Automatic screw thread oil spraying device for oil casing coupling threads

Abstract

An automatic screw thread oil spraying device for oil casing coupling threads comprises an oil coating head and a screw thread oil tank, the screw thread oil tank supplies screw thread oil to the oil coating head, the automatic screw thread oil spraying device further comprises a mounting seat and a lifting mechanism, the lifting mechanism drives the oil coating head to ascend and descend relative to the mounting seat, and the oil coating head comprises an oil coating column, a sieve-shaped core cylinder and a rotary driving motor. Screen holes are formed in the circumferential side wall of the sieve-shaped core barrel, and the screw thread oil tank squeezes screw thread oil into the sieve-shaped core barrel located below the oil coating column through the oil passing cavity in the oil coating column. The sieve-shaped core cylinder is driven by the lifting mechanism to extend out of a through hole formed in the mounting base and is driven by the rotary driving motor to rotate, and therefore screw thread oil is thrown to the surface of a hoop female buckle. The automatic oiling device has the advantages of being high in oiling efficiency, even in oiling, free of frequent replacement of accessories and accurate in pneumatic control.

Description

Technical Field

[0001] The utility model relates to the field of oiling of a casing collar box of a petroleum drilling, in particular to an automatic thread oil spraying device for a thread of an oil casing coupling. Background Art

[0002] In oil and drilling operations, the threads of oil pipes need to be connected through ferrules and lowered into the well. In order to better protect the threads from sticking and rusting and to ensure the sealing of the threaded connection, thread oil needs to be applied to the ferrule mother buckle. The traditional method is to apply thread oil manually with a brush. This method is greatly affected by human factors and is prone to uneven application, so that the threads cannot be protected by thread oil, resulting in problems such as short service life of the oil pipe threads and leakage, and even the serious consequence of replacing the oil pipe, resulting in frequent well repair operations and high pressure.

[0003] Therefore, many manufacturers have begun to develop corresponding oiling products in order to solve the problems of uneven oiling and low efficiency. For example, the Chinese utility model patent with the authorization announcement number CN211756400U, entitled a device for applying oil to a female thread of a petroleum drilling casing, discloses: an oiling head and a screw, wherein the oiling head is fixed to the screw by bolts, the screw is covered with a jacket and is threadedly connected to the jacket, the top of the jacket is fixed to a circular ring fixing platform, the top of the circular ring fixing platform is fixed to a hollow truncated cone, the oil storage pipe is passed through the inner cavity of the oiling head and the screw, the top of the oil storage pipe is connected to the adjusting bolt through a bearing, the lower part of the oil storage pipe is provided with an oil outlet, the side of the oiling head is provided with a horizontally arranged oil outlet cavity, and brushes are fixed on the upper and lower sides of the oil outlet cavity. The technical solution described in the utility model is to discharge oil through a horizontally arranged oil outlet cavity opened on the side of the oiling head, and then evenly apply it through a brush, which is too inefficient and difficult to control the oiling situation, and the brush is easily consumed and damaged, and it is cumbersome to replace.

[0004] For another example, a Chinese utility model entitled a device for applying oil to a female thread of a petroleum drilling casing with an authorization announcement number of CN217250267U discloses: it includes a rotating column, a coating head is provided at the bottom of the rotating column, an oil inlet chamber is provided in the rotating column and the coating head, oil discharge ports are provided on both sides of the oil inlet chamber and at the position of the coating head, a brush is provided on the side of the oil discharge port, the rotating column is rotatably arranged on a support plate, a collar is provided at the bottom of the support plate and at the outer side of the rotating column, a support frame is provided on the support plate, a handle is provided on one side of the support frame, an oil pipe is rotatably arranged on the rotating column and the oil pipe is connected to the oil inlet chamber, the top of the oil pipe is fixedly provided on the support frame, an oil inlet pipe is provided on one side of the oil pipe and is connected to the oil outlet end of an external oil pump inserted into the oil cylinder through the oil inlet pipe, and a driving device that can drive the rotating column to rotate is provided on the support plate. The technical solution of the utility model, although the rotary column is driven to rotate by the driving device, still uses the oil discharge ports on both sides of the oil inlet chamber to discharge the oil, the oil discharge amount is small, the oil output is small, and the oiling efficiency is low. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an automatic thread oil spraying device for oil casing coupling threads, which has the technical advantages of high oiling efficiency, uniform oiling, no need for frequent replacement of accessories, and precise pneumatic control.

[0006] The utility model mainly adopts the following technical solutions:

[0007] An automatic thread oil spraying device for oil casing coupling threads, comprising an oiling head and a thread oil tank, the thread oil tank supplies thread oil to the oiling head, and also comprises a mounting seat and a lifting mechanism, the lifting mechanism drives the oiling head to move up and down relative to the mounting seat, the oiling head comprises an oiling column, a sieve-like core barrel and a rotary drive motor, the circumferential side wall of the sieve-like core barrel is provided with sieve holes, the thread oil tank squeezes the thread oil into the sieve-like core barrel located below the oiling column through the oil passage cavity in the oiling column, when the ferrule box buckle needs to be oiled, the sieve-like core barrel is driven by the lifting mechanism to extend from the through hole opened in the mounting seat and rotates under the drive of the rotary drive motor, thereby throwing the thread oil onto the surface of the ferrule box buckle.

[0008] Wherein, the lifting mechanism adopts a double-acting single-piston rod hydraulic cylinder, the cylinder barrel of the double-acting single-piston rod hydraulic cylinder is fixed on the mounting seat, and the piston rod of the double-acting single-piston rod hydraulic cylinder is connected to the oiling head through a connecting rod.

[0009] The cylinder barrels are arranged as two parallel cylinder barrels, the bottom ends of the two cylinder barrels are connected via a connecting base, the connecting base is fixed on the mounting base, and a pressure oil regulating valve is arranged in the connecting base.

[0010] Wherein, the threaded oil tank is connected with the oiling column through an oil supply passage.

[0011] Wherein, the thread oil tank is also fixedly connected to the oiling head through a clamping arm.

[0012] It also includes a pneumatic valve, which controls the supply of external compressed air to the thread oil tank and the double-acting single-piston rod hydraulic cylinder.

[0013] Wherein, it also includes a limiting hoop, the top end of which is inserted into the bottom end surface of the mounting seat.

[0014] Wherein, a pallet is also included, and the limiting hoop is placed on the pallet.

[0015] Wherein, it also includes a bracket, and the mounting seat and the tray are rotatably connected to the bracket through supporting arms respectively.

[0016] According to the technical scheme described in the utility model, the following beneficial effects are achieved: thread oil is applied to the surface of the ferrule box by the high-speed rotation of the sieve-shaped core barrel, which is more efficient and avoids frequent replacement of accessories; the two parallel cylinder barrels of the double-acting single-piston rod hydraulic cylinder are connected by a connecting base, and the lifting and lowering amplitude of the piston rod can be regulated by a pressure oil regulating valve arranged in the connecting base; the setting of the clamping arm enables the thread oil tank to move up and down together with the oiling head, which is more flexible; the limit hoop can limit the ferrule, ensuring that the oiling operation is more stable and the oiling is more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the automatic oiling device for inserting a compressed air delivery pipe in this application.

[0018] Figure 2 for Figure 1 Schematic diagram of the structure of the automatic oiling device after the compressed air delivery pipe is not inserted and the limit hoop is removed.

[0019] 1 oiling head, 11 oiling column, 12 sieve core barrel, 13 rotary drive motor, 2 threaded oil tank, 3 mounting seat, 4 double-acting single piston rod hydraulic cylinder, 41 cylinder barrel, 42 piston rod, 43 connecting base, 5 connecting rod, 6 pressure oil regulating valve, 7 oil supply channel, 8 clamping arm, M limit hoop, N tray, Y bracket, L support arm. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings:

[0021] See also Figure 1-2As shown, an automatic thread oil spraying device for oil casing coupling thread includes an oiling head 1 and a thread oil tank 2, the thread oil tank 2 supplies thread oil to the oiling head 1, and also includes a mounting seat 3 and a lifting mechanism, the lifting mechanism drives the oiling head 1 to move up and down relative to the mounting seat 3, the oiling head 1 includes an oiling column 11, a sieve-like core barrel 12 and a rotary drive motor 13, the sieve-like core barrel 12 has sieve holes on the circumferential side wall, the thread oil tank 2 squeezes the thread oil into the sieve-like core barrel 12 located below the oiling column 11 through the oil passage cavity in the oiling column 11, when the ferrule buckle needs to be oiled, the sieve-like core barrel 12 is driven by the lifting mechanism to extend from the through hole opened in the mounting seat 3 and rotates under the drive of the rotary drive motor 13, so as to throw the thread oil onto the surface of the ferrule buckle. Preferably, the rotary drive motor 13 adopts a pneumatic motor, and the pneumatic motor is externally connected to compressed air to provide power for the pneumatic motor. In the present application, a sieve-like core barrel is used to rotate at high speed to apply thread oil to the surface of the ferrule box, which is more efficient and can avoid frequent replacement of accessories for oiling, thereby reducing maintenance costs.

[0022] See also Figure 1 , 2 As shown, the lifting mechanism adopts a double-acting single-piston rod hydraulic cylinder 4, a cylinder barrel 41 of the double-acting single-piston rod hydraulic cylinder 4 is fixed on the mounting seat 3, and a piston rod 42 of the double-acting single-piston rod hydraulic cylinder 4 is connected to the oiling head 1 through a connecting rod 5. Preferably, the connecting rod 5 is Z-shaped or 7-shaped, one end of the connecting rod 5 is connected to the piston rod 42 through a ring sleeve, and the other end is also connected to the oiling column 11 through a ring sleeve.

[0023] See also Figure 1 , 2 As shown, the cylinder barrels 41 are arranged in two parallel phases, and the bottom ends of the two cylinder barrels 41 are connected by a connecting base 43, which is fixed on the mounting base 3, and a pressure oil regulating valve 6 is arranged in the connecting base 43. In the present application, the two parallel cylinder barrels of the double-acting single-piston rod hydraulic cylinder are connected by a connecting base, and the amount of pressure oil entering the two cylinder barrels can be regulated by the pressure oil regulating valve arranged in the connecting base, thereby controlling the lifting range of the piston rod.

[0024] See also Figure 1 , 2 As shown, the thread oil tank 2 is connected to the oiling column 11 through the oil supply channel 7.

[0025] See also Figure 1 , 2 As shown, the thread oil tank 2 is also fixedly connected to the oiling head 1 through the clamping arm 8. In the present application, the arrangement of the clamping arm enables the thread oil tank to be lifted and moved together with the oiling head, which is more flexible and easier to operate.

[0026] See also Figure 1 , 2As shown, it also includes a pneumatic valve 9, which controls the supply of external compressed air to the thread oil tank 2 and the double-acting single-piston rod hydraulic cylinder 4. Preferably, the thread oil tank 2 is also provided with a pressure gauge to monitor the pressure value in the thread oil tank 2.

[0027] See also Figure 1 , 2 As shown, it also includes a limiting hoop M, the top end of which is inserted into the bottom end surface of the mounting seat 3. Preferably, the limiting hoop M is formed by two semi-annular structures that are relatively close to each other. When the sleeve collar buckle needs to be oiled, the two semi-annular structures are opened and the sleeve collar is installed in the limiting hoop. Preferably, the two semi-annular structures are joined by a hinge and a buckle.

[0028] See also Figure 1 , 2 As shown, a pallet N is also included, and a limiting hoop M is placed on the pallet N. When the oiling operation is not required, the limiting hoop is placed on the pallet N to support the mounting seat.

[0029] See also Figure 1 , 2 As shown, it also includes a bracket Y, and the mounting seat 3 and the tray N are rotatably connected to the bracket Y through the support arm L. In actual application, the mounting seat and the tray can be staggered with each other in the axial direction, so that when the oiling operation is performed later, the tray is removed to allow the hoop to penetrate into the limit hoop.

[0030] Although the specific implementation modes of the present invention have been described above, those skilled in the art may modify the present invention without departing from the spirit and principle of the present invention. The protection scope of the present invention is defined by the claims and their equivalents.

Claims

1. An automatic thread oil spraying device for oil casing coupling threads, comprising an oiling head and a thread oil tank, wherein the thread oil tank supplies thread oil to the oiling head, and is characterized in that: It also includes a mounting seat and a lifting mechanism, the lifting mechanism drives the oiling head to move up and down relative to the mounting seat, the oiling head includes an oiling column, a sieve-like core barrel and a rotary drive motor, the circumferential side wall of the sieve-like core barrel is provided with sieve holes, the thread oil tank squeezes the thread oil into the sieve-like core barrel below the oiling column through the oil passage cavity in the oiling column, and when the ferrule box buckle needs to be oiled, the sieve-like core barrel is driven by the lifting mechanism to extend from the through hole opened in the mounting seat and rotates under the drive of the rotary drive motor, thereby throwing the thread oil onto the surface of the ferrule box buckle.

2. The automatic thread oil spraying device for oil casing coupling thread according to claim 1 is characterized in that: The lifting mechanism adopts a double-acting single-piston-rod hydraulic cylinder, the cylinder barrel of which is fixed on the mounting seat, and the piston rod of which is connected to the oiling head via a connecting rod.

3. The automatic thread oil spraying device for oil casing coupling thread according to claim 2 is characterized in that: The cylinder barrels are arranged as two parallel cylinder barrels, the bottom ends of the two cylinder barrels are connected via a connecting base, the connecting base is fixed on the mounting base, and a pressure oil regulating valve is arranged in the connecting base.

4. The automatic thread oil spraying device for oil casing coupling threads according to any one of claims 1 to 3, characterized in that: The thread oil tank is connected with the oiling column through an oil supply passage.

5. The automatic thread oil spraying device for oil casing coupling thread according to claim 4 is characterized in that: The thread oil tank is also fixedly connected to the oiling head via a clamping arm.

6. The automatic thread oil spraying device for oil casing coupling thread according to claim 2 or 3, characterized in that: It also includes a pneumatic valve, which controls the supply of external compressed air to the thread oil tank and the double-acting single-piston rod hydraulic cylinder.

7. The automatic thread oil spraying device for oil casing coupling threads according to any one of claims 1 to 3 and 5, characterized in that: It also includes a limiting hoop, the top end of which is inserted into the bottom end surface of the mounting seat.

8. The automatic thread oil spraying device for oil casing coupling thread according to claim 7 is characterized in that: Also included is a tray, on which the limiting hoop is placed.

9. The automatic thread oil spraying device for oil casing coupling thread according to claim 8 is characterized in that: It also includes a bracket, and the mounting seat and the tray are rotatably connected to the bracket through supporting arms respectively.

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