CN204457738U - The omnidistance online stress detection device of Oil/gas Well down-hole casing post distribution type fiber-optic - Google Patents
The omnidistance online stress detection device of Oil/gas Well down-hole casing post distribution type fiber-optic Download PDFInfo
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- CN204457738U CN204457738U CN201420770754.0U CN201420770754U CN204457738U CN 204457738 U CN204457738 U CN 204457738U CN 201420770754 U CN201420770754 U CN 201420770754U CN 204457738 U CN204457738 U CN 204457738U
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Abstract
The utility model relates to Oil/gas Well down-hole casing post stress detection device technical field, it is the omnidistance online stress detection device of a kind of Oil/gas Well down-hole casing post distribution type fiber-optic, it comprises the sleeve pipe of strain detection testing device and at least three joints, between the sleeve pipe that at least one pair of is adjacent, be installed with flush type detect pipe nipple, all the other adjacent sleeve pipes are fixedly installed togather, and are installed with the U-shaped and axially symmetrical optical fiber of at least two difference at the outside spacers of sleeve pipe.The utility model reasonable and compact in structure, easy to use, it is carrying out in the process of strain detecting to casing string, the setting that flush type detects pipe nipple can prevent optical fiber to be shifted, ensure the installation position of optical fiber, improve the measuring accuracy detecting the full well section casing string strain data obtained, simultaneously, cement sheath and optical fiber are isolated, avoid cement sheath to collecting fiber to the interference that causes of strain data, further increase the measuring accuracy detecting the full well section casing string strain data obtained.
Description
Technical field
the utility model relates to Oil/gas Well down-hole casing post stress detection device technical field, is the omnidistance online stress detection device of a kind of Oil/gas Well down-hole casing post distribution type fiber-optic.
Background technology
distributed Detection optical fiber is used for the on-line real-time measuremen of Oil/gas Well down-hole military service casing string stress, is a novel detection technique grown up in the recent period.This technology is detected by the real-time continuous of omnidistance stress state of being on active service to Oil/gas Well down-hole military service casing string, obtain the actual stress state of down-hole casing post, for the mechanical strength design of Oil/gas Well down-hole casing post provides first hand detection data, for guaranteeing that the safe and reliable and rational in infrastructure of Oil/gas Well down-hole casing post provides direct design considerations.The mode that Distributed Detection optical fiber can only adopt the later stage to lay on Oil/gas Well down-hole casing post is installed, and its mounting means is clamped by Distributed Detection fiber segment and be attached on the external cylindrical surface of casing string.When after Oil/gas Well cementing, when annular space thes cement solidifies, because the Distributed Detection optical fiber be laid on casing string external cylindrical surface is between cement sheath and casing string, when down-hole casing post generation strain deformation, be laid on Distributed Detection optical fiber on casing string external cylindrical surface along with casing string generation strain deformation, the strain data adopting Distributed Detection optical fiber to obtain produces test error owing to being subject to the impact of cement sheath, reduces the accuracy of detection of Distributed Detection optical fiber to down-hole casing post strain data.
Summary of the invention
the utility model provides the omnidistance online stress detection device of a kind of Oil/gas Well down-hole casing post distribution type fiber-optic, overcome the deficiency of above-mentioned prior art, it effectively can solve the strain data adopting detection fiber to collect and is subject to the interference of cement sheath and causes the problem that the measuring accuracy of strain data declines.
the technical solution of the utility model is realized by following measures: the omnidistance online stress detection device of a kind of Oil/gas Well down-hole casing post distribution type fiber-optic, comprise the sleeve pipe of strain detection testing device and at least three joints, between the sleeve pipe that at least one pair of is adjacent, be installed with flush type detect pipe nipple, all the other adjacent sleeve pipes are fixedly installed togather, U-shaped and the axially symmetrical optical fiber of at least two difference is installed with at the outside spacers of sleeve pipe, one section of optical fiber is fixedly mounted on flush type in the shape of a spiral and detects on pipe nipple, the lead angle of spiral optical fiber is 45 degree, every signal input part of root optical fiber and the signal output part of strain detection testing device are electrically connected, every signal output part of root optical fiber and the signal input part of strain detection testing device are electrically connected.
here is the further optimization and/or improvements to above-mentioned utility model technical scheme:
above-mentioned optical fiber can be two, an optical fiber and another 90 degree, root optical fiber interval is distributed in sleeve pipe and flush type detects on pipe nipple, and the two ends being positioned at each the root optical fiber on same cross section distribute axisymmetricly.
above-mentioned flush type detects pipe nipple can comprise nipple body, through hole is had in the inner side of nipple body, outer lug boss is had outside the middle part of nipple body, outer lug boss is intervally distributed with about at least four to communicate and groove imbedded by spiral optical fiber, optical fiber is fixedly mounted on optical fiber by consolidating agent and imbeds in groove, has external screw thread or internal thread in the upper and lower of nipple body.
the lead angle that groove imbedded by above-mentioned each optical fiber can be 45 degree, and the import that groove upper end imbedded by each optical fiber is corresponding up and down with the outlet of its lower end.
above-mentioned outer lug boss can be distributed with four optical fiber and imbeds groove in 90 degree, interval.
the cross section of groove imbedded by above-mentioned optical fiber can in opening toward the outer side U-shaped; Or/and the top of outer lug boss is up-narrow and down-wide taper type, the bottom of outer lug boss is taper type wide at the top and narrow at the bottom; Or/and, internal thread is arranged at the top of nipple body, have external screw thread in the bottom of nipple body, the top of the sleeve pipe and nipple body that are positioned at nipple body top is fixedly installed togather by screw thread, and the bottom of the sleeve pipe and nipple body that are positioned at nipple body bottom is fixedly installed togather by screw thread.
the utility model reasonable and compact in structure, easy to use, it is carrying out in the process of strain detecting to casing string, the setting that flush type detects pipe nipple can prevent optical fiber to be shifted, ensure the installation position of optical fiber, improve the measuring accuracy detecting the full well section casing string strain data obtained, simultaneously, cement sheath and optical fiber are isolated, avoid cement sheath to collecting fiber to the interference that causes of strain data, further increase the measuring accuracy detecting the full well section casing string strain data obtained.
Accompanying drawing explanation
accompanying drawing 1 is that the master of the utility model most preferred embodiment looks sectional structure schematic diagram.
the master that accompanying drawing 2 detects pipe nipple for flush type looks half section structural representation.
accompanying drawing 3 be A-A after laying optical fiber in accompanying drawing 2 to sectional structure schematic diagram.
coding in accompanying drawing is respectively: 1 for strain detection testing device, and 2 be sleeve pipe, and 3 is flush type detection pipe nipple, and 4 is optical fiber, and 5 is nipple body, and 6 is through hole, and 7 is outer lug boss, and 8 imbed groove for optical fiber, and 9 is cement sheath.
Detailed description of the invention
the utility model by the restriction of following embodiment, can not determine concrete embodiment according to the technical solution of the utility model and actual conditions.
in the utility model, for convenience of description, the description of the relative position relation of each parts is all be described according to the Butut mode of Figure of description 1, as: the position relationship of forward and backward, upper and lower, left and right etc. determines according to the Butut direction of Figure of description 1.
below in conjunction with embodiment and accompanying drawing, the utility model is further described:
as shown in accompanying drawing 1 to 3, the omnidistance online stress detection device of this Oil/gas Well down-hole casing post distribution type fiber-optic comprises the sleeve pipe 2 of strain detection testing device 1 and at least three joints, between the sleeve pipe 2 that at least one pair of is adjacent, be installed with flush type detect pipe nipple 3, all the other adjacent sleeve pipes 2 are fixedly installed togather, U-shaped and the axially symmetrical optical fiber 4 of at least two difference is installed with at the outside spacers of sleeve pipe 2, one section of optical fiber 4 is fixedly mounted on flush type in the shape of a spiral and detects on pipe nipple 3, the lead angle of spiral optical fiber 4 is 45 degree, the signal input part of every root optical fiber 4 and the signal output part of strain detection testing device 1 are electrically connected, the signal output part of every root optical fiber 4 and the signal input part of strain detection testing device 1 are electrically connected.The setting that flush type detects pipe nipple 3 can prevent optical fiber 4 to be shifted, ensure the installation position of optical fiber 4, improve the measuring accuracy detecting the full well section casing string strain data obtained, simultaneously, cement sheath 9 and optical fiber 4 are isolated, avoid the interference that strain data that cement sheath 9 pairs of optical fiber 4 collect causes, further increase the measuring accuracy detecting the full well section casing string strain data obtained; Strain detection testing device 1 is existing known technology, and it can adopt Brillouin optical time domain analysis instrument.
according to actual needs, the omnidistance online stress detection device of above-mentioned Oil/gas Well down-hole casing post distribution type fiber-optic can be made further optimization and/or improvements:
as shown in accompanying drawing 1 to 3, optical fiber 4 is two, an optical fiber 4 and another 90 degree, root optical fiber 4 interval is distributed in sleeve pipe 2 and flush type detects on pipe nipple 3, and the two ends being positioned at each the root optical fiber 4 on same cross section distribute axisymmetricly.
as shown in accompanying drawing 1 to 3, flush type detects pipe nipple 3 and comprises nipple body 5, through hole 6 is had in the inner side of nipple body 5, outer lug boss 7 is had outside the middle part of nipple body 5, outer lug boss 7 is intervally distributed with about at least four to communicate and groove 8 imbedded by spiral optical fiber, optical fiber 4 is fixedly mounted on optical fiber by consolidating agent and imbeds in groove 8, has external screw thread or internal thread in the upper and lower of nipple body 5.The setting that groove 8 imbedded by optical fiber can prevent optical fiber 4 to be shifted, and has ensured the installation position of optical fiber 4, cement sheath 9 and detection fiber is isolated, the interference that the strain data avoiding cement sheath 9 pairs of detection fiber to collect causes.
as shown in accompanying drawing 1 to 3, the lead angle that groove 8 imbedded by each optical fiber is 45 degree, and the import that groove 8 upper end imbedded by each optical fiber is corresponding up and down with the outlet of its lower end.Each optical fiber import of imbedding groove 8 upper end setting corresponding up and down with the outlet of its lower end can ensure to detect with flush type the two adjacent uniformity saving the laying orientation of the measuring fiber on sleeve pipe 2 of pipe nipple 3, further increases the measuring accuracy of the casing string strain data of detection acquisition.
as shown in accompanying drawing 1 to 3, in outer lug boss 7,90 degree, interval is distributed with four optical fiber and imbeds groove 8.
as shown in accompanying drawing 1 to 3, the cross section that groove 8 imbedded by optical fiber is opening toward the outer side U-shaped; Or/and the top of outer lug boss 7 is up-narrow and down-wide taper type, the bottom of outer lug boss 7 is taper type wide at the top and narrow at the bottom; Or/and, internal thread is arranged at the top of nipple body 5, external screw thread is had in the bottom of nipple body 5, the sleeve pipe 2 being positioned at nipple body 5 top is fixedly installed togather by screw thread with the top of nipple body 5, and the sleeve pipe 2 being positioned at nipple body 5 bottom is fixedly installed togather by screw thread with the bottom of nipple body 5.
the use procedure of the utility model most preferred embodiment: the first step, flush type test nipple joint 3 is installed with between two sleeve pipes 2 that at least one pair of is adjacent, all the other adjacent sleeve pipes 2 are fixedly installed togather, U-shaped and the axially symmetrical optical fiber 4 of at least two difference is installed with at the outside spacers of sleeve pipe 2, one section of optical fiber 4 is fixedly mounted on sleeve pipe 2 in the shape of a spiral, the signal output part of optical fiber 4 and the signal input part of strain detection testing device 1 are electrically connected, the signal input part of optical fiber 4 and the signal output part of strain detection testing device 1 are electrically connected, by sleeve pipe 2 G.I.H together with flush type test nipple joint 3, strain data outside the sleeve pipe 2 being recorded down-hole by strain detection testing device 1 and outside flush type test nipple joint 3, second step, flush type test nipple joint 3 is installed with between two sleeve pipes 2 that at least one pair of is adjacent, all the other adjacent sleeve pipes 2 are fixedly installed togather, U-shaped and the axially symmetrical optical fiber 4 of at least two difference is installed with at the outside spacers of sleeve pipe 2, one section of optical fiber 4 is fixedly mounted on sleeve pipe 2 in the shape of a spiral, the signal output part of optical fiber 4 and the signal input part of strain detection testing device 1 are electrically connected, the signal input part of optical fiber 4 and the signal output part of strain detection testing device 1 are electrically connected, identical axial tensile loads is applied to sleeve pipe 2 and flush type test nipple joint 3 outside well, carries out simulated test, strain data outside the sleeve pipe 2 being recorded simulated test by strain detection testing device 1 and outside flush type test nipple joint 3, then, load data outside the sleeve pipe 2 that strain data outside the sleeve pipe 2 of simulated test and outside flush type test nipple joint 3 is separately converted to simulated test and outside flush type test nipple joint 3, then, by the load data outside the sleeve pipe 2 of simulated test and outside flush type test nipple joint 3 after data processing, index of correlation A between load data outside the flush type test nipple joint 3 of acquisition axial tensile loads and simulated test, simultaneously, obtain simulated test flush type test nipple joint 3 outside load and simulated test sleeve pipe 2 outside load data between index of correlation B, 3rd step, correction strain data outside the flush type test nipple joint 3 obtaining down-hole after the strain data outside the flush type test nipple joint 3 of the down-hole obtained in a first step being corrected with index of correlation A, then, with the correction strain data outside the flush type test nipple joint 3 of down-hole for correcting basic point data, with the correction strain data corrected outside the sleeve pipe 2 obtaining down-hole after basic point data and index of correlation B correct the strain data outside the sleeve pipe 2 of the down-hole obtained in a first step, finally, correction load data outside the sleeve pipe 2 correction strain data outside the sleeve pipe 2 of down-hole being converted into down-hole.
above technical characteristic constitutes most preferred embodiment of the present utility model, and it has stronger compliance and best implementation result, can increase and decrease non-essential technical characteristic according to actual needs, meet the demand of different situations.
Claims (10)
1. the omnidistance online stress detection device of Oil/gas Well down-hole casing post distribution type fiber-optic, it is characterized in that the sleeve pipe comprising strain detection testing device and at least three joints, between the sleeve pipe that at least one pair of is adjacent, be installed with flush type detect pipe nipple, all the other adjacent sleeve pipes are fixedly installed togather, U-shaped and the axially symmetrical optical fiber of at least two difference is installed with at the outside spacers of sleeve pipe, one section of optical fiber is fixedly mounted on flush type in the shape of a spiral and detects on pipe nipple, the lead angle of spiral optical fiber is 45 degree, every signal input part of root optical fiber and the signal output part of strain detection testing device are electrically connected, every signal output part of root optical fiber and the signal input part of strain detection testing device are electrically connected.
2. the omnidistance online stress detection device of Oil/gas Well down-hole casing post distribution type fiber-optic according to claim 1, it is characterized in that optical fiber is two, an optical fiber and another 90 degree, root optical fiber interval is distributed in sleeve pipe and flush type detects on pipe nipple, the two ends being positioned at each the root optical fiber on same cross section distribute axisymmetricly.
3. the omnidistance online stress detection device of Oil/gas Well down-hole casing post distribution type fiber-optic according to claim 1 and 2, it is characterized in that flush type detects pipe nipple and comprises nipple body, through hole is had in the inner side of nipple body, outer lug boss is had outside the middle part of nipple body, outer lug boss is intervally distributed with about at least four to communicate and groove imbedded by spiral optical fiber, optical fiber is fixedly mounted on optical fiber by consolidating agent and imbeds in groove, has external screw thread or internal thread in the upper and lower of nipple body.
4. the omnidistance online stress detection device of Oil/gas Well down-hole casing post distribution type fiber-optic according to claim 3, it is characterized in that the lead angle that groove imbedded by each optical fiber is 45 degree, the import that groove upper end imbedded by each optical fiber is corresponding up and down with the outlet of its lower end.
5. the omnidistance online stress detection device of Oil/gas Well down-hole casing post distribution type fiber-optic according to claim 3, to is characterized in that in outer lug boss that 90 degree, interval is distributed with four optical fiber and imbeds groove.
6. the omnidistance online stress detection device of Oil/gas Well down-hole casing post distribution type fiber-optic according to claim 4, to is characterized in that in outer lug boss that 90 degree, interval is distributed with four optical fiber and imbeds groove.
7. the omnidistance online stress detection device of Oil/gas Well down-hole casing post distribution type fiber-optic according to claim 3, is characterized in that the cross section that groove imbedded by optical fiber is opening toward the outer side U-shaped; Or/and the top of outer lug boss is up-narrow and down-wide taper type, the bottom of outer lug boss is taper type wide at the top and narrow at the bottom; Or/and, internal thread is arranged at the top of nipple body, have external screw thread in the bottom of nipple body, the top of the sleeve pipe and nipple body that are positioned at nipple body top is fixedly installed togather by screw thread, and the bottom of the sleeve pipe and nipple body that are positioned at nipple body bottom is fixedly installed togather by screw thread.
8. the omnidistance online stress detection device of Oil/gas Well down-hole casing post distribution type fiber-optic according to claim 4, is characterized in that the cross section that groove imbedded by optical fiber is opening toward the outer side U-shaped; Or/and the top of outer lug boss is up-narrow and down-wide taper type, the bottom of outer lug boss is taper type wide at the top and narrow at the bottom; Or/and, internal thread is arranged at the top of nipple body, have external screw thread in the bottom of nipple body, the top of the sleeve pipe and nipple body that are positioned at nipple body top is fixedly installed togather by screw thread, and the bottom of the sleeve pipe and nipple body that are positioned at nipple body bottom is fixedly installed togather by screw thread.
9. the omnidistance online stress detection device of Oil/gas Well down-hole casing post distribution type fiber-optic according to claim 5, is characterized in that the cross section that groove imbedded by optical fiber is opening toward the outer side U-shaped; Or/and the top of outer lug boss is up-narrow and down-wide taper type, the bottom of outer lug boss is taper type wide at the top and narrow at the bottom; Or/and, internal thread is arranged at the top of nipple body, have external screw thread in the bottom of nipple body, the top of the sleeve pipe and nipple body that are positioned at nipple body top is fixedly installed togather by screw thread, and the bottom of the sleeve pipe and nipple body that are positioned at nipple body bottom is fixedly installed togather by screw thread.
10. the omnidistance online stress detection device of Oil/gas Well down-hole casing post distribution type fiber-optic according to claim 6, is characterized in that the cross section that groove imbedded by optical fiber is opening toward the outer side U-shaped; Or/and the top of outer lug boss is up-narrow and down-wide taper type, the bottom of outer lug boss is taper type wide at the top and narrow at the bottom; Or/and, internal thread is arranged at the top of nipple body, have external screw thread in the bottom of nipple body, the top of the sleeve pipe and nipple body that are positioned at nipple body top is fixedly installed togather by screw thread, and the bottom of the sleeve pipe and nipple body that are positioned at nipple body bottom is fixedly installed togather by screw thread.
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| CN201420770754.0U CN204457738U (en) | 2014-12-09 | 2014-12-09 | The omnidistance online stress detection device of Oil/gas Well down-hole casing post distribution type fiber-optic |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533389A (en) * | 2014-12-09 | 2015-04-22 | 中国石油天然气集团公司 | Whole-course online stress detection device for oil-gas well underground casing string distributed optical fibers |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533389A (en) * | 2014-12-09 | 2015-04-22 | 中国石油天然气集团公司 | Whole-course online stress detection device for oil-gas well underground casing string distributed optical fibers |
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