CN2348094Y

CN2348094Y - Downhole sliding sleeve switch device

Info

Publication number: CN2348094Y
Application number: CN 98235710
Authority: CN
Inventors: 张庆华; 湛精华
Original assignee: OIL PRODUCTION TECHNIQUE INST JIANGHAN PETROLEUM ADMINISTRATION
Current assignee: OIL PRODUCTION TECHNIQUE INST JIANGHAN PETROLEUM ADMINISTRATION
Priority date: 1998-05-07
Filing date: 1998-05-07
Publication date: 1999-11-10
Anticipated expiration: 2008-05-07

Abstract

The utility model discloses a switch device for exploring and blocking water in an oil well. The upper part of a sliding sleeve of the device and the inner part of a lower limiting body are provided with a spring pawl. When the spring pawls and downhole tools are matched and fall down into a corresponding layer, a switch controller is fallen down into the well by a cable, the switch controller is supplied with power on the ground, and the switch controller is opened by a butt joint pawl which is matched with the spring pawl on the upper end of the sliding sleeve. The cable is lifted, the sliding sleeve goes upward, the switch is opened, and an oil sleeve pipe is communicated. The butt joint pawl of the switch controller is shrunk and is put down, and the butt joint pawl is opened and is matched with the spring pawl on the lower limiting body. The cable is lifted, the sliding sleeve goes downward, the switch is closed, and the corresponding layer is blocked. Thus, under the normal producing condition, the water exploration and water blocking in random layers can be realized.

Description

Down-hole sliding sleeve switch device

The utility model relates to the switching device of a kind of oil well water detection, water blockoff, especially can by on carry the downhole on-off actuator that throw in catcher realize to open and close.

At present, known down-hole switch has two classes: a class is to sprain from oil pipe to compress into row opening and closing derailing switch, as " a kind of downhole on-off actuator of introducing on the oil production technology handbook, be to be lowered to throw in catcher center seal pipe with wire rope, spraining to press by oil pipe waterpower reaches the purpose that opens and closes derailing switch.But when implementing switch motion, must trip out flow string, otherwise can't adjust layer position, so just increase operating cost; An other class is need not trip out flow string, by realize the switch motion of downhole on-off actuator in ground controlling, go up a kind of sleeve type derailing switch of introducing as " Daqing oil field water pack off technology ", be to be lowered to the motor switch instrument from decentralized wellhead by cable, duty at Ground Control switch instrument butt joint pawl, finish the switch motion of corresponding interval derailing switch, realize the adjustment that repeats of any interval, but since it open or close action by on carry or down payout realize, if the down-hole is fouling or corrosion a little, transfer just very difficulty, make closing motion be difficult to realize.

The purpose of this utility model is to overcome the deficiency that prior art exists, and a kind of down-hole sliding sleeve switch device is provided, and makes it under the condition that normal pump is taken out, only by on propose action and just can open or close respectively, realize the repeat switch adjustment of any interval.

The utility model is such realization: sliding sleeve switch device overcoat upper end is threaded with top connection, and the lower end is connected with lower contact by adapter sleeve, and interior overcoat welds together, and has the hole on its correspondence position, forms passage.In the cover upper and lower side be connected with limit body up and down respectively by screw thread, seal by sealing ring between sliding sleeve and the interior cover, and can be up and down within the specific limits, the sliding sleeve upper end has the bullet pawl, the bottom is drilled with four holes, links to each other with spring detent in the lower limit body by wire rope.It and existing downhole tool be supporting to be lowered to corresponding each oil layer section position, with cable with the down-hole switch controller from decentralized wellhead G.I.H precalculated position, in the face of the power supply of down-hole switch controller, strut the butt joint pawl of on-off controller on ground, make it to match with the sliding sleeve upper end of downhole on-off actuator, last portable cable, sliding sleeve is up, and the spring detent that is installed in the lower limit body is descending thereupon, and derailing switch is opened, tubing and casing is communicated with, and the liquid of this layer can flow in the oil pipe from passage; In the time of need closing derailing switch, the butt joint pawl of on-off controller is shunk and transfer to accurate position, strut the butt joint pawl, make it to match with the spring detent of downhole on-off actuator, last portable cable, spring detent is up, it is descending to drive sliding sleeve by wire rope and pulley, and derailing switch cuts out, the corresponding interval of shutoff.

Owing to adopt such scheme, can transfer layer arbitrarily by fixed tubular column, and improve the success rate of transferring layer greatly.Easy construction is reliable, under the condition of oil well ordinary production, can realize the adjustment of switch repeatedly of any interval, has reduced operating cost, has improved economic benefit.

Below in conjunction with accompanying drawing the utility model is further specified.

Fig. 1 is the downhole on-off actuator structural representation.

Fig. 2 is a passage assembly schematic diagram.

Fig. 3 is a lower limit body assembly schematic diagram.

Fig. 4 is the down-hole string schematic diagram.

Accompanying drawing number is: top connection 1, upper limit body 2, " O " RunddichtringO 3, sliding sleeve 4, " O " RunddichtringO 5, interior cover 6, overcoat 7, lower limit body 8, spring detent 9, wire rope 10, wire rope coupling head 11, pressure cap 12, shop bolt 13, fixed pulley 14, connecting pin 15, adapter sleeve 16, lower contact 17, the upper limit step 18 of upper limit body inner surface, the lower limit step 19 of upper limit body inner surface, fluid course 20, the upper limit step 21 of lower limit body inner surface, the lower limit step 22 of lower limit body inner surface, oil well pump 23, back-off sub 24, packer 25, down-hole sliding sleeve switch device 26, snubber 27, down-hole switch controller 28, butt joint pawl 29, oil layer section 30.

Overcoat 7 upper ends are threaded with top connection 1, and the lower end connects by adapter sleeve 16 and lower contact 17 Connect, there are two through holes its bottom; Inner sleeve 6 upper and lower ends by screw thread respectively with the upper limit body 2 are connected connection with the lower limit body, its outer surface step place, middle part mills out the positioning key of two symmetries, And be drilled with two through holes at key, the through hole of itself and overcoat 7 lower ends is aligned rear welding, such as figure 2, just form fluid course 20. The upper limit step 18 of upper limit body inner surface is used for switch The guiding of controller, the lower limit step 19 of upper limit body inner surface is used for sliding sleeve 4 upper ends Spring detent spacing, make sliding sleeve 4 be in open mode.

Such as Fig. 3, lower limit body inner surface has upper limit step 21, lower limit step 22, on Limited step 21 is used for the spacing of on-off controller docking pawl, and lower limit step 22 is used for spring Pawl 9 spacing makes sliding sleeve 4 be in closed condition. Lower limit body 8 bottoms are milled with symmetrical Two grooves are used for fixed pulley 14 is installed, and steel wire rope 1O passes from fixed pulley 14; Apart from the lower end Be drilled with the screw of two symmetries nearby, be used for the restraining spring pawl after shop bolt 13 is installed 9 Bottom Runby. Sliding sleeve 4 upper ends are positioned at inner sleeve 6 inner surfaces, and there is spring detent the upper end, altogether 12 pawls have an inclined-plane on each pawl, this inclined-plane docks pawl with on-off controller claw is oblique Face matches, and mid portion has " O " RunddichtringO 5, and totally four, on one side twice, when liquid stream Passage 20 is between middle two seals circle the time, and sliding sleeve is called " closed condition "; Sliding sleeve 4 Up, when making " O " shape sealing ring 5 be positioned on the fluid course 20, sliding sleeve is called " to be opened State ". Sliding sleeve 4 lower ends are drilled with four holes, and steel wire rope 10 passes wherein, by steel wire rope 10 Link to each other with spring detent 9. Spring detent 9 is positioned at lower limit body 8 inner surfaces, paw sizes and shape The same with the spring detent on sliding sleeve 4 tops.

Embodiment: as shown in Figure 4, the site operation tubing string is made up of oil well pump 23, back-off sub 24, packer 25, down-hole sliding sleeve switch device 26, snubber 27, down-hole switch controller 28 etc.During on-the-spot the use, down-hole sliding sleeve switch device is lowered between the two-stage packer, aims at oil layer section 30 positions, after tubing string is given up, be lowered to pump and take out tubing string.Termination magnetic locator on the down-hole switch controller, by decentralized wellhead with cable predetermined degree of depth in annular space is lowered to the tubing string of giving up, connect the down-hole switch controller power source, its butt joint pawl discharges, when electric current increases suddenly, oneself is in complete release conditions proof butt joint pawl, the spring detent of butt joint pawl and sliding sleeve 4 upper ends matches, carry on-off controller on this moment, sliding sleeve 4 up (spring detent 9 is descending thereupon) is opened the sliding sleeve switch device, and tubing and casing is communicated with, the liquid of this layer can enter in the oil pipe from fluid course 20, and the production fluid amount and the moisture content of corresponding interval can be measured in ground.In the time of need closing the sliding sleeve switch device, the butt joint pawl of down-hole switch controller shunk and transfer to accurate position, making the butt joint pawl discharge the back fully matches with spring detent 9, carry on-off controller on this moment, spring detent 9 is up, it is descending to drive sliding sleeve 4 by wire rope and pulley, the sliding sleeve switch device cuts out the corresponding interval of shutoff.

Claims

1, a kind of down-hole sliding sleeve switch device of being made up of top connection, upper limit body, sliding sleeve, passage assembly, adapter sleeve, lower limit assembly, spring detent, lower contact is characterized in that the sliding sleeve upper end is spring detent form of structure and links to each other with spring detent by wire rope.

2, down-hole according to claim 1 sliding sleeve switch device is characterized in that design has limit body assembly, its bottom to be milled with two grooves of symmetry between sliding sleeve and lower contact.