Title:
Well flow head
United States Patent 2070326


Abstract:
This invention relates to a flow head for free flowing oil wells. In conventional practice heads for free flowing oil wells comprise a housing secured to the top of the casing and a cover plate having a port i communicating with a well tube, which extends into the well. The housing usually...



Inventors:
Weidinger, Karl W.
Application Number:
US883435A
Publication Date:
02/09/1937
Filing Date:
03/01/1935
Assignee:
Weidinger, Karl W.
Primary Class:
Other Classes:
137/553, 166/86.2, 166/97.1, 166/113, 251/192, 251/287, 251/310, 285/912
International Classes:
E21B34/02
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Description:

This invention relates to a flow head for free flowing oil wells.

In conventional practice heads for free flowing oil wells comprise a housing secured to the top of the casing and a cover plate having a port i communicating with a well tube, which extends into the well. The housing usually has two ports for the outlet of gas. In such a construction, in case any difficulty arises with the connections to the port or the valves in the tubing leading from 0 the port, it is necessary to "kill" the well and thus destroy its pressure before repairs can be made. Because of the position of the well tube, mechanism suggested for closing the gas ports has been complicated and expensive.

An object of this invention is to provide valve mechanism which is simple in constr',tion, economical to manufacture and effcient in operation, and by which the gas ports in the housing of a flow head may be closed and opened at will, 0 without affecting the flow through the well tube, and with provision of full clearance for the passage of well tools.

Another object of this invention is to provide in a flow head housing having two ports for the 5 delivery of gas from the well, valve mechanism by which both ports may be opened or closed, or either port may be opened while the other is closed.

Another object of the invention is to provide 0 in connection with such valve mechanism, indicating devices which will show the position of the valve mechanism.

Other and specific objects will be apparent from the following detail description taken in con5 nection with the accompanying drawings.

Fig. I is a vertical section of a flow head embodying this invention; Fig. 2 is a horizontal section; Pig. 3 is an elevation of a valve member em0 ployed in the embodiment shown in Figs. 1 and 2; Fig. 4 is an inverted plan view of the valve member; Figs. 5, 6, 7 and 8 are sectional views showing a modification with the valve member turned in 5 different relationships; Fig. 9 is an elevation of the valve member used in the modification shown in Figs. 5, 6, 7 and 8; Fig. 10 is an elevation of a flow head embodying the invention; 0 Fig. 11 is an enlarged detail; and Pig. 12 is a section on line 12-12, Fig. 11.

In the embodiment specifically shown in the drawings a housing I engages the top of a casing 2 and has a cover plate 3. The cover plate 3 has 5 a port 4 communicating with a well tube 5 which, as specifically shown, is in threaded engagement with the head 3 and extends into the well. The housing I has two ports A and B, into which may be inserted pipes to carry away gas from the well. The housing I has a conical seat 6, in which is fitted a conical valve member 7, having ports 9 adapted to register with the ports A and B. The valve member 7 is held in position by a jam nut 10, a washer II being interposed between the nut 10 and the valve member 7. A series of gear teeth 12 are cut in the periphery of the valve member 1 and are engaged by a worm gear or pinion 13, positioned in a recess or chamber 14 in the wall. of the housing and secured to a shaft 15, extending through the wall of the housing and having a hand wheel 16 on its outer end. Thus by turning the hand wheel 16 the valve member 7 may be rotated and the ports 9 moved into and out of registry with the ports A and B as desired.

In the embodiments shown in Figs. 5 to 12 inclusive the ports, identified as 17 and 18, in the valve member 7, are elliptical, as distinguished from the other embodiments where similar ports 9 are round, and are arranged in such a manner that the ports A and B both may be opened or closed, or either may be opened while the other remains closed. In this embodiment, the exposed part of the shaft 15 is threaded to engage a follower nut 19, which carries a pointer 20, cooperating with an indicating dial 21, to indicate the position of the valve and the condition of the ports.

In order to limit the movement of the valve member 7 lugs 22 may be formed on its bottom and adapted to cooperate with an abutment 23 formed on the housing. It is to be understood that the invention contemplates means for regulating those ports in the housing which are adapted to commmunicate with the casing permitting the escape of gas from the well. This invention is not concerned with the arrangement of the well tube 5, and its port, except, of course, that it permits the tube to project through the valve member 7, In the embodiment specifically illustrated the well tube 5 is secured to the cover plate 3 and in direct communicatlon with the port 4. It is to be understood, however, that this invention is applicable to other flow heads where such direct communication is not present but in which the well tube 5 extends centrally through a casing 2. The cover plate 3 is secured to the housing I, with a gasket 24 interposed therebetween, by studs 25.

The inner end of the shaft 15 is journalled in a socket 26 in the inner wall of the housing 1 adjacent the recess 14, which houses the worm 13.

The shaft 15 is also journalled in a bushing nut 27 Intermediate its ends. A packing gland 28 seals the shaft 15 in relation to the bushing 27. 6 The embodiment shown in Figs. 5 to 12 inclusive is capable of opening both ports A and B, closing both ports A and B, or opening either of said ports while closing the other one. This possibility is specifically illustrated in Figs. 5 to 8. Fig. 11 illustrates how the dial may be arranged to indicate the position of the valve member 7.

Thus when the pointer is at the first section, port A will be closed and port B will be open, the valve member 7 being in the position shown in Fig. 6. When the pointer is at the second section and in the position shown in Fig. 11, both ports will be open and the parts will be in the relationship shown in Fig. 7. Upon further rotation of the shaft 15 the valve member 7 will be brought to the position shown in Fig. 5 and the pointer will be brought to the third section of the dial, showing port A open and port B closed. Upon further rotation the valve member 7 will be brought to the position shown in Fig. 8 and the pointer will travel to the fourth section of the dial and indicate both ports closed.

A lock nut 29 threaded in the housing is superimposed upon the jam nut 10. Each of the nuts 10 and 29 have recesses 30 for the reception of a tool.

Because the valve member is lapped in its seat sand is prevented from reaching the recesses or gear box 14. Further such gear box is under little or no pressure and thus the packing between the shaft and the bushing may be simple as compared with a condition where the entire well pressure is encountered.

Another advantage of the invention is that the valve does not interfere with the passage of well tools when necessary for repair of the well. In such a case it is necessary only to remove the head, the central opening in the valve member 7 being substantially equal to the inside diameter of the casing 2.

It will be apparent from the foregoing description that a flow head embodying this invention is simple in construction and efficient in operation. Because of its construction its life will be substantially unlimited and thus avoid the necessity of repairs or replacements during the life of the pressure in a well, and avoid the necessity of killing the well in order to make repairs to the connections for the gas outlets and their valves.

Various changes may be made in the details of construction, within the scope of the appended claims, without departing from the spirit of the invention.

I claim: 1. A well flow head including a housing adapted to engage the walls of a casing and having a port, a cover plate for the housing with a port adapted to commmunicate with a well tube extending within the casing, a conical seat within the housing arranged concentric with the axis of the casing, a conical valve member fitted in said seat, surrounding the well tube and having a port adapted to register with the port in the housing, gear teeth on the periphery of the valve member, a pinion supported in a recess in the housing and engaging said gear teeth, a shaft for the pinion extending through the wall of the housing, and means on the outer end of the shaft by which it can be rotated and thereby rotate the pinion to turn the valve member and selectively cover and uncover the port in the housing.

2. A well flow head including a housing adapted to engage the walls of a casing and having a port, a cover plate for the housing with a port adapted to communicate with a well tube extending within the casing, a conical seat within the housing arranged concentric with the axis of the casing, a conical valve member fitted in said seat, surrounding the well tube and having a port adapted to register with the port in the housing, a jam nut engaging threads on the housing and pressing against the upper edge of the valve member to hold it on its seat, gear teeth on the periphery of the valve member, a pinion supported in a recess in the housing and engaging said gear teeth, a shaft for the pinion extending through the wall of the housing, and means on the outer end of the shaft by which it can be rotated and thereby rotate the pinion to turn the valve member and selectively cover and uncover the port in the housing. 3. A well flow head including a housing adapted to engage the walls of a casing and having a port, a cover plate for the housing with a port adapted to communicate with a well tube extending within the casing, a conical seat within the housing arranged concentric with the axis of the casing, a conical valve member fitted in said seat surrounding the well tube and having a port adapted to register with the port in the housing, gear teeth on the periphery of the valve member, a pinion supported in a recess in the housing and engaging said gear teeth, a shaft for the pinion extending through the wall of the housing, means on the outer end of the shaft by which it can be rotated and thereby rotate the pinion to turn the valve member and selectively cover and uncover the port in the housing, and cooperating elements on the valve member and the housing positioned and arranged to limit the rotation of the valve member. 4. A well flow head including a housing adapted to engage the walls of a casing and having a pair of ports, a cover plate for the housing with a port adapted to communicate with a well tube extending within the casing, a conical seat within the housing arranged concentric with the axis of the casing, a conical valve member fitted on said seat, surrounding the well tube and having elongated ports proportioned and arranged whereby said valve member may be turned selectively to open both of said ports, to close both of said ports, and to open either of said ports while closing the other, and means engaging the periphery of the valve member for rotating the valve member on its seat. 5. A well flow head including a housing adapted to engage the walls of a casing and having a port, a cover plate for the housing with a port adapted to communicate with a well tube extending within the casing, a conical seat within the housing arranged concentric with the axis of the casing, a conical valve member fitted in said seat, surrounding the well tube and having a port adapted to register with the port in the housing, a recessed chamber formed in the housing and open to the outer surface of the valve member, and means supported in said chamber for engaging and rotating the valve member.

6. A well flow head including a housing adapted to engage the walls of a casing and having a port, a cover plate for the housing with a port adapted to communicate with a well tube extending within the casing, a conical seat within the housing arranged concentric with the axis of the casing, a conical valve member fitted in said seat, surrounding the well tube and having a port adapted to register with the port in the housing, means inside the housing for engaging the outer surface of the valve member and rotating the same, and a shaft for operating said means extending through the wall of the casing.

7. A well flow head including a housing adapted to engage the walls of a casing and having a pair of ports, a cover plate for the housing having a port adapted to communicate with a well tube extending within the casing, a conical seat within the housing arranged concentric with the axis of the casing, a conical valve member fitted on said seat and having elongated ports proportioned and arranged whereby said valve member may be turned selectively to open both of said ports, to close both of said ports, and to open either of said ports while closing the other, a shaft extending through the wall of the casing, means on the shaft adapted to engage the outer surface of the valve member and rotate the same, a nut exterior of the casing and threaded on the shaft, a pointer carried by the nut, and a dial arranged in cooperative relationship with , the pointer to indicate the position of the valve member.

8. A well flow head including a housing adapted to engage the walls of a casing, a cover plate for the housing with a port adapted to cormunicate with a well tube extending within the casing, a valve seat on said housing surrounding and concentric with said tube, a port in said seat, a valve surrounding said tube positioned on said seat and having a port adapted to register with II the port in the housing, and means exterior of said housing for operating said valve on the seat.

KARL W. WEIDINGER.