Azimuth gamma calibration device
By designing an azimuth gamma calibration device that includes components such as an up converter, lifting ring, and aviation plug, the problem that existing devices cannot be dynamically calibrated in a saline environment has been solved. This enables calibration in a saline environment and simulation of downhole construction conditions, reducing costs and simplifying operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-29
- Publication Date
- 2026-03-10
AI Technical Summary
Existing drill collar-type azimuth gamma calibration devices are mainly used for static testing when placed horizontally, and cannot be used for dynamic calibration in a saline environment, thus failing to simulate downhole construction conditions.
An azimuth gamma calibration device was designed, comprising components such as an upper converter head, lifting ring, aviation plug, lower protective head, and sealing ring. It can perform calibration in both saltwater and air environments and achieve real-time power supply and communication via the aviation plug, simulating downhole construction conditions.
It enables azimuth gamma calibration in a saline environment, reducing costs and simplifying operation. It can also perform rotational testing in a vertical state to simulate downhole construction conditions.
Smart Images
Figure CN223984467U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of downhole testing instruments for oil drilling, and in particular to an azimuth gamma calibration device. Background Technology
[0002] Currently, in horizontal well drilling, when the drill string emerges from the reservoir, azimuth gamma ray readings are used to determine whether the drill bit is penetrating the upper or lower reservoir layers, ensuring that the drill bit always travels along the sandstone formation. Azimuth gamma rays must be calibrated periodically before downhole operations to ensure that the measured values are within the error range. This requires specialized calibration equipment to ensure that the azimuth gamma ray is calibrated in brine. Currently, calibration devices for drill collar-type azimuth gamma rays are generally horizontally placed and perform rotational or static tests on the ground; there are currently no calibration devices that can be tested in brine. Utility Model Content
[0003] (a) Technical problems to be solved
[0004] To address the shortcomings of existing technologies, this invention provides an azimuth gamma calibration device. The developed azimuth gamma calibration device enables dynamic calibration of azimuth gamma in a saline environment.
[0005] (II) Technical Solution
[0006] To solve the above problems, this utility model provides an azimuth gamma calibration device, comprising:
[0007] An upper adapter is used for connection, and an azimuth gamma module is connected to the lower part of the upper adapter. A lifting ring is connected to the upper end of the upper adapter, and an aviation plug is connected to the upper end face. A lower protective head, a lower plug, and a sealing ring are connected to the lower end of the azimuth gamma module.
[0008] Preferably, the lifting ring has an NC46 thread at the front end, a hollowed-out annular shape at the rear end, and a hollow structure in the middle.
[0009] Preferably, the aviation plug uses two matching male and female aviation plugs, and the plugs can be single-core or more.
[0010] Preferably, the left end thread of the adapter is an NC46 female thread, and the right end thread is an NC46 male thread. There is a base for the aviation plug on the left end face, and a horizontal hole is opened to the right. There is an annular groove for matching conductive ring at the shoulder of the male thread on the right end, and a φ5mm horizontal hole is opened to the left, which communicates with the hole on the left end.
[0011] Preferably, the left end thread of the lower plug is M50X2 and matches the lower connector, and the middle end face is milled with an annular groove for placing a sealing ring to seal the end face between the lower plug and the lower protective head.
[0012] Preferably, the lower protective head drill collar structure has an NC46 female thread on the left end and an M50X2 thread on the right end. It has four vertical holes on its surface for quick installation and disassembly, and a through hole in the middle to facilitate the passage of salt water. It can be calibrated in both salt water and air environments.
[0013] (III) Beneficial Effects
[0014] The azimuth gamma calibration device described in this invention enables azimuth gamma calibration in a saline environment. The device features an aviation connector at the top, allowing for real-time power supply and communication with the azimuth gamma during calibration, eliminating the need for batteries and reducing calibration costs. A sealed head at the bottom allows for calibration in both saline and non-saline environments, simplifying operation. The lifting ring structure at the top allows for vertical rotation testing of the azimuth gamma, simulating downhole drilling conditions. Attached Figure Description
[0015] Figure 1 This is a structural cross-sectional view of the orientation gamma calibration device of this utility model;
[0016] Figure 2 This is a structural diagram of the directional gamma calibration device of this utility model.
[0017] Among them, 1. Lifting ring; 2. Aviation plug; 3. Upper adapter; 4. Elliptical ring; 5. Lower protective head; 6. Lower plug; 7. Sealing ring; 8. Azimuth gamma module. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] In the description of this utility model, it is necessary to understand that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", "top", and "bottom" are based on the orientation or positional relationship shown in the accompanying drawings. The purpose is only to facilitate the description of this utility model and simplify the description, and is not intended to indicate or imply that the component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.
[0020] like Figure 1-2As shown, this utility model provides an azimuth gamma calibration device, specifically including: an upper converter 3, which serves as a connector, and an azimuth gamma module 8 is connected to the lower part of the upper converter 3; a lifting ring 1 is connected to the upper end of the upper converter 3, and an aviation plug 2 is connected to the upper end face; the lower end of the azimuth gamma module 8 is connected to a lower protective head 5, a lower plug 6, and a sealing ring 7.
[0021] It should be noted that the lower plug 6 and the lower protective head 5 are connected by threads, and the intermediate sealing ring 7 plays a sealing role after being compressed.
[0022] In this utility model, the left end thread of the adapter 3 is an NC46 female thread, and the right end thread is an NC46 male thread. There is a base for the aviation plug on the left end face, and a horizontal hole is opened to the right. There is an annular groove for matching the conductive ring at the shoulder of the male thread on the right end, and a φ5mm horizontal hole is opened to the left to communicate with the hole on the left end, so as to realize the connection of the wires in the adapter.
[0023] In this utility model, the front end of the lifting ring 1 has an NC46 thread, the rear end is hollowed out into a ring shape, and the middle is a hollow structure. Its function is to allow the crane above to lift the entire device during calibration operations.
[0024] In this invention, the aviation plug 2 can be quickly connected and disconnected through two matching male and female aviation plugs, and the plug can be single-core or higher.
[0025] In this utility model, the left end thread of the lower plug 6 is M50X2 and matches the lower connector. The middle end face is milled with an annular groove for placing a sealing ring to seal the end face between the lower plug and the lower protective head.
[0026] In this utility model, the lower protective head (5) has a drill collar structure. Its left end thread is NC46 female thread, and its right end thread is M50X2. It has four vertical holes on its surface for quick installation and disassembly. It has a through hole in the middle to facilitate the passage of salt water. It can be calibrated in both salt water and air environments.
[0027] During assembly, first place the upper adapter (3) on the operating table, install the conductive ring into the annular groove on the male thread on the right end using a tool, pass the bus through the small horizontal hole (302), extend it to the left from the left side of the large horizontal hole (301), then connect the wire at the right end of the aviation plug (2) to this bus, put on the heat shrink tubing, and then retract it back into the large horizontal hole (301), and fix the aviation plug (2) to the left end face of the upper adapter (3) with four bolts. Then connect the male thread at the right end of the lifting ring (1) to the female thread of the upper adapter (3). First place the azimuth gamma module (8) on the disassembly and assembly frame, clamp the drill collar at the left end, and connect the connected lifting ring (1), aviation plug (2), upper adapter (3) to the female thread of the azimuth gamma module (8).
[0028] Place the sealing ring (7) into the sealing groove of the lower plug (6), apply grease, then connect the male thread of the lower plug (6) and the female thread at the right end of the lower protective head (5) together, then place the elliptical ring (4) into the sealing groove on the left end face of the lower protective head (5), apply grease, then connect this short circuit to the male thread of the azimuth gamma module (8), tighten the threads between each part with chain clamps, and the installation operation is completed.
[0029] First, assemble the entire device according to the drawings. Use a sling to hold the lifting ring (1) and use a crane to hold the other end of the sling. Lift the entire tool string and connect the matching aviation plug and aviation plug (2). After the power-on test is passed, lower it from the top of the calibration well. The upper limit is 20 cm from the left end of the upper converter head (3). At this time, the azimuth gamma module flow channel (802) is in the air. After calibration in this mode, lift the entire tool string out, remove the lower plug (6), and then lower it into the calibration well. At this time, the azimuth gamma module flow channel (802) is in the brine. Continue calibration in this mode.
[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An azimuthal gamma calibration device, characterized in that, The utility model relates to a kind of gamma ray logging tool, including: The upper conversion head (3) is connected, and upper conversion head (3) is connected azimuth gamma module (8) below;The upper end of the upper conversion head (3) is connected with the ring (1), and the upper end surface is connected with the aviation plug (2);Azimuth gamma module (8) lower end is connected with lower protection head (5), lower plug (6) and sealing ring (7).
2. The azimuthal gamma calibration device of claim 1, wherein, The front end thread of the ring (1) is NC46, the rear end is hollowed out as annular, and the middle is hollow structure.
3. The azimuthal gamma calibration device of claim 1, wherein, The aviation plug (2) can be inserted by two matched aviation plug male and female, and the single core of plug can be above.
4. The azimuthal gamma calibration device of claim 1, wherein, The left end thread of the upper conversion head (3) is NC46 female thread, and the right end thread is NC46 male thread, there is the base of aviation plug on the left end surface, and horizontal hole is opened to right, and ring groove of matching conductive ring is opened at the shoulder of right end male thread, and φ5mm horizontal hole is opened to left and is through with the hole of left end.
5. The azimuthal gamma calibration device of claim 1, wherein, The left end thread of the lower plug (6) is matched with lower connector for M50X2, and annular groove is milled on the middle end surface, for placing sealing ring, sealing the end surface between lower plug and lower protection head.
6. The azimuthal gamma calibration device of claim 1, wherein, The lower protection head (5) is the structure of drill collar, the left end thread is NC46 female thread, and the right end thread is M50X2, four vertical holes are opened on surface, for quick installation and disassembly, through hole is opened in the middle, to facilitate brine passing, and can be calibrated in two environments of brine and air.