CN216043627U - Washable well oil pipe plug - Google Patents
Washable well oil pipe plug Download PDFInfo
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- CN216043627U CN216043627U CN202122102005.3U CN202122102005U CN216043627U CN 216043627 U CN216043627 U CN 216043627U CN 202122102005 U CN202122102005 U CN 202122102005U CN 216043627 U CN216043627 U CN 216043627U
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Abstract
The utility model discloses a washable well oil pipe plug which comprises a leather cup and a ball seat, wherein the leather cup is sleeved on the ball seat and forms a leather cup and ball seat assembly together with the ball seat; the leather cup comprises an inner metal framework and a rubber vulcanized layer vulcanized outside the metal framework; the metal framework comprises a base body and a claw-shaped framework, the claw-shaped framework is connected to the upper opening edge of the base body, and the base body and the claw-shaped framework are of an integrated structure. The leather cup and ball seat structure can meet the functions of sealing an oil pipe, reducing the diameter of a penetrating pipe column and backwashing; the blanking plug is provided with a backwashing well channel and is provided with an anti-blocking throwing and fishing design.
Description
Technical Field
The utility model relates to the technical field of downhole tools for well completion construction of offshore oilfield water injection wells, in particular to a washable well oil pipe plug.
Background
In the layered water injection process, the leakage of a bottom check valve is caused due to the influence of factors such as impurities, corrosion and scaling, so that the separate injection of the integral pipe column is invalid. Through statistics, in the failure wells of the offshore single-pipe layered water injection well, the number of bottom valve leakage wells accounts for more than 1/3 of the total failure separate injection wells, and the influence on the offshore long-life layered water injection is very large. Because no proper treatment means exists, the current well can only be solved by a mode of re-operating the movable pipe column. The utility model provides a washable well plugging tool in an oil pipe, which can be directly thrown in from a wellhead, is pushed downwards in a tubular column through hydraulic boosting without other equipment, and can pass through a necking part of the tubular column and be pushed to a bottom valve position. The well washing valve can seal the leakage bottom valve and meet the requirement of backwashing, so that the service life of the pipe column is further prolonged, the operation workload is reduced, the operation cost is reduced, and the requirement of efficient development of offshore oil fields is met.
In the prior art, patent CN 202788734U discloses an underground tubing plug, which is a slip, a multi-stage cup and a rubber structure, and is used for plugging the tubing plug of the next-stage tubing when the tubing is lifted in the well. Patent CN 2672284Y discloses an oil pipe blanking plug for blowout prevention operation of an oil field water injection well, which consists of a multi-stage rubber plug and an anchor body and is delivered by a slurry pump. Patent CN 102116138A provides the oil pipe blanking plug technical field that the operation was used is pressed to profit gas well area, has leather cup and leather cup drive arrangement, makes toper release packing element and supplementary sealed packing element strut and block on oil pipe's inner wall through lifting force, plays the effect to oil pipe internal seal. The patent CN 201883992U discloses a downhole oil pipe plug, which has sealing and pressure-holding effects through a leather cup and a rubber sheet at the upper section, and two groups of slips are used for anchoring an oil pipe; patent CN 202360058U discloses a formula tubing plug that can drag for, is applied to the oil field and presses workover. The oil pipe internal passage can be sealed by the leather cup, the slips and the wax scraping head structure, so that the pressure of a well head is reduced, and pressurized construction operation is carried out; patent CN 206376811U discloses an expansion type oil pipe plug, belonging to the field of oil field blowout prevention operation, wherein an expansion type rubber sleeve is sleeved and fixed on an upper center rod, expands when meeting water and is used for sealing the inner cavity of an oil pipe; patent CN 205189818U discloses a combined type oil pipe blanking plug, is applicable to the well operation construction work shutoff blowout prevention technical field who spouts the well and have the overflow. The leather cup type rubber cylinder and the compression type rubber cylinder structure can radially expand and plug the drift diameter in the pipe column under the pressure action of the shaft.
The aforesaid contrast patent discloses multiple oil pipe blanking plug all has the leather cup structure, nevertheless lies in with this application difference: the leather cup is made of vulcanized rubber outside the claw-shaped steel skeleton, and is unique in structural design, and the leather cup is made of rubber in the above patents.
Patent CN207583344U discloses a metal frame rubber cylinder, which includes: the rubber tube comprises a metal framework and a rubber tube body. The metal framework is formed by connecting a plurality of metal sheets and has an axial telescopic function. The compression and energy storage of the rubber cylinder and the release of the rubber cylinder by deblocking can be realized, and the rubber cylinder can be rapidly restored to the original state conveniently. The rubber cylinder structure and the metal framework structure are different from the utility model;
patent CN207701768U discloses a strenghthened type rubber leather cup, including leather cup body and copper skeleton, and leather cup and copper skeleton are concentric structure. The strength and the wear resistance of the leather cup are improved, but the copper framework of the utility model is different from the utility model.
In summary, the technical solutions of the above-disclosed technologies, the technical problems to be solved, and the advantageous effects thereof are all different from the present invention, and no technical inspiration exists in the above-disclosed technical documents for further technical features, technical problems to be solved, and advantageous effects thereof.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide a washable well oil pipe plug, the plug structure is formed by connecting a three-stage leather cup and a ball seat structure in series, the leather cup is made of vulcanized rubber outside a metal framework, and the metal framework comprises: the base body and the claw-shaped framework; the leather cup and ball seat structure can meet the functions of sealing an oil pipe, reducing the diameter of a penetrating pipe column and backwashing; the blanking plug is provided with a backwashing well channel and is provided with an anti-blocking throwing and fishing design.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a washable well oil pipe plug comprises a leather cup and a ball seat, wherein the leather cup is sleeved on the ball seat and forms a leather cup and ball seat assembly together with the ball seat;
the leather cup is composed of an inner metal framework and a rubber vulcanized layer vulcanized outside the metal framework;
the metal framework comprises a base body and a claw-shaped framework, the claw-shaped framework is connected to the upper opening edge of the base body, and the base body and the claw-shaped framework are of an integrated structure.
Furthermore, the number of the leather cup ball seat assemblies is at least 3, and the leather cup ball seat assemblies are sequentially connected in series through connecting sleeves. All the leather cup ball seat assemblies after being connected in series are divided into a leather cup ball seat assembly at the uppermost end, a leather cup ball seat assembly in the middle and a leather cup ball seat assembly at the lowermost end.
Furthermore, the leather cup ball seat assembly at the uppermost end is connected with the fishing head, and the leather cup ball seat assembly at the lowermost end is connected with the lower connector.
Furthermore, the base body is a hollow cylinder and is used for fixing the claw-shaped framework on a connecting sleeve of the leather cup ball seat assembly.
Furthermore, the leather cup is divided into a main body and a lip part from the shape, the part, wrapped with the metal framework, inside the leather cup is the main body, and the main body has the function of bearing and supporting; the part of the vulcanized rubber extending outwards along the claw-shaped framework is a lip, and the lip adopts a double-trapezoid structure to bear pressure in sections.
Further, its top of fishing head is solid conical body, the conical body below is the solid cylinder structure that the external diameter is less than the cone, and solid cylinder below is trapezoidal solid cone for the cross-section, and the cone below is interior hollow circular cylinder, and radial through-hole is opened to the hollow circular cylinder side, and the trompil lower part is the external screw thread.
Furthermore, the connecting sleeve and the ball seat compress the leather cup together and are provided with the anti-loosening nail.
Compared with the prior art, the utility model has the following beneficial effects:
the leather cup is made by the outer vulcanite of metal framework, metal framework includes: the claw-shaped framework comprises a base body and a claw-shaped framework, wherein the base body is a hollow cylinder and is used for fixing the claw-shaped framework on a connecting sleeve; the claw-shaped framework is used for bearing hydraulic pressure and has higher strength and elasticity; parameters such as the number of branches of the claw-shaped framework, the width of the branches, the thickness of roots, the length of the branches, the average interval of the branches and the like are parameters which can be optimally designed. And the rubber is vulcanized outside the claw-shaped framework to prepare the leather cup. The leather cup is divided into two parts from the appearance: a body and a lip. The part of the leather cup, which is wrapped with the metal framework, is a main body, and the main body has the function of bearing and supporting. The part of vulcanized rubber extending outwards along the claw-shaped framework is a lip, and the lip adopts a double-trapezoid structure to bear pressure in a segmented manner, so that the sealing pressure is improved.
When the plugging device is used, the plugging device is put into an oil pipe from a wellhead, the plugging device is pumped and pressed on the ground by a pump truck, liquid enters the interior of the plugging device from a side hole of a fishing head on the upper part of the plugging device to push various stages of stainless steel balls to be tightly pressed on a ball seat, multi-stage sealing in the plugging device is realized, and downward driving force is generated; on the other hand, the liquid pushes each level of leather cups to generate pushing force outside the blanking plug; the blanking plug moves downwards in the pipe column, when a reducing hole exists in the downhole tool, the leather cups deform, and the blanking plug is pushed downwards under hydraulic pushing by other non-deformed leather cups at different levels. After the blanking plug passes through the reducing position, the leather cup recovers deformation; and finally, the plug is pushed to the bottom of the well, so that the bottom of the well is sealed.
When the water injection well injects water normally, water injection pressure from top to bottom enters the inner part of the blanking plug from the opening at the fishing head side of the blanking plug to push all stages of stainless steel balls to press on the ball seats, so that the inner part of the blanking plug is sealed; the water injection pressure pushes the leather cup from the outside of the blanking plug, and the leather cup opens to realize the external pressure-bearing sealing effect of the blanking plug.
When a well is backwashed, the flushing fluid flows upwards from the bottom end of the oil pipe, the water injection pressure is from bottom to top, the flushing fluid enters the interior of the blanking plug from the center of the lower connector of the blanking plug upwards, all levels of stainless steel balls are pushed away, and the stainless steel balls move upwards and prop against the bottom end of the upper connecting sleeve; the bottom end of the connecting sleeve is provided with a side open groove to prevent the stainless steel ball from blocking the bottom of the connecting sleeve upwards; and the well washing liquid enters the upper-stage leather cup and ball seat structure from the grooving position at the bottom end side of each stage of connecting sleeve, and finally flows into the oil pipe upwards from the opening position at the side of the fishing head, so that the reverse well washing is realized.
Drawings
FIG. 1 is a schematic diagram of a washable well tubing plug according to the present invention;
FIG. 2 is an axial cross-sectional view of a metal skeleton;
FIG. 3 is a left side view of the metal skeleton of FIG. 2;
fig. 4 is an axial cross-sectional view of the cup.
In the figure: the fishing head 1 and the lower joint 5;
2-1 parts of a first connecting sleeve, 3-1 parts of a second connecting sleeve and 4-1 parts of a third connecting sleeve; 2-2 parts of a first stainless steel ball, 3-2 parts of a second stainless steel ball and 4-2 parts of a third stainless steel ball; 2-3 of an O ring I, 3-3 of an O ring II and 4-3 of an O ring III; 2-4 parts of a first ball seat, 3-4 parts of a second ball seat and 4-4 parts of a third ball seat; 2-5 parts of a first leather cup, 3-5 parts of a second leather cup and 4-5 parts of a third leather cup; 3-0 parts of first anti-loose nails, 4-0 parts of second anti-loose nails and 5-0 parts of third anti-loose nails.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
referring to fig. 1 to 4, the present invention provides a technical solution:
a washable well oil pipe blanking plug comprises a fishing head 1; 3 leather cup and ball seat structures (a leather cup and ball seat structure I, a leather cup and ball seat structure II and a leather cup and ball seat structure III) are respectively arranged; the lower joint 5 is divided into three parts;
its top of fishing head 1 is solid taper type, the taper type below is the solid cylinder structure that the external diameter is less than the cone, and solid cylinder below is trapezoidal solid cone for the cross-section, and its below is interior hollow circular cylinder, and its side trompil, trompil lower part are the external screw thread.
The fishing head is connected with the leather cup and the ball seat structure I through external threads;
the leather cup and ball seat structure I comprises: five parts including a connecting sleeve I2-1, a stainless steel ball I2-2, an O-ring I2-3, a ball seat I2-4 and a leather cup I2-5; the upper end of the connecting sleeve I2-1 is connected with the upper connector 1 through internal threads; the lower end of the connecting sleeve I2-1 is connected with the ball seat I2-4 through internal threads; and the threaded connection part between the connecting sleeve I2-1 and the ball seat I2-4 is sealed by an O-shaped ring I2-3; the inner side of the upper end of the first ball seat 2-4 is a conical inclined plane, the radius of the upper part of the conical inclined plane is large, the radius of the lower part of the conical inclined plane is small, and the first stainless steel ball 2-2 is located on the conical inclined plane; the outer side of the lower end of the ball seat I2-4 is reduced, and a leather cup I2-5 is sleeved outside the reduced diameter sleeve; the outer side of the lower end of the first ball seat 2-4 is provided with an external thread; the external thread is connected with the next-stage leather cup and the ball seat 3 or the lower joint 5;
leather cup + ball seat structure two includes: the anti-loosening nail I is 3-0, the connecting sleeve II is 3-1, the stainless steel ball II is 3-2, the O-shaped ring II is 3-3, the ball seat II is 3-4, and the leather cup II is 3-5; and a second connecting sleeve 3-1 of the leather cup and ball seat structure II is connected with an external thread on a first ball seat 2-4 of the leather cup and ball seat structure I through an internal thread. The threaded connection part is screwed by a first anti-loosening nail 3-0 to fix a first leather cup 2-5; the lower end ball seat II 3-4 of the leather cup and ball seat structure II is connected with the upper end connecting sleeve III 4-1 of the next leather cup and ball seat structure III through external threads;
leather cup + ball seat structure three includes: the anti-loosening nail II is 4-0, the connecting sleeve III is 4-1, the stainless steel ball III is 4-2, the O-shaped ring III is 4-3, the ball seat III is 4-4, and the leather cup III is 4-5; a connecting sleeve III 4-1 at the upper end of the leather cup and ball seat structure III is in threaded connection with a ball seat II 3-4; the lower end ball seat III 4-4 of the leather cup and ball seat structure III is connected with the lower joint 5 through threads;
the length of the leather cup and ball seat structure is selected and the number of the connecting sleeves is selected: when the blanking plug passes through the reducing position in the pipe column, the leather cups deform, and one or more other leather cups in the whole blanking plug are ensured not to deform, so that the hydraulic pushing function is realized.
The lower joint 5 is of a hollow structure, the upper end of the lower joint is connected with a ball seat III 4-4 of the first-stage leather cup and ball seat structure III, and the upper-stage leather cup III 4-5 is tightly pressed; the outer side of the tool is of a conical structure, the lower end of the tool is small, and the upper end of the tool is the same as the outer diameter of the tool metal.
The leather cup is a core component and is shown as 4. The leather cup is made of vulcanized rubber outside a metal framework, and the metal framework is shown in figure 2 and comprises: the device comprises a base body 6 and a claw-shaped framework 7, wherein the base body 6 is a hollow cylinder and is used for fixing the claw-shaped framework 7 on a connecting sleeve; the claw-shaped framework 7 is used for bearing hydraulic pressure and has higher strength and elasticity; parameters such as the number of branches, the width of the branches, the thickness of the roots, the length of the branches, the average interval of the branches and the like of the claw-shaped framework 7 are parameters which can be optimally designed. And the rubber is vulcanized outside the claw-shaped framework to prepare the leather cup. The leather cup is divided into two parts from the appearance as shown in figure 4: a body 9 and a lip 8. The part of the metal framework wrapped inside the leather cup is a main body 9, and the main body 9 has the function of pressure bearing support. The part of vulcanized rubber extending outwards along the claw-shaped framework is a lip 8, and the lip adopts a double-trapezoid structure to bear pressure in a segmented manner and improve sealing pressure.
When the plugging device is used, the plugging device is put into an oil pipe from a wellhead, the plugging device is pumped and pressed on the ground by a pump truck, liquid enters the interior of the plugging device from a side opening of a fishing head 1 at the upper part of the plugging device to push various levels of stainless steel balls to be tightly pressed on respective ball seats, multi-stage sealing in the plugging device is realized, and downward driving force is generated; on the other hand, the liquid pushes each level of leather cups to generate pushing force outside the blanking plug; the blanking plug moves downwards in the pipe column, when a reducing hole exists in the downhole tool, the leather cups deform, and the blanking plug is pushed downwards under hydraulic pushing by other non-deformed leather cups at different levels. After the blanking plug passes through the reducing position, the leather cup recovers deformation; and finally, the plug is pushed to the bottom of the well, so that the bottom of the well is sealed.
When the water injection well injects water normally, water injection pressure from top to bottom enters the inner part of the blanking plug from the opening at the fishing head side of the blanking plug to push all stages of stainless steel balls to press on the ball seats, so that the inner part of the blanking plug is sealed; the water injection pressure pushes the leather cup from the outside of the blanking plug, and the leather cup opens to realize the external pressure-bearing sealing effect of the blanking plug.
When a well is backwashed, the flushing fluid flows upwards from the bottom end of the oil pipe, the water injection pressure is from bottom to top, the flushing fluid enters the interior of the blanking plug from the center of the lower connector 5 of the blanking plug upwards, all levels of stainless steel balls are pushed upwards, and the stainless steel balls move upwards and prop against the bottom end of the ball seat at the upper level; the bottom end of the ball seat is provided with a side open groove to prevent the stainless steel ball from blocking the bottom of the ball seat upwards; and the well washing liquid enters the upper-stage leather cup and ball seat structure from the open groove at the bottom end side of each stage of ball seat, and finally flows into the oil pipe upwards from the open hole at the side of the fishing head, so that the reverse well washing is realized.
During fishing, a fishing tool is put into the oil pipe, is connected with a fishing head of the blanking plug and is lifted out of the well through mechanical force.
Example 2:
referring to fig. 1 to 4, the present invention provides a technical solution:
a leather cup is made of vulcanized rubber outside a metal framework, and the metal framework is shown in figure 2 and comprises: the device comprises a base body 6 and a claw-shaped framework 7, wherein the base body 6 is a hollow cylinder and is used for fixing the claw-shaped framework 7 on a connecting sleeve; the claw-shaped framework 7 is used for bearing hydraulic pressure and has higher strength and elasticity; parameters such as the number of branches, the width of the branches, the thickness of the roots, the length of the branches, the average interval of the branches and the like of the claw-shaped framework 7 are parameters which can be optimally designed. And the rubber is vulcanized outside the claw-shaped framework to prepare the leather cup. The leather cup is divided into two parts from the appearance as shown in figure 4: a body 9 and a lip 8. The part of the metal framework wrapped inside the leather cup is a main body 9, and the main body 9 has the function of pressure bearing support. The part of vulcanized rubber extending outwards along the claw-shaped framework is a lip 8, and the lip adopts a double-trapezoid structure to bear pressure in a segmented manner and improve sealing pressure.
All parts and parts which are not discussed in the present application and the connection mode of all parts and parts in the present application belong to the known technology in the technical field, and are not described again. Such as welding, threaded connections, etc.
In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A washable well oil pipe plug comprises a leather cup and a ball seat, wherein the leather cup is sleeved on the ball seat and forms a leather cup and ball seat assembly together with the ball seat;
the leather cup is characterized by comprising an inner metal framework and a rubber vulcanized layer vulcanized outside the metal framework;
the metal framework comprises a base body and a claw-shaped framework, the claw-shaped framework is connected to the upper opening edge of the base body, and the base body and the claw-shaped framework are of an integrated structure.
2. The washable well tubing plug of claim 1, wherein the cup ball seat assemblies are arranged in at least 3 groups and are connected in series sequentially by connecting sleeves; all the leather cup ball seat assemblies after being connected in series are divided into a leather cup ball seat assembly at the uppermost end, a leather cup ball seat assembly in the middle and a leather cup ball seat assembly at the lowermost end.
3. The washable well tubing plug of claim 2, wherein the uppermost cup ball seat assembly is connected to the fishing head and the lowermost cup ball seat assembly is connected to the lower coupling.
4. The washable well tubing plug of claim 1, 2, or 3, wherein said base is a hollow cylinder for securing said claw-shaped cage to said sleeve of said cup-and-socket assembly.
5. The washable well tubing plug of claim 4, wherein the cup is divided into a main body and a lip part from the shape, the part of the cup, which wraps the metal framework, is the main body, and the main body has the function of pressure bearing and supporting; the part of the vulcanized rubber extending outwards along the claw-shaped framework is a lip, and the lip adopts a double-trapezoid structure to bear pressure in sections.
6. The washable well tubing plug of claim 3, wherein the fishing head has a solid conical body at its top, a solid cylindrical structure with an outer diameter smaller than that of the cone is arranged below the conical body, a solid cone with a trapezoidal cross section is arranged below the solid cylindrical body, an inner hollow cylinder is arranged below the cone, a radial through hole is arranged on the side surface of the hollow cylinder, and an external thread is arranged below the hole.
7. The washable well tubing plug of claim 5, wherein said coupling sleeve and ball seat together compress the cup and are fitted with a locking pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122102005.3U CN216043627U (en) | 2021-09-01 | 2021-09-01 | Washable well oil pipe plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122102005.3U CN216043627U (en) | 2021-09-01 | 2021-09-01 | Washable well oil pipe plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216043627U true CN216043627U (en) | 2022-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122102005.3U Active CN216043627U (en) | 2021-09-01 | 2021-09-01 | Washable well oil pipe plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216043627U (en) |
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2021
- 2021-09-01 CN CN202122102005.3U patent/CN216043627U/en active Active
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