CN217001721U - Oil-water well wellhead casing short-circuit dismounting device - Google Patents
Oil-water well wellhead casing short-circuit dismounting device Download PDFInfo
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- CN217001721U CN217001721U CN202220109406.3U CN202220109406U CN217001721U CN 217001721 U CN217001721 U CN 217001721U CN 202220109406 U CN202220109406 U CN 202220109406U CN 217001721 U CN217001721 U CN 217001721U
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Abstract
The utility model discloses a short circuit dismounting device for a casing of an oil-water well wellhead, which comprises a speed reducer; the speed reducer is provided with an input shaft and an output shaft, wherein the input shaft is used for connecting the hydraulic screwing machine, and the output shaft is used for connecting a casing short circuit; the outer wall of the reducer shell is provided with a fixing ring capable of preventing the reducer shell from rotating. The utility model can conveniently, quickly and safely disassemble the wellhead casing short-circuit lower flange from the wellhead casing coupling, reduce the labor intensity of workers and improve the mechanical construction degree. The current situation of manual operation of the existing oil-water well wellhead casing pipe short-circuit device for disassembly is improved, the effect of applying mechanical operation is achieved, labor intensity is reduced, and potential safety hazards are eliminated.
Description
Technical Field
The utility model relates to the field of oil-water well wellhead maintenance equipment in oil fields, in particular to a wellhead short-circuit dismounting device for an oil-water well casing.
Background
The lower flange on the oil-water well wellhead device is connected with the casing short circuit on the underground well barrel, and oil production wellhead equipment of different models needs to be frequently replaced according to operation construction requirements, for example: different models of construction wellhead equipment need to be changed in fracturing construction, thermal recovery gas injection and the like, and corresponding casing short circuits need to be changed for adjusting wellhead heights. When changing the oil recovery well head equipment of different models, need to dismantle the wellhead assembly from the sleeve pipe short circuit, that is to say dismantle the lower flange of wellhead assembly lower part from the sleeve pipe short circuit. The lower flange of the lower part of the wellhead device is connected with the casing short joint in a threaded manner, and the lower flange of the lower part of the wellhead device needs to be rotated to disassemble the wellhead device. The existing method for dismounting the lower flange is to insert an oil pipe into a hoop hole on a large cross joint and push the oil pipe manually to rotate so as to dismount the lower flange from a casing short joint. The connecting thread of the lower flange and the casing short joint is rusted in the field under the action of long-time water and gas, is not easy to loosen, sometimes needs to be baked by gas welding to enable the casing short joint to be loosened, sometimes needs to be cut to damage the casing short joint, and can be detached. The method has the problems of high labor intensity, low mechanization degree, easy occurrence of safety accidents and the like.
Publication (bulletin) No.: CN111395988B, publication (announcement) day: 2020-10-30 disclose an oil field is with dismantling wellhead assembly, relate to oil field workover equipment, including the well head mount pad, dismantle and carry and draw the piece, conversion actuating mechanism, installation shifter and well head, beneficial technological effect can realize quick installation and dismantlement, the installation shifter possesses gyro wheel and supports two kinds of modes, the installation and the dismantlement of well head are convenient for to the gyro wheel mode, support the mode and can play the effect of support to the well head, avoid the long time well head to receive external factor influence to take place skew or bending deformation's phenomenon. The well head mount pad is established on the well head, dismantles and carries a rotatable coupling in one side of well head mount pad, and conversion actuating mechanism is connected with the cooperation of dismantling to carry and draws, and conversion actuating mechanism establishes on the installation shifter, and the installation shifter is established and is used for supporting or sliding on the outer wall of well head, dismantles to carry and draws the piece and pass through to drive conversion actuating mechanism drive installation shifter and carry out the conversion.
Publication (bulletin) No.: CN109940556B, publication (public notice) day: 2019-08-30 discloses a wellhead casing pipe dismounting device, which comprises hydraulic casing pipe tongs, a pneumatic hammer, a dismounting tool and internal spare tongs, wherein the internal spare tongs comprise a vertical connecting plate, a transverse connecting plate, an upper pipe and a lower pipe, the upper pipe is fixedly welded with the transverse connecting plate, the upper pipe is connected with the lower pipe through splines, the splines between the upper pipe and the lower pipe are fixedly connected through hexagon socket head cap screws, an oil cylinder and a cone frustum are arranged inside the lower pipe, one end of the oil cylinder is fixedly connected with the upper pipe through a pin shaft, the other end of the oil cylinder is connected with the cone frustum through a cone frustum pin shaft, the lower pipe is also provided with upper wedge tongs and lower wedge tongs, the inner side surfaces of the upper wedge tongs and the lower wedge tongs are matched with the outer conical surface of the cone frustum, the lower pipe is provided with a slot for mounting the upper wedge tongs and the lower wedge tongs, the device saves manpower and material resources, improve work efficiency, well site sleeve pipe maintenance is dismantled and is used hydraulic pressure casing tongs.
Publication (bulletin) No.: CN110578482A, publication (public notice) day: 2019-12-17 discloses wellhead casing pipe dismounting equipment which structurally comprises a pressing clamp tank body and a mould cover, wherein the pressing clamp tank body is provided with a pipe sleeve, a male connector and a steel mould jaw, and the mould cover is provided with a pull ring and a hydraulic jack-up device, and the wellhead casing pipe dismounting equipment has the beneficial effects that: can change the pulling of pull ring into pushing down through the reverse action of pull ring, thereby promote springer and circulator drive claw pole and grab ground, the support that promotes the claw pole is on ground, thereby promote the circulator through reverse power and shift up, produced pressure atress is on the hydraulic pressure bag under the cooperation of circulator and screwed pipe simultaneously, reverse power through the hydraulic pressure bag promotes, the supplementary pressure pincers jar body that promotes is gone up and is pulled out, thereby it has pulled out to drive the oil well sleeve pipe, because the effect of pressure is greater than the effect of pulling force, simultaneously in addition the auxiliary action of hydraulic pressure pipe, can dismantle the oil well sleeve pipe easily, time saving and labor saving.
The technical solutions of the above-disclosed technologies, the technical problems to be solved, and the advantageous effects thereof are all different from those of 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 the oil-water well wellhead casing short-circuit dismounting device which can conveniently, quickly and safely dismount the casing short-circuit lower flange from the casing coupling, reduce the labor intensity of workers and improve the mechanical construction degree. The current situation of manual operation of the existing oil-water well wellhead casing pipe short-circuit device for disassembly is improved, the effect of applying mechanical operation is achieved, labor intensity is reduced, and potential safety hazards are eliminated.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the oil-water well wellhead casing short-circuit dismounting device comprises a speed reducer;
the speed reducer is provided with an input shaft and an output shaft, wherein the input shaft is used for connecting a hydraulic screwing machine, and the output shaft is used for connecting a sleeve short circuit;
the outer wall of the reducer shell is provided with a fixing ring capable of preventing the reducer shell from rotating.
Further, the input shaft is connected with a hydraulic screwing machine through a lifting short circuit.
Further, the lower end of the output shaft is connected with a connecting flange.
Furthermore, the lower end of the connecting flange is connected with a large cross.
Further, the lower end of the large four-way is connected with a lower flange.
Further, the lower end of the lower flange is connected with a short joint of the sleeve.
Furthermore, two circles of bolt through holes are formed in a flange plate of the connecting flange, an inner circle of bolt through holes are matched with a 250 wellhead device, and an outer circle of bolt through holes are matched with a 350 wellhead device.
Compared with the prior art, the utility model has the following beneficial effects:
the lifting short circuit is arranged on the input shaft, the hydraulic screwing machine can be used for rotating the lifting short circuit, so that the work of disassembling the lower flange of the oil-water well mouth device is changed from manual operation into mechanical operation, the labor intensity of workers can be greatly reduced, the potential safety hazard is eliminated, no safety accident occurs, the speed reducer is arranged, the output shaft and the torque are increased, the hydraulic screwing machine can be used for screwing the connecting thread of the lower flange of the oil-water well mouth device which can rotate only with large torque and the casing short circuit on an industrial site, therefore, the utility model also has the characteristic of applicability, and has remarkable economic benefit and social benefit.
Drawings
FIG. 1 is a schematic structural diagram of the oil-water well wellhead casing short-circuit dismounting device;
FIG. 2 is a schematic bottom view of a connecting flange of the oil-water well wellhead casing short-circuit dismounting device.
Reference numerals: the lifting short circuit comprises a lifting short circuit 1, a fixing ring 2, a speed reducer 3, a connecting flange 4, a large four-way joint 5, a lower flange 6 and a casing short circuit 7.
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:
as shown in fig. 1 to 2, the short-circuit dismounting device for casing at wellhead of oil-water well comprises a lifting short-circuit 1, a fixed ring 2, a speed reducer 3, a connecting flange 4, a large four-way joint 5, a lower flange 6 and a casing short-circuit 7, wherein the lower part of the lower flange 6 is in threaded connection (casing threads) with the upper part of the casing short-circuit 7, the lower flange of the large four-way joint 5 is in flange connection with the upper flange of the lower flange 6, the lower part of the connecting flange 4 is in flange connection with the upper flange of the large four-way joint 5, the upper part of the speed reducer 3 is provided with an input shaft 3-1, the lower part of the speed reducer 3 is provided with an output shaft 3-2, the output shaft 3-2 rotates simultaneously when the input shaft 3-1 rotates, the rotation speed of the output shaft 3-2 is lower than that of the input shaft 3-1, the output shaft 3-2 is coaxial with the input shaft 3-1, the speed reducer 3 is arranged on the connecting flange 4, the output shaft 3-2 is connected with the upper part of the connecting flange 4, so that the output shaft 3-2 can drive the connecting flange 4 to synchronously rotate when rotating, the fixing ring 2 is arranged on the shell of the speed reducer 3 and fixes the fixing ring 2, and when the input shaft 3-1 rotates, the shell of the speed reducer 3 does not rotate, so that the input shaft 3-1 and the shell of the speed reducer 3 can relatively rotate.
Two circles of bolt through holes are arranged on a flange plate at the lower part of the connecting flange 4, an inner circle of through holes 4-1 is matched with a 250 wellhead device, and an outer circle of through holes 4-2 is matched with a 350 wellhead device. The circle centers of the 4-12 inner circles passing through the hole 4-1 are connected on the same circle, and the circle center of the circle is on the axis of the large cross 5. The circle centers of the 4-12 outer rings passing through the holes 4-2 are connected on the same circle, and the circle center of the circle is on the axis of the big four-way joint 5. The connecting flange 4 can meet the matching of two wellhead devices.
The lifting short circuit 1 is arranged on the input shaft 3-1, the hydraulic screw fastener used on site is used for lifting the short circuit 1 in a rotating mode, after the torque is increased through the speed reducer 3, the torque is transmitted to the lower flange 6, and the connecting thread of the lower flange 6 and the casing short circuit 7 is loosened.
The hydraulic screwing machine for the oil pipe in the field repair operation is the hydraulic screwing machine used in the operation of the oil-water well, does not need to adjust the torque, and can facilitate the construction operation.
The connection thread of the lower flange 6 and the casing short joint 7 is screwed up by adopting the method, and the rotation direction of the hydraulic screwing machine is opposite to the rotation direction during disassembly.
The lifting short circuit is arranged on the input shaft, the hydraulic screwing machine can be used for rotating the lifting short circuit, so that the work of disassembling the lower flange of the oil-water well mouth device is changed from manual operation into mechanical operation, the labor intensity of workers can be greatly reduced, the potential safety hazard is eliminated, no safety accident occurs, the speed reducer is arranged, the output shaft and the torque are increased, the hydraulic screwing machine can be used for screwing the connecting thread of the lower flange of the oil-water well mouth device which can rotate only with large torque and the casing short circuit on an industrial site, therefore, the utility model also has the characteristic of applicability, and has remarkable economic benefit and social benefit.
Example 2:
referring to fig. 1 to 2, the present invention provides a technical solution:
the oil-water well wellhead casing short-circuit dismounting device comprises a speed reducer;
the speed reducer is provided with an input shaft and an output shaft, wherein the input shaft is used for connecting a hydraulic screwing machine, and the output shaft is used for connecting a sleeve short circuit;
the outer wall of the shell of the speed reducer is provided with a fixing ring capable of preventing the shell of the speed reducer from rotating.
Although fig. 1 to 2 are used in all the above embodiments, it is apparent to those skilled in the art that separate drawings are not provided for illustration as long as parts or structural features missing from the embodiments are removed from the drawings. As will be clear to the person skilled in the art. Of course, the embodiment with more components is only the best embodiment, and the embodiment with less components is the basic embodiment, but the basic object of the utility model can also be achieved, so all the modified embodiments are within the protection scope of the utility model.
All parts and components which are not discussed in the present application and the connection mode of all parts and components in the present application belong to the known technology in the technical field. The application is direct and will not be described in detail.
In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are used broadly and should be construed to include, for example, "connected" may be a fixed connection, a detachable 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 of the present specification, the description of "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 (6)
1. The oil-water well wellhead casing short-circuit dismounting device is characterized by comprising a speed reducer;
the speed reducer is provided with an input shaft and an output shaft, wherein the input shaft is used for connecting the hydraulic screwing machine, and the output shaft is used for connecting a casing short circuit;
the outer wall of the shell of the speed reducer is provided with a fixed ring capable of preventing the shell of the speed reducer from rotating;
the input shaft is connected with the hydraulic screwing machine through a lifting short circuit.
2. The oil-water well wellhead casing short-circuit dismounting device is characterized in that the lower end of the output shaft is connected with a connecting flange.
3. The short circuit dismounting device of oil-water well wellhead casing pipe is characterized in that the lower end of the connecting flange is connected with a large four-way joint.
4. The oil-water well wellhead casing short-circuit dismounting device is characterized in that the lower end of the large four-way joint is connected with a lower flange.
5. The oil-water well wellhead casing short-circuit dismounting device is characterized in that the lower end of the lower flange is connected with the casing short-circuit.
6. The oil-water well wellhead casing short-circuit dismounting device is characterized in that two circles of bolt through holes are formed in a flange plate of the connecting flange, an inner circle of the bolt through holes is matched with a 250 wellhead device, and an outer circle of the bolt through holes is matched with a 350 wellhead device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220109406.3U CN217001721U (en) | 2022-01-17 | 2022-01-17 | Oil-water well wellhead casing short-circuit dismounting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220109406.3U CN217001721U (en) | 2022-01-17 | 2022-01-17 | Oil-water well wellhead casing short-circuit dismounting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217001721U true CN217001721U (en) | 2022-07-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220109406.3U Active CN217001721U (en) | 2022-01-17 | 2022-01-17 | Oil-water well wellhead casing short-circuit dismounting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217001721U (en) |
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2022
- 2022-01-17 CN CN202220109406.3U patent/CN217001721U/en active Active
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