CN212479101U - A conventional sample nipple joint for oil instrument in pit - Google Patents
A conventional sample nipple joint for oil instrument in pit Download PDFInfo
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- CN212479101U CN212479101U CN202020973160.5U CN202020973160U CN212479101U CN 212479101 U CN212479101 U CN 212479101U CN 202020973160 U CN202020973160 U CN 202020973160U CN 212479101 U CN212479101 U CN 212479101U
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Abstract
The utility model discloses a conventional sample nipple joint for oil instrument in pit, include: the main body is provided with two sample channels, two hydraulic channels and a mounting seat, one end of the main body is provided with a joint, and the other end of the main body is provided with an external thread joint; the valve seat is arranged in the mounting seat, and is provided with an electromagnetic valve, a hydraulic valve and a control assembly; the sampling tube comprises a first sample tube and a second sample tube, wherein the first sample tube and the second sample tube are mutually connected through a double-thread joint and are connected with a main body through one end, a sampling hole and a valve hole which are respectively communicated with two sample channels are formed in one end of an external thread joint of the main body, a sealing plug is arranged in the sampling hole, and a high-pressure stop valve is arranged in the valve hole. The utility model discloses an install two sample section of thick bamboos on main substrate, realize once going into the well and can accomplish twice sampling, improved sampling efficiency. Meanwhile, the pressure in the sample cylinder can be kept unchanged by utilizing the matching of the sealing plug and the high-pressure stop valve, so that the pressure of the stratum where the sample is located can be obtained simultaneously during sampling.
Description
Technical Field
The utility model relates to a petroleum well field of down sampling especially relates to a conventional sample nipple joint that once goes into the well and realizes twice sampling and can accurately acquire sampling point formation pressure.
Background
The equipment of sample in the pit is realized to present oil industry, uses the sampling nipple joint to cooperate the sample more, and the sampling nipple joint is connected with sampling equipment, realizes sample passageway and hydraulic channel's on-off control through solenoid valve, the control assembly on the sampling nipple joint, makes the sample preserve in the sampling nipple joint, then retrieves and carries out sample detection to the pit.
The current sampling pup joint is equipped with one or two sampling cylinders for storing samples collected at a specified stratum. However, most of sampling cylinders on the sampling pup joint adopt a structure for directly storing samples, and when the sampling cylinders of the structure are used for sampling in the well, samples can only be obtained, the formation pressure value at the sampling position of the samples cannot be obtained, or the error of the obtained formation pressure value is very large, so that the final sample analysis precision is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a conventional sampling nipple joint that relates to a once go into the well and realize twice sampling and can accurately acquire sampling point formation pressure.
Specifically, the utility model provides a conventional sample nipple joint for oil instrument in pit, include:
the main body is a cylinder, two sample channels and two hydraulic channels are arranged in the main body, an inwards concave mounting seat is arranged on the outer circular surface, a connector connected with other equipment is mounted at one end of the main body, and an external thread connector is arranged at the other end of the main body;
the valve seat is arranged in the mounting seat, the outer surface of the valve seat is in an arc shape consistent with the appearance of the main body, and the valve seat is internally and respectively provided with an electromagnetic valve for controlling the on-off of the hydraulic channel, hydraulic valves for respectively controlling the on-off of the two sample channels, and a control assembly for controlling the hydraulic valve through the electromagnetic valve;
the sampling tube comprises a first sample tube and a second sample tube, wherein the first sample tube and the second sample tube are mutually connected through a double-thread joint, then the first sample tube and the second sample tube are respectively communicated with two sample channels on a main body through internal sample channels, one end of the external thread joint of the main body is provided with a sampling hole and a valve hole which are respectively communicated with the two sample channels, a sealing plug is arranged in the sampling hole, and a high-pressure stop valve is arranged in the valve hole.
The utility model discloses an in one embodiment, the inside of first sample section of thick bamboo is provided with the first piston that can follow the endwise slip removal, and first piston will the inside of first sample section of thick bamboo divide into the first collection chamber that holds the sample and the first liquid chamber that holds liquid in the pit, first collection chamber through sample passageway direct with sample access connection in the main base, first liquid chamber is through setting up liquid passageway in the double thread joint directly communicates with each other with the outside.
The utility model discloses an in an embodiment, the inside of second sample section of thick bamboo is provided with the second piston that can follow the endwise slip removal, and the second piston will the inside of second sample section of thick bamboo divide into the second that holds the sample and gathers the chamber and hold the second liquid cavity of liquid in the pit, and the second is gathered the chamber and is in through setting up sample passageway and setting in the double thread joint sample passageway in the first sample section of thick bamboo lateral wall with the corresponding sample passageway intercommunication in the main base, the second sample section of thick bamboo is kept away from the one end of double thread joint is sealed through sealed end cap, and the second liquid cavity directly communicates with each other with the outside through the liquid passageway that sets up in sealed end cap.
The utility model discloses an in an embodiment, the thief hole is taking off sealed stifled back supplies outside sampling equipment to connect.
In an embodiment of the present invention, the high pressure stop valve is used for sealing the corresponding sample channel when the external sampling device is connected to the sampling hole, so as to prevent pressure leakage.
In one embodiment of the present invention, the connector further comprises a protective cap screwed to one end of the main body and accommodating the connector therein.
In an embodiment of the present invention, a handle is installed at one end of the main body, which is away from the protective cap, for facilitating gripping.
In an embodiment of the present invention, the mounting seat is provided with a groove for accommodating each corresponding component on the valve seat, respectively, on a surface of the mounting seat contacting with the valve seat.
The utility model discloses an in an embodiment be provided with respectively with the connector of inside each passageway intercommunication on the surface of disk seat, be located two sample passageway's in the disk seat play appearance mouth is located respectively the axial both ends of disk seat, and protrusion in the disk seat, the opening orientation of play appearance mouth the mount pad, and the cartridge has the switching pipe on a appearance mouth, the installation switching pipe behind the disk seat respectively with corresponding sample passageway import grafting on the mount pad.
In an embodiment of the present invention, the valve seat is fixed to the main body by means of arc-shaped pressing covers respectively fitted to the sample outlet.
The utility model discloses an install two sample section of thick bamboos on main substrate, realize once going into the well and can accomplish twice sampling, improved sampling efficiency. Meanwhile, the pressure in the sample cylinder can be kept unchanged by utilizing the matching of the sealing plug and the high-pressure stop valve, so that the pressure of the stratum where the sample is located can be obtained simultaneously during sampling, and more support data can be provided for later-stage sample analysis.
Drawings
FIG. 1 is a schematic structural diagram of a conventional sampling nipple according to an embodiment of the present invention;
fig. 2 is a schematic diagram of the internal structure of a conventional sampling nipple according to an embodiment of the present invention.
Detailed Description
The following provides a more detailed description of the embodiments of the present invention with reference to the accompanying drawings.
As shown in fig. 1 and 2, in one embodiment of the present invention, a conventional sampling nipple 100 for a downhole petroleum instrument is disclosed, which comprises a main body 1, a valve seat 2 and a sampling cylinder 3.
The structure of the present embodiment will be described below with the left side facing the screen as the left side of the main body 1 and the right side as the right side of the main body 1. In addition, the hydraulic and sample passages are arranged with the structure of the valve seat and the mounting seat, and are not specific, and thus specific locations thereof will not be described or labeled in the following description. The two solenoid valves and the hydraulic valve are located in the valve seat, and the structure and the working mode of the two solenoid valves and the hydraulic valve are the same as those in the prior art, and the detailed description is not provided here.
The main substrate 1 is a cylinder, two independent hydraulic channels and two independent sample channels are arranged in the main substrate, an inwards concave mounting seat 11 is arranged in the middle of the main substrate, a connector 4 connected with other equipment is installed at the left end of the mounting seat 11, and an external thread connector 12 with external threads is arranged at the right end of the mounting seat; the valve seat 2 is arranged in the mounting seat 11 in a clamping manner, the outer surface of the valve seat is arc-shaped and consistent with the appearance of the main base body 1, electromagnetic valves for respectively controlling the on-off of two hydraulic channels and two hydraulic valves respectively connected with the two hydraulic channels and controlling the on-off of corresponding sample channels are arranged in the valve seat 2 through the electromagnetic valve mounting seat 21, one hydraulic valve is respectively arranged on the two hydraulic valve mounting seats 23 and 24 on the valve seat 2, and a power supply connector 22 for connecting a power supply and a control assembly 25 for controlling the working of the electromagnetic valves are arranged at the same time;
the sampling tube 3 comprises a first sample tube 31 and a second sample tube 32, the first sample tube 31 and the second sample tube 32 are connected with each other by a double-thread joint 33 and then connected with the external thread joint 12 of the main body 1 through the left end, the first sample tube 31 and the second sample tube 32 are correspondingly communicated with two sample channels on the main body 1 through internal sample channels respectively, one end of the external thread joint 12 of the main body 1 is provided with a sampling hole 121 and a valve hole 122 which are respectively communicated with the two sample channels, the two sampling holes 121 are internally provided with sealing plugs 123 respectively, and the two valve holes 122 are internally provided with high-pressure stop valves 124 respectively.
The mounting seat 11 is provided with various clamping grooves corresponding to all the parts on the valve seat 2, the valve seat 2 is fixed on the mounting seat 11 through bolts and a fixing clamp 6, two electromagnetic valves and two hydraulic valves form an independent control pipeline with the first sample cylinder 31 and the second sample cylinder 32 respectively, the valve seat 2 and a hydraulic channel and a sample channel in the mounting seat 11 are communicated with each other after installation, the hydraulic channel and the sample channel are provided with corresponding connecting ports 26 on the outer surface of the valve seat 2, and the connecting ports 26 are used for being connected with an external oil pipeline and a sample input pipeline. When the electromagnetic valve is electrified, the hydraulic oil circuit controlled by the electromagnetic valve is opened, so that the hydraulic valves on the corresponding routes can be controlled to be opened and closed through the hydraulic oil, the corresponding sample channels are switched on and off, and the electrification of the electromagnetic valve is controlled by the control assembly 25 according to the sampling process.
During sampling, taking the sampling process of the first sampling cylinder 31 as an example, after the dual-cylinder sampling pup joint 100 is lowered to a specified position in a well, sampling equipment starts to sample the current stratum, at the moment, the control assembly 25 opens the electromagnetic valve on the left side to enable the hydraulic channel controlled by the electromagnetic valve to feed oil, hydraulic oil of the hydraulic channel enters the oil lifting cavity in the hydraulic valve on the left side, the hydraulic valve is jacked up by the pressure of the hydraulic oil to enable the sample channel closed by the hydraulic valve to be opened, a sample collected by the sampling equipment enters the sample channel in the valve seat 2 through the sample input pipeline through the connecting port 26, and flows into the first sampling cylinder 31 along the sample channel opened on the left side; in this process, the right-hand solenoid valve is in a power-off state, and therefore, the sample passage controlled by the right-hand hydraulic valve is in a closed state.
When the pressure of the first sample cylinder 31 reaches a predetermined value (i.e. when the first sample cylinder is full), the control assembly 25 controls the left electromagnetic valve to change the flow direction of the hydraulic oil in the hydraulic channel, so that the hydraulic oil enters the oil dropping cavity of the left hydraulic valve, drives the hydraulic valve to drop and finally closes the sample channel controlled by the hydraulic valve, and then the control assembly 25 disconnects the left electromagnetic valve to electrify, thereby completing a sampling process.
And continuously controlling the sampling equipment to take the double-cylinder sampling pup joint 100 to descend, continuously sampling when the sampling equipment arrives at the next sampling site, controlling the electromagnetic valve on the right side to be electrified by the control assembly 25 at the moment, enabling the hydraulic valve on the right side to rise, enabling the sample to enter the second sample cylinder cavity 32, and keeping the state of closing the sample channel of the hydraulic valve on the left side at all times, wherein the specific process is consistent with that of the first sampling cylinder and is not repeated.
When the first sample cylinder 31 and the second sample cylinder 32 are full of samples, the dual-cylinder sampling sub 100 can be adjusted back to the well for sampling. In the sampling process, the high-pressure stop valves 124 on the first sample cylinder 31 and the second sample cylinder 32 are firstly closed, so that the two sample channels are in a closed state, then the two sealing plugs 123 are respectively unscrewed, and the two high-pressure stop valves 124 are opened after the sampling pipeline is connected.
This embodiment realizes once going into the well and accomplishes twice sampling through installing two sample barrels on main substrate, has improved sampling efficiency. Meanwhile, the pressure in the sample cylinder can be kept unchanged by utilizing the matching of the sealing plug and the high-pressure stop valve, so that the pressure of the stratum where the sample is located can be obtained simultaneously during sampling, and more support data can be provided for later-stage sample analysis.
Through the movably mounted valve seat 2, the installation and the later maintenance of each part can be simplified, and the main base body 1 is easier to process. Two sets of electromagnetic valves and hydraulic valves are used for respectively controlling the two sample cylinders, so that the two sample cylinders can be independently sampled, and the sampling is carried out twice in one-time well descending, thereby improving the sampling efficiency.
The utility model discloses an in an embodiment, first sample section of thick bamboo 31 is whole to be the hollow tube unanimous with main base member 1 diameter, both ends are provided with the internal thread of being connected with external screw thread joint 12 and two screw thread joint 33 respectively, be provided with the first piston 311 that can follow the endwise slip and remove inside, first piston 311 divides the inside of first sample section of thick bamboo 31 into the first collection chamber 312 that holds the sample and holds down in the pit first liquid chamber 313 of liquid, first collection chamber 312 is direct to be communicated with the sample passageway in the main base member 1, first liquid chamber 313 directly communicates with each other with the outside through the liquid passageway 331 that sets up in two screw thread joint 33.
During sampling, the first sample cylinder 31 enters the first liquid chamber 313 from the liquid passage 331 on the double-threaded joint 33 during the process of going down to the downhole, and pushes the first piston 311 to move to the left until the first piston 311 is pressed against the male connector 12. When sampling is performed, under the control of the electromagnetic valve and the hydraulic valve, a sample enters the first collection cavity 312 through a sample passage in the main body 1, and as the pressure increases to be greater than the current formation pressure, the sample in the first collection cavity 312 pushes the first piston 311 to move towards the first liquid cavity 313, and liquid in the first liquid cavity 313 is extruded out of the first liquid cavity 313 through the liquid passage 331 in the double-thread joint 33 until the first piston 311 reaches the double-thread joint 33, so that the sampling process is completed.
The first piston 311 is provided with a plurality of sealing rings on the outer circumference contacting the first sample cylinder 31 to prevent the mixing of the downhole fluid and the sample while preventing the pressure inside the first sample cylinder 31 from leaking. During sampling, the sealing plug 123 and the high-pressure stop valve 124 on the sample channel do not affect the normal passing of the sample. An axial sample channel 314 is provided in the side wall of the first sample barrel 31, and the left end of the sample channel 314 is communicated with the sample channel on the main body 1, and the right end is communicated with a sample channel 332 provided in the double-threaded joint 33, so that the sample flowing from the main body 1 can enter the second sample barrel 32.
The connection structure of this embodiment is simple, and the flow of sample and downhole liquid is conveniently controlled, and the pressure balance in the first sample cylinder 31 is realized by automatically feeding in and out the downhole liquid through the first liquid cavity 313.
In another embodiment of the present invention, the second sample cylinder 32 is a hollow tube with a diameter consistent with that of the main body 1, two ends of the hollow tube are respectively provided with an internal thread, the right end of the second sample cylinder 32 is sealed by a sealing plug 34 with an external thread, and the left end is connected with the double-thread joint 33 through an internal thread. A second piston 321 which can slide and move along the axial direction is arranged in each second sample cylinder 32, the second piston 321 divides the interior of the second sample cylinder 32 into a second collection cavity 322 for containing a sample and a second liquid cavity 323 for containing liquid in the well, the second collection cavity 322 is communicated with a corresponding sample channel in the main body 1 through a sample channel 332 arranged in the double-thread joint 33 and a sample channel 314 arranged in the side wall of the first sample cylinder 31, and the second liquid cavity 323 is directly communicated with the exterior through a liquid channel 341 arranged in the sealing plug 34.
The specific sampling process of the second sample cylinder 32 is the same as that of the first sample cylinder 31 and is not repeated here.
The utility model discloses an in an embodiment, for making things convenient for the pipeline intercommunication in pipeline on the disk seat 2 and the mount pad 11, the play appearance mouth 6 that is located two sample passageways in the disk seat 2 is located the axial both ends of disk seat 2 respectively, and protrusion in disk seat 2, the opening of play appearance mouth 6 is towards mount pad 11 direction, and the cartridge has switching pipe 5 on going out appearance mouth 6, switching pipe 5 has sealing washer and inside hollow movable plug connector on being outer circumference, its activity and sealed grafting are in play appearance mouth 6, after on the mount pad 11 is installed to disk seat 2, switching pipe 5 at both ends is sealed pegging graft with two sample passageway imports that correspond on the mount pad 11 respectively, accomplish the intercommunication of sample passageway in disk seat 2 and the mount pad 11 interior sample passageway.
In the embodiment, the sample channels on the valve seat 2 and the mounting seat 11 are communicated by utilizing a vertical insertion mode, so that intermediate connecting parts are reduced, and the internal structure is simplified.
The convex sample outlet 6 can also be used as a passive fixing point when the valve seat 2 is fixed, after the valve seat 2 is completely clamped on the mounting seat 11, the sample outlets 6 at two ends of the valve seat respectively extend out of one section, a gap is formed on the main body 1, the arc gland 7 in clearance fit with the gap is clamped in the gap, and then the stud is used for fixing the main body 1, the sample outlet 6 is clamped in the arc gland 7 at the moment, and the fixing effect of the valve seat 2 can be improved.
In an embodiment of the present invention, the main body 1 can be connected to other measuring instruments through the joint 4 connected to the left end, and the corresponding pipelines are kept connected. To protect the joint 4, a protective cap 8 screwed to the main body 1 and accommodating the joint 4 therein may be mounted at the joint 4. Meanwhile, the handle 81 for grabbing the whole conventional sampling pup joint 100 is conveniently installed at one end, far away from the main body 1, of the protective cap 8.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described in detail herein, many other variations and modifications can be made, consistent with the principles of the invention, which are directly determined or derived from the disclosure herein, without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. A conventional sampling sub for a downhole petroleum instrument, comprising:
the main body is a cylinder, two sample channels and two hydraulic channels are arranged in the main body, an inwards concave mounting seat is arranged on the outer circular surface, a connector connected with other equipment is mounted at one end of the main body, and an external thread connector is arranged at the other end of the main body;
the valve seat is arranged in the mounting seat, the outer surface of the valve seat is in an arc shape consistent with the appearance of the main body, and the valve seat is internally and respectively provided with an electromagnetic valve for controlling the on-off of the hydraulic channel, hydraulic valves for respectively controlling the on-off of the two sample channels, and a control assembly for controlling the hydraulic valve through the electromagnetic valve;
the sampling tube comprises a first sample tube and a second sample tube, wherein the first sample tube and the second sample tube are mutually connected through a double-thread joint, then the first sample tube and the second sample tube are respectively communicated with two sample channels on a main body through internal sample channels, one end of the external thread joint of the main body is provided with a sampling hole and a valve hole which are respectively communicated with the two sample channels, a sealing plug is arranged in the sampling hole, and a high-pressure stop valve is arranged in the valve hole.
2. The conventional sampling sub of claim 1,
the inside of first sample section of thick bamboo is provided with the first piston that can follow axial sliding movement, and first piston will the inside of first sample section of thick bamboo is divided into the first collection chamber that holds the sample and holds down the first liquid chamber of liquid, first collection chamber through sample passageway directly with the sample passageway in the main base is connected, first liquid chamber through set up the liquid passageway in the double thread joint directly communicates with each other with the outside.
3. The conventional sampling sub of claim 1,
the inside of second sample section of thick bamboo is provided with the second piston that can follow endwise slip and remove, and the second piston will the inside of second sample section of thick bamboo divide into the second that holds the sample and gathers the chamber and hold the second liquid body chamber of liquid in the pit, and the second is gathered the chamber and is in through setting up sample passageway in the double thread joint and setting sample passageway in the first sample section of thick bamboo lateral wall with the corresponding sample passageway intercommunication in the main base, the second sample section of thick bamboo is kept away from the one end of double thread joint is sealed through sealed end cap, and the second liquid body chamber directly communicates with each other with the outside through the liquid passageway that sets up in sealed end cap.
4. The conventional sampling sub of claim 1,
the sampling hole is taken down after the sealing plug is closed, and external sampling equipment is connected.
5. The conventional sampling sub of claim 4,
and the high-pressure stop valve is used for sealing the corresponding sample channel when external sampling equipment is connected with the sampling hole so as to prevent pressure leakage.
6. The conventional sampling sub of claim 1,
and a protective cap screwed to one end of the main body and accommodating the joint therein.
7. The conventional sampling sub of claim 6,
and a handle which is convenient to grab is arranged at one end of the protective cap, which is far away from the main body.
8. The conventional sampling sub of claim 1,
and grooves for accommodating corresponding parts on the valve seat are respectively arranged on the surfaces, contacted with the valve seat, of the mounting seats.
9. The conventional sampling sub of claim 1,
the outer surface of the valve seat is provided with connecting ports which are respectively communicated with the channels inside, sample outlets of two sample channels in the valve seat are respectively positioned at two axial ends of the valve seat and protrude out of the valve seat, the opening of the sample outlet faces the mounting seat, a switching pipe is inserted into the sample outlet, and the switching pipe behind the valve seat is respectively inserted into the corresponding sample channel inlet in the mounting seat.
10. The conventional sampling sub of claim 9,
the valve seat is fixed on the main base body through arc-shaped pressing covers clamped on the sample outlet respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020973160.5U CN212479101U (en) | 2020-06-01 | 2020-06-01 | A conventional sample nipple joint for oil instrument in pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020973160.5U CN212479101U (en) | 2020-06-01 | 2020-06-01 | A conventional sample nipple joint for oil instrument in pit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212479101U true CN212479101U (en) | 2021-02-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020973160.5U Active CN212479101U (en) | 2020-06-01 | 2020-06-01 | A conventional sample nipple joint for oil instrument in pit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212479101U (en) |
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2020
- 2020-06-01 CN CN202020973160.5U patent/CN212479101U/en active Active
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Effective date of registration: 20221102 Address after: No. 151, Fuji Village, Huangzhuang Town, Sanhe City, Langfang City, Hebei Province 065204 Patentee after: Zhang Yang Address before: 102488 no.18-d2213, Jianshe Road, Kaixuan street, Fangshan District, Beijing Patentee before: BEIJING BOJIAN TRANSMISSION TECHNOLOGY Co.,Ltd. Patentee before: Li Xiuwen |