Convenient-to-mount casing centralizer for radial drilling

Abstract

The utility model relates to the technical field of centralizers, in particular to a casing centralizer convenient to install and used for radial well drilling, and aims to solve the problem that a gasket is used and thread torque is adjusted when a traditional centralizer is installed, so that the installation difficulty is increased. Comprising a centralizer body, a drilling tool, centralizing wings, a casing pipe, a limiting block, a first sliding groove, a ring groove, a second sliding groove, a third sliding groove, a sliding block and a displacement mechanism, during installation, the casing pipe is inserted into the drilling tool, the limiting block slides into the ring groove along the first sliding groove, the centralizer body and the drilling tool are axially limited, the displacement mechanism controls the sliding block to be located in the second sliding groove and the third sliding groove at the same time, and the centralizing wings are arranged on the casing pipe. The centralizer body and the drilling tool are limited in the radial direction, in this way, the centralizer and the drilling tool can be stably connected only by inserting the sleeve, twisting the sleeve and controlling the displacement of the sliding block, installation is very convenient and fast, a gasket does not need to be additionally used, thread torque does not need to be adjusted, and installation is very convenient and fast.

Description

TECHNICAL FIELD

[0001] The utility model relates to a centralizer technical field, and the specific field is a casing centralizer for radial drilling convenient to install. BACKGROUND

[0002] In the exploitation process of oil, natural gas and other resources, drilling is a crucial link. Radial drilling technology is a special drilling method, which can drill branch wellbores along the radial direction on the basis of the main wellbore, thereby increasing the oil drainage area of the oil reservoir and improving the recovery rate. The centralizer plays a key role in the radial drilling process. It is mainly used to ensure that the drilling assembly is in the correct position in the wellbore, prevent the drilling assembly from deviating, and improve the drilling accuracy. In this special drilling operation of radial drilling, due to the particularity of the drilling direction, there is a higher requirement for the installation convenience of the centralizer.

[0003] The traditional centralizer has a complex structure design and contains multiple components. During installation, additional adjustments may be required, such as the use of shims, adjustment of thread torque, etc., which increases the difficulty of installation. During installation, each component needs to be accurately assembled and adjusted. In the construction site of radial drilling, this complex installation process greatly increases the operation time and reduces the drilling efficiency. SUMMARY

[0004] The utility model discloses in order to solve the problem that the traditional centralizer uses shims, adjusts thread torque during installation, increases the difficulty of installation, and further provides a casing centralizer for radial drilling convenient to install.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a casing centralizer for radial drilling convenient to install, comprising: a centralizer body, the centralizer body is provided with a drilling assembly at both ends, the outer surface of the centralizer body is connected with a centralizing wing, the both ends of the centralizer body are connected with a casing, the outer end of the casing is connected with a limiting block, a sliding groove one parallel to the axial direction of the drilling assembly is formed in the inner wall of the drilling assembly, the one end of the sliding groove one close to the centralizer body is connected with the outside, the inner end of the sliding groove one is connected with a ring groove, the ring groove is formed in the circumferential direction of the inner wall of the drilling assembly, the limiting block can slide in the circumferential direction in the sliding groove one, when sliding to the top of the sliding groove one, the limiting block can slide in the circumferential direction in the ring groove, the outer wall of the centralizer body at the joint with the drilling assembly is provided with a sliding groove two, the outer wall of the drilling assembly at the joint with the centralizer body is provided with a sliding groove three, when the sliding groove two and the sliding groove three coincide, the limiting block is located in the ring groove, the sliding block is slidably connected in the sliding groove two and the sliding groove three, and the sliding block is displaced in the sliding groove two and the sliding groove three through a displacement mechanism.

[0006] Preferably, the displacement mechanism comprises a sliding rod connected to the lower end of the sliding block, the sliding rod is slidingly connected in a sliding rod hole, one end of the sliding rod hole is opened towards the central body of the centralizer, and the other end of the sliding rod hole is in communication with the bottom of the second sliding groove, a spring is sleeved on the sliding rod, and the two ends of the spring are in contact with the sliding block and the bottom wall of the second sliding groove respectively, and the spring is in a compressed state.

[0007] Preferably, the lower end of the sliding block is connected with a baffle, the baffle can block the second sliding groove, the baffle is slidingly connected in a baffle sliding groove, and the sliding groove is opened in the outer wall of the centralizer body.

[0008] Preferably, the outer surface of the sliding block is connected with a push piece.

[0009] Compared with the prior art, the utility model has the beneficial effects that:

[0010] When installing, the sleeve is inserted into the drilling tool, the limiting block is slid along the first sliding groove into the annular groove, the centralizer body and the drilling tool are axially limited, the sliding block is controlled by the displacement mechanism to be located in the second sliding groove and the third sliding groove at the same time, the centralizer body and the drilling tool are radially limited, and thus only three steps of inserting the sleeve, twisting the sleeve and controlling the displacement of the sliding block are needed, so that the centralizer and the drilling tool can be stably connected, and the installation is very convenient and does not need to additionally use a gasket and adjust the screw torque.

[0011] When the second sliding groove and the third sliding groove coincide, the sliding block automatically enters the third sliding groove under the action of the spring, manual operation is not needed, and the installation efficiency is further improved. ACCURATE DRAWINGS

[0012] Figure 1 The structure of the utility model is shown Figure 1 ;

[0013] Figure 2 The structure of the utility model is shown Figure 1 ;

[0014] Figure 3 The structure of the utility model Figure 2 is shown in an enlarged view;

[0015] Figure 4 The structure of the utility model is shown Figure 2 ;

[0016] Figure 5 The structure of the utility model is shown Figure 2 .

[0017] In the drawing: the centralizer body 1; the drilling tool 2; the centralizing wing 3; the sleeve 4; the limiting block 5; the first sliding groove 6; the annular groove 7; the second sliding groove 8; the third sliding groove 9; the sliding block 10; the displacement mechanism 11; the sliding rod 111; the sliding rod 111; the sliding rod hole 112; the spring 113; the baffle 114; the baffle sliding groove 115; and the push piece 116. DETAILED DESCRIPTION

[0018] 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. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0019] The rotary connection in the device refers to the rotary connection by baking the bearing on the shaft, the shaft or the shaft hole is provided with a spring retainer groove, the axial fixation of the bearing is realized by clamping the elastic retainer in the retainer groove, and rotation is realized.

[0020] The utility model will be described in detail below with reference to the drawings.

[0021] The utility model will be described in detail below with reference to the drawings. Figures 1-5 The utility model discloses a kind of radial drilling casing centralizers of easy installation, comprising: casing centralizer body 1 two ends are connected with casing 4 respectively, the outer end of casing 4 is connected with limiting block 5, the inner wall of drilling tool 2 is provided with the sliding groove one 6 parallel with the axial direction of drilling tool 2, the one end of sliding groove one 6 is connected with outside, the inner end of sliding groove one 6 is connected with annular groove 7, annular groove 7 is provided in the inner wall circumferential direction of drilling tool 2, limiting block 5 can be slid in sliding groove one 6 in circumferential direction, when sliding to the top of the sliding groove one 6, limiting block 5 can be slid in annular groove 7 in circumferential direction, the outer wall of casing centralizer body 1 at the junction of casing centralizer body 1 and drilling tool 2 is provided with sliding groove two 8, the outer wall of drilling tool 2 at the junction of casing centralizer body 1 and drilling tool 2 is provided with sliding groove three 9, when sliding groove two 8 and sliding groove three 9 coincide, limiting block 5 is located in annular groove 7, sliding block 10 is slidably connected in sliding groove two 8 and sliding groove three 9, sliding block 10 is displaced in sliding groove two 8 and sliding groove three 9 by displacement mechanism 11.

[0022] When installing, casing 4 is inserted into drilling tool 2, limiting block 5 is slid into annular groove 7 along sliding groove one 6, casing 4 is twisted so that limiting block 5 completely enters annular groove 7, limiting block 5 cannot be axially displaced along casing centralizer body 1, axial limiting of casing centralizer body 1 and drilling tool 2 is completed, sliding block 10 is controlled to be located in sliding groove two 8 and sliding groove three 9 simultaneously by displacement mechanism 11, casing centralizer body 1 and drilling tool 2 cannot be relatively rotated under the action of sliding block 10, radial limiting of casing centralizer body 1 and drilling tool 2 is completed, so that only three steps of inserting casing 4, twisting casing 4 and controlling the displacement of sliding block 10 are needed, and casing centralizer body 1 and drilling tool 2 can be stably connected, which is very convenient to install and does not need to use gasket and adjust screw torque additionally.

[0023] The displacement mechanism 11 comprises a slide rod 111 connected to the lower end of the sliding block 10, the slide rod 111 is slidingly connected in the slide rod hole 112, the slide rod hole 112 is distributed along the axial direction of the centralizer body 1, one end of the slide rod hole 112 is opened towards the centralizer body 1, and the other end of the slide rod hole 112 is communicated with the bottom of the slide groove two 8, the spring 113 is sleeved on the slide rod 111, the two ends of the spring 113 are respectively in contact with the sliding block 10 and the bottom wall of the slide groove two 8, and the spring 113 is in a compressed state.

[0024] After the sleeve 4 is inserted into the drilling tool 2, the drilling tool 2 completely presses the sliding block 10 into the slide groove two 8, the spring 113 is further compressed, when the slide groove two 8 coincides with the slide groove three 9, under the action of the spring 113, the sliding block 10 automatically enters the slide groove three 9, without manual operation, further improving the installation efficiency.

[0025] The lower end of the sliding block 10 is connected with a baffle 114, the baffle 114 can shield the slide groove two 8, the baffle 114 is slidingly connected in the baffle slide groove 115, and the slide groove 115 is opened in the outer wall of the centralizer body 1.

[0026] The baffle 114 shields the slide groove two 8, so that dirt does not enter the slide groove two 8 during drilling, and the internal parts of the slide groove two 8 are protected from being viewed and sand.

[0027] The outer surface of the sliding block 10 is connected with a push piece 116.

[0028] The push piece 116 facilitates manual control of the displacement of the sliding block 10 and facilitates disassembly.

[0029] In the description of the present application, unless otherwise explicitly specified and limited, the terms "installation", "connection", "connection", "fixation" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] The standard parts used in the present application can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, and the specific connection mode of each part adopts the conventional means such as bolt, rivet and welding in the prior art, the machinery, parts and equipment adopt the conventional type in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail here.

[0031] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A casing centralizer for radial drilling that is easy to install, comprising: The stabilizer body (1) has drill bits (2) at both the upper and lower ends, and stabilizer wings (3) are connected to the outer surface of the stabilizer body (1). The feature is that: the centralizer body (1) is connected to two sleeves (4) at both ends, and the outer end of the sleeve (4) is connected to a limiting block (5). The inner wall of the drill bit (2) is provided with a sliding groove (6) parallel to the axial direction of the drill bit (2). The end of the sliding groove (6) near the centralizer body (1) is connected to the outside. The inner end of the sliding groove (6) is connected to an annular groove (7). The annular groove (7) is opened in the circumferential direction of the inner wall of the drill bit (2). The limiting block (5) can slide in the sliding groove (6) in the circumferential direction. When it slides to the top of the sliding groove (6), the limiting block (5) It can slide in the circumferential groove (7). The outer wall of the stabilizer body (1) where the stabilizer body (1) connects with the drill bit (2) is provided with a second groove (8). The outer wall of the drill bit (2) where the stabilizer body (1) connects with the drill bit (2) is provided with a third groove (9). When the second groove (8) and the third groove (9) overlap, the limiting block (5) is located in the circumferential groove (7). A slider (10) is slidably connected in the second groove (8) and the third groove (9). The slider (10) is displaced in the second groove (8) and the third groove (9) through the displacement mechanism (11).

2. The radial drilling casing centralizer as described in claim 1, characterized in that: The displacement mechanism (11) includes a slide rod (111), which is connected to the lower end of the slider (10). The slide rod (111) is slidably connected in the slide rod hole (112). One end of the slide rod hole (112) is opened in the body (1) of the stabilizer, and the other end of the slide rod hole (112) is connected to the bottom of the second slide groove (8). A spring (113) is sleeved on the slide rod (111). The two ends of the spring (113) are in contact with the bottom wall of the slider (10) and the second slide groove (8), respectively. The spring (113) is in a compressed state.

3. A radial drilling casing centralizer for easy installation according to claim 2, characterized in that: The lower end of the slider (10) is connected to a baffle (114), which can block the second slide groove (8). The baffle (114) is slidably connected in the baffle slide groove (115), which is opened on the outer wall of the stabilizer body (1).

4. A radial drilling casing centralizer for easy installation according to claim 2, characterized in that: The outer surface of the slider (10) is connected to a paddle (116).

Images