CN113464118A - Down-thrust sidewall contact device and method for acoustic logging instrument - Google Patents
Down-thrust sidewall contact device and method for acoustic logging instrument Download PDFInfo
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- CN113464118A CN113464118A CN202110912318.7A CN202110912318A CN113464118A CN 113464118 A CN113464118 A CN 113464118A CN 202110912318 A CN202110912318 A CN 202110912318A CN 113464118 A CN113464118 A CN 113464118A
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000000712 assembly Effects 0.000 claims abstract description 22
- 238000000429 assembly Methods 0.000 claims abstract description 22
- 238000005259 measurement Methods 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 34
- 239000004568 cement Substances 0.000 description 9
- 238000012856 packing Methods 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 5
- 239000000523 sample Substances 0.000 description 5
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
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- 238000012360 testing method Methods 0.000 description 3
- 230000005465 channeling Effects 0.000 description 2
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- 238000004519 manufacturing process Methods 0.000 description 2
- 238000013441 quality evaluation Methods 0.000 description 2
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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
- E21B47/00—Survey of boreholes or wells
- E21B47/005—Monitoring or checking of cementation quality or level
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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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
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Abstract
The invention relates to a pushing device and a method for a sonic logging instrument, which comprises the following steps: a guide shaft; the upper flange part and the lower flange part are sleeved on the guide shaft, the upper flange part is connected to the top of the guide shaft in a sliding mode, the lower flange part is fixedly connected to the bottom of the guide shaft, and the upper flange part can move close to and far away from the lower flange part under the action of external force; and a plurality of hinge assemblies respectively connected to the upper flange part and the lower flange part in a hinged manner, wherein the hinge assembly positioned on the upper flange part and the hinge assembly positioned on the lower flange part are constructed into a group of hinge assemblies. The articulated subassembly in groups is used for articulating with the both ends of the transmission measuring arm of acoustic logging instrument, and the articulated subassembly sets up into: when the upper flange part moves away from the lower flange part, the emission measuring arm can move close to the guide shaft; the launch measurement arm is capable of moving away from the guide shaft when the upper flange portion moves along the lower flange portion. The lower pushing device can be suitable for model wells with different sizes.
Description
Technical Field
The invention belongs to the technical field of oil and gas well cementation quality evaluation, and particularly relates to a downward pushing device and a method for an acoustic logging instrument.
Background
Well cementation is a key link for well construction of oil and gas wells and is also a key point for ensuring the production life of the oil and gas wells. The well cementation quality has very important significance for the construction of exploration and development benefits and development capacity of oil and gas fields. If the cementing quality is evaluated incorrectly, it may result in incorrect analysis of the formation testing data and production dynamics, thereby delaying hydrocarbon reservoir discovery or causing unnecessary, expensive and time-consuming operations of channeling checking and squeeze cementing.
The fundamental objective of the well cementation quality evaluation is to evaluate the interlayer packing performance of the cement sheath. With the advancing military of the oil and gas exploration and development in the difficult fields of forward deep well ultra-deep well, low hole seepage, high temperature and high pressure, deep water, low stratum fracture pressure and the like, the evaluation of the interlayer packing performance of the cement sheath becomes increasingly important. At present, the widely used cement sheath interlayer packing evaluation experience chart is obtained from channeling test data forty years ago, is local experience of an oil field, and is often inaccurate in evaluation. Due to the limitation of experimental means and expenses and too many subjects involved in theoretical research, systematic research on a cement sheath packing evaluation method has not been carried out so far.
In order to research an evaluation method of the packing performance between cement rings, high-temperature and high-pressure full-size model well equipment is developed, and a six-arm acoustic logging instrument (a sector cement bond acoustic logging instrument) is planned to be put into a model well casing to evaluate the packing performance of the cement rings under different conditions. Because the height of the high-temperature high-pressure full-size model well equipment is small, the size of a lowering and pushing tool of a six-arm acoustic logging instrument (a sector cement bond acoustic logging instrument) used on site is large, the length of the lowering and pushing tool exceeds the length of a high-temperature high-pressure full-size model well in a laboratory, and the lowering and pushing tool cannot be directly used on site.
Disclosure of Invention
In order to solve all or part of the problems, the invention aims to provide a pushing device for a sonic logging instrument, so that the pushing device can be suitable for use of model wells with different sizes, and the influence of overlarge size of a pushing tool used in a field is reduced.
According to a first aspect of the present invention there is provided a tripping backup device for a sonic logging tool, comprising: a guide shaft; the upper flange part and the lower flange part are sleeved on the guide shaft, the upper flange part is connected to the top of the guide shaft in a sliding mode, the lower flange part is fixedly connected to the bottom of the guide shaft, and the upper flange part can move close to and far away from the lower flange part under the action of external force; and a plurality of hinge assemblies respectively hinged to the upper flange portion and the lower flange portion. Wherein, the hinge assembly that is located upper flange portion and the hinge assembly that is located lower flange portion set up one by one from top to bottom to the structure is hinge assembly in groups. Wherein, it is articulated with the both ends of the transmission measuring arm of acoustic logging instrument that articulated components are used for in groups, and articulated components sets up: when the upper flange part moves away from the lower flange part, the emission measuring arm can move close to the guide shaft; the launch measurement arm is capable of moving away from the guide shaft when the upper flange portion moves along the lower flange portion.
Further, go up flange portion and lower flange portion and all include the flange body and form a plurality of hinge base that is used for connecting articulated subassembly on the periphery wall of flange body, the flange body is used for the cover to establish on the guiding axle, a plurality of hinge base sets up top layer and bottom at the flange body along the axial distribution of guiding axle, wherein, the hinge base of top layer and the crisscross setting of the hinge base of bottom along the circumference of flange body, the hinge base of the top layer of one of the two of upper flange portion and lower flange portion constitutes articulated subassembly in groups with the hinge base of the bottom of the other one.
Furthermore, the hinge bases on the top layer and the bottom layer are uniformly distributed at equal angles along the circumferential direction of the flange body.
Further, the number of the hinge bases of the top layer and the number of the hinge bases of the bottom layer are three or four.
Further, the hinge base includes two upright walls that link to each other and follow vertical direction parallel arrangement with the outer wall of flange body, and articulated subassembly includes plate-like body, and plate-like body's both ends are formed with the through-hole respectively, and two through-holes are connected emission measuring arm and two upright walls through the pivot respectively to make emission measuring arm pass through plate-like body and flange body articulated.
Further, the upper flange part, the lower flange part, the plate-shaped body and the rotating shaft are made of metal or plastic.
Further, the upper flange part, the lower flange part, the plate-shaped body and the rotating shaft are made of stainless steel.
Furthermore, an external thread structure is formed on the outer peripheral wall of the guide shaft, through channels are formed in the upper flange part and the lower flange part in the axial direction, and the channels are used for forming sliding fit with the guide shaft. Wherein, the top section in the passageway of lower flange portion is formed with the internal thread structure, and the internal thread structure forms threaded connection with the external thread structure.
Further, the pushing device comprises a hexagonal nut which is connected to the guide shaft in a threaded mode and located above the upper flange portion.
According to a second aspect of the present invention, a method for pushing a tool by lowering is provided, which applies the pushing device, and comprises the following steps: before the acoustic logging instrument is put into the casing, the upper flange part is kept still, and the guide shaft is pushed to move downwards so as to drive the lower flange part to move downwards, so that the emission measuring arm can move close to the guide shaft; the acoustic logging instrument is put into the casing, and the push-in and push-against device and the acoustic logging instrument are positioned at preset positions in the casing; the pulling guiding shaft moves upwards to drive the lower flange part to move upwards, so that the upper flange part and the lower flange part move oppositely, the emission measuring arm can move away from the guiding shaft, and the emission measuring arm moves towards the inner wall of the sleeve and is attached to the inner wall of the contact sleeve.
According to the technical scheme, the size of the cross section of the overall structure including the launching measuring arm can be changed, so that the device can be suitable for model wells with different sizes, and the influence that a pushing tool used on site is too large in size and cannot be used is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a tripping device for an acoustic tool according to an embodiment of the present invention, showing the connection of the tripping device to a launch measurement arm;
FIG. 2 is a diagram showing the positional relationship and the transceiving relationship of each transmitting measuring arm after the pushing device completes the pushing process of the acoustic logging instrument;
FIG. 3 is a schematic structural view of the upper flange portion shown in FIG. 1;
FIG. 4 is a view in the direction A-A of the upper flange portion shown in FIG. 3;
FIG. 5 is a view in the direction B-B of the upper flange portion shown in FIG. 3;
FIG. 6 is a schematic view of the lower flange portion of FIG. 1;
FIG. 7 is a view in the direction C-C of the lower flange portion shown in FIG. 6;
FIG. 8 is a view in the direction D-D of the lower flange portion shown in FIG. 6;
FIG. 9 is a schematic structural view of a plate-shaped body of the hinge assembly shown in FIG. 1;
FIG. 10 is a schematic view of a rotating shaft of the hinge assembly shown in FIG. 1;
FIG. 11 is a flow chart of a method of plunge sidewall for an acoustic tool in accordance with an embodiment of the present invention.
Detailed Description
For a better understanding of the objects, structure and function of the invention, a downhole sidewall contact apparatus for an acoustic tool of the present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 illustrates the structure of a plunge backup device 100 for a sonic tool in accordance with an embodiment of the invention. As shown in fig. 1, the push-down device 100 includes: a guide shaft 1; the upper flange part 2 and the lower flange part 3 are sleeved on the guide shaft 1, the upper flange part 2 is connected to the top of the guide shaft 1 in a sliding mode, the lower flange part 3 is fixedly connected to the bottom of the guide shaft 1, and the upper flange part 2 can move close to and far away from the lower flange part 3 under the action of external force; and a plurality of hinge assemblies 4 respectively hingedly connected to the upper flange part 2 and the lower flange part 3. Wherein the hinge assemblies 4 located at the upper flange part 2 and the hinge assemblies 4 located at the lower flange part 3 are arranged one above the other to be configured as a set of hinge assemblies 4. Wherein, the articulated components 4 in groups are used for articulating with the both ends of the transmission measuring arm A0 of acoustic logging instrument, and articulated components 4 set up to: when the upper flange part 2 moves away from the lower flange part 3, the emission measuring arm a0 can move close to the guide shaft 1; when the upper flange part 2 moves closer to the lower flange part 3, the emission measuring arm a0 can move away from the guide shaft 1.
The sonic tool referred to in this application should be understood as having a plurality of transmitting measurement arms a0, which may be, for example, a six-arm sonic tool or an eight-arm sonic tool. Reference herein to the transmitting measuring arm a0 should be understood to be disposed with acoustic transmitting and receiving probes thereon, and the adjacently disposed transmitting measuring arm a0 should be understood to have a transceive relationship (as shown in connection with fig. 2). The guide shaft 1 mentioned in this application is to be understood as a smooth cylindrical shaft (shown in connection with fig. 10), the shaft diameter and length of which can be adjusted as the case may be. The upper flange part 2 and the lower flange part 3 mentioned in this application are to be understood as having an integral flange structure, the dimensions of the upper flange part 2 and the lower flange part 3 being adjustable as the case may be. The hinge assembly 4 referred to in this application should be understood as a component having a hinge function, the dimensions of the hinge assembly 4 being adjustable according to the dimensions of the model well casing. The group of hinge assemblies 4 referred to in this application should be understood as a single launch measurement arm A0 with the hinge assemblies 4 on the upper flange portion 2 and the hinge assemblies 4 on the lower flange portion 3 connected, the length of the single launch measurement arm A0 being oriented vertically.
When the push-down device 100 of the embodiment of the invention is used, after being assembled according to the connection relationship of the components, the push-down device is hinged with two ends of a transmitting measuring arm A0 of the acoustic logging instrument through the grouped hinge assemblies 4. Before the acoustic logging instrument is set into a casing, the upper flange part 2 is kept still, the guide shaft 1 is pushed to move downwards, so that the lower flange part 3 is driven to move downwards, the upper flange part 2 and the lower flange part 3 form stretching on the group of hinge assemblies 4, and therefore the launching measuring arm A0 can move close to the guide shaft 1, and at the moment, the size of the whole cross section of the lower pushing device 100 including the launching measuring arm A0 is reduced. In this way, the acoustic tool can be more easily run into the interior of the casing by reducing the space occupied laterally. The running backup device 100 and acoustic tool are then positioned at a predetermined location within the casing of the model well (i.e., a test site between the cement sheath layers). Finally, the guide shaft 1 is pulled to move upwards to drive the lower flange part 3 to move upwards, the upper flange part 2 and the lower flange part 3 move towards each other to form an outward push of the group of hinge assemblies 4, so that the emission measuring arm A0 can move away from the guide shaft 1 until the emission measuring arm A0 is attached to and contacted with the inner wall of the casing, and the pushing process of the acoustic logging instrument is completed.
With the arrangement, the push-down device 100 of the embodiment of the invention can adapt to the use of model wells with different sizes by changing the size of the cross section of the whole structure including the launching measuring arm A0, and reduce the influence of oversize push-down tools used in the field.
Referring to fig. 2, fig. 2 shows the distribution of the six-arm sonic logging tool after the push-down device 100 of the embodiment of the invention is applied to the push-down of the six-arm sonic logging tool. A1, A2, A3, A4, A5 and A6 are transmitting measuring arms of 6 sonic logging instruments respectively, T1, T2, T3, T4, T5 and T6 are sonic transmitting probes respectively, R1, R2, R3, R4, R5 and R6 are sonic receiving probes respectively, and arrows show a sonic transmitting and receiving relation.
In the preferred embodiment shown in fig. 3 to 8, each of the upper flange portion 2 and the lower flange portion 3 may include a flange body (21 and 31) and a plurality of hinge bases (22 and 32) formed on an outer peripheral wall of the flange body (21 and 31) for connecting the hinge assembly 4, the flange body (21 and 31) being configured to be fitted over the guide shaft 1, and the plurality of hinge bases (22 and 32) being disposed on top and bottom layers of the flange body (21 and 31) in an axial direction of the guide shaft 1. Wherein the hinge bases (22 and 32) of the top layer and the hinge bases (22 and 32) of the bottom layer are staggered along the circumferential direction of the flange bodies (21 and 31), and the hinge bases (22 and 32) of the top layer and the hinge bases (22 and 32) of the bottom layer of one of the upper flange part 2 and the lower flange part 3 and the hinge bases (22 and 32) of the bottom layer of the other are configured into a group hinge assembly 4.
The distributed arrangement of the plurality of hinge bases (22 and 32) mentioned in the present application is to be understood as the division of the plurality of hinge bases (22 and 32) into two equal parts, one part being distributed evenly and at intervals on the top layer of the flange bodies (21 and 31) and the other part being distributed evenly and at intervals on the bottom layer of the flange bodies (21 and 31), the top layer and the bottom layer being formed on the peripheral wall of the flange bodies (21 and 31), which is to be understood in particular as the layer of hinge bases (22 and 32) which evenly and at intervals distributes the hinge bases (22 and 32). The staggered arrangement referred to in this application should be understood as a number of hinge bases (22 and 32) viewed in a top view, the hinge bases (22 and 32) of the top and bottom layers being viewed sequentially and equally spaced. The distance between the top and bottom hinge bases (22 and 32) referred to in this application can be adjusted according to the specific transceiving distances of the acoustic wave transmitting probe and the acoustic wave receiving probe of the transmitting measuring arm a 0. The hinge bases (22 and 32) of the upper and lower flange portions 2 and 3 referred to in this application are configured as a set of articulated assemblies 4, which should be understood as meaning the connection of adjacent individual emission measuring arms a 0: two ends of one of the emission measuring arms a0 are respectively connected to the hinge bases (22 and 32) on the top layer of the upper flange part 2 and the hinge bases (22 and 32) on the bottom layer of the lower flange part 3, and two ends of the other emission measuring arm a0 are respectively connected to the hinge bases (22 and 32) on the bottom layer of the upper flange part 2 and the hinge bases (22 and 32) on the top layer of the lower flange part 3, so as to form a staggered arrangement mode as shown in fig. 2.
In a preferred embodiment, the hinge bases (22 and 32) of the top layer and the hinge bases (22 and 32) of the bottom layer can be uniformly distributed at equal angles along the circumferential direction of the flange bodies (21 and 31). Preferably, the number of the hinge bases (22 and 32) of the top layer and the hinge bases (22 and 32) of the bottom layer can be three or four. Further preferably, the hinge bases (22 and 32) of the top layer and the hinge bases (22 and 32) of the bottom layer may be spaced at intervals of 60 ° or 45 ° along the circumferential direction of the flange bodies (21 and 31).
The circumferential direction of the flange bodies (21 and 31) mentioned in the present application is to be understood as the circumferential direction of the flange structure in which the flange bodies (21 and 31) are of a complete cylindrical structure. The number of top hinge bases (22 and 32) and bottom hinge bases (22 and 32) referred to in this application can be three or four and should be understood to be suitable for use with a six-armed sonic logging instrument or an eight-armed sonic logging instrument. The hinge bases (22 and 32) of the top layer and the hinge bases (22 and 32) of the bottom layer mentioned in the present application may be distributed at intervals of 60 ° or 45 ° along the circumferential direction of the flange bodies (21 and 31) and should be understood as angles of the hinge bases (22 and 32) of the top layer and the hinge bases (22 and 32) of the bottom layer on a horizontal plane.
As shown in fig. 4 and 7, the hinge bases (22 and 32) may include two standing walls (221 and 321) connected to the outer walls of the flange bodies (21 and 31) and arranged in parallel in the vertical direction, and as shown in fig. 9 and 10, the hinge assembly 4 may include a plate-shaped body 41, through holes 42 are formed at both ends of the plate-shaped body 41, respectively, and the two through holes 42 connect the emission measuring arm a0 and the two standing walls (221 and 321) through the rotation shaft 43, respectively, so that the emission measuring arm a0 is hinged to the flange bodies (21 and 31) through the plate-shaped body 41.
In a preferred embodiment, the materials of the upper flange part 2, the lower flange part 3, the plate-shaped body 41 and the rotating shaft 43 are metal or plastic. Wherein the metal or plastic of the plate-like body 41 may be selected of a material having sufficient strength to connect and support the emission measuring arm a 0. The metal or plastic of the shaft 43 may be selected to have sufficient strength to attach the hinge assembly 4. The metal or plastic of the upper flange part 2 can be chosen to have sufficient strength to enable run-in and push-against. The metal or plastic of the lower flange portion 3 may be selected to have sufficient strength to effect run in and push against. In a preferred embodiment, the material of the upper flange part 2, the lower flange part 3, the plate-shaped body 41 and the rotation shaft 43 may be stainless steel. Preferably high strength stainless steel.
Returning to fig. 1, an external thread structure 11 may be formed on the outer circumferential wall of the guide shaft 1, and a through passage may be formed in each of the upper flange portion 2 and the lower flange portion 3 in the axial direction, and the through passage is configured to form a sliding fit with the guide shaft 1. Wherein, the top section in the channel of the lower flange part 3 is formed with an internal thread structure 33, and the internal thread structure 33 forms a threaded connection with the external thread structure 11. Through this setting, lower flange portion 3 forms threaded connection back through internal thread structure 33 and external thread structure 11 when the installation to make lower flange portion 3 fixed with guiding axle 1, install convenient and fast more like this, easy operation.
In the preferred embodiment shown in fig. 1, the push-down device 100 may further include a hexagonal nut 5 screwed on the guide shaft 1 and located above the upper flange portion 2. In combination with the above, in a specific use, before the sleeve is put into the sleeve, the hexagon nut 5 is rotated counterclockwise, so that the hexagon nut 5 moves upward along the guide shaft 1, and when the guide shaft 1 is pushed to move downward, the hexagon nut 5 can limit the upper flange part 2 to a certain extent, so as to prevent the upper flange part 2 from being separated from the guide shaft 1; after the acoustic logging instrument is put into a preset position in the sleeve, the hexagon nut 5 is rotated clockwise, so that the hexagon nut 5 moves downwards along the long shaft with the external threads, the upper flange part 2 is limited and fixed by the hexagon nut 5, and the stability of the attached contact of the emission measuring arm A0 is improved.
FIG. 11 shows a flow diagram of a method 200 for downhole sidewall contact of a sonic tool in accordance with an embodiment of the present invention. As shown in fig. 11, the step of the push-down method 200 using the push-down device 100 includes: s01, before the acoustic logging instrument is put into the casing, the upper flange part 2 is kept still, the guide shaft 1 is pushed to move downwards, so that the lower flange part 3 is driven to move downwards, and the emission measuring arm A0 can move close to the guide shaft 1; s02, the acoustic logging instrument is lowered into the casing, and the lowering and pushing device 100 and the acoustic logging instrument are located at preset positions in the casing; and S03, pulling the guide shaft 1 to move upwards to drive the lower flange part 3 to move upwards, so that the upper flange part 2 and the lower flange part 3 move towards each other, so that the emission measuring arm A0 can move away from the guide shaft 1 until the emission measuring arm A0 moves towards the inner wall of the sleeve and is attached to and contacted with the inner wall of the sleeve.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "upper," "lower," "vertical," "horizontal," "top," "bottom," "outer," "clockwise," "counterclockwise," "axial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A downhole sidewall contact apparatus for a sonic tool, comprising:
a guide shaft;
the upper flange part and the lower flange part are sleeved on the guide shaft, the upper flange part is connected to the top of the guide shaft in a sliding mode, the lower flange part is fixedly connected to the bottom of the guide shaft, and the upper flange part can move close to and away from the lower flange part under the action of external force; and
the hinge assemblies are respectively hinged to the upper flange part and the lower flange part, wherein the hinge assemblies positioned on the upper flange part and the hinge assemblies positioned on the lower flange part are arranged up and down in a one-to-one opposite mode to form a group of hinge assemblies;
wherein the set of hinge assemblies is adapted to articulate with both ends of an emission measurement arm of an acoustic logging tool, the hinge assemblies configured to: when the upper flange part moves away from the lower flange part, the emission measuring arm can move close to the guide shaft; when the upper flange portion moves closer to the lower flange portion, the launch measurement arm can move away from the guide shaft.
2. The plunge sidewall contact device according to claim 1, wherein the upper flange portion and the lower flange portion each include a flange body and a plurality of hinge bases formed on an outer peripheral wall of the flange body for connecting the hinge assemblies, the flange body is configured to be fitted over the guide shaft, the hinge bases are distributed along an axial direction of the guide shaft and disposed on a top layer and a bottom layer of the flange body, wherein the hinge bases of the top layer and the hinge bases of the bottom layer are staggered along a circumferential direction of the flange body, and the hinge bases of the top layer of one of the upper flange portion and the lower flange portion and the hinge bases of the bottom layer of the other one of the upper flange portion and the lower flange portion are configured as the set of hinge assemblies.
3. The push-down device according to claim 2, wherein the hinge bases of the top layer and the bottom layer are evenly distributed in the circumferential direction of the flange body at equal angles.
4. The step down pushing device of claim 3, wherein the number of the hinge bases of the top layer and the bottom layer is three or four.
5. The push-down device according to any one of claims 2-4, wherein the hinge base comprises two vertical walls connected with the outer wall of the flange body and arranged in parallel in the vertical direction, and the hinge assembly comprises a plate-shaped body, through holes are formed at two ends of the plate-shaped body respectively, and the two through holes are connected with the emission measuring arm and the two vertical walls through rotating shafts respectively, so that the emission measuring arm is hinged with the flange body through the plate-shaped body.
6. The push-down device of claim 5, wherein the material of the upper flange portion, the lower flange portion, the plate-like body, and the shaft is metal or plastic.
7. The step down thrust device of claim 6, wherein the material of the upper flange portion, the lower flange portion, the plate-like body, and the shaft is stainless steel.
8. A downhole sidewall contact device according to any of claims 1-4, wherein the outer circumferential wall of the guiding shaft is formed with an external thread structure, and the upper flange part and the lower flange part are each formed with a through passage in the axial direction for forming a sliding fit with the guiding shaft, wherein a top section in the passage of the lower flange part is formed with an internal thread structure, and the internal thread structure forms a threaded connection with the external thread structure.
9. The push-down device according to claim 8, further comprising a hexagonal nut threaded onto the guide shaft and located above the upper flange portion.
10. A method of plunge sidewall for a sonic tool, applying a plunge sidewall apparatus according to any of claims 1-9, the steps comprising:
before the acoustic logging instrument is put into a casing, the upper flange part is kept still, the guide shaft is pushed to move downwards, so that the lower flange part is driven to move downwards, and the emission measuring arm can move close to the guide shaft;
running the acoustic logging instrument into the casing, and enabling the run-in sidewall contact device and the acoustic logging instrument to be located at preset positions in the casing;
the guide shaft is pulled to move upwards so as to drive the lower flange part to move upwards, so that the upper flange part and the lower flange part move oppositely, the emission measuring arm can move away from the guide shaft, and the emission measuring arm moves towards the inner wall of the sleeve and is attached to and in contact with the inner wall of the sleeve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110912318.7A CN113464118A (en) | 2021-08-10 | 2021-08-10 | Down-thrust sidewall contact device and method for acoustic logging instrument |
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| CN202110912318.7A CN113464118A (en) | 2021-08-10 | 2021-08-10 | Down-thrust sidewall contact device and method for acoustic logging instrument |
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Citations (12)
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