Quickly-assembled combined piston rod of drilling pump

Abstract

The utility model relates to the related technical field of well drilling, and provides a fast-assembly combined piston rod of a well drilling pump, which comprises a piston and a main sleeve, the piston is arranged outside the main sleeve, a butt joint fixing component is arranged between the piston and the main sleeve, a tailstock is arranged outside the main sleeve, and a splicing component is arranged between the tailstock and the main sleeve. The butt joint fixing assembly comprises a plurality of positioning grooves, the positioning grooves are all formed in the surface of the piston, a pressing base is connected to one end in each positioning groove in an inserted mode, a center rod is arranged on the surface of each pressing base, and one end of each center rod penetrates through the piston to be inserted into the main sleeve. By means of the technical scheme, the problems that in the prior art, the whole piston replacement process of an existing piston rod is tedious, the steps are complex, the labor intensity is high, and therefore piston replacement is a main obstacle seriously restricting the field use efficiency of a drilling pump at present are solved.

Description

Technical Field

[0001] The utility model relates to the technical field related to drilling, and in particular to a quick-assembly combined piston rod of a drilling pump. Background Art

[0002] Drilling pumps are crucial components of oil and gas drilling equipment. Their function is to provide pressurized drilling mud during the drilling process, allowing it to carry bottomhole cuttings back to the surface and provide a continuous flow of mud circulation power for continuous drilling. The drilling pump piston rod is a critical component of the drilling pump. Since the piston mounted on the piston rod is the most frequently replaced vulnerable part, piston replacement is a crucial maintenance component for the normal operation of the drilling pump.

[0003] The piston needs to be replaced frequently. The entire piston replacement process of the current piston rod is cumbersome, the steps are complicated, and the labor intensity is high. Therefore, piston replacement is the main obstacle that seriously restricts the on-site use efficiency of drilling pumps. Utility Model Content

[0004] The utility model provides a drilling pump quick-assembly piston rod, which solves the problem that the entire piston replacement process of the current piston rod in the related art is cumbersome, with complex steps and high labor intensity. Therefore, piston replacement is currently a major obstacle that seriously restricts the on-site use efficiency of drilling pumps.

[0005] The technical solution of the utility model is as follows:

[0006] A piston and a main sleeve, wherein the piston is arranged outside the main sleeve;

[0007] a docking and fixing assembly, the docking and fixing assembly being arranged between the piston and the main sleeve;

[0008] A tailstock and a splicing assembly, wherein the tailstock is arranged outside the main sleeve, and the splicing assembly is arranged between the tailstock and the main sleeve;

[0009] The docking and fixing assembly includes a plurality of positioning grooves, each of which is provided on the surface of the piston. A compression seat is inserted and connected at one end of the positioning groove. A center rod is provided on the surface of the compression seat. One end of the center rod passes through the piston and is inserted into the main sleeve.

[0010] As a further technical solution, an inner sleeve is installed in the main sleeve, and several insertion rods are provided on the surface of the inner sleeve. The insertion rods are respectively inserted into the center rod and the inner surface of the main sleeve. A stud is provided at one end of the center rod, and a fixing nut is screwed on the stud.

[0011] As a further technical solution, the splicing assembly includes a pair of splicing columns, which are inserted into the main sleeve. A pair of grooves are opened on the surface of the main sleeve. A driving bolt is rotatably connected in the groove, and the outside of the driving bolt is connected to an insert through threaded fitting.

[0012] As a further technical solution, a pair of limiting grooves are provided at opposite ends of the inner surface of the main sleeve, the insert is inserted into the limiting grooves, a circular hole is provided on the inner surface of the limiting groove, and a threaded groove is provided at the upper end of the driving bolt.

[0013] As a further technical solution, a blocking rod is screwed into the threaded groove, a slot is provided at one end of the splicing column, a pair of splicing rods are provided on the surface of the tailstock, and the splicing rods are inserted into the slot.

[0014] As a further technical solution, pin holes are provided on the inner surface of the slot and the surface of the splicing rod, positioning pins are inserted into the pin holes, and one end of the positioning pin is connected to an internal threaded frame through threaded engagement.

[0015] As a further technical solution, the groove, the insert and the limiting groove are all rectangular structures.

[0016] As a further technical solution, the cross section of the splicing column is a semicircular structure, and both sides of the splicing column are convex structures.

[0017] As a further technical solution, the driving bolt and the upper end of the blocking rod are both provided with a hexagonal groove, and the diameter of the blocking rod matches the inner diameter of the circular hole.

[0018] As a further technical solution, the lower end of the internal threaded frame is a polygonal structural surface.

[0019] The working principle and beneficial effects of the utility model are as follows:

[0020] 1. The utility model is provided with a docking fixing assembly. Through the interaction of the clamping seat, the center rod, the insert rod, the stud and the fixing nut, the clamping seat cooperates with the main sleeve and fits on both sides of the piston at the same time, which can firmly clamp the piston without loosening or rotation. The connection is tight and stable.

[0021] 2. The utility model is provided with a splicing assembly. Through the interaction of structures such as the splicing column, driving bolt, insert, threaded groove, blocking rod, splicing rod and positioning pin, the tailstock can be connected to the main sleeve through two splicing columns, and the connection is fixed by embedding. The connection is firm and there will be no looseness. The overall structural connection is convenient for disassembly and the piston can be quickly disassembled and replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0023] Figure 1 This is a schematic diagram of the structure of the utility model;

[0024] Figure 2 This is the axonometric drawing of the utility model;

[0025] Figure 3 This is an axonometric sectional view of the utility model;

[0026] Figure 4 This is an axonometric cross-sectional view from another perspective of the present invention;

[0027] Figure 5 For this utility model Figure 3 A partial enlarged view of part A;

[0028] Figure 6 For this utility model Figure 3 A partial enlarged view of part B;

[0029] In the figure: 1. Piston; 2. Main sleeve; 3. Tail stock; 4. Docking fixing assembly; 4-1. Positioning groove; 4-2. Pressing seat; 4-3. Center rod; 4-4. Inner sleeve; 4-5. Insert rod; 4-6. Stud; 4-7. Fixing nut; 5. Splicing assembly; 5-1. Splicing column; 5-2. Groove; 5-3. Drive bolt; 5-4. Insert; 5-5. Limiting groove; 5-6. Round hole; 5-7. Threaded groove; 5-8. Blocking rod; 5-9. Slot; 5-10. Splicing rod; 5-11. Pin hole; 5-12. Positioning pin; 5-13. Internal thread rack; 6. Hexagonal groove. DETAILED DESCRIPTION

[0030] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] like Figures 1 to 6 As shown, this embodiment proposes a drilling pump quick assembly piston rod, including

[0032] A piston 1 and a main sleeve 2, wherein the piston 1 is arranged outside the main sleeve 2;

[0033] The docking fixing assembly 4 is arranged between the piston 1 and the main sleeve 2;

[0034] The tailstock 3 and the splicing assembly 5 are arranged outside the main sleeve 2, and the splicing assembly 5 is arranged between the tailstock 3 and the main sleeve 2;

[0035] The docking and fixing assembly 4 includes a plurality of positioning grooves 4-1, which are all provided on the surface of the piston 1. A compression seat 4-2 is inserted into one end of the positioning groove 4-1, and a center rod 4-3 is provided on the surface of the compression seat 4-2. One end of the center rod 4-3 passes through the piston 1 and is inserted into the main sleeve 2. An inner sleeve 4-4 is installed in the main sleeve 2. A plurality of insertion rods 4-5 are provided on the surface of the inner sleeve 4-4. The insertion rods 4-5 are respectively inserted into the center rod 4-3 and the inner surface of the main sleeve 2. A stud 4-6 is provided at one end of the center rod 4-3, and a fixing nut 4-7 is screwed on the stud 4-6.

[0036] In this embodiment, in order to achieve the effect of rapid installation and fixation of the piston 1, a docking and fixing component 4 is designed, a plurality of positioning grooves 4-1 are opened in the piston 1, the piston 1 is sleeved on the main sleeve 2 through the positioning grooves 4-1, and a clamping seat 4-2 is inserted on the outside of the piston 1, the clamping seat 4-2 cooperates with the main sleeve 2 to clamp the piston 1, and a center rod 4-3 and a stud 4-6 are provided on the surface of the clamping seat 4-2. The center rod 4-3 passes through the piston 1 and is inserted into the inside of the main sleeve 2. The stud 4-6 is located in the main sleeve 2, and an inner sleeve 4-4 is sleeved on the center rod 4-3. A plurality of insertion rods 4-5 are provided on the surface of the inner sleeve 4-4. The insertion rods 4-5 are inserted into the center rod 4-3 and the inner surface of the main sleeve 2 at the same time, and a fixing nut 4-7 is screwed on the stud 4-6. The center rod 4-3 can be tightened by the fixing nut 4-7, and the piston 1 can be firmly clamped between the main sleeve 2 and the clamping seat 4-2 in cooperation with the inner sleeve 4-4.

[0037] Furthermore, the splicing assembly 5 includes a pair of splicing columns 5-1, which are inserted into the main sleeve 2. A pair of grooves 5-2 are provided on the surface of the main sleeve 2. A driving bolt 5-3 is rotatably connected in the groove 5-2. The outside of the driving bolt 5-3 is connected to an insert 5-4 through a threaded fit. A pair of limiting grooves 5-5 are provided at opposite ends of the inner surface of the main sleeve 2. The insert 5-4 is inserted into the limiting groove 5-5. A round hole 5-6 is provided on the inner surface of the limiting groove 5-5. The driving bolt 5- 3 is provided with a thread groove 5-7, and a blocking rod 5-8 is screwed into the thread groove 5-7. A slot 5-9 is provided at one end of the splicing column 5-1. A pair of splicing rods 5-10 are provided on the surface of the tailstock 3. The splicing rods 5-10 are inserted into the slots 5-9. Pin holes 5-11 are provided on the inner surface of the slots 5-9 and the surface of the splicing rods 5-10. A positioning pin 5-12 is inserted into the pin hole 5-11. One end of the positioning pin 5-12 is connected to an internal threaded frame 5-13 through threaded cooperation.

[0038] In this embodiment, in order to achieve the effect of connecting the tailstock 3 with the main sleeve 2, a splicing component 5 is designed. Two splicing columns 5-1 are inserted and connected in the main sleeve 2. Two grooves 5-2 are provided on the surface of the splicing column 5-1. A limiting groove 5-5 is provided at a position opposite to the groove 5-2 on the inner surface of the main sleeve 2. A driving bolt 5-3 and an insert 5-4 are rotated in the groove 5-2. The driving bolt 5-3 is turned to control the insert 5-4 to move up and down. The insert 5-4 can be inserted into the limiting groove 5-5, and the splicing column 5-1 can be fixedly connected to the inner sleeve 4-4. A threaded groove 5-7 is provided on the upper end of the driving bolt 5-3 and a blocking rod 5-8 is screwed inside. The limiting groove 5- 5 is provided with a circular hole 5-6 at the top, and a blocking rod 5-8 is used to block the circular hole 5-6, close the limit groove 5-5 and the groove 5-2, and prevent lubricating oil from entering and causing the insert 5-4 to loosen. A slot 5-9 is provided at one end of the two splicing columns 5-1, and two splicing rods 5-10 are provided on the surface of the tailstock 3 and inserted into the slot 5-9. Two pin holes 5-11 are provided on the inner surface of the slot 5-9 and the surface of the splicing rod 5-10. A positioning pin 5-12 and an internal threaded frame 5-13 are inserted into the pin hole 5-11. The internal threaded frame 5-13 is screwed to the positioning pin 5-12. The positioning pin 5-12 can be tightened to press the splicing rod 5-10 and the slot 5-9 tightly.

[0039] Furthermore, the groove 5-2, the insert 5-4 and the limiting groove 5-5 are all rectangular structures.

[0040] In this embodiment, the rectangular structure allows the insert 5 - 4 to move vertically up and down while maintaining a constant angle, while fitting into the groove 5 - 2 and the limiting groove 5 - 5 .

[0041] Furthermore, the cross section of the splicing column 5-1 is a semicircular structure, and both sides of the splicing column 5-1 are convex structures.

[0042] In this embodiment, the two semicircular splicing columns 5 - 1 present a cylindrical structure after being spliced, and the raised portion plays a positioning role during installation to ensure the insertion position of the splicing column 5 - 1.

[0043] Furthermore, a hexagonal groove 6 is provided at the upper end of the driving bolt 5-3 and the blocking rod 5-8, and the diameter of the blocking rod 5-8 matches the inner diameter of the circular hole 5-6.

[0044] In this embodiment, the hexagonal groove 6 is provided to facilitate the use of a hexagonal wrench to tighten the driving bolt 5-3 and the blocking rod 5-8.

[0045] Furthermore, the lower end of the internal thread frame 5-13 is a polygonal structural surface.

[0046] In this embodiment, the polygonal structure makes it convenient to use a wrench to clamp and screw the internal thread frame 5-13.

[0047] When the piston 1 needs to be replaced, put the piston 1 on the main sleeve 2, take out the pressing seat 4-2 and insert it into the positioning groove 4-1 of the piston 1. At the same time, the center rod 4-3 passes through the piston 1 and the main sleeve 2, put the inner sleeve 4-4 into the other end of the main sleeve 2 and screw the fixing nut 4-7 on the stud 4-6, press the inner sleeve 4-4 and tighten the center rod 4-3 at the same time to complete the fixation of the piston 1. After the two splicing columns 5-1 are spliced, they are inserted into the splicing rods 5-10 of the tailstock 3 through the slot 5-9. The positioning pin is inserted into the tailstock 3. 5-12 and the internal thread frame 5-13 are inserted into the two ends of the positioning pin 5-12, and then the internal thread frame 5-13 is screwed to connect and fix with the positioning pin 5-12, and then the splicing column 5-1 is inserted into the main sleeve 2, and positioned by the raised part. After it is fully inserted, insert the hexagonal wrench into the round hole 5-6 and enter the hexagonal groove 6, and then screw the driving bolt 5-3 to drive the insert 5-4 to move upward until it is tightly inserted into the limit groove 5-5, and finally screw the blocking rod 5-8 into the threaded groove 5-7.

[0048] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A drilling pump quick-assembly piston rod, characterized in that: include A piston (1) and a main sleeve (2), wherein the piston (1) is arranged outside the main sleeve (2); a docking fixing assembly (4), the docking fixing assembly (4) being arranged between the piston (1) and the main sleeve (2); A tailstock (3) and a splicing assembly (5), wherein the tailstock (3) is arranged outside the main sleeve (2), and the splicing assembly (5) is arranged between the tailstock (3) and the main sleeve (2); The docking fixing assembly (4) comprises a plurality of positioning grooves (4-1), each of the positioning grooves (4-1) being provided on the surface of the piston (1), a pressing seat (4-2) being inserted and connected at one end in the positioning groove (4-1), a center rod (4-3) being provided on the surface of the pressing seat (4-2), and one end of the center rod (4-3) passing through the piston (1) and being inserted in the main sleeve (2).

2. The drilling pump quick-assembly piston rod according to claim 1, characterized in that: An inner sleeve (4-4) is installed in the main sleeve (2), and a plurality of insertion rods (4-5) are provided on the surface of the inner sleeve (4-4). The insertion rods (4-5) are respectively inserted into the central rod (4-3) and the inner surface of the main sleeve (2). A stud (4-6) is provided at one end of the central rod (4-3), and a fixing nut (4-7) is screwed onto the stud (4-6).

3. The drilling pump quick-assembly piston rod according to claim 1, characterized in that: The splicing assembly (5) comprises a pair of splicing columns (5-1), each of the splicing columns (5-1) being inserted into the main sleeve (2), a pair of grooves (5-2) being provided on the surface of the main sleeve (2), a driving bolt (5-3) being rotatably connected in the grooves (5-2), and an insert (5-4) being connected to the outside of the driving bolt (5-3) through threaded engagement.

4. The drilling pump quick-assembly piston rod according to claim 3, characterized in that: A pair of limiting grooves (5-5) are provided at opposite ends of the inner surface of the main sleeve (2), the insert (5-4) is inserted into the limiting grooves (5-5), a circular hole (5-6) is provided on the inner surface of the limiting groove (5-5), and a threaded groove (5-7) is provided at the upper end of the driving bolt (5-3).

5. The drilling pump quick-assembly piston rod according to claim 4, characterized in that: A blocking rod (5-8) is screwed into the threaded groove (5-7), a slot (5-9) is provided at one end of the splicing column (5-1), and a pair of splicing rods (5-10) are provided on the surface of the tailstock (3), and the splicing rods (5-10) are inserted into the slots (5-9).

6. The drilling pump quick-assembly piston rod according to claim 5, characterized in that: The inner surface of the slot (5-9) and the surface of the splicing rod (5-10) are both provided with a pin hole (5-11), a positioning pin (5-12) is inserted into the pin hole (5-11), and one end of the positioning pin (5-12) is connected to an internal thread frame (5-13) through threaded engagement.

7. The drilling pump quick-assembly piston rod according to claim 4, characterized in that: The groove (5-2), the insert (5-4) and the limiting groove (5-5) are all rectangular structures.

8. The drilling pump quick-assembly piston rod according to claim 3, characterized in that: The cross section of the splicing column (5-1) is a semicircular structure, and both sides of the splicing column (5-1) are convex structures.

9. The drilling pump quick-assembly piston rod according to claim 5, characterized in that: The upper ends of the driving bolt (5-3) and the blocking rod (5-8) are both provided with hexagonal grooves (6), and the diameter of the blocking rod (5-8) matches the inner diameter of the circular hole (5-6).

10. The drilling pump quick-assembly piston rod according to claim 6, characterized in that: The lower end of the internal thread frame (5-13) is a polygonal structural surface.

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