Shielding device

Abstract

The shielding device provided by the embodiment of the utility model comprises a shielding part 51, a fixing part 52 and a lock catch 54, the fixing part 52 and the shielding part 51 are integrally arranged; and one end of the lock catch 54 is fixedly connected with the fixing part 52. And the fixed part is sleeved and fixed on the drill collar to be tested and is locked on the drill collar to be tested through a lock catch 54. When the drill collar is taken back to the ground from the underground to be tested, the shielding device fixed on the drill collar to be tested receives the slurry, so that the slurry is prevented from being scattered to the signal transfer box in the rotating process of the drill collar, the test is prevented from being influenced, and the test accuracy is ensured.

Description

Technical Field

[0001] This utility model relates to the field of drilling engineering technology in petroleum, coal mining and geological exploration, and in particular to a shielding device. Background Technology

[0002] Currently, in the field of logging-while-drilling (LMD) technology for oil drilling, the formation location of the drilling instrument can be determined by measuring the formation gamma value in real time. Natural gamma ray logging instruments can only measure the formation gamma value around the drilling instrument, while azimuth gamma ray logging devices can identify the formation gamma value at a specific azimuth of the drilling instrument. By uploading the azimuth gamma parameters to the surface in real time, it is possible to quickly and accurately determine whether the drilling instrument is hitting the target formation, thus timely and accurately grasping formation information. This allows engineers to understand wellbore trajectory and formation information changes in a timely manner, enabling better formation evaluation, which is of great significance in horizontal drilling.

[0003] In recent years, with the continuous increase in directional and horizontal wells, logging-while-drilling (LOD) technology has developed rapidly. Azimuth logging while drilling (AWWD) is a mandatory test item in LWD. To ensure that the AWWD azimuth logging device functions normally under actual working conditions, it is necessary to conduct functional or performance tests and verifications on the device before it is put into actual use.

[0004] The azimuth gamma measurement system mainly consists of two subsystems: a downhole measurement system and a surface signal and information processing system. The downhole measurement system performs conventional natural gamma and azimuth gamma measurements on the formation downhole, modulating the measurement data into mud signals. These mud pulse signals are then transmitted to the surface via the mud channel by a downhole pulser. The surface signal processing system filters and denoises the received mud signals and decodes them to obtain the measurement data. The azimuth gamma downhole measurement system mainly consists of key components such as the azimuth gamma measurement probe, a dedicated power supply battery, a directional probe, a probe power supply battery, a driver, and a signal pulse generator. The azimuth gamma probe transmits the measurement data to the upper directional probe. The directional probe encodes the received data, converting it into a pulse signal sequence, which then drives the pulse generator to send pulse signals to the surface through the mud channel. These components are all installed and fixed inside the drill collar. To ensure that the data collected by each component inside the drill collar can be accurately transmitted to the surface, the transmission performance of the signal transmission channel inside the drill collar needs to be verified.

[0005] When drill collars are working downhole, they are in a mud environment. When drill collars are retrieved from downhole and placed on the surface for testing, mud will still be present. When the drill collars are tested, they are rotating and mud will spill out. Utility Model Content

[0006] To prevent drilling mud from splashing onto the signal transfer box during drill collar rotation and thus affecting testing, this invention provides a shielding device. The specific technical solution is as follows:

[0007] The present invention provides a shielding device, including a shielding part 51, a fixing part 52 and a latch 54; the fixing part 52 is integrally disposed with the shielding part 51; one end of the latch 54 is fixedly connected to the fixing part 52.

[0008] Furthermore, it also includes: anti-slip protrusion 53, which is disposed on the surface of the fixing part 52 that contacts the drill collar being tested.

[0009] Furthermore, there are multiple anti-slip protrusions 53.

[0010] Furthermore, the fixing part 52 is circular.

[0011] Furthermore, the shielding portion 51 is fan-shaped.

[0012] Furthermore, the fan-shaped surface of the shielding part 51 is provided with multiple protrusions.

[0013] This utility model embodiment provides a shielding device, including a shielding part 51, a fixing part 52, and a locking buckle 54; the fixing part 52 is integrally formed with the shielding part 51; one end of the locking buckle 54 is fixedly connected to the fixing part 52. The fixing part is sleeved and fixed on the drill collar under test, and locked on the drill collar under test by the locking buckle 54. When the drill collar is lowered from downhole to the surface for testing, the shielding device fixed on the drill collar under test catches the mud, preventing the mud from spilling onto the signal transfer box during the rotation of the drill collar, thus affecting the test.

[0014] Furthermore, an anti-slip protrusion 53 is provided on the side of the fixing part 52 that contacts the drill collar under test. The anti-slip protrusion 53 is used to increase the friction between the drill collar under test and the protective umbrella, ensuring that the protective umbrella does not easily slip off the drill collar under test. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the protective umbrella structure of a downhole drill collar data acquisition and transmission testing system provided in this embodiment of the utility model;

[0016] 5-Protective umbrella; 51-Shielding part; 52-Fixing part; 53-Anti-slip protrusion; 54-Lock. Detailed Implementation

[0017] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] This utility model provides a shielding device, including a shielding part 51, a fixing part 52, and a locking buckle 54; the fixing part 52 is integrally formed with the shielding part 51; one end of the locking buckle 54 is fixedly connected to the fixing part 52. The fixing part is sleeved and fixed on the drill collar under test, and locked onto the drill collar by the locking buckle 54. When the drill collar is lowered from downhole to the surface for testing, the shielding device fixed on the drill collar catches the drilling mud, preventing the mud from spilling onto the signal transfer box during the rotation of the drill collar and thus affecting the testing.

[0019] Furthermore, it also includes: anti-slip protrusions 53, which are disposed on the surface of the fixing part 52 that contacts the drill collar under test. There are multiple anti-slip protrusions 53. The fixing part 52 is circular. The shielding part 51 is fan-shaped. Multiple protrusions are provided on the fan-shaped surface of the shielding part 51. The anti-slip protrusions 53, disposed on the surface of the fixing part 52 that contacts the drill collar under test, increase the friction between the drill collar under test and the protective umbrella, ensuring that the protective umbrella does not easily slip off the drill collar under test.

[0020] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A screening device, characterized in that It includes a shielding part (51), a fixing part (52) and a latch (54); the fixing part (52) is integrally provided with the shielding part (51); one end of the latch (54) is fixedly connected to the fixing part (52).

2. A screening device according to claim 1, characterized in that Also includes: Anti-slip protrusion (53) is provided on the side of the fixing part (52) that contacts the drill collar being tested.

3. The screening device of claim 2, wherein, The anti-slip protrusions (53) are multiple.

4. The occlusion device according to claim 1, wherein, The fixing part (52) is circular.

5. The screening device of claim 1, wherein, The shielding part (51) is fan-shaped.

6. The occlusion device according to claim 1, wherein, The shielding part (51) has multiple protrusions on its fan-shaped surface.

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