CN2303079Y

CN2303079Y - Anchoring means for oil pipe

Info

Publication number: CN2303079Y
Application number: CN 97240768
Authority: CN
Inventors: 青全英; 张明华
Original assignee: SJS Ltd
Current assignee: SJS Ltd
Priority date: 1997-04-30
Filing date: 1997-04-30
Publication date: 1999-01-06
Anticipated expiration: 2007-04-30

Abstract

The utility model relates to an oil pipe anchor which is a tool for anchoring an oil pipe on a sleeve pipe so as to prevent the oil pipe from moving up and down when an oil field adopts an oil pumping unit to extract oil. The oil pipe anchor is composed of a coupling hoop, a center pipe, a traction body, a friction block, a return spring, an upper conical body, a lower conical body, a slip cover, a bidirectional slip, a safety pin, a safety pin cap, a lower end joint, etc. The oil pipe anchor is characterized in that the bidirectional slip compresses the return spring under the conjunct action of the upper conical body and the lower conical body to make the return spring attached to the inner wall of a sleeve pipe; an oil pipe string is relatively fixed on the sleeve pipe, and the oil pipe string can not crawl along with the upper and lower motion of an oil pumping rod. The oil pipe anchor increases the oil extracting efficiency of an oil pump of the oil pumping unit and solves problems that the oil pipe string fractures after fatigue caused by the repeated telescopic motion of the oil pipe string along with the upper and lower motion of the oil pumping rod, and the oil pipe string falls into a well bottom. Thus, the oil pipe anchor is an ideal tool which can anchor the oil pipe string.

Description

Tubing anchor

A kind of tubing anchor of used for oil-field oil pumper, particularly a kind of tubing anchor of the upper and lower play of oil pipe when preventing oil pumping machine oil pumping.

Oil field by land, it generally all is to adopt oil pumper to drive oil pump to recover the oil that the middle and later periods of oil well recovers the oil, because oil pump is connected on the oil pipe, and oil pipe is to be in free elongation state in oil well, therefore, and when oil pumper drive sucker rod ceaselessly moves up and down, oil pipe is also made corresponding stretching motion with sucker rod, like this, the stroke of oil pump is reduced, reduce oil recovery efficiency, and oil pipe is in flexible up and down motion state repeatedly for a long time, easily produce fatigue, cause fracture, cause tremendous loss.

For overcoming above-mentioned difficulties, it is low to alleviate pumping efficiency, the loss of oil pipe break, people have adopted a lot of ways, and wherein a kind of way is exactly with the oil pipe grappling, the instrument that adopts is a kind of tension force anchor, but this instrument in use, because complex structure causes to set incessantly or the unfreezing difficulty, constantly have an accident, now banned use of by each oil field.

The purpose of this utility model is: provide a kind of can be on sleeve pipe with the oil pipe bidirectionally anchoring, make oil pipe not produce wriggling up and down, can not only improve the oil recovery efficiency of oil pump, and can avoid oil pipe string to be subjected to moving up and down of sucker rod and make repeatedly stretching motion and produce the fracture of tired back, oil pipe string is fallen into the problem in shaft bottom, and have multiple releasing method, the recovery of anchor tool is become simply, can reusable tubing anchor.

Technical solution of the present utility model is: a kind of tubing anchor, it is by box cupling 2, central tube 3, traction body 4, friction block 5, spring 6,

screw

7,8, alignment pin 9, screw 10, upper cone 11, slip sleeve 12, back-moving spring 13, bi-directional slip 14, lower cone 15, safety pin cap 16, screw 17, safety pin 18, screw 19, ○Xing Mifengquan 20, following end joint 21 is formed, be connected on the oil pipe string by box cupling 2 and following end joint 21, it is characterized in that: there is a traction body 4 the outer wall upper end of central tube 3, five brake pads 5 are housed on the traction body 4, between traction body 4 and brake pad 5, spring 6 is housed, the lower end of traction body 4 is connected with a slip sleeve 12 by screw 7, one upper cone 11 and lower cone 15 respectively are housed in the upper and lower side of slip sleeve 12, four hard tooth bi-directional slips 14 are housed between upper cone 11 and the lower cone 15, be connected by trapezoidal thread between upper cone 11 and the central tube 3, an alignment pin 9 is equipped with by screw 8 in the upper end of upper cone 11, screw 10 is equipped with at the middle part, between the middle part of bi-directional slip 14 and the slip sleeve 12 back-moving spring 13 is housed, the lower end of lower cone 15 is by the safety pin cap 16 that has been threaded, one screw 17 is housed on the safety pin cap 16, the central tube lower end is connected with end joint 21, on the following end joint 21 safety pin 18 is housed, screw 19 and ○Xing Mifengquan 20.

The utility model has the advantages that: the oil pipe bidirectionally anchoring on sleeve pipe, has been solved owing to the free sagging placement of oil pipe, and the pump efficiency loss that oil pipe brings thereupon wriggling up and down when sucker rod moves up and down has alleviated rubbing partially of rod collar and oil pipe; The fatigue fracture of avoiding oil pipe string to wriggle up and down and producing causes oil pipe string to fall into the accident in shaft bottom, has reduced operating cost, increases pump efficiency, and simple in structure, and operating maintenance is convenient.

That the utility model will be further described is as follows below in conjunction with accompanying drawing:

Accompanying drawing is the structural representation of tubing anchor.

This tubing anchor is sagging for solving the oil pipe string and the oil pump freedom that have oil-field oil pumper now, along with moving up and down of sucker rod, and the instrument that oil pipe string is wriggled up and down, it realizes its purpose by following examples.Lower end at oil pipe string is connected with a central tube 3 by box cupling 2, a traction body 4 is equipped with in the upper end of the outer wall of central tube 3, five brake pads 5 are housed on the traction body 4, upper cone 11 and lower cone 15 are housed below the traction body 4, between upper cone 11 and lower cone 15, bi-directional slip 14 is housed, safety pin cap 16 and following end joint 21 are housed below the lower cone 15.During use, each component is installed after on the outer wall of central tube 3, be connected on the oil pipe string by box cupling 2 and following end joint 21, put it in the sleeve pipe of oil well, owing between traction body 4 and the brake pad 5 spring 6 being housed, then brake pad 5 is close to internal surface of sleeve pipe all the time.After oil pipe string is put into the required degree of depth, the rotation pipeline string, because the effect of friction block 5, whole tubing anchor can be along with rotation, have only central tube 3 to rotate with oil pipe string, be that central tube 3 makes upper cone 11 to lower slider by trapezoidal thread, under the acting in conjunction of upper cone 11 and lower cone 15, bi-directional slip 14 compression reseting springs 13 make it attached on the internal surface of sleeve pipe, thereby make the oil pipe string relative fixed on sleeve pipe, reach and make the oil pipe string grappling, can not move up and down and produce wriggling with sucker rod, improve the pump efficiency of oil pump, and oil pipe string is on the sleeve pipe central axis.Tubing anchor with the oil pipe grappling after, rail applies certain pretension, can revise since during drilling well the deflection of oil well make oil pipe also be in the situation of deflection, oil pipe string is straightened, thereby can reduces rubbing partially between rod collar and the oil pipe.

In the time will tripping out oil pipe string, only need the reverse rotation oil pipe string and drive central tube 3 rotations, upper cone 11 is upwards slided, break away from bi-directional slip 14, bi-directional slip 14 is owing to lose support, under the effect of back-moving spring 13, turn back to initial position, thereby oil pipe string is affranchised, can trip out oil pipe string by normal procedure,, also can directly lift oil pipe string when feeling in this way at need, make lower cone 15 cut off safety pin 18 downwards, lower cone 15 is slipped to down downwards on the end joint 21, bi-directional slip 14 is lost support and the disengaging sleeve pipe, and oil pipe string can be removed.

When needs reuse this tubing anchor, change ○Xing Mifengquan 20 and safety pin 18, remove greasy dirt, can reuse.

Using this tubing anchor, can alleviate rubbing partially of sucker rod, prevent that oil pipe from wriggling up and down, improve pump efficiency, reduce operating cost, is the instrument of the optimal grappling oil pipe string in oil field.

Claims

1. tubing anchor, it is by box cupling (2), central tube (3), traction body (4), brake pad (5), spring (6), screw (7,8), alignment pin (9), screw (10), upper cone (11), slip sleeve (12), back-moving spring (13), bi-directional slip (14), lower cone (15), safety pin cap (16), screw (17), safety pin (18), screw (19), ○Xing Mifengquan (20), following end joint (21) is formed, be connected on the oil pipe string by box cupling (2) and following end joint (21), it is characterized in that: there is a traction body (4) the outer wall upper end of central tube (3), five brake pads (5) are housed on the traction body (4), lower end at traction body (4) is connected with a slip sleeve (1 2) by screw (7), one upper cone (11) and lower cone (15) respectively are housed in the upper and lower side of slip sleeve (12), between upper cone (11) and the lower cone (15) four hard tooth bi-directional slips (14) are housed, be connected by trapezoidal thread between upper cone (11) and the central tube (3), the lower end of lower cone (15) is by the safety pin cap (16) that has been threaded, one screw (17) is housed on the safety pin cap (16), the central tube lower end is connected with end joint (21), and safety pin (18) is housed on the following end joint (21), screw (19) and ○Xing Mifengquan (20).

2. tubing anchor according to claim 1, it is characterized in that: between traction body (4) and the brake pad (5) spring (6) is housed, an alignment pin (9) is equipped with by screw (8) in the upper end of upper cone (11), screw (10) is equipped with at the middle part, between the middle part of bi-directional slip (14) and the slip sleeve (12) back-moving spring (13) is housed.