A casing head bore polishing device for oil wellheads

Abstract

The present application relates to the technical field of drilling and polishing equipment, in particular to a casing head drilling and polishing device for an oil well head, which comprises a main body, one end of the main body is provided with a three-jaw chuck, the main body is used for driving the three-jaw chuck to rotate, the other end of the main body is slidably provided with a moving seat, one end of the moving seat is fixedly connected with a rotating mechanism, the rotating mechanism comprises a fixed rod, and the outer side wall of one end of the fixed rod is rotatably connected with an outer sleeve pipe. In the present application, through the setting of the rotating mechanism, the revolution of the outer sleeve pipe drives the drill rod to revolve, so that the drill rod and the casing head rotate synchronously, and since the fixed rod remains stationary, the bevel gear one meshes with the bevel gear two, so that when the bracket revolves, the bevel gear two drives the edge rod two to revolve, thereby driving the drill rod to revolve, and under the centrifugal force of the revolution, the drill rod, the rotating fastener and the edge rod two move outward, so that the drill rod contacts and extrudes the side hole, thereby realizing the drilling and diameter expansion of the inner end of the side hole.

Description

Technical Field

[0001] This invention relates to the field of drilling and grinding equipment technology, specifically to a casing head drilling and grinding device for oil wellheads. Background Technology

[0002] The casing head is used to fix the wellhead of the drilled well, connect the wellhead casing string, support the weight of the technical casing and the oil layer casing, seal the annular space between each layer of casing, provide a transition connection for the installation of blowout preventers, tubing heads, and production trees, and through the two side ports on the casing head body, construction operations such as mud filling, monitoring, and adding balancing fluid can be performed. During the processing of the casing head, in addition to the flange connection hole, side holes such as observation holes, positioning holes, and glue injection holes need to be made on the outer wall of the casing head. For better sealing, some side holes need to be enlarged at the inner end to install sealing elements, which requires secondary processing of the side holes. Existing drilling equipment generally drills from the outside of the pipe to the inside, so it is not suitable for drilling with enlarged inner ends of side holes, as it is not easy to work in the limited space inside the casing. Summary of the Invention

[0003] To overcome the aforementioned technical problems, the present invention aims to provide a casing head drilling and grinding device for oil wellheads. Through the setting of a rotating mechanism, one end of the casing head to be processed is clamped with a three-jaw chuck. After the rotating mechanism is inserted into the casing head, the outer casing is fixed to the casing head via a support assembly. The main body drives the three-jaw chuck to rotate, thereby causing the casing head to rotate. The casing head drives the outer casing to rotate via the support assembly, causing the outer casing's rotation to drive the drill pipe's revolution through the support, resulting in synchronous rotation between the drill pipe and the casing head. Since the fixed rod remains stationary, bevel gear one and bevel gear two mesh, causing the support to rotate, which in turn drives the ridge bar two to rotate, thereby causing the drill pipe to rotate. Under the centrifugal force of the revolution, the drill pipe, rotating fastener, and ridge bar two move outward, causing the drill pipe to contact and press against the side hole. Simultaneously, the rotation of the drill pipe expands the inner diameter of the side hole.

[0004] The objective of this invention can be achieved through the following technical solutions:

[0005] A casing head drilling and grinding device for oil wellheads includes a main body. A three-jaw chuck is mounted at one end of the main body, which drives the chuck to rotate. A movable seat is slidably mounted at the other end of the main body. A rotating mechanism is fixedly connected to one end of the movable seat. The rotating mechanism includes a fixed rod, with an outer sleeve rotatably connected to the outer wall of one end of the fixed rod. The other end of the fixed rod is fixedly connected to one end of the movable seat. A support assembly is fixedly connected to the outer wall of the outer sleeve. A bevel gear is fixedly sleeved on one end of the fixed rod. Supports are fixedly connected to both sides of the outer wall of the outer sleeve, and sliding sleeves are rotatably sleeved on one end of each support. One end of each sliding sleeve is fixedly connected to a bevel gear, which meshes with a second bevel gear for transmission. A second prism is slidably fitted onto the inner wall of one sliding sleeve. One end of the second prism is provided with a rotating fastener, and one end of the rotating fastener is detachably connected to a drill rod. A limit assembly is provided between the two supports. The outer sleeve is fixedly connected to the inner wall of the casing head through the support assembly. The casing head is driven to rotate actively by a three-jaw chuck, which causes the casing head to drive the outer sleeve to rotate. The outer sleeve drives the drill rod to revolve through the support rod and the second bevel gear, while simultaneously driving the drill rod to rotate on its own axis. Under the action of centrifugal force, the drill rod moves outward and contacts the inner wall of the casing head, thereby expanding the diameter of the inner end of the opposite hole.

[0006] Furthermore, the support assembly includes a movable sleeve that is slidably sleeved with the outer wall of the other end of the outer sleeve. The outer side of the outer sleeve is provided with three contact plates at equal angles. Two connecting rods are rotatably connected to the middle position of one side of the contact plates. One end of one connecting rod is rotatably connected to the outer wall of the movable sleeve, and one end of the other connecting rod is rotatably connected to the outer wall of the outer sleeve. The support assembly fixes the outer sleeve and the inner wall of the sleeve head.

[0007] Furthermore, the outer wall of the other end of the outer sleeve is provided with a threaded groove, and the other end of the outer sleeve is screwed with an internal threaded sleeve. Rotating the internal threaded sleeve pushes the moving sleeve, causing the contact plate to move outward.

[0008] Furthermore, the bottom end of the second prism rod is fixedly sleeved with a limiting plate. The limiting component includes a round rod and a lead screw. Support rods are fixedly connected to both sides of one end of the bracket. Both ends of the round rod are fixedly connected to the adjacent support rods. Both ends of the lead screw are rotatably connected to one end of the two adjacent support rods. A crossbar is provided between the round rod and the lead screw. One end of the crossbar is slidably sleeved with the round rod. The other end of the crossbar is screwed to the lead screw. A prism hole is opened at one end of the lead screw. A limiting ring is fixedly connected to the middle position of the crossbar.

[0009] Furthermore, a circular hole is provided on the outer side wall of the other end of the second prism rod, and a kit is fixedly connected to the bottom end of the rotating fastener. The kit is slidably inserted into the top end of the second prism rod, and a fastening bolt is screwed onto the outer side wall of the kit. One end of the fastening bolt is screwed onto the circular hole, which facilitates the detachable connection of the rotating fastener. The drill rod is clamped and fixed by the rotating fastener, and it is also convenient to replace drill rods of different outer diameters as needed.

[0010] Furthermore, one end of the second prism is slidably inserted into the inner wall of the first prism, and grinding parts are fixedly connected to both sides of the outer wall of one end of the first prism. The first prism is slidably inserted into the adjacent sliding sleeve. When the second prism rotates, it drives the first prism to rotate, so that while the drill rod drills a hole at one side hole position, the inner end of the second prism is ground and chamfered at the other side hole.

[0011] Furthermore, a drive slide rail is installed at the other end of the main body. The moving end of the drive slide rail is fixedly connected to the moving seat. The moving seat is moved by controlling the drive slide rail, thereby driving the rotating mechanism to be inserted into the sleeve head.

[0012] Furthermore, the outer sidewall of the contact plate is an arc-shaped sidewall, which facilitates the contact plate to abut against the inner wall of the sleeve head, and makes it convenient for the sleeve head to drive the outer sleeve to rotate through the support assembly.

[0013] Furthermore, a bearing is installed between one end of the outer sleeve and the outer wall of the fixing rod to reduce friction between the fixing rod and the outer sleeve and facilitate the rotation of the outer sleeve.

[0014] Furthermore, the grinding component includes an inclined portion, and the outer surface of the inclined portion is an abrasive surface, which facilitates grinding and chamfering of the inner end of the side hole through the inclined portion of the grinding component, thereby realizing grinding after enlarging the inner end of the side hole.

[0015] The beneficial effects of this invention are:

[0016] 1. Through the setting of the rotating mechanism, an outer sleeve is rotatably connected to the outer wall of one end of the fixed rod, and the other end of the fixed rod is fixedly connected to one end of the movable seat. A support assembly is fixedly connected to the outer wall of the outer sleeve. A bevel gear two is fixedly sleeved at one end of the fixed rod. Brackets are fixedly connected to both sides of the outer wall of the outer sleeve, and sliding sleeves are rotatably sleeved at one end of each bracket. A bevel gear one is fixedly sleeved at one end of one sliding sleeve. One end of the sleeve head to be processed is clamped with a three-jaw chuck. After the rotating mechanism is inserted into the sleeve head, the outer sleeve and the sleeve head are fixed together by the support assembly. The main body drives the three-jaw chuck. The chuck rotates, which in turn drives the casing head to rotate. The casing head drives the outer casing to rotate through the support assembly. The rotation of the outer casing drives the drill rod to revolve through the bracket, so that the drill rod and the casing head rotate synchronously. Since the fixed rod remains stationary, bevel gear one and bevel gear two mesh. When the bracket revolves, bevel gear two drives the rib two to rotate, which in turn drives the drill rod to rotate. Under the centrifugal force of the revolution, the drill rod, rotating fastener, and rib two move the drill rod outward, so that the drill rod contacts and squeezes the side hole. At the same time, the rotation of the drill rod expands the diameter of the inner end of the side hole.

[0017] 2. With the setting of the first rib, as the drilling depth of the drill rod increases, the drill rod moves outward under centrifugal force until the limiting plate is blocked by the limiting ring, thereby limiting the further drilling of the drill rod. This causes the drill rod to stop drilling after reaching a certain depth, thus completing the enlargement of the inner end of the side hole. At the same time, when the second rib rotates, it drives the first rib to rotate. The first rib performs chamfering and grinding on the inner end of the other side hole. Since the first rib also contacts the inner end of the side hole through centrifugal force, it is convenient for the first rib to fit the curved outer edge of the inner end of the side hole for grinding and chamfering, which facilitates the use of the inner end of the side hole and reduces the burrs generated after the hole is enlarged.

[0018] 3. By setting the limiting component, the crossbeam is moved downward by turning the screw with a wrench, and the height of the crossbeam is adjusted. As the drilling depth of the drill rod increases, the drill rod moves outward under centrifugal force until the limiting plate is blocked by the limiting ring, thereby limiting the further drilling of the drill rod. This allows the drill rod to stop drilling after reaching a certain depth, thus achieving adjustment and control of the hole enlargement processing depth. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the rotating mechanism in use in this invention;

[0022] Figure 3 This is a schematic diagram of the rotating mechanism structure in this invention;

[0023] Figure 4This is a front view schematic diagram of the rotating mechanism in this invention;

[0024] Figure 5 This is a schematic diagram of the structure of prism bar two and prism bar one in this invention;

[0025] Figure 6 This is a schematic diagram of the limiting component structure in this invention;

[0026] Figure 7 This is a schematic diagram showing the positions of the crossbar and the rib in this invention.

[0027] In the diagram: 100, main body; 110, drive slide rail; 120, moving seat; 130, three-jaw chuck; 200, rotating mechanism; 210, fixed rod; 220, outer sleeve; 221, internal threaded sleeve; 230, support assembly; 231, moving sleeve; 232, connecting rod; 233, contact plate; 240, bracket; 241, sliding sleeve; 242, support rod; 243, bevel gear one; 250, bevel gear two; 260, rib bar one; 261, grinding part; 270, limiting assembly; 271, round rod; 272, lead screw; 273, cross frame; 274, limiting ring; 280, rib bar two; 281, round hole; 282, limiting plate; 290, rotating fastener; 291, kit; 292, fastening bolt; 300, drill rod. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figure 1-7As shown, a casing head drilling and grinding device for oil wellheads includes a main body 100. A three-jaw chuck 130 is mounted on one end of the main body 100, which drives the three-jaw chuck 130 to rotate. A movable seat 120 is slidably mounted on the other end of the main body 100. A rotating mechanism 200 is fixedly connected to one end of the movable seat 120. The rotating mechanism 200 includes a fixed rod 210. An outer sleeve 220 is rotatably connected to the outer wall of one end of the fixed rod 210. The other end of the fixed rod 210 is fixedly connected to one end of the movable seat 120. A support assembly 230 is fixedly connected to the outer wall of the outer sleeve 220. A bevel gear 250 is fixedly sleeved on one end of the fixed rod 210. Supports 240 are fixedly connected to both sides of the outer wall of the outer sleeve 220. A sliding sleeve 241 is rotatably sleeved on one end of each support 240. One end of 41 is fixedly connected to a bevel gear 243, which meshes with a bevel gear 250. A slidable rib 280 is slidably sleeved on the inner wall of a sliding sleeve 241. A rotating fastener 290 is provided at one end of the rib 280, and a drill rod 300 is detachably connected to one end of the rotating fastener 290. A limit assembly 270 is provided between the two supports 240. The outer sleeve 220 is fixedly connected to the inner wall of the sleeve head by the support assembly 230. The three-jaw chuck 130 drives the sleeve head to rotate actively, so that the sleeve head drives the outer sleeve 220 to rotate. The outer sleeve 220 drives the drill rod 300 to revolve through the support rod 242 and the bevel gear 250, while also driving the drill rod 300 to rotate on its own axis. Under the action of centrifugal force, the drill rod 300 moves outward and contacts the inner wall of the sleeve head, realizing the expansion of the inner end of the hole on the opposite side.

[0030] The support assembly 230 includes a movable sleeve 231, which is slidably sleeved with the outer wall of the other end of the outer sleeve 220. Three contact plates 233 are circumferentially and equidistantly arranged on the outer side of the outer sleeve 220. Two connecting rods 232 are rotatably connected to the middle position of one side of each contact plate 233. One end of one connecting rod 232 is rotatably connected to the outer wall of the movable sleeve 231, and one end of the other connecting rod 232 is rotatably connected to the outer wall of the outer sleeve 220. The support assembly 230 fixes the outer sleeve 220 to the inner wall of the sleeve head. A threaded groove is formed on the outer wall of the other end of the outer sleeve 220, and an internally threaded sleeve 221 is screwed onto the other end of the outer sleeve 220. Rotating the internally threaded sleeve 221... 1. This pushes the movable sleeve 231, causing the contact plate 233 to move outward. The bottom end of the second prism rod 280 is fixedly sleeved with the limit plate 282. The limit assembly 270 includes a round rod 271 and a lead screw 272. Support rods 242 are fixedly connected to both sides of one end of the bracket 240. Both ends of the round rod 271 are fixedly connected to the adjacent support rods 242. Both ends of the lead screw 272 are rotatably connected to one end of the two adjacent support rods 242. A cross frame 273 is provided between the round rod 271 and the lead screw 272. One end of the cross frame 273 is slidably sleeved with the round rod 271. The other end of the cross frame 273 is screwed to the lead screw 272. A prism hole is opened at one end of the lead screw 272. A limit ring 274 is fixedly connected to the middle position of the cross frame 273.

[0031] A circular hole 281 is provided on the outer side wall of the other end of the second prism 280. A kit 291 is fixed to the bottom end of the rotating fastener 290. The kit 291 is slidably inserted into the top end of the second prism 280. A fastening bolt 292 is screwed onto the outer side wall of the kit 291, and one end of the fastening bolt 292 is screwed into the circular hole 281, which facilitates the detachable connection of the rotating fastener 290. The drill rod 300 is clamped and fixed by the rotating fastener 290, and it is also convenient to replace the drill rod 300 with different outer diameters as needed. One end of the drill rod 300 is slidably inserted into the inner wall of the drill rod 260. Both sides of the outer wall of the drill rod 260 are fixedly connected to grinding parts 261. The drill rod 260 is slidably inserted into the adjacent sliding sleeve 241. When the second drill rod 280 rotates, it drives the first drill rod 260 to rotate, so that while the drill rod 300 drills a hole at one side hole position, the first drill rod 260 grinds and chamfers the inner end of the opposite side hole. The rotating fastener 290 is an existing structure. By rotating the outer sleeve, the inner sleeve is pressed towards the middle to lock one end of the drill rod 300.

[0032] The other end of the main body 100 is equipped with a drive slide rail 110. The moving end of the drive slide rail 110 is fixedly connected to the moving seat 120. The moving seat 120 is moved by the drive slide rail 110, thereby driving the rotating mechanism 200 to be inserted into the sleeve head. The outer wall of the contact plate 233 is an arc-shaped side wall, which facilitates the contact plate 233 to abut against the inner wall of the sleeve head. It is convenient for the sleeve head to drive the outer sleeve 220 to rotate through the support assembly 230. A bearing is installed between one end of the outer sleeve 220 and the outer wall of the fixing rod 210 to reduce the friction between the fixing rod 210 and the outer sleeve 220 and facilitate the rotation of the outer sleeve 220. The grinding part 261 includes an inclined part, and the outer surface of the inclined part is an abrasive surface, which facilitates the grinding and chamfering of the inner end of the side hole through the inclined part of the grinding part 261, thereby realizing the grinding after the inner end of the side hole is enlarged.

[0033] Working principle: In use, clamp one end of the casing head to be processed with the three-jaw chuck 130. Turn the screw 272 with a wrench to move the crossbeam 273 downward, adjusting the height of the crossbeam 273 to control the drilling depth of the drill rod 300. Control the drive slide rail 110 to move the moving seat 120 towards the casing head, insert the rotating mechanism 200 into the casing head, so that the drill rod 300 and the rib 260 reach the side hole position. Rotate the outer sleeve 220 to adjust the drill rod 300. The angle between the drill rod 300 and the rib 260 is such that the drill rod 300 is aligned with one side hole. Since the side holes are mostly symmetrically distributed, when the drill rod 300 is aligned with one side hole, the rib 260 is aligned with the other side hole. Rotating the internal thread sleeve 221 causes the internal thread sleeve 221 to push the moving sleeve 231 to the left, which reduces the angle between the two connected rods 232. The contact plate 233 moves outward and presses against the inner wall of the sleeve head, thereby fixing the outer sleeve 220 to the sleeve head.

[0034] The main body 100 drives the three-jaw chuck 130 to rotate, thereby causing the casing head to rotate. The casing head drives the outer casing 220 to rotate via the support assembly 230. The rotation of the outer casing 220 causes the drill rod 300 to revolve via the bracket 240, making the drill rod 300 and the casing head rotate synchronously. Since the fixed rod 210 remains stationary, the first bevel gear 243 meshes with the second bevel gear 250. When the bracket 240 revolves, the second bevel gear 250 drives the second rib 280 to rotate, thereby causing the drill rod 300 to rotate. Under the centrifugal force of the revolution, the drill rod 300, the rotating fastener 290, and the second rib 280 move outward, thus causing the drill rod 300 to move with the side... The holes contact and squeeze, while the rotation of the drill rod 300 expands the diameter of the inner end of the side hole. As the drilling depth of the drill rod 300 increases, the drill rod 300 moves outward under centrifugal force until the limiting plate 282 is blocked by the limiting ring 274, thereby limiting the further penetration of the drill rod 300. This causes the drill rod 300 to stop drilling after reaching a certain depth, thus completing the expansion of the inner end of the side hole. At the same time, when the second prism rod 280 rotates, it drives the first prism rod 260 to rotate. The first prism rod 260 is used to chamfer and grind the inner end of the other side hole. Since the first prism rod 260 also contacts the inner end of the side hole through centrifugal force, it is convenient for the first prism rod 260 to fit the curved outer edge of the inner end of the side hole for grinding and chamfering.

[0035] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, 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.

[0036] The above description is merely an example and illustration of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A casing head bore polishing device for use in oil wells, comprising a body (100), characterised in that, A three-jaw chuck (130) is mounted on one end of the main body (100), which drives the three-jaw chuck (130) to rotate. A movable seat (120) is slidably mounted on the other end of the main body (100). A rotating mechanism (200) is fixedly connected to one end of the movable seat (120). The rotating mechanism (200) includes a fixed rod (210). The outer wall of one end of the fixed rod (210) is rotatably connected to an outer sleeve (220). The other end of the fixed rod (210) is fixedly connected to one end of the movable seat (120). A support assembly (230) is fixedly connected to the outer wall of the outer sleeve (220). One end of the fixed rod (210) is fixedly sleeved with... There is a second bevel gear (250). Both sides of the outer wall of the outer sleeve (220) are fixedly connected to the bracket (240). One end of the bracket (240) is rotatably sleeved with a sliding sleeve (241). One end of the sliding sleeve (241) is fixedly sleeved with a first bevel gear (243). The first bevel gear (243) and the second bevel gear (250) mesh and drive each other. The inner wall of the sliding sleeve (241) is slidably sleeved with a second prism rod (280). One end of the second prism rod (280) is provided with a rotating fastener (290). One end of the rotating fastener (290) is detachably connected to a drill rod (300). A limit assembly (270) is provided between the two brackets (240). The bottom end of the second prism (280) is fixedly sleeved with a limiting plate (282). The limiting component (270) includes a round rod (271) and a lead screw (272). Both sides of one end of the bracket (240) are fixedly connected with support rods (242). Both ends of the round rod (271) are fixedly connected with the adjacent support rods (242). Both ends of the lead screw (272) are rotatably connected to one end of the two adjacent support rods (242). A cross frame (273) is provided between the round rod (271) and the lead screw (272). One end of the cross frame (273) is slidably sleeved with the round rod (271). The other end of the cross frame (273) is screwed to the lead screw (272). One end of the lead screw (272) is provided with a prism hole. A limiting ring (274) is fixedly connected to the middle position of the cross frame (273).

2. A casing head bore polishing device for use with an oil well head as claimed in claim 1, characterised in that, The support assembly (230) includes a movable sleeve (231), which is slidably sleeved with the outer wall of the other end of the outer sleeve (220). The outer sleeve (220) has three contact plates (233) arranged at equal angles on the outer side. Two connecting rods (232) are rotatably connected to the middle position of one side of the contact plate (233). One end of one connecting rod (232) is rotatably connected to the outer wall of the movable sleeve (231), and one end of the other connecting rod (232) is rotatably connected to the outer wall of the outer sleeve (220).

3. A casing head bore polishing device for use with an oil well head as claimed in claim 2, characterised in that, The outer wall of the other end of the outer sleeve (220) is provided with a threaded groove, and the other end of the outer sleeve (220) is screwed with an internal threaded sleeve (221).

4. A casing head bore polishing device for use with an oil well head as defined in claim 1, wherein, The outer side wall of the other end of the second prism rod (280) is provided with a circular hole (281), the bottom end of the rotating fastener (290) is fixedly connected with a sleeve (291), the sleeve (291) is slidingly inserted into the top end of the second prism rod (280), the outer side wall of the sleeve (291) is screw-connected with a fastening bolt (292), and one end of the fastening bolt (292) is screw-connected with the circular hole (281).

5. A casing head bore polishing device for use with an oil well head as defined in claim 1, wherein, The inner wall of one end of the second prism rod (280) is slidingly inserted with a first prism rod (260), the outer side wall of one end of the first prism rod (260) is fixedly connected with polishing pieces (261) on both sides, and the first prism rod (260) is slidingly inserted into the sliding sleeve (241) in close proximity.

6. A casing head bore polishing device for use with an oil well head as defined in claim 1, wherein, The other end of the main body (100) is provided with a driving sliding rail (110), and the moving end of the driving sliding rail (110) is fixedly connected with a moving seat (120).

7. A casing head bore polishing device for use with an oil well head as defined in claim 2, wherein, The outer side wall of the contact plate (233) is an arc-shaped side wall.

8. A casing head bore polishing device for use with an oil well head as defined in claim 1, wherein, A bearing is arranged between the outer side wall of the fixed rod (210) and one end of the outer sleeve (220).

9. A casing head bore polishing device for use with an oil well head as defined in claim 5, wherein, The polishing piece (261) comprises an inclined portion, and the outer surface of the inclined portion is an abrasive surface.

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