Inner detecting device for subsea oil and gas pipeline
First Claim
1. An inner detecting device for subsea oil and gas pipeline, comprising:
- a support shaft defining a sealed chamber therein;
a packer cup coupled to the support shaft along a circumferential direction of the support shafta hinge assembly coupled to the support shaft, swinging with respect to the support shaft in a radial direction of the support shaft and sliding with respect to the support shaft in an axial direction of the support shaft;
a magnetic detector connected to the hinge assembly to move with respect to the support shaft in the radial and axial directions of the support shaft, and the magnetic detector tending to move away from the support shaft in the radial direction of the support shaft;
a battery pack disposed within the sealed chamber;
an electric recorder disposed within the sealed chamber and electrically connected to the battery pack; and
a mileage recorder disposed on the support shaft to record a travel distance of the inner detecting device within the pipeline,wherein the hinge assembly comprises;
a first hinge arm having a first end pivotally and movably coupled to the support shaft and a second end pivotally connected to the magnetic detector; and
a second hinge arm having a first end pivotally coupled to the support shaft and a second end pivotally connected to the first hinge arm,wherein the magnetic detector comprises;
a magnetic conductor;
a hinge mount disposed at a front end of the magnetic conductor and pivotally connected to the second end of the first hinge arm via a connecting shaft;
a plurality of magnets disposed above the magnetic conductor to form a closed magnetic flux loop;
a finger-shaped detector disposed on the magnetic conductor and located in a center of the closed magnetic flux loop;
a guide element disposed at rear end of the magnetic conductor and coupled to the support shaft, and the guide element being moved with respect to the support shaft in the radial and axial directions of the support shaft; and
a first elastic element disposed between the magnetic conductor and support shaft to normally push the magnetic conductor move away from the support shaft in the radial direction of the support shaft.
1 Assignment
0 Petitions
Accused Products
Abstract
An inner detecting device for subsea oil and gas pipeline includes a support shaft defining a sealed chamber therein; a packer cup coupled to the support shaft; a hinge assembly coupled to the support shaft, swinging with respect to the support shaft in a radial direction and sliding with respect to the support shaft in an axial direction; a magnetic detector connected to the hinge assembly to move with respect to the support shaft in the radial and axial directions, and the magnetic detector tending to move away from the support shaft in the radial direction; a battery pack; an electric recorder electrically connected to the battery pack; and a mileage recorder recording a travel distance of the inner detecting device within the pipeline.
8 Citations
13 Claims
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1. An inner detecting device for subsea oil and gas pipeline, comprising:
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a support shaft defining a sealed chamber therein; a packer cup coupled to the support shaft along a circumferential direction of the support shaft a hinge assembly coupled to the support shaft, swinging with respect to the support shaft in a radial direction of the support shaft and sliding with respect to the support shaft in an axial direction of the support shaft; a magnetic detector connected to the hinge assembly to move with respect to the support shaft in the radial and axial directions of the support shaft, and the magnetic detector tending to move away from the support shaft in the radial direction of the support shaft; a battery pack disposed within the sealed chamber; an electric recorder disposed within the sealed chamber and electrically connected to the battery pack; and a mileage recorder disposed on the support shaft to record a travel distance of the inner detecting device within the pipeline, wherein the hinge assembly comprises;
a first hinge arm having a first end pivotally and movably coupled to the support shaft and a second end pivotally connected to the magnetic detector; and
a second hinge arm having a first end pivotally coupled to the support shaft and a second end pivotally connected to the first hinge arm,wherein the magnetic detector comprises; a magnetic conductor; a hinge mount disposed at a front end of the magnetic conductor and pivotally connected to the second end of the first hinge arm via a connecting shaft; a plurality of magnets disposed above the magnetic conductor to form a closed magnetic flux loop; a finger-shaped detector disposed on the magnetic conductor and located in a center of the closed magnetic flux loop; a guide element disposed at rear end of the magnetic conductor and coupled to the support shaft, and the guide element being moved with respect to the support shaft in the radial and axial directions of the support shaft; and a first elastic element disposed between the magnetic conductor and support shaft to normally push the magnetic conductor move away from the support shaft in the radial direction of the support shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An inner detecting device for subsea oil and gas pipeline, comprising:
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a support shaft defining a sealed chamber therein; a packer cup coupled to the support shaft along a circumferential direction of the support shaft a hinge assembly coupled to the support shaft, swinging with respect to the support shaft in a radial direction of the support shaft and sliding with respect to the support shaft in an axial direction of the support shaft; a magnetic detector connected to the hinge assembly to move with respect to the support shaft in the radial and axial directions of the support shaft, and the magnetic detector tending to move away from the support shaft in the radial direction of the support shaft; a battery pack disposed within the sealed chamber; an electric recorder disposed within the sealed chamber and electrically connected to the battery pack; and a mileage recorder disposed on the support shaft to record a travel distance of the inner detecting device within the pipeline, wherein the packer cup comprises front and rear packer cups, and a ratio of a distance between the front and rear packer cups to an inner radius of the pipeline is 1;
1 to 1;
1.5,wherein front and rear mounting flanges are formed at front and rear portions of the support shaft respectively, and the front and rear packer cups are mounted to the front and rear mounting flanges respectively via stainless press plates, wherein the magnetic detector further comprises a concentrator disposed below the finger-shaped detector, the rear mounting flange defines a through-hole therein, a plurality of wires of the finger-shaped detector are concentrated to be a wire harness via the concentrator, so that a plug of the wire harness is connected to a socket of the finger-shaped detector through the through hole, the plug and the socket are made of nitrile-butadiene rubber and capable of bearing pressure of 0-20 MPa.
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11. An inner detecting device for subsea oil and gas pipeline, comprising:
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a support shaft defining a sealed chamber therein; a packer cup coupled to the support shaft along a circumferential direction of the support shaft; a hinge assembly coupled to the support shaft, swinging with respect to the support shaft in a radial direction of the support shaft and sliding with respect to the support shaft in an axial direction of the support shaft; a magnetic detector connected to the hinge assembly to move with respect to the support shaft in the radial and axial directions of the support shaft, and the magnetic detector tending to move away from the support shaft in the radial direction of the support shaft; a battery pack disposed within the sealed chamber; an electric recorder disposed within the sealed chamber and electrically connected to the battery pack; and a mileage recorder disposed on the support shaft to record a travel distance of the inner detecting device within the pipeline, wherein the battery pack comprises; a first radial seal disposed between the battery pack and an inner wall of the sealed chamber in the radial direction of the support shaft, a first axial seal disposed between the battery pack and the inner wall of the sealed chamber in the axial direction of the support shaft; and a first damping element disposed on an outer surface of the battery pack and made of polytetrafluoroethylene. - View Dependent Claims (12, 13)
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Specification