Drill rod for oil development

Abstract

The utility model discloses a drill rod for oil development, which comprises a first drill rod and a second drill rod, one end of the first drill rod is sleeved with a first connecting shaft, one end of the second drill rod is sleeved with a second connecting shaft, one end of the first connecting shaft close to the second drill rod is fixedly connected with a connector, the connector is in threaded connection with a nut, and the nut is sleeved on the second drill rod. The first connecting shaft and the second connecting shaft are connected through two sets of symmetrically-arranged fixing assemblies, and a limiting assembly is arranged between the first drill rod and the second drill rod. According to the drill rod, the first drill rod body and the second drill rod body can be connected more firmly, when the drill rod reaches a certain depth, even if the connecting position of the first drill rod body and the second drill rod body suffers from large internal and external pressure and shearing force, the connecting position can be stabilized through the fixing assembly, and therefore the drill rod is prevented from being broken.

Description

Technical Field

[0001] The utility model belongs to the technical field of oilfield drilling tools, in particular to a drill rod for oil development. Background Art

[0002] Petroleum resources are a non-renewable resource. With the increase in the efficiency and potential control of oil production, oilfield drilling and well repair operations are gradually extending to deeper and more complex geology. There are more and more inclined wells, horizontal wells and measure wells. With the increase in inclined wells, horizontal wells and drilling under complex geological environment conditions, the bottom hole assembly requires a large number of weighted drill pipes to meet the needs of drilling production.

[0003] Oil drill pipe is an indispensable and important tool in oil drilling operations. Under normal geological conditions, the depth of oil drilling can reach several thousand meters, and in special areas it can reach tens of thousands of meters. The drill pipe used for oil drilling is usually about 10 meters long, so the drill pipe used for oil drilling is usually relatively long. As the drilling depth increases, the drill pipe will be connected. At present, with the continuous development of oil exploration technology, drill bits are constantly being updated. There are roller drill bits, diamond composite drill bits, etc., with a wide variety. In order to meet the needs of oil drilling in different soil layers, different drill bits are needed. Drill bits with different functions require different drill pipes, which puts higher and higher requirements on drill pipes. Not only does it require the drill pipe to be easily connected to the drill bit, but it also requires the drill pipe to be easily connected and disassembled to other drill pipes.

[0004] Existing drill pipes for oil development have certain drawbacks when in use. Most of the drill pipes currently used for oil development are spliced ​​by threaded matching, lacking further fixed limiting measures. When the drill pipe reaches a certain depth, the connecting threads of the drill pipe will be subjected to greater internal and external pressure and shear force, and the threaded connection is prone to failure, causing the drill pipe to break, affecting the actual production efficiency of oil development. Utility Model Content

[0005] The utility model aims to provide a drill pipe for oil development, which solves the problem that the existing drill pipes are only connected by thread and are prone to breakage when the connecting threads of the drill pipes are subjected to large internal and external pressures and shearing forces.

[0006] The technical solution adopted by the utility model is that a drill pipe for oil development comprises a first drill pipe and a second drill pipe, one end of the first drill pipe is sleeved with a first connecting shaft, one end of the second drill pipe is sleeved with a second connecting shaft, one end of the first connecting shaft close to the second drill pipe is fixedly connected with a connecting head, the connecting head is threadedly connected with a nut, the nut is sleeved on the second drill pipe, the first connecting shaft and the second connecting shaft are connected by two groups of symmetrically arranged fixing components, and a limiting component is arranged between the first drill pipe and the second drill pipe.

[0007] The utility model is also characterized in that:

[0008] A fixing block is sleeved on the second drill rod, and the fixing block is arranged inside the nut.

[0009] An inclined surface is provided at one end of the fixing block close to the connecting head, and the angle between the inclined surface and the side wall of the second drill rod is an acute angle. An end of the inclined surface away from the side wall of the second drill rod is connected to a vertical surface, and the vertical surface is vertically arranged to the side wall of the second drill rod. The fixing block cooperates with the connecting head.

[0010] Each set of fixing components includes two fixing seats, and connecting grooves are provided at the opposite ends of the two fixing seats. A connecting block is clamped in each connecting groove, and the two connecting blocks are connected by a telescopic rod. One of the fixing seats is arranged on the side wall of the first connecting shaft, and the other fixing seat is arranged on the side wall of the second connecting shaft.

[0011] The limiting assembly includes an installation groove embedded in the side wall of the second drill rod, a clamping block is slidably connected in the installation groove, the bottom end of the clamping block is connected to one end of the spring, the other end of the spring is connected to the inner bottom of the installation groove, and the clamping block cooperates with a slot hole set on the inner wall of the first drill rod.

[0012] The beneficial effects of the utility model are:

[0013] () The utility model oil development drill pipe, by setting a fixing assembly, makes the connection between the first drill pipe and the second drill pipe more firmly. When the drill pipe reaches a certain depth, even if the connection between the first drill pipe and the second drill pipe is subjected to greater internal and external pressure and shear force, it can be stabilized by the fixing assembly, thereby preventing the drill pipe from breaking;

[0014] (2) The oil development drill pipe of the utility model can not only seal the connection between the first drill pipe and the second drill pipe, but also tighten and limit the first drill pipe and the second drill pipe by providing a connecting head and a nut that cooperate with each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the drill pipe for oil development of the utility model;

[0016] Figure 2 This is a schematic diagram of the overall structure of the drill pipe for oil development of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the fixed assembly in the drill pipe for oil development of the utility model;

[0018] Figure 4 This is a cross-sectional view of a drill pipe for oil development according to the utility model;

[0019] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0020] Figure 6 for Figure 4 Schematic diagram of the enlarged structure at point B in the middle.

[0021] In the figure, 1. the first drill rod, 2. the first connecting shaft, 3. the second drill rod, 4. the second connecting shaft, 5. the fixing assembly, 6. the fixing seat, 7. the connecting groove, 8. the connecting block, 9. the telescopic rod, 10. the connecting head, 11. the nut, 12. the fixing block, 13. the limiting assembly, 14. the mounting groove, 15. the clamping block, 16. the spring, 17. the slot hole. DETAILED DESCRIPTION

[0022] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0023] Example 1

[0024] The utility model of a drill pipe for oil development has a structure as follows Figure 1 and Figure 2 As shown, it includes a first drill rod 1 and a second drill rod 3, the end of the second drill rod 3 is sleeved inside the first drill rod 1, a limiting assembly 13 is arranged between the first drill rod 1 and the second drill rod 3, one end of the first drill rod 1 is sleeved with a first connecting shaft 2, the outer wall of the second drill rod 3 close to the first drill rod 1 is sleeved with a second connecting shaft 4, the first connecting shaft 2 and the second connecting shaft 4 are connected by two groups of symmetrically arranged fixing assemblies 5, the end of the first connecting shaft 2 close to the second drill rod 3 is fixedly connected with a connecting head 10, the connecting head 10 is sleeved on the outer wall of the second drill rod 3, the connecting head 10 is threadedly connected with a nut 11, the nut 11 is sleeved on the second drill rod 3, and the connection between the first drill rod 1 and the second drill rod 3 can be further limited by the setting of the limiting assembly 13, so that the connection between the first drill rod 1 and the second drill rod 3 is more secure.

[0025] Example 2

[0026] On the basis of Example 1, Figure 3 As shown, each set of fixing components 5 includes two fixing seats 6, and the two fixing seats 6 are provided with connecting grooves 7 at the opposite ends, and a connecting block 8 is clamped in each connecting groove 7. The two connecting blocks 8 are connected by a telescopic rod 9, wherein one fixing seat 6 is arranged on the side wall of the first connecting shaft 2, and the other fixing seat 6 is arranged on the side wall of the second connecting shaft 4. The telescopic rod 9 includes a first rod and a second rod, and the first rod is sleeved inside the second rod, and the inner wall of the first rod is connected to one end of a tension spring, and the other end of the tension spring is connected to the inner wall of the second rod. When in use, one of the connecting blocks 8 is fixedly installed inside the connecting groove 7 arranged on the second drill rod 3, and then the other connecting block 8 is pulled to clamp it inside the connecting groove 7 arranged on the first drill rod 100. Due to the tension spring arranged inside the telescopic rod 9, its tension makes the connection between the first drill rod 1 and the second drill rod 3 more tightened.

[0027] like Figure 4 and Figure 5 As shown, a fixing block 12 is sleeved on the second drill rod 3, and the fixing block 12 is arranged inside the nut 11, that is, the end of the nut 11 away from the connector 10 is arranged between the fixing block 12 and the second connecting shaft 4, so as to limit the position of the nut 11, and an inclined surface A is arranged at one end of the fixing block 12 close to the connector 10, and the angle between the inclined surface A and the side wall of the second drill rod 3 is an acute angle, and the end of the inclined surface A away from the side wall of the second drill rod 3 is connected to a vertical surface, and the vertical surface is arranged vertically to the side wall of the second drill rod 3, and the connector 10 is close to the fixing block 12. The interior of one end is set as a slope B, the inclination of the slope A is consistent with that of the slope B and they cooperate with each other, and the fixing block 12 cooperates with the connecting head 10. When in use, during the process of rotating the nut 11, the nut 11 is threadedly connected with the connecting head 10, and the fixing block 12 and the connecting head 10 are gradually approached, so that the first drill rod 1 and the second drill rod 3 are gradually approached until the end of the connecting head 10 contacts the vertical surface of the fixing block 12, and then the rotation of the nut 11 is stopped. The nut 11 can seal the interface between the first drill rod 1 and the second drill rod 3.

[0028] Example 3

[0029] On the basis of Example 2, Figure 6 As shown, the limit assembly includes a mounting groove 14 embedded in the side wall of the second drill rod 3, and a block 15 is slidably connected in the mounting groove 14. The block 15 can slide along the inner wall of the mounting groove 14, and the bottom end of the block 15 is connected to one end of a spring 16, and the other end of the spring 16 is connected to the inner bottom of the mounting groove 14. The spring 16 is used to provide support for the block 15. The block 15 cooperates with a slot 17 set on the inner wall of the first drill rod 1. Even if there is a problem with the threaded connection between the nut 11 and the connector 10, the limit assembly can fix and limit the first drill rod and the second drill rod. During installation, the front end of the second drill rod 3 is slid into the interior of the first drill rod 1. While sliding, the clamping block 15 is slidably connected to the interior of the installation groove 14 due to the squeezing force of the inner wall of the first drill rod 1. When the clamping block 15 passes through the slot hole 17 set on the inner wall of the first drill rod 1, the external squeezing force disappears and under the action of the elastic force of the spring 16, the clamping block 15 is clamped into the inside of the slot hole 17, thereby further fixing the first drill rod 1 and the second drill rod 3.

[0030] The working principle of the drill rod for oil development of the utility model is as follows: the end of the second drill rod 3 is sleeved inside the first drill rod 1, the nut 11 is threadedly connected with the connecting head 10, and the nut 11 is rotated to make the first drill rod 1 approach the second drill rod 3. When the end of the connecting head 10 contacts the vertical surface of the fixing block 12, the rotation of the nut 11 is stopped, and the fixing block 12 limits the first drill rod 1. At this time, the clamping block 15 just moves into the slot 17 for clamping, so as to further fix the first drill rod 1 and the second drill rod 3. Then one of the connecting blocks 8 is installed in the connecting groove 7 on the fixing seat 6 connected to the second connecting shaft 4, and the other connecting block 8 is pulled into the connecting groove 7 on the fixing seat 6 connected to the first connecting shaft 2 for clamping. Under the action of the tension spring arranged inside the telescopic rod 9, the connection between the first drill rod 1 and the second drill rod 3 is tightened.

Claims

1. A drill pipe for oil development, comprising a first drill pipe (1) and a second drill pipe (3), characterized in that: A first connecting shaft (2) is sleeved on one end of the first drill rod (1), a second connecting shaft (4) is sleeved on the outer wall of the second drill rod (3), a connecting head (10) is fixedly connected to one end of the first connecting shaft (2) close to the second drill rod (3), a nut (11) is threadedly connected to the connecting head (10), and the nut (11) is sleeved on the second drill rod (3), the first connecting shaft (2) and the second connecting shaft (4) are connected by two groups of symmetrically arranged fixing components (5), and a limiting component (13) is arranged between the first drill rod (1) and the second drill rod (3).

2. The drill pipe for oil development according to claim 1, characterized in that: A fixing block (12) is sleeved on the second drill rod (3), and the fixing block (12) is arranged inside the nut (11).

3. The drill pipe for oil development according to claim 2, characterized in that: An inclined surface is provided at one end of the fixing block (12) close to the connector (10), and the angle between the inclined surface and the side wall of the second drill rod (3) is an acute angle. An end of the inclined surface away from the side wall of the second drill rod (3) is connected to a vertical surface, and the vertical surface is vertically arranged on the side wall of the second drill rod (3). The fixing block (12) cooperates with the connector (10).

4. The drill pipe for oil development according to claim 1, characterized in that: Each group of the fixing components (5) comprises two fixing seats (6), and the two fixing seats (6) are provided with connecting grooves (7) at the ends facing away from each other, and a connecting block (8) is clamped in each connecting groove (7), and the two connecting blocks (8) are connected by a telescopic rod (9), wherein one of the fixing seats (6) is arranged on the side wall of the first connecting shaft (2), and the other fixing seat (6) is arranged on the side wall of the second connecting shaft (4).

5. The drill pipe for oil development according to claim 1, characterized in that: The limit assembly comprises a mounting groove (14) embedded in the side wall of the second drill rod (3), a clamping block (15) is slidably connected in the mounting groove (14), the bottom end of the clamping block (15) is connected to one end of a spring (16), the other end of the spring (16) is connected to the inner bottom of the mounting groove (14), and the clamping block (15) cooperates with a slot hole (17) arranged on the inner wall of the first drill rod (1).

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