US1764473A

US1764473A - Liquid pump

Info

Publication number: US1764473A
Application number: US123629A
Authority: US
Inventors: Bernard H Scott; Samuel E Ross
Original assignee: SCOTT ROSS AND Co
Current assignee: SCOTT ROSS AND Co; SCOTT-ROSS AND Co
Priority date: 1926-07-20
Filing date: 1926-07-20
Publication date: 1930-06-17
Anticipated expiration: 1947-06-17

Description

v.lune 17, 1930. B.,H. SCOTTv ETYAL 1,764,473

LIQUID PUMP Filed July 20, '1926 SAMUEL A? 5.5.," Y

June 17, 1930.

54H. SCOTT ET AL LIQUID PUMPA l Filed July 2o. 1926 v 2 Sheets-'Sheet 2 .Z'N r/E/VTOQS; BERNARD cov-r SAMUEL f', oss.,

l & w

Patented vJune 17,

UNITED STATES .PATENT-j BERNARD n. s co'r'r, or GLENDALE, smeer. 1av Ross, orL'oNG' Banen,

ASSIGNORS T SCOTT-ROSS AND COMPANY, OF LOS ANGELES, CALIFORNIA, (30B POBATION 0F DELAW Lieum rum- Applicaties mainly 2o,- 1926. 'serial n0. mamav i This invention relates to the'pumping of'- Oil from a well and it particularly relates' to equipmentforjoperating a fluid-actuated pump. f The common form of pump used for pump- ,ing oil from a well-consists of a'reciprocat- ,ing pump which is situated near thelower connected to a walking beam by means of `which the' string of sucker rods is' recipro- 'cated and consequently the pump plunger is moved up andfdown.- A greater ercentage of the trouble with this form o pumping equipment is caused bythe sucker rods, which by necessity are quite small in diameter .and are veryv iiexible. The .trouble resulting from the sucker rods rises mainly from two' sources, the 'sucker rods uncouple by reason of a rotation 'of the pump plunger, and

the sucker rods break. by reason of the variable stresses which are placed thereon. Fluid-operated pumps have been used to a certain extent, these being advantageousfin-, "fjfasmuchas they do not require the use of a "'g'stringofsuckerrods and consequently do L `not have the troubles which accompany them. Fluid-operatedpumps are characteriz'ed by the factthat the pump mechanism at the lower 'end of the .wellis operated by a `fluid'under pressure which is pumped down into the well from the surface of the ground. It is an object of this invention to provide a novel arrangement of parts in a well for conducting the power-Huid for operating the pumpto the fluid-actuated pump,and for Otlier objects and advantages will be made 5 0 manifest hereinafter;

.gas space 19. Placed inthe oilstrinII conducting the pumped fluid tothe surface ,'ch

' of thel oil string 15. -Ex-tending vide' a pump `for forcing the power-fluid intol Referring to 'the drawings in which@ illustrate our invention,

Fig; 1 is a diagrammatic view showing 'the upper end of our invention. Y

Fig. 2 is a view showing-the lower end of our invention. A.

Fig. 3 is a plan view ofthe power-Huid pump of our invention.

Fig. 4 is a longitudinal'section of the pow- 4 er-fluid pump.

Fig. 5 is a section taken ontheline `55 ofFig.1.

Fig. 6. is a section taken on the line 6--6 Fig. 7 is a section takenionthe line 7-7 .'R-e erringparticularly to Figs .11 and 2 of -the drawings, the numeral 11 .represents a well in which a water string indicated by the numeral 12 is installed. Accordin to com-A mon practice, in the oil producingmdustry, the-water string is installed before o ilfbear- -ing sands represented bythe numeral 13 have"- been penetrated, the lower end o f the water v string. 12 beingcemented at 14 in order to eX- clude surface water from the well. Extend-l ing from the-surface of the ground through string 15. The oil' strin 15 projects into the extreme lower. end of t e wellthrough the Athe well inside the water string 12 an oil oil-bearin sands13, the lower end of the oil string 15 eing providedin the form of a.

screen pipe 16.; The upper end of the water string 12- is closed by ,a head-plate -18, land anlannular gas space 19isfformed inthe water string 12 around the oil string 15. A

pipe 20 is connected 'to the upper end of the' water'string12 for conducting` gas from the above the screen ipe 16 is a .packer 22W forms an outlet c amber 23in theupper end mto' the` tube 24 projecting through a coversplate25 24, which lower endiis situated near the low-l er end of the outlet chamber 'above the lower end of the reducer 28 is a pipe 29 which extends through an opening in the packer 22 to the lower end of the well 11. The pipe 29 is not in communication with the pressure chamber 27 but is connected to the outlet chamber 23 by openings 30 formed in the upper end'of the pipe 29 directly below' the reducer 28. Connected to the lower end of the pipe 29 is a fluidoperated pump V32 which may be of any operable construction. The lower end of the fluid-operated pump -32 is provided with a customary form of gas anchor 33. The pipe 29 provides an outlet passage 34 which is connected to the exhaust passage of the Huid-operated pump 32. An opening 36 is formed through the reducer 28, this opening communicating with the pressure chamber 27. Connected to the reducer 28 in communication with the passage 36 is a pressure pipe 37. This pressure pipe 37 is quite small in diameter, as shown, and extends downward through the outlet passage 34, being connected to the fluid-operated pump 32. Thepressure pipe 37 is connected to the fluid-operated pump 32 in such a manner that the uidunder pressure supplied thereb will operate the mechanism (not shown of the pump. Power-Huid is pumped into the pressure chamber 27 through a-power-iuidsupply line 39 which is connected to the ufpp'er end of the oil tube 24 by means of a' tting 40.

Referring to Figs. 1, 3, 4,4 and 5, the numeral 45 represents a pressure-fluid pump which is situated in aderrick 46 of the well for the purpose of forcing uid through the line 39 into the pressure chamber 27. The

pump 45 consists of a barrel 48 and a plunger 49. l The barrel 48 consists of a barrel member 50 in-which a plunger osleeve 51 of the plungerl 49 is adapted to reciprocate. The Y lower end of the barrel 48 isv provided with a standing ,valve 52 which is seated by means of a. spring 53, A pivot block 55 is connected to an inlet T 56 which is positioned below the standing valve 52. The pivot block 55 is pivotally supported on a shaft 57 which is supported by a .bracket 58. As shown in Figs. 1 and 5, the bracket 58 is situated adjacent to a lSamson post 59 of the derrick 46. YThe'barrel 48 is so supported that it may be pivotally swung in a vertical plane. The plunger sleeve 51 has a traveling valve 59 connected to the upper end thereof which is -resilient-ly closed by a spring 60. Secured to the cage of the travelingvailve 59 is a polish rod 61 of the plunger 49. This polish rod 61 4extends through a stuing box 62 of thebarrel 48, which stufling box is connected to. an outlet T 63 of the barrel 48. A bearing block 65 is connected to the outer end of the polish l rod 61. This bearing .block 65 is placed on a "pin 66 of a walking beam crank 67 of the derrick 46. The walking beam crank 67 is ordinary derrickA uipment and is secured to a shaft 68 which 1s rotated by means of a band wheel 69 secured thereto. A When the walking beam crank 67 is in operation, the plunger 49 is reciprocated in the barrel 48 but the outer end thereof is moved through a circular path. Forthis reason the barrel 48 must be supported so that itwill swing in a vertical plane with the plunger 49 as the walking beam crank 67 operates.

A fiuid supply tank 71 is supported near the derrick 46 as shown, this fluid supply tank 71 being supplied with pumped iuid through a supply line 72 which extends from the upper end of the outlet chamber 23 formed inthe upper end of the oil str' 15. Fluid is conducted from the'supply t 71 to a suitable storage by means of a pipe 73. A flexible inlet line 74 is connected to the lower part of the supplytank 71 and is connected as shown clearly in Fig. 5, to the inlet T 56 ofthe pump barrel 48. As the pumpl operates', Huid is drawn into the lowerend of the barrel through theflexible'inlet line 74. Connected to the outlet T 63 is a rigid outlet pipe 76. Positioned adjacent Y to the bracket 58 (Fig. 5) is a swivel joint 77 having

parts

78 and 79 which are pivoted together on the same axis as the pivotal axis of the pumpbarrel 48. The member 78 of the swivel joint 77 is connected to the rigid, outlet pipe 76, and the member 79 is connected to the supply line 39 which is connected by means-ofthe fitting 40 to the upper end ofthe pressure chamber 27. The swlvel joint 77 is absolutely necessary for the operation of the pump because of the fact that the rigid 'outlet pipe 76 must swing .with the .pump barrel 48.- It would not be practical to make the outlet pipe 76 from a flexible tube, since it must carry a Huid under .considerable pressure.

Duri the outward stroke of the' plunger 49, fluid which in this case is oil, situated in the barrel 48 above the traveling valve 59, is

forced therefrom through the outlet T 63 into the rigid outlet pipe 6. From thence it travels through the swivel joint 77, the power-fluid suply line 39 andthe fitting 40 into this time the pressure chamber 27 During1 h h t rou oil is drawn from the sup ly tank the iexible inlet 79 into t e lower end of t e barrel 48 which is below the traveling valve 59. During the inward or downward stroke of the plunger 49 the standing valve 52, which was previouslyopen, immediately closes and the workin p opened. O11 trapped in the space between the standing and working

valves

52 and 59 is forced into the upper portion of the barrel above the traveling valve 59. It should be noted that since the polish rod 61 extends through theupper part of the barrel 48 the valve 59, which -.was closed, is

ltr

area thereof is substantially one-half the area p of that portion of the barrel below the traveling valve 59. For this reason the pump 45 win be double gering; that is, @ii M11 be A monconstruction and it is therefore not-necessary to show the construction thereof. This pumped through the rigid outlet pipe 76 during both strokes of the plunger. This is true because the volume of oil forced into the upper part of the barrel 48 is twice the volume of the upper part of the barrel; therefore, onehalf this oil must flow from the upper part vof the barrel through the outlet T 63 and into the pressure chamber 27 through the interconnecting parts.

The fluid or oil under pressure in the pressure chamber 27 flows through the passage 36 of the reducer 28 into the pressure pipe 37 by means of which it is conducted to the fluidoperated pump 32. The fluid-operated pump, as previously described, may be of any compower-fluid operates the mechanism of the fluid-operated pump 32 and causes itvto pump oil from the lower end of the well 11 upward through the outlet passage 34. Thepowerfluid is preferably exhausted into the outlet passage 34 and conducted to the surface of the ground with the pumped fluid. The pumped fluid passes upward through tlie outlet passage 34 and through tlie openings 30 into the outlet chamber 23. The oil flows upward through the outlet chamber 23 and passes into the pipe 7 2, by means ofwhich it is conveyed to the supply tank 71. The supply ta'nk 71 is kept full at all times so that af supply for the .pump will always be maintained. After the supply tank 71 is filled, however, the additional fluid pumped thereto will be conducted through the pipe 73 to a suitable storage or place of use. Any gas which may tend to collect in the Well 11 passes upward around the oil string 15 into the gas space 19 formed at the upper end of the well, this gas being conducted from .the well through the pipe 20 rI hel arrangement of the piping in the Well 11 is an important feature of the invention.

' The design is such that the construction is economical. y The oil string 15 is always installed in a well immediately after the oilbearing sand has been penetrated. Whenvinstalling ther parts of our invention the fluidoperated pump 32 is connected to the lower end of the pipe 29Mand is lowered into the l well, the small pressure-fluid pipe 37 being attached thereto at this time.

at the upper end of the pipe 29 and may be expanded into tight contact with the inner wall ofthe oil string 15 when the parts have arrived in properposition. As the fluid- 'operated pump 32 is being lowered into the well the reducer 28 and the oil tube 24`are connected to the upper end of the pipe 2?. The use of the `pressure-fluid pipe 28 is economical and may extend a greater por-f tion of the length of the well. The features of using the reducer-and connecting the pipe 29 to the lower end of the oil tube24 is im-l The packer- 22 is of common construction and is placed portant to the invention, since it permits the use of a comparatively large outlet passage 34, which is desirable. The oil tube 24 provides a pressure chamber 27 in the upper end of the well and thus eliminates the necessity for providing la pressure-fluid tank at the surface of the ground.

The power-fluid pump 45 is a very im-.

It is veryportant part of the invention. simple inconstruction and is very Vefficient in pumping the fluid under pressure to the pressure chamber 27. A very important part of this pump is that it may be driven from the' Walkingbeam'crank which is a usual part of the derrick equipment. The pump in itself is ofsmall cost and does not require any additional driving means other than the walking beam crank 67 which is present at every Well.

An additional feature of the pump 45 is. that it is double acting. l l

We claim as our invention:

In a pump of the character described, the

combination of: a pump barrel; means for eoy In testimony whereof, we have vhereunto set our hands at Los, Angeles, California, this 15th day of July, 1926.

- BERNARD H. SCOTT.

SAMUEL E. ROSS.