CN113758656A - Double-hollow rod capable of checking leakage and leakage checking method of double-hollow rod - Google Patents
Double-hollow rod capable of checking leakage and leakage checking method of double-hollow rod Download PDFInfo
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- CN113758656A CN113758656A CN202010494511.9A CN202010494511A CN113758656A CN 113758656 A CN113758656 A CN 113758656A CN 202010494511 A CN202010494511 A CN 202010494511A CN 113758656 A CN113758656 A CN 113758656A
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000000903 blocking effect Effects 0.000 claims abstract description 89
- 238000012360 testing method Methods 0.000 claims description 27
- 238000007689 inspection Methods 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 10
- 239000013013 elastic material Substances 0.000 description 9
- 101000793686 Homo sapiens Azurocidin Proteins 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
- G01M3/2815—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
Abstract
The invention discloses a double-hollow rod capable of detecting leakage and a leakage detecting method of the double-hollow rod, wherein the double-hollow rod capable of detecting leakage comprises an inner-layer hollow rod (1) and an outer-layer hollow rod (2) which are sleeved inside and outside, a plurality of annular pieces are arranged in the inner-layer hollow rod (1), and the annular pieces are arranged at intervals along the axial direction of the inner-layer hollow rod (1); when the blocking component (3) is put into the inner layer hollow rod (1), the blocking component (3) can block the inner through hole of the annular piece; when the blocking member (3) is subjected to a pressure greater than the maximum resistance of the annular member to the blocking member (3), the blocking member (3) is able to pass through said annular member; the maximum resistance of the plurality of annular members to the blocking member (3) increases in sequence along the axial direction of the inner layer hollow rod (1). The double-hollow rod capable of checking the leakage and the leakage checking method of the double-hollow rod can quickly find a leakage point on the spot, and provide guidance for further maintenance of the double-hollow rod.
Description
Technical Field
The invention relates to the field of oil exploitation equipment, in particular to a double-hollow rod capable of detecting leakage and a leakage detecting method of the double-hollow rod.
Background
The hollow rod hot water circulation is used as a wax-proof viscosity-reducing heat tracing lifting mode with low operation cost, and is widely applied to thick oil and high-condensation oil. However, after long-term operation, the inner pipe sealing ring works under a high-temperature condition for a long time or the inner pipe is corroded, and the like, the inner leakage phenomenon possibly exists, so that the normal application of the hollow rod hot water circulation technology is influenced, but no effective means is provided for finding the leakage point at present.
Disclosure of Invention
In order to find the leak source of the double hollow rod, the invention provides a leak testing method of the double hollow rod and the double hollow rod capable of testing the leak, and the leak testing method of the double hollow rod and the double hollow rod capable of testing the leak can quickly find the leak source on site and provide guidance for further maintenance of the double hollow rod.
The technical scheme adopted by the invention for solving the technical problems is as follows: a double-hollow rod capable of detecting leakage comprises an inner-layer hollow rod and an outer-layer hollow rod which are sleeved inside and outside, an annular cavity is formed between the inner-layer hollow rod and the outer-layer hollow rod, a plurality of annular pieces are arranged in the inner-layer hollow rod and are arranged at intervals along the axis direction of the inner-layer hollow rod, and the outer side of each annular piece is fixedly connected with the inner surface of the inner-layer hollow rod in a sealing manner; when the blocking component is put into the inner hollow rod, the blocking component can block the inner through hole of the annular piece; the blocking member is capable of passing through the annular member when the blocking member is subjected to a pressure greater than the maximum resistance of the annular member to the blocking member; the maximum resistance of the plurality of annular members to the blocking member increases in sequence along the axis of the inner hollow rod.
The axis of the hollow rod of the inner layer coincides with the axis of the hollow rod of the outer layer, and the distance between two adjacent annular pieces is equal along the axis direction of the hollow rod of the inner layer.
The annular parts are made of rubber or plastics, the size and the shape of each annular part are the same, and the hardness of the annular parts is sequentially increased along the axial direction of the inner-layer hollow rod.
The inner diameters of the plurality of annular members decrease in sequence along the axial direction of the inner layer hollow rod.
The thickness of the annular piece gradually increases along the diameter of the inner hollow rod and in the direction away from the axis of the inner hollow rod.
The hollow pole of inlayer is upright state, the section of loop forming element contains last side, lower side and the outside limit that connects gradually, goes up the side and is the camber with lower side.
The blocking component comprises a shell and an inner ball, the shell comprises an upper through hole, a lower through hole and an inner cavity, the inner ball is located in the inner cavity, and the diameter of the inner ball is larger than the aperture of the upper through hole and the aperture of the lower through hole.
The shell contains casing and upper end cover down, and lower casing is tubular structure, and the lower part of casing is the toper down, goes up the through-hole and is located the center of upper end cover, and lower through-hole is located the lower extreme of casing down, and lower casing and upper end cover threaded connection.
The blocking member is capable of mating connection with the annular member.
The leakage testing method of the double hollow rod capable of testing leakage comprises the following steps:
The invention has the beneficial effects that: the double-hollow rod capable of checking the leakage and the leakage checking method of the double-hollow rod can quickly find the position of a leakage point on the spot, and provide guidance for further maintenance of the double-hollow rod.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
Figure 1 is a schematic view of a double hollow bar capable of leak testing according to the present invention in an operating condition.
Figure 2 is a schematic view of a double hollow bar capable of leak testing according to the present invention in a leak testing state.
Fig. 3 is a schematic cross-sectional view of a ring.
Fig. 4 is a schematic view of a plugging member.
FIG. 5 is a flow chart of a method of leak testing a double hollow pole of the present invention.
1. An inner hollow rod; 2. an outer hollow rod; 3. a blocking member; 4. 1 st ring member; 5. a 2 nd ring member; 6. a 3 rd ring member; 7. a 4 th ring member; 8. a 5 th ring member; 9. a tail pipe; 10. a solid sucker rod;
11. an upper side edge; 12. a lower side edge; 13. an outer side edge;
31. a housing; 32. an inner ball; 33. an upper through hole; 34. a lower through hole; 35. an inner cavity; 36. a lower housing; 37. and (4) an upper end cover.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
A double-hollow rod capable of detecting leakage comprises an inner-layer hollow rod 1 and an outer-layer hollow rod 2 which are sleeved inside and outside, wherein an annular cavity is formed between the inner-layer hollow rod 1 and the outer-layer hollow rod 2, a plurality of annular pieces are arranged in the inner-layer hollow rod 1 and are arranged at intervals along the axial direction of the inner-layer hollow rod 1, and the outer side of each annular piece is fixedly connected with the inner surface of the inner-layer hollow rod 1 in a sealing manner; when the blocking component 3 is put into the inner layer hollow rod 1, the blocking component 3 can block the inner through hole of the annular piece; when the blocking member 3 is subjected to a pressure greater than the maximum resistance of the annular member to the blocking member 3, the blocking member 3 can pass through said annular member; the maximum resistance of the plurality of annular members to the plugging member 3 increases in sequence in the axial direction of the inner layer hollow rod 1, as shown in fig. 1 and 2.
The invention is characterized in that the plurality of annular parts are added to the existing inner-layer hollow rod 1. When the closing member 3 is inserted into the inner hollow rod 1, the closing member 3 may be subjected to a pressure P by injecting a pressurized gas or liquid into the inner hollow rod 1. Initially, the pressure P applied to the closing member 3 is opposite to the resistance f of the annular member to the closing member 3, and the closing member 3 abuts against the annular member, so that the closing member 3 cannot pass through the annular member. As the pressure P to which the blocking member 3 is subjected continues to increase, the resistance F of the annular member to the blocking member 3 will also continue to increase, allowing the blocking member 3 to pass through the annular member when the blocking member 3 is subjected to a pressure P greater than the maximum resistance F of the annular member to the blocking member 3.
Normally, the double hollow rod capable of leak detection is in an upright state when in use, that is, the inner hollow rod 1 and the outer hollow rod 2 are both in an upright state, the maximum resistance of the annular member to the blocking member 3 is F, and the maximum resistance F of the plurality of annular members to the blocking member 3 increases in sequence from the top to the bottom. For example, 5 ring members are provided in the inner hollow rod 1, and the 5 ring members are, in order from top to bottom, a 1 st ring member 4, a 2 nd ring member 5, a 3 rd ring member 6, a 4 th ring member 7, and a 5 th ring member 8. The maximum resistance of the 1 st annular element 4 to the obturating member 3 is F1The maximum resistance of the 2 nd annular element 5 to the obturating member 3 is F2The maximum resistance of the 3 rd annular element 6 to the blocking element 3 is F3The maximum resistance of the 4 th annular element 7 to the obturating member 3 is F4The 5 th annular element 8 has a maximum resistance F to the obturating member 35，F1﹤F2﹤F3﹤F4﹤F5。
In this embodiment, the axis of the inner hollow rod 1 coincides with the axis of the outer hollow rod 2, and the distance between two adjacent annular members is equal along the axis of the inner hollow rod 1, and the annular members may be made of an elastic material or a rigid material. When the annular member is made of an elastic material, the blocking member 3 may be made of an elastic material or a rigid material. When the annular member is made of a rigid material, the blocking member 3 is preferably made of an elastic material. The elastic material and the rigid material are both existing materials.
Preferably, the ring members (e.g., the 1 st ring member 4, the 2 nd ring member 5, the 3 rd ring member 6, the 4 th ring member 7 and the 5 th ring member 8) are made of an existing elastic material, the elastic material may be rubber or plastic, each ring member has the same size and shape, the axis of each ring member coincides with the axis of the inner layer hollow rod 1, and the material hardness of the ring members is sequentially increased in the top-down direction, so that the maximum resistance of the ring members to the blocking member 3 is sequentially increased.
Or, the annular members are made of an existing elastic material, the material of each annular member is the same, and the elastic material can be rubber or plastic. The inner diameter of each annular member is the same, the axis of each annular member coincides with the axis of the inner-layer hollow rod 1, and the inner diameters of the annular members are sequentially reduced along the direction from top to bottom, so that the maximum resistance of the annular members to the blocking member 3 can be sequentially increased.
In this embodiment, each of the ring members has the same size and shape, and the hardness of the material of the plurality of ring members increases in the upward-downward direction. The thickness of the annular member gradually increases in a direction along the diameter of the inner hollow rod 1 and away from the axis of the inner hollow rod 1. The cross section of the ring-shaped member comprises an upper side 11, a lower side 12 and an outer side 13 which are connected in sequence, wherein the upper side 11 and the lower side 12 are both arc-shaped, as shown in fig. 3.
In this embodiment, the material of the blocking member 3 is a rigid material, such as a metal material, and the blocking member 3 may have a spherical shape, a cylindrical shape, a conical shape, or a combination thereof. Preferably, the plug member 3 comprises a housing 31 and an inner ball 32, the housing 31 comprises an upper through hole 33, a lower through hole 34 and an inner cavity 35, the inner ball 32 is located in the inner cavity 35, and the diameter of the inner ball 32 is larger than the diameter of the upper through hole 33 and the diameter of the lower through hole 34, as shown in fig. 4.
In this embodiment, the outer diameter of the outer shell 31 is 75% to 85% of the inner diameter of the inner hollow rod 1, the outer shell 31 comprises a lower shell 36 and an upper end cap 37, the lower shell 36 is of a cylindrical structure, the lower part of the lower shell 36 is tapered, the upper through hole 33 is located in the center of the upper end cap 37, the lower through hole 34 is located at the lower end of the lower shell 36, and the lower shell 36 is in threaded connection with the upper end cap 37. The lower end of the plug member 3 can be matingly connected to the ring member.
This hollow double-core pole that can test leaks is adding man-hour, a plurality of ring segments are prefabricated to the internal surface of the hollow core rod 1 of the inlayer of this hollow double-core pole, a plurality of ring segments can select to bond with the connected mode of the hollow core rod 1 of inlayer, select suitable degree of depth department to be connected with ordinary hollow double-core pole respectively when down. The lower end of the double hollow rod is connected with a tail pipe 9 and a solid sucker rod 10 in turn, as shown in fig. 2. The maximum resistance of the plurality of annular elements to the obturating member 3 can be obtained by pre-design and a limited number of experiments.
The following introduces a leak testing method of the double hollow rod capable of testing the leak, and the leak testing method comprises the following steps:
because this can test hollow pole of leaking is upright state, and the entry end of the hollow pole of inlayer 1 is the upper end of the hollow pole of this inlayer 1, and the effect shutoff of jam part 3 relies on gravity the interior through-hole of the 1 st annular member 4 in a plurality of annular members, this 1 st annular member 4 is from the 1 st of arranging downwards in a plurality of annular members.
and 4, increasing pressure from the inlet end of the inner-layer hollow rod 1 into the inner-layer hollow rod 1 and building the pressure, namely pressurizing by the high-pressure pump to enable the blocking component 3 to pass through the Nth annular piece, then enabling the blocking component 3 to be abutted against the (N + 1) th annular piece, and enabling the blocking component 3 to be subjected to (the high-pressure pump generates) N +1 th pressure PN+1And resistance f of the (N + 1) th annular element to the obturating member 3N+1，PN+1＝fN+1The N +1 th pressure PN+1Maximum resistance F of the (N + 1) th annular element to the obturating member 3N+1The N +1 th pressure PN+1Greater than the maximum resistance F of the nth annular element to the obturating member 3NN is the operation frequency of the step 4;
In particular, the method comprises the following steps of,
step 6 (i.e. step 4 repeated for the 1 st time), increasing the pressure from the inlet end of the inner layer hollow rod 1 to the inner layer hollow rod 1 and suppressing the pressure, i.e. pressurizing by the high-pressure pump to make the blocking component 3 pass through the 2 nd annular piece, then making the blocking component 3 abut against the 3 rd annular piece 5 to make the blocking component 3 receive the 3 rd pressure P generated by the high-pressure pump to the blocking component 33And the resistance f generated by the 3 rd ring element 6 to it3，P3＝f3Said 3 rd pressure P3Less than or equal to the maximum resistance F of the 3 rd annular element 6 to the obturating member 33Said 3 rd pressure P3Greater than the maximum resistance F of the 2 nd annular element 5 to the obturating member 32 Step 4, operation 2, wherein N is 2;
and 7 (namely step 5 of the 1 st repetition), detecting whether a pressure drop exists between the inlet end of the inner-layer hollow rod 1 and the blocking component 3, finding that the pressure drop exists, indicating that a leak source is positioned between the 2 nd annular component and the 2 nd annular component, and finishing the test.
The double-hollow rod capable of checking the leakage and the leakage checking method of the double-hollow rod can quickly find the position of a leakage point on the spot, and provide guidance for further maintenance of the double-hollow rod.
The above description is only exemplary of the invention and should not be taken as limiting the scope of the invention, so that the invention is intended to cover all modifications and equivalents of the embodiments described herein. In addition, the technical features and the technical schemes, and the technical schemes can be freely combined and used.
Claims (10)
1. The double-hollow rod capable of detecting the leakage is characterized by comprising an inner-layer hollow rod (1) and an outer-layer hollow rod (2) which are sleeved with each other, an annular cavity is formed between the inner-layer hollow rod (1) and the outer-layer hollow rod (2), a plurality of annular pieces are arranged in the inner-layer hollow rod (1) at intervals along the axial direction of the inner-layer hollow rod (1), and the outer side of each annular piece is fixedly connected with the inner surface of the inner-layer hollow rod (1) in a sealing manner;
when the blocking component (3) is put into the inner layer hollow rod (1), the blocking component (3) can block the inner through hole of the annular piece; when the blocking member (3) is subjected to a pressure greater than the maximum resistance of the annular member to the blocking member (3), the blocking member (3) is able to pass through said annular member; the maximum resistance of the plurality of annular members to the blocking member (3) increases in sequence along the axial direction of the inner layer hollow rod (1).
2. Double hollow bar capable of leak testing according to claim 1, characterized in that the axis of the inner hollow bar (1) coincides with the axis of the outer hollow bar (2), the distance between two adjacent rings being equal along the axis of the inner hollow bar (1).
3. The double hollow bar capable of leak testing according to claim 1, wherein the annular members are made of rubber or plastic, each annular member has the same size and shape, and the hardness of the annular members increases in sequence along the axial direction of the inner hollow bar (1).
4. Double hollow bar capable of leak testing according to claim 1, characterized in that the inner diameter of the plurality of annular elements decreases in sequence along the axis of the inner hollow bar (1).
5. Double hollow bar capable of leak testing according to claim 1, characterized in that the thickness of the annular elements increases progressively along the diameter of the hollow bar (1) of the inner layer and away from the axis of the hollow bar (1) of the inner layer.
6. Double hollow bar capable of leak testing according to claim 1, characterized in that the inner hollow bar (1) is in an upright position, the section of said annular element comprises an upper side (11), a lower side (12) and an outer side (13) connected in sequence, both the upper side (11) and the lower side (12) being in the shape of an arc.
7. Double hollow bar capable of leak testing according to claim 1, characterized in that the blocking member (3) comprises a housing (31) and an inner ball (32), the housing (31) comprising an upper through hole (33), a lower through hole (34) and an inner cavity (35), the inner ball (32) being located in the inner cavity (35), the diameter of the inner ball (32) being greater than the diameter of the upper through hole (33) and the diameter of the lower through hole (34).
8. The double hollow bar capable of leak testing according to claim 7, wherein the housing (31) comprises a lower housing (36) and an upper end cap (37), the lower housing (36) is of a cylindrical structure, the lower part of the lower housing (36) is tapered, the upper through hole (33) is positioned in the center of the upper end cap (37), the lower through hole (34) is positioned at the lower end of the lower housing (36), and the lower housing (36) is in threaded connection with the upper end cap (37).
9. Double hollow bar capable of leak testing according to claim 1, characterized in that a plugging member (3) can be coupled with the annular element.
10. The method of leak testing a double hollow pole capable of leak testing of claim 1, wherein said method of leak testing comprises the steps of:
step 1, placing a blocking component (3) into the inner-layer hollow rod (1) from the inlet end of the inner-layer hollow rod (1), and enabling the blocking component (3) to block the 1 st annular piece (4) in the plurality of annular pieces;
step 2, pressing and suppressing the pressure from the inlet end of the inner-layer hollow rod (1) into the inner-layer hollow rod (1) to enable the blocking component (3) to be subjected to the 1 st pressure and the resistance of the 1 st annular piece (4) to the blocking component (3), wherein the 1 st pressure is smaller than or equal to the maximum resistance of the 1 st annular piece (4) to the blocking component (3);
step 3, detecting whether a pressure drop exists between the inlet end of the inner-layer hollow rod (1) and the blocking component (3), if so, indicating that a leakage point is positioned above the 1 st annular component (4), and finishing the inspection; if there is no pressure drop, proceed to the next step;
step 4, pressurizing and suppressing the pressure from the inlet end of the inner-layer hollow rod (1) to the inner-layer hollow rod (1), wherein the blocking component (3) penetrates through the Nth annular component, so that the blocking component (3) is subjected to the (N + 1) th pressure and the resistance of the (N + 1) th annular component to the blocking component (3), the (N + 1) th pressure is smaller than or equal to the maximum resistance of the (N + 1) th annular component to the blocking component (3), and N is the operation frequency of the step 4;
step 5, detecting whether a pressure drop exists between the inlet end of the inner-layer hollow rod (1) and the blocking component (3), if so, indicating that a leakage point is positioned between the Nth annular component and the (N + 1) th annular component, and finishing the detection; if there is no pressure drop, steps 4 and 5 are repeated in sequence.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010494511.9A CN113758656B (en) | 2020-06-03 | 2020-06-03 | Double-hollow rod capable of detecting leakage and leakage detecting method of double-hollow rod |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010494511.9A CN113758656B (en) | 2020-06-03 | 2020-06-03 | Double-hollow rod capable of detecting leakage and leakage detecting method of double-hollow rod |
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| CN113758656A true CN113758656A (en) | 2021-12-07 |
| CN113758656B CN113758656B (en) | 2024-01-30 |
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| CN113758656B (en) | 2024-01-30 |
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