CN109025915B - Full-drift-diameter cross-isolation lower-return-hole-testing combined pipe column and operation method thereof - Google Patents
Full-drift-diameter cross-isolation lower-return-hole-testing combined pipe column and operation method thereof Download PDFInfo
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- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/116—Gun or shaped-charge perforators
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- E—FIXED CONSTRUCTIONS
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- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
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Abstract
The invention provides a high-efficiency and reliable combined pipe column for testing a return hole under a full-drift-diameter span interval and an operation method thereof aiming at the condition that a well-opening section exists above an oil layer to be tested, wherein the pipe column is provided with two ignition modes of rod throwing ignition and parallel booster pressure delay ignition at the same time above a perforating gun on the premise of reserving a pressure relief cavity, and when the rod throwing ignition is unsuccessful, the pressure ignition in the pipe column can be directly adopted, so that the complex operations of fishing and throwing rods after the rod throwing ignition fails and the like are avoided, the damage of underground instruments and meters is avoided, and the success rates of perforating and testing are improved; the technical scheme realizes the integrated operation of crossing the penetrated layer, perforating, testing, draining and reservoir transformation on the layer to be tested below the penetrated layer, can simplify the construction process, reduce the labor intensity, save the oil testing construction period and improve the construction efficiency and the success rate.
Description
Technical Field
The invention relates to the technical field of oil testing for oil exploration and development, in particular to a full-bore cross-over-isolation lower return hole-test combined string and an operation method thereof.
Background
Chinese patent application No. 200520106208.8's utility model discloses a stride to separate down and return perforation-test and flowing back integration oil test tubular column, its purpose is to waiting to test under the condition that there is the well-opening section above the oil reservoir, provide a return oil test tubular column under quick, it is not enough to lie in: firstly, the pipe column adopts a mode that an internal pressure transmission pipe passes through a slip packer, so that the full drift diameter cannot be realized, a rod throwing ignition mode cannot be adopted, and multi-process combined operation such as stratum testing, reservoir transformation, ropes and the like cannot be carried out; secondly, the tubular column is only provided with a pressure ignition head, and in case of failure of the ignition head, the tubular column can only be pulled out.
Chinese patent application No. 201520281072.8 discloses a cross-over lower return-throw stick perforation, test combined operation tubular column, and it is not enough to lie in: the string is only provided with an ignition tool of a rod throwing ignition head in a perforating gun method, and if the perforating gun is not detonated, a cable or a swabbing rope fisher can be used for fishing out the rod throwing, finding the reason, processing the problem and throwing the rod again. Due to the fact that the success rate of salvaging and throwing the rods of the deep well or the highly-deviated well is not high, in addition, construction and drilling machine working hours and costs are extremely high in severe conditions such as ocean and desert, salvaging wastes time and labor, if final perforation is unsuccessful and the rods are not thrown out, the tubular column can only be taken out of the well for reworking, and construction time is delayed.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention aims to provide a full-drift diameter span-interval lower return perforation-test combined string and an operation method thereof, which are convenient and reliable to operate, and under the premise of keeping a pressure release device and a pressure relief cavity, two ignition modes of rod throwing ignition and parallel explosion transfer type pressure delay ignition are simultaneously arranged above a perforating gun, so that the problems of low perforation success rate, shaking of the string, damage of underground instruments and meters and the like in the span-interval lower return perforation-test combined operation are effectively solved.
The purpose is realized by the following technical scheme:
a full-bore strides and separates lower return-jet hole-test combined pipe column, characterized by that, the said pipe column includes the oil line, expansion joint, depth correction nipple joint, oil line, switch sliding sleeve, RDS valve, lofting valve, LPR-N valve, external hanging pressure gauge supporting cylinder, RD sampler, hydraulic circulating valve, jar knocker, safety joint, full-bore strides and separates the packer, pressure gauge supporting cylinder, spacer tube, hydraulic circulating valve, safety joint, slips packer, shock absorber, glass plate circulation valve, oil line, throw stick firing head, parallel booster type pressure delay firing head, perforating gun assembly, release gear, pressure relief cavity that connect sequentially from top to bottom; the tool above the rod throwing ignition head is full-bore diameter, and the bore diameter is larger than phi 28 mm; a pressure gauge supporting cylinder and a spacing pipe are arranged between the full-diameter straddle packer and the slip packer, and a rod throwing ignition head and a parallel explosion propagating type pressure delay ignition head which are sequentially connected from top to bottom are arranged between the slip packer and the perforating gun assembly; and a release device and a pressure relief cavity which are connected in sequence are arranged below the perforating gun assembly.
Preferably, the parallel explosion propagation type pressure delay ignition head is connected to the downhole testing string and is a multi-layer tubular body, the parallel explosion propagation type pressure delay ignition head is provided with an outer layer, a middle layer and an inner layer along the radial direction, the outer layer is provided with an upper joint and a jacket joint from top to bottom along the axial direction, the middle layer is provided with a detonating cord frame, a plug, a shearing assembly, a sliding sleeve and a spline joint which are arranged on the inner side of the outer layer, and the inner layer is provided with a locking block sleeve, a locking block, a firing pin assembly and a delay detonator assembly which are arranged on the inner side of the sliding sleeve and the spline joint; the outer wall of the upper joint is radially provided with a first pressure transfer hole, the outer wall of the upper joint is axially provided with an explosion wire hole, an explosion wire is arranged in the explosion wire hole, and the explosion wire penetrates through the upper joint and the spline joint and extends to the lower end face of the spline joint; the outer wall of the sliding sleeve is radially provided with a second pressure transfer hole, the plug is a blind plug with a hollow cavity at the lower part, and a sealing ring is arranged outside the plug; an air cavity is arranged between the sliding sleeve and the upper joint;
preferably, the upper joint and the spline joint are sleeved through a spline, the outer sleeve joint is sleeved from the lower end of the spline joint and then connected with the lower end of the upper joint through threads, and the upper joint is connected with the lower end of the rod throwing ignition head through threads.
Preferably, a detonating cord for transmitting detonation generated by the firing bar firing head to the perforating gun assembly is arranged in the parallel booster type pressure delay firing head, and a delay detonator assembly for propagating detonation in parallel with the detonating cord is further arranged.
Preferably, in the parallel explosion propagation type pressure delay ignition head, the delay detonator assembly is positioned below the firing pin assembly, the delay detonator assembly is delayed by gunpowder, and the delay time is 1-30 minutes.
The invention also provides an operation method of the full-drift-diameter under-crossing retroreflective hole-testing combined pipe column, which is characterized by comprising the following steps of:
the first step is tubular column, depth correction, setting, throwing stick and igniting: connecting the full-drift-diameter span interval back-perforating-testing combined pipe column, setting the pipe column into the well to a designed depth, correcting the depth, adjusting the pipe column, setting all packers, and then opening the well and throwing the rod; judging whether the gun sounds or not by sensing the vibration of the tubular column or an instrument, if the gun sounds, skipping the second step, and directly performing the third step, otherwise, performing the second step;
and secondly, pressurizing the inside of the pipe column and igniting in a delayed manner: if the throwing of the rod fails to ignite (or the gun cannot be confirmed to sound), a low-density liquid cushion is fully filled in the pipe column, the pipe column is pressurized to the designed ignition pressure and the stable pressure of the parallel explosion-propagating type pressure delay ignition head, the pressure is released after 10-30 seconds, ignition is carried out after a certain time delay, and the perforating gun is ignited; judging whether the gun sounds or not by sensing the vibration of the tubular column or an instrument, if the gun is not determined to sound, starting a rod fishing and throwing process, fishing out and throwing the rod, and carrying out secondary rod throwing or tubular column pulling;
the third step is testing, reverse circulation well washing and sampling: after the perforation is confirmed to be successful, the well is opened and closed for many times according to the construction design requirement and the operation of the LPR-N valve, and the test before modification is carried out; after the test is finished, opening a switch sliding sleeve to carry out reverse circulation well washing, and carrying out production calculation and sampling analysis before modification according to data such as ground measurement or height of recovered materials;
step four, making the following measures: making a next measure scheme by comprehensively analyzing the test condition before modification, the stratum fluid property, the previous-stage logging, the geology and other conditions; if reservoir transformation is needed, the fifth step is carried out, otherwise, the sixth step is directly carried out;
the fifth step: reservoir transformation, liquid drainage, yield calculation and sampling: according to the measure scheme formulated in the last step, if the reservoir transformation is needed, reservoir transformation preparation is carried out according to the formulated reservoir transformation construction scheme, the test layer is acidized (or fractured), and liquid replacement, injection, liquid drainage and production demand are carried out according to the requirements of a construction design book; in the later stage of final flow, pressurizing the annulus to the operating pressure of the RD sampler, trapping the sample, and completing underground sampling before reservoir transformation;
and sixthly, circularly killing the well, deblocking and lifting the pipe column: after the oil testing procedure is completed, opening an RDS valve to perform circulating well killing operation; and after the well killing is finished, the well mouth is disassembled, the pipe column is directly lifted, all the packers are sequentially unpacked, and the full-drift-diameter span-interval lower return hole-test combined pipe column is completely lifted out.
By means of the technical scheme, the invention has the advantages that:
(1) on the premise of retaining the pressure release device and the pressure relief cavity, the tubular column is provided with two ignition modes of rod throwing ignition and parallel booster pressure delay ignition above the perforating gun, when rod throwing ignition is unsuccessful, pressure ignition in the tubular column can be directly adopted, complex operations such as fishing and rod throwing after the first rod throwing ignition failure are avoided, underground instrument and meter damage can be avoided, and perforating and testing success rate is greatly improved.
(2) Delay gunpowder is arranged in the parallel explosion propagation type pressure delay ignition head, and the delay time of the gunpowder is 1-30 minutes, so that the rod throwing ignition does not sound, a test pressure difference is formed when a pipe column pressurization ignition mode is switched, and the test induced spraying is facilitated.
(3) By adopting the full-drift-diameter straddle lower return perforation-test combined pipe column and the operation method thereof, the one-trip pipe column can realize straddle of a jetted layer and carry out perforation, test, liquid drainage and reservoir transformation integrated operation on a layer to be tested below the jetted layer, can simplify construction procedures, reduce labor intensity, save test oil construction period and improve construction efficiency and success rate, and has great significance for deep wells, offshore oil fields and other areas with high construction cost and high return risk.
Drawings
FIG. 1 is a full-bore straddle downhole return hole-test combined string according to the present invention.
Fig. 2 shows a parallel explosion propagation type pressure delay ignition head.
Detailed Description
In order to more fully and clearly disclose the objects, technical means and technical effects of the present invention, the following detailed description is given with reference to the accompanying drawings and part numbers.
As shown in fig. 2, the parallel explosion-propagating pressure delay firing head 24 includes: the detonating cord holder 51, the upper connector 52, the detonating cord 53, the detonating cord hole 531, the sliding sleeve 54, the locking block sleeve 55, the locking block 56, the firing pin assembly 57, the spline connector 58, the delay detonator assembly 59, the plug 60, the hollow cavity 601, the sealing ring 61, the shearing assembly 62, the shearing pin 621, the first pressure transmitting hole 631, the second pressure transmitting hole 632, the air cavity 64, the spline 65 and the outer sleeve connector 66.
The inner side of the upper joint 52 is sequentially provided with a detonating cord frame 51, a plug 60, a shearing assembly 62, a sliding sleeve 54, a locking block sleeve 55 and a locking block 56, the outer wall of the upper joint 52 is radially provided with a pressure transmission hole I631, the outer wall of the upper joint is axially provided with a detonating cord hole 531, and the detonating cord hole 531 is provided with a detonating cord 53; the inner side of the spline joint 58 is sequentially provided with a firing pin assembly 57 and a delay detonator assembly 59, the delay detonator assembly 59 contains delay powder, and the delay time is 1-30 minutes.
The upper joint 52 and the spline joint 58 are sleeved through a spline 65, the outer sleeve joint 66 is sleeved from the lower end of the spline joint 58 and is connected with the lower end of the upper joint 52 through threads, and the upper joint 52 is connected with the lower end of the rod throwing ignition head 23 through threads.
The working principle of the parallel explosion propagation type pressure delay ignition head 24 is as follows: if the upper rod throwing ignition head 23 is successfully ignited, the detonation from the rod throwing ignition head 23 is transmitted to a booster below the booster type pressure delay ignition head 24 through the detonating cord 53, and then the perforating gun assembly 25 is detonated; if the upper rod throwing ignition head 23 fails to ignite, the pressure in the pipe column is pressurized, and the pressure in the pipe column is transmitted from the pressure transmission hole I631 and is respectively transmitted to the upper end and the lower end of the sliding sleeve 54, so that the shearing pin 62 is sheared when the shearing pressure of the shearing pin 62 is reached under the action of the area difference of the upper end and the lower end of the sliding sleeve 54; the sliding sleeve 54 moves upward, the locking block 56 is released, the firing pin assembly 57 strikes the delay detonator assembly 59 under pressure, the pressure in the string is removed, and the perforating gun assembly 25 is detonated after the powder delay time is 1-30 minutes. Because the pressure in the pipe column is already released at the moment, the pressure of the liquid cushion in the pipe column is lower than the formation pressure, so that the testing negative pressure is caused, and the testing is finished.
As shown in fig. 1, a full-bore straddle-lower return-jet hole-testing combined pipe column comprises an oil pipe 1, an expansion joint 2, a depth-correcting short section 3, an oil pipe 4, a switch sliding sleeve 5, an RDS valve 6, a lofting valve 7, an LPR-N valve 8, an externally-mounted pressure gauge support cylinder 9, an RD sampler 10, a hydraulic circulating valve 11, a jar 12, a safety joint 13, a full-bore straddle packer 14, a pressure gauge support cylinder 15, a spacing pipe 16, a hydraulic circulating valve 17, a safety joint 18, a slip packer 19, a shock absorber 20, a glass disc circulation valve 21, an oil pipe 22, a throwing rod ignition head 23, a parallel explosion-propagating type pressure delay ignition head 24, a perforating gun assembly 25, a release device 26 and a pressure relief cavity 27 which are sequentially connected from top to bottom;
the tools above the rod throwing ignition head 23 are full-bore, and the bore diameter is larger than phi 28 mm; a spacing pipe 16 is arranged between the full-drift-diameter straddle packer 14 and the slip packer 19, and a rod throwing ignition head 23 and a parallel explosion-propagating type pressure delay ignition head 24 which are sequentially connected are arranged between the slip packer 19 and the perforating gun assembly 25; a release device 26 and a pressure relief cavity 27 which are connected in sequence are arranged below the perforating gun assembly 25.
The operation method of the full-drift-diameter under-span return-jet hole-test combined pipe column comprises the following steps:
the first step is tubular column, depth correction, setting, throwing stick and igniting: connecting the full-drift-diameter span interval back-perforating-testing combined pipe column, setting the pipe column into the well to a designed depth, correcting the depth, adjusting the pipe column, setting all packers, and then opening the well and throwing the rod; judging whether the gun sounds or not by sensing the vibration of the tubular column or an instrument, if the gun sounds, skipping the second step, and directly performing the third step, otherwise, performing the second step;
and secondly, pressurizing the inside of the pipe column and igniting in a delayed manner: if the throwing ignition fails or the gun sound cannot be confirmed, a low-density liquid cushion is fully filled in the pipe column, the pipe column is pressurized to the designed ignition pressure and the stable pressure of the parallel explosion-propagating type pressure delay ignition head 24 and then is decompressed, the ignition is carried out after a certain time delay, and the perforating gun is ignited; judging whether the gun sounds or not by sensing the vibration of the tubular column or an instrument, if the gun is not determined to sound, starting a rod fishing and throwing process, fishing out and throwing the rod, and carrying out secondary rod throwing or tubular column pulling;
the third step is testing, reverse circulation well washing and sampling: after the perforation is confirmed to be successful, the well is opened and closed for many times according to the operation of the LPR-N valve 8 and the requirements of construction design, and testing before modification is carried out; after the test is finished, opening the switch sliding sleeve 5 to carry out reverse circulation well washing, and carrying out production calculation and sampling analysis before modification according to data such as ground measurement or height of recovered materials;
step four, making the following measures: making a next measure scheme by comprehensively analyzing the test condition before modification, the stratum fluid property, the previous-stage logging, the geology and other conditions; if reservoir transformation is needed, the fifth step is carried out, otherwise, the sixth step is directly carried out;
the fifth step: reservoir transformation, liquid drainage, yield calculation and sampling: according to the measure scheme formulated in the last step, if the reservoir transformation is needed, reservoir transformation preparation is carried out according to the formulated reservoir transformation construction scheme, the test layer is acidized (or fractured), and liquid replacement, injection, liquid drainage and production demand are carried out according to the requirements of a construction design book; in the final flow later stage, the annulus is pressurized to the operating pressure of the RD sampler 10, the sample is trapped, and the underground sampling before reservoir transformation is completed;
and sixthly, circularly killing the well, deblocking and lifting the pipe column: after the oil testing procedure is completed, opening the RDS valve 6 to perform circulating well killing operation; and after the well killing is finished, the well mouth is disassembled, the pipe column is directly lifted, all the packers are sequentially unpacked, the full-drift-diameter span-interval lower return hole-test combined pipe column is completely lifted out, and the construction is finished.
The above description is only exemplary of the invention and should not be construed as limiting the scope of the invention, and all equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention are intended to be included within the scope of the appended claims.
Claims (5)
1. The full-bore cross-isolation lower-return-hole-testing combined pipe column is characterized by comprising an oil pipe (1), a telescopic joint (2), a depth correction short section (3), an oil pipe (4), a switch sliding sleeve (5), an RDS valve (6), a lofting valve (7), an LPR-N valve (8), an externally-mounted pressure gauge support cylinder (9), an RD sampler (10), a hydraulic circulating valve (11), a jar knocker (12), a safety joint (13), a full-bore cross-isolation packer (14), a pressure gauge support cylinder (15), a spacing pipe (16), a hydraulic circulating valve (17), a safety joint (18), a slip packer (19), a shock absorber (20), a glass disc circulation valve (21), an oil pipe (22), a rod throwing ignition head (23), a parallel propagation type pressure delay ignition head (24), a perforating gun assembly (25), A releasing device (26) and a pressure relief cavity (27);
the tool above the rod throwing ignition head (23) is full-bore, and the bore diameter is larger than phi 28 mm; a pressure gauge supporting cylinder (15) and a spacing pipe (16) are arranged between the full-drift-diameter straddle packer (14) and the slip packer (19), and a rod throwing ignition head (23) and a parallel explosion-propagating type pressure delay ignition head (24) which are sequentially connected from top to bottom are arranged between the slip packer (19) and the perforating gun assembly (25); and a release device (26) and a pressure relief cavity (27) which are connected in sequence are arranged below the perforating gun assembly (25).
2. The full-bore straddle downhole return hole-test combined string as claimed in claim 1, wherein: the parallel explosion propagation type pressure delay ignition head (24) is connected to a downhole test string and is a multi-layer tubular body, the parallel explosion propagation type pressure delay ignition head (24) is provided with an outer layer, a middle layer and an inner layer along the radial direction, the outer layer is provided with an upper joint (52) and an outer sleeve joint (66) from top to bottom along the axial direction, the middle layer is provided with a detonating cord frame (51), a plug (60), a shearing assembly (62), a sliding sleeve (54) and a spline joint (58) which are arranged on the inner side of the outer layer, and the inner layer is a locking block sleeve (55), a locking block (56), a firing pin assembly (57) and a delay detonator assembly (59) which are arranged on the inner side of the sliding sleeve (54) and the spline joint (58); the outer wall of the upper joint (52) is radially provided with a pressure transfer hole I (631), the outer wall of the upper joint is axially provided with an explosion wire hole (531), an explosion wire (53) is arranged in the explosion wire hole (531), and the explosion wire (53) penetrates through the upper joint (52) and the spline joint (58) and extends to the lower end face of the spline joint (58); a second pressure transfer hole (632) is radially formed in the outer wall of the sliding sleeve (54), the plug (60) is a blind plug with a hollow cavity (601) at the lower part, and a sealing ring (61) is arranged outside the plug (60); an air cavity (64) is arranged between the sliding sleeve (54) and the upper joint (52);
the upper connector (52) and the spline connector (58) are sleeved through a spline (65), the outer sleeve connector (66) is sleeved from the lower end of the spline connector (58) and then connected with the lower end of the upper connector (52) through threads, and the upper connector (52) is connected to the lower end of the rod throwing ignition head (23) through threads.
3. The full-bore straddle downhole return hole-test combined string as claimed in claim 1, wherein: the parallel booster pressure delay ignition head (24) is internally provided with a detonating cord (53) for transmitting detonation generated by the firing rod ignition head (23) to the perforating gun assembly (25), and is also provided with a delay detonator assembly (59) which is in parallel booster with the detonating cord (53).
4. The full-bore straddle downhole return hole-test combined string as claimed in claim 1, wherein: in the parallel explosion propagation type pressure delay ignition head (24), a delay detonator assembly (59) is positioned below a firing pin assembly (57), and the delay detonator assembly (59) adopts gunpowder for delay, wherein the delay time is 1-30 minutes.
5. An operation method of the full-drift-diameter straddle downhole perforating-testing combined string based on claim 1, characterized by comprising the following steps of:
the first step is tubular column, depth correction, setting, throwing stick and igniting: connecting the full-drift-diameter span-interval back-perforating-testing combined pipe column, setting the pipe column into the well to a designed depth, correcting the depth, adjusting the pipe column, setting all packers, and then opening the well and throwing a rod; judging whether the gun sounds or not by sensing the vibration of the tubular column or an instrument, if the gun sounds, skipping the second step, and directly performing the third step, otherwise, performing the second step;
and secondly, pressurizing the inside of the pipe column and igniting in a delayed manner: if the throwing ignition fails or the gun sound cannot be confirmed, a low-density liquid cushion is fully filled in the pipe column, the pipe column is pressurized to the designed ignition pressure and the stable pressure of a parallel explosion-propagating type pressure delay ignition head (24), and then the pressure is released after 10-30 seconds, and the ignition is carried out after a certain time delay, so that the perforating gun is detonated; judging whether the gun sounds or not by sensing the vibration of the tubular column or an instrument, if the gun is not determined to sound, starting a rod fishing and throwing process, fishing out and throwing the rod, and carrying out secondary rod throwing or tubular column pulling;
the third step is testing, reverse circulation well washing and sampling: after the perforation is confirmed to be successful, the well is opened and closed for many times according to the operation of the LPR-N valve (8) and the requirements of construction design, and testing before modification is carried out; after the test is finished, opening a switch sliding sleeve (5) to carry out reverse circulation well washing, and carrying out production calculation and sampling analysis before modification according to ground measurement or height data of recovered materials;
step four, making the following measures: making a next measure scheme by comprehensively analyzing the test condition before transformation, the stratum fluid property, the previous-stage logging and the geological condition; if reservoir transformation is needed, the fifth step is carried out, otherwise, the sixth step is directly carried out;
the fifth step: reservoir transformation, liquid drainage, yield calculation and sampling: according to the measure scheme formulated in the last step, if the reservoir transformation is needed, the reservoir transformation preparation is carried out according to the formulated reservoir transformation construction scheme, the test layer is acidified or fractured, and the liquid replacement, injection, liquid drainage and production demand are carried out according to the requirements of a construction design book; in the final flow later stage, the annular space is pressurized to the operation pressure of the RD sampler (10), the sample is trapped, and the underground sampling before reservoir transformation is completed;
and sixthly, circularly killing the well, deblocking and lifting the pipe column: after the oil testing procedure is finished, opening an RDS valve (6) and performing circulating well killing operation; and after the well killing is finished, the well mouth is disassembled, the pipe column is directly lifted, all the packers are sequentially unpacked, and the full-drift-diameter span-interval lower return hole-test combined pipe column is completely lifted out.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810900643.XA CN109025915B (en) | 2018-08-09 | 2018-08-09 | Full-drift-diameter cross-isolation lower-return-hole-testing combined pipe column and operation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810900643.XA CN109025915B (en) | 2018-08-09 | 2018-08-09 | Full-drift-diameter cross-isolation lower-return-hole-testing combined pipe column and operation method thereof |
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| Publication Number | Publication Date |
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| CN109025915A CN109025915A (en) | 2018-12-18 |
| CN109025915B true CN109025915B (en) | 2020-11-13 |
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| CN201810900643.XA Active CN109025915B (en) | 2018-08-09 | 2018-08-09 | Full-drift-diameter cross-isolation lower-return-hole-testing combined pipe column and operation method thereof |
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| CN114922613A (en) * | 2021-02-02 | 2022-08-19 | 中国石油天然气股份有限公司 | Naked eye testing equipment and naked eye testing method |
| CN115126451B (en) * | 2022-06-30 | 2023-11-17 | 川南航天能源科技有限公司 | Steel wire throwing and fishing ignition system |
| CN117211693B (en) * | 2023-11-08 | 2024-02-06 | 山东成林石油工程技术有限公司 | Oil well jet flow test and water shutoff finding combined pipe column and use method |
| CN117868803A (en) * | 2024-03-13 | 2024-04-12 | 中石化西南石油工程有限公司 | Four-combined test pipe column suitable for ultra-deep well oil and gas well and use method thereof |
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