US2203595A

US2203595A - Device for use in wells

Info

Publication number: US2203595A
Application number: US75564A
Authority: US
Inventors: Elwin B Hall; Arthur L Armentrout
Original assignee: SECURITY ENGINEERING CO Inc
Current assignee: SECURITY ENGINEERING Co Inc
Priority date: 1936-04-21
Filing date: 1936-04-21
Publication date: 1940-06-04
Anticipated expiration: 1957-06-04

Description

June 4, 1940.

E. B. HALL El' AL DEVICE F012 USE IN WEL Filed April 2l, 1936 2 Sheets-Sheet 1 f aan.

June 4, 1940.

E. B. HALL ErAL DEVICE FOR' USE IN WELLS Filed lApril 2l', 1936 2 Sheets-Sheet 2 Patented June 4, 1940 i PATENTl OFFICE 2,203,595 e nEvIcE'roa USE 1N WELLS Elwin B. Hall, Los Angeles,

and Arthur L.

I Armcntront, Santa Maria, Calif., assignors, by

' direct and mesne assignments,

to Security Engineering Co. Inc., a corporation of California Application April 21, 193s, serial No. 75,564'

13 Claims.

This invention relates to a device or appliance for use in wells and it is a general object of the invention to provide a. simple, practical and improved device for facilitating the manipulation and operation of well tools.

Another object of this invention is to provide a device for connecting or associating a well tooly 15 invention is adapted to be employed in connection with well tools of various characters, for example, it may be employed with drilling tools, fishing tools, testing tools, etc. We will herein disclose the device or appliance of the present invention employed or combined with a well testing apparatus,

it being understood that the invention is not to be construed as restricted by this specific typica application of the linvention.

Another object of this invention is to provide an apparatus to be run into the well on a tubular test string and that embodies means whereby the string may be rotated and/or reciprocated in the well and, if desired, circulationl may be maintained 'to keep the string free for ready removal 3o from the well. The well testers heretofore introduced usually embodya tubular test string connected with the tester and packer proper by al non-rotatable connection. TheV heavy hydrostatic 'pressures in a'well force the packer or tester' against the formation to positively hold the tester against movement during the test. When l the test string is connected with the tester by a threaded connection or other usual means under the present practice, no circulation is maintained 40 and it is not possible to rotate the string during the test. `Often a well test is of considerable duration and the mud or solid matter in the well fluid settles about the test string and muds it or freezes it in the well, making it difiicult and sometimes impossible to remove the string or theY tester'` at the conclusion of thetest. The apparatus of the present invention embodies a swivel or rotatable connection and a circulation 50 uiddischarging means whereby the test string may be rotated and/or reciprocated as found necessary during the test, and circulation fluid may be continuously discharged into the well ad- 1 jacent the tester to `prevent the string from becoming frozen in the well so that a test of long duration may be made without danger of the apparatus becoming frozen inthe well bore.

Another object of this invention is to provide a well device of the character mentioned that is such that the tester or other tool may be fully 5 controlled, turned, jarred or otherwise manipulated in the well, as found necessary.

Another object of this invention is to provide a well tester embodying a rotatable connection between the test string and the tester proper that l0 may be clutched or engaged at the termination of the test to allow the test string carrying the rotatable connection to be unthreaded or released from the tester proper and withdrawn from the well. e

Another object of this invention is to provide ,a well tester of the character mentioned embodying ,a drillable or friable screen or liner that may be readily drilled up at the end of the test and following the disconnectionl of the test strings from 20 the tester leaving the well bore free and open for other operations.

Another object of this invention -is to provide a well testing apparatus comprising the combination of a drillable packer, a drillable liner, a test string for receiving the test iiuid, a circulation string for maintaining circulation in the well and a rotatable connection between the tester and the said `strings whereby the strings may be turned` and/or reciprocated and maintainedfree during I0 a long test while the tester remains stationary and may be manipuulated at the termination of the test to be disconnected from the liner and -the packer and removed from the well leaving the friable liner and packer in the well to be drilled up by drilling tools.

Another object of this invention is to providean yimproved well testing apparatus that is operable to make an extended test of the productivity of the well to obtain an uncontaminated sample 40 of the well fluid without danger of obstructing the well or necessitating expensive fishing operations. The various objects'and features of our invention will be fully understood from the following 46 detailed description of a typical preferred form and application of our invention, throughout which description reference is made to the accompanyingdrawings, in which: l

Fig. 1 is a side elevation of the principal parts 60 of one form of apparatus of the present invention showing it in the operative position in a well and illustrating the packer and the adjacent parts in vertical cross section. -Fig.- 2 is an enlarged longitudinal detailed sectional view ofthe rotatable connection and the adjacent parts of the tester shown in Fig-1. Fig. 3 is an enlarged vlongitudinal detailed sectional view of the valve and the adjacent parts of the tester. Fig. 4 is a transverse detailed sectional view taken substantially as indicated by line 4 4 on Fig. 2. Fig. 5 is a viewv similar to Fig. 1 illustrating another form of apparatus. Fig. 6 is an enlarged frag- The present invention as herein disclosed vre lates to the general class of well testing apparatus described and claimed incur co-pending application `entitled Method and apparatus for testing Wells led December 11, 1935, Serial No. 53,922,

rat-hole H to the opening I8.

now Patent No. 2,138,057, granted November 29,

The apparatus of the present invention illustrated in Figs. 1 to 4, inclusive, of the drawings, A

includes, generally, a test string 45, a tubular body II), a screen-or liner II detachably connected with 'the body I0 and adapted to extend into a rathole H inthe lower end of a well bore B, a packer I2 associated with the liner I I to pack off the well at the upper end of the rat-hole H, a valve I3 in the body Ill for controlling the liow of the test fluid into the string 45, and a device I4 normally forming a rotatable and slack connection between the test string 45 and the tester body IIJ.

The test string 45 is provided to conduct the test uid upwardly from the tester to the surface of the ground. 'I'he string 45 may be madel up of a' multiplicity of lengths of pipe'or tubing of suitable diameter. Thetester body I is a simple elongate tubular member which houses the valve l I3landcarries the liner II and packer I2. The particular body I0 illustrated in the drawings has a threaded pin I5 on -its upper end and hasa collar I6 threaded on its lower end. The threads connecting the collar I6 with the body. I0 are preferably left hand threads or arepitchedn the opposite direction to the threads in the string 45. A suitable'shear pin 9 may be arranged in openings in the body I0 and collar I 6. An an- .nular inwardly projecting ange II is provided on the interior of theb'ody I0 adjacent its upper end. 1.

The liner II is provided to receive the test uid or well fluid from the well and to `conduct it upwardly into the body I0. The liner II is an elongate member proportioned to readily enter the rat-hole H. A'central longitudinal opening I8 is-provided in the liner II and spaced ports I9 in the wall of the liner admit the fluid froml the In the preferred construction the liner I I is longitudinally tapered or of downwardly diminishingl diameter to be readily pulled from the rat-hole H in the event the rat-hole caves or sands up. The upper portion IIa of the liner II may be cylindrical and imperforate. -threaded into the coupling I5 whereby the liner is secured to the lower end of the body I0. The liner II is preferably formed of cast iron, 'rubber composition, or other material that may be readily broken up and drilled up by well drilling tools. v

''he packer I2 is provided to seal against the .shoulder X of earth lformation occurring at the upper end of the rat-hole H. The packer I2 is` operable to engage the shoulder X. to seal the well rotation of the tester.

The upper endof the liner II is*- bore B from the rat-hole H whereby the fluid enteringthe liner IIand the body I0 is uncontaminated b'y the rotarymud and fluid in the wellbore proper. The packer I2 is preferably formed of a drillable material to be readily drilled up by drilling tools. In practice the packer I2 may be in the form of va tubular member surrounding the upper portion IIa of the liner II. The packer I2 may be formed of ceinent, Bakelite, hardrubber composition, glass,lmarble or the like. The packer I2 is proportioned to enter and pass through the well bore B with suitable clearance. The lower end 2| of the packer I2 is adapted to seat on the shoulder X. In the particular case illustrated in the drawings the shoul-ll der X is downwardly and inwardly tapered and the lower end 2| of the packer I2 is correspondingly tapered to properly seat on. the shoulder. Fins or blades project from the lower end 2I to dig or bite into the shoulder X to prevent A counterbore 22 isprovided in the upper end of'the packer I2 to receive the coupling I6. l Packing 23 is arranged in the counterbore 22 to be compressed between the 4bottom wall of the counterbore andthe lower lend of the coupling I6. When the weight, or a portion of the weight, of the test string 45 and the associated parts is imposed on the packer I2 to force it against the seat X this force or weight is transmitted4 through the packing -23 so that the packing tightly seals about the liner portion IIa and tightly seals against the interior of the packer I2. The blades 2U are forced into the formation to hold the tester against rotation when the L drillable-packer I2. The springs 24 are bowed or e' curved to bear inwardlylgagainst the portion IIa of the liner. inward force on the liner portion IIa to dependably hold the packer I2 on the liner whenthc apparatus is run into .the well and are adapted to yield when the paeker-I2 is immovably caught and the liner II is moved upwardly. A basket 25 may be provided on the packer I2 to seal with the side wall of the well bore B. The basket 25 may be formed of rubber or the like and is tubular. The sealing basket 25 surrounds the packer I2 and is of sufficient length to project upwardly beyond the upper end `of the packer.

The springs 24 exert a sufficient shiftable tube 26 arranged longitudinally w'ithin the body Il). -The valve tube 26 passes through the flange I 1 with suitable clearance. The longitudinal opening 21 of the valve tube 26 is open at its lower end to communicate with the interior of the liner II. An integral c ap 28 closes the upper end of the opening 21. Packing packing 29. Circumferentially and longitudinally spaced ports 3| are provided in the wall of the tube 26. 'I'he ports are adapted to be brought into communication with the opening 32 of the body I6 above the flange I1 when the tube 26 is moved upwardly relative to the body. The

ports 3| are preferably of upwardly diminishing capacity having upwardly' convergent side walls and are preferably staggered 'or oiset vertically. When the valvetube 26 is in its normal or closed position the cap 28 engages the upper side of the flange I1 and the ports 3| are all out of communication with the body opening 32 above the iiange I1. Means is provided forl yieldingly holding the valve tube 26 in its down or closedposition. A nut 33 is threaded on the lower portion of the valve tube 26. A spring 34 surrounds the valve` tube 26 and is arranged under compression between the nut 33 andthe gland 36 to urge the tube 26 downwardly to the position where the ports 3| are out of communication with the body opening 32 above the iiange I1.v p

Means is provided for controlling or operating the valve I3. `In accordance with the' broader aspects of theinvention the means for operating theV valve I3 may be varied considerably. The particular valve operating means illustrated ln the drawings includes a line or cable C adapted to be run' through the test string 45 and a mandrel or rod' 35 on the lower end of the cable C. A series of spring fingers 36 is provided on the lower end of the rod `35. The spring lingers 36 have lugs 31 adjacent their lower ends. The lugs 31 have inclined upper and lower faces.

A `socket'38 is provided in the upper end of the cap 28 and is adapted to receive the `iingers 36. An inwardly projecting annular ilange 39 is provided o'n the wall of the socket 38 adjacent its upper end; The flange 39 has a downwardly and inwardly inclined upper surface 46. When the may be placed on the cable C to overcome the spring 34 and move the valve tube 26 upwardly. The spring ngers 36 may be disengaged or released from the socket 38 by suddenly jerking or moving the cable C upwardly with a comparatively heavy force. This disengagement` of the ngers 36 from the socket 38 frees the cable C from the valve tube 26.

4 'Ihe liner II, the packer I2 and the valve means described above are specifically described and claimed in our co-pending application, referred to above.

The rotatable connecting device I4 between the test string 45 and the tester body I6 includes a tubular member 46 on the string 45 and a tubular member 4I on the body I6. The members 46 and 4I are telescopically assembled and are related for relative rotation and longitudinal movement so that either member can be moved a limited distance lengthwise or rotated independently of the other member. An adapter or coupler`42 is threaded on the upper end of the member 46. The coupler 42 has a central longitudinal opening 43 `which is preferably tapered downwardly and inwardly. In the particular form of the invention being described the member 46 is the outer part of the connecting device I4 and is tubular having a central longitudinal opening 44. The lower end of the test string/46 is threaded on a pin. 46 on the upper end of the coupler 42. Ports 41 are provided in the pinl 46 and the coupler 42. In the form of the invention being described the ports 41 fare closed by suitable plugs 8. The outer member 46 of the device I4 is provided between its ends with an annular internal flange 48. A nut or guide 49 is threaded in the lower end of the member 46.

The inner member 4I of the device I4 is an elongate tubular part having a central longitudinal opening 56. The member 4I is connected with the upper end of the body I6. In the construction illustrated irtl the drawings a cap 5I is threaded on ther pin I5 on the upper end of the body I6. The cap 5| has a reduced threaded opening 52 in its upper portion and the lower end of the member 4I is threaded into the opening 52. The cap 5I may have' the same internal diameter as the body I6 and may be considered as an extension ofthe body. The cap 5I is'of sufficient length to receive the valve tube 26 when the valve tube is moved upwardly to its open position. The member 4| projects upI wardly from the capA 5I to extend through the guide 49 and the flange 48. The member 4I is suitably guided in the guide 49 and the flange 48. Rings 1 of packing are provided in the openings of the guide 49 and flange 48 to seal about the member 4 I. The passage or opening 56 of the member 4I maintains the lower end of the string 45 in communication with the opening 32 of the body I6 above the flange I1. 'A collar or flange 54 is provided onl the upper end of the member 4I. The flange 48 and theflange 54 are adapted to cooperate to limit the relative longitudinal movement between the members 46 and 4I in one direction. The guide 49 and the cap 5f are adapted to cooperate to limit the relative longitudinal movement between the

members

46 and 4| in the other direction.

Clutch means are provided to connect the members 46 and 4I for the transmission of rotation when in the extended position and when in the contracted position.` Clutch parts 55 are dii provided on the upper side of the flange 48 and l complementary clutch parts 56 are provided on the under side of the flange 54. When the string 45 is moved upwardly the clutch parts 55 may be brought into cooperation with the clutch parts 56 to connect the

members

46 and 4| for the transmission of rotation. When the

clutch parts

55 and 56 are in cooperation the string 45 may be turned to turn the body I6 and theparts connected therewith. Suitable clutch parts 51 are provided on the lower side of the guide 49. Complementary clutchparts 58 may be provided on the upper end of the cap 5I. When the string 45 is lowered the clutch parts 51 may be brought into cooperation with the clutch parts 58 to clutch the connecting device I4 for the transmission ofv rotation.

When the well is to be tested the body I6 carrying the liner II, the packer' I2 and the valve I3 is connected with the lower end ofy the string 45 by the rotatable connecting device I4. The string 45 is run into the well bore B until the lower end 2| of the packer I2 engages the shoulder X of earth formation. When the packer I2 is in this position the liner Ilextends ofthe packer I2 the string 45 may be reciprocatedL or rotated, or both, to prevent it from becoming sanded or mudded in the well. The device I4 allows this manipulation without disturbing the tester proper. The basket 25 of the packer I2 is expanded against the wall of the well bore B by the hydrostatic pressure in the well and effects a tight seal between the well bore B and the rat-hole H.

Following the setting of the packer I2 the valve I3 is opened to place the rat-hole H in communication with the test string 45. To open the valve I3 the line or cable C is` run into the string 45 to have the rod 35 pass downwardly through the

openings

43 and 50 and to enter the spring,

ngers 36 in the socket 38. The lline-or cable C is raised and the lugs 31 cooperate with the ange 39 to transmit the upward movement to the valve tube 26. In this manner the valve tube 26 may be raised against the action of the spring 34. It is preferred to raise the valve tube 25 slowly lso that the ports 3I are slowly broughtinto comthrough the member 4I into the string 45. T'he valve I3 may be opened slowly to provide for the gradual reduction in pressure on the uid in the rat-hole H to reduce the possibility of caving or sanding up the rat-hole H. The gradual opening of the valve I3. also may assist in preventing the packer I 2 from being crushed or excessively wedged against the shoulderX. l

The uid inthe stratum penetrated by the rathole H may -flow in suicient quantities and under suicient pressure to pass upwardly through the stringv45 to the upper end of the well. In some cases it may be necessary to pump the test uid from the string 45. The test vstring 45 is :adapted to receive the test uid produced from the formation penetrated by the rat-hole H, which test uid is uncontaminated by the mud or uid in the well bore B. .Subsequent to the opening of ther valve I3 or if desired subsequent to the setting of the packer I2, the string 45 may be raised or brought to a position where the

clutch parts

51 and 58 and the

clutch parts

55 and 56 are spaced apart. Whenthe string 45 is in this position it may be rotated or reciprocated freely without turning or disturbing the body IU- or the other parts of the tester. This movement of the string 45 may be continuous'throughout the test or the string 45 may be rotated or reciprocated from time to time to prevent the string-from be-A cming frozen in the well.' Asis well understood by those skilled in the art, the rotation and/or reciprocation of the string 45 will prevent the cuttings and sand'from settling out of the mud and accumulating about the string `45 and the string is thus maintained free. As the test string 45 may be maintained free so longas the rotation or Vreciprocation of the string 45 is continued, a test of a long duration may be made.v

When a lsuiicient sample or test has been ob'; tained the cable C is suddenly raised to release the spring lingers 36 from the socket 381. Upon` the disengagement of the springE fingers 36 from the socket 38 the spring34 automaticall'yreturns the valve tube 42li to the closed positionwhere the lower end of the head 28 seals against the flange I1. The string 45 may thenberaised to remove the testing apparatus from the well.

When the packer I2 andthe liner II are not sanded or caught in the well the string 45 may be readily pulled upwardly to remove the entire testing apparatus from the well. `The .liner II is tapered so that it maybe easily pulled from the rat-hole H even though the rat-hole may be caved or sanded up. In the event that the packer I2 is immovably caught in the wellthe string 45 may be pulled upwardly towithdraw 'the liner I I through the packer I2. 'Ihe springs 24 yield to permit this withdrawal of the liner II through the 'packer I2.

If desired or'believed necessary the string 45 may be suddenly raised to bring the -clutch parts 55 into jarring engagement with the clutch parts 56 to provide an upward jarring action or the string 45 may be suddenly dropped to bring the clutch parts 51 into jarring engagement with the-clutch parts 58. This jarring of the testing apparatus may free the caught liner or packer from the well. If the packer I2 is xed vor caught in the well and the liner is withdrawn through the packer, as above described, the testing apparatus may be removed from the well leaving the packer seated on the shoulder X. As the packer I2 is formed of a drillable material it may be readily drilled up by suitable drilling tools to leave the well unobstructed for further operations. v

In the event that the packer I2 and the liner II, or either one of them, is immovably caught in the well, it may be desired to unthread the body AIll'from the liner to allow the body I0, the valve I3 and the rotatable connection I4 to be withdrawn from the well on the string 45.l

or may be lowered to bring the clutch parts 51,

into engagement with the clutch parts 58. Fol,-

-lowing this raising or' lowering of the string 45 the string is rotated to break the shear pin 3 and unthread the lower end of the body I0 from the coupling I5. Following the disconnectionI of the body I0 from the liner II the string 45 togethei with the body III andrdevice I4 may be removed from the well leaving the drillable liner II and packer I2 in the, well bore. The liner and packer may be readily drilled up by suitable drilling tools to leave the well bore free and unobstructed. The string may be rotated or reciprocated when possible or practical to assist in maintainingv the string 45 free.

Figs. 5, 6 and 7 of the drawings illustrate a form ofthe invention wherein circulation may be maintained in the well throughout the use or,

operation of the device or tester. The apparatus illustrated in Figs. 5, 6 and 7 includes, generally, a tubular circulation string S, a test string 45, atubular body Ille, a liner II, a packer'IZ associated with the liner II, a valve I3a in the in Figs. 1 to 4, inclusive, of the drawings, and corresponding reference numerals are applied mation being tested and to conduct this fluid to the surface of the ground or to retain the test fluid as the case may be. The test string 45 extends longitudinally through the string S with suitable clearance to leave a passage for the free flow of the circulation fluid.

The body III is connected with the lower end of the test string 45 and is provided to house'the valve |3. The body I0 is an elongate tubular structurel arranged longitudinally within the string S. In the construction illustrated in the drawings a pin 63 is provided on the upper end of the body III and is threaded into the lower end of the test string 45 whereby the .body I0 forms a continuation of the test string. An annular internal flange I1 is provided on the body I0 adjacent its upper end. A nipple 6I is provided on the lower end of the body III andpresents a downwardly facig annular shoulder 62. The nipple 6| has a downwardly and inwardly tapered part 63 projecting from its lower end.

The valve I3 is provided to govern the admission of the test fluid to the lower end of the test string 45. The valve I3 is housed in the body I and is similar to the valve I 3 described above. The valve I3 includes a tube 26 having a longitudinal opening 21 closed at its upper end by a cap 28. The tube 26 shiftably or slidably passes through the ange I1l Longitudinally and circumferentially spacedports 3| of upwardly diminishing capacity are provided in the wall of the tube 26. The ports 3| have upwardly convergent side walls and normally `communicate with thel interior of the body I0 below its flange |1. Thehead 26 has a downwardly facing valve surface 64 adapted to seat 64 cooperates with theflange |1.

against the iiange I1 to close off communication between the lower end of the test string 45 and the interior of the body I0 below the flange. Means is provided for yieldingly urging the valve tube 26 to its down position where the surface A nut 33 is threaded on the lower end ofthe valve'tube 26. A nut 30 is threaded in the body I0 below the ange I1. A spring 34 surrounds the valve tube 26 and is arranged under compression between the nuts 33 and 36. Packing 29 is compressed between the nut 30 and the flange I1 to seal about the valve tube 26` Means is provided for facilitating the `raising 'be received in a socket 38 in the head .26. A

flange 39 is provided on the wall of Athe socket 38 adjacent its upper end. When the line or cable C1 is run downwardly through the string 45 the fingers 31 enter the flaring upper end of the socket 362i.4 'I'he fingers 31 flex inwardly past the flange 39 under the weight of the rod 35.

The springiingers 31 are adapted to cooperate with the under side of the flange 39 to connect the cable C1 with the valve tube 26 whereby the cable may be raised to bring the 4ports 3l into communication with the test string 45'.

The connecting device I4 forms a 4connection between the strings 45 and S and the liner |I and is such that the strings may be rotatedand reciprocated during the testing operation without shifting or disturbing the liner II orl the packerv I2. In accordance with the form of `the. invention being described the device I4 is such that circulationv may be maintained in the well throughout the test. The connecting device I4 .includes a tubular member 40 secured to the lower end of the string S and a tubular member 4I secured to the liner I I.

The members 46 and 4I are telescopically `related, for relative rotation and longitudinal movement. A pin 65 is provided on the upper end of the member 40 and an adapter or coupier 42 is threaded on the pin 65. A pin 46 on the upper end of the coupler 42 is threaded into the lower end' of the circulation string S. The coupler 42 may be identical with the above described coupler 42. The socket 43 in the upper end of the coupler 42 is adapted to receive the tapered part 63 of the nipple 6|. The

socket 43 is tapered downwardly. and inwardly and packing rings 66 are provided in the socket. to seal with the nipple part 63. A packing washer 61 is arranged between the shoulder 62 and the upper end of the coupler 42 to insure a tight seal betweenA the coupler and the nipple 6I. and the pin 46 to conduct the circulation fluid from the string S 'to the well bore. It is to be noted that the ports 41 discharge the circulation fluid into the well bore B a short distance above the packer I2 to maintain circulation in substantially theentire well bore.' The outer member 40 has an internal flange 48 between its ends. A guide 49 is threaded `in the lower end of the member 4IJ.

The inner member 4 I of the device I4 is connected with the upper end of the liner II. In the preferred construction illustrated, a coupling I6 is threaded on the upper end of the liner I I and has a reduced opening 68 in its upper end. The lower end of the member 4| is threaded into the opening 68. 'Ihe threads of the member 4I and the opening 68 are preferably lefthand threads whereby the member 4I may be unthreaded from the coupling I6 without disturbng the threaded connections in the string S and the other parts of the apparatus. In practice a suitable shear pin may be arranged in openings in the coupling I6 and the member 4|. The member 4 I extends upwardly from the coupling I6 to shiftably pass through the guide 49 and the flange 48, Packing rings 1 are -provided in the openings of the guide 49 and the flange 48 to seal about the member 4|.

Clutch means are provided on the members 40 and 4i for the transmission of rotation when it is desired to unthread the member 4I from the coupling I6 or when for any reason it is desirable to rotate the tester. A ange 54 is provided on the upper end of the member 4I and carries clutch parts 56. Complementary clutchv parts 55 are provided on the upper side of the flange 48. The

clutch parts

56 and 55 may be engaged by raising the string S whereupon the string S may be rotated to transmit rotation to the member 4|. Clutch parts 51 are provided on the lower side of the guide 49 and complementary clutch parts 58 are provided on the upper end of the coupling I6. The

Ports 41 are provided in the coupler 42A clutch parts 51a may be engaged with the clutch v parts 58'by moving thestring S downwardly.

mation 'Ihe weight or a portion of thev weight of the string .S may be imposed on the packer I2 it is desired to open the valve Iiin to admit the to force the blades 20 into the earth vformation. Following this seating of the packer I2 the test string A58 carrying the body I0 may berun into the string S. The tapered part 63.15 adapted to enter and seat in the socket 43 to support the body III and the string 45a. The part 63 seatedl in the socket 4 3 is effectively sealed about by the packing rings 66and the washer 61. When test fluidto the string 45a, the cable C1 carrying the rod :i is run into the string 45'. As above vdescribed the spring fingers 31 are adapted to enter the socket 38a and cooperate with the flange 39H' for the transmission of upward force to the tube 26a.- 'I'he cable C1 may be raised to move the tube 26 upwardly. 'Ihe upward movement of the tube 26a uncovers the ports 3la above lthe liange I'IEL placing the interiorI of the tube in communication with the test string 45. This allows the test fluid to ow upwardly from the rat-hole H into the test string 458.

Immediately upon the setting of the string 45, and thereafter, circulation iiuid may be pumped downwardly through the string, S to discharge from the .ports 41,` .This circulation-fluid flowing through the well vbore B prevents the string S from becoming sanded or frozen in the well end of the test string- 45.

of the valve I3 the test string 45* containing.

bore. If desired or found necessary the string S may be rotated continuously during the test or, if desired, the string S may be reciprocated. The device I4El is such that the string S, carrying the 4string 45, may be rotated and/or reciprocated at will throughout the test operation without moving or disturbing the liner II or the packer I2. In this manner the string S is provented from becoming stuck or frozen in the well bore B.

When a suicient test has been obtained the cable C1 maybe suddenly raised to free the spring n'gers 311i from the socket 38 whereupon the cable C1 may bewithdrawn from the well.

The spring 34B automatically moves the valve tube 26 downwardly to bring the surface 64 against the .flange I1. This closes the lower Following the closing the test iluid may be withdrawn from the well bore. Following the removal of the string y45|, the string S may Abe withdrawn from the well. In most instances the string S may be merely pulled upwardly to carry with itthe liner II and the' packer I2. In some cases it maybe found necessary to turn orV jar the liner II and the packer I2 to free them for removal. The string S may be moved longitudinally to engage the

clutch parts

51 and 58, or the clutch parts 55'l vand 56B, vwhereuponthe string S may be rotated. lThe clutch parts transmit the rotation of the liner II which in turn may transmit the rotation to the packer I2. The rotation of thev liner and packer may free them for removal.

To impart a jarring action to the test equipment `the string S may be' reciprocated to bring the it may become necessary to disconnect the string S from the liner II. To disconnect the string S from the liner II the string S is moved either up or down to engage the clutch parts. The string S is then rotated in a direction to unthread the member 4Iab from the opening 6l. The rotation of the string breaks the shear pin A10. Upon the unthreading of the member 4I* from the opening 68 the string S carrying vthe device I4a may be removed from the well. This leaves the liner II and the packer I2 in the well bore. The liner andI packer are formed of drillable materials and may be easily drilled up by suitable drilling tools to leave the well bore unobstructed for furtherpperations. A

Having described only typical preferred forms and applications of our invention we do not wish to be limited orrestricted to the specific details herein set forth, but wish to reserveto ourselves any variations or modifications that may appear to those skilled in the art or fall within the scope ofthe following claims. l

vHaving described our invention, weclaim:

1. Well testing.apparatus'including a tubular test string, a tubular body, a liner for receiving fluid from the well, a connection between the body and liner releasable by rotation, a packer associated with the liner to pack oi thewell, a valve in the body for controlling the flow of fluid from the liner to the string, and a swivel con-y valve in the body for controlling the flow of fluid from the liner to the string.. and a swivel connection between the body and string comprising two tubular iluid conducting members telescopi; cally related for free rela-tive rotative and limited longitudinal movement. and parts on the .members engageable by relative longitudinal movement between the members to transmit rotation to release the rst mentioned connection.

3. Well testing apparatus including a tubular test string, a tubular body, a liner for receiving fluid from the well, a connection between the body and liner releasable -by rotation, a packer associated with the liner to pack oil' the well, a valve in the body for controlling the flow of iiuid from the liner to the string, a swivel connection between the body and string allowing rotation of the string relative to the body, the swivel connection including parts engageable bymanipulation of the string to transmit rotation to the body to vrelease the rs't mentioned connection, and kan element passed through the string' and the swivel connection to control the valve.

4. Well testing apparatusincluding a liner for receiving fluid from the well, Aa packer associated with the liner` and operable to pack oif the for relative rotation a-nd longitudinal movement 'tubular circulation string for carrying circulation fluid, said strings beingv one within the other and both extending downward to adjacent the@ liner and a connection rotatably connecting the lower ends of said'strings `with the liner and discharging the circulation iluid into the well.

5. Well testing apparatus including a liner fork reciving fluid from the well, a packer associated with the liner and operable to pack ofi `the well, a'test string for receiving the test iluid, a tubular circulation string for carrying circulation iluid, and a connection rotatably connecting said stringswith the liner and discharging the circulation iiuid into the well, said connection comprising, two telescopically associated members related for relative rotationone of said members being connected with the said strings and having a port for discharging the circulation fluid, the other member being tubular and connected with the liner to conduct the test iiuid therefrom to the test string.

6. Well testing apparatus including a liner for receiving uid from the well, a packer associated with the liner and operable to pack off the well, a test string for receiving the test fluid, a tubular circulation string extending downwardly around the teststring to a point adjacent the liner for carrying circulation rluid, a valve in the ltest string, and a rotatable fluid conducting connection between the liner and the lower ends of the circulation string and the said test string.

7. Well testing apparatus including a liner for related for relative rotation fand longitudinal movement, one member being connected with the string, and having a port in communication with the string and opening to the exteriors of said members for discharging iluid` into the well, the other member being connected with the tool, and

clutch parts on the members engageable for the with the strings, the other member connected4 with the tester, the rst mentioned member having a port for discharging the circulation fluid in the well, and parts on the members engageable for the transmission of rotation.

11. Anapparatus for making formation'tests in wells comprising .a tubular test string of pipe, packing means, on the test string ,for isolating the lower portion of the well to be tested from the upper portion, valve means adjacent the packing means for keeping the test string dry while the" apparatus is being lowered into the well, and means adapted to be introduced through the test string and connected to the valve means -for openingtheyalve means after the packing means has been seated.

12. An apparatus for making formation tests in'wells comprising a tubular test string-of pipe,

receiving fluid from the well, a packer associated 'ppacking means" on the "test string for isolating tion between the second mentioned member and# the liner. y V

8. Well testing apparatus including a liner for receiving fluid from `the well, a packer associated with the liner and operable to pack off the well,V a test string for receiving the test fluid, a tubular circulation string for carrying circulation iiuid,

.a valve in the test string, and aV rotatable fluid conducting connection between the linerand said strings, said connection comprising, a member connected with said strings and having a port for discharging the circulation fluid into the well, a member related to the first mentioned member and operable to conduct the test iluid from the liner to the`test string, a connection between the second mentioned m'em r and the liner releasable by. rotation, and parts' on the members engageable by relativelongitudinal movement to transmit rotation for'releasing the last named A connection from the liner.

9. In combination, an operating string, a well' tool. and'meanslrotatably connecting the string Vand the tool, said means including, two members the lower portion of the well to be tested from the upper portion, valve means adjacent the packing means for keeping Athe test string dry while the apparatus is being lowered into the well,

` and means adapted to beintroduced through the test string and connected to the valve means for opening the valve means after the packing means has been seated, the connection between the test string and the packing means. being such as to -permit rotation of the test string while the packlng means remains seated so as to prevent stick-l ing of the test string.

13. Well testing apparatus including a liner for receiving fluid from the well, a packer asso,

ciated with the liner to pack ofi the well, a tubular test string, and means releasably and' rotatably connecting the test string with the liner whereby the string may be rotated freely and contive longitudinal position, onemember being secured to the test string, readily releasable threads connecting the other member with the liner, a shea-r pin normally connecting the said other member and the liner against relative rotation, and clutch parts on the members cooperable to transmit rotation to break the shear pin and unthread the threads and thus detach the said other memberl from the liner.

ELWIN B.`HALL.