CN213684009U - A sleeve pipe stagnant water swing joint device for drilling test of drawing water - Google Patents
A sleeve pipe stagnant water swing joint device for drilling test of drawing water Download PDFInfo
- Publication number
- CN213684009U CN213684009U CN202022840019.0U CN202022840019U CN213684009U CN 213684009 U CN213684009 U CN 213684009U CN 202022840019 U CN202022840019 U CN 202022840019U CN 213684009 U CN213684009 U CN 213684009U
- Authority
- CN
- China
- Prior art keywords
- diameter
- water
- double
- sleeve
- water stopping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 225
- 238000005553 drilling Methods 0.000 title claims abstract description 15
- 238000005086 pumping Methods 0.000 claims abstract description 17
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 4
- 244000025254 Cannabis sativa Species 0.000 claims description 3
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 claims description 3
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 235000009120 camo Nutrition 0.000 claims description 3
- 235000005607 chanvre indien Nutrition 0.000 claims description 3
- 239000011487 hemp Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 230000000246 remedial effect Effects 0.000 description 3
- 230000002547 anomalous effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model discloses a sleeve water stop movable connecting device for a drilling water pumping test, which comprises an upper first double-thread annular joint, an inner double-thread annular joint, an outer double-thread annular joint and an upper second double-thread annular joint, wherein the inner diameter of the upper first double-thread annular joint is larger than the outer diameter of the upper second double-thread annular joint; the upper end of the upper and lower first double-screw annular joint is connected with a first large-diameter water stopping sleeve, the lower end of the upper and lower first double-screw annular joint is connected to the outer diameter of the inner and outer double-screw retaining ring joints, the upper end of the upper and lower second double-screw annular joint is connected to the upper and lower ends of the inner diameter of the inner and outer double-screw retaining ring joints and is connected with a small-diameter water stopping sleeve, the outer ring of the small-diameter water stopping sleeve is connected with a movable pressure plate and a water stopping object, and the movable pressure plate is connected to. The utility model has the advantages of simple structure and reasonable design, use nimble, be convenient for processing and dismouting to can make up multiple connection according to the demand, satisfy the use under the downthehole multiple complex condition, the practicality is strong.
Description
Technical Field
The utility model relates to a sleeve pipe stagnant water connecting device, concretely relates to sleeve pipe stagnant water swing joint device for drilling is taken water experimentally belongs to hydrogeology drilling and is taken water experimental technical field.
Background
In hydrogeological work, the hydraulic connection, the water-rich degree, the hydrogeological parameter determination and the like of an aquifer are known and found out and are often obtained through a pumping test, and the pumping test is an important technical means; in the water pumping test link, temporary water stopping is needed for the upper position where water pumping is not needed, and the water stopping effect is an important link for correctly reflecting hydrogeological parameters, and is directly related to the quality (water level, water quantity, water quality, calculation results and the like) of the water pumping test; the water stopping method is good and bad, and is related to the selection of a drilling structure (hole depth, hole diameter and variable diameter) and a water stopping position.
The drilling water stopping method is generally divided into same-diameter water stopping and different-diameter water stopping, although the water stopping effect is reliable, the diameter of the different-diameter water stopping is increased by one-stage or two-stage aperture in the drilling design and construction, particularly in deep holes, the hole expanding work is not economical and reasonable, the workload is increased, the construction period is prolonged, and the hole expanding work is also examined for safety problems such as collapse prevention, block falling prevention and the like in the holes; the prior same-diameter water stop is influenced by the complex situation in the hole in the practical use, and the water stop effect is not ideal.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: the movable connecting device for the sleeve water stopping for the drilling water pumping test is used for effectively solving the problems that the same-diameter water stopper is not ideal in water stopping effect under the complex condition in the hole and the remedial measures after the different-diameter water stopping fails.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a sleeve water stop movable connection device for a drilling water pumping test comprises a movable connection device consisting of an upper and a lower first double-threaded annular joints, an inner and outer double-threaded ring-shaped joint and an upper and a lower second double-threaded annular joints, wherein the inner diameter of the upper and the lower first double-threaded annular joints is larger than the outer diameter of the upper and the lower second double-threaded annular joints; the upper end of the upper and lower first double-screw thread annular joint is connected with a first large-diameter water stopping sleeve, the lower end of the upper and lower first double-screw thread annular joint is connected on the outer diameter of the inner and outer double-screw thread annular joints, the upper end of the upper and lower second double-screw thread annular joint is connected with the upper and lower ends of the inner diameter of the inner and outer double-screw thread annular joints and connected with a small-diameter water stopping sleeve, the outer ring of the small-diameter water stopping sleeve is connected with a movable pressure plate and a water stopping object, the movable pressure plate is connected at the upper end of the water stopping object, and the first large-diameter water stopping sleeve, the small-diameter water stopping.
The upper half part of the upper and lower first double-screw-thread annular joint is provided with an outer thin screw thread, the lower half part of the upper and lower first double-screw-thread annular joint is provided with an inner thick screw thread, the outer diameter of the inner and outer double-screw-thread annular joint is provided with an outer thick screw thread, the inner diameter of the inner and outer double-screw-thread annular joint is provided with an inner thin screw thread, and the upper and lower parts of the upper and lower second double-screw-thread annular joint.
The upper and lower first double-screw annular joints are connected with the first large-diameter water-stop casing through the outer thin screw threads on the upper half part, are connected with the outer thick screw threads on the outer diameter of the inner and outer double-screw snap-ring-shaped joints through the inner thick screw threads on the lower half part in a matching manner, and are connected with the small-diameter water-stop casing through the outer thin screw threads on the upper half part and the inner thin screw threads on the inner diameter of the inner and outer double-screw snap-ring-shaped joints in a matching manner, and the outer thin screw threads on the lower half part.
The lower end of the small-diameter water stop sleeve is connected with a second large-diameter water stop sleeve through a reducer union, and the lower end of the second large-diameter water stop sleeve is connected with a strainer; the reducer union, the second large-diameter water stopping sleeve and the strainer pipe form a same-diameter water stopping device together with the movable connecting device and the water stopping device.
The small-diameter water stopping sleeve and the water stopping object of the different-diameter water stopping device are connected between the second large-diameter water stopping sleeve and the water filtering pipe of the same-diameter water stopping device, namely, the same-diameter water stopping device is added on the different-diameter water stopping device, and the same-diameter water stopping device form the sleeve water stopping device for stopping water in the same diameter and stopping water in different diameters.
And a combined structure of a plurality of layers of movable connecting devices and the water stopping device is connected between the second large-diameter water stopping sleeve and the water filter pipe of the same-diameter water stopping device to form the multi-layer water stopping device.
The upper and lower first double-threaded annular joints are casing joints with the outer diameter of 127mm, and the upper and lower second double-threaded annular joints are casing joints with the outer diameter of 89 mm.
The first large-diameter water stopping sleeve is an upper water stopping sleeve or a lower pump section sleeve with the outer diameter of 127mm, and the small-diameter water stopping sleeve is a lower supporting sleeve with the outer diameter of 89mm or a water stopping sleeve wrapped with a water stopping object.
The movable pressure plate is an annular steel plate capable of moving up and down, the first large-diameter water stopping sleeve on the upper portion presses downwards to drive the movable pressure plate sleeved on the small-diameter water stopping sleeve to slide downwards at the same time, and the movable pressure plate extrudes the water stopping objects to fill an annular space between the hole wall and the sleeve after being expanded.
The water stopping objects are objects for stopping water, such as hemp ropes, putty, expansion adhesive tapes and the like which are wound and wrapped outside the small-diameter water stopping sleeve.
The utility model has the advantages that:
1) the device of the utility model is simple in structure, small and exquisite nimble, easy dismouting, easy transportation, workable, and can process different sizes according to downthehole different conditions for the sleeve pipe stagnant water of different aperture drilling, the range of application is wide.
2) The utility model discloses the device is when downthehole anomalous position stagnant water, and its stagnant water is effectual behind the compression stagnant water thing, has effectively solved the unsatisfactory problem of stagnant water effect with footpath sealing up ware under downthehole complex condition.
3) The utility model discloses the mode that the structural connection among the device adopted the screw thread to connect makes device connection structure downthehole keep stagnant water sleeve pipe's wholeness, thereby makes stagnant water sleeve pipe be difficult for the upper and lower activity protection stagnant water thing.
4) The utility model discloses if meet and hinder in the downthehole activity from top to bottom of anomalous water stopping sleeve in the device is connected, can anticlockwise rotation for the water stopping sleeve avoids meeting and hinders the point and arrive the assigned position smoothly.
5) The utility model discloses the device can increase one with footpath stagnant water and adopt remedial measure at the this swing joint device of upper portion installation of reducing stagnant water position when reducing stagnant water failure.
6) The utility model discloses the device can be used in the stagnant water position of downthehole difference, reaches the purpose of segmentation multilayer stagnant water.
Drawings
FIG. 1 is a sectional view of the movable connecting device of the present invention;
FIG. 2 is a schematic view of the overall structure of the present invention for stopping water in the same diameter;
FIG. 3 is a schematic view of the overall structure of the present invention for stopping water in the same diameter and stopping water in different diameters;
fig. 4 is a schematic view of the overall structure of the multi-layer water stop of the present invention.
In the figure, 1-an upper and lower first double-screw ring-shaped joint, 2-an inner and outer double-screw ring-shaped joint, 3-an upper and lower second double-screw ring-shaped joint, 4-a first large-diameter water stopping sleeve, 5-a small-diameter water stopping sleeve, 6-a movable pressure plate, 7-a water stopping object, 8-a reducing joint, 9-a second large-diameter water stopping sleeve and 10-a filter pipe, wherein the direction shown by an arrow in the figure is the moving direction of the small-diameter water stopping sleeve.
Detailed Description
The invention is further explained below with reference to the drawings and the embodiments.
As shown in fig. 1-2, the sleeve water-stopping movable connection device for the drilling water-pumping test of the present invention comprises a movable connection device consisting of an upper and a lower first double-threaded annular joints 1, an inner and an outer double-threaded annular joints 2, and an upper and a lower second double-threaded annular joints 3, wherein the inner diameter of the upper and the lower first double-threaded annular joints 1 is larger than the outer diameter of the upper and the lower second double-threaded annular joints 3; the upper half part of the upper and lower first double-screw annular joint 1 is provided with an outer thin screw thread, the lower half part is provided with an inner thick screw thread, the outer diameter of the inner and outer double-screw annular joint 2 is provided with an outer thick screw thread, the inner diameter of the inner and outer double-screw annular joint is provided with an inner thin screw thread, and the upper and lower parts of the upper and lower second double-screw annular joint 3 are both provided with outer thin screw threads.
The upper and lower first double-screw annular joints 1 are connected with a first large-diameter water stop sleeve 4 through outer thin screw threads of the upper half part and are in fit connection with outer thick screw threads on the outer diameter of the inner and outer double-screw annular joints 2 through inner thick screw threads of the lower half part, and the upper and lower second double-screw annular joints 3 are in fit connection with inner thin screw threads on the inner diameter of the inner and outer double-screw annular joints 2 through outer thin screw threads of the upper half part and are connected with a small-diameter water stop sleeve 5 through outer thin screw threads of the lower half part.
The outer ring of the small-diameter water stopping sleeve 5 is connected with a movable pressure plate 6 and a water stopping object 7, the movable pressure plate 6 is connected to the upper end of the water stopping object 7, and the first large-diameter water stopping sleeve 4, the small-diameter water stopping sleeve 5, the movable pressure plate 6 and the water stopping object 7 form a water stopping device.
The upper and lower first double-threaded annular joints 1 are casing joints with an outer diameter of 127mm, and the upper and lower second double-threaded annular joints 3 are casing joints with an outer diameter of 89 mm.
The first large-diameter water stop sleeve 4 is an upper water stop sleeve or a lower pump section sleeve with the outer diameter of 127mm, and the small-diameter water stop sleeve 5 is a lower supporting sleeve with the outer diameter of 89mm or a water stop sleeve for wrapping a water stop object.
The movable pressure plate 6 is made of an annular steel plate capable of moving up and down, the movable pressure plate 6 is driven to slide downwards by downward pressure of the first large-diameter water stopping sleeve 4 on the upper portion, and the extruded water stopping objects 7 are expanded to fill an annular space between the hole wall and the sleeve.
The water stopping object 7 is an object for stopping water, such as a hemp rope, putty, an expansion rubber strip and the like which is wound and wrapped outside the small-diameter water stopping sleeve 5.
Example 1: as shown in fig. 2, the lower end of the small-diameter water-stopping casing 5 is connected with a second large-diameter water-stopping casing 9 through a reducer joint 8, and the lower end of the second large-diameter water-stopping casing 9 is connected with a strainer 10; the reducer union 8, the second large-diameter water stopping sleeve 9, the water filtering pipe 10, the movable connecting device and the water stopping device form a same-diameter water stopping device together.
Example 2: as shown in fig. 3, the small diameter water stopping sleeve 5 and the water stopping object 7 of the different diameter water stopping device are connected between the second large diameter water stopping sleeve 9 and the strainer 10 of the same diameter water stopping device, that is, the same diameter water stopping device is added on the different diameter water stopping device, and the same diameter water stopping device form a sleeve water stopping device with the same diameter water stopping and the different diameter water stopping.
Example 3: as shown in fig. 4, a combined structure of a multilayer movable connecting device and a water stopping device is connected between a second large-diameter water stopping sleeve 9 and a strainer 10 of the same-diameter water stopping device to form the multilayer water stopping device.
The working principle is as follows: determining the water stopping position according to the actual drilling situation, calculating the length of the upper first large-diameter water stopping sleeve 4, then putting the sleeve into the hole, enabling the position of the water stopping object 7 and the water stopping position in the hole to be at the same depth, enabling the bottom opening of the lowest water filtering pipe 10 to be at the hole bottom position, rotating the upper first large-diameter water stopping sleeve 4 anticlockwise, enabling the connection mode of the upper first large-diameter water stopping sleeve 4 and the upper first lower double-thread annular joint 1 of the movable connecting device to be a positive thread, enabling the upper first large-diameter water stopping sleeve 4 to rotate anticlockwise and simultaneously separate from the inner double-thread annular joint 2 and the outer double-thread annular joint 2 of the movable connecting device (because the connection mode of the inner double-thread annular joint 2 and the outer double-thread annular joint 2 of the movable connecting device and the small-diameter water stopping sleeve 5 of the lower part is a reverse thread, the inner double-thread annular joint and the lower double-thread annular joint 1 of the movable connecting device are separated from the upper first large-, the first big footpath stagnant water sleeve pipe 4 on upper portion slowly exerts pressure the in-process downwards this swing joint device and the path stagnant water sleeve pipe 5 of being connected get into inside the first big footpath stagnant water sleeve pipe 4 to drive movable pressure disk 6 and move downwards simultaneously, extrude when movable pressure disk 6 moves downwards and stop the water thing 7 inflation after fill the annular space between pore wall and the sleeve pipe, reach the stagnant water purpose.
If the water stop sleeve pipe is blocked in the irregular hole during up-and-down movement, the water stop sleeve pipe can rotate anticlockwise, so that the water stop sleeve pipe avoids the blocking point and smoothly reaches the designated position.
The device of the utility model is simple in structure, small and exquisite nimble, easy dismouting, easy transportation, workable, and can process different sizes according to downthehole different conditions for the sleeve pipe stagnant water of different apertures drilling, the practicality is strong.
When the utility model stops water in irregular positions in the hole, the water stopping effect is good after the water stopping object is compressed, and the problem that the water stopping effect of the same-diameter water stopper is not ideal under the complex condition in the hole is effectively solved; when the different-diameter water stopping fails according to requirements, the movable connecting device is arranged at the upper part of the different-diameter water stopping position, and a same-diameter water stopping is added to adopt a remedial measure; the water-stopping device can also be used at different water-stopping positions in the hole, so that the aim of sectionally stopping water in multiple layers is fulfilled.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for limiting the same, and other modifications or equivalent replacements made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. The utility model provides a sleeve pipe stagnant water swing joint device for drilling test of drawing water which characterized in that: the connecting device comprises a movable connecting device consisting of an upper double-threaded annular joint (1), a lower double-threaded annular joint (1), an inner double-threaded annular joint (2), an outer double-threaded annular joint (3) and an upper double-threaded annular joint (3), wherein the inner diameter of the upper first double-threaded annular joint (1) is larger than the outer diameter of the upper second double-threaded annular joint (3); the upper end of the upper and lower first double-screw ring joint (1) is connected with a first large-diameter water stopping sleeve (4), the lower end of the upper and lower first double-screw ring joint is connected on the outer diameter of the inner and outer double-screw ring joint (2), the upper end of the upper and lower second double-screw ring joint (3) is connected on the inner diameter of the inner and outer double-screw ring joint (2), the lower end of the inner and outer double-screw ring joint is connected with a small-diameter water stopping sleeve (5), the outer ring of the small-diameter water stopping sleeve (5) is connected with a movable pressure plate (6), the movable pressure plate (6) is connected at the upper end of the water stopping object (7), and the first large-diameter water stopping sleeve (4), the small-diameter water stopping sleeve (5), the movable pressure plate (6) and the water stopping object.
2. The casing water stop movable connection device for the borehole water pumping test according to claim 1, characterized in that: the upper half part of the upper and lower first double-screw annular joint (1) is provided with an outer thin screw thread, the lower half part of the upper and lower first double-screw annular joint is provided with an inner thick screw thread, the outer diameter of the inner and outer double-screw annular joint (2) is provided with an outer thick screw thread, the inner diameter of the inner and outer double-screw annular joint is provided with an inner thin screw thread, and the upper and lower parts of the upper and lower second double-screw annular joint (3) are both provided with outer thin screw threads.
3. The casing water stop movable connection device for the borehole water pumping test according to claim 2, characterized in that: the upper and lower first double-thread annular joints (1) are connected with the first large-diameter water stop sleeve (4) through the outer thin thread on the upper half part, are connected with the outer thick thread on the outer diameter of the inner and outer double-thread snap-ring-shaped joints (2) through the inner thick thread on the lower half part in a matching manner, and the upper and lower second double-thread annular joints (3) are connected with the inner thin thread on the inner diameter of the inner and outer double-thread snap-ring-shaped joints (2) through the outer thin thread on the upper half part in a matching manner, and are connected with the small-diameter water stop sleeve (5) through the outer thin thread on the lower half part.
4. The casing water stop movable connection device for the borehole water pumping test according to claim 1, characterized in that: the lower end of the small-diameter water stop sleeve (5) is connected with a second large-diameter water stop sleeve (9) through a reducer union (8), and the lower end of the second large-diameter water stop sleeve (9) is connected with a water filter pipe (10); the reducer union (8), the second large-diameter water stopping sleeve (9) and the strainer pipe (10) form a same-diameter water stopping device together with the movable connecting device and the water stopping device.
5. The casing water stop movable connection device for the borehole water pumping test according to claim 4, wherein: the small-diameter water stopping sleeve (5) and the water stopping object (7) of the different-diameter water stopping device are connected between the second large-diameter water stopping sleeve (9) and the water filtering pipe (10) of the same-diameter water stopping device, namely, the same-diameter water stopping device is added on the different-diameter water stopping device and forms a double-sleeve water stopping device for stopping water in the same diameter and stopping water in different diameters together with the same-diameter water stopping device.
6. The casing water stop movable connection device for the borehole water pumping test according to claim 4, wherein: and a combined structure of a plurality of layers of movable connecting devices and the water stopping device is connected between the second large-diameter water stopping sleeve (9) and the strainer (10) of the same-diameter water stopping device to form the multi-layer water stopping device.
7. The casing water stop movable connection device for the borehole water pumping test according to claim 1, characterized in that: the upper and lower first double-threaded annular joints (1) are casing joints with the outer diameter of 127mm, and the upper and lower second double-threaded annular joints (3) are casing joints with the outer diameter of 89 mm.
8. The casing water stop movable connection device for the borehole water pumping test according to claim 1, characterized in that: the first large-diameter water stopping sleeve (4) is an upper water stopping sleeve or a lower pump section sleeve with the outer diameter of 127mm, and the small-diameter water stopping sleeve (5) is a lower supporting sleeve with the outer diameter of 89mm or a water stopping sleeve wrapped with a water stopping object.
9. The casing water stop movable connection device for the borehole water pumping test according to claim 1, characterized in that: the movable pressure plate (6) is an annular steel plate capable of moving up and down, and the water stopper (7) is hemp rope, putty or expansion rubber strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022840019.0U CN213684009U (en) | 2020-12-01 | 2020-12-01 | A sleeve pipe stagnant water swing joint device for drilling test of drawing water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022840019.0U CN213684009U (en) | 2020-12-01 | 2020-12-01 | A sleeve pipe stagnant water swing joint device for drilling test of drawing water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213684009U true CN213684009U (en) | 2021-07-13 |
Family
ID=76737471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022840019.0U Expired - Fee Related CN213684009U (en) | 2020-12-01 | 2020-12-01 | A sleeve pipe stagnant water swing joint device for drilling test of drawing water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213684009U (en) |
-
2020
- 2020-12-01 CN CN202022840019.0U patent/CN213684009U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209654004U (en) | A kind of Concentric Coiled Tubing hanger | |
| CN213684009U (en) | A sleeve pipe stagnant water swing joint device for drilling test of drawing water | |
| CN108442916B (en) | Open hole screen pipe damage detection tubular column for horizontal well | |
| CN205047188U (en) | Deblocking packer can be sealed by repeated seat to motion of non - tubular column | |
| CN209129576U (en) | A kind of big orifice cable-passing packer | |
| CN203476263U (en) | Coiled tubing speed tubular column hanger | |
| CN110552620B (en) | Pumping pressure type grouting circulating device for top drive drilling machine | |
| CN110578483B (en) | Grouting circulation assembly suitable for traveling block hook drilling machine and using method thereof | |
| CN212671708U (en) | Oil drainage mechanism and blowout-prevention oil drainage double-acting device | |
| CN213573998U (en) | Packer with good breakage-proof effect for oil exploitation | |
| CN210152602U (en) | Underground cementing device | |
| CN111894559B (en) | Inner channel decompression restrictor | |
| CN111043362A (en) | Compression type liquid control valve in well | |
| CN115749671B (en) | Drilling constant-pressure trap plugging tool and plugging method | |
| CN220488620U (en) | Adjustable seal head for pressure container | |
| CN205879696U (en) | Pipe fitting hydrostatic testing machine | |
| CN218991545U (en) | Double-hanging water stop device for drilling casing | |
| CN116989000B (en) | Mechanical sealing device for sewage pump | |
| CN220151321U (en) | Ball seat and pipe column using same | |
| CN217354317U (en) | Band-pressure operation fishing spear | |
| CN115288625B (en) | Sand washing and fishing equipment | |
| CN211501765U (en) | Compression type liquid control valve in well | |
| CN210422559U (en) | Guide pipe secondary well cementation single-flow short joint tool | |
| CN208267778U (en) | A kind of circulation leak stopping pipe nipple | |
| CN213297905U (en) | Combined packer used under high-temperature and high-pressure working condition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210713 |