CN114687689B - Recyclable bridge plug throwing tool - Google Patents

Abstract

The invention discloses a recyclable bridge plug throwing tool, which mainly comprises an electric cylinder, a main sleeve, a transmission pin, a transmission supporting column, an outer sleeve, a gripper transmission table, a limiting ring shearing pin, a gripper limiting ring, a clamping plate and a throwing half buckle, and is characterized in that: the throwing tool is electrified, and the electric cylinder core shaft rotates to drive the electric cylinder core shaft sleeve, the outer sleeve and the throwing half buckle to synchronously move axially. The grippers are subjected to initial pressure and limited by gripper limiting rings, the recyclable bridge plug bearing neck is gripped, and then the throwing and setting actions are performed. When the bridge plug is completely sealed, the electric cylinder rotates, the outer sleeve moves axially upwards, the clamping plate pushes the gripper limiting ring to complete shearing of the limiting ring shearing pin, the gripper limiting ring moves axially upwards along with the clamping plate, limiting of the gripper is released, the gripper rotates clockwise around the rotating shaft under the action of restoring force of the spring, the recyclable bridge plug is loosened, and the recycling and throwing tool is pulled up at the moment. The invention can realize the throwing and setting actions of the recyclable bridge plug and can be repeatedly used.

Description

A retrievable bridge plug delivery tool

technical field

The invention relates to a production pipe string plugging tool for oil workover operations, in particular to a recoverable bridge plug delivery tool, which belongs to the technical field of downhole operations.

Background technique

The bridge plug was formed in the early 1980s. Because of its few construction procedures, short period and accurate sealing position, it has been widely used in oil and gas well sealing as soon as it came out. Nowadays, with the continuous development of oil and natural gas exploration and development technology, the frequency of use of bridge plugs is also increasing rapidly. Although permanent bridge plugs can meet engineering requirements in terms of function, the cost of use is relatively high; soluble bridge plugs are suitable for different working conditions. The dissolution rate has different requirements, and its general applicability is not great.

For the above-mentioned bridge plug selection problem, the current solution is to use recyclable bridge plugs. This type of bridge plug can not only meet the requirements of the project, but also can be reused, which greatly reduces the cost of oil production. Therefore, inventing a retrievable bridge plug delivery tool is of great significance for improving the efficiency of workover operations and increasing the comprehensive economic benefits of a single well.

Contents of the invention

The purpose of the invention is to realize the launching and setting of the recoverable bridge plug. A retrievable bridge plug delivery tool is provided, through the action of an electric cylinder, the recyclable bridge plug is set and sealed, and after the setting is completed, the delivery tool and the bridge plug are quickly separated.

The technical scheme adopted in the present invention is:

A retrievable bridge plug delivery tool, which consists of a cable joint, a conversion nipple, a main sleeve, an electric cylinder mandrel, an electric cylinder mandrel sleeve, an electric cylinder column, an electric cylinder sleeve, a threaded sleeve, and a transmission support column nut , transmission pin, transmission support column, outer sleeve, transmission column connection platform, gripper transmission platform, gripper spring, spring plug, rotating shaft, gripper, limit ring shear pin, grip limit ring, card plate, electric cylinder positioning screw, half-release button, and cross-through screw. It is characterized in that: the cable joint is composed of the upper joint of the cable joint, the cavity of the cable joint, and the lower joint of the cable joint. Convert the connection of the short section. The inner thread of the conversion nipple is used for the connection between the lower joint of the cable joint and the adapter nipple, and the outer thread of the adapter nipple is used for the connection of the main sleeve and the adapter nipple. The main sleeve is threadedly connected with the threaded sleeve and the outer sleeve. The electric cylinder mandrel sleeve has 2 through holes, and the through hole at the upper end of the electric cylinder mandrel sleeve and the through hole at the lower end of the electric cylinder mandrel sleeve are both used to cooperate with the transmission pin. The threaded sleeve is provided with an external thread of the threaded sleeve and a ring groove, and 4 holes are evenly distributed on the upper and lower ends. The external thread of the threaded sleeve is used for the connection between the threaded sleeve and the main sleeve, and the size of the ring groove is consistent with the axis of the electric cylinder The sleeve size matches, the upper end hole is used to install the positioning screw of the electric cylinder, and the lower end hole is used to install the transmission support column. Both ends of the transmission supporting column are provided with threads, the external thread at the upper end is threaded with the hole at the lower end, and the external thread at the lower end is threaded with the nut of the transmission supporting column. The outer sleeve is circumferentially arranged with 2 through holes and 3 through grooves, and the lower end is provided with an internal thread, the through holes of the outer sleeve cooperate with the transmission pin, and the through grooves of the outer sleeve cooperate with the clamping plate (the outer sleeve and the clamping plate The assembling of plate is as shown in Figure 13), and outer sleeve internal thread is screwed with throwing in half buckle external thread and connects throwing in half buckle. The connecting platform of the transmission column is provided with an external thread and 4 through holes, the external thread of the connecting platform of the transmission column is screwed with the internal thread of the transmission platform of the gripper, and the through hole of the connecting platform of the transmission column is used for installing the transmission supporting column. The gripper transmission platform is provided with internal threads, 3 through holes and 3 through grooves are evenly distributed, and each through groove has a through hole in the groove, and the through holes of the gripper transmission platform are respectively equipped with gripper springs. , the through slots of the grip transmission platform are respectively equipped with grippers, and the grippers are connected with the grip transmission platform through a rotating shaft. The three rotating shafts are respectively inserted into the through holes in the groove to support the gripper and allow it to rotate around the rotating shaft. The upper end of the gripper is provided with a through hole, and the lower end is provided with a pin hole, wherein the through hole of the gripper is used for installing the rotating shaft, and the pin hole of the gripper is used for installing the limit ring shear pin to limit the position of the gripper. There are 3 through holes in the circumferential direction of the grip limit ring, and the shear pins of the limit ring are matched with the through holes of the grip limit ring and the grip pin holes at the same time, and the grip limit ring is fixed on the lower part of the grip to limit the grip. Hand rotation pose. The half-release button is processed with external threads, 2 through holes and a concave platform. The through-hole of the half-release button is used to install the piercing screw, and the two half-release buttons are docked. The purpose of the concave platform is to facilitate the installation workers to operate. .

Compared with the prior art, the beneficial effect of the patented tool of the present invention is that it can safely and effectively release and set the retrievable bridge plug carried by the spring pin.

Description of drawings

Fig. 1 is a structural schematic diagram of a retrievable bridge plug delivery tool;

Fig. 2 is the structural representation of electric cylinder;

Fig. 3 is a structural schematic diagram of a conversion sub;

Fig. 4 is a schematic structural view of the electric cylinder core shaft sleeve;

Fig. 5 is the structural representation of threaded sleeve;

Fig. 6 is a schematic structural diagram of the cooperation between the transmission support column and the transmission column connecting platform;

Fig. 7 is the structural representation of outer sleeve;

Fig. 8 is a schematic structural view of the grip transmission platform;

Fig. 9 is a schematic structural view of the gripper assembly;

Figure 10 is a schematic structural view of the gripper;

Fig. 11 is a schematic structural view of the gripper limit ring;

Fig. 12 is a structural schematic diagram of putting in a half button;

Fig. 13 is a schematic diagram of the assembly of the outer sleeve and the clamping plate;

In the figure: 1. Cable connector, 1a. Cable connector upper connector, 1b. Cable connector cavity, 1c. Cable connector lower connector, 1d. Cable connector external thread, 2. Conversion nipple, 2a. Conversion nipple internal thread, 2b. Conversion nipple external thread, 3. Main sleeve, 4. Electric cylinder mandrel, 5. Electric cylinder mandrel sleeve, 5a. Through hole at the upper end of the electric cylinder mandrel sleeve, 5b. Through hole at the lower end of the electric cylinder mandrel sleeve , 6. Electric cylinder column, 7. Electric cylinder shaft sleeve, 8. Threaded sleeve, 8a. External thread of threaded sleeve, 8b. Upper end hole, 8c. Lower end hole, 8d. Ring groove, 9. Transmission support column nut , 10. Transmission pin, 11. Transmission support column, 11a. Upper external thread, 11b. Lower external thread, 12. Outer sleeve, 12a. Outer sleeve through hole, 12b. Outer sleeve through groove, 12c. Overcoat Cylinder internal thread, 13. Transmission column connection platform, 13a. Transmission column connection platform external thread, 13b. Transmission column connection platform through hole, 14. Gripper transmission platform, 14a. Gripper transmission platform internal thread, 14b. Gripper transmission Table through hole, 14c. Gripper drive table through groove, 14d. Groove through hole, 15. Gripper spring, 16. Spring plug, 17. Rotation shaft, 18. Gripper, 18a. Gripper through hole, 18b .Handle pin hole, 19. Limit ring shear pin, 20. Gripper limit ring, 20a. Gripper limit ring through hole, 21. Clamp plate, 22. Electric cylinder positioning screw, 23. Putting half buckle , 23a. put in the half button external thread, 23b. put in the half button through hole, 23c. put in the half button concave platform, 24. wear the screw.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figures 1-8, a recyclable bridge plug delivery tool consists of a cable joint 1, a conversion nipple 2, a main sleeve 3, an electric cylinder mandrel 4, an electric cylinder mandrel sleeve 5, and an electric cylinder column 6 , electric cylinder bushing 7, threaded sleeve 8, transmission support column nut 9, transmission pin 10, transmission support column 11, outer sleeve 12, transmission column connection platform 13, grip transmission platform 14, grip spring 15, Spring stopper 16, rotating shaft 17, gripper 18, limit ring shear pin 19, grip limit ring 20, clamping plate 21 form. It is characterized in that: the electric cylinder mandrel 4 and the electric cylinder mandrel sleeve 5 are threadedly connected, the feeding tool is powered on, and the electric cylinder mandrel 4 rotates, thereby driving the electric cylinder mandrel sleeve 5 to move axially. Because the transmission pin 10 cooperates with the two through holes of the electric cylinder mandrel sleeve 5 and the through hole 12a of the outer sleeve at the same time, the axial displacement of the electric cylinder mandrel sleeve 5 can be transmitted to the outer sleeve 12 . The electric cylinder mandrel sleeve 5 moves axially, and the outer sleeve 12 and the throwing half button 23 move axially thereupon. In the initial state, the spring stopper 16 squeezes the gripper spring 15, so that the gripper 18 is subjected to the initial pressure given by the gripper spring 15. At this time, under the joint action of the gripper stop ring 20 and the stop ring shear pin 19, The grippers 18 cannot rotate around the rotating shaft 17 and maintain a relatively static posture, so the three grippers 18 firmly grasp the carrying neck of the retrievable bridge plug and perform the throwing action. When the bridge plug arrives at the designated position, the delivery tool is energized, and the half button 23 is thrown into contact with the outer shell of the bridge plug to give the outer shell a downward pressure. At the same time, the gripper 18 grasps the bearing neck and gives the bearing neck an upward pulling force, and the bridge plug is subjected to a pair of reaction forces to realize the setting action. After the setting of the recoverable bridge plug is completed, the electric cylinder rotates, and the transmission pin 10 drives the outer sleeve 12 to move upward and axially. When the clamping plate 21 is pressed against the gripper limiting ring 20, the outer sleeve 12 continues to be stressed. The limit ring shear pin 19 is sheared. The position of the gripper stop ring 20 can determine the rotation angle of the gripper 18 around the rotation axis 17 . The gripper stop ring 20 moves axially upwards along with the clamping plate 21, and the gripper 18 is subjected to the restoring force of the gripper spring 15 and rotates around the rotating shaft 17, so that the retrievable bridge plug can be loosened. Plug delivery tool for lifting recovery.

The specific implementation methods described above are used to illustrate the patent rather than limit the scope of the patent. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the patent belong to the patent system protected range.

Claims (2)

1. A recyclable bridge plug delivery tool, which consists of a cable joint (1), a conversion pup joint (2), a main sleeve (3), an electric cylinder mandrel (4), an electric cylinder mandrel sleeve (5), an electric Cylinder column (6), electric cylinder bushing (7), threaded sleeve (8), transmission support column nut (9), transmission pin (10), transmission support column (11), outer sleeve (12), Transmission column connection platform (13), gripper transmission platform (14), gripper spring (15), spring plug (16), rotating shaft (17), gripper (18), limit ring shear pin (19 ), gripper limit ring (20), clamping plate (21), electric cylinder positioning screw (22), throwing half buckle (23), and piercing screw (24), it is characterized in that: the cable joint (1 ) consists of the upper connector of the cable connector (1a), the cavity of the cable connector (1b), the lower connector of the cable connector (1c), and the external thread of the cable connector (1d) is used for the connection of the cable connector (1) and the conversion nipple (2) ;The internal thread of the conversion nipple (2a) is used for the connection between the lower connector of the cable joint (1c) and the conversion nipple (2), and the external thread of the conversion nipple (2b) is used for the connection between the main sleeve (3) and the conversion nipple (2 ) connection; the main sleeve (3) is threadedly connected with the threaded sleeve (8) and the outer sleeve (12); the electric cylinder mandrel sleeve (5) has 2 through holes, and the electric cylinder mandrel sleeve The upper end through hole (5a) and the lower end through hole (5b) of the electric cylinder mandrel sleeve are used to cooperate with the transmission pin (10); the threaded sleeve (8) is provided with a threaded sleeve external thread (8a) and a ring groove ( 8d), there are 4 holes evenly distributed on the upper and lower ends, the threaded sleeve external thread (8a) is used for the connection between the threaded sleeve (8) and the main sleeve (3), the size of the ring groove (8d) is the same as that of the electric cylinder bushing (7) The dimensions are matched, the upper end hole (8b) is used to install the positioning screw (22) of the electric cylinder, and the lower end hole (8c) is used to install the transmission support column (11); the two ends of the transmission support column (11) are provided with There are threads, the upper external thread (11a) is threadedly connected with the lower end hole (8c), and the lower end external thread (11b) is threadedly connected with the transmission support column nut (9); the outer sleeve (12) has two circumferentially arranged The through hole and 3 through grooves, the lower end is provided with internal threads, the outer sleeve through hole (12a) is matched with the drive pin (10), the outer sleeve through groove (12b) is matched with the clamping plate (21), and the inner sleeve Screw thread (12c) is screwed with throwing in half buckle external thread (23a) and connects throwing in half buckle (23); Described transmission column connecting platform (13) is provided with external thread and 4 through holes, and transmission column connecting platform external thread ( 13a) is screwed with the internal thread (14a) of the gripper transmission platform, and the through hole (13b) of the transmission column connection platform is used to install the transmission support column (11); the said gripper transmission platform (14) is provided with internal threads, uniformly distributed There are 3 through holes and 3 through grooves, and each through groove has a through hole in the groove, the through holes (14b) of the gripper transmission platform are respectively equipped with gripper springs (15), and the through grooves of the gripper transmission platform (14c) are equipped with gripper (18) respectively, and gripper (18) is connected with gripper transmission platform (14) by rotating shaft (17); It plays the role of supporting the gripper (18) and allowing it to rotate around the rotating shaft (17); the upper end of the gripper (18) has a through hole, and the lower end has a pin hole, wherein the gripper through hole (18a) is used For the installation of the rotating shaft (17), the grip pin hole (18b) is used to install the limit ring shear pin (19) to limit the position of the grip (18); the grip limit ring (20) has 3 circumferential openings The through hole, the limit ring shear pin (19) is matched with the through hole (20a) and the pin hole (18b) of the grip limit ring at the same time, and the grip limit ring (20) is fixed on the grip (18) The lower part is to limit the rotation posture of the gripper (18); the half-release button (23) is processed with external threads, 2 through holes and a concave platform, and the through-hole (23b) of the drop-in button is used to install the through-hole screw (24) , butt two put in half buckle (23), the design purpose of throwing in half buckle concave platform (23c) is to be convenient to install worker's operation. 2. A recyclable bridge plug delivery tool as claimed in claim 1, characterized in that: the electric cylinder mandrel (4) and the electric cylinder mandrel sleeve (5) are threadedly connected, when the delivery tool is powered on, 1 The electric cylinder core shaft (4) rotates, thereby driving the axial movement of the electric cylinder core shaft sleeve (5); because the transmission pin (10) communicates with the two through holes and the outer sleeve of the electric cylinder core shaft The holes (12a) cooperate, so the axial displacement of the electric cylinder core shaft sleeve (5) can be transmitted to the outer sleeve (12); the electric cylinder core shaft sleeve (5) moves axially, and the outer sleeve (12) and the delivery The half button (23) moves axially thereupon; in the initial state, the spring stopper (16) squeezes the gripper spring (15), so that the gripper (18) is subjected to the initial pressure given by the gripper spring (15), because the gripper Restricted by the limit ring (20) and the limit ring shear pin (19), the gripper (18) cannot rotate around the rotation axis (17) and maintain a relatively static posture, so the three grippers (18) will The load-carrying neck of the recyclable bridge plug is firmly grasped and released; when the bridge plug reaches the designated position, the launching tool is energized, and the release half button (23) contacts the outer shell of the bridge plug to give downward pressure to the outer shell; at the same time, the gripper (18) Grasp the bearing neck, give the bearing neck an upward pulling force, and the bridge plug receives a pair of reaction forces to realize the setting action; after the recyclable bridge plug is set and sealed, the electric cylinder rotates, and the transmission pin (10) drives the outer sleeve (12) Move upward axially, when the clamping plate (21) is against the gripper stop ring (20), the outer sleeve (12) continues to be stressed, and the distance between the clamping plate (21) and the gripper stopper ring (20) After the contact force reaches a certain limit, the limit ring shear pin (19) on the grip limit ring (20) is sheared; the position of the grip limit ring (20) can determine the grip (18) around the rotation axis (17) Angle of rotation; the grip limit ring (20) moves upward axially with the clamp (21), and the grip (18) rotates around the rotation axis (17) under the restoring force of the grip spring (15) , loosen the retrievable bridge plug, and at this time, the retrievable bridge plug can be put into the tool for lifting and recycling.

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