Lead printing structure of sidetrack horizontal well

Abstract

The utility model relates to a sidetrack horizontal well lead printing structure and belongs to tools for sidetrack horizontal wells. The sidetrack horizontal well lead printing structure comprises a protective cylinder, a lead body is inserted into the bottom of the protective cylinder, a water hole is formed in the center of the lead body, a hidden hole is formed in the outer wall of a circular truncated cone section I of the protective cylinder, and a bolt is connected into the hidden hole in a threaded mode. A reducing fixing ring is fixed to the top of the lead body, planes with the same number as the hidden holes are arranged on the outer surface of the reducing fixing ring, anti-falling notches are formed in the planes and correspond to the hidden holes, and one ends of bolts are arranged in the anti-falling notches and matched with the anti-falling notches. After the lead body of the device is connected with the pile casing in an inserted mode, a wrench is used for rotating the bolt clockwise so that the end of the bolt can enter the anti-falling notch, the lead body can be fixed, the situation of loosening or falling is avoided, and the lead body can more accurately detect the level of a drilling well; after the lead body is in butt joint with the pile casing, the clamping plates make contact with the outer surface of the lead body, the clamping plates can be tightly attached to the lead body under the action of the springs to clamp and fix the lead body, labor force can be reduced, and installation of workers is facilitated.

Description

Technical Field

[0001] The utility model belongs to a tool for side-drilling a horizontal well, in particular to a lead printing structure for side-drilling a horizontal well. Background Art

[0002] The sidetracking horizontal well technology is an efficient technical means in modern oil and gas development. It can drill a new wellbore laterally on the basis of the original wellbore, thereby developing hard-to-reach oil and gas resources. In the construction process of this technology, in order to ensure the accuracy and efficiency of drilling, it is crucial to use lead printing technology to record and mark the wellbore trajectory and formation information.

[0003] After searching, the Chinese patent with the announcement number CN216517955U and the name of a protective lead seal for horizontal wells comprises a metal body, an upper joint thread is arranged at one end of the metal body, a lead seal mounting hole is arranged at the other end, and a lead seal is cast in the lead seal mounting hole; the structural setting of the lead seal is not easy to disassemble the lead seal, resulting in the need to replace the entire device when it is used again, which increases the cost of use; for another example, the announcement number CN203035184U and the name of a Chinese patent for a side-drilling horizontal well lead seal, the lead body designed is cast between the inner shaft and the casing, the casing protects the lead body, the lead body will not deform and fall off, and can be used for side-drilling horizontal wells and inclined wells. The lower end face of the lead body protrudes from the lower end face of the casing by a certain height, which can meet the requirements of lead sealing after falling objects in the well and deformation of the wellbore; however, the structural setting of the lead seal is not easy to replace the lead seal, and the casing is limited at the top and bottom and is not easy to disassemble, which is troublesome to use. Utility Model Content

[0004] The utility model provides a lead printing structure for side-drilling horizontal wells in order to solve the deficiencies of the prior art.

[0005] The utility model discloses a lead printing structure for a side-drilling horizontal well, comprising a casing, a lead body is inserted into the bottom of the casing, a water hole is opened at the center of the lead body, a hidden hole is arranged on the outer surface of the casing, the casing is composed of a straight tube section I, a truncated cone section I, a truncated cone section II and a straight tube section II connected in sequence from bottom to top, more than three hidden holes are evenly distributed around the outer wall of the truncated cone section I of the casing, and bolts are threadedly connected inside the hidden holes; a reducing fixing ring is fixedly connected to the top of the lead body, planes with the same number as the above-mentioned hidden holes are arranged at intervals on the outer surface of the reducing fixing ring, and anti-falling notches are opened inside the planes, the anti-falling notches correspond to the above-mentioned hidden holes, and one end of the bolt is placed in the anti-falling notch to match it.

[0006] As a further improvement of the present invention, the inner wall of the reducing fixing ring is fixedly connected with two or more positioning blocks; a mounting groove for the reducing fixing ring is opened in the truncated cone section I of the casing, and two or more positioning grooves are arranged around the inner ring wall of the mounting groove; the positioning groove is used in conjunction with the positioning blocks, and the reducing fixing ring can be inserted into the mounting groove.

[0007] As a further improvement of the utility model, three or more receiving grooves are circumferentially provided on the inner wall of the straight tube section I of the casing, and a clamping device is provided inside the receiving groove.

[0008] As a further improvement of the utility model, the clamping device includes a splint, sleeve one, sleeve two and a spring, one end of sleeve two is fixed to the inner wall of the storage groove, one end of sleeve one is placed in sleeve two and slidably connected thereto, a spring is provided in sleeve one and sleeve two, and the other end of sleeve one is fixed to the splint.

[0009] As a further improvement of the utility model, the clamp is composed of a straight section in the middle and raised sections at both ends fixedly connected, and a plurality of protrusions are provided on the end surface of the straight section of the clamp close to the lead body, and the surface of the protrusions contacts the outer surface of the lead body.

[0010] As a further improvement of the utility model, one end of the spring is fixedly connected to an inner wall of the sleeve, and the other end of the spring is fixedly connected to the inner wall of the receiving groove.

[0011] The utility model discloses a side drilling horizontal well lead printing structure, the structure design is reasonable, by setting the diameter reducing fixing ring, when the lead body and the casing are plugged in, the bolt is turned clockwise with a wrench to make its end enter the anti-falling groove, the diameter reducing fixing ring can be fixed, and the lead body is fixed, because the anti-falling groove is concave, when the bolt is loose, it can be limited by the anti-falling groove to drag the diameter reducing fixing ring, and the diameter reducing fixing ring will not fall off, this method can better fix the lead body, avoid the situation of loosening or falling off, and make the lead body The drilling level detection is more accurate and efficient, and the installation and disassembly of the lead body is simple and easy to operate. By setting the splint, when the lead body is docked with the casing, the splint contacts the outer surface of the lead body, and the splint will be tightly attached to the lead body under the action of spring elasticity to clamp the lead body. Since a number of bumps are provided on the contact surface between the splint and the lead body, the friction between the splint and the lead body can be increased to clamp the lead body firmly. At this time, the staff does not need to drag the lead body continuously, which can reduce labor and make it more convenient for the staff to install the bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 It is a cross-sectional view of the utility model;

[0014] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0015] Figure 4 This is a schematic diagram of the lead body structure of the utility model;

[0016] Figure 5 It is a schematic diagram of the internal structure of the casing of the present utility model. DETAILED DESCRIPTION

[0017] The utility model discloses a side-drilling horizontal well lead printing structure, comprising a casing 1, wherein the casing 1 is composed of a straight tube section Ⅰ102, a truncated cone section Ⅰ103, a truncated cone section Ⅱ104 and a straight tube section Ⅱ105 connected in sequence from bottom to top, a water hole is arranged in the casing 1, more than three hidden holes 12 are evenly distributed around the outer wall of the truncated cone section Ⅰ103 of the casing 1, and bolts 121 are threadedly connected inside the hidden holes 12; a lead body 11 is inserted into the bottom of the casing 1, a water eye 111 is arranged at the center of the lead body 11, and the water eye 111 is connected with the water hole.

[0018] A reducing ring 112 is fixedly connected to the top of the lead body 11, and planes 114 with the same number as the hidden holes 12 are arranged on the outer surface of the reducing ring 112 at intervals, and anti-falling notches 115 are opened inside the planes 114. The anti-falling notches 115 correspond to the hidden holes 12, and one end of the bolt 121 is placed in the anti-falling notch 115 to match it. Placing one end of the bolt 121 in the anti-falling notch 115 can prevent the reducing ring 112 from falling off, and can better The lead body 11 is fixed to make the lead body 11 more accurate and efficient in drilling level detection; more than two positioning blocks 113 are fixedly connected to the inner wall of the reduced diameter fixing ring 112, and a mounting groove 13 of the reduced diameter fixing ring 112 is opened in the truncated cone section Ⅰ103 of the casing 1, and more than two positioning grooves 131 are arranged around the inner ring wall of the mounting groove 13. The positioning groove 131 is used in conjunction with the positioning block 113, and the reduced diameter fixing ring 112 can be inserted into the mounting groove 13, which can play a role in positioning the reduced diameter fixing ring 112.

[0019] The inner wall of the straight tube section I of the casing 1 is provided with more than three receiving grooves 14 around its circumference, and a clamping device is provided inside the receiving groove 14, and the clamping device includes a clamping plate 141, a sleeve 142, a sleeve 2 143 and a spring 144, one end of the sleeve 2 143 is fixed to the inner wall of the receiving groove 14, one end of the sleeve 142 is placed in the sleeve 2 143 and is slidably connected thereto, the other end of the sleeve 142 is fixed to the clamping plate 141, a spring 144 is provided in the sleeve 142 and the sleeve 2 143, and one end of the spring 144 is fixed to the sleeve 1 42 is fixedly connected to the inner wall of the receiving groove 14, and the other end is fixedly connected to the inner wall of the receiving groove 14. The clamping plate 141 is composed of a straight plate section in the middle and raised sections at both ends. A plurality of protrusions are provided on the end face of the straight plate section of the clamping plate 141 close to the lead body 11. The surface of the protrusions is in contact with the outer surface of the lead body 11. The design of the protrusions can increase the friction between the clamping plate 141 and the lead body 11, and firmly clamp the lead body 11. At this time, the staff does not need to continuously drag the lead body 11 for installation, which can reduce labor and make it more convenient for the staff to install the bolts 121.

[0020] When the lead body 11 is installed, the lead body 11 is first inserted from the bottom of the casing 1. When the outer wall of the reduced diameter fixing ring 112 contacts the clamping plate 141, since the two ends of the clamping plate 141 are warped sections, the reduced diameter fixing ring 112 will push the outer side of the clamping plate 141. At this time, the sleeve 142 slides in the sleeve 2 143 to squeeze the spring 144. Then, the positioning block 113 is inserted into the corresponding positioning groove 131 to complete the docking of the lead body 11 and the casing 1. The anti-drop notch 115 is aligned with the hidden hole 12. At this time, the lead body 11 contacts the clamping plate 141. The clamping plate 141 can push the lead body under the elastic action of the spring 144. 11 is clamped and fixed, and the staff does not need to continue to drag the lead body 11 by hand, which can reduce labor. Then the bolt 121 can be screwed into the hidden hole 12 and the anti-falling groove 115 to complete the installation of the lead body 11. Since the anti-falling groove 115 is recessed, the bolt 121 can enter the anti-falling groove 115, and when the bolt 121 is loose, it can be limited by the anti-falling groove 115 to support the reducing fixing ring 112, and the reducing fixing ring 112 will not fall off. This method can better fix the lead body 11, avoid loosening or falling off, and make the lead body 11 more accurate and efficient in drilling level detection.

Claims

1. A lead printing structure for a side-drilling horizontal well, comprising a casing (1), a lead body (11) being inserted at the bottom of the casing (1), a water hole (111) being provided at the center of the lead body (11), and a hidden hole (12) being provided on the outer surface of the casing (1), characterized in that: The casing (1) is composed of a straight tube section I, a truncated cone section I, a truncated cone section II and a straight tube section II connected in sequence from bottom to top. Three or more hidden holes (12) are evenly distributed around the outer wall of the truncated cone section I of the casing (1), and bolts (121) are threadedly connected inside the hidden holes (12); a reduced diameter fixing ring (112) is fixedly connected to the top of the lead body (11), and planes (114) with the same number as the hidden holes (12) are arranged at intervals on the outer surface of the reduced diameter fixing ring (112), and anti-dropping notches (115) are arranged inside the planes (114), and the anti-dropping notches (115) correspond to the hidden holes (12), and one end of the bolt (121) is placed in the anti-dropping notch (115) to match it.

2. A sidetracking horizontal well lead printing structure according to claim 1, characterized in that: The inner wall of the reduced diameter fixing ring (112) is fixedly connected with two or more positioning blocks (113); a mounting groove (13) for the reduced diameter fixing ring (112) is provided in the truncated cone section I of the casing (1); and two or more positioning grooves (131) are provided around the inner wall of the mounting groove (13); the positioning grooves (131) are used in conjunction with the positioning blocks (113) so that the reduced diameter fixing ring (112) can be inserted into the mounting groove (13).

3. A sidetracking horizontal well lead printing structure according to claim 1, characterized in that: The inner wall of the straight tube section I of the casing (1) is provided with more than three receiving grooves (14) around its circumference, and a clamping device is provided inside the receiving groove (14).

4. A sidetracking horizontal well lead printing structure according to claim 3, characterized in that: The clamping device comprises a clamping plate (141), a sleeve 1 (142), a sleeve 2 (143) and a spring (144); one end of the sleeve 2 (143) is fixed to the inner wall of the receiving groove (14); one end of the sleeve 1 (142) is placed in the sleeve 2 (143) and is slidably connected thereto; a spring (144) is provided in the sleeve 1 (142) and the sleeve 2 (143); the other end of the sleeve 1 (142) is fixed to the clamping plate (141).

5. A sidetracking horizontal well lead printing structure according to claim 4, characterized in that: The clamping plate (141) is composed of a straight plate section in the middle and raised sections at both ends that are fixedly connected. A plurality of protrusions are provided on the end surface of one side of the straight plate section of the clamping plate (141) close to the lead body (11), and the surface of the protrusions is in contact with the outer surface of the lead body (11).

6. A sidetracking horizontal well lead printing structure according to claim 4, characterized in that: One end of the spring (144) is fixedly connected to the inner wall of the sleeve (142), and the other end is fixedly connected to the inner wall of the receiving groove (14).

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