Azimuth density imaging logging-while-drilling instrument

Abstract

The utility model relates to the technical field of logging instruments, and discloses an orientation density imaging logging-while-drilling instrument which comprises a drill collar, an opening is formed in the rod wall of the drill collar, a sealing cover plate is arranged at the position of the opening, two rotating shafts are symmetrically and fixedly arranged on one side of the sealing cover plate, and drilling grooves connected with the rotating shafts are formed in the two sides of the opening of the drill collar. The rod wall of the drill collar is movably sleeved with a clamping ring, the clamping ring is in clamping fit with the end, away from the rotating shaft, of the sealing cover plate, a sliding groove is formed in the position, located on one side of the clamping ring, of the rod wall of the drill collar, a sliding block is arranged in the sliding groove, and a spring is fixedly arranged between the side wall of the sliding block and the side wall of the sliding groove. A connecting rod is fixedly arranged on the side wall of the sliding block, and the end, away from the sliding block, of the connecting rod is fixedly connected with the side wall of the clamping ring. According to the utility model, the sealing cover plate adopts a rotary structure, so that the sealing cover plate is convenient to rotate, open and maintain elements in the drill collar, the maintenance efficiency of the elements in the drill collar is improved, and the maintenance intensity is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of logging tools, in particular to an azimuth density imaging while-drilling logging tool. Background Technique

[0002] At present, in order to evaluate the formation, the bulk density of the formation rock is measured, and then data are provided for judging lithology, calculating oil saturation, well diameter and other geological and engineering parameters. Therefore, the measurement of formation density has become one of the basic parameters for evaluating the formation.

[0003] Among them, the publication (announcement) number: CN109779620A discloses an azimuth density imaging while-drilling logging tool, which includes a drill collar. The drill collar is successively divided into a density detection section, an ultrasonic well diameter section and an azimuth detection section. Transition cover assemblies are arranged between the density detection section and the ultrasonic well diameter section and between the ultrasonic well diameter section and the azimuth detection section. Detector chamber assemblies are arranged on the density detection section, the ultrasonic well diameter section and the azimuth detection section. Corresponding detectors are respectively arranged in each detector chamber assembly. Adjacent detectors are connected by wires, and the middle of the wires is located between the transition cover assembly between adjacent detector chamber assemblies and the drill collar.

[0004] In the above scheme, the opening on the drill collar is sealed by a sealing cover plate and then installed by sealing screws. However, since the components inside the drill collar are prone to damage, when repairing the components inside the drill collar, it is necessary to disassemble and assemble the sealing screws one by one, resulting in high repair intensity and low repair efficiency. For this reason, an azimuth density imaging while-drilling logging tool is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problems put forward in the background technique, and to propose an azimuth density imaging while-drilling logging tool.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] An azimuth density imaging while-drilling logging tool includes a drill collar. An opening is provided on the rod wall of the drill collar, and a sealing cover plate is provided at the opening. Two rotating shafts are symmetrically and fixedly provided on one side of the sealing cover plate. Drill grooves connected to the rotating shafts are provided on both sides of the opening of the drill collar; A clamping ring is movably sleeved on the rod wall of the drill collar, and the clamping ring is in clamping fit with the end of the sealing cover plate away from the rotating shaft. A sliding groove is provided on the rod wall of the drill collar and on one side of the clamping ring, and a sliding block is arranged inside the sliding groove. A spring is fixedly arranged between the side wall of the sliding block and the side wall of the sliding groove. A connecting rod is fixedly arranged on the side wall of the sliding block, and the end of the connecting rod away from the sliding block is fixedly connected to the side wall of the clamping ring.

[0008] Preferably, a transparent glass is fixedly embedded on the surface of the sealing cover plate.

[0009] Preferably, the sealing cover plate is a trapezoidal plate, and a rubber gasket is arranged in the gap between the sealing cover plate and the opening of the drill collar.

[0010] Preferably, a torsion spring is sleeved on the shaft wall of the rotating shaft, and both ends of the torsion spring are fixedly connected to the sealing cover plate and the drill groove respectively.

[0011] Preferably, the number of the sliders, the number of the springs and the number of the connecting rods are all two, and the sliders, the springs and the connecting rods are symmetrically distributed on both sides of the clamping ring.

[0012] Preferably, the number of the openings on the drill collar is two, and the number of the sealing cover plates is two. The two sealing cover plates are clamped and matched through the same clamping ring.

[0013] Compared with the prior art, the utility model provides an azimuth density imaging logging-while-drilling tool, which has the following beneficial effects:

[0014] 1. For the azimuth density imaging logging-while-drilling tool, through the provided rotating shaft, the sealing cover plate can rotate through the rotating shaft and rotate out from the inside of the opening of the drill collar, so that the components inside the drill collar are convenient to repair. After the repair, the sealing cover plate is rotated and buckled inside the opening of the drill collar, and then an elastic force is applied to the slider by the spring, so that the connecting rod drives the clamping ring to move and the sealing cover plate is clamped through the clamping ring, so that the sealing cover plate can be clamped and installed inside the opening of the drill collar.

[0015] 2. For the azimuth density imaging logging-while-drilling tool, through the torsion spring arranged on the rotating shaft, when the clamping ring is pushed to be separated from the sealing cover plate, the torsion spring can apply an elastic force to the sealing cover plate, so that the sealing cover plate can automatically rotate and pop out through the rotating shaft.

[0016] 3. For the azimuth density imaging logging-while-drilling tool, through the rubber gasket arranged between the sealing cover plate and the opening, after the sealing cover plate is buckled inside the opening, the rubber gasket seals the sealing cover plate and the opening, and the sealing performance between the sealing cover plate and the opening of the drill collar is increased.

[0017] The parts not involved in the device are the same as the prior art or can be realized by adopting the prior art. The utility model adopts a rotary structure for the sealing cover plate, so that the sealing cover plate is convenient to rotate and open to repair the components inside the drill collar, the repair efficiency of the components inside the drill collar is improved, and the repair intensity is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of an azimuth density imaging logging-while-drilling tool proposed by the utility model;

[0019] Figure 2 is Figure 1 an enlarged structural view of part A in

[0020] Figure 3 is Figure 1 Side view of the snap ring in the middle;

[0021] Figure 4 is Figure 1 Stereogram of the sealing cover plate in the middle.

[0022] In the figure: 1. Drill collar; 2. Sealing cover plate; 3. Rotating shaft; 4. Snap ring; 5. Slide block; 6. Spring; 7. Connecting rod; 8. Transparent glass; 9. Rubber gasket; 10. Torsion spring. Specific implementation manner

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0024] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0025] Embodiment 1

[0026] Refer to Figure 1-3, an azimuth density imaging logging-while-drilling tool, comprising a drill collar 1. An opening is provided on the rod wall of the drill collar 1, and a sealing cover plate 2 is provided at the opening. Two rotating shafts 3 are symmetrically and fixedly provided on one side of the sealing cover plate 2. Drilling grooves connected to the rotating shafts 3 are provided on both sides of the opening of the drill collar 1. The sealing cover plate 2 can rotate through the rotating shafts 3 and rotate out from the inside of the opening of the drill collar 1, facilitating the maintenance of the components inside the drill collar 1. A clamping ring 4 is movably sleeved on the rod wall of the drill collar 1. The clamping ring 4 is in clamping fit with the end of the sealing cover plate 2 away from the rotating shafts 3. The number of openings on the drill collar 1 is two, and the number of sealing cover plates 2 is two. The two sealing cover plates 2 are both in clamping fit through the same clamping ring 4. A sliding groove is provided on the rod wall of the drill collar 1 and on one side of the clamping ring 4, and a slider 5 is provided inside the sliding groove. A spring 6 is fixedly provided between the side wall of the slider 5 and the side wall of the sliding groove. A connecting rod 7 is fixedly provided on the side wall of the slider 5, and the end of the connecting rod 7 away from the slider 5 is fixedly connected to the side wall of the clamping ring 4. The number of sliders 5, the number of springs 6, and the number of connecting rods 7 are all two, and the sliders 5, springs 6, and connecting rods 7 are symmetrically distributed on both sides of the clamping ring 4. After maintenance, the sealing cover plate 2 is rotated and buckled inside the opening of the drill collar 1, and then the spring 6 applies an elastic force to the slider 5, so that the connecting rod 7 drives the clamping ring 4 to move and the sealing cover plate 2 is clamped through the clamping ring 4, thereby enabling the sealing cover plate 2 to be clamped and installed inside the opening of the drill collar 1.

[0027] Embodiment 2

[0028] Refer to Figure 1 and 4 , a transparent glass 8 is fixedly embedded on the surface of the sealing cover plate 2. The components inside the drill collar 1 can take pictures of the wellbore through the transparent glass 8. The sealing cover plate 2 is in the shape of a trapezoidal plate, and a rubber sealing gasket 9 is provided in the gap between the sealing cover plate 2 and the opening of the drill collar 1. The rubber sealing gasket 9 seals the gap between the sealing cover plate 2 and the opening, increasing the sealing performance between the sealing cover plate 2 and the opening of the drill collar 1.

[0029] Embodiment 3

[0030] Refer to Figure 1-2 , a torsion spring 10 is sleeved on the shaft wall of the rotating shaft 3, and the two ends of the torsion spring 10 are respectively fixedly connected to the sealing cover plate 2 and the drilling groove. When the clamping ring 4 is pushed to separate from the sealing cover plate 2, the torsion spring 10 can apply an elastic force to the sealing cover plate 2, enabling the sealing cover plate 2 to automatically rotate and pop out through the rotating shaft 3.

[0031] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. An azimuth density imaging logging-while-drilling tool, comprising a drill collar (1), characterized in that, The rod wall of the drill collar (1) is provided with an opening, and a sealing cover plate (2) is provided at the opening. Two rotating shafts (3) are symmetrically and fixedly provided on one side of the sealing cover plate (2). Drilling grooves connected to the rotating shafts (3) are provided on both sides of the opening of the drill collar (1). A clamping ring (4) is movably sleeved on the rod wall of the drill collar (1). The clamping ring (4) is in clamping fit with the end of the sealing cover plate (2) away from the rotating shaft (3). A sliding groove is formed in the rod wall of the drill collar (1) and on one side of the clamping ring (4), and a sliding block (5) is arranged inside the sliding groove. A spring (6) is fixedly arranged between the side wall of the sliding block (5) and the side wall of the sliding groove. A connecting rod (7) is fixedly arranged on the side wall of the sliding block (5), and the end of the connecting rod (7) away from the sliding block (5) is fixedly connected to the side wall of the clamping ring (4).

2. The azimuth density imaging logging-while-drilling tool according to claim 1, wherein A transparent glass (8) is fixedly embedded on the surface of the sealing cover plate (2).

3. The azimuth density imaging logging-while-drilling tool according to claim 1, wherein The sealing cover plate (2) is a trapezoidal plate, and a rubber sealing gasket (9) is arranged in the gap between the sealing cover plate (2) and the opening of the drill collar (1).

4. The azimuth density imaging logging-while-drilling tool according to claim 1, characterized in that, A torsion spring (10) is sleeved on the shaft wall of the rotating shaft (3), and the two ends of the torsion spring (10) are respectively fixedly connected to the sealing cover plate (2) and the drilling groove.

5. The azimuth density imaging logging-while-drilling tool according to claim 1, wherein The number of the sliding blocks (5), the number of the springs (6), and the number of the connecting rods (7) are all two, and the sliding blocks (5), the springs (6), and the connecting rods (7) are symmetrically distributed on both sides of the clamping ring (4).

6. The azimuth density imaging logging-while-drilling tool according to claim 1, wherein, The number of the openings on the drill collar (1) is two, and the number of the sealing cover plates (2) is two. The two sealing cover plates (2) are both in clamping fit through the same clamping ring (4).

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