A well fluid control and recovery device and operating method for drilling tools during overhaul.

Abstract

This invention discloses a control and recovery device and operating method for well fluid ejection during workover drilling. The device includes a vehicle body with a vertical support frame. A downward-pressing opening and closing device is mounted on the support frame. The opening and closing end of the device has a first barrel and a second barrel, which are joined together. A groove is formed at the bottom of the two barrels where they meet. This invention allows for free movement on the drilling rig working face, enabling workover operations at multiple wellheads with a single device. Operation is simple and quick, allowing for rapid entry and exit from the work area with high efficiency. It also allows for controlled recovery of well fluid overflowing during workover drilling, preventing surface pollution.

Description

Technical Field

[0001] This invention relates to the field of well fluid recovery technology, specifically to a well fluid control and recovery device and operating method for well workover drilling tools. Background Technology

[0002] Currently, during oilfield workover and salvage operations, common salvage tools such as sliding lugs and retrieval cones often experience blockages due to small water holes and the accumulation of large particles. This prevents the proper drainage of well fluid from the drill pipe. When the drill pipe is lifted to the rotary table and disassembled, the well fluid inside the drill string spills and splashes onto the drilling platform, making recovery difficult, causing environmental pollution, making the drilling platform slippery, and posing personal safety hazards. Furthermore, it significantly erodes the fluid column in the well, reducing fluid column pressure and creating a weak point in well control safety. Given the current stringent safety and environmental protection requirements, there is an urgent need to develop a device to control and recover the splashing of well fluid and prevent the spillage of wastewater and oil.

[0003] Publication (Announcement) No.: CN219034678U discloses a wellhead blowout and leakage prevention device for well workover operations, including an oil receiver and a connecting pipe. The bottom end of the connecting pipe is fixedly connected to the oil well, the oil receiver is fixed to the connecting pipe, and the top end of the connecting pipe is connected to the tubing. The oil receiver can collect oil leaking from the top end of the connecting pipe and the tubing when the tubing is pulled out. The connecting pipe is equipped with an oil return structure to allow the oil in the oil receiver to flow back into the oil well. This prior art uses a connecting pipe as a connector between the oil well and the tubing, and an oil receiver is installed on the connecting pipe so that when the tubing is pulled out, the oil flowing out from the top end of the connecting pipe and the tubing can be collected in the oil receiver, and then flowed back into the oil well through the oil return structure on the connecting pipe. This prevents environmental pollution and harm to the health of employees, and saves oil resources and the manpower and material costs of the oilfield.

[0004] The existing technology is not easy to move, has low efficiency, and cannot complete well repair operations at multiple wellheads.

[0005] Publication (Announcement) No.: CN219139006U discloses a split-type small-scale wellhead platform, in which the riser section and platform are separate and detachably connected; it also includes a pressure ring, an upper clamping mechanism, and a bottom positioning mechanism. A mounting hole is provided in the center of the platform, into which the riser section is inserted. The outer side of the bottom flange of the riser section is tapered, and the bottom of the platform mounting hole mates with it. A pressure ring is fixedly connected to the cylindrical surface of the riser section, and multiple upper clamping mechanisms are fixedly connected to the platform's surrounding surface around the mounting hole; the upper clamping mechanisms tighten and loosen the pressure ring after the bottom flange of the riser section is positioned with the platform. The upper clamping mechanism includes a handle, a fixing plate, and a pressure rod, with the pressure rod pressing the pressure ring in the opposite direction. This prior art, by operating the clamping handle and employing a split structure, greatly reduces the difficulty of connecting the riser section to the wellhead, making the connection more convenient, reducing labor intensity, and saving time.

[0006] The existing technology is mobile, but disassembly and assembly take a long time, it is inefficient, and it cannot complete well repair operations at multiple wellheads.

[0007] Publication (Announcement) No.: CN116081139A discloses a fixed wellhead hazardous waste liquid environmental protection collection device, comprising: an outer layer of sprayed polyurea elastomer; a middle layer of polyurethane polymer reinforcement layer, wherein the middle layer of polyurethane polymer reinforcement layer is disposed at the bottom of the outer layer of sprayed polyurea elastomer, the bottom of the middle layer of polyurethane polymer reinforcement layer is a base plate structure, the base plate structure is treated with seepage prevention and sealing treatment with the wellhead and process, the base plate structure is surrounded by a cofferdam structure, and a flexible folding connection structure is provided on the front of the folding connection between the cofferdam structure and the base plate structure. This prior art can completely realize the collection of hazardous waste liquid flowing out of the wellhead tree valve during maintenance without it touching the ground, ensuring that there is no hazardous waste liquid pollution within 3 meters on all four sides of the well site tree surface, achieving standardization and normalization of well site environmental protection; saving manpower, eliminating the need for repeated environmental protection of the tree and ground during well workover and logging operations and well site maintenance operations in oilfields, and eliminating the need for manpower and transportation equipment for collection and transfer.

[0008] The existing technology is immobile, inefficient, and unable to complete well repair operations at multiple wellheads.

[0009] In summary, the technical solutions, technical problems to be solved, and beneficial effects of the above-disclosed technologies are all different from those of the present invention. Regarding the more technical features, technical problems to be solved, and beneficial effects of the present invention, the above-disclosed technical documents do not provide any technical inspiration. Summary of the Invention

[0010] To address the aforementioned deficiencies in existing technologies, the purpose of this invention is to provide a well fluid control and recovery device and operating method for workover drill tools, which prevents sewage and oil spills during well workover and retrieval processes, and is mobile, enabling a single device to quickly perform multiple well workover operations.

[0011] To achieve the above objectives, the present invention adopts the following technical solution:

[0012] A well fluid control and recovery device for overhaul drilling tools includes a vehicle body with a vertical support on the vehicle body; a downward opening and closing device is provided on the support, and a first barrel and a second barrel are provided at the opening and closing end of the downward opening and closing device. The first barrel and the second barrel are joined together, and a groove is provided at the joint of the bottom of the two barrels.

[0013] The pressing opening and closing device includes a handle, a lifting column, a linkage mechanism, and a locking mechanism;

[0014] The lifting column is fitted onto the bracket. The lifting column is L-shaped. The handle is connected to one end of the bottom of the lifting column via a handle fixing shaft. The handle can swing back and forth around the handle fixing shaft.

[0015] The horizontal side L of the lifting column extends upward to form a fixing plate;

[0016] The handle fixing shaft is located at the lower part of the fixing plate, and a transverse lever rail guide groove is provided at the upper part of the fixing plate;

[0017] The handle has a longitudinal handle lever limiting hole above the handle fixing shaft.

[0018] The linkage mechanism is movably connected to the handle from above the handle's fixed shaft; the linkage mechanism includes a lever;

[0019] The lever passes through the transverse lever track guide groove and the handle lever limiting hole, and the two ends of the lever are respectively connected to the first connecting rod and the second connecting rod;

[0020] The other end of the first link is connected to the first crank arm, and the other end of the second link is connected to the second crank arm;

[0021] The first crank arm is welded to the bottom of the first barrel, and the second crank arm is welded to the bottom of the second barrel;

[0022] The first and second crank arms are movably connected to the protruding part of the lifting column and can rotate around the movable connecting shaft.

[0023] The upper end of the lifting column is movably connected to the first barrel and the second barrel.

[0024] The handle has a bend, the straight part of the handle has a locking mechanism, and the top of the handle has a grip bar.

[0025] The locking mechanism includes a locking hook, a locking hook fixing shaft, and a locking hook seat;

[0026] The locking hook is fixed to the upper part of the straight rod of the handle via the locking hook fixing shaft. The locking hook seat is set on the lifting column. When the locking hook is locked on the locking hook seat, the first barrel and the second barrel are closed and locked.

[0027] The bracket is ⊥-shaped, with a first mounting rod and a second mounting rod extending outward from the bottom end;

[0028] The first mounting rod is provided with a first telescopic support leg, and the second mounting rod is provided with a second telescopic support leg.

[0029] The first and second telescopic outriggers are L-shaped.

[0030] The first telescopic outrigger is equipped with a first fixed wheel at one end, and the second telescopic outrigger is equipped with a second fixed wheel at the other end.

[0031] The first telescopic outrigger is connected to the first mounting rod via a first outrigger positioning pin, and the first mounting rod is provided with at least two first outrigger positioning holes. The second telescopic outrigger is connected to the second mounting rod via a second outrigger positioning pin, and the second mounting rod is provided with at least two second outrigger positioning holes.

[0032] The bracket extends outward from the bottom with a mounting rod, and the other end of the mounting rod is provided with a caster seat, in which a caster wheel is provided.

[0033] The first and second mounting rods are reinforced to the vertical part of the bracket by stiffening plates.

[0034] The lifting column has at least two lifting positioning holes, which are connected to the positioning holes of the bracket through lifting positioning pins.

[0035] One of the first barrel and the second barrel has a flow guide pipe welded to its bottom, and a sealing strip is embedded between the contact surfaces of the first barrel and the second barrel.

[0036] To achieve the above objectives, the present invention adopts the following technical solution:

[0037] An operating method for a well fluid control and recovery device for drilling tools during overhaul includes the following steps:

[0038] S1. Operation preparation: After unscrewing the drill rod, remove the hydraulic clamp, adjust the lifting column to a suitable height, and adjust the first telescopic outrigger and the second telescopic outrigger to a suitable width.

[0039] S2. Wrapping the drill pipe: Press down the handle of the recovery bucket, which will drive the connecting rods on both sides to open the first and second buckets to the sides; push the entire recovery bucket to the wellhead so that the drill pipe body is located in the center of the cylinder; lift the operating handle, which will close the first and second buckets inward and wrap the drill pipe; place the guide pipe on the wellbore.

[0040] S3. Steps for lifting the drill pipe: Lift the drill pipe to a certain height, and the liquid in the column will quickly gush out and flow back into the wellbore through the bottom guide pipe;

[0041] S4. Complete the operation and exit: After the drill string is pulled out, press down the handle of the recovery bucket to open the first bucket and the second bucket to both sides; push the whole recovery bucket out of the wellhead; lift the handle, and the second bucket and the first bucket will close inward and the locking hook will be engaged.

[0042] Compared with the prior art, the present invention has the following advantages:

[0043] 1) It can move freely on the drilling platform working surface and complete well workover operations for multiple wellheads with one device;

[0044] 2) The operation is simple and quick, allowing for rapid entry and exit, resulting in high efficiency;

[0045] 3) It can control and recover well fluids that overflow during drilling tool overhaul, thus preventing surface pollution. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the structure of a well fluid control and recovery device for overhaul drilling tools according to the present invention;

[0047] Figure 2 This is a top view of the present invention;

[0048] Figure 3 This is a partially enlarged structural schematic diagram of the present invention.

[0049] In the diagram: 1. Handle; 2. Locking hook fixing shaft; 3. Locking hook; 4. Lifting positioning pin; 5. Lifting positioning hole; 6. Lower connecting pin of the barrel; 7. Horizontal lever track groove; 8. Handle positioning shaft; 9. Universal wheel seat; 10. Universal wheel; 11. Bracket; 12. Rib plate; 13. First telescopic support leg; 14. First fixed wheel; 15. Second fixed wheel; 16. Second telescopic support leg; 17. Guide pipe; 18. First barrel 19. Second barrel body; 20. Connecting pin on barrel body; 21. Lifting column; 22. Locking hook seat; 23. Second leg positioning hole; 24. Second leg positioning pin; 25. Second connecting rod; 26. Lever; 27. Connecting pin; 28. First connecting rod; 29. ​​First leg positioning pin; 30. First leg positioning hole; 31. First crank arm; 32. Slot; 33. Second crank arm; 34. Handle lever limiting hole. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] Please see Figures 1 to 3 The present invention provides a well fluid control and recovery device and operation method for drilling tools during overhaul, comprising a vehicle body, on which a vertical support 11 is provided, and on the support 11 a downward opening and closing device is provided. The opening and closing end of the downward opening and closing device is provided with a first barrel 18 and a second barrel 19, which are joined together. A groove 32 is provided at the bottom joint of the two barrels, and the groove 32 can wrap the drill pipe.

[0052] The pressing opening and closing device includes a handle 1, a lifting column 21, a linkage mechanism, and a locking mechanism; the lifting column 21 is sleeved on the bracket 11, and the lifting column 21 is L-shaped; the handle 1 is connected to one bottom end of the lifting column 21 through a handle fixing shaft 8; the handle 1 can swing back and forth with the handle fixing shaft 8 as the center.

[0053] The linkage mechanism is movably connected to the handle from above the handle fixing shaft 8, and the upper end of the lifting column 21 is movably connected to the second barrel 19 and the first barrel through the connecting pin 27 on the barrel body;

[0054] The handle 1 has a bend, and the straight part of the handle 1 is equipped with a locking mechanism so that the handle 1 and the lifting column 21 can be locked together; a grip bar is provided at the top of the handle 1.

[0055] The horizontal side of the lifting column 21 extends upward to form a fixing plate. The handle fixing shaft 8 is located at the lower part of the fixing plate. A horizontal lever rail guide groove 7 is provided on the upper part of the fixing plate. The handle 1 has a vertical handle lever limiting hole 34 above the handle fixing shaft 8.

[0056] The linkage mechanism includes a lever 26, which passes through a transverse lever guide groove 7 and a handle lever limiting hole 34. The two ends of the lever 26 are respectively connected to a first link 28 and a second link 25. The other end of the first link 28 is connected to a first crank arm 31, and the other end of the second link 25 is connected to a second crank arm 33. The first crank arm 31 is welded to the bottom of the first barrel 18, and the second crank arm 33 is welded to the bottom of the second barrel 19. The first crank arm 31 and the second crank arm 33 are movably connected to the protrusion of the lifting column, specifically through a connecting pin 27.

[0057] When the handle 1 swings backward, it rotates around the handle fixing shaft 8 as the center, causing the lever 26 to move backward along the transverse lever track groove 7. The lever 26 can drive the second connecting rod 25 and the first connecting rod 28 to move backward. Finally, the second connecting rod 25 and the first connecting rod 28 will pull the second crank arm 33 and the first crank arm 31 to move backward, causing the second barrel 19 and the first barrel 18 to rotate around the movable connecting shaft, thus opening the barrel. When the handle 1 returns to its original position, all mechanisms run in reverse to close the barrel.

[0058] The locking mechanism includes a locking hook 3, a locking hook fixing shaft 2, and a locking hook seat 22. The locking hook 3 is fixed to the upper part of the straight rod of the handle 1 through the locking hook fixing shaft 2. The locking hook seat 22 is set on the lifting column 21. When the locking hook 3 is locked on the locking hook seat 22, the first barrel 18 and the second barrel 19 are closed and locked.

[0059] The bracket 11 extends outward from the bottom with a mounting rod, and a universal wheel seat 9 is provided at the other end of the mounting rod. A universal wheel 10 is provided in the universal wheel seat 9. The bracket 11 is ⊥-shaped, and a first mounting rod and a second mounting rod extend outward from the bottom end.

[0060] The first mounting rod is provided with a first telescopic leg 13, and the second mounting rod is provided with a second telescopic leg 16. The first telescopic leg 13 and the second telescopic leg 16 are L-shaped legs. The other end of the first telescopic leg 13 is equipped with a first fixed wheel 14, and the other end of the second telescopic leg is equipped with a second fixed wheel 15. The first telescopic leg 13 is connected to the first mounting rod by a first leg positioning pin 29. The first mounting rod is provided with at least two first leg positioning holes 30. The second telescopic leg 16 is connected to the second mounting rod by a second leg positioning pin 24. The second mounting rod is provided with at least two second leg positioning holes 23. The width between the two telescopic legs can be changed by adjusting the position of the positioning holes.

[0061] The first mounting rod and the second mounting rod are reinforcedly connected to the vertical part of the bracket 11 by stiffening plates 12;

[0062] The lifting column 21 has at least two lifting positioning holes 5, which are connected to the positioning holes of the bracket 11 through lifting positioning pins 4. The overall height of the recycling bin can be changed by adjusting the position of the limiting holes.

[0063] One of the first barrel 18 and the second barrel 19 has a flow guide pipe 17 welded to its bottom, and a sealing strip is embedded between the contact surfaces of the first barrel 18 and the second barrel 19.

[0064] An operating method for a well fluid control and recovery device for drilling tools during overhaul includes the following steps:

[0065] S1. Operation preparation: After unscrewing the drill rod, remove the hydraulic clamp, adjust the lifting column 21 to a suitable height, and adjust the first telescopic outrigger 13 and the second telescopic outrigger 16 to a suitable width.

[0066] S2, Wrapping the drill rod: Press down the handle 1 of the recovery bucket. The handle 1 drives the first connecting rod 28 and the second connecting rod 25, causing the first bucket 18 and the second bucket 19 to open to both sides.

[0067] Push the entire recovery bucket to the wellhead so that the drill pipe body is located in the center of the barrel;

[0068] Lift the operating handle 1, and the second and first recovery buckets 19 and 18 will close inward and wrap the drill rod;

[0069] Install the guide pipe 17 onto the wellbore;

[0070] S3. Pull out the drill pipe: Pull the drill pipe up to a certain height, and the liquid in the column will rush out quickly and flow back into the wellbore through the bottom guide pipe 17.

[0071] S4. Complete the operation and exit: After the drill string is pulled out, press down the handle 1 of the recovery bucket to open the first bucket 18 and the second bucket 19 to both sides; push the whole recovery bucket out of the wellhead; lift the handle 1, and the second and first recovery buckets 19 and 18 close inward and engage the locking hook 3.

[0072] All components not discussed in detail in this application, as well as the connection methods of these components, are well-known technologies in this field. They can be directly applied and will not be elaborated further.

[0073] In this invention, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0074] In the description of this invention, it should be understood that the terms "upper," "lower," "second," "first," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0075] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0076] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A well fluid control and recovery device for overhaul drilling tools, comprising a vehicle body, wherein a vertical support is provided on the vehicle body; Its features are, The support is provided with a pressing opening and closing device. The opening and closing end of the pressing opening and closing device is provided with a first barrel and a second barrel. The first barrel and the second barrel are joined together, and a slot is opened at the joint of the bottom of the two barrels. The pressing opening and closing device includes a handle, a lifting column, a linkage mechanism, and a locking mechanism; The lifting column is fitted onto the bracket. The lifting column is L-shaped. The handle is connected to one end of the bottom of the lifting column via a handle fixing shaft. The handle can swing back and forth about the handle fixing shaft as the center. The horizontal side L of the lifting column extends upward to form a fixing plate; The handle fixing shaft is located at the lower part of the fixing plate, and a transverse lever rail guide groove is provided at the upper part of the fixing plate; The handle has a longitudinal handle lever limiting hole above the handle fixing shaft; The linkage mechanism is movably connected to the handle from above the handle's fixed shaft; the linkage mechanism includes a lever; The lever passes through the transverse lever track guide groove and the handle lever limiting hole, and the two ends of the lever are respectively connected to the first connecting rod and the second connecting rod; The other end of the first link is connected to the first crank arm, and the other end of the second link is connected to the second crank arm; The first crank arm is welded to the bottom of the first barrel, and the second crank arm is welded to the bottom of the second barrel; The first and second crank arms are movably connected to the protruding part of the lifting column and rotate around the movable connecting shaft.

2. The well fluid control and recovery device for overhaul drilling tools according to claim 1, characterized in that, The upper end of the lifting column is movably connected to the first barrel and the second barrel.

3. The well fluid control and recovery device for overhaul drilling tools according to claim 2, characterized in that, The handle has a bend, the straight part of the handle has a locking mechanism, and the top of the handle has a grip bar.

4. The well fluid control and recovery device for overhaul drilling tools according to claim 3, characterized in that, The locking mechanism includes a locking hook, a locking hook fixing shaft, and a locking hook seat; The locking hook is fixed to the upper part of the straight rod of the handle via the locking hook fixing shaft. The locking hook seat is set on the lifting column. When the locking hook is locked on the locking hook seat, the first barrel and the second barrel are closed and locked.

5. A well fluid control and recovery device for overhaul drilling tools according to claim 4, characterized in that, The bracket is ⊥-shaped, with a first mounting rod and a second mounting rod extending outward from the bottom end; The first mounting rod is provided with a first telescopic support leg, and the second mounting rod is provided with a second telescopic support leg. The first and second telescopic outriggers are L-shaped. The first telescopic outrigger is equipped with a first fixed wheel at one end, and the second telescopic outrigger is equipped with a second fixed wheel at the other end. The first telescopic outrigger is connected to the first mounting rod via a first outrigger positioning pin, and the first mounting rod is provided with at least two first outrigger positioning holes. The second telescopic outrigger is connected to the second mounting rod via a second outrigger positioning pin, and the second mounting rod is provided with at least two second outrigger positioning holes.

6. The well fluid control and recovery device for overhaul drilling tools according to claim 5, characterized in that, The bracket extends outward from the bottom with a mounting rod, and the other end of the mounting rod is provided with a caster seat, in which a caster wheel is provided.

7. A well fluid control and recovery device for overhaul drilling tools according to claim 6, characterized in that, The first and second mounting rods are reinforced to the vertical part of the bracket by stiffening plates.

8. A well fluid control and recovery device for overhaul drilling tools according to claim 7, characterized in that, The lifting column has at least two lifting positioning holes, which are connected to the positioning holes of the bracket through lifting positioning pins.

9. A well fluid control and recovery device for overhaul drilling tools according to claim 8, characterized in that, One of the first barrel and the second barrel has a flow guide pipe welded to its bottom, and a sealing strip is embedded between the contact surfaces of the first barrel and the second barrel.

10. A method for operating the well fluid control and recovery device for overhaul drilling tools as described in any one of claims 5 to 9, characterized in that, Includes the following steps: S1. Steps for preparing the assignment; S2, Steps for wrapping the drill pipe; S3, Steps for removing the drill pipe; S4. Steps to complete the task exit.

11. The operating method of the well fluid control and recovery device for overhaul drilling tools according to claim 10, characterized in that, The specific steps are as follows: S1. Operation preparation: After unscrewing the drill rod, remove the hydraulic clamp, adjust the lifting column to a suitable height, and adjust the first telescopic outrigger and the second telescopic outrigger to a suitable width. S2. Wrapping the drill pipe: Press down the handle of the recovery bucket, which will drive the connecting rods on both sides to open the first and second buckets to the sides; push the entire recovery bucket to the wellhead so that the drill pipe body is located in the center of the cylinder; lift the operating handle, which will close the first and second buckets inward and wrap the drill pipe; place the guide pipe on the wellbore. S3. Steps for lifting the drill pipe: Lift the drill pipe to a certain height, and the liquid in the column will quickly gush out and flow back into the wellbore through the bottom guide pipe; S4. Complete the operation and exit: After the drill string is pulled out, press down the handle of the recovery bucket to open the first bucket and the second bucket to both sides; push the whole recovery bucket out of the wellhead; Lift the handle, and the second barrel will close inwards, closing the first barrel and engaging the locking hook.

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