CN210623062U

CN210623062U - Oil inlet device of choking oil pump

Info

Publication number: CN210623062U
Application number: CN201921659545.8U
Authority: CN
Inventors: 栾学玉; 易鲁川; 冯瑞
Original assignee: Shandong Sitong Petroleum Technology Development Co ltd
Current assignee: Shandong Sitong Petroleum Technology Development Co ltd
Priority date: 2019-10-01
Filing date: 2019-10-01
Publication date: 2020-05-26
Anticipated expiration: 2029-10-01

Abstract

The utility model provides a choked flow oil-well pump oil feed device, there are valve pocket, liquid outlet hole in the valve casing, the valve ball is placed in the valve pocket, the valve seat is placed in the hole of placeeing of valve casing, the upper portion of lower clutch and the sub-unit connection of valve casing, the diameter of valve ball is greater than the aperture of valve seat, the upper portion of valve casing sets up the cylinder, the cylinder in have a accepting hole, the cylinder on place the choked flow stopper, the upper clutch entangle the choked flow stopper with the cylinder after its lower part be connected with the valve casing, the cylinder and the upper clutch between form annular channel, the external diameter of choked flow stopper is greater than the upper portion internal diameter of upper clutch, the choked flow stopper is impressed by external force from the top down behind the accepting hole, the outer wall of choked flow stopper with the accepting hole cooperation fix the choked flow stopper in the accepting hole in the utility model discloses install under the pump barrel of oil-well pump, well liquid can not get into in the pump oil-well when the well, can prevent the pin tools from acting midway and ensure the successful downhole of the oil pumping pipe column.

Description

Oil inlet device of choking oil pump

Technical Field

The utility model relates to a device that oil field oil pumping well was used with the oil-well pump is supporting, is a choked flow oil-well pump oil feed device.

Background

Sometimes, a pin-type tool is put into an oil pumping pipe column, for example, a Chinese patent 200410039801.5 "tubing anchor", a sealing cylinder is fixed by an anti-moving pin, belongs to the pin-type tool, and is installed on an oil well pump. The tools have larger outer diameter and small difference with the inner diameter of the casing, and the tools walk in the casing like pistons when going down in the casing, because the casing is filled with well fluid, when the walking speed is higher, pressure difference is formed between two ends of a pin type tool with large diameter, namely the pressure of the lower end of the tool with large diameter is higher than that of the upper end, the lower end of the tool with large diameter is communicated with an oil pipe on a pump through an oil inlet valve of an oil well pump, namely high pressure formed when the tool with large diameter goes down the well quickly can be transmitted into the oil pipe on the pump, an oil pipe column is formed by connecting oil pipes with the length of more than 9 meters, the tool is lifted to be in a vertical state by an operating machine and is put into the well, after one oil pipe is put down, the other oil pipe is lifted to be in a vertical state by the operating machine and is connected with the oil pipe which has gone down the well, the oil pipe column has a pause state in the process, the pressure at the lower end of the tool is reduced, the pressure in the oil pipe on the pump can not be reduced under the action of an oil inlet valve on the oil well pump, so that a pressure difference is formed between the inside and the outside of the large-diameter pin tool, the pressure difference is increased along with the increase of the well descending depth, when the pressure difference is increased to exceed the bearing capacity of a pin on the pin tool, the pin on the pin tool can be sheared off, the middle action of the pin tool is realized, when the pin tool acts midway, the oil pumping pipe column can not be descended, and the oil pumping pipe column can not be descended to the designed position, so that the operation can not be successful if the pin tool acts midway, and the great economic loss is caused.

Disclosure of Invention

The utility model aims at designing a choked flow oil-well pump oil feed device, when making it have the oil-well pump tubular column of pin class instrument under, the internal pressure of pin class instrument is not higher than external pressure, prevents that the pin from being cut off, guarantees to pump oil pipe tubular column and goes into the well successfully.

The purpose of the utility model is realized like this: the upper joint is sleeved with the choke plug and the cylindrical barrel, the lower part of the upper joint is connected with the valve cover, an annular channel is formed between the cylindrical barrel and the upper joint, the lower part of the annular channel is communicated with the liquid outlet hole, the outer diameter of the flow blocking plug is larger than the inner diameter of the upper part of the upper joint, the flow blocking plug can block an upper channel of the upper joint under the action of buoyancy or the impact of liquid flow from bottom to top, and after the flow blocking plug is pressed into the receiving hole from top to bottom by external force, the outer wall of the flow blocking plug is matched with the receiving hole to fix the flow blocking plug in the receiving hole.

The utility model has the advantages that: the utility model discloses install under the pump barrel of oil-well pump, in the time of going into the well liquid can not get into the oil pipe on the pump, the internal pressure of the pin class instrument of connecting on the tubular column can not be higher than external pressure, and the pin on the pin class instrument can not cut off when going into the well, can prevent that pin class instrument from moving midway, guarantees that the oil pumping tubular column is gone into the well successfully.

Drawings

Fig. 1 is a structural diagram of the present invention.

Detailed Description

The following describes an embodiment of the present invention in detail with reference to fig. 1.

As shown in figure 1, the embodiment of the utility model comprises an upper joint 1, a flow blocking plug 2, a valve ball 4, a valve seat 5, a valve cover 6 and a lower joint 7, wherein the valve cover 6 is internally provided with a valve cavity 6-4 and a liquid outlet hole 6-3, the valve ball 4 is arranged in the valve cavity 6-4, the valve seat 5 is arranged in a placing hole of the valve cover 6, the upper end of the valve seat 5 is contacted with an inner shoulder of the valve cover 6, the upper part of the lower joint 7 is connected with the lower part of the valve cover 6, the upper end surface of the lower joint 7 is propped against the lower end surface of the valve seat 5, the diameter of the valve ball 4 is larger than that of the valve seat 5, the valve ball 4 is matched and sealed with the upper valve port of the valve seat 5, liquid can flow upwards through an inner hole of the valve seat 5, the valve cavity 6-4 and the liquid outlet hole 6-3, the liquid can not flow downwards, the upper part of the valve cover 6-1 is provided with a cylinder 6, the cylinder 6, the choke plug 2 is placed on the cylindrical barrel 6-1, the upper joint 1 is sleeved on the choke plug 2 and the cylindrical barrel 6-1, the lower part of the upper joint is connected with the valve bonnet 6, an annular channel 3 is formed between the cylindrical barrel 6-1 and the upper joint 1, the lower part of the annular channel 3 is communicated with the liquid outlet hole 6-3, the outer diameter of the choke plug 2 is larger than the inner diameter of the upper part of the upper joint 1, the choke plug 2 can block the upper channel of the upper joint 1 under the action of buoyancy force or liquid flow from bottom to top, after the choke plug 2 is pressed into the receiving hole 6-2 from top to bottom by external force, the outer wall 2-1 of the choke plug 2 is matched with the receiving hole 6-2 to fix the choke plug 2 in the receiving hole 6-2.

The utility model discloses install under the pump barrel of oil-well pump, in the time of going into the well liquid can not get into the oil pipe on the pump, the internal pressure of the pin class instrument of connection on the pump barrel of oil-well pump can not be higher than external pressure, and pin class instrument can not move midway, guarantees that the operation of going into the well is successful.

After the design position was gone down to the oil pumping tubular column, in going into the pump barrel under the sucker rod with oil-well pump piston connection again, oil-well pump piston lower part pressure separated choke stopper 2, made its choke stopper 2 no longer block up the upper portion passageway of top connection, the utility model discloses well liquid under can pass through go out liquid hole 6-3, annular channel 3 get into the pump in, the oil feed passageway is opened. The choke plug is pressed into the receiving hole 6-2 by the weight of the sucker rod, the outer wall 2-1 of the choke plug 2 is in static fit with the receiving hole 6-2, so that the choke plug 2 is fixed on the valve cover 6, the oil inlet channel is always opened, and the oil pump can normally pump oil.

Claims

1. The oil inlet device of the flow-resisting oil well pump comprises an upper connector (1), a flow-resisting plug (2), a valve ball (4), a valve seat (5), a valve cover (6) and a lower connector (7), wherein a valve cavity (6-4) and a liquid outlet hole (6-3) are formed in the valve cover (6), the valve ball (4) is placed in the valve cavity (6-4), the valve seat (5) is placed in a placement hole of the valve cover (6), the upper end of the valve seat (5) is in contact with an inner circular bead of the valve cover (6), the upper portion of the lower connector (7) is connected with the lower portion of the valve cover (6), the upper end face of the lower connector (7) abuts against the lower end face of the valve seat (5), the diameter of the valve ball (4) is larger than the aperture of the valve seat (5), the valve ball (4) is in matched sealing with an upper valve port of the valve seat (5), and liquid can flow upwards passes through an inner hole of the valve seat (5, The liquid outlet holes (6-3) flow through, liquid flow can not flow out from top to bottom, and the device is characterized in that: a cylindrical barrel (6-1) is arranged at the upper part of the valve cover (6), a receiving hole (6-2) is arranged in the cylindrical barrel (6-1), a choke plug (2) is arranged on the cylindrical barrel (6-1), the choke plug (2) and the cylindrical barrel (6-1) are sleeved by the upper joint (1), the lower part of the upper joint (1) is connected with the valve cover (6), an annular channel (3) is formed between the cylindrical barrel (6-1) and the upper joint (1), the lower part of the annular channel (3) is communicated with the liquid outlet hole (6-3), the outer diameter of the choke plug (2) is larger than the inner diameter of the upper part of the upper joint (1), the choke plug (2) can block the upper channel of the upper joint (1) under the action of buoyancy or the liquid flow from bottom to top, the choke plug (2) is pressed into the receiving hole (6-2) from top to bottom by an external force, the outer wall (2-1) of the flow blocking plug (2) is matched with the receiving hole (6-2) to fix the flow blocking plug (2) in the receiving hole (6-2).