CN2483503Y - Apparatus for anchoring oil pipe in oil-field - Google Patents

Abstract

The utility model relates to a novel tube anchor device for oilfields, comprising a tube body, a tube piston, a slip with an arc periphery and a hollow cone. Under the action of the fluid column pressure in the oil tube of the pumping well, the clamp anchor is started, and the slip clamps on the tube wall induced by the expansion of the hollow cone, so the oil tube is anchored. The oil tube is lifted upward and the safety ring is cut off to realize the release of archor. The utility mode has advantages of simple structure, easy operation, safety and reliability.

Description

Oil field oil pipe anchoring device

The utility model relates to a kind of oil field oil pipe anchoring device, is applicable to oilfield pumping well down-hole oil tube grappling usefulness.

At present, oilfield pumping well down-hole oil tube grappling way is various, is broadly divided into two classes, and the one, Hydraulic Anchorage, this type product advantage is that grappling is easy to operate, but the most complex structure of existing product, grappling is unreliable, the difficulty of disanchoring.The 2nd, the mechanical type grappling, the advantage of such anchor is that grappling is reliable, shortcoming is the grappling complicated operating process, and the difficulty of disanchoring, and has stuck accident to take place.

The purpose of this utility model provides a kind of simple in structure, convenient, safe and reliable, oil field oil pipe anchoring device efficiently of operation.

The purpose of this utility model is achieved in that a kind of oil field oil pipe anchoring device, it is by tubular body, the tube-shaped piston body, periphery is the slips of arc, conulite is formed, the upper port of tubular body is provided with internal thread and connects with tubing round thread, the top periphery of tubular body is provided with the annular compartment that Open Side Down, annular compartment is stretched on tube-shaped piston body top, be provided with the hole that communicates with tubular body in the upper end of annular compartment, on the phase-contact surface of tube-shaped piston body below the hole and annular compartment, O-ring seal is housed, the tube-shaped piston body is fixed in the annular compartment by shear pin, the lower, outer perimeter of slips is provided with the unidirectional tooth that teeth directional makes progress, the bottom inner peripheral surface of slips is the conical surface, the middle part of slips is provided with spring housing, the upper end of slips is stuck in the lower edge of tube-shaped piston body, each slips lobe is by the collar that is positioned at unidirectional tooth top and spring location, the tapering of the male cone (strobilus masculinus) on conulite top is identical with the tapering of the inner conical surface of slips bottom, on the contact surface of conulite top and tubular body, establish two road O-ring seals, on the tubular body wall between the two road O-ring seals, be provided with the draining hole, between conulite lower lumen face and the tubular body outer wall safety collar is housed, it is corresponding with conulite inner chamber upper edge that the tubular body outer wall that is positioned at safety collar top is provided with annular boss, spring base on establishing annular boss and be enclosed within tube-shaped main body on the tubular body outer wall above the conulite is corresponding, is provided with external screw thread and oil pump thread connection in the lower end of tubular body.

Operating principle of the present utility model is to utilize head of liquid effect in the tubing in sucker rod pumping wells, start the slips anchor and under the cone dilating effect, slips tightly snapped on the casing wall, thereby play the effect of grappling oil pipe, when disanchoring as long as on carry oil pipe and cut off safety collar.

Below in conjunction with drawings and Examples the utility model is further described:

Fig. 1 is a structural representation of the present utility model.

By embodiment shown in Figure 1 as can be known, the utility model is by tubular body 1, tube-shaped piston body 5, periphery is the slips 8 of arc, conulite 9 is formed, the upper port of tubular body 1 is provided with internal thread and oil pipe 17 thread connection, the top periphery of tubular body 1 is provided with the annular compartment that Open Side Down, annular compartment is stretched on tube-shaped piston body 5 tops, be provided with the hole 2 that communicates with tubular body 1 in the upper end of annular compartment, on the phase-contact surface of tube-shaped piston body below the hole 25 and annular compartment, O-ring seal 3 is housed, tube-shaped piston body 5 is fixed in the annular compartment by shear pin 4, the lower, outer perimeter of slips 8 is provided with the unidirectional tooth that teeth directional makes progress, the bottom inner peripheral surface of slips 8 is the conical surface, the middle part of slips 8 is provided with spring housing, the upper end of slips 8 is stuck in the lower edge of tube-shaped piston body 5, each slips lobe is by the collar 16 that is positioned at unidirectional tooth top and spring 6 location, the tapering of the male cone (strobilus masculinus) on conulite 9 tops is identical with the tapering of the inner conical surface of slips 8 bottoms, on the contact surface of conulite 9 tops and tubular body 1, establish two road O-ring seals 11, on the tubular body wall between the two road O-ring seals 11, be provided with draining hole 10, between conulite lower lumen face and the tubular body outer wall safety collar 12 is housed, it is corresponding with conulite inner chamber upper edge that the tubular body outer wall that is positioned at safety collar 12 tops is provided with annular boss 15, spring base 17 on establishing annular boss 7 and be enclosed within tubular body 1 on the tubular body outer wall above the conulite is corresponding, is provided with external screw thread and oil pump 14 thread connection in the lower end of tubular body 1.

The course of work of the present utility model is as follows:

Begin in the oil pumping process at the startup oil pumper, fluid pressure is delivered to piston 5 by hole 2 in the oil pipe 18, along with liquid level in the oil pipe constantly raises, the axial force that tubular piston body 5 bears is increasing, when this power surpasses the shearing that shear pin 4 can bear, then shear pin 4 is cut off, tubular piston body 5 glides along tubular body 1 central tube, and promotion slips 8 arrives conulites 9 places, tubular piston body 5 continues descending, and then slips 8 opens under conulite 9 effects and is stuck on sleeve pipe 13 inwalls, because slips 8 is unidirectional tooth design, make the package unit can only be descending, can not be up, when reaching oil pipe 18 stretching, extension maximum lengths, anchoring device is no longer mobile, thereby realize unidirectional grappling, whole grappling process is finished under hydraulic action fully automatically.

The process of disanchoring is such: on carry oil pipe 18, when upper lifting force surpasses the shearing that safety collar 12 can bear, then safety collar 12 is cut off, conulite 9 loses to support and is glided, after step 7 bottles up the slips anchor, slips 8 will separate with conulite 9, under the effect of spring 6, slips 8 is regained and no longer is stuck on the casing wall, and then the process of disanchoring is finished.

This device also has the bleeder function, and when conulite slides into certain position 9 times, then expose in draining hole 10, and the liquid in the oil pipe 18 are released.

Advantage of the present utility model is as follows: (1) is simple in structure, and the use operation is very convenient, safety can Lean on. (2) strong adaptability, this device maximum outside diameter is designed to φ 110mm, can adapt to mostly The number hole condition. (3) grappling down-hole oil tube, and make it to reach maximum naturally elongation, even the friction of pipe bar reaches Loss of plunger stroke drops to minimum, and pump efficiency is greatly improved, and has protected again oil pipe not to be subjected to extra load. (4) Small investment, high efficiency. (5) have the bleeder function concurrently.

Claims (1)

1, a kind of oil field oil pipe anchoring device, it is characterized in that it is by tubular body (1), tube-shaped piston body (5), periphery is the slips (8) of arc, conulite (9) is formed, the upper port of tubular body (1) is provided with internal thread and oil pipe (17) thread connection, the top periphery of tubular body (1) is provided with the annular compartment that Open Side Down, annular compartment is stretched on tube-shaped piston body (5) top, be provided with the hole (2) that communicates with tubular body (1) in the upper end of annular compartment, on the phase-contact surface of the tube-shaped piston body (5) of the below of hole (2) and annular compartment, O-ring seal (3) is housed, tube-shaped piston body (5) is fixed in the annular compartment by shear pin (4), the lower, outer perimeter of slips (8) is provided with the unidirectional tooth that teeth directional makes progress, the bottom inner peripheral surface of slips (8) is the conical surface, the middle part of slips (8) is provided with spring housing, the upper end of slips (8) is stuck in the lower edge of tube-shaped piston body (5), each slips lobe is by the collar (16) that is positioned at unidirectional tooth top and spring (6) location, the tapering of the male cone (strobilus masculinus) on conulite (9) top is identical with the tapering of the inner conical surface of slips (8) bottom, on the contact surface of conulite (9) top and tubular body (1), establish two road O-ring seals (11), on the tubular body wall between the two road O-ring seals (11), be provided with draining hole (10), safety collar (12) is housed between conulite lower lumen face and the tubular body outer wall, it is corresponding with conulite inner chamber upper edge that the tubular body outer wall that is positioned at safety collar (12) top is provided with annular boss (15), spring base (17) on being provided with annular boss (7) on the tubular body outer wall above the conulite and being enclosed within tube-shaped main body (1) is corresponding, is provided with external screw thread and oil pump (14) thread connection in the lower end of tubular body (1).