CN213510523U - Hydraulic balancing device of oil pipe cutter - Google Patents
Hydraulic balancing device of oil pipe cutter Download PDFInfo
- Publication number
- CN213510523U CN213510523U CN202121155213.3U CN202121155213U CN213510523U CN 213510523 U CN213510523 U CN 213510523U CN 202121155213 U CN202121155213 U CN 202121155213U CN 213510523 U CN213510523 U CN 213510523U
- Authority
- CN
- China
- Prior art keywords
- pressure
- joint
- piston
- oil
- inner cavity
- 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.)
- Active
Links
Images
Abstract
The utility model discloses a hydraulic balance device of an oil pipe cutter, which relates to the technical field of oil pipe cutters and comprises a pressure-bearing joint, a balance shell, a liquid-passing pipe, a piston, a spring and a lower joint, wherein the upper end of the balance shell is fixedly connected with the pressure-bearing joint, and the lower end of the balance shell is fixedly connected with the lower joint; an oil filling hole is formed in the side wall of the pressure-bearing joint, the liquid passing pipe is arranged in the inner cavity of the balance shell, the upper end of the liquid passing pipe is in butt joint with the inner cavity of the pressure-bearing joint, and the lower end of the liquid passing pipe is in butt joint with the inner cavity of the lower joint; the piston is arranged in an annular space between the liquid passing pipe and the balance shell in a sliding and sealing mode, the spring is sleeved on the outer side of the liquid passing pipe, the upper end of the spring is fixed to the lower end of the pressure-bearing joint, and the lower end of the spring is fixed to the piston; a trigger check valve with a thimble is arranged in the piston, and when the thimble of the trigger check valve contacts the lower connector, the trigger check valve is opened; the device can effectively balance the internal pressure and the external pressure of the underground instrument, thereby protecting internal devices of the instrument and avoiding the deformation of the internal devices of the instrument caused by the pressure difference between the internal pressure and the external pressure.
Description
Technical Field
The utility model relates to an oil pipe cutterbar technical field, concretely relates to hydraulic balance device of oil pipe cutterbar.
Background
Aiming at accidents such as drilling jamming of an oil pipe casing pipe column and the like which may occur in the current well repairing process, the pipe is generally unlocked through basic procedures such as powerful lifting, movable lifting and the like on site, and if the pipe column cannot be unlocked, the oil pipe is lifted out of the well in a mode of cutting off the pipe column.
At present, several modes can be selected for underground cutting of an oil well, including mechanical cutting, jet cutting, hydraulic cutting, energy-gathering cutting, chemical cutting, cable cutting and the like; both hydraulic cutting and mechanical cutting need to depend on the cooperation of relevant hydraulic equipment and downhole tool strings, and in the process of downhole operation, due to the pressure difference existing inside and outside the instrument, the problem that devices are easy to deform and damage is solved.
Therefore, it is urgently needed to develop an internal and external pressure balancing device for a downhole instrument.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a hydraulic pressure balancing unit of oil pipe cutterbar to the defect that prior art exists.
The technical scheme of the utility model is that: a hydraulic balance device of an oil pipe cutter comprises a pressure-bearing joint, a balance shell, a liquid-passing pipe, a piston, a spring and a lower joint, wherein the upper end of the balance shell is fixedly connected with the pressure-bearing joint, and the lower end of the balance shell is fixedly connected with the lower joint; an oil filling hole is formed in the side wall of the pressure-bearing joint, an oil inlet channel communicated with the inner cavity of the balance shell is formed in the pipe wall of the pressure-bearing joint, the oil filling hole is communicated with the oil inlet channel, an oil plug is installed in the oil filling hole, and a first one-way valve is arranged in the oil inlet channel; a passage for communicating the inner cavity of the pressure-bearing joint with the inner cavity of the balance shell is arranged in the pipe wall of the lower part of the pressure-bearing joint, and a plurality of oil discharge holes are arranged on the pipe wall of the lower part of the balance shell;
the liquid passing pipe is arranged in the inner cavity of the balance shell, the upper end of the liquid passing pipe is in butt joint with the inner cavity of the pressure-bearing joint, and the lower end of the liquid passing pipe is in butt joint with the inner cavity of the lower joint; the piston is arranged in an annular space between the liquid passing pipe and the balance shell in a sliding and sealing mode, the spring is sleeved on the outer side of the liquid passing pipe, the upper end of the spring is fixed to the lower end of the pressure-bearing joint, and the lower end of the spring is fixed to the piston; a trigger one-way valve with a thimble is arranged in the piston, the inlet end of the trigger one-way valve is positioned on the upper end surface of the piston, and the outlet end of the trigger one-way valve is positioned on the lower end surface of the piston; when the thimble of the touch check valve contacts the lower connector, the touch check valve is opened.
Preferably, the upper end of the pressure-bearing joint is fixedly connected with a short section, and an upper plug and a lower plug which are used for connecting an upper instrument and a lower instrument are respectively arranged in the short section and the lower joint.
Preferably, the touch one-way valve comprises a valve seat and an ejector pin, the valve seat is fixedly installed in the inlet end of the touch one-way valve, the ejector pin is arranged in the outlet end of the touch one-way valve in a sliding manner, the upper part of the ejector pin is a sleeve, and the lower part of the ejector pin is a relatively thin needle-shaped body; the needle-shaped body is in clearance fit with the valve wall, the thimble is movably sleeved on the valve seat through the sleeve, a compression spring is arranged between the thimble and the valve seat, and oil delivery through holes are formed in the valve seat and the wall of the sleeve.
Preferably, a plurality of sealing rings are arranged between the piston and the inner wall of the balance shell and between the piston and the liquid passing pipe.
Preferably, the balance shell, the pressure-bearing joint and the lower joint are provided with sealing rings, and the joint of the liquid passing pipe and the inner cavity of the lower joint is provided with a sealing ring.
Preferably, the sealing ring is an O-ring.
Compared with the prior art, the utility model, have following advantage:
the device can be used as a part of an underground oil pipe cutter and is a hydraulic balance part of the oil pipe cutter; the device has simple structure and strong practicability, and the internal and external pressure difference of the underground instrument can be quickly balanced by driving the piston to move back and forth through hydraulic oil and the spring; the device can effectively balance the internal pressure and the external pressure of the underground instrument, thereby protecting internal devices of the instrument and avoiding the deformation of the internal devices of the instrument caused by the pressure difference between the internal pressure and the external pressure.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the trigger check valve;
FIG. 3 is an enlarged schematic view of the upper half of the present invention;
fig. 4 is an enlarged schematic view of the lower half part of the present invention.
In the figure: 1. pressure-bearing joint, 101, passage, 2, balance shell, 201, oil discharge hole, 3, liquid passing pipe, 4, piston, 5, spring, 6, lower joint, 7, oil plug, 8, first check valve, 9, touch check valve, 10, short joint, 11, upper plug, 12, lower plug, 13, valve seat, 14, thimble, 1401, sleeve, 1402, needle, 15 and compression spring.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Example one
Referring to fig. 1, the hydraulic balance device of the oil pipe cutter comprises a pressure-bearing joint 1, a balance shell 2, a liquid passing pipe 3, a piston 4, a spring 5 and a lower joint 6, wherein the upper end of the balance shell 2 is fixedly connected with the pressure-bearing joint 1, and the lower end of the balance shell is fixedly connected with the lower joint 6; an oil filling hole is formed in the side wall of the pressure-bearing joint 1, an oil inlet channel communicated with the inner cavity of the balance shell 2 is formed in the pipe wall, the oil filling hole is communicated with the oil inlet channel, an oil plug 7 is installed in the oil filling hole, and a first one-way valve 8 is arranged in the oil inlet channel; a passage 101 for communicating the inner cavity of the pressure-bearing joint 1 with the inner cavity of the balance shell 2 is arranged in the pipe wall of the lower part of the pressure-bearing joint 1, and a plurality of oil discharge holes 201 are arranged on the pipe wall of the lower part of the balance shell 2;
the liquid passing pipe 3 is arranged in the inner cavity of the balance shell 2, the upper end of the liquid passing pipe is in butt joint with the inner cavity of the pressure-bearing joint 1, and the lower end of the liquid passing pipe is in butt joint with the inner cavity of the lower joint 6; the piston 4 is arranged in an annular space between the liquid passing pipe 3 and the balance shell 2 in a sliding and sealing mode, the spring 5 is sleeved on the outer side of the liquid passing pipe 3, the upper end of the spring is fixed to the lower end of the pressure-bearing joint 1, the lower end of the spring is fixed to the piston 4, and the spring 5 is a tension spring; a 14-type touch one-way valve 9 with a thimble is arranged in the piston 4, the inlet end of the touch one-way valve 9 is positioned on the upper end surface of the piston 4, and the outlet end of the touch one-way valve 9 is positioned on the lower end surface of the piston 4; when the thimble 14 of the trigger check valve 9 contacts the lower connector 6, the trigger check valve 9 is opened.
In more detail, the upper end of the pressure-bearing joint 1 of the present embodiment is fixedly connected with a short joint 10, and an upper plug 11 and a lower plug 12 for connecting an upper instrument and a lower instrument are respectively arranged in the short joint 10 and the lower joint 6.
The device is a part of an underground oil pipe cutter and is a hydraulic balance part of the oil pipe cutter; when the device is used, the device is firstly assembled on a well and is installed on an oil pipe cutter, then hydraulic oil is injected into the device through the oil injection hole, and a small amount of air is stored in the hydraulic oil; stopping injecting oil when a thimble 14 triggering a one-way valve 9 in the piston 4 just contacts the lower joint 6, and then plugging an oil injection hole by using an oil plug 7; after the device is put into a well, the pressure in the well is higher than the pressure in the inner cavity of the device, oil outside the device enters the inner cavity of the balance shell 2 at the lower part of the piston 4 through the oil discharge hole 201 and pushes the piston 4 to compress air inside hydraulic oil upwards, and when the piston 4 stops moving, the pressure inside and outside the device is balanced; after the well is put in for a period of time, because the underground temperature is higher, the hydraulic oil in the inner cavity of the device can be heated and expanded, at the moment, the pressure of the inner cavity is greater than the external pressure, and at the moment, the hydraulic oil can overcome the elastic force of the spring 5 to push the piston 4 downwards; when the piston 4 contacts with the lower connector 6, the lower connector 6 touches the thimble 14, at the moment, the one-way valve 9 is touched to open and discharge oil outwards through the oil discharge hole 201, and the internal and external pressure of the device after oil discharge reaches balance; the device maintains the pressure balance inside and outside the device through the back and forth movement of the piston 4.
The device has simple structure and strong practicability, and the piston 4 is driven by the hydraulic oil and the spring 5 to move back and forth, so that the internal and external pressure difference of the underground instrument can be quickly balanced; the device can effectively balance the internal pressure and the external pressure of the underground instrument, thereby protecting internal devices of the instrument and avoiding the deformation of the internal devices of the instrument caused by the pressure difference between the internal pressure and the external pressure.
Example two
As a preferred embodiment of the present invention, the present embodiment optimizes the touch check valve 9 in the piston 4 on the basis of the first embodiment, specifically:
referring to fig. 2, the triggering check valve 9 of the present embodiment includes a valve seat 13 and an ejector pin 14, the valve seat 13 is fixedly installed in an inlet end of the triggering check valve 9, the ejector pin 14 is slidably disposed in an outlet end of the triggering check valve 9, an upper portion of the ejector pin 14 is a sleeve 1401, and a lower portion of the ejector pin 14 is a relatively thin needle 1402; the needle-shaped body 1402 is in clearance fit with the valve wall, the thimble 14 is movably sleeved on the valve seat 13 through the sleeve 1401, a compression spring 15 is arranged between the thimble 14 and the valve seat 13, and oil delivery through holes are formed in the pipe walls of the valve seat 13 and the sleeve 1401.
When the lower connector 6 triggers the thimble 14, the thimble 14 extrudes the compression spring 15 to approach the valve seat 13, and triggers the one-way valve 9 to be switched on; the hydraulic oil enters the sleeve 1401 from the valve seat 13 through the oil delivery through hole on the valve seat 13, then flows into the gap between the needle 1402 and the valve wall through the oil delivery through hole on the sleeve 1401, and finally flows out of the device through the oil discharge hole 201.
EXAMPLE III
As a preferred embodiment of the present invention, the sealing performance of the present device is optimized on the basis of the second embodiment, specifically as follows:
referring to fig. 3-4, in the embodiment, a plurality of sets of sealing rings are respectively arranged between the piston 4 and the inner wall of the balance housing 2 and between the piston and the liquid passing tube 3, the sealing rings are respectively arranged at the joints of the balance housing 2 and the pressure-bearing joint 1 and the lower joint 6, and the sealing rings are arranged at the joints of the liquid passing tube 3 and the inner cavity of the lower joint 6; the seal ring of the present embodiment is an O-ring seal.
The sealing washer that sets up in this device can prevent that the hydraulic oil in the device inner chamber from discharging through the gap between each part, and then avoids this hydraulic balance device effect to weaken, and gravel, fluid in the pit also can be prevented to these sealing washers simultaneously and enter into the device inner chamber through each gap.
The present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge range of those skilled in the art without departing from the spirit of the present invention, and the changed contents still belong to the protection scope of the present invention.
Claims (6)
1. The utility model provides a hydraulic pressure balancing unit of oil pipe cutterbar which characterized in that: the balance device comprises a pressure-bearing joint, a balance shell, a liquid-passing pipe, a piston, a spring and a lower joint, wherein the upper end of the balance shell is fixedly connected with the pressure-bearing joint, and the lower end of the balance shell is fixedly connected with the lower joint; an oil filling hole is formed in the side wall of the pressure-bearing joint, an oil inlet channel communicated with the inner cavity of the balance shell is formed in the pipe wall of the pressure-bearing joint, the oil filling hole is communicated with the oil inlet channel, an oil plug is installed in the oil filling hole, and a first one-way valve is arranged in the oil inlet channel; a passage for communicating the inner cavity of the pressure-bearing joint with the inner cavity of the balance shell is arranged in the pipe wall of the lower part of the pressure-bearing joint, and a plurality of oil discharge holes are arranged on the pipe wall of the lower part of the balance shell;
the liquid passing pipe is arranged in the inner cavity of the balance shell, the upper end of the liquid passing pipe is in butt joint with the inner cavity of the pressure-bearing joint, and the lower end of the liquid passing pipe is in butt joint with the inner cavity of the lower joint; the piston is arranged in an annular space between the liquid passing pipe and the balance shell in a sliding and sealing mode, the spring is sleeved on the outer side of the liquid passing pipe, the upper end of the spring is fixed to the lower end of the pressure-bearing joint, and the lower end of the spring is fixed to the piston; a trigger one-way valve with a thimble is arranged in the piston, the inlet end of the trigger one-way valve is positioned on the upper end surface of the piston, and the outlet end of the trigger one-way valve is positioned on the lower end surface of the piston; when the thimble of the touch check valve contacts the lower connector, the touch check valve is opened.
2. The hydraulic balancing device of a tubing cutter as claimed in claim 1, wherein: the pressure-bearing connector is characterized in that the upper end of the pressure-bearing connector is fixedly connected with a short section, and an upper plug and a lower plug which are used for connecting an upper instrument and a lower instrument are respectively arranged in the short section and the lower connector.
3. The hydraulic balancing device of a tubing cutter as claimed in claim 1, wherein: the touch one-way valve comprises a valve seat and an ejector pin, the valve seat is fixedly arranged in an inlet end of the touch one-way valve, the ejector pin is arranged in an outlet end of the touch one-way valve in a sliding mode, the upper portion of the ejector pin is a sleeve, and the lower portion of the ejector pin is a relatively thin needle-shaped body; the needle-shaped body is in clearance fit with the valve wall, the thimble is movably sleeved on the valve seat through the sleeve, a compression spring is arranged between the thimble and the valve seat, and oil delivery through holes are formed in the valve seat and the wall of the sleeve.
4. The hydraulic balancing device of a tubing cutter as claimed in claim 1, wherein: and a plurality of sealing rings are arranged between the piston and the inner wall of the balance shell and between the piston and the liquid passing pipe.
5. The hydraulic balancing device of a tubing cutter as claimed in claim 1, wherein: the balance shell is provided with a sealing ring at the joint of the pressure-bearing joint and the lower joint, and the joint of the liquid passing pipe and the inner cavity of the lower joint is provided with a sealing ring.
6. The hydraulic balancing device for a tubing cutter according to claim 4 or 5, wherein: the sealing ring is an O-shaped sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121155213.3U CN213510523U (en) | 2021-05-27 | 2021-05-27 | Hydraulic balancing device of oil pipe cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121155213.3U CN213510523U (en) | 2021-05-27 | 2021-05-27 | Hydraulic balancing device of oil pipe cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213510523U true CN213510523U (en) | 2021-06-22 |
Family
ID=76429449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121155213.3U Active CN213510523U (en) | 2021-05-27 | 2021-05-27 | Hydraulic balancing device of oil pipe cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213510523U (en) |
-
2021
- 2021-05-27 CN CN202121155213.3U patent/CN213510523U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105050773B (en) | Hydraulic hammer with impact system sub-component | |
| CN107701147B (en) | Annulus pressure underground control valve | |
| CN112324389A (en) | While-drilling bypass injection tool | |
| CN213510523U (en) | Hydraulic balancing device of oil pipe cutter | |
| US4015662A (en) | Well tool which changes reciprocating movement to rotary motion | |
| CN116335579B (en) | Oil field well casing packer and non-cementing injection self-plugging staged fracturing method | |
| CN210049870U (en) | Hydraulic control constant pressure backwashing valve | |
| CA2988969A1 (en) | Testable back pressure valves | |
| CN109488252B (en) | Environment-friendly anti-overflow liquid controlling means | |
| CN116733421A (en) | Hydraulic ball throwing device for well drilling coring and well drilling coring process | |
| CN113090226B (en) | Bridge plug control switch | |
| CN201277164Y (en) | Oil-draining lubricator type oil pump | |
| CN212958562U (en) | Repeatedly usable's rotation type bleeder | |
| CN114427438B (en) | Multifunctional pressure testing device for shaft | |
| CN112127837A (en) | Hydraulic power assembly and hydraulic sand blasting slotting fracturing string | |
| CN110206509B (en) | Water level differential pressure control valve | |
| CN113323627A (en) | Differential pressure sliding sleeve and oil-gas well fracturing construction method | |
| CN217354330U (en) | Adjustable pressure well-washing type under-pressure blanking plug | |
| CN115075756B (en) | Sand washing device for gas well | |
| CN114439417B (en) | Hydraulic control rubber cylinder type bidirectional well flushing valve and method | |
| RU2125148C1 (en) | Packer | |
| CN109779547A (en) | A kind of down-hole fluid flow commutation tool | |
| CN212428766U (en) | Water injection nozzle and water injection equipment | |
| CN211777289U (en) | Pressure opening closed well washing valve for pumping well | |
| CN218407390U (en) | Circulating sliding sleeve for speed pipe column |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Zetian Inventor after: Zhang Kai Inventor after: Xu Peng Inventor after: Li Zhenfu Inventor after: Mao Xuewei Inventor before: Li Zetian Inventor before: Zhang Kai Inventor before: Fan Yubin Inventor before: Xu Peng Inventor before: Li Zhenfu Inventor before: Mao Xuewei Inventor before: Yuan Lin |