CN2070354U

CN2070354U - Washing liquid-saving petroleum pipe end

Info

Publication number: CN2070354U
Application number: CN 90218167
Authority: CN
Inventors: 郑国英; 王�义
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-09-08
Filing date: 1990-09-08
Publication date: 1991-01-30

Abstract

The utility model relates to an oil pipe end capable of saving washing liquid, which is used for the wellhead of an oil production well in oilfields and arranged on a wellhead device (a christmas tree). The utility model is composed of an upper transversal passage and a lower transversal passage, wherein, a guide plate is arranged in the big cross joint. When an oil well is washed, the transversal passages for washing the well can guide the washing liquid to move only along an oil pipe, so that the reactive power loss on a casing pipe can be reduced, and the goal of saving the washing liquid can be achieved. The utility model has the characteristics of simple structure, reliable technicality, and easy manufacture. Compared with oil pipe ends in field use, the cost has fewer increase.

Description

Washing liquid-saving petroleum pipe end

The utility model relates to a kind of tubing head of producing well well head.

Owing to contain wax in the crude oil, rise to from the shaft bottom the process of well head at it, wax just can be separated out knot on the tubing wall and on the sucker rod, dwindles even stops up oil flow channel, influences crude oil production.

For addressing this problem, take anti-endless form to carry out well-flushing usually, crude oil or other liquid are heated to more than 80 ℃, pressurization utilizes the conduction of heat energy that the wax in the oil pipe is disposed after tubing head is squeezed into the annular space between oil pipe and the sleeve pipe.Because wax is that knot is in oil pipe, so become reactive loss to the heat energy of sleeve pipe conduction.What generally used in the oil field is 21/2 inch oil pipe and 51/2 inch sleeve pipe, tubing wall is 1:1.35 with the area ratio of casing wall, this has 57% conduction to make idle work to casing wall with regard to the heat energy that meaning enters annular space, the oil field flushing overwhelming majority makes flushing fluid with crude oil at present, promptly whenever washes a bite oil well and just is equivalent to have half also to want many well-flushing crude oil to squeeze in the well in vain.

The purpose of this utility model provides a kind of improved tubing head.It can guide flushing fluid only to move downward along oil-pipe external wall when the oil well well-flushing, thereby has reduced the reactive loss of heat energy on casing wall, saves flushing fluid.

The purpose of this utility model is achieved in that the bottom at the horizontal well-flushing passage of tubing head big four, there are the deflector of a circle shape and the wall of big four vertical passage to be connected as a single entity, the internal diameter of deflector is greater than the oil pipe external diameter, and formation one ring gap between the oil pipe external diameter.After flushing fluid is entered by horizontal well-flushing passage, diversed plate is held, can not be downward along casing wall, and by the gap between deflector and the oil-pipe external wall time, just can form pendular ring, surrounding oil-pipe external wall moves downward, in deflector bottom surface outer rim one circle youngster groove is arranged, stop flushing fluid, thereby make flushing fluid only along oil-pipe external wall conduction heat energy to sleeve movement.

The utility model compared with prior art, the starting point is only to allow flushing fluid move along tubing wall, has only increased a deflector, and is simple in structure.Deflector can be cast as one with tubing head, also can single-piece work, be welded then.Survey the needs of measures such as liquid level, kill-job aborning for satisfying oil well,, change two passages up and down into two interconnections on the same axis in the prior art.Upper channel is for well-flushing usefulness, and measures such as lower channel fuel feeding well surveying liquid level, kill-job are used.The special structure of the utility model can make flushing fluid be close to the downward landing of tubing wall, the landing speed of liquid is the same with the fail to be convened for lack of a quorum principle that produces climbing power of the air under the aircraft both wings, make flushing fluid circulation produce centripetal force, keep flushing fluid to fall until to the sleeve pipe liquid level so that ring-type liquid is fluent.For undesired because of producing, the sleeve pipe liquid level position carries out well-flushing at the oil well of well head, and the utility model can not be realized the purpose that guides, but does not influence well-flushing.When using the utility model well-flushing, control the discharge capacity of flushing fluid according to heat conducting heat-transfer rate, thereby reach well-flushing quality and economic benefit maximum value.

The concrete structure of utility model is provided by following examples and accompanying drawing.

Fig. 1 is the sectional drawing of the tubing head of the flushing fluid saved that the utility model proposes.

Describe detail and working condition in detail below in conjunction with Fig. 1 according to the tubing head of the saving flushing fluid that the utility model proposes.

When the oil well well-flushing, flushing fluid enters big four (1) by well-flushing passage (2), because the effect of deflector (4), flushing fluid can not be downward along big four (1) wall, and it is downward along arrow (8) with the gap of oil pipe (6) to pass through deflector (4), thereby makes flushing fluid along the tubing wall landing.Endless-oil groove (3) is in order to make flushing fluid form uniform pendular ring all around at oil pipe (6).Oil resistance groove (5) stops flushing fluid to big four (1) wall transverse movement.When surveying measures such as liquid level, kill-job at oil well, but usage measure passage (7).

So far, shown and introduced a utility model that when it has satisfied the oil well well-flushing, thereby flushing fluid does not reduce reactive loss along sleeve movement, the requirement of saving a large amount of flushing fluids, extensively model is applied.

Claims

1, is installed on the tubing head of the flushing fluid saved on the producing well wellhead assembly, this tubing head is made of big four (1), well-flushing passage (2) and measure passage (7) are arranged on it, endless-oil groove (3) and deflector (4) are arranged in it, it is characterized in that: deflector (4) is positioned at the bottom of well-flushing passage (2), link together with big four (1), the aperture that oil pipe (6) is passed is left at the center of deflector (4).

2, according to the tubing head of the flushing fluid saved of 1 art of claim, it is characterized in that: deflector (4) bottom surface outer rim has a circle oil resistance groove (5), and the degree of depth of groove is less than deflector thickness, and the width of groove is less than the deflector width.

3, according to the tubing head of the flushing fluid saved of 1,2 arts of claim, it is characterized in that: the internal diameter of deflector (4) is greater than the external diameter of oil pipe, and leaves the gap that flushing fluid is passed through.

4, according to the tubing head of the flushing fluid saved of 1 art of claim, it is characterized in that: endless-oil groove (3) is positioned on the deflector (4), with well-flushing passage (2) on same horizontal plane.

5, according to the tubing head of the flushing fluid saved of 1 art of claim, it is characterized in that: measure passage (7) is positioned at the bottom of deflector (4).