CN217327287U - Oil gas well surface casing detection device - Google Patents
Oil gas well surface casing detection device Download PDFInfo
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- CN217327287U CN217327287U CN202221270770.4U CN202221270770U CN217327287U CN 217327287 U CN217327287 U CN 217327287U CN 202221270770 U CN202221270770 U CN 202221270770U CN 217327287 U CN217327287 U CN 217327287U
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Abstract
The utility model relates to an oil gas well surface casing detection device, which comprises a pipe body, wherein two ends of the pipe body are respectively provided with a guide ring, and the guide rings and the pipe body are coaxially arranged; the two arc-shaped clamping pieces are oppositely arranged in the pipe body, and a circular channel formed between the two clamping pieces is coaxial with the pipe body; the linear displacement mechanism is arranged on one side of the pipe body, which is deviated from each other, of the two clamping pieces, the fixed piece of the linear displacement mechanism is connected with the pipe body, and the movable piece of the linear displacement mechanism is connected with the clamping pieces and is used for driving the clamping pieces to move along the radial direction of the pipe body; the diameter of two holder inner walls is greater than the internal diameter of guide ring, the utility model discloses a tip at the body sets up the guide ring, and the internal diameter of guide ring is less than the diameter of the circular passageway that forms between two grip blocks, and when using, the guide ring leads for the sleeve pipe, makes the sleeve pipe get into smoothly and pass in the middle of two grip blocks, makes the sleeve pipe pass from the intermediate position of two grip blocks more accurately through setting up spacing clamping piece.
Description
Technical Field
The utility model relates to a top layer sleeve pipe check out test set technical field, in particular to oil gas well top layer sleeve pipe detection device.
Background
In the oil gas exploitation work, the surface casing is outermost sleeve pipe in the oil gas well casing procedure, and the use of surface casing is important accessory structure, and surface casing's effect has: isolating the upper aquifer, so that ground water and surface groundwater cannot permeate into the shaft; protecting the well mouth and reinforcing the well wall of the surface soil layer well section; for drilling to continue to encounter high pressure hydrocarbon reservoirs, blowout preventers are installed on the surface casing to prevent blowouts. During construction, the gap between the surface casing and the well wall is sealed with cement, i.e. during cementing, cement slurry needs to return out of the well mouth to isolate the stratum and protect the well wall.
In the processing work of the surface casing, in order to ensure the quality requirement of the surface casing, a related detection device is required to be used, but the existing partial detection device still has certain defects when being used.
When the oil gas well surface casing pipe detects, at first will fix a position the sleeve pipe, some devices that have now carry out the centre gripping location to sheathed tube both ends through clamping device usually, have blockked the detection to the sleeve pipe tip, also make things convenient for detection device to get into sheathed tube inside from sheathed tube tip to also blockked the detection to the intraduct.
The length of the surface casing pipe is generally tens of meters to hundreds of meters, when the middle position of the outer peripheral surface of the casing pipe is clamped and positioned, in order to position more accurately, the end part of the casing pipe needs to pass through the clamping and positioning device, and when the length of the casing pipe is long, a worker can hardly directly align the middle position of the clamping and positioning device to pass through the casing pipe.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving and carrying out the centre gripping location to sheathed tube outer peripheral face intermediate position, generally need pass sheathed tube tip from the centre gripping positioner, when the sheathed tube length in top layer is longer, the problem that the intermediate position of hardly direct alignment centre gripping positioner passed from it provides an oil gas well top layer sleeve pipe detection device.
The utility model provides a pair of oil gas well top layer sleeve pipe detection device, include:
a pipe body, two ends of which are coaxially sleeved with a guide ring respectively;
the two arc-shaped clamping pieces are oppositely arranged in the pipe body, and a circular channel formed between the two clamping pieces is coaxial with the pipe body;
and the linear displacement mechanism is connected with the fixed piece and the clamping piece and is used for driving the clamping piece to move along the radial direction of the pipe body.
Preferably, the inboard circumference equipartition along the guide ring of guide ring is provided with a plurality of spacing clamping pieces, and one side that the body was kept away from to the spacing clamping piece of one of them guide ring inboard is articulated with the inner wall of guide ring, and one side that the inboard spacing clamping piece of another guide ring is close to the body is articulated with the inner wall of guide ring, and the one side that spacing clamping piece deviates from the hinged end is connected with the inner wall of guide ring through the elastic component.
Preferably, the inner wall of the guide ring is fixedly provided with an ear plate, and the ear plate is rotatably connected with the limiting clamping piece.
Preferably, a plurality of holding tanks have been seted up to the inner wall of guide ring, and it is provided with the gag lever post to slide in the holding tank, is provided with first elastic component in the holding tank, first elastic component one end and gag lever post fixed connection, the inner wall fixed connection of one end and holding tank in addition, the outer end fixedly connected with second elastic component of gag lever post, one side fixed connection that the hinged end was kept away from to the one end that the gag lever post was kept away from to the second elastic component and spacing clamping piece.
Preferably, the linear displacement mechanism comprises a screw rod, the length direction of the screw rod is arranged along the radial direction of the pipe body, the screw rod penetrates through the pipe wall of the pipe body and is in threaded connection with the pipe wall, one end, located in the pipe body, of the screw rod is rotatably connected with the clamping piece, one end, deviating from the clamping piece, of the screw rod is fixedly connected with a handheld portion, and a limiting structure is arranged between the clamping piece and the pipe body.
Preferably, the limiting structure comprises a guide groove which is formed in the circumferential surface of the pipe body, the direction of the guide groove is the same as the length direction of the screw rod, a guide rod is arranged in the guide groove in a sliding mode, and one end, located in the pipe body, of the guide rod is connected with the clamping piece.
Preferably, the guide bar deviates from the one end of holder and is connected with the instruction piece, and the outer wall of body is fixed and is provided with the scale plate, and the length direction of scale plate is the same with the moving direction of guide bar for observe the height of instructing the piece.
Preferably, still include bearing structure, it includes the mount pad, sets up in the both sides of body, with the outer peripheral face fixed connection of body, and the mounting groove has been seted up to one side that the mount pad deviates from the body, is provided with the locating piece in the mounting groove, and the locating piece is dismantled with the mount pad and is connected, the locating piece deviates from the backup pad of the vertical setting of one side fixedly connected with of body.
Preferably, the bottom of the supporting plate is provided with a sliding groove, a sliding plate is arranged in the sliding groove, a third elastic part is arranged in the sliding groove, one end of the third elastic part is fixedly connected with the inner wall of the sliding groove, the other end of the third elastic part is fixedly connected with the sliding plate, and the bottom of the sliding plate is fixedly connected with a bottom plate.
Preferably, the bottom of the bottom plate is provided with a non-slip mat.
Compared with the prior art, the utility model provides a pair of oil gas well top layer sleeve pipe detection device, its beneficial effect is:
1. the utility model discloses a tip at the body sets up the guide ring, and the internal diameter of guide ring is less than the diameter of the circular passageway that forms between two grip blocks, and when using, the guide ring leads for the sleeve pipe, makes the sleeve pipe accurately get into and pass in the middle of two grip blocks.
2. The utility model discloses a two guide rings tentatively fix a position the sleeve pipe, make the sleeve pipe pass from the intermediate position of two grip blocks more accurately through setting up spacing clamping piece.
3. The utility model discloses when the sleeve pipe penetrates between two holders in the body, drive two holders through rotating the screw rod and remove in opposite directions, realized having loosened the screw rod and can having removed the sleeve pipe to sheathed tube centre gripping location when needs detect other positions, trade a centre gripping position and carry out the centre gripping location and can realize detecting sheathed tube comprehensively.
4. The utility model discloses the setting of sliding plate, bottom plate and slipmat is passed through to the bottom of well backup pad, through the non-skid property of slipmat to add the anti-skidding stability when the device uses, and through the setting of third elastic component, can add the spacing cushioning nature of backup pad activity, add the stability of whole device when the device uses then.
Drawings
Fig. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic sectional view of the tube body structure of the present invention;
fig. 3 is a schematic view of the supporting structure of the present invention;
fig. 4 is a schematic cross-sectional view of the structure of the guide ring according to the present invention.
Description of reference numerals:
1. a pipe body; 2. a mounting seat; 3. a guide ring; 4. a screw; 5. a hand-held portion; 6. a clamping member; 7. a guide bar; 8. an indication block; 9. positioning blocks; 10. a support plate; 11. a sliding plate; 12. an ear plate; 13. a limiting clamping piece; 14. a scale plate; 15. fixing the bolt; 16. a base plate; 17. a non-slip mat; 18. a third elastic member; 19. accommodating grooves; 20. a limiting rod; 21. a first elastic member.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings 1-4, but it should be understood that the scope of the present invention is not limited by the following detailed description.
Example 1
As shown in fig. 1 and 2, the oil and gas well surface casing detection device provided by the utility model comprises a pipe body 1, two ends of the pipe body 1 are respectively provided with a guide ring 3, and the guide rings 3 and the pipe body 1 are coaxially arranged; the two arc-shaped clamping pieces 6 are oppositely arranged in the pipe body 1, and a circular channel formed between the two clamping pieces 6 is coaxial with the pipe body 1; the linear displacement mechanism is arranged on one side of the pipe body 1, which is deviated from each other, of the two clamping pieces 6, the fixed piece of the linear displacement mechanism is connected with the pipe body 1, and the movable piece of the linear displacement mechanism is connected with the clamping pieces 6 and is used for driving the clamping pieces 6 to move along the radial direction of the pipe body 1; the inner diameters of the two clamping pieces 6 are larger than that of the guide ring 3, so that when the sleeve enters the tube body 1 from the guide ring 3, the side surfaces of the clamping pieces 6 do not block the sleeve.
In this embodiment, through set up the guide ring at the tip of body 1, lead for the sleeve pipe, make the sleeve pipe get into between two grip blocks 6 more accurately, pass smoothly between two grip blocks 6, two grip blocks 6 drive through straight line displacement mechanism and carry out the centre gripping to sheathed tube global, simultaneously, to sheathed tube centre gripping mode for global centre gripping, can make check out test set follow sheathed tube tip entering sheathed tube inside in this embodiment.
When the sheathed tube length is longer, according to actual need, can set up a plurality of bodys 1 and carry out the centre gripping to sheathed tube global.
In order to enable the sleeve to enter the middle position of the two clamping plates 6 more accurately, as shown in fig. 4, a plurality of limiting clamping pieces 13 are uniformly distributed on the inner side of the guide ring 3 along the circumferential direction of the guide ring 3, one side of each limiting clamping piece 13 is hinged with the inner wall of the guide ring 3, and the other side of each limiting clamping piece is connected with the inner wall of the guide ring 3 through an elastic piece. The rotation direction of the limiting clamping piece 13 is the direction along the penetration of the sleeve.
In order to better realize the rotation of the limiting clamping piece 13, an ear plate 12 is fixedly arranged on the inner wall of the guide ring 3, a rotating shaft is arranged on the ear plate 12, and the hinged end of the limiting clamping piece 13 is connected with the rotating shaft.
Further, a plurality of holding tanks 19 have been seted up to the inner wall of guide ring 3, it is provided with gag lever post 20 to slide in the holding tank 19, be provided with first elastic component 21 in the holding tank 19, first elastic component 21 one end and gag lever post 20 fixed connection, the inner wall fixed connection of one end and holding tank 19 in addition, the outer end fixedly connected with second elastic component of gag lever post 20, the one end that gag lever post 20 was kept away from to the second elastic component is kept away from one side fixed connection of hinged end with spacing clamping piece 13.
The second elastic element mainly prevents the collar from being inserted when the angle between the limiting clamping piece 13 hinged on the top of the guide ring 3 and the inner wall of the guide ring 3 is too large.
After the guide ring 3 is inserted into the sleeve, under the resilience effect of the first elastic part 21 and the second elastic part, the sleeve is clamped in a limiting manner, the stability of the device in the detection process is increased, and the spring is selected by the first elastic part 21 and the second elastic part.
In this embodiment, linear displacement mechanism includes screw rod 4, and its length direction sets up along the radial of body 1, and screw rod 4 passes the pipe wall of body 1 and with pipe wall threaded connection, and screw rod 4 is located the one end of body 1 and rotates with holder 6 and be connected, and screw rod 4 deviates from the handheld portion 5 of one end fixedly connected with of holder 6, and the rolling disc is selected to handheld portion 5, is provided with limit structure between holder 6 and the body 1.
When the sleeve clamping device is used, the rotating disc is rotated to drive the screw rod 4 to rotate, and the screw rod 4 rotates and drives the clamping piece 6 to move oppositely to clamp the sleeve.
Wherein, limit structure includes the guide way, sets up at body 1 global, and the direction of guide way is the same with the length direction of screw rod 1, and the guide bar 7 that slides in the guide way is provided with, and guide bar 7 is located the one end and the holder 6 of body 1 and is connected.
The guide rod 7 is installed and connected in a plug-in connection mode, has certain limiting sliding performance, and then plays a limiting role in the movement of the clamping piece 6, so that the screw rod 4 can be rotated to play a limiting pushing role.
When using, guide ring 3 tentatively fixes a position the sleeve pipe, make the sleeve pipe pass from two guide ring 3 smoothly, make the sleeve pipe pass from the intermediate position of two grip blocks 6 more accurately through setting up spacing clamping piece 13, simultaneously, when the sleeve pipe penetrates two grip blocks 6 in the body 1 in the middle of, drive two grip blocks 6 and remove in opposite directions through rotating screw rod 4, realized the sheathed tube centre gripping location, spacing clamping piece 13 also has certain clamping action to the sleeve pipe simultaneously, increase the stability of sleeve pipe location.
Example 2
In this embodiment, in order to facilitate the sleeve to pass through the two guide rings 3 and reduce the workload of the worker, the setting direction of the limiting clamping pieces 13 is specifically limited, wherein one side of the limiting clamping piece 13 on the inner side of one guide ring 3, which is far away from the pipe body 1, is hinged to the inner wall of the guide ring 3, and one side of the limiting clamping piece 13 on the inner side of the other guide ring 3, which is close to the pipe body 1, is hinged to the inner wall of the guide ring 3.
In order to avoid the problem that the sleeve pipe passes through one guide ring 3 and is blocked by the bounced limit clip 13 when going to the position of the other guide ring 3, the limit clip 13 in the two guide rings 3 is arranged in the forward direction in the present embodiment, and when in use, the penetrating end of the sleeve pipe is: one end of the limiting clamping piece 13, which is far away from one side of the pipe body 1 and is hinged with the inner wall of the guide ring 3.
Example 3
As shown in fig. 4, the difference between the present embodiment and the above embodiments is that a plurality of receiving grooves 19 are formed in the inner wall of the guide ring 3, a limiting rod 20 is slidably disposed in the receiving groove 19, a first elastic member 21 is disposed in the receiving groove 19, one end of the first elastic member 21 is fixedly connected to the limiting rod 20, the other end of the first elastic member is fixedly connected to the inner wall of the receiving groove 19, an outer end of the limiting rod 20 is fixedly connected to a second elastic member, one end of the second elastic member far away from the limiting rod 20 is fixedly connected to one side of the limiting clamping piece 13 far away from the hinge end, and the first elastic member 21 and the second elastic member select a spring.
The second elastic element mainly prevents the collar from being inserted when the angle between the limiting clamping piece 13 hinged on the top of the guide ring 3 and the inner wall of the guide ring 3 is too large.
Considering the gravity action of the sleeve, the spring stiffness coefficient of the first elastic member 21 and the second elastic member at the bottom is set to be larger than the spring stiffness coefficient of the first elastic member 21 and the second elastic member at the top as required, so as to prevent the sleeve from being displaced downward toward the inside of the guide ring 3.
After the guide ring 3 is inserted into the sleeve, the elastic resilience effect of the first elastic part 21 and the second elastic part plays a role in limiting and clamping the sleeve, and then the stability of the device during detection is increased.
Example 4
As shown in fig. 2, the difference between the present embodiment and the above embodiments is that after the two clamping plates 6 clamp the sleeve, in order to conveniently and intuitively see whether the clamping plate 6 clamps the sleeve loosely, an indication block 8 is connected to one end of the guide rod 7 away from the clamping member 6, a scale plate 14 is fixedly disposed on the outer wall of the tube body 1, and the length direction of the scale plate 14 is the same as the moving direction of the guide rod 7, so as to observe the height of the indication block 8.
In order to more intuitively view the corresponding scale of the indication block 8, the scale plate 14 is made of transparent material.
When using, the tail end installation of guide bar 7 instructs piece 8, and a set of scale plate 14 is all installed to the top of body 1 and the position that the bottom corresponds guide bar 7, and scale plate 14 is located the guide bar 7 outside, and scale plate 14 corresponds each other with instructing between the piece 8, and the accessible instructs the observation of piece 8 and the 14 positions of scale plate, judges whether there is not hard up phenomenon after the sleeve pipe is fixed.
Example 5
As shown in fig. 3, in this embodiment, in order to fix the pipe body 1, the support structure further includes a mounting base 2, which includes a mounting base 2, and is disposed on two sides of the pipe body 1, and is fixedly connected to the outer peripheral surface of the pipe body 1, and a mounting groove is disposed on one side of the mounting base 2 away from the pipe body 1, and a positioning block 9 is disposed in the mounting groove, and the positioning block 9 is detachably connected to the mounting base 2 through a fixing bolt 15, and the positioning block 9 is connected to a support plate 10, which is vertically disposed, and is fixedly connected to one side of the positioning block 9 away from the pipe body 1.
In order to increase the stability of the whole structure, the bottom of the supporting plate 10 is provided with a sliding groove, a sliding plate 11 is arranged in the sliding groove, a third elastic member 18 is arranged in the sliding groove, one end of the third elastic member 18 is fixedly connected with the inner wall of the sliding groove, the other end of the third elastic member is fixedly connected with the sliding plate 11, the bottom of the sliding plate 11 is fixedly connected with a bottom plate 16, and the bottom of the bottom plate 16 is provided with an anti-skid pad 17.
The antiskid stability of the device during use is added through the antiskid property of the antiskid pad 17, the limiting buffering property of the movement of the support plate 10 can be added through the arrangement of the third elastic part 18, and the third elastic part 18 selects a spring.
The utility model provides a pair of oil gas well top layer sleeve pipe detection device, setting through body 1 and screw rod 4, the device is when using, the sleeve pipe that needs to detect passes guide ring 3 and inserts the inside of body 1, rotate screw rod 4 through handheld portion 5 after pegging graft, thereby under the auxiliary action of 7 slidabilities of guide bar, the spacing activity that can drive holder 6 through screw rod 4's rotation, then play the effect of centre gripping location to the sleeve pipe of pegging graft, setting through guide ring 3 and mount pad 2, spacing clamping piece 13 accessible axis of rotation carries out spacing rotation in the guide ring 3, and under the limiting displacement of gag lever post 20, gag lever post 20 receives the influence of first elastic component 21, certain spacing contractility has in holding tank 19, insert and play certain limiting displacement to the activity of spacing clamping piece 13.
To sum up, the utility model discloses the guide ring carries out preliminary location to the sleeve pipe, makes the sleeve pipe get into between two grip blocks more accurately, when the sleeve pipe penetrates between two holders in the body, drives two holders through rotating the screw rod and removes in opposite directions, has realized the sheathed tube centre gripping location, when needs detect other positions, can move the sleeve pipe, trades a centre gripping position and carries out the centre gripping location and can realize detecting sheathed tube comprehensively.
The above disclosure is only for the preferred embodiments of the present invention, however, the present invention is not limited thereto, and any changes that can be considered by those skilled in the art shall fall within the protection scope of the present invention.
Claims (10)
1. A detection device for a surface casing of an oil and gas well is characterized by comprising:
the two ends of the pipe body (1) are coaxially sleeved with a guide ring (3) respectively;
the two arc-shaped clamping pieces (6) are oppositely arranged in the pipe body (1), and a channel formed between the two clamping pieces (6) is coaxial with the pipe body (1);
and the fixed part of the linear displacement mechanism is connected with the pipe body (1), and the movable part of the linear displacement mechanism is connected with the clamping piece (6) and is used for driving the clamping piece (6) to move along the radial direction of the pipe body (1).
2. The oil and gas well surface casing detection device according to claim 1, characterized in that a plurality of limiting clamping pieces (13) are uniformly distributed on the inner side of the guide ring (3) along the circumferential direction of the guide ring (3), one side of the limiting clamping piece (13) on the inner side of one guide ring (3) far away from the pipe body (1) is hinged with the inner wall of the guide ring (3), one side of the limiting clamping piece (13) on the inner side of the other guide ring (3) close to the pipe body (1) is hinged with the inner wall of the guide ring (3), and one side of the limiting clamping piece (13) far away from the hinged end is connected with the inner wall of the guide ring (3) through an elastic piece.
3. The oil-gas well surface casing detection device according to claim 2, wherein a plurality of accommodating grooves (19) are formed in the inner wall of the guide ring (3), a limiting rod (20) is slidably arranged in the accommodating groove (19), a first elastic part (21) is arranged in the accommodating groove (19), one end of the first elastic part (21) is fixedly connected with the limiting rod (20), the other end of the first elastic part is fixedly connected with the inner wall of the accommodating groove (19), the outer end of the limiting rod (20) is fixedly connected with a second elastic part, and one end of the second elastic part, which is far away from the limiting rod (20), is fixedly connected with one side, which is far away from the hinge end, of the limiting clamping piece (13).
4. The oil and gas well surface casing detection device of claim 2, characterized in that the inner wall of the guide ring (3) is fixedly provided with an ear plate (12), and the ear plate (12) is rotatably connected with the limiting clamping piece (13).
5. The oil and gas well surface casing detection device according to claim 1, wherein the linear displacement mechanism comprises a screw (4), the length direction of the screw is arranged along the radial direction of the pipe body (1), the screw (4) penetrates through the pipe wall of the pipe body (1) and is in threaded connection with the pipe wall, one end of the screw (4) located in the pipe body (1) is rotatably connected with the clamping piece (6), one end of the screw (4) departing from the clamping piece (6) is fixedly connected with a handheld portion (5), and a limiting structure is arranged between the clamping piece (6) and the pipe body (1).
6. The oil and gas well surface casing detection device according to claim 5, wherein the limiting structure comprises a guide groove which is formed in the circumferential surface of the pipe body (1), the direction of the guide groove is the same as the length direction of the screw (4), a guide rod (7) is arranged in the guide groove in a sliding mode, and one end, located in the pipe body (1), of the guide rod (7) is connected with the clamping piece (6).
7. The oil and gas well surface casing detection device according to claim 6, characterized in that one end of the guide rod (7) departing from the clamping piece (6) is connected with an indication block (8), the outer wall of the pipe body (1) is fixedly provided with a scale plate (14), and the length direction of the scale plate (14) is the same as the moving direction of the guide rod (7) and is used for observing the height of the indication block (8).
8. The oil and gas well surface casing detection device according to claim 1, further comprising a support structure, wherein the support structure comprises mounting seats (2) which are arranged on two sides of the pipe body (1) and fixedly connected with the outer peripheral surface of the pipe body (1), one side of the mounting seat (2) departing from the pipe body (1) is provided with a mounting groove, a positioning block (9) is arranged in the mounting groove, the positioning block (9) is detachably connected with the mounting seat (2), and one side of the positioning block (9) departing from the pipe body (1) is fixedly connected with a vertically arranged support plate (10).
9. The oil and gas well surface casing detection device according to claim 8, characterized in that a sliding groove is formed at the bottom of the support plate (10), a sliding plate (11) is arranged in the sliding groove, a third elastic member (18) is arranged in the sliding groove, one end of the third elastic member (18) is fixedly connected with the inner wall of the sliding groove, the other end of the third elastic member is fixedly connected with the sliding plate (11), and a bottom plate (16) is fixedly connected with the bottom of the sliding plate (11).
10. The oil and gas well surface casing detection device of claim 9, characterized in that the bottom of the bottom plate (16) is provided with a non-slip mat (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221270770.4U CN217327287U (en) | 2022-05-25 | 2022-05-25 | Oil gas well surface casing detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221270770.4U CN217327287U (en) | 2022-05-25 | 2022-05-25 | Oil gas well surface casing detection device |
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| Publication Number | Publication Date |
|---|---|
| CN217327287U true CN217327287U (en) | 2022-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221270770.4U Active CN217327287U (en) | 2022-05-25 | 2022-05-25 | Oil gas well surface casing detection device |
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| Country | Link |
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| CN (1) | CN217327287U (en) |
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2022
- 2022-05-25 CN CN202221270770.4U patent/CN217327287U/en active Active
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