Light drilling pump pry based on hydraulic motor

Abstract

The light drilling pump skid based on the hydraulic motor comprises a large base, a crankshaft direct-drive drilling pump is arranged on the large base, the hydraulic motor is coaxially connected to a crankshaft of the drilling pump, and a hydraulic motor body is fixed to a rack of the drilling pump through a connecting disc. According to the light drilling pump skid based on the hydraulic motor, the structural design thought of a conventional pump skid is broken through, the small-size and large-torque hydraulic motor is adopted to directly drive a drilling pump crankshaft, and the problems that due to the arrangement of a transmission link, the weight is large, the boundary dimension is large, and the operation and maintenance link is complex are solved; meanwhile, the crankshaft direct-drive drilling pump is compact in structure, high in reliability and high in transmission efficiency, and the overall reliability and the long service life of the pump skid are guaranteed. And the device has very strong practical significance in the aspects of promoting technical development of drilling equipment and upgrading and updating of drilling pump products.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of oil and gas production equipment, and particularly relates to a light drilling pump sled based on a hydraulic motor. BACKGROUND

[0002] Drilling pumps are known as the "heart" of drilling rigs, and drilling pump sleds with good performance parameters, light weight and small size have obvious advantages in application. For example, in the nearly 100-year development process of drilling pumps, three-cylinder drilling pumps with better comprehensive indicators have rapidly and widely replaced double-cylinder drilling pumps, and have extended to crankshaft direct-drive drilling pumps without conventional drilling pump input shafts. Subsequently, two types of pump sleds have been extended: one is a type in which a motor drives a drilling pump (crankshaft) through a reducer, and the other is a type in which a motor directly drives a drilling pump (input shaft). The two types are designed from two aspects: single-pump structure optimization by canceling the input shaft of the drilling pump and pump sled transmission optimization by canceling the mechanical transmission link. In order to continuously meet the urgent needs of oil and gas field operations for pump sled optimization of pump sled weight, external dimensions and reduction of maintenance points, it is necessary to have a pump sled structure in which a small-volume, large-torque power device directly drives a drilling pump crankshaft. By adopting crankshaft direct-drive drilling pumps and canceling transmission devices, the structural compactness of the drilling pump sled is greatly improved, and the weight and external dimensions of the pump sled are reduced.

[0003] Therefore, it is necessary to have a light-weight, small-volume, good-load-performance, good-regulation-performance and simple-operation-maintenance-link light drilling pump sled based on a hydraulic motor. SUMMARY

[0004] The present application aims to provide a light drilling pump sled based on a hydraulic motor, which solves the problems of complex transmission links, heavy weight, large external dimensions and complex operation and maintenance of existing drilling pump sleds.

[0005] The technical scheme adopted by the present application is as follows: a light drilling pump sled based on a hydraulic motor, comprising a large base, a crankshaft direct-drive drilling pump is arranged on the large base, a hydraulic motor is coaxially connected to the crankshaft of the drilling pump, and the hydraulic motor body is fixed to the frame of the drilling pump through a connecting disc.

[0006] The present application is also characterized in that,

[0007] A main bearing seat is fixed to the frame through bolts I, the crankshaft is connected to the main bearing seat through a bearing, and a crankshaft external spline is arranged at the position where the crankshaft is connected to the hydraulic motor.

[0008] The hydraulic motor comprises a hydraulic motor shell, a hydraulic motor internal spline that matches the crankshaft external spline is arranged in the hydraulic motor shell, an installation through hole is arranged on the hydraulic motor shell, and a bolt III that is fixedly connected to the connecting disc is arranged in the installation through hole.

[0009] A through hole is provided in the center of the connecting plate to pass through the crankshaft. A circle of bolt holes and a circle of threaded holes corresponding one-to-one with bolts III are evenly spaced along the circumference of the connecting plate outside the through hole. Bolts II are fixedly connected to the main bearing seat.

[0010] A countersunk hole that is adapted to the size of the bolt 1 head is opened at one end of the connecting plate close to the main bearing seat.

[0011] The drilling pump is fixed on the large base by bolt IV.

[0012] The beneficial effects of the present invention are as follows: the lightweight drilling pump skid based on a hydraulic motor breaks through conventional pump skid structural design concepts by using a small, high-torque hydraulic motor to directly drive the drilling pump crankshaft. This overcomes the problems of heavy weight, large dimensions, and complex operation and maintenance associated with the installation of a transmission link. Simultaneously, the combination of a compact, highly reliable, and highly efficient crankshaft-driven drilling pump ensures the overall reliability and long service life of the pump skid. This has significant practical significance in promoting the development of drilling equipment technology and the upgrading of drilling pump products. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a front view of a lightweight drilling pump skid based on a hydraulic motor according to the present invention;

[0014] Figure 2 is a top view of a lightweight drilling pump skid based on a hydraulic motor according to the present invention;

[0015] Figure 3 yes Figure 2 A partial enlarged schematic diagram of area A in the middle;

[0016] Figure 4 It is a structural schematic diagram of a hydraulic motor in a light drilling pump skid based on a hydraulic motor of the present invention;

[0017] Figure 5 This is a schematic structural diagram of a connecting plate in a light drilling pump skid based on a hydraulic motor according to the present invention;

[0018] Figure 6 This is a schematic diagram of the back structure of the connecting plate in the light drilling pump skid based on the hydraulic motor of the present invention;

[0019] Figure 7 yes Figure 6 Schematic diagram of the BB direction cross section.

[0020] In the figure, 1. large base; 2. drilling pump, 21. crankshaft, 22. crankshaft external spline, 23. main bearing seat, 24. frame, 25. bolt I; 3. hydraulic motor, 31. hydraulic motor internal spline, 32. hydraulic motor housing, 33. mounting hole; 4. connecting plate, 41. bolt hole, 42. threaded hole, 43. countersunk hole; 5. bolt II; 6. bolt III; 7. bolt IV. DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1

[0023] The present invention provides a light drilling pump skid based on a hydraulic motor, such as Figures 1 to 3 As shown, it includes a large base 1 on which a crankshaft direct-drive drilling pump 2 is provided. A hydraulic motor 3 is coaxially connected to the crankshaft 21 of the drilling pump 2 , and the body of the hydraulic motor 3 is fixed to the frame 24 of the drilling pump 2 through a connecting plate 4 .

[0024] Through the above-described approach, the hydraulic motor-based lightweight drilling pump skid of the present invention not only meets the urgent need of oil and gas field operations to optimize the overall weight, dimensions, and reduce maintenance points of the drilling pump skid, but also breaks through the conventional pump skid structural design concept, using a small, high-torque hydraulic motor 3 to directly drive the drilling pump crankshaft 21. The pump skid structure adopted by the present invention, in which the hydraulic motor 3 directly drives the drilling pump crankshaft 21, overcomes the problems of heavy weight, large dimensions, and complex operation and maintenance caused by the installation of a transmission link. At the same time, it is matched with the compact and highly reliable crankshaft direct-drive drilling pump 2, ensuring the overall reliability and long service life of the pump skid. It has strong practical significance in promoting the development of drilling equipment technology and the upgrading of drilling pump products in my country.

[0025] Example 2

[0026] The present invention provides a light drilling pump skid based on a hydraulic motor, such as Figures 1 to 7 As shown, it includes a crankshaft direct-drive drilling pump 2, which is fixed to the large base 1 by bolts IV7. A hydraulic motor 3 is provided on one side of the drilling pump 2, and the hydraulic motor housing 32 is fixed to the frame 24 of the drilling pump through a connecting plate 4, realizing the overall assembly of the drilling pump skid.

[0027] The crankshaft 21 of the drilling pump is provided with a crankshaft outer spline 22 machined integrally with the crankshaft, the crankshaft outer spline 22 is provided with a connecting disc 4, the bolt through hole 41 of the connecting disc 4 is provided with a bolt II 5, the connecting disc 4 is connected and fixed with the main bearing seat 23, the main bearing seat 23 is fixed on the drilling pump rack 24 through a bolt I 25, the connection of the connecting disc 4 and the drilling pump 2 is completed; the head of the bolt I 25 is arranged in the sink hole 43 of the connecting disc, and the structure of the sink hole 43 can effectively reduce the axial size of the drilling pump sled.

[0028] The crankshaft outer spline 22 is provided with a hydraulic motor 3, the hydraulic motor 3 is provided with a hollow hydraulic motor inner spline 31, the hydraulic motor inner spline 31 is matched with the crankshaft outer spline 22, the power input connection is realized through the inner and outer spline matching, and the inner spline connection structure can obviously reduce the axial size when the hydraulic motor 3 is connected with the drilling pump 2; the hydraulic motor shell 32 is provided with a bolt III 6 through the mounting through hole 33, is connected with the threaded hole 42 of the connecting disc 4, the connection of the hydraulic motor 3 and the drilling pump 2 is completed, and the hydraulic motor 3 directly drives the drilling pump 2.

[0029] Embodiment 3

[0030] The application provides a light drilling pump sled based on a hydraulic motor, and the installation steps are:

[0031] 1) installation of the drilling pump 2: the drilling pump 2 is installed and fixed on the large base 1 through a bolt IV 7, the crankshaft 21 is provided with a crankshaft outer spline 22 on one side, and the main bearing seat 23 is fixed on the rack 24 of the drilling pump through a bolt I 25 on the side of the crankshaft outer spline 22;

[0032] 2) installation of the connecting disc 4: the connecting disc 4 is arranged on the side of the crankshaft outer spline 22, the bolt through hole 41 of the connecting disc 4 is provided with a bolt II 5, the connecting disc 4 is connected and fixed with the main bearing seat 23, and the connection of the connecting disc 4 and the drilling pump 2 is completed;

[0033] 3) installation of the hydraulic motor 3: the hydraulic motor 3 is provided with a hydraulic motor inner spline 31 matched with the crankshaft outer spline 22, the hydraulic motor shell 32 is provided with a bolt III 6 through the mounting through hole 33, is connected with the threaded hole 42 of the connecting disc 4, the connection of the hydraulic motor 3 and the drilling pump 2 is completed through the connecting disc 4, and the connection and fixation of the hydraulic motor 3 and the drilling pump 2 are realized.

[0034] The main structure of the light drilling pump sled based on the hydraulic motor is formed.

Claims

1. Lightweight drilling pump skid based on hydraulic motor, characterized by: The invention comprises a large base (1), on which a crankshaft direct-drive drilling pump (2) is arranged, a hydraulic motor (3) is coaxially connected to the crankshaft (21) of the drilling pump (2), and the hydraulic motor (3) body is fixed to the frame (24) of the drilling pump (2) via a connecting plate (4).

2. The light drilling pump skid based on a hydraulic motor according to claim 1, characterized in that: A main bearing seat (23) is fixed to the frame (24) by means of bolts 1 (25), and a crankshaft (21) is connected to the main bearing seat (23) via a bearing. A crankshaft external spline (22) is provided at a position where the crankshaft (21) is connected to the hydraulic motor (3).

3. The light drilling pump skid based on a hydraulic motor according to claim 2, characterized in that: The hydraulic motor (3) includes a hydraulic motor housing (32), wherein an internal spline (31) of the hydraulic motor is provided in the hydraulic motor housing (32) and matches with an external spline (22) of the crankshaft. A mounting hole (33) is provided in the hydraulic motor housing (32), and a bolt III (6) fixedly connected to the connecting plate (4) is provided in the mounting hole (33).

4. The light drilling pump skid based on a hydraulic motor according to claim 3, characterized in that: A through hole is provided at the center of the connecting plate (4) for passing the crankshaft (21). A circle of bolt through holes (41) and a circle of threaded holes (42) corresponding to the bolts III (6) are evenly spaced along the circumference of the connecting plate (4) at positions outside the through hole. Bolts II (5) fixedly connected to the main bearing seat (23) are provided in the bolt through holes (41).

5. The light drilling pump skid based on a hydraulic motor according to claim 4, characterized in that: The connecting plate (4) is provided with a sink hole (43) at one end close to the main bearing seat (23) and the size of the sink hole (43) is adapted to the head of the bolt I (25).

6. The light drilling pump skid based on a hydraulic motor according to claim 1, characterized in that: The drilling pump (2) is fixedly mounted on the large base (1) via bolts IV (7).

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