While-drilling gamma detector sealing structure capable of preventing mud adhesion

Abstract

The utility model discloses a drilling gamma detector sealing structure capable of preventing mud adhesion, which comprises a shell, a gamma detector main body is mounted on the inner wall of the shell, a mounting head is arranged on the right side of the shell, a slot is formed in the inner wall of the shell, the left side of the mounting head is in contact with the inner wall of the slot, and the right side of the mounting head is in contact with the inner wall of the slot. A sealing block is fixedly connected to the left side of the mounting head, the outer side of the sealing block makes contact with the inner wall of the shell, a cavity is formed in the mounting head, and annularly-distributed through holes are formed in the inner wall of the cavity. According to the utility model, the installation head and the shell can be effectively sealed by adopting the stepped structure, and the installation head and the shell can be tightly attached by utilizing the matching of the locking clamping block and the clamping hole, so that the sealing effect between the installation head and the shell is further improved, and a high-temperature and high-pressure environment is effectively avoided; and the situation that the slurry enters the interior of the shell is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to gamma detector sealing structure technical field, more specifically, relate to a kind of mud sticking prevention while drilling gamma detector sealing structure. BACKGROUND

[0002] While drilling gamma detector is the key equipment in petroleum and natural gas drilling operation, for real-time measurement formation gamma ray intensity, in the drilling process, detector needs long-term exposure in high-density mud, high pressure, high temperature and severe vibration extreme environment, mud sticking prevention while drilling gamma detector sealing structure is the key component in petroleum drilling while drilling measurement (LWD) system, its design needs to consider high pressure, high temperature, mud corrosion and anti-adhesion etc. Harsh working conditions.

[0003] While drilling gamma detector is usually connected with drill collar (Drill Collar) by thread, forms a part of drill string, gamma detector main body is usually arranged inside cylindrical shell, shell will adopt segmented structure, can disassemble shell to maintain gamma detector, but segmented shell, the sealing of shell is particularly important, especially gamma detector needs to enter to bottom, needs to withstand high temperature and high pressure, so that mud can penetrate into sealing interface, accelerate the wear of sealing element, reduce air tightness and waterproofness. SUMMARY

[0004] In view of the problems in the prior art, the utility model aims at providing a kind of mud sticking prevention while drilling gamma detector sealing structure to solve the problems in the background art.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A kind of mud sticking prevention while drilling gamma detector sealing structure, including shell, the inner wall of the shell is mounted with gamma detector main body, the right side of the shell is provided with mounting head, the inner wall of the shell is equipped with slot, the left side of the mounting head is in contact with the inner wall of slot, the left side of the mounting head is fixedly connected with sealing block, the outer side of the sealing block is in contact with the inner wall of shell, the inside of the mounting head is equipped with cavity, the inner wall of the cavity is equipped with annular distribution's through-hole, the inner wall of the through-hole is slidably connected with clamping block, the inner wall of the slot is equipped with annular distribution's clamping hole, the shape of the clamping hole is trapezoidal arrangement, the side of the clamping block close to clamping hole is equipped with contact surface, the side of the clamping block away from clamping hole is fixedly connected with trapezoidal block, the side between the trapezoidal block of the trapezoidal block and cavity inner wall is fixedly connected with spring, the mounting head is inserted with the screw rod of screw connection therewith, the left end of the screw rod is rotatably connected with rotary block, the outer side of the rotary block is in contact with the inclined surface of trapezoidal block, the opposite side of the mounting head and shell is fixedly connected with threaded block, the right side The threaded block is equipped with round hole.

[0007] As a further description of the above technical solutions:

[0008] The left side of the sealing block is fixedly connected with a circular block, and the inner wall of the shell is fixedly connected with a sealing ring in contact with the circular block.

[0009] As a further description of the above technical solutions:

[0010] The inner wall of the shell is embedded with a sealing ring, and the inner side of the sealing ring is in contact with the sealing block.

[0011] As a further description of the above technical solutions:

[0012] A ring groove is formed on the mounting head, a memory alloy ring is sleeved on the inner wall of the ring groove, and the memory alloy ring is a NiTiCu ternary alloy layer.

[0013] As a further description of the above technical solutions:

[0014] A stop ring is sleeved on the mounting head and is threadedly connected with the mounting head, and the right end of the shell is provided with a contact groove in contact with the stop ring.

[0015] As a further description of the above technical solutions:

[0016] A mud adhesion resistant coating is sprayed on the surface of the shell, and the mud adhesion resistant coating is a polytetrafluoroethylene coating.

[0017] Compared with the prior art, the advantages of the present application are:

[0018] The stepped structure can effectively seal the mounting head and the shell, and the cooperation of the locking block and the clamping hole can make the mounting head and the shell tightly fit, further improve the sealing effect between the mounting head and the shell, effectively avoid the situation that the mud enters the shell under high temperature and high pressure, and improve the stability of the device. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a perspective view of the utility model;

[0020] Figure 2 It is a perspective view of the utility model;

[0021] Figure 3 It is a sectional view of the utility model;

[0022] Figure 4 It is a perspective view of the utility model; Figure 3 It is an enlarged view of the middle A part of the utility model;

[0023] Figure 5 It is a perspective view of the mounting head in the utility model.

[0024] Explanation of reference numerals in the drawings:

[0025] 1, shell; 2, gamma detector main body; 3, mounting head; 4, slot; 5, sealing block; 6, cavity; 7, through hole; 8, clamping block; 9, clamping hole; 10, contact surface; 11, trapezoidal block; 12, spring; 13, lead screw; 14, threaded block; 15, rotating block; 16, circular block; 17, sealing ring; 18, sealing ring; 19, ring groove; 20, memory alloy ring; 21, blocking ring; 22, contact groove. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model;

[0027] Please refer to Figures 1-5 The utility model discloses: a mud adhesion prevention's while drilling gamma detector sealing structure, including shell 1, the inner wall of shell 1 is installed with gamma detector main body 2, the right side of shell 1 is provided with mounting head 3, the inner wall of shell 1 is set up with slot 4, the left side of mounting head 3 and the inner wall of slot 4 are contacted, the left side of mounting head 3 is fixedly connected with sealing block 5, the outer side of sealing block 5 and the inner wall of shell 1 are contacted, the inside of mounting head 3 is set up with cavity 6, the inner wall of cavity 6 is set up with annular distribution through hole 7, the inner wall of through hole 7 is slidably connected with clamping block 8, the inner wall of slot 4 is set up with annular distribution clamping hole 9, the shape of clamping hole 9 is trapezoidal arrangement, the side of clamping block 8 close to clamping hole 9 is set up with contact surface 10, the side of clamping block 8 away from clamping hole 9 is fixedly connected with trapezoidal block 11, the side between trapezoidal block 11 and the inner wall of cavity 6 is fixedly connected with spring 12, the lead screw 13 of screw connection with its on mounting head 3 is inserted, the left end of lead screw 13 is rotatably connected with rotating block 15, the outer side of rotating block 15 and the inclined surface of trapezoidal block 11 are contacted, the opposite side of mounting head 3 and shell 1 is fixedly connected with threaded block 14, the right side threaded block 14 is set up with round hole.

[0028] The utility model discloses a sealing device for installation head, including shell 1, the right side of shell 1 is provided with the installation head 3, installation head 3 is provided with the plug groove 4, the left side of plug groove 4 is provided with the sealing block 5, the right side of sealing block 5 is provided with the rotating knob 6, the left side of rotating knob 6 is provided with the rotating handle 7, the right side of rotating handle 7 is provided with the rotating block 15, the left side of rotating block 15 is provided with the trapezoidal block 11, the right side of trapezoidal block 11 is provided with the clamping block 8, the right side of clamping block 8 is provided with the contact surface 10, the right side of contact surface 10 is provided with the plug hole 9, the right side of plug hole 9 is provided with the locking block 2, the right side of locking block 2 is provided with the screw rod 13, the right side of screw rod 13 is provided with the cross groove 14, the right side of cross groove 14 is provided with the circular block 16, the right side of circular block 16 is provided with the sealing ring 17, the right side of sealing ring 17 is provided with the sealing ring 18, the right side of sealing ring 18 is provided with the ring groove 19, the right side of ring groove 19 is provided with the memory alloy ring 20.

[0029] Please refer to Figure 3 Among them: the left side of sealing block 5 is fixedly connected with the circular block 16, the inner wall of shell 1 is fixedly connected with the sealing ring 17 that circular block 16 contacts.

[0030] In the utility model, the setting of circular block 16 and sealing ring 17 can further lengthen the length of trapezoidal structure, and then improve the sealing effect on shell 1.

[0031] Please refer to Figure 3 Among them: the inner wall of shell 1 is embedded with the sealing ring 18, and the inner side of sealing ring 18 contacts sealing block 5.

[0032] In the utility model, sealing ring 18 can improve the sealing effect between sealing block 5 and shell 1, and improve the stability of the device.

[0033] Please refer to Figures 3-5 Among them: ring groove 19 is set up on installation head 3, memory alloy ring 20 is sleeved on the inner wall of ring groove 19, and memory alloy ring 20 is NiTiCu ternary alloy layer.

[0034] In the utility model, the temperature of the underground can heat memory alloy ring 20 after the equipment enters the underground, memory alloy ring 20 will expand after being heated, memory alloy ring 20 will be closely attached to the inner wall of ring groove 19 and plug groove 4, and effective sealing effect is formed, and the sealing property of the device is improved.

[0035] Please refer toFigures 1-5 Wherein: the mounting head 3 is sleeved with a blocking ring 21 which is threadedly connected with the mounting head 3, and the right end of the shell 1 is provided with a contact groove 22 which is in contact with the blocking ring 21.

[0036] In the utility model, the blocking ring 21 can be used to shield the gap between the mounting head 3 and the shell 1, thereby improving the practicability of the device.

[0037] Please refer to Figure 1 With 2 Wherein: the surface of the shell 1 is sprayed with a mud adhesion prevention coating, and the mud adhesion prevention coating is a polytetrafluoroethylene coating.

[0038] In the utility model, the mud adhesion prevention coating sprayed on the surface of the shell 1 can effectively prevent the mud from adhering to the surface of the shell 1, thereby improving the working effect of the gamma detector main body 2.

[0039] The above is only the preferred specific embodiment of the utility model; however, the protection scope of the utility model is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the improvement concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A mud-adhesion-preventing structure of a while-drilling gamma detector, comprising a shell (1), characterized in that: The inner wall of the shell (1) is provided with a gamma detector body (2), the right side of the shell (1) is provided with a mounting head (3), the inner wall of the shell (1) is provided with a slot (4), the left side of the mounting head (3) is in contact with the inner wall of the slot (4), the left side of the mounting head (3) is fixedly connected with a sealing block (5), the outer side of the sealing block (5) is in contact with the inner wall of the shell (1), the inside of the mounting head (3) is provided with a cavity (6), the inner wall of the cavity (6) is provided with a through hole (7) distributed in a ring shape, the inner wall of the through hole (7) is slidably connected with a clamping block (8), the inner wall of the slot (4) is provided with a clamping hole (9) distributed in a ring shape, the clamping hole (9) is arranged in a trapezoidal shape, one side of the clamping block (8) close to the clamping hole (9) is provided with a contact surface (10), one side of the clamping block (8) away from the clamping hole (9) is fixedly connected with a trapezoidal block (11), the trapezoidal block (11) is fixedly connected with a spring (12) between one side and the inner wall of the cavity (6), the mounting head (3) is penetrated by a lead screw (13) threadedly connected therewith, the left end of the lead screw (13) is rotatably connected with a rotating block (15), the outer side of the rotating block (15) is in contact with the inclined surface of the trapezoidal block (11), the opposite side of the mounting head (3) and the shell (1) is fixedly connected with a threaded block (14), and a circular hole is formed in the right threaded block (14).

2. The mud-adhesion-resistant MWD gamma detector seal of claim 1, wherein: The left side of the sealing block (5) is fixedly connected with a circular block (16), and the inner wall of the shell (1) is fixedly connected with a sealing ring (17) in contact with the circular block (16).

3. The mud-adhesion-resistant MWD gamma detector seal of claim 1, wherein: The inner wall of the shell (1) is embedded with a sealing ring (18), and the inner side of the sealing ring (18) is in contact with the sealing block (5).

4. The mud-adhesion-resistant MWD gamma detector seal of claim 1, wherein: An annular groove (19) is formed in the mounting head (3), a memory alloy ring (20) is sleeved on the inner wall of the annular groove (19), and the memory alloy ring (20) is a NiTiCu ternary alloy layer.

5. The mud-adhesion-resistant MWD gamma detector seal of claim 1, wherein: A stop ring (21) is sleeved on the mounting head (3) and threadedly connected with the mounting head (3), and a contact groove (22) is formed in the right end of the shell (1) and in contact with the stop ring (21).

6. The mud-adhesion-resistant MWD gamma detector seal of claim 1, wherein: A mud adhesion resistant coating is sprayed on the surface of the shell (1), and the mud adhesion resistant coating is a polytetrafluoroethylene coating.

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