CN2846742Y - Positioning cementing well water injection ement switch - Google Patents

Abstract

The utility model relates to a positioning cementing well cement injection switch for oil water well drilling engineering, which is composed of an upper joint 1, an upper rubber cylinder 2, a central pipe 3, a sliding sleeve 4, a lower rubber cylinder 5, a seat sealing inner sleeve 6, a seat sealing male pin 7, a seat sealing outer sleeve 8, a connecting pipe 9, a positioning sleeve 10, a spring 11, a steel ball 12, a positioning male pin 13, a positioning inner sleeve 14, a fixing pin 15, a positioning locking block 16 and a guide shoe 17, wherein the upper end of the central pipe 3 is connected with the upper joint 1, the lower end is connected with the seat sealing inner sleeve 6 and the outside is sheathed with the upper rubber cylinder 2, the sliding sleeve 4 and the lower rubber cylinder 5. The lower part of the seat sealing inner sleeve 6 is sheathed with the seat sealing outer sleeve 8 and the lower part of the seat sealing outer sleeve 8 is connected with the upper part of the connecting pipe 9. The lower part of the connecting pipe 9 is connected with the positioning sleeve 10 on the outside of the connecting pipe 9, and the positioning inner sleeve 14 is arranged in the lower part of the positioning sleeve 10. The spring is arranged between the connecting pipe 9 and the positioning inner sleeve 14, and the steel ball 12 is arranged below the spring. The positioning locking block 16 is arranged on the positioning inner sleeve 14 and is connected and fixed by the fixing pin 15. The lower end of the positioning sleeve 10 is connected with the guide shoe 17. The utility model can be matched with a preset positioning device when a well is cemented by layers, and cement plug can not be remained after well completion, and thus the work efficiency of the well completion can be increased and the construction period of the well completion can be shortened.

Description

Location cementing switch

Technical field:

The utility model relates to a kind of downhole tool that is used for the well cementation of oil-water well drilling engineering location.

Background technology:

Completion is last one important procedure of oil-water well drilling engineering.At present, the completion method of oil field field by using and the downhole tool of use are varied, adopt lower screen completion, top for various reasons usually or hang or finish with the cement paste sealing with packer for sidetracked hole.For the oil-water well of top with cement sealing, because downhole tool is limit, can in well, stay cement plug, thereby also want drilling out after the completion in the past, influence the raising of drilling completion work efficiency and the shortening of duration.

Summary of the invention:

Thereby the purpose of this utility model is to provide a kind of location cementing switch that does not stay cement plug can improve drilling completion work efficiency, shortening completion period in spoiler, the well of can realizing presetting.

The utility model is to realize like this.This kind cementing switch by top connection, go up in cover in packing element, central tube, sliding sleeve, lower rubber cylinder, the seat envelope, seat offset nail, seat envelope overcoat, tube connector, positioning sleeve, spring, steel ball, shop bolt, the location cover, steady pin, location lock dog and guide shoe and form, the central tube upper end is hinged with a top connection with external screw thread, the lower end is connected with cover in the seat envelope with internal thread, the outside is set with packing element, sliding sleeve and lower rubber cylinder, the outside, cover bottom is set with seat envelope overcoat in the seat envelope, and the two is connected and fixed with seat offset nail; Seat envelope overcoat lower inside is connected with tube connector top with screw thread, and the tube connector bottom is connected with the positioning sleeve that is sleeved on its outside with screw thread; Set cover in the position in the positioning sleeve bottom, apply mechanically shop bolt in positioning sleeve and the location and be connected and fixed, be provided with spring between the cover in tube connector and the location, be provided with steel ball below the spring; Put in the location and the location lock dog is housed and is connected and fixed with steady pin, the tipping of positioning sleeve lower end has guide shoe.During construction, this device is hinged with at the completion tubular column G.I.H, to locate the cementing device simultaneously and be connected on and send into the tubing string lower end, a series of activities such as finish suspension earlier, give up, transfer then or on submit into tubing string to design attitude, suppress and make steel ball and positioning sleeve descending, cut off shop bolt, the location lock dog rotates around steady pin under the spring thrust effect, stretch out greater than the instrument external diameter its outside, and entire tool is sitting on the positioner of reserving on the completion tubular column.Press down and send into tubing string, it is descending that cover drive is gone up in packing element, central tube, sliding sleeve and the seat envelope in top connection, upper and lower packing element is expanded, seal the annular space between this device and completion tubular column, at this moment, the injection hole of this instrument faces the injection hole of positioner on the completion tubular column, injects cement paste and realizes the location well cementation.Cement paste injects and finishes to submit into tubing string on the back, and upper and lower packing element resets, and circulation port on the central tube and the circulation port on the sliding sleeve are by the sealing ring packing.The orientation of location lock dog is downward, can bounce back under external force when carrying on sending into pipe, can not influence on the tubing string and carry.At last, the anti-circulation of turn on pump washes out and sends into unnecessary cement paste in the pipe.If sealing is a plurality of well sections, then want nethermost one section of first sealing, submit into the supreme target zone of tubing string on then, repeat aforesaid operations.

The utility model has been compared following advantage and effect with existing technology: this device can be when layering be cemented the well with preset positioner and cooperate, do not stay cement plug after the completion, the while need not be bored spoiler, thereby can improve the completion work efficiency, the shortening completion period; This device can next time bore solid respectively different well sections, and can reuse.

Description of drawings:

Accompanying drawing is a structural representation of the present utility model.

The specific embodiment:

The utility model is provided by following examples, is illustrated below in conjunction with accompanying drawing.

As shown in the figure, the utility model is by top connection 1, last packing element 2, central tube 3, sliding sleeve 4, lower rubber cylinder 5, cover 6 in the seat envelope, seat offset nail 7, seat envelope overcoat 8, tube connector 9, positioning sleeve 10, spring 11, steel ball 12, shop bolt 13, cover 14 in the location, steady pin 15, location lock dog 16 and guide shoe 17 are formed, its structure, assembled relation is as follows: central tube 3 upper ends are hinged with a top connection 1 with external screw thread, the lower end is connected with cover 6 in the seat envelope with internal thread, the outside is set with packing element 2, sliding sleeve 4 and lower rubber cylinder 5, the outside, cover 6 bottoms is set with seat envelope overcoat 8 in the seat envelope, and the two is connected and fixed with seat offset nail 7; Seat envelope overcoat 8 lower inside are connected with tube connector 9 tops with screw thread, and tube connector 9 bottoms are connected with the positioning sleeve 10 that is sleeved on its outside with screw thread; Set cover 14 in the position in positioning sleeve 10 bottoms, cover 14 usefulness shop bolts 13 are connected and fixed in positioning sleeve 10 and the location, are provided with spring 11 between the interior cover 14 in tube connector 9 and location, and spring 11 belows are provided with steel ball 12; Location lock dog 16 is housed on the cover 14 in the location also is connected and fixed with steady pin 15, the tipping of positioning sleeve 10 lower ends has guide shoe 17.Wherein, with sealing interior cover 6 external screw thread that is connected and internal threads with top connection 1 and seat, tube wall upper edge, middle part is evenly distributed in a plurality of cement paste circulation ports to central tube 3 upper and lower ends respectively.Last packing element 2, lower rubber cylinder 5, specification, structure are identical, and it is opposite that direction is set, and last packing element 2 lower ends, lower rubber cylinder 5 upper ends are the inclined-plane respectively and match with sliding sleeve 4.Sliding sleeve 4 is the sleeve body that big footpath, middle part, upper and lower side are the conical surface, and the middle part barrel is provided with injection hole.Cover 6 is the circle cover that an end band external screw thread, periphery are provided with step in the seat envelope, and seat envelope overcoat 8 is the circle cover that a upper and lower end band internal thread, top inner headed face are provided with step, and the two place of being matchedly connected is provided with pin hole respectively.Tube connector 9 middle part peripheries are established a step, the upper and lower screw thread that is respectively equipped with of step.Positioning sleeve 10 upper end band internal threads, the bottom is provided with pin hole, and the lower end inner headed face has a recessed step.Cover 14 external diameters are up big and down small in the location, and periphery has a step, and ball seat shape is made in the inner headed face upper end.Location lock dog 16 is similar to " Γ " shape, which is provided with fixed pin holes.

Claims (1)

1, a kind of location cementing switch, by top connection (1), last packing element (2), central tube (3), sliding sleeve (4), lower rubber cylinder (5), cover (6) in the seat envelope, seat offset nail (7), seat envelope overcoat (8), tube connector (9), positioning sleeve (10), spring (11), steel ball (12), shop bolt (13), cover (14) in the location, steady pin (15), location lock dog (16) and guide shoe (17) are formed, it is characterized in that: central tube (3) upper end is hinged with a top connection (1) with external screw thread, the lower end is connected with cover (6) in the seat envelope with internal thread, the outside is set with packing element (2), sliding sleeve (4) and lower rubber cylinder (5), the outside, cover (6) bottom is set with seat envelope overcoat (8) in the seat envelope, and the two is connected and fixed with seat offset nail (7); Seat envelope overcoat (8) lower inside is connected with tube connector (9) top with screw thread, and tube connector (9) bottom is connected with the positioning sleeve (10) that is sleeved on its outside with screw thread; Set cover (14) in the position in positioning sleeve (10) bottom, cover (14) is connected and fixed with shop bolt (13) in positioning sleeve (10) and the location, is provided with spring (11) between tube connector (9) and the interior cover in location (14), and spring (11) below is provided with steel ball (12); Location lock dog (16) is housed on the cover (14) in the location also is connected and fixed with steady pin (15), the tipping of positioning sleeve (10) lower end has guide shoe (17).

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