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Sectional piston rod connecting structure of drilling pump

A connection structure, piston rod technology, applied in the direction of pump components, variable displacement pump components, components of pumping devices for elastic fluids, etc., can solve problems such as difficult disassembly and large torque values

Pending Publication Date: 2021-11-02
黄秀芳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] Because the piston rod is in contact with mud liquid and spray water during operation, and it is always under alternating load, but the internal thread of the first connecting device mentioned in Article 2 of the claim is connected with the external thread of the second rod, since there is no specified thread What is the torque value of the connection? Sometimes the torque value is too large. After a period of use, it must be difficult to disassemble

Method used

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  • Sectional piston rod connecting structure of drilling pump
  • Sectional piston rod connecting structure of drilling pump
  • Sectional piston rod connecting structure of drilling pump

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0035] The embodiments of the present invention are not limited to the following examples, and various changes made without departing from the gist of the present invention fall within the protection scope of the present invention.

[0036] see Figure 1 to Figure 5 , a segmented piston rod connection structure of a drilling pump in this embodiment, including a rear piston rod semi-finished product 1, a front piston rod semi-finished product 2, a rear piston rod finished product 3, a front piston rod finished product 4, a 16mm taper pin 5, and a spring washer 6. Nut 7, end face 1.1, inner hole 1.2, M27×2 internal thread 1.3, end face 2.1, outer circle 2.2, M27×2 outer thread 2.3, end face 3.1, outer circle 3.2, tapered hole surface 3.3, counterbore surface 3.4, Upper plane 3.5, lower plane 3.6, counterbore inner circle 3.7, end face 4.1, outer...

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Abstract

The invention discloses a sectional piston rod connecting structure of a drilling pump, and relates to the field of petroleum engineering equipment, in particular to the sectional piston rod connecting structure of the drilling pump. The connecting structure comprises a rear-section piston rod semi-finished product, a front-section piston rod semi-finished product, a rear-section piston rod finished product, a front-section piston rod finished product, a 16mm taper pin, a spring washer and a nut. According to the connecting structure, the purpose of replacing a piston without replacing a cylinder sleeve can be achieved, in addition, the connecting structure has the three advantages that when the sectional piston works, the end surface pushes a front-section piston rod, when the piston rod retreats backwards, the front-section piston rod is pulled backwards through the 16mm taper pin, and the service life of the sectional piston rod is long; and the repeated installation coaxiality precision of the outer circles and threads at the two ends of the sectional piston is high, the repeated installation parallelism precision of the front end surface and the rear end surface is high, and when the piston of the drilling pump is replaced, due to the fact that the threads M27*2 connected to the front-section piston rod and the rear-section piston rod are screwed together, no pre-tightening force exists, and the front-section piston rod and the rear-section piston rod are separated very easily.

Description

technical field [0001] The invention relates to the field of petroleum engineering equipment, in particular to a segmented piston rod connection structure of a drilling pump. Background technique [0002] In the hydraulic end of the drilling pump, the piston and the cylinder liner are a group of key components to realize the function of the drilling pump. Its working conditions are harsh, easy to wear, and need to be replaced frequently. They are usually called wearing parts. Under the same conditions of use, the service life of cylinder liner pistons of different qualities varies greatly. For example, the service life of pistons is as high as 1000 hours or more in the case of water-based mud work, and the service life is as low as only tens of hours. The low service life of the piston and cylinder liner increases the repair time of the pump. At the same time, the frequent disassembly and assembly of the cylinder liner and piston easily damages other parts of the drilling pu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B53/22F04B53/14F04B53/00
CPCF04B53/22F04B53/00F04B53/14F04B53/144
Inventor 黄秀芳
Owner 黄秀芳
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