CN2779063Y

CN2779063Y - Pressure balance type mechanical pushing device

Info

Publication number: CN2779063Y
Application number: CNU2004201206605U
Authority: CN
Inventors: 张青敏; 谭艳儒; 王宏
Original assignee: LIAOHE OIL FIELD YULONG INDUSTRY CO LTD PANJIN
Current assignee: LIAOHE OIL FIELD YULONG INDUSTRY CO LTD PANJIN
Priority date: 2004-12-15
Filing date: 2004-12-15
Publication date: 2006-05-10
Anticipated expiration: 2014-12-15

Abstract

The utility model relates to a pressure-balanced type mechanical telescoping ram which is used for carrying various measuring pole plates of downhole instruments for oil field logging. The utility model comprises fourteen components and parts which are a pressure balancing piston, a closed-type motor, an inner three-jaw supporting sleeve, an inner three-jaw spring push-pull rod, an outer three-jaw spring push-pull cylinder, etc. The utility model is characterized in that when the inner pressure and the outer pressure are balanced, an inner cavity of a downhole instrument casing is filled with silicone oil; the downhole oil temperature of the instrument increases along with the increase of the well depth; thus the volume of the instrument is expanded to push the piston to move outwards, and furthermore, the pressure of liquid in the cavity and the pressure of liquid outside the cavity are balanced. Only under the condition that the inner pressure and the outer pressure are consistent, the inner three-jaw spring push-pull rod and the outer three-jaw spring push-pull cylinder can respectively and freely push an inner spring and a rectangular outer spring under the support of the inner three-jaw supporting sleeve and the driving of the closed-type motor; therefore, when opened, the pole plate has sufficient force to be appressed with a well wall; when closed, the pole plate can be closed tightly to be pulled out of a well bore easily. The telescoping ram solves the problems of high cost or insufficient force of being appressed with a well arm which causes difficulty in opening a pole plate arm of a deep well in the prior art.

Description

The pressure balance type mechanical pusher

Technical field:

The utility model relates to a kind of oil reservoir logging and carries the pressure balance type mechanical pusher that various downhole probe measuring pads are used.

Background technology:

Present domestic oil reservoir logging is carried the backup instrument that various downhole probe measuring pads use and is mainly contained two kinds, a kind of is hydraulic sidewall contact device, be full of hydraulic oil in this instrument chamber, rely on motor, pump, valve is opened or is closed and disturbs the pole plate arm, rely on pressure piston to keep the internal and external pressure balance of downhole instrument, function admirable is reliable but involve great expense, the difficulty of using in enormous quantities is big, another is differential mechanical pusher, instrument internal is not oil-filled, and there is pressure reduction in instrument at the down-hole external and internal pressure, relies on motor to promote the pole plate arm and opens and close up, though cost is low, but when deep-well pressure reduction great disparity had the pole plate arm not open often, simple in structure, the recline power of the borehole wall of pole plate was not enough, main force's spring exposed outside not easy cleaning very easily get rusty again, easily lose the elasticity shortcoming.

The utility model content:

In order to overcome the deficiencies in the prior art, the utility model provides a kind of pressure balance type mechanical pusher, this telescoping ram performance is made Jie and is all got involved between fluid pressure type and the differential telescoping ram, the pole plate wall energy is opened freely and is closed up in the deep-well environment, and the recline power of the borehole wall of pole plate is big, main force's spring is not exposed outside, easy-maintaining.

The technical scheme that its technical problem that solves the utility model adopts is: pressure balance piston and closed motor are screwed after all relying on its urceolus to peg graft, the three-jaw end of support set is screwed after pegging graft in the shell connector of airtight motor and the three-jaw, then the stifled back of pegging graft of the sealing of support set in the three-jaw and shell is compressed with swivel nut, support set outer cover rectangle outer spring in the three-jaw, built-in inner spring; The built-in three-jaw inner spring of three-jaw outer spring push-and-pull tube pull bar, the two passes inner spring jointly, its lower end, the stifled back of sealing is connected with ramuscule arm axle pin, pole plate arm and lantern body, little support arm and pole plate arm, a pole plate and a pair arm, paying arm all is connected with pivot pin with lantern body, lantern body is stifled with sealing, housing connects with bolt, the characteristics of pressure balance type mechanical pusher are internal and external pressure balance, promptly in the chamber of downhole instrument housing, be full of silicone oil, increase oil temperature with well depth increases this instrument in the down-hole, volume is splashed and is risen, promoting piston outwards moves, make interior liquid of cavity and the fluid pressure balance outside the chamber, only under the driving at motor under the support that could guarantee three-jaw inner spring pull bar and three-jaw outer spring push-and-pull tube support set in three-jaw under the situation of external and internal pressure unanimity, distinguish promotion inner spring freely, the rectangle outer spring, when being opened, pole plate have enough power to be close to the well arm, when closing up, can close and pull out pit shaft smoothly, finish test.

The beneficial effects of the utility model are, the telescoping ram pressure balance is convenient to the folding of deep-well pole plate freely, and the pole plate power that reclines is big, and cost is significantly less than hydraulic sidewall contact device, and is easy to maintenance, easy to utilize.

Description of drawings:

Fig. 1 is the utility model overall structure schematic diagram.

Among the figure 1, the pressure balance piston, 2, closed motor, 3, support set in the three-jaw, 4, three-jaw inner spring pull bar, 5, three-jaw outer spring push-and-pull tube, 6, the rectangle outer spring, 7, inner spring, 8, pole plate arm, 9, little support arm, 10, pole plate, 11, pay arm, 12, lantern body, 13, sealing is stifled, 14, housing.

The specific embodiment:

In Fig. 1, pressure balance piston 1 is screwed after all relying on its urceolus to peg graft with closed motor 2, the three-jaw end of support set 3 is screwed after pegging graft in the shell connector of closed motor 2 and the three-jaw, and the back of then support set in the three-jaw 3 and sealing stifled 13 being pegged graft compresses with swivel nut; Support set 3 external rectangle outer springs 6 in the three-jaw, built-in inner spring 7; Three-jaw outer spring push-and-pull tube 5 built-in three-jaw inner spring pull bars 4, with the two pass inner spring 7 jointly, its lower ends, stifled 13 back of sealing are connected with ramuscule arm 9 pivot pins, pole plate arm 8 and lantern body 12, ramuscule arm 9 and pole plate arm 8, pole plate 10 and a pair arm 11, pair arm 11 and lantern body 12, be pivot pin and connect, lantern body 12 and sealing block up 13, housing 14 usefulness bolts are connected.

Claims

1, a kind of pressure balance type mechanical pusher, comprise support set (3) in pressure balance piston (1), closed motor (2), the three-jaw, three-jaw inner spring pull bar (4), three-jaw outer spring push-and-pull tube (5), rectangle outer spring (6), inner spring (7), pole plate arm (8), little support arm (9), pole plate (10), pay arm (11), lantern body (12), sealing stifled (13), housing (14), it is characterized in that: the external rectangle outer spring of support set (3) (6) in the three-jaw, built-in inner spring (7); Three latch spring push-and-pull tube (5) built-in three-jaw inner spring pull bars (4), with the two pass inner spring (7) jointly, its lower end, sealing stifled (13) back is connected with little support arm (9) pivot pin.