CN210685934U - Oil pipe anchoring oil drain device - Google Patents

Abstract

An oil pipe anchoring oil drain device is characterized in that an outer shoulder is arranged outside an inner pipe, a pressure transfer hole is formed in the inner pipe, an upper sealing ring is arranged on the section of the outer shoulder, an inner shoulder is arranged inside a cone, a boss is arranged in the cone, a lower sealing ring is arranged in the lower portion of the cone, the cone is sleeved outside the inner pipe, the upper portion of the cone is matched with the section of the outer shoulder, a gap between the upper sealing ring and the outer shoulder is sealed by the upper sealing ring, the lower sealing ring is arranged below the pressure transfer hole, the boss is arranged below the outer shoulder, a slip sleeve is sleeved outside the cone, a slip is arranged on the cone through a window of the slip sleeve, an inner conical surface of the slip is matched with an outer conical surface of the cone, dovetail teeth of the slip are inserted into a dovetail groove of the cone, external threads of an anchor release joint are connected with internal threads on the lower portion of the slip sleeve, internal threads of the anchor release joint are connected with straight threads on the lower middle portion of, an oil drain hole is arranged below the upper thread of the cone, and the upper part of the cone is connected with a suspension joint.

Description

Oil pipe anchoring oil drain device

Technical Field

The utility model belongs to the pipe tubular column anchoring device that oil field oil recovery well was used, especially an oil pipe anchoring bleeder.

Background

The existing oil drainers are various in types, and most of the existing oil drainers are opened by using a sucker rod in a well to drain oil or opened by using a ground throwing tool to drain oil. If the sucker rod of these types of oil drains breaks off, the sucker rod can not be lifted out, and oil drainage can not be realized. For example, in 962385549, the supporting unlocking assembly of the oil drainer contacts with the oil drainage assembly to drain oil when lifting the oil pipe, and the oil drainer opens the oil drain when the oil pipe needs to be lifted due to misoperation of workers or new situations during the process of going into the well, so that the operation is unsuccessful. Also, for example, patent No. 00236345.4 oil drain of oil extraction pipe has the problem of the above patent (962385549 "a split oil drain of oil extraction pipe"). The operation error of the operating worker is caused by the fact that the operation of lifting the oil pipe is needed in the oil pipe discharging process and the habit which is difficult to change and is developed for many years, and the oil drain device can be opened for oil drainage.

In order to prevent the oil drain from producing midway actions during well descending, a starting device is locked by a pin, after the oil drain is well descended, the pin needs to be pressed into an oil pipe to be cut off, and an action mechanism of the oil drain can be started.

When the oil well pumps oil, the liquid column load is alternatively transferred on the oil pipe and the sucker rod along with the change of the up-down stroke of the oil pumping unit, so that the oil pipe is lengthened and shortened, and the low efficiency of the oil pumping unit is caused; the yield is reduced; the bending of the oil pipe reduces the service life, and the alternating action of the liquid column load on the oil pipe can also cause the oil pipe to be tripped and fall into the well. In order to avoid the problems, the oil pipe anchoring oil drain device is used on site and used for fixing the oil pipe and preventing the liquid column load from alternately acting on the oil pipe to stretch. In the process of construction of some oil-water wells, in order to prevent damage to downhole tools such as packers caused by shifting of a pipe column, a tubing anchor is connected to the tools. However, in order to prevent the tubing anchor from being anchored halfway during the process of going down the well, the conventional tubing anchor locks the starting device by using the pin, and the tubing anchor can be started to anchor the tubing anchor only by pressing the pin into the tubing to cut the pin after going down the well. Therefore, the existing oil pipe anchor also needs a pressing device, so that the construction cost and the construction time are increased, and the construction procedure is increased.

Disclosure of Invention

The utility model aims at designing an oil pipe anchoring bleeder overcomes the problem that above-mentioned technique exists, makes it can anchoring tubular column and draining to need not suppress equipment when anchoring tubular column and draining and step up in to the oil pipe column, reduce working costs and engineering time.

The purpose of the utility model is realized like this: the anchor releasing device comprises an inner pipe, a suspension joint, an upper sealing ring, a cone, a lower sealing ring, a slip sleeve and an anchor releasing joint, wherein an oil pipe internal thread is arranged at the upper part of the inner pipe, an oil pipe external thread is arranged at the lower part of the inner pipe, an outer shoulder is arranged outside the inner pipe, a pressure transmitting hole is arranged on the inner pipe and is positioned below the outer shoulder, the upper sealing ring is arranged at the section of the outer shoulder, an inner shoulder is arranged inside the cone, a boss is arranged in the cone and is positioned above the inner shoulder, the lower sealing ring is arranged in the lower part of the cone, the cone is sleeved outside the inner pipe, the upper part of the cone is matched with the section of the outer shoulder, a gap between the upper sealing ring and the lower sealing ring is positioned below the pressure transmitting hole, the lower part of the cone is matched with the middle section of the inner pipe, the gap between the lower sealing ring and the lower sealing ring, the boss corresponds to the pressure transfer hole, the slip sleeve is sleeved outside the cone, the slip is arranged on the cone through a window of the slip sleeve, the inner conical surface of the slip is matched with the outer conical surface of the cone, dovetail teeth of the slip are inserted into a dovetail groove of the cone, the slip can move radially when the cone descends, external threads of the anchor releasing joint are connected with internal threads of the lower part of the slip sleeve, internal threads of the anchor releasing joint are connected with straight threads of the lower middle part of the inner pipe, the slip is supported by the upper end surface of the anchor releasing joint, so that the slip cannot be separated from the cone, an oil drain hole is drilled below the upper threads of the cone, the upper part of the cone is connected with a suspension joint, the inner diameter of the suspension joint is smaller than the outer diameter of the outer shoulder, the distance from the lower end surface of the oil drain hole to the upper sealing ring is larger than the descending distance from the cone to the upper sealing ring when the slip is expanded and anchored on, the oil drainage hole is positioned below the lower end surface of the outer shoulder, and a wax substance is injected through the pressure transfer hole and filled in the pressure transfer hole and an annular cavity between the inner pipe and the cone.

The utility model has the advantages that: the wax matter that pours into is full of in passing the annular cavity between pressure hole and inner tube and the cone, in the pressure that makes the inner tube can not spread into the cone into, the cone can not move when going into the well, can not anchor midway, connects after going into the well the utility model discloses an oil pump during operation under, well temperature is higher than the temperature of wax matter, and the wax matter melts, and inner tube pressure is higher than the cone external pressure during the oil pumping, and pressure differential is used in the interior boss of cone, and the cone struts the slips anchoring on the sleeve pipe down. Therefore, the utility model discloses need not suppress equipment when starting its actuating mechanism, can reduce the operating expenses and engineering time.

Drawings

Fig. 1 is an assembly drawing of the present invention.

Detailed Description

An embodiment of the present invention will be described below with reference to fig. 1.

As shown in figure 1, the embodiment of the utility model comprises an inner tube 1, a suspension joint 2, an upper seal ring 3, a cone 4, a lower seal ring 5, a slip 6, a slip sleeve 7 and an anchor releasing joint 8, wherein the upper part of the inner tube 1 is provided with an oil tube internal thread, the lower part of the inner tube 1 is provided with an oil tube external thread, the outer part of the inner tube 1 is provided with an outer shoulder 1-1, the inner tube 1 is provided with a pressure transmitting hole 1-2, the pressure transmitting hole 1-2 is positioned below the outer shoulder 1-1, the upper seal ring 3 is arranged on the section 1-1 of the outer shoulder, the inner part of the cone 4 is provided with an inner shoulder 4-3, a boss 4-2 is arranged in the cone 4, the boss 4-2 is positioned above the inner shoulder 4-3, the lower part of the cone 4 is internally provided with the lower seal ring 5, the cone 4 is sleeved outside the inner tube 1, the upper part of the cone, the gap between the upper sealing ring and the lower sealing ring is sealed by the upper sealing ring 3, the lower sealing ring 5 is positioned below the pressure transmission hole 1-2, the lower part of the cone 4 is matched with the middle section of the inner pipe 1, the gap between the lower sealing ring and the lower sealing ring is sealed by the lower sealing ring 5, the boss 4-2 is positioned below the outer shoulder 1-1, the boss 4-2 corresponds to the pressure transmission hole 1-2, the slip sleeve 7 is sleeved outside the cone 4, the slip 6 is arranged on the cone 4 through the window of the slip sleeve 7, the inner conical surface of the slip 6 is matched with the outer conical surface of the cone 4, the dovetail teeth of the slip 6 are inserted into the dovetail groove of the cone 4 (the structure of the slip and the cone on the Y221 packer used in an oil well is the same, and the technical personnel in the field know), the slip 6 can move radially when the cone 4 goes down, the external thread of the anchor-, the internal thread of the anchor releasing joint 8 is connected with the straight thread 1-3 at the lower middle part of the inner pipe 1, the upper end surface of the anchor releasing joint 8 supports the slips 6, so that the slips 6 can not be separated from the cone 4 (the same as a Y221 packer), an oil drainage hole 4-1 is drilled below the upper thread of the cone 4, the upper part of the cone 4 is connected with the suspension joint 2, the inner diameter of the suspension joint 2 is smaller than the outer diameter of the outer shoulder 1-1, the distance between the lower end surface of the oil drainage hole 4-1 and the upper sealing ring 3 is larger than the down stroke distance when the cone 4 descends to expand and anchor the slips 6 on the sleeve, so that the liquid flow in the inner pipe 1 can not leak when the anchor is anchored on the sleeve, the lower end surface of the suspension joint 2 reaches the upper end surface of the outer shoulder 1-1, the oil drainage hole 4-1 is positioned below the lower end surface of the outer shoulder 1-, the oil drainage hole 4-1 can be communicated with the pressure transmission hole 1-2, a wax substance is injected through the pressure transmission hole 1-2, and the injected wax substance is filled in the pressure transmission hole 1-2 and an annular cavity between the inner pipe 1 and the cone 4. The boss 4-2 is arranged in the cone 4 to increase the firmness of the hanging cone 4 and prevent the cone 4 from moving in the process of going down the well.

When going into the well, the utility model discloses install on the oil-well pump, go into in the well along with the oil pumping tubular column. When the oil pump works, the well temperature is higher than the temperature of the wax, the wax melts, the pressure in the inner pipe 1 is higher than the pressure outside the cone 4 when the oil pump pumps oil, the pressure difference acts on an inner shoulder 4-3 of the cone 4, and the cone 4 downwards props up the slip 6 and is anchored on the casing pipe. When the pipe column is lifted, the pipe column is lifted and rotated, the anchor releasing joint 8 is supported on the inner wall of the casing pipe by the slips 6 and is still, when the pipe column is rotated, the inner pipe 1 rotates, the anchor releasing joint 8 descends under the action of threads, the cone 4 is hung at the outer shoulder 1-1 by the hanging joint 2, when the anchor releasing joint 8 descends relative to the inner pipe 1, the distance between the anchor releasing joint 8 and the cone 4 is increased, the slips 6 can retract the anchor, meanwhile, the oil drainage hole 4-1 and the pressure transmission hole 1-2 can be communicated for oil drainage, oil on the inner pipe 1 can be drained into the casing pipe, and the oil pumping pipe column can be smoothly lifted.

The number of the slips 6 is 3-6, and the slips are evenly distributed on the slip sleeve 7.

The inner tube 1 can be designed as an assembly, which saves material and processing costs.

The internal thread of the anchor releasing joint 8 is a left-hand thread, and the corresponding straight threads 1-3 at the lower middle part of the inner pipe 1 are also left-hand threads.

The joint of the anchor releasing joint 8 and the slip sleeve 7 needs to be subjected to anti-tripping treatment, so that the anchor is prevented from being tripped at the joint when the anchor is released.

Claims (1)

1. The utility model provides an oil pipe anchoring bleeder, includes inner tube (1), hangs joint (2), goes up sealing washer (3), cone (4), lower sealing washer (5), slips (6), slip cover (7), break down anchor joint (8), and there is the oil pipe internal thread upper portion of inner tube (1), and there is the oil pipe external screw thread lower part of inner tube (1), characterized by: the outer part of the inner pipe (1) is provided with an outer shoulder (1-1), the inner pipe (1) is provided with a pressure transfer hole (1-2), the pressure transfer hole (1-2) is positioned below the outer shoulder (1-1), the section of the outer shoulder (1-1) is provided with an upper sealing ring (3), the inner part of the cone (4) is provided with an inner shoulder (4-3), the cone (4) is internally provided with a boss (4-2), the boss (4-2) is positioned above the inner shoulder (4-3), the lower part of the cone (4) is internally provided with a lower sealing ring (5), the cone (4) is sleeved outside the inner pipe (1), the upper part of the cone (4) is matched with the section of the outer shoulder (1-1), the upper sealing ring (3) is used for sealing a gap between the upper sealing ring and the lower sealing ring (5) is positioned below the pressure transfer hole (1-2), the lower part of the cone (4) is matched with the middle section of the inner pipe (1), a gap between the lower part of the cone (4) and the inner pipe (1) is sealed by a lower sealing ring (5), the boss (4-2) is positioned below the outer shoulder (1-1), the boss (4-2) corresponds to the pressure transfer hole (1-2), the slip sleeve (7) is sleeved outside the cone (4), the slip (6) is arranged on the cone (4) through a window of the slip sleeve (7), the inner conical surface of the slip (6) is matched with the outer conical surface of the cone (4), the dovetail teeth of the slip (6) are inserted into a dovetail groove of the cone (4), the cone (4) can move radially when moving downwards, the outer thread of the anchor releasing joint (8) is connected with the inner thread at the lower part of the slip sleeve (7), the inner thread of the anchor releasing joint (8) is connected with the straight thread (1-3) at the lower middle part of the inner pipe (1), the upper end surface of the anchor releasing joint (8) supports the slip (6) to ensure that the slip (6) cannot be separated from the cone (4), an oil drainage hole (4-1) is drilled below the upper thread of the cone (4), the upper part of the cone (4) is connected with a suspension joint (2), the inner diameter of the suspension joint (2) is smaller than the outer diameter of the outer shoulder (1-1), the distance between the lower end surface of the oil drainage hole (4-1) and the upper sealing ring (3) is larger than the downward stroke distance when the cone (4) descends to ensure that the slip (6) is expanded and anchored on the sleeve, the lower end surface of the suspension joint (2) is positioned below the lower end surface of the outer shoulder (1-1) when the upper end surface of the outer shoulder (1-1), a wax substance is injected through the pressure transfer hole (1-2), and the injected wax substance is filled in the pressure transfer hole (1-2), the inner pipe (1) and the cone (4) In the annular cavity therebetween.

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