CN209413898U - Top uncoupling type anti-overflow fracturing string - Google Patents

Abstract

The utility model relates to a kind of top uncoupling type anti-overflow fracturing strings.It mainly solves the problems, such as to overflow a large amount of sump oil sewage in oil pipe when existing oil-water well lower oil tube operation and pollute environment.It is characterized by: being connected with anti-spill valve (1) on the oil pipe (2), upper anti-spill valve (1) bottom, which connects, mentions a section oil pipe at least one, and mentioning a section oil pipe bottom on each is all connected with lower anti-spill valve (7)；Oil pipe (2) bottom is connected at least two packers (4), and a sanding machine (5) is connected between two packers (4), wherein packer (4) bottom of lower end is connected with silk plug (6).The top uncoupling type anti-overflow fracturing string can prevent overflowing liquid in oil pipe, easy to operate, safety and environmental protection in upper mention.

Description

Top uncoupling type anti-overflow fracturing string

Technical field

The utility model relates to oilfield, specifically a kind of top uncoupling type anti-overflow fracturing string.

Background technique

It is inevitable in oil pipe when stratum energy is big, bottom pressure is high at present in oil-water well routine lower oil tube operation process A large amount of sump oil sewage can be overflowed, can cause environmental pollution, while a degree of injury is caused to enterprise employee health.Especially needle The construction well that pressure break is carried out to upper lifting pipe post, need to open well mouth oil pipe upper lifting pipe post, oil pipe can overflow without interior anti-overflow measure at this time A large amount of sump oil sewage out, there are biggish environmental pollution phenomenons.But as " environmental law " is supplemented with " priority pollutant discharges total Environmentally protective construction is carried out in the control of amount ", has become industry energy conservation consumption reduction, control pollution, transforms mode of economic growth most Good mode.And for underground work, if wanting to realize environmental protection, the key of problem is how to guarantee the sump oil of work progress Sewage does not land.

Utility model content

Environment is polluted in order to which a large amount of sump oil sewage can be overflowed when overcoming existing oil-water well lower oil tube operation in oil pipe Deficiency, the utility model provides a kind of top uncoupling type anti-overflow fracturing string, and the top uncoupling type anti-overflow fracturing string is in upper mention It can prevent overflowing liquid in oil pipe, easy to operate, safety and environmental protection.

The technical solution of the utility model is: a kind of top uncoupling type anti-overflow fracturing string, including oil pipe, connects on the oil pipe It is connected to anti-spill valve, upper anti-spill valve bottom, which connects, mentions a section oil pipe at least one, mentioning a section oil pipe bottom on each connects Connect lower anti-spill valve；The oil pipe bottom is connected at least two packers, and a sanding machine is connected between two packers, Wherein the packer bottom of lower end is connected with silk plug.

Section oil pipe lower end that above mentions is connected with pressure release seating nipple, and pressure release seating nipple lower end connects lower anti-spill valve.

The utility model has the following beneficial effects: due to taking above scheme, under the top uncoupling type anti-overflow fracturing string End can connect fracturing tool, can carry out pressure break；The anti-spill valve and seating nipple of tubing string upper end connection, when needing above to mention, well Blanking plug is put into mouth oil pipe, blanking plug blocks space in oil pipe；Then upper lifting pipe post is exposed to seating nipple with anti-spill valve Well head closes anti-spill valve；Oil pipe is laid down, above mentions and finishing, can directly carry out lower layer's pressure break.Repeating above operation can be achieved repeatedly Without overflow in upper lifting pipe.It is easy to operate using the tubing string, success rate is high, improves work efficiency, reduce the spray of sump oil sewage Output is good for the environment construction.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the structural schematic diagram of the utility model embodiment two.

Anti-spill valve on 1- in figure, 2- oil pipe, 3- pressure release seating nipple, 4- packer, 5- sanding machine, 6- silk plug are prevented under 7- Overflow valve.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawing:

As shown in Fig. 1, Fig. 2, a kind of top uncoupling type anti-overflow fracturing string, including oil pipe 2 is connected on the oil pipe 2 Anti-spill valve 1, upper 1 bottom of anti-spill valve, which connects, mentions a section oil pipe at least one, and mentioning a section oil pipe lower end on each is all connected with down Anti-spill valve 7, wherein the number that the quantity for above mentioning section oil pipe and lower anti-spill valve 7 above mentions as needed determines.The oil pipe 2 Bottom is connected at least two packers 4, and a sanding machine 5 is connected between two packers 4, the packer 4 needed and spray 5 quantity of sand device are determined that wherein 4 bottom of packer of lower end is connected with silk plug 6 by the pressure break number of plies.

The tubing string is according to execution conditions difference, using different structures:

Embodiment one: above proposing distance shorter (above mentioning distance < 20m), and upper 1 lower end of anti-spill valve connection above mentions section oil at this time Pipe above mentions a section oil pipe lower end and is directly connected to lower anti-spill valve 7, and it is another that lower 7 bottom of anti-spill valve can continue connection as needed One above mentions section oil pipe and another lower anti-spill valve 7 (such as Fig. 1).

Embodiment two: above proposing distance longer (above mentioning distance >=20m), and upper 1 lower end of anti-spill valve connection above mentions section oil at this time Pipe, above mentions a section oil pipe lower end connection pressure release seating nipple 3, and 3 bottom of pressure release seating nipple connects lower anti-spill valve 7, the lower anti-overflow 7 bottom of valve can continue to connect another as needed above mentions a section oil pipe, above mentions a section oil pipe lower end and is sequentially connected pressure release seating nipple 3 again With another lower anti-spill valve 7 (such as Fig. 2), the number of the pressure release seating nipple 3 and lower anti-spill valve 7 that need mentions number from above and determines It is fixed.

When work, each pressure release seating nipple 3 and anti-spill valve are designed first, in accordance with above mentioning number, above proposing distance every time Position gets out matching used spring blanking plug.Then, decentralization tubing string carries out pressure break in place.When needing above to mention, well is opened Mouthful oil pipe puts into spring blanking plug, to oil pipe fluid injection, device to be occluded in place after, the pressure release passage of pressure release seating nipple 3 is opened, and is blocked up The seal section for filling in device and pressure release seating nipple 3 cooperates, and reaches sealing effect.Upper anti-spill valve 1 above is closed, oil pipe is above mentioned, this When oil pipe in blocked due to blanking plug, without overflow.When pressure release seating nipple 3 and following lower anti-spill valve 7 expose well head, close Lower anti-spill valve 7 is closed, after laying down oil pipe, well head is installed, lower anti-spill valve 7 is opened, carries out next layer of pressing crack construction.If above mention away from From smaller, then an oil pipe is above directly mentioned, when anti-spill valve 7 exposes well head instantly, closes lower anti-spill valve 7, after laying down oil pipe, It repeats above operation and is finished until above mentioning, can be realized not overflow in upper lifting pipe post oil pipe.

Claims (2)

1. a kind of top uncoupling type anti-overflow fracturing string, including oil pipe (2), it is characterised in that: be connected on the oil pipe (2) anti- Overflow valve (1), upper anti-spill valve (1) bottom, which connects, mentions a section oil pipe at least one, and mentioning a section oil pipe bottom on each is all connected with Lower anti-spill valve (7)；Oil pipe (2) bottom is connected at least two packers (4), and is connected between two packers (4) One sanding machine (5), wherein packer (4) bottom of lower end is connected with silk plug (6).

2. top uncoupling type anti-overflow fracturing string according to claim 1, it is characterised in that: section oil pipe lower end that above mentions connects It is connected to pressure release seating nipple (3), pressure release seating nipple (3) lower end connects lower anti-spill valve (7).