CN2545363Y

CN2545363Y - Borehole flusher for oil production well

Info

Publication number: CN2545363Y
Application number: CN 02240211
Authority: CN
Inventors: 尹婷
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-06-11
Filing date: 2002-06-11
Publication date: 2003-04-16
Anticipated expiration: 2012-06-11

Abstract

The utility model discloses a downhole well washer of the oil well which solves the problem of the washing of a screw pump well. The utility model is characterized in that a center pipe at the top end of a screw pump is equipped with a circulate hole and that a core pipe at the bottom end of the pump is equipped with a communicating hole so that a tuning and the pump are washed, thereby avoiding the complicated process of raising a sucker rod, reducing the cost and washing the tubing thoroughly. The core pipe is sleeved with a seal cap, blocking the contact of a washing liquid and an oil layer, preventing the washing liquid from invading the oil layer and an oil pressing layer. During the normal oil extraction process, a working fluid level is tested anytime, since the communicating hole always communicate the tuning and an annular.

Description

Producing well down-hole well-washing device

The utility model relates to a kind of producing well underground work instrument, belongs to producing well down-hole well-washing device.

At present, no matter the oil well well-flushing is rod-pumped well or screw bolt well, and flushing fluid all contacts oil reservoir, thereby exists the problem that flushing fluid is invaded oil reservoir, pressed oil reservoir.For screw bolt well, because between rotor and the stator is interference fit, be not communicated with between the oil jacket, during well-flushing must on carry sucker rod so that rotor is extracted out from stator, could form the oil jacket communication passage, just can carry out well-flushing, this just needs to use equipment such as crane, also to increase the constructor, cause the well-flushing expense to increase, also just increase crude oil cost.The well-flushing valve of the band packer that people are manufacturing experimently because packer is divided into two parts up and down with annular space behind the well-flushing, can't solve the test problem of annular space producing fluid level when normally pumping, and well washing effect is undesirable.Up to the present, in the screw bolt well pumping and washing operation, do not press oil reservoir when yet there are no a kind of well-flushing, carry sucker rod on not and when normal oil pumping, can survey the well washing apparatus of annular space producing fluid level.

The purpose of this utility model is exactly not press oil reservoir when providing a kind of well-flushing in order to overcome above-mentioned the deficiencies in the prior art, carry sucker rod on not and can survey the producing well down-hole well-washing device of annular space producing fluid level when normal oil pumping.

The purpose of this utility model reaches by the following technical programs: this producing well down-hole well-washing device, form by screw pump, leather cup, spring, steel ball and sealing ring, and be characterized in:

A) upper end of screw pump is with thread connecting joint A, and joint A endoporus has the central tube of pressure guide hole and circulation port to be threaded; The central tube outer wall is with sliding sleeve and spring from top to bottom successively, and the central tube upper end is with thread connecting joint B; Joint B outer wall lower end is with the overcoat that is threaded, and the overcoat lower end is placed on the sliding sleeve; Between joint A and the sliding sleeve, between sliding sleeve and the overcoat, between overcoat and the joint B sealing ring is housed all;

B) screw pump lower end jointing C, joint C has the core pipe of intercommunicating pore to be threaded, be with the leather cup and the adjustable ring of band skeleton on the core pipe successively, between core pipe and the skeleton sealing ring is housed; The adjustable ring end holds out against with pipe nipple, between pipe nipple and the core pipe sealing ring is housed; Pipe nipple lower end endoporus is built-in with valve seat, is placed with steel ball on the valve seat, and the valve seat end holds out against with joint D.

The utility model compared with prior art can have following advantage: owing to have intercommunicating pore having on the central tube of screw pump upper end on circulation port, the core pipe in the screw pump lower end, when well-flushing, flushing fluid enter in the oil pipe by circulation port and intercommunicating pore and screw pump in and on return, realized not only the washing oil pipe but also washed pump.Like this, saved the complicated procedures of forming of carrying sucker rod on the one hand, used manpower and material resources sparingly; On the other hand, well-flushing is thorough, for later oil recovery lays the foundation.Owing on the core pipe, be with sealing cup, sealed the oil jacket annular space, flushing fluid can only be entered in the valve pocket by intercommunicating pore, and can not contact, thereby avoided flushing fluid to invade the drawback of oil reservoir, pressure oil reservoir with oil reservoir.Behind well-flushing during normal oil pumping, because intercommunicating pore is being communicated with oil pipe and oil jacket annular space all the time, the annular space producing fluid level carries out and presents variation with oil pumping, thereby can test at any time.

Accompanying drawing 1 is a structure chart of the present utility model.

The utility model is described in further detail below in conjunction with accompanying drawing:

By shown in Figure 1, this producing well down-hole well-washing device is made up of screw pump 9, leather cup 13, spring 4, steel ball 17 and sealing ring, is characterized in:

A) upper end of screw pump 9 is with thread connecting joint A8, and joint A8 endoporus has the central tube 5 of pressure guide hole 2 and circulation port 7 to be threaded; Central tube 5 outer walls are with sliding sleeve 6 and spring 4 from top to bottom successively, and central tube 5 upper ends are with thread connecting joint B1; Joint B1 outer wall lower end is with the overcoat 3 that is threaded, and overcoat 3 lower ends are placed on the sliding sleeve 6; Between joint A8 and the sliding sleeve 6, between sliding sleeve 6 and the overcoat 3, between overcoat 3 and the joint B1 sealing ring is housed all;

B) screw pump 9 lower end jointing C10, joint C10 has the core pipe 11 of intercommunicating pore 12 to be threaded, be with the leather cup 13 and the adjustable ring 15 of band skeleton 14 on the core pipe 11 successively, between core pipe 11 and the skeleton 14 sealing ring is housed; Adjustable ring 15 ends hold out against with pipe nipple 16, between pipe nipple 16 and the core pipe 11 sealing ring are housed; Pipe nipple 16 lower end endoporus are built-in with valve seat 18, are placed with steel ball 17 on the valve seat 18, and valve seat 18 ends hold out against with joint D19.

During well-flushing, when well-flushing pressure was low, flushing fluid was met on the steel ball 17 in intercommunicating pore 12 enters core pipe 11 and is returned, and enters through screw pump 9 and has cleaned screw pump 9 in the oil pipe; When well-flushing pressure raise, it is up that flushing fluid promotes sliding sleeve 6, and circulation port 7 is exposed, and flushing fluid returns the cleaning oil pipe on circulation port 7 enters in the oil pipe.Leather cup 13 Seal Oil covers annular space, that has blocked flushing fluid and oil reservoir contacts the phenomenon of well-flushing hydraulic pressure oil reservoir when having avoided well-flushing.When normally pumping behind the well-flushing, intercommunicating pore 12 remains the oil jacket channel connection, and annulus liquid level can be tested liquid level at any time with the variation that presents of oil pumping.

Claims

1. producing well down-hole well-washing device is made up of screw pump (9), leather cup (13), spring (4), steel ball (17) and sealing ring, it is characterized in that:

A) upper end of screw pump (9) is with thread connecting joint A (8), and joint A (8) endoporus has the central tube (5) of pressure guide hole (2) and circulation port (7) to be threaded; Central tube (5) outer wall is with sliding sleeve (6) and spring (4) from top to bottom successively, and central tube (5) upper end is with thread connecting joint B (1); Joint B (1) outer wall lower end is with the overcoat that is threaded (3), and overcoat (3) lower end is placed on the sliding sleeve (6); Between joint A (8) and the sliding sleeve (6), between sliding sleeve (6) and the overcoat (3), between overcoat (3) and the joint B (1) sealing ring is housed all;

B) screw pump (9) lower end jointing C (10), joint C (10) has the core pipe (11) of intercommunicating pore (12) to be threaded, be with the leather cup (13) and the adjustable ring (15) of band skeleton (14) on the core pipe (11) successively, between core pipe (11) and the skeleton (14) sealing ring be housed; Adjustable ring (15) is terminal to hold out against with pipe nipple (16), between pipe nipple (16) and the core pipe (11) sealing ring is housed; Pipe nipple (16) lower end endoporus is built-in with valve seat (18), is placed with steel ball (17) on the valve seat (18), and valve seat (18) is terminal to hold out against with joint D (19).