US1654463A

US1654463A - Casing head

Info

Publication number: US1654463A
Application number: US165127A
Authority: US
Inventors: George H Jaques
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-02-01
Filing date: 1927-02-01
Publication date: 1927-12-27
Anticipated expiration: 1944-12-27

Description

G., H. JAQUE@ CAS I NG HEAD Filed Feb. l. 19271 Ii w,

tn-WMM T viii/Ila Patented Der. 27, 1927. .I y

UNITED-STATES GEORGE n. JAaUEs, or casrnn, WYOMING.'

y CASING HEAD.

Application led February 1, 1927. Serial No. 165,127.

vThe invention relates to a novel form of v casing head for oil vwells and the like,pro' vided with aset of slips to land or support an inside string ofcasing or tubing and a second set of slips to anchor the inside string.

the packing may be applied, removed or ady justed without effecting the relation of the supporting and landing slips'and the inner string of casing or tubing, the particular coordination of the casing head and the slips preventing the accidental movement of the inner string of casing or tubing in either direction with respect to the casing to which the head is applied'. The invention is illustrated in the accompanying drawings, in which U f Fig. 1 is a sectional elevation of the head as applied to the outery casing and the inner 'casing or tubing.

Fig. 2 is a vertical sectional elevation of the supporting or landing slips.

l Fig. 8 is a plan view thereof.

Fig. 4 is a sectional elevation of the anchoring slips.

Fig. 5 is a plan view thereof.

Referring to the drawings, 1 indicates the main or body portion of thetubular head, the lower end of which is provided with internal screw threads 2 to engage the threadedend of the outer casing C. The interior of the tubular body portion l is' provided with an intermediate downwardly tapered bore 5 which constitutes a seat for the landing or supporting slips and above the tapered bore is a cylindrical bore section 3 having an annular shoulder 4 at its bottom, which serves as a seat for the lower packing ring.

Removably engaging the downwardly tapering bore section 5 are thel supporting orl anchoring slips 10, which are arcuate in cross section and have their inner faces provided with upwardly inclined teeth or serrations 11 and their outer peripheral faces beveled or inclined' to engage the inclined wall of the tapered bore section 5. As indicated in Fig. 1, the serrated inner faces of the slips surround and engage the inner string. of casing or tubing T and .prevent any downward movement of the latter.

Mounted in the cylindrical upper bore section 3 is a suitable acking comprising overlapping compressi le gaskets 15 heldl between lower and upper

split packing rings

16, 16, the` former of which restsupon the 'annular shoulder 4.

Engaging the upper end of the cylindrical portion ofthe bore and the packing therein are anchoring slips v`18, which are arcuate in cross section and have their interior surfaces provided with a series of annular downwardly extending teeth or serrations 19 and their outer peripheral faces provided with an upward taper, so that the slips, when assembled, constitute a vertical split frustum of a cone, which surrounds the inner string of casing or tubing T, as indicated in Fig. 1, with the lower end of the slip sections engaging the packing.

Secured in the upper end of the tubular member lis a series of studs or bolts-23 having adjustin nuts 24 on their outer ends, said bolts passing through. holes 22 in an anchoring ring 20, the inner periphery of which ring is provided withV a downwardly flaring or tapering surface 21 cooperating with the upwardly tapering surfaces of the slips 18.

The various parts are assembled and adjusted as illustrated in Fig. 1; that is to say, the casi-ng head 1 is engaged with the upper end of the outer casing C and the p landing or supporting slips 10 are driven home in the tapered section 5 of the bore, so that the teeth or serrations on the inner faces casing or tubing T and rigidly support the latter against downward movement. The packing is then applied in the upper cylindrical bore section 3, as shown, and the upper or anchoring slips placed in position above the packing, after which the anchor ring 20 is threaded over the bolts 23. As the nuts 24 are set up on the bolts 23, the anchoring slipsi are. tapped down 'evenly with a hammer unt-il the packing 15 is sufliciently compressed to produce a lfluid-tight joint between the casing head and the inner string of casing or tubing. This precaution is necessary in order to prevent the anchoring slips from gripping the inner string before the packing is suiciently compressed to effect a tight joint.

As thus constructed and applied, it will be seen that the new casing head not only serves to support the weight of the anchored string of casing or tubing within the outer casing and prevents the well pressure from raising the inner string, but inasmuch as of the slips bite into the surface of the inner j and upwardly tapered peripheral outer the packing is held-in position and properly compressed by the upper anchoring slips, it will be apparent that both the packing and the upper anchoring slips may be applied and adjusted Without moving or ,handling the inner string of casing or tubing, as the latter is supported in the casing head 1 by means of the lower or landing slips 10;

-reapplied after the inner casing or tubing has been properly landed or positioned. f

What I claim is; 1. A casing head comprising a tubular member adapted to be secured to the well casing and provided with a downwardly tapering bore, arcuate slips having serrated inner faces and tapered outer peripheral U faces engaging the tapered bore, packing in ,thepbore above the'slips, arcuate anchoring slips above the packingl havingserrated faces faces, an anchor ring having a; tapered opening vengaging the peripheral. faces of said anchoring slips, and means for adjustably connecting said ring to the upper end of the tubular member.

2. A casing-head comprising a tubular member adapted to be secured to the well casing and provided with a downwardly tapering bore, arcuate slips havingserrated yinner faces and tapered outer peripheral faces engaging the tapered bore, packing inl the bore above the slips, arcuate anchoring slips above the packing vhaving serrated faces and ,upwardly` tapered peripheral Y outer faces, an anchor ring having a tapered opening engaging the peripheral faces of Y' said anchoring slips, and bolts engaging the.

upper end of the tubular member for adl justing the anchor ring.

3. A casing head comprising a tubular member adapted to be 'secured to the up er end of a well casing and having a cylin rical upper bore section and a downwardly taperlng lower bore section, arcuate landing slips having serrated inner faces and' tapered outerperipheral faces engaging the tapered bore, packing in the cylindrical bore section, arcuate anchoring slips above the .packing having serrated inner 'faces and up- Wardly tapered peripheral outer faces, an

anchor ring 4having a tapered'opening engaging the peripheral faces of said anchor- 111g slips, and means for adjustably connecting said ring to the upper end of the tubular member.

4. A casing heady comprising a tubular member 'adapted to be secured to the upper end of a well casing andhaving^a cylindrical upper bore'section and a downwardly tapering lower bore section, arcuate landing slips having serrated inner facesl and tapered outer peripheral faces engaging the tapered bore, packing in the cylindrical bore section, arcuate anchoringslips above `the packing having serratedV inner faces and upwardly tapered peripheral outer faces, an anchor ring having a tapered opening engaging the/peripheral faces of' said anchoring slips, and bolts engaging the upper end of the tubular member for adjusting the anchor ring.

In testimony whereof I affix my signature.

j GEORGE I-I. JAQUES