CN214352163U - PVT sample cylinder switching piston dismounting device - Google Patents

Abstract

The application provides a PVT appearance section of thick bamboo switching piston dismounting device for dismantle switching piston on the PVT appearance section of thick bamboo, the first end of PVT appearance section of thick bamboo is provided with the switching piston, switching piston inboard is high-pressure nitrogen gas, annular rear portion end cap is installed in the switching piston outside, PVT appearance section of thick bamboo inner wall be provided with rear portion end cap complex internal thread, PVT appearance section of thick bamboo switching piston dismounting device includes hydraulic means, fixing device and screw ring, fixing device sets up to fixed PVT appearance section of thick bamboo with hydraulic means, hydraulic means's output passes the rear portion end cap and supports the switching piston, with after the rear portion end cap is torn down, the screw ring through with the internal thread fit is installed in the first end of PVT appearance section of thick bamboo, the internal thread length is greater than the length of screw ring, just the screw ring installation back, and a part of internal threads are reserved between the threaded ring and the adapter piston.

Description

PVT sample cylinder switching piston dismounting device

Technical Field

The application relates to but not limited to PVT appearance section of thick bamboo dismouting field, especially a PVT appearance section of thick bamboo switching piston dismounting device.

Background

The PVT sample cylinder is used for storing stratum sample bodies for PVT analysis, and can keep the same state of fluid as the underground fluid to the maximum extent. After underground operation, the one-way valve sealing plug on the adapter piston is easy to rust due to direct contact with slurry, so that the inner hexagon on the one-way valve sealing plug is easy to slip and buckle when being detached, and the one-way valve sealing plug is made of hard alloy and has extremely high hardness, thereby bringing great difficulty to detaching work. And the inner side of the one-way valve sealing plug is provided with a nitrogen-filled one-way valve, the one-way valve can damage air leakage due to factors such as vibration and well conditions, so that nitrogen directly contacts the hard alloy plug, the pressure of the PVT sample cylinder for compressing nitrogen is up to 8Mpa, the disassembly is very difficult, and extremely high disassembly risk exists.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a PVT appearance section of thick bamboo switching piston dismounting device can dismantle PVT appearance section of thick bamboo when the interior hexagonal on the check valve sealing plug damages, and easy operation is convenient, the security is high.

The embodiment of the application provides a PVT sample tube switching piston dismounting device, which is used for dismounting a switching piston on a PVT sample tube, wherein the first end of the PVT sample tube is provided with the switching piston, the inner side of the switching piston is high-pressure nitrogen, an annular rear end plug is installed on the outer side of the switching piston, the inner wall of the PVT sample tube is provided with an internal thread matched with the rear end plug, the PVT sample tube switching piston dismounting device comprises a hydraulic device, a fixing device and a threaded ring, the fixing device is set to fix the PVT sample tube and the hydraulic device, the output end of the hydraulic device penetrates through the rear end plug and supports against the switching piston,

after the rear plug is detached, the threaded ring is installed in the first end of the PVT sample cylinder through matching with the internal thread,

the length of the internal thread is larger than that of the threaded ring, and after the threaded ring is installed, a part of the internal thread is reserved between the threaded ring and the switching piston.

Compared with the prior art, the method has the following beneficial effects:

the PVT sample cylinder switching piston dismounting device provided by the application can be used for dismounting the PVT sample cylinder when the inner hexagon on the one-way valve sealing plug is damaged, and is high in dismounting efficiency, simple and convenient to operate, time-saving, labor-saving and good in economic benefit; the PVT sample cylinder switching piston dismounting device has a relatively simple structure, low manufacturing cost and convenient popularization and use; in actual operation, the whole disassembly process is high in safety, and the personal safety of operators is effectively guaranteed.

Other features and advantages of the present application will be set forth in the description that follows.

Drawings

The accompanying drawings are included to provide a further understanding of the claimed subject matter and are incorporated in and constitute a part of this specification, illustrate embodiments of the subject matter and together with the description serve to explain the principles of the subject matter and not to limit the subject matter.

Fig. 1 is a schematic structural diagram of a PVT sample cell according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a first end of a PVT sample cell according to an embodiment of the present disclosure;

fig. 3 is a first schematic structural diagram of a PVT sample cylinder adapter piston dismounting device according to an embodiment of the present disclosure;

fig. 4 is a second schematic structural diagram of a PVT sample tube adapter piston dismounting device according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a threaded ring according to an embodiment of the present disclosure;

fig. 6 is a schematic structural view of a dismounting rod according to an embodiment of the present application.

Illustration of the drawings:

1-PVT sample cylinder, 11-adapting piston, 111-one-way valve, 112-one-way valve sealing plug, 113-sealing ring, 12-rear plug, 13-high pressure nitrogen, 2-thread ring, 21-first gap, 22-matching part, 31-hydraulic cylinder, 32-hand pump, 33-reversing valve, 34-extension bar, 41-operation table, 42-PVT sample cylinder fixing ring, 43-hydraulic cylinder fixing ring, 44-PVT sample cylinder fixing base, 45-hydraulic cylinder fixing base, 46-PVT sample cylinder limiting block, 47-hydraulic cylinder limiting block, 5-dismounting bar, 51-second gap, 52-positioning part and 6-protective cover.

Detailed Description

To make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

The switching piston of the PVT sample cylinder is provided with a one-way valve, the switching piston is further provided with a one-way valve sealing plug used for sealing the one-way valve, and the one-way valve sealing plug is provided with an inner hexagon used for dismounting. When the current PVT sample cylinder is disassembled on the ground after sampling is finished, if the inner hexagon on the switching piston is intact, the one-way valve can be disassembled to seal and block so as to release internal high-pressure nitrogen, and then other parts of the PVT sample cylinder are disassembled. In actual operation, the one-way valve seal plug on the adapter piston is easy to rust due to direct contact with slurry, so that the inner hexagon on the one-way valve seal plug is easy to slip and buckle when detached, the one-way valve seal plug cannot be normally detached, high-pressure nitrogen in the PVT sample cylinder cannot be released, and the rear plug is extruded by the adapter piston and cannot be detached. For the situation, no operation specification and no special dismounting tool exist at present, and the hard alloy (namely the one-way valve sealing plug) is generally broken and taken out little by using a punch, but the method has long period, small application range and extremely high risk.

The embodiment of the application provides a PVT sample cylinder adapter piston dismounting device, as shown in figures 3 to 6, the device is used for dismounting the switching piston 11 on the PVT sample cylinder 1, the first end of the PVT sample cylinder 1 is provided with the switching piston 11, the inner side of the switching piston 11 is high-pressure nitrogen 13, the outer side of the switching piston 11 is provided with an annular rear end plug 12, the inner wall of the PVT sample cylinder 1 is provided with an internal thread matched with the rear end plug 12, the device for dismounting the switching piston of the PVT sample cylinder comprises a hydraulic device, a fixing device and a threaded ring 2, the fixing device is used for fixing the PVT sample cylinder 1 and the hydraulic device, the output end of the hydraulic device penetrates through the rear end plug 12 and abuts against the switching piston 11, after the rear end plug 12 is dismounted, the threaded ring 2 is installed in the first end of the PVT sample cell 1 by fitting with an internal thread, the length of which is greater than that of the threaded ring 2, and after the threaded ring 2 is installed, a part of internal threads are reserved between the threaded ring 2 and the adapter piston 11.

According to the PVT sample tube transfer piston dismounting device provided by the embodiment of the application, the hydraulic device is used for propping against the transfer piston 11, so that the extrusion force of the transfer piston 11 to the rear plug 12 is removed, and the rear plug 12 can be conveniently dismounted; then the threaded ring 2 is installed at the original position of the rear plug 12 (the adapter piston 11 is prevented from directly dropping out of the first end due to the pressure of the high-pressure nitrogen 13); the pressure of the hydraulic device is gradually removed, the adapter piston 11 moves towards the threaded ring 2 under the action of the high-pressure nitrogen 13 and abuts against the threaded ring 2, at the moment, the outer circumference of the adapter piston 11 is in contact with the internal thread of the PVT sample cylinder 1, the adapter piston 11 is not sealed with the inner wall of the PVT sample cylinder 1 any more, the high-pressure nitrogen 13 is released through a gap between the outer circumference of the adapter piston and the internal thread of the PVT sample cylinder 1, and the adapter piston 11 can be conveniently detached.

In an exemplary embodiment, as shown in fig. 2, a sealing ring 113 is disposed on an outer circumferential surface of the adaptor piston 11, a distance between the sealing ring 113 and an outer end surface of the adaptor piston 11 (a right end surface of the adaptor piston 11 in fig. 2) is L1, a length of an internal thread portion reserved between the threaded ring 2 and the adaptor piston 11 is L2, and L1 is equal to or less than L2.

Namely: when the adapter piston 11 is pressed against the threaded ring 2, the seal ring 113 is in contact with the internal thread, so that the high-pressure nitrogen gas 13 is released through the gap between the outer circumference of the adapter piston and the internal thread of the PVT sample tube 1.

In an exemplary embodiment, as shown in fig. 5, the threaded ring 2 is provided with a first notch 21, and the threaded ring 2 is sleeved on the output end of the hydraulic device through the first notch 21. The angle corresponding to the first notch 21 may be 90 °.

The output end of the hydraulic device abuts against the adapter piston 11, and after the rear plug 12 is removed, the threaded ring 2 needs to be installed in the first end so as to limit the adapter piston 11. Set up first breach 21 on the screw ring 2, make screw ring 2 can directly overlap on hydraulic means's output through first breach 21, and then install in first end, easy operation is convenient, and screw ring 2 simple structure is reliable.

In an exemplary embodiment, as shown in fig. 3 and 4, the hydraulic device includes a hydraulic cylinder 31(HSG50 x 28) and a hand pump 32 (e.g., an enderpac-P392 hand pump), the hand pump 32 being connected to the hydraulic cylinder 31 via a directional valve 33. The hand pump 32 is located away from the first end of the PVT sample cell 1. Of course, the hydraulic device also includes lines for connecting the hydraulic cylinder 31, the hand pump 32 and the directional valve 33, which are not shown in fig. 3 and 4. The hand pump 32 may be provided with a check valve, a pressure gauge, etc. for the convenience of operation.

The hand pump 32 is used for pressurizing and decompressing the hydraulic cylinder 31, and the operation is simple and convenient. The change-over valve 33 may be a three-position four-way change-over valve. The hand pump 32 is arranged at a position far away from the first end of the PVT sample cylinder 1 (for example, the direction of the high-pressure nitrogen 13 is back to the discharge direction), so that the safety is improved, the conditions that the high-pressure nitrogen 13 in the first end is sprayed out or parts are separated and the like due to accidents in the disassembly process are avoided, and the safety of an operator when the hand pump 32 is operated is protected.

In an exemplary embodiment, as shown in fig. 3, the hydraulic device further includes an extension bar 34, the extension bar 34 being disposed at an output end of the hydraulic cylinder 31, the extension bar 34 passing through the rear plug 12 and abutting against the adaptor piston 11.

The extension bar 34 is arranged, so that the positions of the hydraulic device and the PVT sample cylinder 1 on the fixing device can be conveniently adjusted, the length of the extension bar 34 is directly selected or changed, and the positions of the hydraulic device and the PVT sample cylinder 1 do not need to be repeatedly adjusted.

At the complete withdrawal position of pneumatic cylinder 31, make the end of extension bar 34 still can partially stretch into in the first end, even if the pneumatic cylinder 31 goes wrong, guarantee that switching piston 11 also can not deviate from extension bar 34, guarantee operating personnel's safety.

In an exemplary embodiment, as shown in fig. 3 and 4, the fixing device includes an operation table 41, a PVT sample tube fixing ring 42, and a hydraulic cylinder fixing ring 43, and the PVT sample tube fixing ring 42 and the hydraulic cylinder fixing ring 43 fix the PVT sample tube 1 and the hydraulic cylinder 31, respectively, on the operation table 41. The console 41 may be a movable stand, such as: and casters are arranged on the four support legs.

The operation table 41 is provided with a PVT sample tube fixing base 44 and a hydraulic cylinder fixing base 45, and the PVT sample tube fixing base 44 and the hydraulic cylinder fixing base 45 are fixed on the operation table 41 by welding to improve the reliability of connection. The PVT sample tube fixing ring 42 and the hydraulic cylinder fixing ring 43 are respectively mounted on the PVT sample tube fixing base 44 and the hydraulic cylinder fixing base 45 by means of bolt connection, and respectively fix the PVT sample tube 1 and the hydraulic cylinder 31. Further, a PVT sample tube stopper 46 and a hydraulic cylinder stopper 47 are provided on the operation table 41, and axially restrict the PVT sample tube 1 and the hydraulic cylinder 31, respectively, and fix the PVT sample tube 1 and the hydraulic cylinder 31 together with the PVT sample tube fixing base 44, the hydraulic cylinder fixing base 45, the PVT sample tube fixing ring 42, and the hydraulic cylinder fixing ring 43. The PVT sample tube fixing ring 42 and the hydraulic cylinder fixing ring 43 may be semicircular ring structures. The number of the PVT sample tube fixing rings 42 and the hydraulic cylinder fixing rings 43 may be set to two.

In an exemplary embodiment, as shown in fig. 3 and 6, the PVT-like canister adapter piston removing apparatus further includes a removing rod 5, the removing rod 5 is provided with a positioning portion 52, and the removing rod 5 is used for removing the threaded ring 2 and the rear plug 12. The threaded ring 2 has an engagement portion 22 on the end surface thereof, and the removal rod 5 is used to attach the threaded ring 2 to the first end of the PVT sample container 1 or remove the threaded ring 2 from the first end of the PVT sample container 1.

Through 5 dismouting screw rings 2 of disassembling and assembling poles, avoid operating personnel direct hand contact screw ring 2, improve the security of operation, and operate more laborsavingly. The positioning portion 52 of the dismounting rod 5 may be provided with three protrusions, and the matching portion 22 of the threaded ring 2 may be provided with three grooves corresponding to the three protrusions on the end surface. Of course, the removal rod 5 may also be used to remove the rear plug 12.

In an exemplary embodiment, as shown in fig. 6, the dismounting rod 5 is provided with a second notch 51. The angle corresponding to the second notch 51 may be 90 °.

The dismounting rod 5 is sleeved on the output end (the extension rod 34) of the hydraulic device through the second notch 51, and the threaded ring 2 is conveniently dismounted.

In an exemplary embodiment, as shown in fig. 4, the PVT sample cartridge adapter piston dismounting device further comprises a shield 6, the shield 6 being mounted at the first end of the PVT sample cartridge 1.

The protective cover 6 is arranged at the first end of the PVT sample cylinder 1, so that the splashing of slurry and sundries can be effectively prevented, and the operation safety is further ensured.

In actual use, the PVT sample tube 1 and the hydraulic cylinder 31 are fixed to the operation table 41 by the PVT sample tube fixing ring 42 and the hydraulic cylinder fixing ring 43, respectively. The three-position, four-way reversing valve is then adjusted and the hand pump 32 is depressed, forcing the extension stem 34 against the adaptor piston 11. The middle position of the three-position four-way reversing valve is adjusted, the rear plug 12 is detached by the detaching rod 5, and the rear plug 12 is moved along the extension rod 34 and away from the first end. And a threaded ring 2 is arranged in the first end, and internal threads which are contacted with the adapter piston 11 are reserved on the left side part of the threaded ring 2 on the inner wall of the PVT sample cylinder 1. The dismounting rod 5 is taken down, the three-position four-way reversing valve is adjusted, the pressure oil is slowly dismounted through the needle valve of the hand pump 32, at the moment, the switching piston 11 moves to the right under the action of the high-pressure nitrogen 13, the switching piston 11 cannot be separated from the first end due to the limit of the threaded ring 2, and the internal nitrogen pressure is automatically dismounted after the sealing ring 113 of the switching piston 11 reaches the internal thread. The three-position four-way reversing valve is adjusted, and the hydraulic cylinder 31 is retracted. The adapter piston 11 is removed for further operation.

The PVT sample cylinder switching piston dismounting device provided by the embodiment of the application can finish the dismounting work of the PVT sample cylinder 1, can take out the one-way valve sealing plug 112 together with the switching piston 11, is wide in application range, can be used for dismounting under normal conditions aiming at the condition that the one-way valve sealing plug 112 is damaged, can improve the maintenance and protection timeliness, reduce the labor cost, standardize the operation method and eliminate potential safety hazards.

In the description of the present application, it should be noted that the term "plurality" means two or more, and the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the structures referred to have a specific direction, are configured and operated in a specific direction, and thus, cannot be construed as limiting the present application.

In the description of the embodiments of the present application, unless expressly stated or limited otherwise, the terms "connected," "connected," and "mounted" are to be construed broadly, e.g., the term "connected" may be a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The embodiments described herein are exemplary rather than limiting and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are possible. Any feature or element of any embodiment may be used in combination with or instead of any other feature or element in any other embodiment, unless expressly limited otherwise.

The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements that have been disclosed in this application may also be combined with any conventional features or elements to form unique aspects as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other aspects to form another unique aspect as defined by the claims. Thus, it should be understood that any of the features shown and/or discussed in this application may be implemented alone or in any suitable combination. Accordingly, the embodiments are not limited except as by the appended claims and their equivalents. Furthermore, various modifications and changes may be made within the scope of the appended claims.

Claims (10)

1. A PVT sample tube switching piston dismounting device is used for dismounting a switching piston on a PVT sample tube, the switching piston is arranged at a first end of the PVT sample tube, high-pressure nitrogen is arranged on the inner side of the switching piston, an annular rear end plug is arranged on the outer side of the switching piston, an internal thread matched with the rear end plug is arranged on the inner wall of the PVT sample tube, the device is characterized by comprising a hydraulic device, a fixing device and a threaded ring, the fixing device is used for fixing the PVT sample tube and the hydraulic device, and the output end of the hydraulic device penetrates through the rear end plug and abuts against the switching piston,

after the rear plug is detached, the threaded ring is installed in the first end of the PVT sample cylinder through matching with the internal thread,

the length of the internal thread is larger than that of the threaded ring, and after the threaded ring is installed, a part of the internal thread is reserved between the threaded ring and the switching piston.

2. The PVT sample cylinder adapter piston dismounting device as claimed in claim 1, wherein a sealing ring is arranged on the outer circumferential surface of the adapter piston, the distance between the sealing ring and the outer end surface of the adapter piston is L1, the length of the internal thread portion reserved between the threaded ring and the adapter piston is L2, and L2 is not less than L1.

3. The PVT sample cylinder adapter piston dismounting device of claim 1, wherein the threaded ring is provided with a first notch, and the threaded ring is sleeved on the output end of the hydraulic device through the first notch.

4. The PVT cylinder adapter piston disassembly apparatus of any of claims 1 to 3, wherein the hydraulic means comprises a hydraulic cylinder and a hand pump, the hand pump being connected to the hydraulic cylinder via a reversing valve.

5. The PVT sample cylinder adapter piston disassembly device of claim 4, wherein the hand pump is disposed at a location distal from the first end of the PVT sample cylinder.

6. The PVT sample cylinder adapter piston dismounting device of claim 4, wherein the hydraulic device further comprises an extension bar disposed at the output end of the hydraulic cylinder, the extension bar passing through the rear plug and abutting against the adapter piston.

7. The PVT sample cylinder adapter piston dismounting device of any one of claims 1 to 3, wherein the fixing device comprises an operation table, a PVT sample cylinder fixing ring and a hydraulic cylinder fixing ring,

the PVT sample cylinder fixing ring and the hydraulic cylinder fixing ring are used for fixing the PVT sample cylinder and the hydraulic cylinder on the operating platform respectively.

8. The PVT sample cylinder adapter piston dismounting device as claimed in any one of claims 1 to 3, further comprising a dismounting rod, wherein the dismounting rod is provided with a positioning portion and is used for dismounting the threaded ring and the rear plug.

9. The PVT sample cylinder adapter piston disassembly apparatus of claim 8, wherein the disassembly bar is provided with a second notch.

10. The PVT sample cylinder adapter piston disassembly device of any one of claims 1 to 3, further comprising a protective cap mounted at the first end of the PVT sample cylinder.

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