Perforation device with perforation direction capable of being rotationally adjusted

Abstract

The perforating device with the perforating direction capable of being rotationally adjusted comprises a gun body used for being connected with perforating bullets, the gun body comprises a plurality of series modules, and each series module comprises a fixed connector and a rotary connector; the perforating direction of the perforating bullet can be adjusted by controlling the motor of the rotary connector to drive the sleeve to rotate, so that the perforating bullet perforates towards an area with rich cracks, and the oil and gas extraction efficiency can be improved. And the distance between the perforating bullets can be adjusted through the adjusting rod of the gun body, so that the distance between the perforating bullets can be increased through the connecting rod at non-target layers such as non-oil and gas reservoirs or low-oil and gas reservoirs, and waste of the perforating bullets is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of downhole perforation, and in particular to a perforation device. Background Art

[0002] With the development of shale gas extraction and hydraulic fracturing technology, oil and gas resource development has gradually transformed to complex wells, horizontal wells, and multi-stage fracturing wells. Hydraulic fracturing technology injects high-pressure liquid into the formation to cause the rock formation to break and form a fracture network, thereby improving the fluidity of oil and gas. In the process of oil and gas well development, the perforating gun is a key equipment used for perforating the well wall, and its performance directly affects the connectivity between the reservoir and the wellbore. However, the structural design of traditional perforating guns has significant shortcomings: the perforating bullets are usually arranged in a fixed distribution and cannot be flexibly adjusted according to reservoir conditions and wellbore requirements. This design leads to two major problems:

[0003] First, it is a waste of resources. When the reservoir is thin or discontinuous, a large number of perforating bullets may be shot into non-target layers and fail to play a practical role.

[0004] Second, it lacks adaptability. The fixed perforation direction and angle limit the ability to optimize and transform complex geological conditions (such as fractured reservoirs or horizontal wells). Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a perforating device with rotatable adjustable perforating direction to solve the structural defects of the existing perforating guns: the perforating bullets cannot be adjusted along the axial direction of the wellbore according to the reservoir conditions and the perforating direction of the perforating bullets cannot be adjusted along the circumferential direction of the wellbore according to the fracture conditions.

[0006] The perforating device with rotatable perforating direction of the present invention comprises a gun body for connecting a perforating bullet, the gun body comprises a plurality of serial modules, and the serial modules comprise a fixed connector and a rotating connector;

[0007] The fixed connector comprises a lower connecting sleeve and an upper connecting sleeve connected to the lower connecting sleeve through an axial connecting piece, and the lower connecting sleeve and the upper connecting sleeve are respectively provided with an internal thread interface and an external thread joint;

[0008] The rotary connector includes a sleeve, on which a radial interface for connecting a perforating bullet is provided, and the upper connecting sleeve and the lower connecting sleeve are respectively provided with stoppers rotatably connected to the upper end and the lower end of the sleeve; the rotary connector also includes a driven gear arranged on the outer surface of the sleeve, a motor and a motor controller arranged on the fixed connector, and a driving gear arranged on the motor shaft and matched with the driven gear.

[0009] Furthermore, the gun body also includes an adjusting rod for adjusting the axial spacing of the perforating bullets, and both ends of the adjusting rod are respectively provided with an internal thread interface and an external thread joint for connecting with the upper connecting sleeve and the lower connecting sleeve.

[0010] Furthermore, the axial connecting member includes a vertical rod with a lower end fixed on the lower connecting sleeve and a support ear fixed on the edge of the upper connecting sleeve, and the ear hole on the support ear is fixedly inserted into the upper end of the vertical rod.

[0011] Furthermore, the perforating device with rotatable and adjustable perforating direction also includes a detonating cord, which is passed through the casing.

[0012] Furthermore, the perforating device with rotatable and adjustable perforating direction further comprises a perforating bullet, and the perforating bullet is connected to a radial interface on the casing through a thread.

[0013] Furthermore, the perforating device with rotatable and adjustable perforating direction also includes an angle sensor for detecting the rotation angle of the motor shaft.

[0014] Beneficial effects of the present invention:

[0015] 1. The perforating device with rotatable adjustable perforating direction of the present invention can adjust the perforating direction of the perforating bullet by controlling the motor to drive the casing to rotate, so that the perforating bullet can perforate toward the area rich in fractures, thereby facilitating improving the oil and gas extraction efficiency.

[0016] 2. The perforating device of the present invention can adjust the spacing of the perforating bullets by adjusting the rod. In this way, the spacing of the perforating bullets can be increased by using the connecting rod in non-target layers such as non-oil and gas reservoirs or low-oil and gas reservoirs, so as to reduce the waste of perforating bullets and avoid damage to non-target layers.

[0017] 3. The perforating device with rotatable and adjustable perforating direction of the present invention has a gun body structure composed of serially connected modules, so that the gun body can be easily assembled according to actual geological conditions, and has good versatility and strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of a perforating device with rotatable and adjustable perforating direction.

[0019] Figure 2 It is a three-dimensional structural schematic diagram of a fixed connector.

[0020] Figure 3 It is a three-dimensional structural diagram of a rotary connector. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] As shown in the figure, the perforating device with rotatable adjustable perforating direction in this embodiment includes a gun body for connecting a perforating bullet, and the gun body includes a plurality of serial modules, and the serial modules include a fixed connector and a rotating connector.

[0023] The fixed connector includes a lower connecting sleeve 1 and an upper connecting sleeve 2 connected to the lower connecting sleeve through an axial connecting piece, and the lower connecting sleeve and the upper connecting sleeve are respectively provided with an internal thread interface 3 and an external thread joint 4. In this embodiment, the axial connecting piece includes a vertical rod 5 whose lower end is fixed to the lower connecting sleeve and a support ear 6 fixed to the edge of the upper connecting sleeve, and the ear hole on the support ear is fixedly inserted into the upper end of the vertical rod.

[0024] The rotary connector includes a casing 7, on which a radial interface 8 for connecting a perforating bullet is provided, and the upper and lower connecting sleeves are provided with stoppers 9 rotatably connected to the upper and lower ends of the casing respectively; the rotary connector also includes a driven gear 10 provided on the outer surface of the casing, a motor 11 and a motor controller 12 provided on the fixed connector, and a driving gear 13 provided on the motor shaft and matched with the driven gear. The motor controller 12 can be connected to the ground control device by wired or wireless communication.

[0025] The perforating device with rotatable and adjustable perforating direction in this embodiment further comprises a detonating cord 14 which is passed through the casing.

[0026] The perforating device with rotatable perforating direction in this embodiment further comprises a perforating bullet 15, which is connected to the radial interface on the casing by threading. Of course, the perforating bullet and the radial interface can also be connected by plugging.

[0027] As an improvement to the above embodiment, the gun body further comprises an adjusting rod 16 for adjusting the axial spacing of the perforating bullets, and both ends of the adjusting rod are respectively provided with an internal thread interface and an external thread joint for connecting with the upper connecting sleeve and the lower connecting sleeve.

[0028] In a specific implementation, the axial position of the target oil and gas reservoir in the wellbore can be understood through geological exploration, and the axial position of the target reservoir can be reasonably designed or the adjusting rod 16 of appropriate length can be selected to adjust the axial spacing of the perforating bullets, so that the perforating bullets can avoid non-target reservoirs, which is helpful to reduce the waste of perforating bullets.

[0029] At the same time, the fracture conditions in the target reservoir can be obtained through geological exploration. In this way, the perforating direction of the perforating bullet can be adjusted by controlling the motor to drive the casing to rotate, so that the perforating bullet can perforate towards the area rich in fractures, which is beneficial to improve the efficiency of oil and gas extraction.

[0030] As an improvement to the above embodiment, the perforating device with rotatable adjustable perforating direction further includes an angle sensor 17 for detecting the rotation angle of the motor shaft, and the angle sensor 17 is connected to the motor controller 12. The rotation angle of the motor shaft is measured by the angle sensor 17, and the rotation angle of the large perforating bullet can be converted by combining the transmission ratio of the driven gear and the driving gear, so that it can be accurately known whether the perforating bullet is rotated in place, which is conducive to timely detection of fault problems.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A perforating device with rotatable and adjustable perforating direction, characterized in that: It includes a gun body for connecting a perforating bullet, the gun body includes a plurality of serial modules, and the serial modules include a fixed connector and a rotating connector; The fixed connector comprises a lower connecting sleeve and an upper connecting sleeve connected to the lower connecting sleeve through an axial connecting piece, and the lower connecting sleeve and the upper connecting sleeve are respectively provided with an internal thread interface and an external thread joint; The rotary connector includes a sleeve, on which a radial interface for connecting a perforating bullet is provided, and the upper connecting sleeve and the lower connecting sleeve are respectively provided with stoppers rotatably connected to the upper end and the lower end of the sleeve; the rotary connector also includes a driven gear arranged on the outer surface of the sleeve, a motor and a motor controller arranged on the fixed connector, and a driving gear arranged on the motor shaft and matched with the driven gear.

2. The perforating device with rotatable perforating direction according to claim 1 is characterized in that: The gun body also includes an adjusting rod for adjusting the axial spacing of the perforating bullets, and the two ends of the adjusting rod are respectively provided with an internal thread interface and an external thread joint for connecting with the upper connecting sleeve and the lower connecting sleeve.

3. The perforating device with rotatable and adjustable perforating direction according to claim 1, characterized in that: The axial connecting piece comprises a vertical rod with a lower end fixed on the lower connecting sleeve and a support ear fixed on the edge of the upper connecting sleeve, and the ear hole on the support ear is fixedly sleeved on the upper end of the vertical rod.

4. The perforating device with rotatable and adjustable perforating direction according to claim 1, characterized in that: Also included is a detonating cord which is threaded into the casing.

5. The perforating device with rotatable and adjustable perforating direction according to claim 1, characterized in that: It also includes a perforating bullet, which is connected to a radial interface on the casing through threads.

6. The perforating device with rotatable and adjustable perforating direction according to claim 1, characterized in that: An angle sensor for detecting the rotation angle of the motor shaft is also included.

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