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Publication numberUS2095899 A
Publication typeGrant
Publication dateOct 12, 1937
Filing dateMar 27, 1934
Priority dateMar 27, 1934
Publication numberUS 2095899 A, US 2095899A, US-A-2095899, US2095899 A, US2095899A
InventorsYancey John R
Original AssigneeJ C Nicklos
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Bottom hole choke
US 2095899 A
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Description  (OCR text may contain errors)

i Oct. 12,@1937. J. YANCEY BOTTOM HOLE CHOKE Filed March 27, 1934 Patented Oct. l2, 1937 Bo'r'roM HOLE cHoKE John R.. Yancey, lflloust'on, Tex., assigner to J. C.

Nicklas Application March 27, 1934, Serial No. 717,569

11 claims. i

. The invention relates to an improvement in chokes to control the ow ,of uid, particularly of the type positioned in the pipes of a flowing well in order to restrict the flow therefrom.

It is one of the objects of the invention to provide a combination tubing and choke assembly wherein the choke assembly may be positioned ,in and removed from the well tubing while the tubing remains in position in the well.

Another object of the invention is to provide a removable well choke which can be run into or removed from position inMthe tubing by a setting tool.'

Another object of the invention is to provide a replaceable bottom hole choke assembly so that accurategauging ofthe well can'be had by replacing the choke without removing the tubing from the well.

Another object of the invention is to provide a bottom hole choke which is readily replaceable and through which circulation may be hadin order to wash the well.

Still another object of the invention is to provide a bottom hole choke which may be operated to wash the well but which will move to closed position to accomplish the choking action automatically when iiowing of the well is commenced.

A still further object of the invention is to provide a replaceable bottom hole choke which may be latched in position in the well bottom.

It is also an object of the invention to position the choke in any of the ow lines or tubing at the-surface of the well because the choke Fig. 1 is a central, vertical, sectional View showing the choke assembly latched in position in the tubing with the parts arranged as they will be during the flowing of the Well. V

Fig. 2 is a central, vertical, sectional view of the choke being removed from the well with the tool used to remove the choke shown in'position.`

Fig. 3 is a side elevation of the choke with the setting tool connected thereto illustrating one manner in which the choke may be lowered into the well. f a

Fig. 4- is a section taken on the line 4 4 of Fig. 2 and looking in the direction of the arrows.

As is well understood in the owing of wells to obtain oil and gas particularly, it is desirable to choke down the production of the well in order to comply with various statutes and in if desired.

(Cl. 16S- 2) order to control the escape of oil and gas from the formations;` It is the usual practice after the well'has been drilled to lower a tube of relatively small diameter into the well in order to facilitate the removal of the fluid. Such a tub;`

ing is indicated at 2 in Fig. 1, and is formed by coupling sections of pipe together until the lower end of the pipe has reached the elevation of production. 'f It is not uncommon for a strainer or illter to be carried vby the lower end of this tube, but in some instances the strainer is carried by the "casing, The present invention is susceptible for use in either type of equipment and is shown as located in the tubing 2 intermediate the ends thereof;

The lower end 3 of the tubing may serve as a support for the strainer, or other construction. The device has been illustrated as embodying a coupling 4 u and a housing 5. These two parts serve as connecting members between the tubing portions 2 and 3 and the tubing will be assembled'with vthe coupling and the housing in position at the time it is lowered into the well.

The housing 5 is in the nature of a nipple which l is formed with a seat 'I adjacent the lower end` to provide a stop for the choke assembly which i Heretofore considerable diiculty has been en# countered in choking the flow of iluid from a well at the surface because of the enormous presthe choke assemblirv sure encountered and difficulty has also been had y with attempts to adjust the choke at the bottom of the well due to the expansion and contraction of the materials and to the inaccuracy of adrjustment obtainable. With bottom hole chokes heretofore when the choke became worn and inaccurate it was then necessary to pull the entire string of tubing in order toreplace the choke. With the present invention, however,l it is contemplated that the choke or choke assembly 8 will be made up as a unitary device as best seen in Fig. 3, which could either be dropped into the tubing and settled by gravity by the set up, or it could be lowered into the tubing bythe setting` Fig. 3 shows the setting tool I0 as 'being equipped with a plurality of expansible fingers I I which are arranged to engage the inside surface l2 I,of the choke assembly, it being understood that the choke assembly will be passed on to the fingers II while the device is at the surface. The tool I can then be run into the well either on a string of rods or cable, and the choke passed into the housing 5 so that it will assume A its proper position, such as shown in Fig. 1;

In order that the choke assembly will be retained in its proper position in spite of the pres--y sure in the well bore, the latching fingers I5 have been provided in the coupling 4. These latches are held in position by screws as at I6 and are 4curved so that they project into the normal passage in -the tubing. These lingers are inclined downwardly to provide a shoulder I 1 and the contact end I8. When the choke assembly is lowered into position it will engage the shoulder |1on the fingers and cause them to be spread apart so that the assembly can pass into the housing 5. As soon, however, as the upper end 20 of the assembly passes the contact ends I8, the latches will spring inwardly to hold it against upward movement. An upward pull on the setting tool I 0 results in the withdrawal of the tool from the assembly so that it is properly positioned for operation.

When it is desired to remove the choke assembly a spear or other suitable pulling'tool such as 2| can be lowered into the well bore to engage it. This tool 2| is shown as having an enlarged portion 22 which engages the latches I5 to present them outwardly beyond the normal periphery of the choke assembly 8. Projecting below the enlarged portion 22 on the tool 2| is the spear or grapple 23 which is arranged to engage the inside surface I2 of the choke assembly so that the assembly can be removed. Any type of lreleasable spear can be used for this purpose.

The choke assembly per se is made up of the base 30 which has an enlarged chamber 3| therein. To the upper end of this base 30 is a connection 32 which may serve as a support for the sealing members Sand which is surmounted by the cap 34 of the choke assembly. The choke y member 35, by which restriction of the flow is obtained, is positioned in the chamber 3| and has a tapered upper end 36 thereon which is arranged to engage with a cooperating shoulder 31 on the lower end of the connection 33. Thus, these parts will be accurately iitted in ,order to form a seat for the choke member during the choking operation. The`choke member 35 is shown in section in Fig. 4, and is made up of the body portion 39 and the wings 40 thereon, so that a ow of fluid may be had around the outside of the choke member through the passages 4| which are defined by the body and wings of the choke member and the chamber 3|.

The wing 40 of the choke member extends below the body, as seen at 42 in Fig. 1, and there is a pressure chamber 43 formed in the lower end of the body which is reduced to form the orifice 44.

The choke member is freely movable in the chamber 3| and has a limited sliding movement in the chamber. Fig. 1 shows the choke member in upper position where the choking action is performed, whereas Fig. 2 shows the choke member in its lowermost position so that there may be a ow of iluid around the choke member in either direction. This may be saidto be the inoperative or non-choking position because the fluid around the choke. In operation of the device the tubing may be positioned without the choke4 assembly.r The assembly can then be lowered into the tubing either with the setting tool I0, or it may be dropped into the tubing so that it may fall by gravity. In either instance it will pass the latches I5 and seat upon the shoulder 1. If it is then desired to wash the well or circulate fluid therethrough, the pressure downwardly on the choke member will cause it to move to the position shown in Fig. 2, so that a considerable volume of liquid may be pumped downwardly around the choke member. When, however, the well is ready to produce, the pressure relieved inside of the tubing 2 and the pressure in the well will then force the fluid upwardly through the tubing. When this pressure is exerted below the choke member in the pressure chamber 43 it will cause it to move upwardly from the position shown in Fig.- 2 to the position shown in Fig. 1 where a full choking action is obtained, because the parts 36 and 31 will set to form a seal, except for the passage 44. The greater the pressure in the well, the greater will be the setting of the choke member in position.

If, for any reason; however, the pressure in the well falls below that required to hold the choke in position the choke will fall by gravity and the production of the well will be thus increased by the ow of fluid around the member. When the pressure increases, however, the member will again rise upwardly and choke the now in` the manner intended. If the choke member becomes worn, or the amount of production from the well is to be changed, it is only necessary to go into the well with the tool 2| which moves the latches I5 to an inoperativeposition andI grasps the choke assembly by means of the spear 23 so that the choke assembly can be removed from the well. The choke member 35 can be replaced with a member of the proper size, or with a choke member which is true to gauge. The choke assembly can then be lowered into the well as previously described, and a simple and economical operation of the well obtained.

While the invention has been shown4 and described particularly as being positioned in the bottom of the well on the tubing the pipes 2 and 3 may be any flow line pipes` The choke assemblymay be inserted and removed from such ow line pipes in exactly the same manner as described regardless of whether the choke is in a vertical or horizontal position.

The invention broadly contemplates a replaceable choke member which can be positioned and removed without molesting the tubing, and through which the well may be washed or produced as desired.

I claim: f i,

1. A bottom hole choke forlwell tubing adapted to be lowered intoand removed from the ,Well as an independent member including a choke assembly, a choke member, cooperating means on the choke and the tubing to hold the choke in position, said choke member lbeing freely movable in i said assembly to choking or non-choking position, said means comprising a spring latch operable as the choke moves into position in the tubing.

2. A bottom hole choke forwell tubing adapted to be lowered into and removed from the well as an independent member including a choke assembly, a choke member, cooperating means on the choke and the tubing to hold the choke in from the well will pass through said assembly, l

a choke member mounted in said assembly for` position including spring fingers, said choke member being freely movable by gravity to non-choking pbsition but adapted to be raised to choking position by the flow oi' fluid to be' choked.

3. In combination .with a well tubing, a well choke assembly adapted to be lowered into' and removed from the tubing, and latching means consisting of spring fingers to automatically latch said choke assembly in position, said choke assembly comprising a housing formed with a restricted lower end and a second restriction spaced upwardly from its lower end, and a choke member formed with an upwardly tapering passage mounted within saidhousing for sliding movement between the restricted lower end thereof and said second restriction.

4. In a well. a tubing providing for flow of fluid from the well, a hollow choke assembly adapted to be lowered into said tubing to control flow of fluid f therethrough from the well, and to be removed from said tubing without removing the latter from the well, means carried on the outer wall of said assembly for sealing the same against the inner wall of the tubing, whereby flow of fluid from the well will pass through saidassembly, a choke member freely mounted in said assembly for relative movement with respect thereto under relatively high well pressure to position for restricting the area of flow of fluid through said assembly from the well, and relatively movable with respect to said assembly at relatively low well pressure to position for increased area of ow of fluid through said assembly from the well, and means for latching said assembly in flow controlling position in said tubing.

5. In a well, a tubing providing for flow of fluid from the well, a hollow choke assembly adapted to be lowered into said tubing to control flow of huid therethrough from the well, and to be removed from said tubing without removing the latter from the well, means carried on the outer wall of said assembly for sealing the same against the inner wall of the tubing, whereby flow of fluid from the well will pass through said assembly, 'a choke member mounted in said assembly for relative movement with respect thereto under relatively high well pressure to position for restricting the area of flow of fluid throughsaid assembly from the well, and relatively movable with respect to said assembly by gravity at relatively low well pressure to position for increased area of flow of fluid through said assembly from the well, and meansfor latching said assembly in flow controlling position in said tubing.

6. In a well, a tubing providing for flow of fluid from the well, a hollow choke assembly adaptedto be lowered into said tubing to control flow of fluid therethrough from the well, and to be removed from said tubing without'removing the latter from the well, means carried on the outer wall of-said assembly for sealing the same against the inner wall of the tubing, whereby flow of fluid relative movement with respect thereto under relativelyhigh well pressure to position for restricting the area of flow of fluid through said assembly from the well, and relatively movable with respect to said assembly by gravity at relatively low well pressure to position for increased area of flow of fluid through said assembly from the well, means for latching said assembly in flow controlling position in said tubing, and means for releasing said latching means and removing said assembly from said tubing.

7. In a well, a tubing providing for flow of fluid from the well. a hollow choke assembly adapted to be lowered into said tubing to control flow of fluid therethrough from the well. and to be removed from said tubing without removing the latter from the well, means carried on the outer wall of said assembly for sealing the same against the inner wail of the tubing, whereby flow of fluid from the well will pass through said assembly, a choke member freely mounted in said assembly for relative movement with respect thereto under relatively high Well pressure to position for restricting the area oi flow of uid through said assembly from the well, and relatively movable with respect to said assembly at relatively low well pressure to position for increased area of flow of fluid through said assembly from the well, and means for latching said assembly in flow controlling position in said tubing including springs which are depressed by said assembly moving into flow controlling position.

8. In a well, a tubing providing for ow of uid from the well, a choke assembly seat in said tubin ing, a hollow choke assembly adapted to be lowered into said tubing in engagement with said seat to control flow of fluid through the tubing from the well, and to b'e removed from said tubing without removing the latter from the well, means carried on the outer wall oi' said assembly for sealing the same against the inner wall of the tubing, whereby flow of' fluid from the well will pass through said assembly. a choke member freely mounted in said assembly for relative movement with respect thereto under relatively high well pressure to position for restricting the area of flow of fluid through said assembly from the well, and relatively movable with respect to said assembly at relatively low well pressure to position for increased area of flow of fluid through said assembly from the well, and means for latching said assembly in flow controlling position in said tubing.

9. In a well, a tubing providing for flow of fluid from the well, a hollow choke assembly adapted to be dropped into said tubing to control flow of fluid therethrough from the well, and tobe re-` moved from said tubing without removing the latter from the well, a restricted area in said tubing `to receive said assembly at flow controlling position, means carried on the outer wall of said assembly for sealing the same against the inner wall of the restricted area of said tubing, whereby flow of fluid from the well will pass through said assembly, a choke member freely mounted in said assembly for relative movement with respect thereto under relatively high pressure to position for restricting the area of flow of fluid through said assembly from the well and relatively movable with respect to said assembly at relatively low well pressure to position for increased area of flow of uid through said assembly from the well, and automatically operable means for latching said assembly in flow controlling position vin 10.`In a well, a tubing providing for ow of fluid from the well, a hollow hoke assembly adapted to be dropped into said -tubing to control flow of fluid therethrough from the well, and to be removed from said tubing without removing the said tubing when said assembly is dropped therelatter from the well, ay restricted area in said tubposition. means carried on the outer wall of said assembly for sealing the same against the inner wall ofthe restricted area of 'said tubing. whereby flow of iluid from the well will pass through said assembly, a choke member freely mounted in said assembly for relative movement with respect thereto under relatively high pressure to position for restricting the area of i'low ot uid through said assembly from the well and relatively movable with respect to said assembly at relatively low well pressure to position for increased area of ilow of iluid through said assembly from the well, automatically operable means for latching said assembly in ilow controlling position in said tubing when said assembly is dropped therein, and means for releasing said latching means and removing said assembly from said tubing.

11. rn combination with a wen tubing. a wen choke assembly for controlling flow of fluid therethrough i'rom the well, said assembly being adapted to be lowered into and removed from the tubing, latching means for automatically latching said choke assembly in ilow controlling position 'in said tubing, said assembly comprising a hous-

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2562415 *Aug 17, 1948Jul 31, 1951Norris ChaseSolution-mixing sprayer
US2582403 *Jul 21, 1947Jan 15, 1952A 1 Bit & Tool CompanyDeflector cleansing device
US2649914 *Mar 6, 1948Aug 25, 1953Otis Herbert CFlow guiding device
US2685891 *Jun 7, 1948Aug 10, 1954Segelhorst August LAutomatic fluid control means
US2921631 *Nov 15, 1957Jan 19, 1960Gage Lonnie LPlugging apparatus for well tubing
US2965173 *Apr 28, 1955Dec 20, 1960Brown Cicero CWell apparatus and methods of setting a plurality of tubing strings in a well bore
US4207925 *Nov 7, 1977Jun 17, 1980Wilson Industries, Inc.Reversible baffle plate
US4452277 *Feb 4, 1981Jun 5, 1984United Technologies CorporationAutomatic, fluid tight coupling
US4715794 *Sep 29, 1986Dec 29, 1987Vanhooser Neal EBottom-hole pump fluid flow controller
US5445225 *Sep 2, 1994Aug 29, 1995Wiggins, Sr.; Merl D.Choke for enhanced gas and oil well production
Classifications
U.S. Classification166/188, 166/195, 166/181, 166/167, 138/46, 285/23, 138/44
International ClassificationE21B34/08, E21B34/00
Cooperative ClassificationE21B34/08
European ClassificationE21B34/08