Fishing cup
By designing a salvage cup with an increase in the volume of the salvage cup and installing magnet blocks, the problem of large outer diameters in oil and gas wells is difficult to salvage without magnetic or weak magnetic falling objects, and efficient salvage and wellbore dredging are achieved, avoiding tool damage and operation delays.
Patent Information
- Application Number
- CN202420817581.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-19
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-04-19
AI Technical Summary
During the drilling and completion of oil and gas wells, small non-magnetic or weak magnetic falls with larger outer diameters are difficult to be effectively picked up by the traditional salvage cup, which affects subsequent drilling work and wellbore diameter. Moreover, traditional grinding and milling methods are difficult to successfully deal with these falls, which can easily lead to tool damage and drilling.
A salvage cup is designed, which includes an upper joint and a salvage cup body. The volume of the salvage cup body is increased by an eccentric connection portion, so that large-sized steel balls and ribs can be salvaged. The salvage cup is equipped with a plurality of magnet blocks on the connection part to absorb non-magnetic or weak magnetic falls, and a drainage hole is opened at the bottom of the cup to facilitate the falls.
It improves the salvage success rate, can salvage large-sized falls in the well at one time, avoids grinding and milling treatment, shortens the operation cycle, and avoids risks such as damage to grinding and drilling.
Smart Images
Figure CN222576629U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oil drilling mechanical equipment, in particular to a salvage cup. Background Art
[0002] During the drilling of oil and gas wells, small objects with large outer diameters and non-magnetic or weakly magnetic properties such as rotary guide accessories (ribs, steel balls) and gears often fall to the bottom of the well, seriously affecting subsequent drilling work. In addition, during the completion and repair of wells, objects such as the teeth of hydraulic anchors, the teeth of packers, the steel balls thrown in testing operations, and the large outer diameter blocks produced by the operation are not only difficult to salvage and have a low success rate, but are also not easy to be milled, affecting the wellbore diameter, seriously restricting the implementation of a series of measures to restore wellbore production capacity. Since this type of fallen objects have a large outer diameter, irregular size, and most of them are non-magnetic or weakly magnetic, the gap between the traditional fishing cup and the wellbore is small, and the space between the cup and the core shaft is also limited. When salvaging, larger fish cannot be flushed up and returned into the fishing cup through the gap. Strong magnetic salvage has a very low probability of successful salvage because the magnetism of the fish is too weak and it is too heavy. If forced grinding is performed, the material of this type of fish is relatively hard, and the bottom is not fixed and will rotate synchronously with the grinding and milling tools, making it extremely difficult to grind successfully. It may also cause damage to the grinding and milling tools and drill jamming.
[0003] In view of this, the inventor has designed a salvage cup based on many years of production design experience in this field and related fields and after repeated experiments, in order to solve the problems existing in the prior art. Utility Model Content
[0004] The utility model aims to provide a salvage cup, which can effectively salvage fallen objects with a larger outer diameter and improve the success rate of salvage.
[0005] In order to achieve the above object, the utility model provides a salvage cup, wherein the salvage cup comprises:
[0006] The upper joint has a cylindrical upper joint body, and a part of the cylindrical wall of the upper joint body extends along the length direction of the upper joint body to form a connecting portion;
[0007] The salvage cup body is fixedly connected to the connection part and is located on the same side of the connection part as the upper joint body. There is a gap between the salvage cup body and the upper joint body, and the salvage cup body has a cup opening opened toward the upper joint body.
[0008] The salvage cup as described above, wherein a drainage hole is provided at the bottom of the salvage cup body.
[0009] In the salvage cup as described above, the end of the connecting portion protrudes from the bottom of the salvage cup body and is formed with a guide shoe.
[0010] The salvage cup as described above, wherein the upper joint body is closed at one end toward the salvage cup body and the other end of the upper joint body is open, a water hole is opened in the connecting portion, and the two ends of the water hole are opened at the inner wall of the upper joint body and the tip of the guide shoe respectively.
[0011] The salvage cup as described above, wherein the cup bottom of the salvage cup body is arranged obliquely to the axis of the upper joint body.
[0012] As described above, in the salvage cup, a plurality of magnet blocks are detachably mounted on the connection portion, and the plurality of magnet blocks are located between the upper joint body and the salvage cup body.
[0013] As described above, the salvage cup, wherein the connecting portion is provided with a plurality of mounting grooves, the plurality of magnet blocks are aligned with the plurality of mounting grooves, and the magnet blocks are detachably mounted in the mounting grooves.
[0014] The salvage cup as described above, wherein the upper joint body and the connecting portion are integrally formed.
[0015] The salvage cup as described above, wherein the outer wall of the salvage cup body is in a semicircular arc shape.
[0016] The salvage cup as described above, wherein the salvage cup body is welded to the connecting portion.
[0017] Compared with the prior art, the utility model has the following characteristics and advantages:
[0018] The salvage cup proposed by the utility model has an upper joint connected to the wellbore pipe string through a drill bit buckle, and the salvage cup body is connected to the upper joint through an eccentrically arranged connecting part, and the salvage cup body and the upper joint body are located on the same side of the connecting part, thereby increasing the size design range of the salvage cup body, so that the salvage cup body can have a larger volume; the enlarged salvage body can salvage large-sized steel balls, ribs and other fallen objects, so as to improve the salvage effect and salvage success rate of the salvage cup.
[0019] The salvage cup proposed by the utility model can salvage small fallen objects with a large outer diameter that are non-magnetic or weakly magnetic out of the well at one time, avoiding the need to achieve the purpose of unblocking the wellbore through grinding and milling, greatly shortening the operation cycle, and avoiding unpredictable risks such as damage to the grinding and milling tools and drill sticking, thereby avoiding huge property losses. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. Under the guidance of the present invention, those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances.
[0021] Figure 1 This is a schematic diagram of the structure of the salvage cup proposed by the utility model;
[0022] Figure 2 It is a side view of the salvage cup in the utility model.
[0023] Description of Reference Numerals
[0024] 100. Salvage cup; 10. Upper joint;
[0025] 11. Upper joint body; 12. Connecting part;
[0026] 13. Shoe guide; 14. Water eye;
[0027] 20. Salvage cup; 30. Magnet block. DETAILED DESCRIPTION
[0028] The details of the present invention can be more clearly understood by combining the accompanying drawings with the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only used for the purpose of explaining the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be considered to belong to the scope of the present invention.
[0029] Unless otherwise specified, the directions of up, down, left, and right mentioned in this document are all based on the directions shown in this utility model. Figure 1 The up, down, left and right directions in the figure shall prevail and are explained here.
[0030] like Figure 1 , Figure 2 As shown, the utility model proposes a salvage cup 100, which includes an upper joint 10 and a salvage cup body 20. The upper joint 10 has a cylindrical upper joint body 11, and part of the cylindrical wall of the upper joint body 11 extends along the length direction of the upper joint body 11 to form a connecting portion 12; the salvage cup body 20 is fixedly connected to the connecting portion 12, and there is a gap between the salvage cup body 20 and the upper joint body 11, and the salvage cup body 20 has a cup mouth opened toward the upper joint body 11.
[0031] The salvage cup 100 proposed in the utility model has an upper joint 10 connected to the wellbore pipe string through a drill bit buckle, and a salvage cup body 20 is connected to the upper joint 10 through an eccentrically arranged connecting portion 12, and the salvage cup body 20 and the upper joint body 11 are located on the same side of the connecting portion 12, thereby increasing the size design range of the salvage cup body 20, so that the salvage cup body 20 can have a larger volume; the enlarged salvage cup body 20 can salvage large-sized steel balls, ribs and other fallen objects, so as to improve the salvage effect and salvage success rate of the salvage cup 100.
[0032] The salvage cup 100 proposed in the utility model can salvage small fallen objects with a large outer diameter that are non-magnetic or weakly magnetic out of the well at one time, avoiding the need to dredge the wellbore through grinding and milling, greatly shortening the operation cycle, and avoiding unpredictable risks such as damage to grinding and milling tools and drill sticking, thereby avoiding huge property losses.
[0033] In an optional embodiment of the present invention, the size of the salvage cup 20 (the outer diameter, inner diameter and depth of the salvage cup 20) is adjusted according to the size of the fish. When adjusting the size of the salvage cup 20, it is necessary to ensure that the fish can pass upward from the gap between the salvage cup 20 and the wellbore, and to ensure that the inner cavity of the salvage cup 20 is large enough for the fish to enter.
[0034] In an optional embodiment of the present invention, a drainage hole is provided at the bottom of the salvage cup 20. The drainage hole acts as a fluid channel, so that the fish can fall into the bottom of the cup in time after the liquid flows out, reducing the possibility of the fish running out.
[0035] In an optional embodiment of the present invention, the end of the connecting portion 12 protrudes from the bottom of the salvage cup body 20 and forms a guide shoe 13. The guide shoe 13 has a guiding function to ensure that the salvage cup 100 can be smoothly lowered into the well.
[0036] In an optional example of this embodiment, one end of the upper joint body 11 facing the salvage cup body 20 is closed, and the other end of the upper joint body 11 is open, and a water hole 14 is opened in the connection part 12, and the water hole 14 is opened along the length direction of the connection part 12, and the two ends of the water hole 14 are opened at the inner wall of the upper joint body 11 and the tip of the guide shoe 13 respectively. That is, the water hole 14 is opened inside the eccentrically arranged connection part 12 and penetrates the connection part 12. During the salvage operation, the well washing fluid flows out from the tip of the guide shoe 13 to play a jet role, which is used to flush the fallen objects at the bottom of the well, and further improve the salvage efficiency.
[0037] In an optional embodiment of the present invention, the bottom of the salvage cup 20 is arranged to be inclined with respect to the axis of the upper joint body 11 to facilitate the outflow of liquid.
[0038] In an optional embodiment of the present invention, a plurality of magnet blocks 30 are detachably mounted on the connecting portion 12, and the plurality of magnet blocks 30 are located between the upper joint body 11 and the salvage cup body 20. The magnet blocks 30 have an adsorption effect on the magnetic fish in the well, which can effectively improve the success rate of salvaging the fish in the well.
[0039] In an optional example of this embodiment, a plurality of mounting grooves are provided on the connecting portion 12, and a plurality of magnet blocks 30 are aligned with the plurality of mounting grooves, and the magnet blocks 30 can be detachably installed in the mounting grooves. Before entering the well, the number of magnet blocks 30 can be loaded according to the magnetic strength of the fish, thereby playing an auxiliary role in adsorbing the weakly magnetic fish after being washed up by the water flow, and the fish is adsorbed to the side and falls into the salvage cup body 20 under the influence of gravity.
[0040] In an optional embodiment of the present invention, the upper joint body 11 and the connecting portion 12 of the upper joint 10 are integrally formed.
[0041] Furthermore, the salvage cup 20 is welded to the connecting portion 12 .
[0042] In an optional embodiment of the present invention, the salvage cup body 20 is in a semicircular arc shape, and after the salvage cup body 20 is welded to the connecting portion 12, a swallow's nest-like structure is formed.
[0043] Now, in conjunction with an embodiment, the specific working process of the salvage cup 100 provided by the present utility model is described in detail.
[0044] Example 1
[0045] In this embodiment, before entering the well, the relevant dimensions of the salvage cup 20 are designed according to the size of the fallen objects in the well and the size of the casing to ensure that the fallen objects can smoothly enter the salvage cup 20. At the same time, according to the limitations of pump pressure, displacement, etc., the size of the water hole at the front end of the salvage cup is adjusted to facilitate better flushing of the fallen objects during salvage. The front end of the salvage cup is processed into a guide shoe shape (alloy teeth can also be appropriately welded) to facilitate rotary salvage and improve the success rate.
[0046] Check the magnetic properties of the magnet block 30, clean up the debris in the gap, verify whether there are any cracks in the welding parts of the salvage cup body 20, whether the welds are firm, confirm that the water holes are unobstructed, and the threads of the joints on the salvage cup are intact.
[0047] Tighten all drilling tools according to the standard tightening torque, connect the salvage cup 100 to the bottom of the wellbore pipe, and enter the well after the tools are connected. Pay attention to the wellhead protection against falling objects. According to the depth of the fish top, calculate the square margin in advance and whether to prepare short drill rods to facilitate later salvage activities, and ensure that the square rod has sufficient range and space for activities. When drilling to 2-3m above the top of the fish top, start the pump to test the pump pressure and displacement. During operation, according to the working capacity of the on-site equipment, increase the displacement as much as possible to better flush the fallen objects and facilitate salvage.
[0048] Lower the pipe string and add pressure of 0.5-1 ton. Turn on the rotary table at 30-40r / min to change the position of the fallen fish. The fallen fish can be flushed up and put into the cup by rotation. Turn on the pump and rotate for about 5 minutes. Stop the pump and the rotary table for 5 minutes (adjust the time according to the displacement size) and wait for the fallen fish to fall down into the cup. Repeat the salvage operation 3 times before pulling out the drill. During the pulling out of the drill, the driller is required to operate smoothly. It is strictly forbidden to stop the drill or brake suddenly to prevent the fallen fish from being poured out of the cup due to inertia, resulting in salvage failure.
[0049] Example 2
[0050] In this embodiment, during the drilling process of the oil well, the torque increases, the top drive loses rotation and the pump pressure decreases. After the torque decreases, the top drive resumes its rotation speed. At the same time, the rotary guide personnel find that the downhole rotary guide equipment is disconnected. After grinding the drill pressure for 7 minutes, the drill tool is lifted up by 5m, the pump is stopped and kept still for 10 minutes, and then the drill tool is lowered to continue drilling. The torque is quite different from the previous drilling torque, and the rotary guide is in a disconnected state. The drill is pulled out to check the disconnection of the rotary guide. At the same time, a piece of the rotary guide rib falls off, and the fish tail has a split shape. It is analyzed that there may be a broken rotary guide residue in the well. After the accident, the rib and the rotary guide residue are first considered to be salvaged out of the well, so as to provide conditions for the salvage of the broken rotary guide and the drill bit, facilitate fishing, and reduce the operation risk. Considering the size of the rib and the non-magnetic condition of the rotary guide residue, the salvage cup 100 proposed by the utility model is used. The split rotary guide residue is salvaged in the first trip, and then the rib is salvaged in the second trip, and the obstacles on the top of the fish are successfully cleared, creating conditions for the successful salvage of the broken rotary guide and the drill bit.
[0051] Example 3
[0052] In this embodiment, when the oil well is pulling out the pipe string with a seal (7" PHP packer) in the original well, it is found that two pieces of the packer teeth have fallen off, the bottom ball seat is damaged, and the steel ball has also fallen to the bottom of the well. The well has a serious sand burial in the open hole section at the bottom of the well, and the production capacity has dropped seriously. It is necessary to clean the sand burial at the bottom of the well and then perform acidizing operation to restore the production capacity. However, the fallen packer teeth and steel balls rotate with the milling tool during the drilling, grinding and sand flushing operation, which seriously affects the sand flushing footage. At the same time, the steel balls support the water eye of the pipe string, which restricts the flushing effect and easily causes sand settling and drilling. Therefore, it is necessary to fish out the steel balls and packer teeth before the sand flushing operation. Considering the size and weight of the steel balls and teeth, traditional fishing cups and strong magnetic tools can no longer achieve fishing. Therefore, the fishing cup 100 proposed by the utility model is used to successfully fish out the packer teeth and steel balls from the well, laying a foundation for subsequent sand flushing operations, shortening the operation cycle, and reducing the operation risk.
[0053] The salvage cup 100 proposed by the utility model has a simple structure, significant use effect, and the operation success rate reaches the expected effect; it can efficiently salvage small fallen objects with a large outer diameter that are non-magnetic or weakly magnetic, which provides great convenience for the implementation of subsequent measures such as underground wellbore dredging and complex processing, shortens the operation cycle, and avoids the risk of further deterioration of underground accidents.
[0054] The detailed explanation of the above-mentioned embodiments is only intended to explain the present invention so as to facilitate a better understanding of the present invention. However, these descriptions cannot be interpreted as limitations on the present invention for any reason. In particular, the various features described in different embodiments may also be arbitrarily combined with each other to form other embodiments. Unless there is a clear description to the contrary, these features should be understood to be applicable to any embodiment and are not limited to the described embodiments.
Claims
1. A salvage cup, characterized in that: The salvage cup comprises: The upper joint has a cylindrical upper joint body, and a part of the cylindrical wall of the upper joint body extends along the length direction of the upper joint body to form a connecting portion; The salvage cup body is fixedly connected to the connection part and is located on the same side of the connection part as the upper joint body. There is a gap between the salvage cup body and the upper joint body, and the salvage cup body has a cup opening opened toward the upper joint body.
2. The salvage cup according to claim 1, characterized in that: The bottom of the salvage cup body is provided with a drainage hole.
3. The salvage cup according to claim 1, characterized in that: The end of the connecting portion protrudes from the bottom of the salvage cup body and is formed with a guide shoe.
4. The salvage cup according to claim 3, characterized in that: The upper joint body is closed at one end facing the salvage cup body and is open at the other end. A water hole is provided in the connecting portion, and the two ends of the water hole are respectively opened at the inner wall of the upper joint body and the tip of the guide shoe.
5. The salvage cup according to any one of claims 1 to 4, characterized in that: The cup bottom of the salvage cup body is arranged to be inclined with respect to the axis of the upper joint body.
6. The salvage cup according to claim 1, characterized in that: A plurality of magnet blocks are detachably mounted on the connecting portion, and the plurality of magnet blocks are located between the upper joint body and the salvage cup body.
7. The salvage cup according to claim 6, characterized in that: The connecting portion is provided with a plurality of mounting grooves, the plurality of magnet blocks are aligned with the plurality of mounting grooves, and the magnet blocks are detachably mounted in the mounting grooves.
8. The salvage cup according to claim 1, characterized in that: The upper joint body and the connecting portion are integrally formed.
9. The salvage cup according to claim 1, characterized in that: The outer wall of the salvage cup body is in a semicircular arc shape.
10. The salvage cup according to claim 1, characterized in that: The salvage cup body is welded to the connecting portion.