensions.

The invention provides a riser side in-pipe detector, which can overcome the defects in the prior art, and can realize quick and efficient detection on a riser side pipe under the condition of not detaching a buoyancy block, so that the detection time efficiency is improved, and the operation cost is reduced.

Referring to fig. 1 to 10, in an embodiment of the present invention, a riser side in-pipe detector is provided, which may include: a longitudinal central shaft 2 having opposite front and rear ends, the front end being provided with a connector 1 and the rear end being provided with a plug end socket; along the lengthwise direction cover of center pin 2 is established at least two between connector 1 and the plug end socket detect the ring, it includes to detect the ring: two sliding sleeves sleeved on the central shaft 2 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 of the central shaft 2; the elastic piece is provided with a mounting surface facing the pipe wall to be measured; the sensor box 5 is fixed on the mounting surface, and a sensor is arranged in the sensor box 5; the sensors of two adjacent detection rings are distributed in a staggered mode, and all the sensors can form a complete coverage surface in the circumferential direction.

When the riser side pipe detector provided in the embodiment is used, the whole body is positioned inside the riser side pipe, so that a procedure of disassembling and assembling the buoyancy block is not needed. The detector is provided with at least two sections of detection rings which are distributed axially, and the diameter-variable function of the detection rings can be utilized to keep the sensor to be tightly attached to the inner wall of the pipeline in the whole detection process; in addition, the circumferential direction of the detection ring is uniformly distributed with a plurality of sensors, and the front and the rear two sections of sensors are in plug-in arrangement, namely, the inner wall scanned by the sensor of the rear section of detection ring is the part which can not be scanned by the sensor of the front section, and each sensor on the two sections of detection rings has no repeated scanning, thereby realizing the full-coverage detection of the inner wall of the pipeline.

When the detector detects that sensor box 5 hugs closely the inner wall of riser limit pipe, can guarantee the accuracy and the stability of the signal that the sensor detected. Particularly, when the distance between each sensor and the inner wall of the riser is constant, a constant lift-off value is obtained, so that the processing work of data of subsequent sensor signals is simplified, and the accuracy of data processing is ensured.

In addition, two sections front and back detection rings of this marine riser limit intraductal detector have from rightting the function, can guarantee when the tractive force is not at pipeline positive center that the detection ring can not be drawn inclined to one side and warp for the probe can keep the parallel state with the pipeline inner wall all the time in the testing process.

The present application is described in detail below with reference to the specific figures.

As shown in fig. 4, in the present embodiment, the center shaft 2 is mainly used as a skeleton of the entire riser side pipe detector. The central shaft 2 may be an overall elongated tubular structure having opposite front and rear ends. Wherein, the front end of the central shaft 2 can be provided with a connector 1. Specifically, the front end can be connected with the connector 1 in a threaded connection manner.

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

As shown in fig. 6, the rear end of the central shaft 2 may be provided with a plug end socket, which may be an aviation plug end socket 10 for an integrated detector circuit. For example, a plurality of wiring grooves may be provided in the aircraft plug end socket 10, and the sensor signal lines and the power supply lines led out from the sensor case 5 may be received in the aircraft plug end socket 10.

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

During detection, the aviation plug end socket 10 can be fixedly connected with an aviation plug female socket. The fixing connection may be welding, but may also be other electrical connection. During the detection, this aviation plug female seat is connected with aviation plug male seat, and the cable of dragging through aviation plug male seat is with data transmission to the collection card of gathering, and then reads in the computer, carries out analysis processes through corresponding procedure. After each detection is finished, the aviation plug female seat and the aviation plug male seat can be separated, so that the separation of the detector in the riser side pipe and the rear towing cable is realized.

As shown in fig. 4, a threaded section 21 may be disposed on the central shaft 2 near at least one of the front end and the rear end, an adjusting nut 9 is disposed on the threaded section 21, and a compression spring 11 is disposed between the detecting ring and the adjusting nut 9.

In this embodiment, the front end of the central shaft 2 has a slightly smaller shaft diameter and may have a threaded hole for mounting the connector 1. The rear side of the threaded hole can be processed with a section of thread for mounting the adjusting nut 9. The rear end of the central shaft 2 is provided with a threaded hole for installing an aviation plug end seat 10, and the middle part of the central shaft 2 is sleeved with a detection ring and a pressure 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: the elastic pieces are respectively connected with the two sliding sleeves and are uniformly distributed at intervals along the circumferential direction; when the elastic piece deforms, the elastic piece has a diameter-changing function due to the structure of the elastic piece.

In one embodiment, the detection loop may include: the detection device comprises a front detection ring and a rear detection ring, wherein a first end sliding sleeve 3 and a first middle sliding sleeve 6 are respectively arranged at two ends of the front detection ring, and a second middle sliding sleeve 7 and a second end sliding sleeve 8 are respectively arranged at two ends of the rear detection ring; the first middle sliding sleeve 6 is connected with the second middle sliding sleeve 7 in a clamping mode.

Specifically, the first end sliding sleeve 3 or the second end sliding sleeve 8 may be formed in a ring shape, and a hollow circular hole is formed inside the first end sliding sleeve 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 for fixing the end part of the elastic piece on the end part sliding sleeve. The connecting member may be in the form of a screw, and may be in other forms, which is not limited in this application.

Wherein, the first intermediate sliding sleeve 6 and the second intermediate sliding sleeve 7 can be of similar structures. For example, the first intermediate runner 6 is exemplified by a first engaging portion for forming an engaging mechanism provided in addition to the end runner. The second middle sliding sleeve 7 is provided with a second clamping part matched with the first clamping part on the basis of the end sliding sleeve, and the first clamping part and the second clamping part are matched to form the clamping mechanism. After the clamping mechanism is formed between the first middle sliding sleeve 6 and the second middle sliding sleeve 7, the front detection ring and the rear detection ring cannot rotate relatively.

In one embodiment, as shown in figures 7 and 8, there are schematic structural views of the first intermediate sliding sleeve 6 and the second intermediate sliding sleeve 7, respectively. The first middle sliding sleeve 6 is provided with first teeth 61 staggered at intervals, the second middle sliding sleeve 7 is provided with second teeth 71 at intervals, and the first teeth 61 and the second teeth 71 are clamped in a staggered mode to form a clamping mechanism.

Generally, the front and back sections of the detection ring have fixed numbers for each sensor on each section. For example, the number of sensors per section is 8. Then, 16 sensors with independent labels are sequentially arranged on the inner wall of the scanning pipeline, and data of the 16 sensors are processed by a detection program and are sequentially arranged on a plane. If a certain section of detection ring rotates in the detection process, the sequence of the sensors is disturbed, the result of data arrangement of a certain row cannot correspond to the inner wall surface detected in the period, the influence cannot be eliminated when a detection report is issued, and finally the detection report is wrong. In summary, the engaging mechanism formed by the staggered engagement of the first teeth 61 and the second teeth 71 can ensure that the relative positions of all the sensors remain unchanged, thereby being beneficial to ensuring accurate acquisition of subsequent detection data.

Further, the first tooth 61 and the second tooth 71 cooperate with the central shaft 2 to form an annular cavity, and a pressure 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 is the same as that of the second teeth 71 on the second intermediate sliding sleeve 7. The number of the first teeth 61 may be multiple, and the first teeth are distributed at intervals along the circumferential direction of the first intermediate sliding sleeve 6. The number of the second teeth 71 may be plural, and the second teeth may be 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 tooth 61 is located in the second gap and the second tooth 71 is located in the first gap.

After the first tooth 61 and the second tooth 71 are engaged with each other, an annular cavity is formed between the first tooth and the central shaft 2, and a pressure spring 11 is arranged in the annular cavity. In addition, adjusting nut 9 with first end sliding sleeve 3 contacts, adjusting nut 9 with be provided with pressure spring 11 between the first end sliding sleeve 3, second end sliding sleeve 8 with also be provided with pressure spring 11 between the plug end socket. On the whole, the elastic component cooperatees with three pressure springs 11 for this marine riser limit intraductal detector has unanimous elasticity, makes in the testing process, guarantees better that all sensors (box) can all hug closely the pipeline inner wall, guarantees to carry out the value and can not change in the testing process.

In one embodiment, the sensor is a magnetic memory sensor. The elastic piece is a plate-shaped bow spring piece 4. The magnetic memory sensor can effectively detect defects such as corrosion, erosion, cracks, stress concentration and the like. In particular, the magnetic memory sensor may be fixed in the sensor cartridge 5. The sensor housing 5 can be fixed to the bow spring 4 by two screws.

As shown in fig. 9, the bow spring plate 4 has a first inclined section, an intermediate section 40, and a second inclined section, and the intermediate section 40 extends in the same direction as the longitudinal direction of the central shaft 2. This interlude 40 has the installation face that matches with sensor box 5, is provided with two trompils on this interlude 40 for wear to establish the screw when installing sensor box 5. The end parts of the middle section 40, far away from the first inclined section and the second inclined section, are respectively provided with an opening for penetrating screws when being matched with corresponding sliding sleeves.

As shown in fig. 10, the sensor cartridge 5 has an overall hollow box shape having opposite inner and outer surfaces 51, opposite top and bottom surfaces, and opposite side surfaces. Wherein the inner surface may be provided with a groove for fitting with the middle section 40 of the bow spring 4. The outer surface 51 may have a predetermined curvature. The size of this radian can with the internal diameter phase-match of the marine riser limit pipe that awaits measuring to laminate with the marine riser limit pipe inner wall that awaits measuring better, realize the accurate acquisition of data. The side face has an opening 52 communicating with the inside, and the sensor is mounted into the sensor case 5 through the opening 52. The top surface is provided with a threading hole 53 for threading a sensor signal wire.

In a specific embodiment, each detection ring comprises 8 bow-shaped spring pieces 4, a gap between two adjacent bow-shaped spring pieces 4 in the front detection ring is opposite to the bow-shaped spring piece 4 in the rear detection ring, and the 16-path sensor can form a complete coverage surface in the circumferential direction on the whole, so that full-coverage scanning of the inner wall of the pipeline is realized, and the detection efficiency is high. Of course, the number of the detection rings and the number of the paths of the sensors disposed in each detection ring may also be adaptively adjusted according to actual needs, and the present application is not limited herein. In general, to ensure that the multiple 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 sensor.

Before the detector in the riser side pipe provided by the embodiment of the invention is used, an aviation plug end seat 10 is firstly installed at the rear end of a central shaft 2 through screws; then a pressure spring 11 is sleeved in the front end of the central shaft 2; then, a section of detection ring is sleeved in the front end of the central shaft 2, the detection ring consists of a sliding sleeve and a middle sliding sleeve, 8 bow reed pieces 4 are circumferentially arranged on the sliding sleeve, and a sensor box 5 of a magnetic memory sensor is fixedly arranged in the middle of each bow reed piece 4 through two screws; then a pressure spring 11 is sleeved in the front end of the central shaft 2; then another section of detection ring is sleeved in the front end of the central shaft 2, and the detection ring consists of a middle sliding sleeve, an arch spring sheet 4, a sensor box 5 and an end sliding sleeve; then a pressure spring 11 is sleeved in the front end of the central shaft 2; then screwing an adjusting nut 9 into the front end of the central shaft 2; and finally, the connector 1 is arranged at the front end of the central shaft 2 through screws.

When detection is carried out, a steel wire rope penetrates through the drawing hole 12 of the connector 11, and the detector advances in a pipeline by drawing the steel wire rope. During detection, the aviation plug female seat is connected with the male seat, collected data are transmitted to the collection card through the cable dragged behind the male seat, then the data are read to the computer to be analyzed and processed through a corresponding program, the female seat and the male seat are unscrewed after each detection, and the detector is separated from the rear dragging cable.

This application develops a dedicated riser limit intraductal detection device to the well drilling riser, realizes realizing under the condition of not tearing buoyancy piece open, realizes quick, the efficient detection to riser and auxiliary line to improve and detect the ageing, reduce the operating cost. Specifically, the concrete structure that combines this marine riser limit intraductal detection device still has following technological effect.

1. The device is suitable for the pipe diameter scope extensively, through adjustment adjusting nut 9, can change the outside convex angle of bow reed 4, and then changes the expansion external diameter that detects the ring, can be used to detect the pipeline of 2 inches to 4 inches internal diameters, has satisfied the requirement of the whole auxiliary line of marine riser.

2. The device has the advantages that the detection part comprises a front section and a rear section, each section is circumferentially provided with a plurality of sensors, such as 8-path sensors, the front section and the rear section are arranged in a hollow manner, 16-path sensors can realize full-coverage scanning of the inner wall of the pipeline through one-time detection, and the detection efficiency is high; and the front and back two sections of detection rings endow the self-righting function, and can ensure that the detection rings cannot be deflected and deformed when the pulling force is not in the center of the pipeline, so that the probe can be always kept in a parallel state with the inner wall of the pipeline in the detection process.

3. The design of the bow reed 4 and the three compression springs 11 endows the whole elasticity consistency of the detection device, so that all sensors (boxes) can be tightly attached to the inner wall of the pipeline in the detection process, and the lifting value cannot be changed in the detection process; and the special connection mode of the first middle sliding sleeve 6 and the second middle sliding sleeve 7 can ensure that the relative positions of the front and rear sensors cannot be changed while providing space for the pressure spring 11, and the data processing result is more persuasive.

Any numerical value recited herein includes all values from the lower value to the upper value that are incremented by one unit, as long as there is a separation of at least two units between any lower value and any higher value. For example, if it is stated that the number of a component or a value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, more preferably from 30 to 70, it is intended that equivalents such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also expressly enumerated in this specification. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are only examples of what is intended to be explicitly recited, and all possible combinations of numerical values between the lowest value and the highest value that are explicitly recited in the specification in a similar manner are to be considered.

Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. The use of "about" or "approximately" 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, including patent applications and publications, disclosed herein are incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, component, part, or step as well as other elements, components, parts, or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.

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

The above embodiments in the present specification are all described in a progressive manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment is described with emphasis on being different from other embodiments.

The above description is only a few embodiments of the present invention, and although the embodiments of the present invention are described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

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:

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.