CN215804437U

CN215804437U - Dredging and salvaging tool for high-wax-deposition well

Info

Publication number: CN215804437U
Application number: CN202122464858.1U
Authority: CN
Inventors: 杨莲; 张向阳; 黄耀; 付江徽; 雷佳; 巩佳语
Original assignee: China Petroleum and Chemical Corp; Sinopec Jiangsu Oilfield Co
Current assignee: China Petroleum and Chemical Corp; Sinopec Jiangsu Oilfield Co
Priority date: 2021-10-13
Filing date: 2021-10-13
Publication date: 2022-02-11
Anticipated expiration: 2031-10-13

Abstract

The utility model relates to a dredging and salvaging tool for a high wax deposition well, which comprises well mouth supports fixed on two sides of a well mouth, wherein a steel wire rope winding drum is arranged between the two well mouth supports, the centers of two ends of the steel wire rope winding drum are respectively connected with mandrels, the mandrels are respectively supported on the corresponding well mouth supports through bearings, one mandrel extends out of the well mouth supports and is connected with an output shaft of a speed reducer through a coupler, an input shaft of the speed reducer is driven by an explosion-proof motor, a steel wire rope is wound on the steel wire rope winding drum, the free end of the steel wire rope extends towards the underground and is suspended with an upper joint, a weighting rod is suspended below the upper joint, a spear rod is suspended at the lower end of the weighting rod, barbs with upward tips are uniformly welded on the circumference of the lower part of the spear rod, and a well drilling spear with a downward tip is arranged at the lower end of the spear rod. The circumference of the drift shaft spear is embedded with a heating belt, and the heating belt is powered by a storage battery arranged in the inner cavity of the drift shaft spear. The tool can smoothly break the wax layer and smoothly fish the swabbing rubber out, thereby improving the oil fishing efficiency.

Description

Dredging and salvaging tool for high-wax-deposition well

Technical Field

The utility model relates to a dredging and fishing tool for a high wax deposition well, 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. When the oil pumping well adopts a pumping tool with rubber to pump oil, the rubber often falls off, and the fallen rubber needs to be cleaned.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem that the paraffin precipitation layer influences the oil fishing efficiency in the prior art, and provides a dredging and fishing tool for a high-paraffin-precipitation well, which can smoothly break through the paraffin precipitation layer on the top, smoothly fish out a pumping rubber sheet and improve the oil fishing efficiency.

In order to solve the technical problems, the dredging and salvaging tool for the high wax deposition well comprises well mouth supports fixed on two sides of a well mouth, a steel wire rope winding drum is arranged between the two well mouth supports, the centers of two ends of the steel wire rope winding drum are respectively connected with a mandrel, the mandrels are respectively supported on corresponding wellhead supports through bearings, one mandrel extends out of the wellhead support and is connected with an output shaft of the speed reducer through a coupling, the input shaft of the speed reducer is driven by an explosion-proof motor, a steel wire rope is wound on the steel wire rope winding drum, the free end of the steel wire rope extends towards the underground and is suspended with an upper joint, a weighting rod is suspended below the upper joint, a lance is hung at the lower end of the weighting rod, barbs with upward tips are uniformly welded on the circumference of the lower portion of the lance, and a drift spear with a downward tip is arranged at the lower end head of the lance.

As an improvement of the utility model, a heating belt is embedded on the circumference of the drift shaft spear and is powered by a storage battery arranged in the inner cavity of the drift shaft spear.

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, a rubber overshot is welded on the circumference of the middle part of the lowest weighting rod, the opening of the rubber overshot is downward, a hollowed oil passing hole is arranged at the top of the rubber overshot, and fishing barbs with tips pointing to the axis of the spear rod in an inclined upward manner are uniformly distributed on the circumference of the inner wall of the rubber overshot.

As a further improvement of the utility model, the fishing barbs are distributed on two to four layers on the inner wall of the rubber overshot.

As a further improvement of the utility model, the periphery of the rubber overshot is attached to the inner wall of the shaft, and the lower port of the rubber overshot is provided with a wedge-shaped cut which inclines downwards and outwards.

As a further improvement of the present invention, a jar device is disposed between the weight bar and the lance, the jar device includes a jar hammer sleeved on a central slide rod, a hollow cylinder is disposed at a lower portion of the jar hammer, a top of the lance rod is connected to a bottom center of the hollow cylinder, a lower end of the central slide rod is inserted into an inner cavity of the hollow cylinder, an upper portion of the central slide rod is rotatably connected to a bottom center of the weight bar, and a suspension mechanism for suspending and releasing the jar hammer is disposed at an upper portion of the central slide rod.

As a further improvement of the utility model, the suspension mechanism comprises two hinge rods standing upwards, and the lower ends of the two hinge rods are symmetrically hinged on two sides of the boss of the central slide rod; the upper portion of the center hole of the jarring hammer is provided with an annular groove for the hinge rod to be embedded in, and the top of the annular groove is provided with a straight through groove for the hinge rod to slide out.

As a further improvement of the utility model, central slide bar support lugs are symmetrically arranged on two sides of the lower end of the central slide bar, and the top of the hollow cylinder is closed and is provided with a spiral groove for the central slide bar support lugs to be embedded and rotated.

As a further improvement of the utility model, the positions of the two sides of the central sliding rod corresponding to the hinge rods are respectively provided with a limit lug; an annular through groove communicated with the outside is arranged above the annular groove, and the two hinge rods in a closed state can smoothly pass through the inner diameter of the annular through groove.

As a further improvement of the utility model, the bottom of the boss of the central sliding rod is in a conical shape with a wide upper part and a narrow lower part, and a conical bottom hole matched with the bottom of the boss of the central sliding rod is arranged below the annular groove.

Compared with the prior art, the utility model has the following beneficial effects: the drift shaft spear can wear the wax deposition layer fast effectively, and the barb can carry out two-way breakage to the wax deposition layer, makes salvage convenient and fast more of oil, and the weighting piece can effectively improve broken tooth and drift shaft spear dynamics when wearing to break, makes wearing to break of wax deposition layer easier, improves and wears efficiency, practices thrift holistic salvage time. The fishing barbs can reliably fish out the pumping rubber falling into the well, 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 diagram illustrating an operating state of a first embodiment of the present invention;

FIG. 2 is a diagram illustrating a second embodiment of the present invention;

FIG. 3 is an enlarged view of the fishing tool in the second embodiment.

Fig. 4 is a top view of the jar hammer of fig. 3.

In the figure: 1. an explosion-proof motor; 2. a speed reducer; 3. a coupling; 4. a wellhead support; 5. a wire rope take-up reel; 6. a wire rope; 7. an upper joint; 8. a weight bar; 9. a rubber overshot; 9a, oil passing holes; 9b, fishing barbs; 9c, wedge-shaped incision; 10. a lance; 11. a central slide bar; 11a, a limiting bump; 11b, a central slide bar boss; 11c, a central slide bar lug; 12. a hinge lever; 13. a jarring hammer; an annular through slot; 13b, a straight through groove; 13c, an annular groove; 13d, a conical bottom hole; 14. a hollow cylinder; spiral grooves 14 a; 15. a barb; 16. a drifting spear; 17. and heating the belt.

Detailed Description

As shown in figure 1, the dredging and salvaging tool for the high wax deposition well comprises well mouth supports 4 fixed on two sides of a well mouth, a steel wire rope winding drum 5 is arranged between the two well mouth supports 4, the centers of two ends of the steel wire rope winding drum 5 are respectively connected with a mandrel, the mandrels are respectively supported on the corresponding well mouth supports 4 through bearings, one of them dabber stretches out and links to each other with the output shaft of speed reducer 2 through shaft coupling 3 from well head support 4, and the input shaft of speed reducer 2 is driven by explosion-proof motor 1, and it has wire rope 6 to coil on the wire rope winding drum 5, and wire rope 6's free end extends and has suspended upper joint 7 to the pit, and upper joint 7's below is suspended with weight bar 8, and spear 10 has been suspended in the lower extreme of weight bar 8, and evenly welded has the barb 15 that the tip is ascending on the lower part circumference of spear 10, and the lower tip of spear 10 is equipped with the downward drift spear 16 of tip.

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 explosion-proof machine 1 is started the next day, the explosion-proof machine 1 drives the steel wire rope winding drum 5 to rotate through the speed reducer 2 and the coupler 3, the steel wire rope winding drum 5 releases the steel wire rope 6 to enter a well, the steel wire rope 6 suspends the weighting rod 8 and the lance 10 downwards along the axis of the sleeve through the upper joint 7 in a hanging mode, when the wax layer is reached, the drifting spear 16 at the lower end of the lance 10 pierces the wax layer, a circular channel is pricked out on the wax layer under the action of gravity of the weighting rod 8, and the oil fishing in the next step is facilitated. When the lance 10 is lifted up, the barbs 15 on the lower circumference of the lance 10 reverse crush the paraffin layer, providing a deblocking effect.

For the wax deposition layer that is not only thick but also hard, it is not high only to rely on gravity crushing efficiency, as the implementation mode of further optimization, inlays on the circumference of drifting spear 16 and is equipped with heating band 17, and heating band 17 is by the battery power supply of placing in drifting spear 16 inner chamber in. The heating belt 17 is turned on at the wellhead and the drift spear 16 is then lowered into the well, when the drift spear 16 reaches the wax layer, the temperature of the drift spear 16 helps to melt the wax layer, facilitating the drift spear 16 to pierce through the thick wax layer.

The weight rods 8 may be connected in series by two or more than three rods to ensure sufficient penetration of the drift spear 16.

The middle circumference of the lowest part of the weighting rod 8 is welded with a rubber overshot 9, the rubber overshot 9 is downward opened, the top of the rubber overshot 9 is provided with a hollowed oil passing hole 9a, and the circumference of the inner wall of the rubber overshot 9 is uniformly distributed with fishing barbs 9b with tips pointing to the axis of the spear in an inclined upward direction. The inner wall of the rubber overshot 9 on which the fishing barbs 9b are distributed can be two to four layers.

The periphery of the rubber overshot 9 is attached to the inner wall of the shaft, and a wedge-shaped cut 9c which inclines downwards and outwards is arranged at the lower port of the rubber overshot 9.

After the wax layer is broken, can adopt the pumping instrument to drag for oil, drag for the oil in-process, the rubber of pumping instrument drops easily, cause the underground junk, rubber overshot 9 is down pasting the pit shaft this moment, wedge incision 9c of rubber overshot 9 lower extreme can carry out the scraping to the pit shaft inner wall, the wax layer that will glue at the pit shaft inner wall is shoveled away, the oilhole 9a at top provides the oil passing channel, avoid forming and hold back, lift behind rubber overshot 9 reacing the junk below, rubber or other junk are caught by salvage barb 9b, thereby be taken out the well head.

As shown in fig. 2 to 4, a jar device is provided between the weight bar 8 and the lance 10, the jar device includes a jar hammer 13 sleeved on the central slide bar 11, a hollow cylinder 14 is provided at a lower portion of the jar hammer 13, a top portion of the lance 10 is connected to a bottom center of the hollow cylinder 14, a lower end of the central slide bar 11 is inserted into an inner cavity of the hollow cylinder 14, an upper portion of the central slide bar 11 is rotatably connected to a bottom center of the weight bar 8, and a suspension mechanism for suspending and releasing the jar hammer 13 is provided at an upper portion of the central slide bar 11.

The suspension mechanism comprises two hinge rods 12 standing upwards, and the lower ends of the two hinge rods 12 are symmetrically hinged on two sides of a boss 11b of the central sliding rod; an annular groove 13c for the hinge rod 12 to be embedded is formed in the upper portion of the center hole of the jar hammer 13, and a straight through groove 13b for the hinge rod 12 to slide out is formed in the top of the annular groove 13c.

The two sides of the lower end of the central slide bar 11 are symmetrically provided with central slide bar support lugs 11c, and the top of the hollow cylinder 14 is closed and provided with a spiral groove 14a for the central slide bar support lugs 11c to be embedded and rotated.

When the wax deposition layer is extremely thick, the wax deposition layer is broken only by gravity, the effect is poor, the impact of the vibration hammer 13 is increased to generate disturbance, and the breaking efficiency is favorably improved. When the drifting spear 16 reaches the wax layer and is propped by the wax layer, the lower end of the central slide rod 11 descends towards the deep cavity of the hollow cylinder 14, the two hinge rods 12 slide in from the annular through groove 13a, when the tops of the hinge rods 12 enter the annular groove 13c, the steel wire rope 6 is lifted up, the hinge rods 12 are clamped in the annular groove 13c to carry the vibration hammer 13, along with the continuous ascending of the central slide rod 11, the central slide rod support lug 11c at the lower end of the central slide rod 11 enters the spiral groove 14a at the upper part of the hollow cylinder 14, and moves upwards while rotating, at the same time, the vibration hammer 13 keeps static or rotates slowly under the damping action of oil stains on the well wall, when the two hinge rods 12 rotate to be aligned with the straight through groove 13b, the vibration hammer 13 slides down to impact the top of the hollow cylinder 14, and strong impact force is favorable for the drifting spear 16 to pierce the wax layer.

The two sides of the central sliding rod 11 are respectively provided with a limit lug 11a at the position corresponding to the hinge rod 12; an annular through groove 13a communicated with the outside is arranged above the annular groove 13c, and the two hinge rods 12 in a closed state can smoothly pass through the inner diameter of the annular through groove 13a. The limiting convex blocks 11a at the two sides of the central sliding rod 11 can enable the two hinge rods 12 to keep a certain opening angle, so that the two hinge rods 12 can be further opened to hang the shock hammer 13 after entering the annular groove 13c, and the two hinge rods 12 are prevented from being stuck to the central sliding rod 11 to cause hanging failure.

The bottom of the central slide rod boss 11b is conical with a wide top and a narrow bottom, and a conical bottom hole 13d matched with the bottom of the central slide rod boss 11b is arranged below the annular groove 13c. When the bottom of the boss 11b of the central sliding rod is embedded into the conical bottom hole 13d, the centering and symmetry are automatically realized, and the two hinge rods 12 can accurately act conveniently.

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

1. The utility model provides a frock is salvaged in mediation of high wax deposition well, is including being fixed in the well head support of well head both sides, its characterized in that: be equipped with the wire rope reel between two well head supports, the both ends center of wire rope reel is connected with the dabber respectively, the dabber supports on corresponding well head support through the bearing respectively, and one of them dabber stretches out and links to each other through the output shaft of shaft coupling and speed reducer in following the well head support, the input shaft of speed reducer is driven by explosion-proof machine, it has wire rope to coil on the wire rope reel, wire rope's free end extends and has suspended in midair the top connection to the pit, the below of top connection has suspended in midair the weight bar, the lower extreme of weight bar has suspended in midair the spear, evenly welded has sharp ascending barb in end on the lower part circumference of spear, the lower tip of spear is equipped with sharp decurrent drifting spear.

2. The dredging and fishing tool for the high wax deposition well according to claim 1, characterized in that: the circumference of the drift shaft spear is embedded with a heating belt, and the heating belt is powered by a storage battery arranged in the inner cavity of the drift shaft spear.

3. The dredging and fishing tool for the high wax deposition well 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 dredging and fishing tool for the high wax deposition well according to claim 3, characterized in that: the middle part circumference of the lower part of the weighting rod is welded with a rubber overshot, the opening of the rubber overshot is downward, the top of the rubber overshot is provided with a hollowed-out oil passing hole, and fishing barbs with tips pointing to the axis of the spear in the inclined upward direction are uniformly distributed on the circumference of the inner wall of the rubber overshot.

5. The dredging and fishing tool for the high wax deposition well according to claim 4, characterized in that: the inner wall of the rubber overshot on which the fishing barbs are arranged is distributed with two to four layers.

6. The dredging and fishing tool for the high wax deposition well according to claim 4, characterized in that: the periphery of the rubber overshot is attached to the inner wall of the shaft, and a wedge-shaped cut which inclines downwards and outwards is arranged at the lower port of the rubber overshot.

7. The dredging and fishing tool for the high wax deposition well according to claim 1, characterized in that: the shock device is arranged between the weighting rod and the lance and comprises a shock hammer sleeved on a central sliding rod, a hollow cylinder is arranged at the lower part of the shock hammer, the top of the lance is connected to the center of the bottom of the hollow cylinder, the lower end of the central sliding rod is inserted into an inner cavity of the hollow cylinder, the upper part of the central sliding rod is rotatably connected to the center of the bottom of the weighting rod, and a suspension mechanism for suspending and releasing the shock hammer is arranged at the upper part of the central sliding rod.

8. The dredging and fishing tool for the high wax deposition well according to claim 7, characterized in that: the suspension mechanism comprises two hinge rods which are erected upwards, and the lower ends of the two hinge rods are symmetrically hinged on two sides of a boss of the central sliding rod; the upper portion of the center hole of the jarring hammer is provided with an annular groove for the hinge rod to be embedded in, and the top of the annular groove is provided with a straight through groove for the hinge rod to slide out.

9. The dredging and fishing tool for the high wax deposition well according to claim 8, characterized in that: the hollow cylinder is characterized in that central slide bar support lugs are symmetrically arranged on two sides of the lower end of the central slide bar, and the top of the hollow cylinder is closed and provided with a spiral groove for the central slide bar support lugs to be embedded and rotate.

10. The dredging and fishing tool for the high wax deposition well according to claim 8, characterized in that: the positions of the two sides of the central sliding rod, which correspond to the hinge rod, are respectively provided with a limiting lug; an annular through groove communicated with the outside is arranged above the annular groove, and the two hinge rods in a closed state can smoothly pass through the inner diameter of the annular through groove.

11. The dredging and fishing tool for the high wax deposition well according to claim 8, characterized in that: the bottom of the central sliding rod boss is conical with a wide upper part and a narrow lower part, and a conical bottom hole matched with the bottom of the central sliding rod boss is arranged below the annular groove.