Grease injection well testing blowout prevention control mechanism

Abstract

The utility model relates to the technical field of well testing blowout prevention equipment, in particular to a grease injection well testing blowout prevention control mechanism which comprises a well testing blowout prevention assembly, the well testing blowout prevention assembly comprises a blowout prevention pipe, an annular fixing block is arranged on the outer wall of the blowout prevention pipe, a positioning assembly is arranged on the outer wall of the annular fixing block, and the positioning assembly comprises a semicircular fixing block and a V-shaped pressing plate. First connecting protruding blocks are arranged at the two ends of the convex face of the semicircular fixing block, a fixing connecting rod is arranged on the concave face of the semicircular fixing block, and an arc-shaped pressing plate is arranged at the left end of the fixing connecting rod. According to the grease injection well testing blowout prevention control mechanism, when two threaded rods are screwed down, an annular limiting block extrudes a second connecting protruding block, the relative positions of the second connecting protruding block and a first connecting protruding block are fixed, an arc-shaped pressing plate is matched with a V-shaped pressing plate to extrude the outer wall of a Christmas tree, and therefore a positioning assembly is fixed to the outer wall of the Christmas tree; and therefore, the position of the blowout prevention pipe is effectively fixed, and the stability of the well testing blowout prevention control mechanism during use is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of well testing blowout prevention equipment, in particular to a grease injection well testing blowout prevention control mechanism. Background Art

[0002] Grease injection well testing refers to the technology of improving or stabilizing the well wall by injecting specific fluids (such as chemical substances such as fatty acid salts) into the well during the process of oil drilling and development. This technology is mainly used to control various problems caused by well wall instability, such as well wall collapse and drill pipe jamming. Grease injection operations can effectively improve the safety and reliability of downhole operations and ensure the smooth progress of drilling and well testing operations. Through the scientific and reasonable implementation of grease injection operations, the progress of drilling and well testing can be accelerated while ensuring safety. It is an important technical means in oil drilling and development. When conducting oil well testing operations, due to the instability of the bottom hole pressure, it sometimes increases suddenly, which can easily cause blowout accidents. In this case, a well test blowout prevention device needs to be set up to ensure the safety of operators and equipment.

[0003] The patent with publication number CN214221140U discloses a well testing blowout prevention device, including a blowout prevention assembly and a main body assembly, wherein the blowout prevention assembly includes a blowout preventer, a blowout prevention box, a variable buckle coupling, a pipe body, a ring body, a first arc plate, a through groove, a plate body bearing, a threaded rod, a knob, a second arc plate, a spring, a third arc plate and a fixed plate; a blowout preventer box is installed on the top of the blowout preventer, a variable buckle coupling is installed on the top of the blowout preventer, the bottom of the blowout preventer is connected to the pipe body, and the outer side wall of the blowout preventer is welded with a ring body. When the device is used, the position of the second arc plate is adjusted so that the second arc plate and the third arc plate are closely attached to the oil production tree, thereby improving the fixing effect of the blowout preventer. At the same time, through the setting of the spring, when the pressure in the well is unstable, the vibration of the blowout preventer is buffered, the stability of the blowout preventer is improved, the blowout preventer is prevented from breaking, the safety of the device is improved, and it is beneficial to the blowout prevention use of the well testing.

[0004] In the specific use of the above-mentioned prior art, the third curved plate is brought into contact with the Christmas tree, and then the knob is rotated to drive the threaded rod to rotate in the fixed plate. The threaded rod is rotatably connected to the plate body through the bearing, and the plate body slides in the through groove, so that the threaded rod only drives the plate body to move left and right without rotating, so that the plate body drives the second curved plate to move until the second curved plate contacts the Christmas tree, thereby fixing the Christmas tree. Then, the bolt is rotated in the first arc plate until the bolt fits with the plate body, thereby limiting the position of the plate body and preventing the position of the plate body from shifting, thereby improving the fixing effect with the oil tree. However, this operation requires that the first arc plate be put on the outside of the oil tree first. If the first arc plate cannot move downward from the top of the oil tree and be put on the oil tree, the fixation of the well testing blowout device cannot be achieved, and there is a problem of difficulty in fixing. In addition, since multiple springs are used to connect the third arc plate, the third arc plate is unstable. Once the blowout preventer is vibrated, the blowout preventer lacks rigid fixation, which may cause the connection between the blowout preventer and the pipe body to break, posing a major safety hazard. In view of this, we propose a grease injection well testing blowout prevention control mechanism. Utility Model Content

[0005] The utility model aims to provide a grease injection well test blowout prevention control mechanism to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A grease injection well test blowout prevention control mechanism, comprising a well test blowout prevention assembly, the well test blowout prevention assembly comprising a blowout preventer, the outer wall of the blowout preventer is provided with a vent pipe with a valve, the top of the blowout preventer is provided with a blowout prevention box, the top of the blowout prevention box is provided with a variable buckle coupling, the bottom of the blowout preventer is connected to the well through a connecting pipe body, the well test blowout prevention assembly refers to the structure of a blowout prevention assembly in a well test blowout prevention device with a Chinese utility model patent publication number of CN214221140U, which is a prior art and will not be described in detail here;

[0008] The outer wall of the spray pipe is provided with an annular solid block, which is welded to the outer wall of the spray pipe, and the outer wall of the annular solid block is provided with a positioning assembly, and the positioning assembly comprises a semicircular annular solid block and a V-shaped pressure plate, both ends of the convex surface of the semicircular annular solid block are provided with a first connecting protrusion, the middle part of the concave surface of the semicircular annular solid block is provided with a fixed connecting rod, the left end of the fixed connecting rod is provided with an arc pressure plate, both ends of the V-shaped pressure plate are provided with a second connecting protrusion, the middle parts of the left sides of the two second connecting protrusions are rotatably connected with a rotating rod, the outer wall of the rotating rod is provided with an annular limit block, the right side of the annular limit block is fitted with the left side of the second connecting protrusion, the right ends of the two rotating rods respectively pass through the left sides of the two second connecting protrusions, and the right ends of the two rotating rods are coaxially connected with threaded rods, and the two first connecting protrusions are respectively threadedly connected to the outer sides of the two threaded rods;

[0009] When the two threaded rods are tightened, the annular limit block squeezes the second connecting protrusion, the relative positions of the second connecting protrusion and the first connecting protrusion are fixed, and the arc-shaped pressure plate cooperates with the V-shaped pressure plate to squeeze the outer wall of the oil production tree, so that the positioning assembly is fixed to the outer wall of the oil production tree, and the position of the blowout preventer is effectively fixed to avoid shaking of the blowout preventer when a blowout occurs, thereby ensuring the stability of the well testing blowout prevention control mechanism when in use.

[0010] Preferably, the convex surface of the semicircular ring solid block is provided with two fixing rods symmetrically arranged front and back, and the right ends of the two fixing rods are fixedly connected to the outer wall of the ring solid block, so that the relative position of the semicircular ring solid block and the ring solid block is fixed.

[0011] Preferably, the concave surface of the arc-shaped pressure plate is provided with a first rubber pad, and the shape and size of the first rubber pad are matched with the shape and size of the concave surface of the arc-shaped pressure plate, thereby increasing the friction between the arc-shaped pressure plate and the Christmas tree and improving the stability of the positioning assembly.

[0012] Preferably, a second rubber pad is provided inside the V-shaped pressure plate, and the shape and size of the second rubber pad are matched with the shape and size of the inner side of the V-shaped pressure plate, thereby increasing the friction between the V-shaped pressure plate and the Christmas tree and improving the stability of the positioning assembly.

[0013] Preferably, a rectangular plate is provided on the outer side of the V-shaped pressure plate, the left ends of the two rotating rods both pass through the right side of the rectangular plate, and a bearing is provided at the connection between the rotating rod and the rectangular plate, the outer ring of the bearing is fixedly connected to the rectangular plate, and the inner ring of the bearing is fixedly connected to the rotating rod, so that the relative position of the rotating rod and the rectangular plate is fixed to prevent the rotating rod from moving left and right.

[0014] Preferably, rectangular protrusions are provided at the front and rear ends of the left bottom of the rectangular plate, a rotating shaft is rotatably connected between the two rectangular protrusions, and a worm gear is provided on the outer wall of the rotating shaft near the front and rear ends. A rotating wheel is rotatably connected to the outer side of one of the rectangular protrusions, and the rotating shaft of the rotating wheel is coaxially connected to one end of the rotating shaft. The rotating wheel can facilitate the staff to drive the rotating shaft to rotate.

[0015] Preferably, a worm gear is provided at the left end of the two rotating rods, and the two worm gears are respectively meshed with the two worms for transmission, and the two worms are driven to rotate by the rotating shaft, and the two worms respectively drive the two worm gears to rotate, so that the two worm gears respectively drive the two rotating rods to rotate, and the two rotating rods synchronously drive the two threaded rods to rotate, which is convenient for the staff to quickly complete the docking of the semicircular ring solid block and the V-shaped pressure plate.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. In the grease injection well test blowout prevention control mechanism, when the two threaded rods are tightened, the annular limit block squeezes the second connecting protrusion, the relative positions of the second connecting protrusion and the first connecting protrusion are fixed, and the arc-shaped pressure plate cooperates with the V-shaped pressure plate to squeeze the outer wall of the Christmas tree, so that the positioning assembly is fixed on the outer wall of the Christmas tree, and the position of the blowout preventer is effectively fixed, avoiding the shake of the blowout preventer when a blowout occurs, thereby ensuring the stability of the well test blowout prevention control mechanism when in use.

[0018] 2. The grease injection well test blowout prevention control mechanism has a rotating wheel that allows the staff to drive the rotating shaft to rotate, which drives the two worms to rotate. The two worms drive the two worm wheels to rotate respectively, so that the two worm wheels drive the two rotating rods to rotate respectively, and the two rotating rods synchronously drive the two threaded rods to rotate, which makes it convenient for the staff to quickly complete the docking of the semicircular ring solid block and the V-shaped pressure plate.

[0019] 3. In the grease injection well test blowout prevention control mechanism, a first rubber pad is provided on the concave surface of the arc-shaped pressure plate to increase the friction between the arc-shaped pressure plate and the Christmas tree, and a second rubber pad is provided on the inner side of the V-shaped pressure plate to increase the friction between the V-shaped pressure plate and the Christmas tree and improve the stability of the positioning assembly.

[0020] 4. The grease injection well test blowout prevention control mechanism has a bearing at the connection between the rotating rod and the rectangular plate. The outer ring of the bearing is fixedly connected to the rectangular plate, and the inner ring of the bearing is fixedly connected to the rotating rod, so that the relative position of the rotating rod and the rectangular plate is fixed, avoiding the rotating rod from moving left and right, and does not affect the rotation of the rotating rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2It is a partial structural schematic diagram of the utility model;

[0023] Figure 3 This is one of the partial structural schematic diagrams of the positioning assembly in the utility model;

[0024] Figure 4 This is the second partial structural diagram of the positioning assembly in the utility model;

[0025] Figure 5 It is a schematic diagram of the V-shaped pressing plate structure in the utility model.

[0026] In the figure: 1. well test blowout prevention assembly; 10. blowout preventer; 11. blowout prevention box; 12. buckle coupling; 13. connecting pipe body; 14. vent pipe; 2. annular solid block; 3. positioning assembly; 30. semicircular annular solid block; 300. fixing rod; 301. first connecting protrusion; 302. fixing connecting rod; 303. arc pressure plate; 304. first rubber pad; 31. V-shaped pressure plate; 310. second connecting protrusion; 311. second rubber pad; 32. rectangular plate; 320. rectangular protrusion; 33. bearing; 34. rotating rod; 340. annular limit block; 35. threaded rod; 36. rotating shaft; 37. worm; 38. worm wheel; 39. rotating wheel. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] See also Figure 1-Figure 5 , the utility model provides a technical solution:

[0030] A grease injection well test blowout prevention control mechanism comprises a well test blowout prevention assembly 1, the well test blowout prevention assembly 1 comprises a blowout preventer 10, the outer wall of the blowout preventer 10 is provided with a vent pipe 14 with a valve, the top of the blowout preventer 10 is provided with a blowout prevention box 11, the top of the blowout prevention box 11 is provided with a variable buckle coupling 12, the bottom of the blowout preventer 10 is connected to the well through a connecting pipe body 13, the well test blowout prevention assembly 1 refers to the structure of a blowout prevention assembly in a well test blowout prevention device with a Chinese utility model patent publication number of CN214221140U, which is a prior art and will not be described in detail here;

[0031] The outer wall of the lubricator 10 is provided with an annular solid block 2, which is welded to the outer wall of the lubricator 10. The outer wall of the annular solid block 2 is provided with a positioning assembly 3, which includes a semicircular annular solid block 30 and a V-shaped pressure plate 31. Both ends of the convex surface of the semicircular annular solid block 30 are provided with a first connecting protrusion 301, and the middle part of the concave surface of the semicircular annular solid block 30 is provided with a fixed connecting rod 302. The left end of the fixed connecting rod 302 is provided with an arc pressure plate 303, and both ends of the V-shaped pressure plate 31 are provided with a second connecting protrusion Block 310, the middle parts of the left sides of the two second connection protrusions 310 are rotatably connected with a rotating rod 34, the outer wall of the rotating rod 34 is provided with an annular limit block 340, the right side of the annular limit block 340 is fitted with the left side of the second connection protrusion 310, the right ends of the two rotating rods 34 respectively penetrate the left sides of the two second connection protrusions 310, and the right ends of the two rotating rods 34 are coaxially connected with a threaded rod 35, and the two first connection protrusions 301 are respectively threadedly connected to the outer sides of the two threaded rods 35;

[0032] When the two threaded rods 35 are tightened, the annular limit block 340 squeezes the second connecting protrusion 310, and the relative positions of the second connecting protrusion 310 and the first connecting protrusion 301 are fixed. The arc pressure plate 303 cooperates with the V-shaped pressure plate 31 to squeeze the outer wall of the oil production tree, so that the positioning assembly 3 is fixed to the outer wall of the oil production tree, and the position of the lubricant preventer 10 is effectively fixed, so as to avoid the lubricant preventer 10 from shaking when a blowout occurs, thereby ensuring the stability of the well testing blowout prevention control mechanism when in use.

[0033] In this embodiment, the convex surface of the semicircular ring-shaped solid block 30 is provided with two fixing rods 300 arranged symmetrically in front and back, and the right ends of the two fixing rods 300 are fixedly connected to the outer wall of the annular solid block 2, so that the relative position of the semicircular ring-shaped solid block 30 and the annular solid block 2 is fixed.

[0034] Specifically, the concave surface of the arc pressure plate 303 is provided with a first rubber pad 304 , and the shape and size of the first rubber pad 304 match the shape and size of the concave surface of the arc pressure plate 303 , thereby increasing the friction between the arc pressure plate 303 and the Christmas tree and improving the stability of the positioning assembly 3 .

[0035] Furthermore, a second rubber pad 311 is provided inside the V-shaped pressure plate 31 , and the shape and size of the second rubber pad 311 match the shape and size of the inside of the V-shaped pressure plate 31 , thereby increasing the friction between the V-shaped pressure plate 31 and the Christmas tree and improving the stability of the positioning assembly 3 .

[0036] Furthermore, a rectangular plate 32 is provided on the outer side of the V-shaped pressure plate 31, and the left ends of the two rotating rods 34 both pass through the right side of the rectangular plate 32, and a bearing 33 is provided at the connection between the rotating rod 34 and the rectangular plate 32. The outer ring of the bearing 33 is fixedly connected to the rectangular plate 32, and the inner ring of the bearing 33 is fixedly connected to the rotating rod 34, so that the relative position of the rotating rod 34 and the rectangular plate 32 is fixed to prevent the rotating rod 34 from moving left and right.

[0037] Furthermore, rectangular protrusions 320 are provided at the front and rear ends of the left bottom of the rectangular plate 32, and a rotating shaft 36 is rotatably connected between the two rectangular protrusions 320. A worm gear 37 is provided on the outer wall of the rotating shaft 36 near the front and rear ends. A rotating wheel 39 is rotatably connected to the outer side of one of the rectangular protrusions 320, and the rotating shaft of the rotating wheel 39 is coaxially connected to one end of the rotating shaft 36. The rotating wheel 39 can facilitate the staff to drive the rotating shaft 36 to rotate.

[0038] Furthermore, a worm gear 38 is provided at the left end of the two rotating rods 34, and the two worm gears 38 are respectively meshed with the two worm screws 37 for transmission, and the two worm screws 37 are driven to rotate by the rotating shaft 36. The two worm screws 37 respectively drive the two worm gears 38 to rotate, so that the two worm gears 38 respectively drive the two rotating rods 34 to rotate, and the two rotating rods 34 synchronously drive the two threaded rods 35 to rotate, so that the staff can quickly complete the docking of the semicircular ring solid block 30 and the V-shaped pressure plate 31.

[0039] When the grease injection well testing blowout prevention control mechanism of this embodiment is in use, the staff will make the arc pressure plate 303 butt against the outer wall of the oil production tree, then dock the right ends of the two threaded rods 35 with the two first connecting protrusions 301 respectively, and then rotate the rotating wheel 39, the rotating wheel 39 drives the rotating shaft 36 to rotate, the rotating shaft 36 drives the two worms 37 to rotate, the two worms 37 respectively drive the two worm wheels 38 to rotate, so that the two worm wheels 38 respectively drive the two rotating rods 34 to rotate, so that the two rotating rods 34 synchronously drive the two threaded rods 35 to rotate, the two threaded rods 35 are respectively threadedly connected with the two first connecting protrusions 301, and the threaded rods 35 drive the second connecting protrusion 310 to move toward the first connecting protrusion 301 until both the V-shaped pressure plate 31 and the arc pressure plate 303 generate extrusion force on the oil production tree, so that the positioning assembly 3 is fixed to the outer wall of the oil production tree, and then the position of the blowout preventer 10 is effectively fixed, so as to avoid the shake of the blowout preventer 10 when a blowout occurs, so as to ensure the stability of the well testing blowout prevention control mechanism when in use.

[0040] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A grease injection well test blowout prevention control mechanism, comprising a well test blowout prevention assembly (1), the well test blowout prevention assembly (1) comprising a blowout preventer (10), the outer wall of the blowout preventer (10) is provided with a vent pipe (14) with a valve, the top of the blowout preventer (10) is provided with a blowout prevention box (11), the top of the blowout prevention box (11) is provided with a variable buckle coupling (12), the bottom of the blowout preventer (10) is connected to the well through a connecting pipe body (13), and is characterized in that: The outer wall of the blowout preventer (10) is provided with an annular solid block (2), the outer wall of the annular solid block (2) is provided with a positioning assembly (3), the positioning assembly (3) comprises a semicircular annular solid block (30) and a V-shaped pressing plate (31), both ends of the convex surface of the semicircular annular solid block (30) are provided with a first connecting protrusion (301), the middle part of the concave surface of the semicircular annular solid block (30) is provided with a fixed connecting rod (302), the left end of the fixed connecting rod (302) is provided with an arc-shaped pressing plate (303), and both ends of the V-shaped pressing plate (31) are provided with a second connecting protrusion (310). The middle parts of the left sides of the two second connection protrusions (310) are rotatably connected to a rotating rod (34); an annular limiting block (340) is provided on the outer wall of the rotating rod (34); the right side of the annular limiting block (340) fits with the left side of the second connection protrusion (310); the right ends of the two rotating rods (34) respectively penetrate the left sides of the two second connection protrusions (310); the right ends of the two rotating rods (34) are coaxially connected to a threaded rod (35); and the two first connection protrusions (301) are respectively threadedly connected to the outer sides of the two threaded rods (35).

2. The grease injection well test blowout prevention control mechanism according to claim 1, characterized in that: The convex surface of the semicircular annular solid block (30) is provided with two fixing rods (300) arranged symmetrically in front and back, and the right ends of the two fixing rods (300) are fixedly connected to the outer wall of the annular solid block (2).

3. The grease injection well test blowout prevention control mechanism according to claim 1, characterized in that: The concave surface of the arc-shaped pressing plate (303) is provided with a first rubber pad (304), and the shape and size of the first rubber pad (304) are compatible with the shape and size of the concave surface of the arc-shaped pressing plate (303).

4. The grease injection well test blowout prevention control mechanism according to claim 1, characterized in that: A second rubber pad (311) is provided on the inner side of the V-shaped pressing plate (31), and the shape and size of the second rubber pad (311) are compatible with the shape and size of the inner side of the V-shaped pressing plate (31).

5. The grease injection well test blowout prevention control mechanism according to claim 1, characterized in that: A rectangular plate (32) is provided on the outer side of the V-shaped pressure plate (31), the left ends of the two rotating rods (34) both penetrate the right side of the rectangular plate (32), and a bearing (33) is provided at the connection between the rotating rod (34) and the rectangular plate (32), the outer ring of the bearing (33) is fixedly connected to the rectangular plate (32), and the inner ring of the bearing (33) is fixedly connected to the rotating rod (34).

6. The grease injection well test blowout prevention control mechanism according to claim 5, characterized in that: Rectangular protrusions (320) are provided at both the front and rear ends of the left bottom of the rectangular plate (32); a rotating shaft (36) is rotatably connected between the two rectangular protrusions (320); a worm (37) is provided on the outer wall of the rotating shaft (36) near the front and rear ends; a rotating wheel (39) is rotatably connected to the outer side of one of the rectangular protrusions (320); and the rotating shaft of the rotating wheel (39) is coaxially connected to one end of the rotating shaft (36).

7. The grease injection well test blowout prevention control mechanism according to claim 6, characterized in that: A worm wheel (38) is provided at the left end of each of the two rotating rods (34), and the two worm wheels (38) are respectively meshed with the two worms (37) for transmission.

Images