CN215804436U - Long well shut-in oil bailing plug removing device - Google Patents
Long well shut-in oil bailing plug removing device Download PDFInfo
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- CN215804436U CN215804436U CN202122464807.9U CN202122464807U CN215804436U CN 215804436 U CN215804436 U CN 215804436U CN 202122464807 U CN202122464807 U CN 202122464807U CN 215804436 U CN215804436 U CN 215804436U
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Abstract
The utility model relates to a long shut-in well oil fishing blockage removing device which comprises a spear rod descending along the axis of a casing, wherein the lower end of the spear rod is provided with a well dredging spear with a downward tip, spokes which are uniformly distributed in a radial shape are welded on the circumference of the spear rod, and the free ends of the spokes are respectively bent downwards to form crushing teeth with downward tips; the upper end of lance can rotationally be connected at the lower extreme of weighing rod, and the lower extreme at the top connection is rotationally connected on the upper portion of weighing rod, and the top center of top connection is connected with wire rope, and wire rope's upper end is convoluteed on the wire rope winding drum, and the both ends of wire rope winding drum are supported on the well head support through the bearing respectively, and the well head support is fixed respectively in the well head both sides, and the output that shaft coupling and motor reducer were passed through to the one end of wire rope winding drum is connected. This long well shut-in bailing oil unblocking device can puncture the top wax layer more easily, improves the efficiency of breaing, shortens holistic salvage time, practices thrift the cost of bailing oil.
Description
Technical Field
The utility model relates to a long shut-in well oil fishing blockage removing device, and belongs to the technical field of oil well fishing.
Background
Some low-yield and low-efficiency oil wells which are closed for a long time have certain oil fishing value due to the recovery of stratum energy. The well head is easy to overflow due to accumulated residual pressure, and safety accidents are easy to happen once well overflow occurs. For some oil wells with oil-dragging value, casing oil-dragging is usually adopted. The method takes measures to remove accumulated liquid in the oil well, not only can eliminate the potential safety hazard problem, but also can provide certain crude oil yield for the oil well.
However, in the actual oil bailing process on site, part of wells have a plugging section formed by wax deposition dead oil accumulated at the top of the liquid level in the casing, the wax deposition cementation degree is relatively serious, the depth is generally 50-1500 m, and if a conventional pumping means is adopted, a downhole tool cannot pass through the wax deposition plugging section, so that the oil bailing operation is stopped, and part of old wells, low-yield wells and low-efficiency wells cannot further dig the residual oil, so that the production problem in the oil extraction operation of an oil field is very troublesome.
The conventional blockage removal section needs a workover construction team to go into a well washing pipe column for circular well washing, the cost is high, the period is long, and the cost is 6-12 ten thousand yuan.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that the paraffin deposit layer influences the oil fishing efficiency in the prior art, and provides a long well-closing oil fishing blockage removing device which can more easily break the paraffin deposit layer on the top, improve the perforating efficiency, shorten the overall fishing time and save the oil fishing cost.
In order to solve the technical problem, the long shut-in well oil fishing blockage removing device comprises a spear rod descending along the axis of a casing, wherein the lower end of the spear rod is provided with a well dredging spear with a downward tip, spokes uniformly distributed in a radial shape are welded on the circumference of the spear rod, and the free ends of the spokes are respectively bent downwards to form crushing teeth with downward tips; the upper end of the lance rod is rotatably connected to the lower end of the weighting rod, the upper portion of the weighting rod is rotatably connected to the lower end of the upper connector, a steel wire rope is connected to the center of the top of the upper connector, the upper end of the steel wire rope is wound on a steel wire rope winding drum, two ends of the steel wire rope winding drum are respectively supported on wellhead supports through bearings, the wellhead supports are respectively fixed to two sides of a wellhead, and one end of the steel wire rope winding drum is connected with the output end of the motor reducer through a coupler.
As an improvement of the utility model, the crushing teeth are provided with two layers, three layers or four layers along the height direction of the lance, and the radius of the circumference where the upper layer of crushing teeth is located is sequentially larger than that of the circumference where the lower layer of crushing teeth is located.
As a further improvement of the utility model, the weighting rod is provided with two or more than three sequentially connected weighting rods.
As a further improvement of the utility model, the lance is provided with a section of hollow section, the upper and lower ends of the hollow cylinder are respectively connected with the solid section into a whole, the inner cavity of the hollow cylinder is provided with a baffle sleeve, the upper end of the baffle sleeve is provided with baffle sleeve lugs which symmetrically extend outwards, the baffle sleeve lugs respectively extend out from a vertical elongated slot of the hollow cylinder, the center of the bottom of the hollow cylinder is provided with a hinged support, the hinged support is symmetrically hinged with barb rods, the upper ends of the barb rods are abutted against the inner wall of the baffle sleeve, the middle upper parts of the barb rods are respectively hinged with a support rod, the upper ends of the support rods are symmetrically hinged with the bottom of a support ring, the support ring is sleeved on the central rod, and a spring is arranged between the upper end surface of the support ring and the top wall of the hollow cylinder.
As a further improvement of the utility model, the lower end of the central rod is fixed at the center of the hinged support, and the upper end of the central rod is fixed at the center of the top wall of the hollow cylinder.
As a further improvement of the utility model, two or three vertical long grooves are symmetrically arranged along the outer wall of the hollow cylinder, and the barb rods correspond to the vertical long grooves.
As a further improvement of the utility model, each of the spokes is welded to the outer periphery of the lower solid section of the lance.
As a further improvement of the present invention, the top of the lance is provided with a lance circular head with an enlarged diameter, the lance circular head is embedded in a central groove of the weight bar, a bottom flange of the lance circular head is supported on a weight bar gland, and the weight bar gland is fixed on the lower end face of the weight bar through screws.
Compared with the prior art, the utility model has the following beneficial effects: the paraffin formation layer can be quickly and effectively punctured, so that oil can be conveniently and quickly salvaged, the weighting block can effectively improve the force of the crushing teeth and the drifting spear during puncturing, the paraffin formation layer can be punctured more easily, the puncturing efficiency is improved, and the overall fishing time is saved; most tools can be made by self, and the investment is very low.
Drawings
The utility model will be described in further detail with reference to the following drawings and detailed description, which are provided for reference and illustration purposes only and are not intended to limit the utility model.
FIG. 1 is a schematic diagram of the operation of the first embodiment of the present invention;
FIG. 2 is a diagram illustrating a second embodiment of the utility model before the barbed rod is opened;
fig. 3 is a state diagram of the second barbed rod according to the embodiment of the present invention after being opened.
In the figure: 1. a motor reducer; 2. a coupling; 3. a wire rope take-up reel; 4. a wellhead support; 5. a wire rope; 6. an upper joint; 7. a weight bar; 7a, a weighting rod gland; 8. a lance; a lance circular head; 8b, a drifting spear; 9. a hollow cylinder; 9a, a vertical long groove; 10. spokes; 10a, crushing teeth; 11. a blocking sleeve; 11a, a spacer lug; 12. hinging seat; 13. a barb rod; 14. a support bar; 15. a support ring; 16. a center pole; 17. a spring.
Detailed Description
As shown in fig. 1, the long shut-in well oil dredging blockage removing device comprises a lance 8 descending along the axis of a casing, a well dredging lance 8b with a downward tip is arranged at the lower end of the lance 8, spokes 10 uniformly distributed in a radial shape are welded on the circumference of the lance 8, and the free ends of the spokes 10 are respectively bent downwards to form crushing teeth 10a with downward tips; the upper end of lance 8 rotationally connects the lower extreme at weight bar 7, and the lower extreme at top connection 6 is rotationally connected on the upper portion of weight bar 7, and the top center of top connection 6 is connected with wire rope 5, and wire rope 5's upper end is convoluteed on wire rope winding drum 3, and the both ends of wire rope winding drum 3 are supported on well head support 4 through the bearing respectively, and well head support 4 is fixed respectively in the well head both sides, and the one end of wire rope winding drum 3 is connected with motor reducer 1's output through shaft coupling 2.
The crushing teeth 10a are provided with two, three or four layers in the height direction of the lance 8, and the radius of the circumference where the upper layer of the crushing teeth 10a is located is sequentially larger than the radius of the circumference where the lower layer of the crushing teeth is located.
When the plugging removal operation is needed, 200L of paraffin remover and 200L of hot water are poured into the long shut-in well shaft one day in advance, and the top dead oil cementation is damaged through the paraffin remover and the hot water, so that the plugging removal device is convenient to damage the dead oil more easily. The next day motor reducer 1 is started, the output end of motor reducer 1 drives the steel wire rope winding drum 3 to rotate through coupler 2, steel wire rope 5 is released into the well, steel wire rope 5 suspends weighting rod 7 and lance 8 downwards along the axis of the sleeve through upper joint 6, when reaching the paraffin layer, lance lower end drift spear 8b firstly pierces the paraffin layer, then crushing tooth 10a pierces the paraffin layer, crushing tooth 10a is distributed on the circumference of the coaxial line of drift spear 8b, under the action of gravity of weighting rod 7, a circular channel is pricked on the paraffin layer, and oil fishing is convenient to be carried out on the next step.
More than two layers of crushing teeth 10a can be arranged as required, a circle of small oil through holes are firstly pricked on the wax layer under the crushing teeth 10a close to the lance 8, and then the crushing teeth 10a on the upper layer continue to prick larger oil through holes on the wax layer.
According to the thickness of the wax layer, the weighting rod 7 can be provided with two or more than three sequentially connected rods so as to ensure that the crushing teeth 10a and the drift spear 8b have enough penetrating power.
The top of the lance 8 is provided with a lance circular head 8a with an enlarged diameter, the lance circular head 8a is embedded in a central groove of the weight bar 7, a bottom flange of the lance circular head 8a is supported on a weight bar gland 7a, and the weight bar gland 7a is fixed on the lower end face of the weight bar 7 through screws. This ensures that the lance 8 is coaxial with the weight bar 7 and can rotate freely.
When the wax deposition layer is very thick, the blockage removal can be completed only by breaking the wax deposition layer for a plurality of times, and for the wax deposition layer with very strong cementation property, even if the wax deposition layer is pierced by the breaking teeth 10a, the breaking teeth are quickly adhered and caked, the channel is blocked again, and the wax deposition layer is pierced downwards only by the drift spear 8b and the breaking teeth 10a, so that the effect is poor. In the actual operation process, the lance is required to be lifted up frequently to crush the paraffin layer for multiple times, and if the paraffin layer can be crushed in the lifting process of the lance, bidirectional blockage removal is formed, and the crushing efficiency is greatly improved.
As shown in fig. 2, the lance is provided with a hollow section, the upper and lower ends of the hollow cylinder 9 are respectively connected with the solid section as a whole, and each spoke 10 is welded on the periphery of the lower solid section of the lance to improve the strength of the welding part. The inner cavity of the hollow cylinder 9 is provided with a baffle sleeve 11, the upper end of the baffle sleeve 11 is provided with baffle sleeve lugs 11a which symmetrically extend outwards, the baffle sleeve lugs 11a respectively extend out from a vertical elongated slot 9a of the hollow cylinder 9, the center of the bottom of the hollow cylinder 9 is provided with a hinged support 12, the hinged support 12 is symmetrically hinged with barbed rods 13, the upper end of the barbed rod 13 is abutted against the inner wall of the baffle sleeve 11, the middle upper part of the barbed rod 13 is hinged with a support rod 14, the upper end of the support rod 14 is symmetrically hinged at the bottom of a support ring 15, the support ring 15 is sleeved on a center rod 16, and a spring 17 is arranged between the upper end face of the support ring 15 and the top wall of the hollow cylinder 9.
The lower end of the central rod 16 is fixed at the center of the hinged support 12, and the upper end of the central rod 16 is fixed at the center of the top wall of the hollow cylinder 9.
Two or three vertical long grooves 9a are symmetrically arranged along the outer wall of the hollow cylinder 9, and the barb rods 13 correspond to the vertical long grooves 9a.
When the lance descends, the barb rod 13 is not required to function, and the free end of the barb rod 13 is restrained on the inner wall of the retaining sleeve 11 and is in a contracted state. During the downward movement of the lance, the retaining sleeve 11 is in the upper limit position by the upward force applied to the retaining sleeve lug 11a and the pressing tension of the barbed rod 13 generated by the tension of the spring 17.
When the lance is lifted up, if the wax deposition layer is still not broken, the retaining sleeve lug 11a descends along the vertical long groove 9a of the hollow cylinder 9 under the damping action of the wax deposition layer until the retaining sleeve lug slides to the bottom of the vertical long groove 9a, and the free end of the barb rod 13 is released; and under the action of the tension of the spring 17, the support ring 15 pushes the upper end of the support rod 14 to move downwards, the lower end of the support rod 14 drives the upper end of the barb rod 13 to open outwards, the upper end of the barb rod 13 extends out of the vertical long groove 9a of the hollow cylinder 9 to form an inverted umbrella shape pointing upwards, when the lance is lifted, the barb rods 13 destroy the paraffin layer from bottom to top, so that bidirectional crushing is formed, and the blockage removing effect is greatly improved.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention. In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention. Technical features of the present invention which are not described may be implemented by or using the prior art, and will not be described herein.
Claims (8)
1. The utility model provides a long well shut-in oil bailing unblock device, includes along the descending lance of casing axis, the lower extreme of lance is equipped with the downward drift spear of tip, its characterized in that: spokes are welded on the circumference of the lance and are uniformly distributed in a radial shape, and the free ends of the spokes are bent downwards respectively to form crushing teeth with downward tips; the upper end of the lance rod is rotatably connected to the lower end of the weighting rod, the upper portion of the weighting rod is rotatably connected to the lower end of the upper connector, a steel wire rope is connected to the center of the top of the upper connector, the upper end of the steel wire rope is wound on a steel wire rope winding drum, two ends of the steel wire rope winding drum are respectively supported on wellhead supports through bearings, the wellhead supports are respectively fixed to two sides of a wellhead, and one end of the steel wire rope winding drum is connected with the output end of the motor reducer through a coupler.
2. The long shut-in well oil-fishing blockage removing device according to claim 1, characterized in that: the crushing teeth are provided with two layers, three layers or four layers along the height direction of the lance, and the radius of the circumference where the upper layer of crushing teeth is located is sequentially larger than that of the circumference where the lower layer of crushing teeth is located.
3. The long shut-in well oil-fishing blockage removing device according to claim 1, characterized in that: the weighting rods are provided with two or more than three pieces which are connected in sequence.
4. The long shut-in well oil-fishing blockage removing device according to claim 1, characterized in that: the spear is provided with a section of hollow section, the upper end and the lower end of the hollow cylinder are respectively connected with the solid section into a whole, a blocking sleeve is arranged in the inner cavity of the hollow cylinder, blocking sleeve lugs which symmetrically extend outwards are arranged at the upper end of the blocking sleeve, the blocking sleeve lugs respectively extend out of a vertical long groove of the hollow cylinder, a hinged support is arranged at the center of the bottom of the hollow cylinder, barb rods are symmetrically hinged to the hinged support, the upper ends of the barb rods are abutted against the inner wall of the blocking sleeve, supporting rods are hinged to the middle upper portions of the barb rods respectively, the upper ends of the supporting rods are symmetrically hinged to the bottom of a supporting ring, the supporting ring is sleeved on a central rod, and a spring is arranged between the upper end face of the supporting ring and the top wall of the hollow cylinder.
5. The long shut-in well oil-fishing blockage removing device according to claim 4, characterized in that: the lower end of the central rod is fixed in the center of the hinged support, and the upper end of the central rod is fixed in the center of the top wall of the hollow cylinder.
6. The long shut-in well oil-fishing blockage removing device according to claim 4, characterized in that: two or three vertical elongated grooves are symmetrically arranged along the outer wall of the hollow cylinder, and the barb rods correspond to the vertical elongated grooves.
7. The long shut-in well oil-fishing blockage removing device according to claim 4, characterized in that: each spoke is welded on the periphery of the lower solid section of the lance.
8. The long shut-in well oil dredging blockage removing device according to any one of claims 1 to 7, characterized in that: the top of the lance is provided with a lance circular head with an enlarged diameter, the lance circular head is embedded in a central groove of the weighting rod, a bottom flange of the lance circular head is supported on a weighting rod gland, and the weighting rod gland is fixed on the lower end face of the weighting rod through screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122464807.9U CN215804436U (en) | 2021-10-13 | 2021-10-13 | Long well shut-in oil bailing plug removing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122464807.9U CN215804436U (en) | 2021-10-13 | 2021-10-13 | Long well shut-in oil bailing plug removing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215804436U true CN215804436U (en) | 2022-02-11 |
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ID=80170649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122464807.9U Active CN215804436U (en) | 2021-10-13 | 2021-10-13 | Long well shut-in oil bailing plug removing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215804436U (en) |
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2021
- 2021-10-13 CN CN202122464807.9U patent/CN215804436U/en active Active
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