CN201110155Y

CN201110155Y - Well head receding machine

Info

Publication number: CN201110155Y
Application number: CNU2007201266099U
Authority: CN
Inventors: 欧连贵
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-08-03
Filing date: 2007-08-03
Publication date: 2008-09-03
Anticipated expiration: 2017-08-03

Abstract

The utility model relates to a well mouth return channel, which is characterized in that an O-shaped ring (5) is mounted in an outer pipe (3), an inner pipe (4) is mounted in the outer pipe (3), which is connected with screw threads of the outer pipe (3), and an oil pipe hanger (2) which is equipped with an O-shaped ring (1) is connected with the screw threads of the outer pipe (3). When the well mouth return channel is mounted in site, the well mouth return channel is mounted on the uppermost end of an oil pipe on the top portion and is landed in a well, and the oil pipe hanger (2) can be placed in a well-mouth big cross joint. When a bar is landed in an oil well, a return passage is opened by a rotatable inner tube (4) which is a special-purpose tool, oil and water which are squeezed from the oil pipe flow into a cannula through the return passage, and the purpose of avoiding ground pollution, guaranteeing construction security and cleaning and sanitary can be achieved. The inner tube (4) is led to downwards move by the rotatable inner tube (4) which is a special-purpose tool after finishing landing the bar, and the return passage is closed, namely well completion production can be achieved through a conventional method.

Description

The well head backflow device

Affiliated technical field

The utility model relates to the well head oil tool of sucker rod pump in a kind of oil exploitation, especially can effectively prevent the well head backflow device of ground pollution.

Background technology

Sucker rod pump is in operation inspection pump work progress, want to descend pump after the first pressure testing, be full of oil, water after the pressure testing in the oil pipe, roofbolt will occupy certain space during owing to lower beam, therefore, roofbolt can be extruded the oil in the oil pipe, water and flow to ground during lower beam, and particularly You density is little, floats to the top of tubing string easily, extrude the liquid that flows to ground and mostly be crude oil, both caused the pollution on ground, the safety and the sanitation and hygiene of influence construction are the difficult problems of puzzlement sucker rod pump operation inspection pump construction always again.

Summary of the invention

Oil, water extruded when solving the sucker rod pump lower beam and flow to ground, both caused the pollution on ground, influence the difficult problem of construction safety and sanitation and hygiene again, the utility model provides a kind of well head backflow device, this well head backflow device can make the oil, the water that are extruded in the oil pipe return sleeve pipe smoothly in oil well operation inspection pump work progress, avoid ground pollution, guarantee the safety and the sanitation and hygiene of construction.

The technical scheme in the invention for solving the technical problem is:

The O type of packing in the outer tube 3 circle 5, interior pipe 4 are packed in the outer tube 3, and are threaded with outer tube 3, and boll-weevil hanger 2 installs O type circle 1 and is threaded with outer tube 3, has just formed the well head backflow device.

The beneficial effects of the utility model are, this well head backflow device, and simple in structure, easy to use, safe and reliable, effect is superior; Can in oil well operation inspection pump work progress, make the oil, the water that are extruded in the oil pipe return sleeve pipe smoothly, avoid ground pollution, guarantee the safety and the sanitation and hygiene of construction.

Description of drawings

Engaging drawings and Examples below further specifies the utility model.

Fig. 1 is the vertical section constructional drawing of first embodiment.

Fig. 2 is the vertical section constructional drawing of second embodiment.

Among Fig. 1: 1.O shape circle, 2. boll-weevil hanger, 3. outer tube, 4. in pipe, 5.O shape circle, Ф. the return flow line.

Among Fig. 2: 3. outer tube, 4. in pipe, 5.O shape circle, Ф. the return flow line.

The specific embodiment

In the embodiment shown in fig. 1, boll-weevil hanger 2 is conventional oil well boll-weevil hanger.Outer tube 3 is that an end car has internal thread, and the two ends car has external screw thread, and the middle part internal diameter is big, and car has vertical slot Ф, and the tubular body of O shape ring recess is arranged near the big two ends car of internal diameter.Interior pipe 4 is that an end car has external screw thread, and is milled with the tubular body of alveolus.

In embodiment illustrated in fig. 2, outer tube 3, interior pipe 4 are identical with the structure of Fig. 1.

The O type of packing in the outer tube 3 circle 5, interior pipe 4 are packed in the outer tube 3, and are threaded with outer tube 3, have just formed the well head backflow device.

When install and use at first embodiment scene of the utility model, the utility model is installed in the oil pipe upper end at top, G.I.H, boll-weevil hanger 2 are sitting in the well head big four and get final product; When install and use at second embodiment scene of the utility model, the utility model is installed in the oil pipe upper end at top, G.I.H, top connects boll-weevil hanger and gets final product.When the lower beam of the qualified back of oil well pressure testing, with pipe 4 in the special tool rotation, pipe 4 is opened the return flow line φ of outer tube 3 to top offset in making, can be according to a conventional method with the roofbolt G.I.H; Roofbolt flows to oil, the water that is extruded in the oil pipe in the sleeve pipe by return flow line φ during lower beam, can reach the purpose of avoiding ground pollution and guaranteeing construction safety and sanitation and hygiene.After roofbolt had descended, with pipe 4 in the special tool rotation, pipe 4 was closed the return flow line φ of outer tube 3, according to a conventional method completion to bottom offset in making.

Claims

1. the well head oil tool well head backflow device of sucker rod pump in the oil exploitation; It is characterized in that: the O type of packing in the outer tube (3) circle (5), interior pipe (4) are packed in the outer tube (3), and are threaded with outer tube (3), and boll-weevil hanger (2) installs O type circle (1) and is threaded with outer tube 3.

2. well head backflow device according to claim 1 is characterized in that: outer tube (3) is that an end has internal thread, and there is external screw thread at two ends, and the middle part internal diameter is big, and vertical slot is arranged, and the tubular body of O shape ring recess is arranged near the big two ends of internal diameter; Interior pipe (4) is that an end has external screw thread, and the tubular body of alveolus is arranged.