CN2231307Y

CN2231307Y - Packer

Info

Publication number: CN2231307Y
Application number: CN 95203778
Authority: CN
Inventors: 王锡来
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-02-28
Filing date: 1995-02-28
Publication date: 1996-07-17
Anticipated expiration: 2005-02-28

Abstract

The utility model relates to a packer used for separated layer water-flooding for oil gas field, which is particularly suitable for separated layer water-flooding, layered acidification and layered chemical water blocking. The outside diameter of an outer center pipe of the packer is less than 76 mm, and the packer can adopt a standard thick rubber barrel. The outer center pipe and a valve sleeve of a well washing valve are connected through silk dan. The well washing valve adopts a soft sealing valve ring. A supporting sleeve is arranged on the lower part of an inner center pipe. The step inclination angle of a pipe slip seat is less than 30 DEG. A regulating cap which adjusts the compressing distance is arranged above the pipe slip seat. The inside diameter of a pipe slip rod of a pipe slip is at least 2 mm longer than the inside diameter of a pipe slip head. An adjusting ring is arranged between a lower piston and a lower joint. The length of an upper piston and the lower piston is at least 11 mm longer than the compressing distance of a rubber barrel. The two pistons adopt joining head adjacent angles. The assembly gap of components is adjusted by the adjusting ring 17.

Description

Packer

The utility model relates to the downhole tool that a kind of oil gas field seperated layer water injection is used, and is specially adapted to seperated layer water injection, separate layer acid treatment and layering chemical water shutoff.

The patent No. of often using is 91219035.3 packer now, because interior exterior central tube aperture is excessive, and have to adopt thin packing element, and thin packing element is withstand voltage low, often causes the compression wrinkle that sealability is descended.Its two be the compression of this packing element apart from can not adjusting according to the sleeve pipe size, often make that the packing element compression is too small to be caused poorly sealed or compressed the fragmentation of ambassador's packing element.Its three, this packer inner central tube unreasonable structure, and its thread can only adopt non-standard screw thread, causes processing, detection difficult.Four to be that the slip spider tup of separating sealing mechanism cooperates with the inner central tube step unreasonable for it, causes tup not set back and deblocking fully, causes down-hole accident.It five is that flushing valve adopts hard sealing means, and the burning into sand thorn is bad easily, reduces sealing life, and flushing valve is positioned at well-flushing passage bottom, at well-flushing passage inner product sand plug plug, causes well-flushing to carry out easily.Its six be this packer assembling difficulty big, must just can assemble through the repeated disassembled and assembled adjustment.Its seven be length and the compression of two pistons apart from quite, cause piston to take off cylinder easily, and two-piston adopts the top contact, when assembly clearance is big slightly, can cause the dislocation accident of going into the well.

It is effective that the purpose of this utility model is to design a kind of packing, is easy to process and assemble, is easy to the novel packer of well-flushing and deblocking.

The purpose of this utility model is achieved in that the structural change of the inner central tube of existing packer, is processed into the inner central tube that an internal diameter is not more than 50mm, with original inner central tube step cancellation, processes a support set in addition and replaces; Correspondingly reduce the size (being not more than 76mm) of the external diameter of exterior central tube, thereby make packing element can adopt the thick packing element of standard; Install one and transfer cap on slip spider, the compression that makes packing element is apart from adjusting as required; An adjustable ring is installed between lower piston and lower contact, is adjusted the gap between each parts when being convenient to assemble, reduce the assembling difficulty; Simultaneously, with the length of two pistons up and down process than compression apart from big (big at least 11mm), the top contact with two-piston simultaneously makes the joining seam contact into, makes the unlikely cylinder that takes off of piston like this, also can not cause the collision dislocation when going into the well.In addition, the utility model has also carried out causing making to its deblocking device, the former miter angle of slip spider tup step is decreased to is not more than 30 degree, when making deblocking like this slip spider tup can be on support set smooth sliding.Slips is also corresponding has done improvement, and greatly at least more than the 2mm, in the deblocking process, after slip insert slipped over the slip spider tup, slips had enough spaces to separate with lock tube to the internal diameter that makes slips bar part like this than the internal diameter of slip insert part, and deblocking is very convenient.In addition, flushing valve is moved to top from well-flushing passage bottom, avoid silt particle to move to top, avoid silt particle poly-rent in the well-flushing passage from well-flushing passage bottom; The hard sealing of flushing valve caused be soft seal, overcome the burning into sand thorn and leak and cause short shortcoming sealing life.

Advantage of the present utility model is: than original packer, deblocking is very convenient, can adopt the thick packing element of standard, and the compression of packing element is apart from adjusting as required, because on having changed, the way of contact of lower piston, make the unlikely cylinder that takes off of piston, can when going into the well, not cause the collision dislocation yet, adjust the gap between each parts when being convenient to assemble through improved packer, reduced the assembling difficulty, can avoid silt particle to move to top from well-flushing passage bottom and build up,, overcome the burning into sand thorn and leak the shortcoming that causes weak point sealing life owing to change the hard sealing of flushing valve into soft seal.

Be further described below in conjunction with accompanying drawing.

Fig. 1 is the utility model packer schematic diagram.

Fig. 2 is the utility model packer well-washing valve portion schematic diagram.

Fig. 3 is slips, slip spider, support set, the accent cap device schematic diagram of the utility model envelope device.

Fig. 4 is the adjustable ring device schematic diagram of the utility model packer assembly clearance.

The outer layer segment of packer of the present utility model has packing element 3, spacer ring 5, bearing ring 6 and flushing valve 10, exterior central tube 2 tops that the centre seals in link to each other with top connection 1, the bottom is connected with a lock tube 9, and lock tube 9 bottoms connect upper piston 12 again successively, lower piston 13, adjustable ring 17 and lower contact 14.Upper and lower piston 12,13 all is enclosed within on the piston head 11.An inner central tube 4 that links to each other with top connection 1 is arranged in the exterior central tube 2, and support set 16 is enclosed within the bottom of inner central tube 4.Slip spider 7 and slips 8 are housed between lock tube 9 and inner central tube 4.Circular passage between exterior central tube 2 and the inner central tube 4 constitutes the well-flushing passage.In packer of the present utility model, flushing valve 10 is positioned at packer well-washing passage top (as Fig. 2), can avoid silt particle to stop up the well-flushing passage like this.A soft seal valve collar 18 is housed in the flushing valve.Owing to be soft seal, can not sting bad because of burning into sand.In existing packer, exterior central tube 2 is an integral body with the valve pocket 19 of flushing valve 10, and processing is difficulty relatively.The utility model is with its split processing, and is very easy.In existing packer, the outer warp of exterior central tube 2 generally more than 80mm, thereby make packing element 3 have to adopt thin packing element.Generally more than 53mm, this makes its connecting filament load have to adopt non-standard screw thread to the interior warp of inner central tube 4.In packer of the present utility model, the external diameter of exterior central tube 2 is not more than 76mm, makes it to adopt the thick packing element of standard, and the internal diameter of inner central tube 4 is not more than 50mm, thereby can adopt 23/8 o'clock oil pipe standard screw thread.

As Fig. 3, a support cover 16 is equipped with in the bottom of inner central tube 4, and its function is the same with the inner central tube step of existing packer.In the existing packer, this step and inner central tube 4 are an integral body, processing charges material and difficulty.And in the utility model, support set 16 be one independent, be easy to processing.The top of slip spider 7 has been installed one and has been transferred cap 15, is convenient to adjust the compression distance according to the sleeve pipe size.Slip spider 7 beat inclination angle, caster bed rank less than 30 degree, make it can be on support set smooth sliding.In existing packer, the slips bar of slips 8 is the same with slip insert two parts internal diameter, and in the utility model, the internal diameter of slips bar part is than the big at least 2mm of internal diameter of slip insert part, the deblocking of being more convenient for like this.

As Fig. 4, adjustable ring 17 is between lower piston 13 and lower contact 14.This adjustable ring 17 makes the assembling of packer become very convenient.

Claims

1, the packer that a kind of oil gas field seperated layer water injection is used, mainly by top connection (1), exterior central tube (2), packing element (3), inner central tube (4), spacer ring (5), bearing ring (6), slip spider (7), slips (8), lock tube (9), flushing valve (10), piston head (11), upper piston (12), lower piston (13) and lower contact (14), transfer cap (15), support set (16), adjustable ring (17), soft seal valve collar (18), valve pocket (19) is formed, it is characterized in that: exterior central tube (2) is installed on the inner central tube (4), exterior central tube (2) partly adopts screwed connection with the valve pocket of flushing valve (10), a soft seal valve collar (18) is installed in the flushing valve (10), a support set (16) is equipped with in inner central tube (4) bottom, this support set (16) is connected on the piston head (11) simultaneously with inner central tube (4), the top of slip spider (7) is equipped with one and transfers cap (15), slips (8) places on the slip spider (7), between lower piston (13) and lower contact (14), an adjustable ring (17) is installed, adopts joining seam to contact between upper piston (12) and the lower piston (13).

2. packer according to claim 1 is characterized in that: the external diameter of exterior central tube (2) is less than 76mm, and the internal diameter of inner central tube (4) is less than 50mm.

3. packer according to claim 1 is characterized in that: the tup step inclination angle of slip spider (7) is less than 30 degree.

4. packer according to claim 1 is characterized in that: the internal diameter of slips (8) upper slips bar part is than the big at least 2mm of internal diameter of slip insert part.

5. packer according to claim 1 is characterized in that: the length of upper piston (12) and lower piston (13) is than the big at least 11mm of compression distance.